Only remount on startup if remount args are set (#1222)

* Fix issue mounting APFS drives with MNT_JOURNALED

* typo

.allstar/binary_artifacts.yaml

@@ -0,0 +1,19 @@
+# Ignore reason: These crafted binaries are used in tests
+ignorePaths:
+- Fuzzing/common/MachOParse_corpus/ret0
+- Source/common/testdata/bad_pagezero
+- Source/common/testdata/missing_pagezero
+- Source/common/testdata/missing_pagezero
+- Source/common/testdata/missing_pagezero
+- Source/common/testdata/32bitplist
+- Source/common/testdata/BundleExample.app/Contents/MacOS/BundleExample
+- Source/common/testdata/DirectoryBundle/Contents/MacOS/DirectoryBundle
+- Source/common/testdata/DirectoryBundle/Contents/Resources/BundleExample.app/Contents/MacOS/BundleExample
+- Source/santad/testdata/binaryrules/badbinary
+- Source/santad/testdata/binaryrules/goodbinary
+- Source/santad/testdata/binaryrules/badcert
+- Source/santad/testdata/binaryrules/banned_teamid_allowed_binary
+- Source/santad/testdata/binaryrules/banned_teamid
+- Source/santad/testdata/binaryrules/goodcert
+- Source/santad/testdata/binaryrules/noop
+- Source/santad/testdata/binaryrules/rules.db

.bazelrc

@@ -3,3 +3,45 @@ build --apple_generate_dsym --define=apple.propagate_embedded_extra_outputs=yes
 build --copt=-Werror
 build --copt=-Wall
 build --copt=-Wno-error=deprecated-declarations
+# Disable -Wunknown-warning-option because deprecated-non-prototype
+# isn't recognized on older SDKs
+build --copt=-Wno-unknown-warning-option
+build --copt=-Wno-error=deprecated-non-prototype
+build --per_file_copt=.*\.mm\$@-std=c++17
+build --cxxopt=-std=c++17
+build --host_cxxopt=-std=c++17
+
+build --copt=-DSANTA_OPEN_SOURCE=1
+build --cxxopt=-DSANTA_OPEN_SOURCE=1
+
+# Many config options for sanitizers pulled from
+# https://github.com/protocolbuffers/protobuf/blob/main/.bazelrc
+build:san-common --strip=never
+build:san-common --copt="-Wno-macro-redefined"
+build:san-common --copt="-D_FORTIFY_SOURCE=0"
+build:san-common --copt="-O1"
+build:san-common --copt="-fno-omit-frame-pointer"
+
+build:asan --config=san-common
+build:asan --copt="-fsanitize=address"
+build:asan --copt="-DADDRESS_SANITIZER"
+build:asan --linkopt="-fsanitize=address"
+build:asan --test_env="ASAN_OPTIONS=log_path=/tmp/san_out"
+
+build:tsan --config=san-common
+build:tsan --copt="-fsanitize=thread"
+build:tsan --copt="-DTHREAD_SANITIZER=1"
+build:tsan --linkopt="-fsanitize=thread"
+build:tsan --test_env="TSAN_OPTIONS=log_path=/tmp/san_out:halt_on_error=true"
+
+build:ubsan --config=san-common
+build:ubsan --copt="-fsanitize=undefined"
+build:ubsan --copt="-DUNDEFINED_SANITIZER=1"
+build:ubsan --copt="-fno-sanitize=function" --copt="-fno-sanitize=vptr"
+build:ubsan --linkopt="-fsanitize=undefined"
+build:ubsan --test_env="UBSAN_OPTIONS=log_path=/tmp/san_out"
+
+build:fuzz --config=san-common
+build:fuzz --@rules_fuzzing//fuzzing:cc_engine=@rules_fuzzing//fuzzing/engines:libfuzzer
+build:fuzz --@rules_fuzzing//fuzzing:cc_engine_instrumentation=libfuzzer
+build:fuzz --@rules_fuzzing//fuzzing:cc_engine_sanitizer=asan

.bazelversion

@@ -1 +1 @@
-5.0.0
+6.3.2

.github/workflows/check-markdown.yml

@@ -11,4 +11,4 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - uses: gaurav-nelson/github-action-markdown-link-check@v1
-    - run: "! git grep -EIn $'[ \t]+$'"
+    - run: "! git grep -EIn $'[ \t]+$' -- ':(exclude)*.patch'"

.github/workflows/ci.yml

@@ -1,5 +1,4 @@
 name: CI
-
 on:
   push:
     branches:
@@ -11,54 +10,42 @@ on:
       - main
     paths:
       - 'Source/**'
-
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
       - name: Run linters
         run: ./Testing/lint.sh
-
-
   build_userspace:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-10.15, macos-11, macos-12]
+        os: [macos-11, macos-12, macos-13]
     runs-on: ${{ matrix.os }}
     steps:
-     - uses: actions/checkout@v2
-     - name: Build Userspace
-       run: bazel build --apple_generate_dsym -c opt :release --define=SANTA_BUILD_TYPE=adhoc
-
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
+      - name: Build Userspace
+        run: bazel build --apple_generate_dsym -c opt :release --define=SANTA_BUILD_TYPE=adhoc
   unit_tests:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-10.15, macos-11, macos-12]
+        os: [macos-11, macos-12, macos-13]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
       - name: Run All Tests
         run: bazel test :unit_tests --define=SANTA_BUILD_TYPE=adhoc --test_output=errors
-
   test_coverage:
     runs-on: macos-11
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
       - name: Generate test coverage
         run: sh ./generate_cov.sh
       - name: Coveralls
-        uses: coverallsapp/github-action@master
+        uses: coverallsapp/github-action@09b709cf6a16e30b0808ba050c7a6e8a5ef13f8d # ratchet:coverallsapp/github-action@master
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           path-to-lcov: ./bazel-out/_coverage/_coverage_report.dat
           flag-name: Unit
-
-  benchmark:
-    runs-on: macos-11
-    steps:
-      - uses: actions/checkout@v2
-      - name: Run All Tests
-        run: ./Testing/benchmark.sh

.github/workflows/continuous.yml

@@ -1,13 +1,13 @@
 name: continuous
 on:
   schedule:
-    - cron: '* 10 * * *' # Every day at 10:00 UTC
+    - cron: '0 10 * * *' # Every day at 10:00 UTC
   workflow_dispatch:  # Allows you to run this workflow manually from the Actions tab
 
 jobs:
   preqs:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Checks for flaky tests
         run: bazel test --test_strategy=exclusive --test_output=errors --runs_per_test 50 -t- :unit_tests --define=SANTA_BUILD_TYPE=adhoc

.github/workflows/e2e.yml

@@ -0,0 +1,46 @@
+name: E2E
+
+on:
+  schedule:
+    - cron: '0 4 * * *' # Every day at 4:00 UTC (not to interfere with fuzzing)
+  workflow_dispatch:
+
+jobs:
+  start_vm:
+    runs-on: e2e-host
+    steps:
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
+      - name: Start VM
+        run: python3 Testing/integration/actions/start_vm.py macOS_14.bundle.tar.gz
+
+  integration:
+    runs-on: e2e-vm
+    env:
+      VM_PASSWORD: ${{ secrets.VM_PASSWORD }}
+    steps:
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # ratchet:actions/checkout@v3
+      - name: Add homebrew to PATH
+        run: echo "/opt/homebrew/bin/" >> $GITHUB_PATH
+      - name: Install configuration profile
+        run: bazel run //Testing/integration:install_profile -- Testing/integration/configs/default.mobileconfig
+      - name: Build, install, and start moroz
+        run: |
+          bazel build @com_github_groob_moroz//cmd/moroz:moroz
+          cp bazel-bin/external/com_github_groob_moroz/cmd/moroz/moroz_/moroz /tmp/moroz
+          /tmp/moroz -configs="$GITHUB_WORKSPACE/Testing/integration/configs/moroz_default/global.toml" -use-tls=false &
+      - name: Build, install, and sync santa
+        run: |
+          bazel run :reload --define=SANTA_BUILD_TYPE=adhoc
+          bazel run //Testing/integration:allow_sysex
+          sudo santactl sync --debug
+      - name: Run integration test binaries
+        run: bazel test //Testing/integration:integration_tests
+      - name: Test config changes
+        run: ./Testing/integration/test_config_changes.sh
+      - name: Test sync server changes
+        run: ./Testing/integration/test_sync_changes.sh
+      - name: Test USB blocking
+        run: ./Testing/integration/test_usb.sh
+      - name: Poweroff
+        if: ${{ always() }}
+        run: sudo shutdown -h +1

.github/workflows/fuzz.yml

@@ -0,0 +1,35 @@
+name: Fuzzing
+
+on:
+  schedule:
+    - cron: '0 6 * * *' # Every day at 6:00 UTC
+  workflow_dispatch:  # Allows you to run this workflow manually from the Actions tab
+
+jobs:
+  start_vm:
+    runs-on: e2e-host
+    steps:
+      - uses: actions/checkout@v3
+      - name: Start VM
+        run: python3 Testing/integration/actions/start_vm.py macOS_13.bundle.tar.gz
+
+  fuzz:
+    runs-on: e2e-vm
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup libfuzzer
+        run: Fuzzing/install_libclang_fuzzer.sh
+      - name: Fuzz
+        run: |
+          for target in $(bazel query 'kind(fuzzing_launcher, //Fuzzing:all)'); do
+            bazel run --config=fuzz $target -- -- -max_len=32768 -runs=1000000 -timeout=5
+          done
+      - name: Upload crashes
+        uses: actions/upload-artifact@v1
+        if: failure()
+        with:
+          name: artifacts
+          path: /tmp/fuzzing/artifacts
+      - name: Poweroff VM
+        if: ${{ always() }}
+        run: sudo shutdown -h +1

.github/workflows/sanitizers.yml

@@ -0,0 +1,30 @@
+name: sanitizers
+on:
+  schedule:
+    - cron: '0 16 * * *'
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        sanitizer: [asan, tsan, ubsan]
+    steps:
+      - uses: actions/checkout@v3
+      - name: ${{ matrix.sanitizer }}
+        run: |
+          CLANG_VERSION=$(clang --version | head -n 1 | cut -d' ' -f 4)
+          DYLIB_PATH="$(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/${CLANG_VERSION}/lib/darwin/libclang_rt.${{ matrix.sanitizer }}_osx_dynamic.dylib"
+
+          bazel test --config=${{ matrix.sanitizer }} \
+            --test_strategy=exclusive --test_output=all \
+            --test_env=DYLD_INSERT_LIBRARIES=${DYLIB_PATH} \
+            --runs_per_test 5 -t- :unit_tests \
+            --define=SANTA_BUILD_TYPE=adhoc
+      - name: Upload logs
+        uses: actions/upload-artifact@v1
+        if: failure()
+        with:
+          name: logs
+          path: /tmp/san_out*

.pylintrc

@@ -0,0 +1,429 @@
+# This Pylint rcfile contains a best-effort configuration to uphold the
+# best-practices and style described in the Google Python style guide:
+#   https://google.github.io/styleguide/pyguide.html
+#
+# Its canonical open-source location is:
+#   https://google.github.io/styleguide/pylintrc
+
+[MASTER]
+
+# Files or directories to be skipped. They should be base names, not paths.
+ignore=third_party
+
+# Files or directories matching the regex patterns are skipped. The regex
+# matches against base names, not paths.
+ignore-patterns=
+
+# Pickle collected data for later comparisons.
+persistent=no
+
+# List of plugins (as comma separated values of python modules names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Use multiple processes to speed up Pylint.
+jobs=4
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
+confidence=
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+#enable=
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once).You can also use "--disable=all" to
+# disable everything first and then reenable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use"--disable=all --enable=classes
+# --disable=W"
+disable=abstract-method,
+        apply-builtin,
+        arguments-differ,
+        attribute-defined-outside-init,
+        backtick,
+        bad-option-value,
+        basestring-builtin,
+        buffer-builtin,
+        c-extension-no-member,
+        consider-using-enumerate,
+        cmp-builtin,
+        cmp-method,
+        coerce-builtin,
+        coerce-method,
+        delslice-method,
+        div-method,
+        duplicate-code,
+        eq-without-hash,
+        execfile-builtin,
+        file-builtin,
+        filter-builtin-not-iterating,
+        fixme,
+        getslice-method,
+        global-statement,
+        hex-method,
+        idiv-method,
+        implicit-str-concat,
+        import-error,
+        import-self,
+        import-star-module-level,
+        inconsistent-return-statements,
+        input-builtin,
+        intern-builtin,
+        invalid-str-codec,
+        locally-disabled,
+        long-builtin,
+        long-suffix,
+        map-builtin-not-iterating,
+        misplaced-comparison-constant,
+        missing-function-docstring,
+        metaclass-assignment,
+        next-method-called,
+        next-method-defined,
+        no-absolute-import,
+        no-else-break,
+        no-else-continue,
+        no-else-raise,
+        no-else-return,
+        no-init,  # added
+        no-member,
+        no-name-in-module,
+        no-self-use,
+        nonzero-method,
+        oct-method,
+        old-division,
+        old-ne-operator,
+        old-octal-literal,
+        old-raise-syntax,
+        parameter-unpacking,
+        print-statement,
+        raising-string,
+        range-builtin-not-iterating,
+        raw_input-builtin,
+        rdiv-method,
+        reduce-builtin,
+        relative-import,
+        reload-builtin,
+        round-builtin,
+        setslice-method,
+        signature-differs,
+        standarderror-builtin,
+        suppressed-message,
+        sys-max-int,
+        too-few-public-methods,
+        too-many-ancestors,
+        too-many-arguments,
+        too-many-boolean-expressions,
+        too-many-branches,
+        too-many-instance-attributes,
+        too-many-locals,
+        too-many-nested-blocks,
+        too-many-public-methods,
+        too-many-return-statements,
+        too-many-statements,
+        trailing-newlines,
+        unichr-builtin,
+        unicode-builtin,
+        unnecessary-pass,
+        unpacking-in-except,
+        useless-else-on-loop,
+        useless-object-inheritance,
+        useless-suppression,
+        using-cmp-argument,
+        wrong-import-order,
+        xrange-builtin,
+        zip-builtin-not-iterating,
+
+
+[REPORTS]
+
+# Set the output format. Available formats are text, parseable, colorized, msvs
+# (visual studio) and html. You can also give a reporter class, eg
+# mypackage.mymodule.MyReporterClass.
+output-format=text
+
+# Tells whether to display a full report or only the messages
+reports=no
+
+# Python expression which should return a note less than 10 (10 is the highest
+# note). You have access to the variables errors warning, statement which
+# respectively contain the number of errors / warnings messages and the total
+# number of statements analyzed. This is used by the global evaluation report
+# (RP0004).
+evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
+
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details
+#msg-template=
+
+
+[BASIC]
+
+# Good variable names which should always be accepted, separated by a comma
+good-names=main,_
+
+# Bad variable names which should always be refused, separated by a comma
+bad-names=
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Include a hint for the correct naming format with invalid-name
+include-naming-hint=no
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+property-classes=abc.abstractproperty,cached_property.cached_property,cached_property.threaded_cached_property,cached_property.cached_property_with_ttl,cached_property.threaded_cached_property_with_ttl
+
+# Regular expression matching correct function names
+function-rgx=^(?:(?P<exempt>setUp|tearDown|setUpModule|tearDownModule)|(?P<camel_case>_?[A-Z][a-zA-Z0-9]*)|(?P<snake_case>_?[a-z][a-z0-9_]*))$
+
+# Regular expression matching correct variable names
+variable-rgx=^[a-z][a-z0-9_]*$
+
+# Regular expression matching correct constant names
+const-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
+
+# Regular expression matching correct attribute names
+attr-rgx=^_{0,2}[a-z][a-z0-9_]*$
+
+# Regular expression matching correct argument names
+argument-rgx=^[a-z][a-z0-9_]*$
+
+# Regular expression matching correct class attribute names
+class-attribute-rgx=^(_?[A-Z][A-Z0-9_]*|__[a-z0-9_]+__|_?[a-z][a-z0-9_]*)$
+
+# Regular expression matching correct inline iteration names
+inlinevar-rgx=^[a-z][a-z0-9_]*$
+
+# Regular expression matching correct class names
+class-rgx=^_?[A-Z][a-zA-Z0-9]*$
+
+# Regular expression matching correct module names
+module-rgx=^(_?[a-z][a-z0-9_]*|__init__)$
+
+# Regular expression matching correct method names
+method-rgx=(?x)^(?:(?P<exempt>_[a-z0-9_]+__|runTest|setUp|tearDown|setUpTestCase|tearDownTestCase|setupSelf|tearDownClass|setUpClass|(test|assert)_*[A-Z0-9][a-zA-Z0-9_]*|next)|(?P<camel_case>_{0,2}[A-Z][a-zA-Z0-9_]*)|(?P<snake_case>_{0,2}[a-z][a-z0-9_]*))$
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=(__.*__|main|test.*|.*test|.*Test)$
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=10
+
+
+[TYPECHECK]
+
+# List of decorators that produce context managers, such as
+# contextlib.contextmanager. Add to this list to register other decorators that
+# produce valid context managers.
+contextmanager-decorators=contextlib.contextmanager,contextlib2.contextmanager
+
+# Tells whether missing members accessed in mixin class should be ignored. A
+# mixin class is detected if its name ends with "mixin" (case insensitive).
+ignore-mixin-members=yes
+
+# List of module names for which member attributes should not be checked
+# (useful for modules/projects where namespaces are manipulated during runtime
+# and thus existing member attributes cannot be deduced by static analysis. It
+# supports qualified module names, as well as Unix pattern matching.
+ignored-modules=
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=optparse.Values,thread._local,_thread._local
+
+# List of members which are set dynamically and missed by pylint inference
+# system, and so shouldn't trigger E1101 when accessed. Python regular
+# expressions are accepted.
+generated-members=
+
+
+[FORMAT]
+
+# Maximum number of characters on a single line.
+max-line-length=80
+
+# TODO(https://github.com/PyCQA/pylint/issues/3352): Direct pylint to exempt
+# lines made too long by directives to pytype.
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=(?x)(
+  ^\s*(\#\ )?<?https?://\S+>?$|
+  ^\s*(from\s+\S+\s+)?import\s+.+$)
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=yes
+
+# Maximum number of lines in a module
+max-module-lines=99999
+
+# String used as indentation unit.  The internal Google style guide mandates 2
+# spaces.  Google's externaly-published style guide says 4, consistent with
+# PEP 8.  Here, we use 2 spaces, for conformity with many open-sourced Google
+# projects (like TensorFlow).
+indent-string='  '
+
+# Number of spaces of indent required inside a hanging  or continued line.
+indent-after-paren=4
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=TODO
+
+
+[STRING]
+
+# This flag controls whether inconsistent-quotes generates a warning when the
+# character used as a quote delimiter is used inconsistently within a module.
+check-quote-consistency=yes
+
+
+[VARIABLES]
+
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
+
+# A regular expression matching the name of dummy variables (i.e. expectedly
+# not used).
+dummy-variables-rgx=^\*{0,2}(_$|unused_|dummy_)
+
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid to define new builtins when possible.
+additional-builtins=
+
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,_cb
+
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six,six.moves,past.builtins,future.builtins,functools
+
+
+[LOGGING]
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format
+logging-modules=logging,absl.logging,tensorflow.io.logging
+
+
+[SIMILARITIES]
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+# Ignore comments when computing similarities.
+ignore-comments=yes
+
+# Ignore docstrings when computing similarities.
+ignore-docstrings=yes
+
+# Ignore imports when computing similarities.
+ignore-imports=no
+
+
+[SPELLING]
+
+# Spelling dictionary name. Available dictionaries: none. To make it working
+# install python-enchant package.
+spelling-dict=
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to indicated private dictionary in
+# --spelling-private-dict-file option instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[IMPORTS]
+
+# Deprecated modules which should not be used, separated by a comma
+deprecated-modules=regsub,
+                   TERMIOS,
+                   Bastion,
+                   rexec,
+                   sets
+
+# Create a graph of every (i.e. internal and external) dependencies in the
+# given file (report RP0402 must not be disabled)
+import-graph=
+
+# Create a graph of external dependencies in the given file (report RP0402 must
+# not be disabled)
+ext-import-graph=
+
+# Create a graph of internal dependencies in the given file (report RP0402 must
+# not be disabled)
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant, absl
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+
+[CLASSES]
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,
+                      __new__,
+                      setUp
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,
+                  _fields,
+                  _replace,
+                  _source,
+                  _make
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls,
+                            class_
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=mcs
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when being caught. Defaults to
+# "Exception"
+overgeneral-exceptions=StandardError,
+                       Exception,
+                       BaseException

BUILD

@@ -198,10 +198,3 @@ test_suite(
         "//Source/santasyncservice:unit_tests",
     ],
 )
-
-test_suite(
-    name = "benchmarks",
-    tests = [
-        "//Source/santad:SNTApplicationBenchmark",
-    ],
-)

CODEOWNERS

@@ -0,0 +1 @@
+* @google/macendpoints

Conf/Package/notarization_tool.sh

@@ -2,5 +2,5 @@
 
 # Example NOTARIZATION_TOOL wrapper.
 
-/usr/bin/xcrun altool --notarize-app "${2}" --primary-bundle-id "${4}" \
-  -u "${NOTARIZATION_USERNAME}" -p "${NOTARIZATION_PASSWORD}"
+/usr/bin/xcrun notarytool submit "${2}" --wait \
+  --apple-id "${NOTARIZATION_USERNAME}" --password "${NOTARIZATION_PASSWORD}"

Conf/Package/package_and_sign.sh

@@ -28,8 +28,6 @@
 # tool around the tool to use for notarization. The tool must take 2 flags:
 #    --file
 #        - pointing at a zip file containing the artifact to notarize
-#    --primary-bundle-id
-#        - specifying the CFBundleID of the artifact being notarized
 [[ -n "${NOTARIZATION_TOOL}" ]] || die "NOTARIZATION_TOOL unset"
 
 # ARTIFACTS_DIR is a required environment variable pointing at a directory to
@@ -92,7 +90,7 @@ for ARTIFACT in "${INPUT_SYSX}" "${INPUT_APP}"; do
 
   echo "notarizing ${BN}"
   PBID=$(/usr/bin/defaults read "${ARTIFACT}/Contents/Info.plist" CFBundleIdentifier)
-  "${NOTARIZATION_TOOL}" --file "${SCRATCH}/${BN}.zip" --primary-bundle-id "${PBID}"
+  "${NOTARIZATION_TOOL}" --file "${SCRATCH}/${BN}.zip"
 done
 
 # Staple the App.
@@ -166,8 +164,7 @@ echo "verifying pkg signature"
 /usr/sbin/pkgutil --check-signature "${SCRATCH}/${RELEASE_NAME}/${RELEASE_NAME}.pkg" || die "bad pkg signature"
 
 echo "notarizing pkg"
-"${NOTARIZATION_TOOL}" --file "${SCRATCH}/${RELEASE_NAME}/${RELEASE_NAME}.pkg" \
-    --primary-bundle-id "com.google.santa"
+"${NOTARIZATION_TOOL}" --file "${SCRATCH}/${RELEASE_NAME}/${RELEASE_NAME}.pkg"
 
 echo "stapling pkg"
 /usr/bin/xcrun stapler staple "${SCRATCH}/${RELEASE_NAME}/${RELEASE_NAME}.pkg" || die "failed to staple pkg"
@@ -179,7 +176,7 @@ echo "wrapping pkg in dmg"
     -srcfolder "${SCRATCH}/${RELEASE_NAME}/" "${DMG_PATH}" || die "failed to wrap pkg in dmg"
 
 echo "notarizing dmg"
-"${NOTARIZATION_TOOL}" --file "${DMG_PATH}" --primary-bundle-id "com.google.santa"
+"${NOTARIZATION_TOOL}" --file "${DMG_PATH}"
 
 echo "stapling dmg"
 /usr/bin/xcrun stapler staple "${DMG_PATH}" || die "failed to staple dmg"

Fuzzing/BUILD

@@ -0,0 +1,11 @@
+load("fuzzing.bzl", "objc_fuzz_test")
+
+objc_fuzz_test(
+    name = "MachOParse",
+    srcs = ["common/MachOParse.mm"],
+    corpus = glob(["common/MachOParse_corpus/*"]),
+    linkopts = ["-lsqlite3"],
+    deps = [
+        "//Source/common:SNTFileInfo",
+    ],
+)

Fuzzing/common/MachOParse.mm

@@ -0,0 +1,40 @@
+#import <Foundation/Foundation.h>
+#include <libproc.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#import "Source/common/SNTFileInfo.h"
+
+int get_num_fds() {
+  return proc_pidinfo(getpid(), PROC_PIDLISTFDS, 0, NULL, 0) / PROC_PIDLISTFD_SIZE;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  static NSString *tmpPath =
+    [NSTemporaryDirectory() stringByAppendingPathComponent:[[NSUUID UUID] UUIDString]];
+
+  int num_fds_pre = get_num_fds();
+
+  @autoreleasepool {
+    NSData *input = [NSData dataWithBytesNoCopy:(void *)data length:size freeWhenDone:false];
+    [input writeToFile:tmpPath atomically:false];
+
+    NSError *error;
+    SNTFileInfo *fi = [[SNTFileInfo alloc] initWithResolvedPath:tmpPath error:&error];
+    if (!fi || error != nil) {
+      NSLog(@"Error: %@", error);
+      return -1;
+    }
+
+    // Mach-O Parsing
+    [fi architectures];
+    [fi isMissingPageZero];
+    [fi infoPlist];
+  }
+
+  if (num_fds_pre != get_num_fds()) {
+    abort();
+  }
+
+  return 0;
+}

Fuzzing/fuzzing.bzl

@@ -0,0 +1,20 @@
+"""Utilities for fuzzing Santa"""
+
+load("@rules_fuzzing//fuzzing:cc_defs.bzl", "cc_fuzz_test")
+
+def objc_fuzz_test(name, srcs, deps, corpus, linkopts = [], **kwargs):
+    native.objc_library(
+        name = "%s_lib" % name,
+        srcs = srcs,
+        deps = deps,
+        **kwargs
+    )
+
+    cc_fuzz_test(
+        name = name,
+        deps = [
+            "%s_lib" % name,
+        ],
+        linkopts = linkopts,
+        corpus = corpus,
+    )

Fuzzing/install_libclang_fuzzer.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Xcode doesn't include the fuzzer runtime, but the one LLVM ships is compatible with Apple clang.
+set -uexo pipefail
+
+CLANG_VERSION=$(clang --version | head -n 1 | cut -d' ' -f 4)
+DST_PATH="$(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/${CLANG_VERSION}/lib/darwin/libclang_rt.fuzzer_osx.a"
+
+if [ -f ${DST_PATH} ]; then
+  exit 0;
+fi
+
+curl -O -L https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}/clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin.tar.xz
+tar xvf clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin.tar.xz clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin/lib/clang/${CLANG_VERSION}/lib/darwin/libclang_rt.fuzzer_osx.a
+cp clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin/lib/clang/${CLANG_VERSION}/lib/darwin/libclang_rt.fuzzer_osx.a ${DST_PATH}

Fuzzing/libFuzzer/.gitignore

@@ -1,4 +0,0 @@
-bin
-llvm-*.src
-llvm-*.src.tar.xz
-

Fuzzing/libFuzzer/build.sh

@@ -1,109 +0,0 @@
-#!/usr/bin/env bash
-
-LLVM_VERSION='5.0.1'
-LLVM_COMPILERRT_TARBALL_NAME="llvm-${LLVM_VERSION}.src.tar.xz"
-LLVM_COMPILERRT_SRC_FOLDER_NAME=`echo "${LLVM_COMPILERRT_TARBALL_NAME}" | cut -d '.' -f 1-4`
-LLVM_COMPILERRT_TARBALL_URL="http://releases.llvm.org/${LLVM_VERSION}/${LLVM_COMPILERRT_TARBALL_NAME}"
-
-LIBFUZZER_FOLDER="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-LOG_FILE=`mktemp`
-
-main() {
-  echo "libFuzzer build script"
-
-  echo " > Checking dependencies..."
-  checkDependencies || return 1
-
-  echo " > Entering libFuzzer folder..."
-  cd "${LIBFUZZER_FOLDER}" > /dev/null 2>&1
-  if [ $? -ne 0 ] ; then
-    echo "Failed to enter the libFuzzer folder: ${LIBFUZZER_FOLDER}"
-    return 1
-  fi
-
-  if [ ! -f "${LLVM_COMPILERRT_TARBALL_NAME}" ] ; then
-    echo " > Downloading the LLVM tarball..."
-    curl "${LLVM_COMPILERRT_TARBALL_URL}" -o "${LLVM_COMPILERRT_TARBALL_NAME}" > "${LOG_FILE}" 2>&1
-    if [ $? -ne 0 ] ; then
-      dumpLogFile "Failed to download the LLVM tarball"
-      return 1
-    fi
-  else
-    echo " > An existing LLVM tarball was found"
-  fi
-
-  if [ -d "${LLVM_COMPILERRT_SRC_FOLDER_NAME}" ] ; then
-    echo " > Deleting existing LLVM folder..."
-    rm -rf "${LLVM_COMPILERRT_SRC_FOLDER_NAME}" > "${LOG_FILE}" 2>&1
-    if [ $? -ne 0 ] ; then
-      dumpLogFile "Failed to delete the existing source folder"
-      return 1
-    fi
-  fi
-
-  echo " > Extracting the LLVM tarball..."
-  tar xf "${LLVM_COMPILERRT_TARBALL_NAME}" > "${LOG_FILE}" 2>&1
-  if [ $? -ne 0 ] ; then
-    rm "${LLVM_COMPILERRT_TARBALL_NAME}" "${LLVM_COMPILERRT_SRC_FOLDER_NAME}"
-    dumpLogFile "Failed to extract the LLVM tarball"
-    return 1
-  fi
-
-  if [ -d "bin" ] ; then
-    echo " > Deleting existing bin folder..."
-    rm -rf "bin" > "${LOG_FILE}" 2>&1
-    if [ $? -ne 0 ] ; then
-      dumpLogFile "Failed to delete the existing bin folder"
-      return 1
-    fi
-  fi
-
-  mkdir "bin" > "${LOG_FILE}" 2>&1
-  if [ $? -ne 0 ] ; then
-    dumpLogFile "Failed to create the bin folder"
-    return 1
-  fi
-
-  echo " > Building libFuzzer..."
-  ( cd "bin" && "../${LLVM_COMPILERRT_SRC_FOLDER_NAME}/lib/Fuzzer/build.sh" ) > "${LOG_FILE}" 2>&1
-  if [ $? -ne 0 ] ; then
-    dumpLogFile "Failed to build the library"
-    return 1
-  fi
-
-  printf "\nFinished building libFuzzer\n"
-  rm "${LOG_FILE}"
-
-  return 0
-}
-
-checkDependencies() {
-  executable_list=( "clang++" "curl" "tar" )
-
-  for executable in "${executable_list[@]}" ; do
-    which "${executable}" > /dev/null 2>&1
-    if [ $? -ne 0 ] ; then
-      echo "The following program was not found: ${executable}"
-      return 1
-    fi
-  done
-
-  return 0
-}
-
-dumpLogFile() {
-  if [ $# -eq 1 ] ; then
-    local message="$1"
-  else
-    local message="An error has occurred"
-  fi
-
-  printf "${message}\n"
-  printf "Log file follows\n===\n"
-  cat "${LOG_FILE}"
-  printf "\n===\n"
-  rm "${LOG_FILE}"
-}
-
-main $@
-exit $?

Fuzzing/santad/src/checkCacheForVnodeID.mm

@@ -20,6 +20,7 @@
 #import "SNTCommandController.h"
 #import "SNTRule.h"
 #import "SNTXPCControlInterface.h"
+#import "Source/common/SNTCommonEnums.h"
 
 extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t *data, std::size_t size) {
   if (size > 16) {
@@ -28,7 +29,7 @@ extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t *data, std::size_t size
     return 1;
   }
 
-  santa_vnode_id_t vnodeID = {};
+  SantaVnode vnodeID = {};
   std::memcpy(&vnodeID, data, size);
 
   MOLXPCConnection *daemonConn = [SNTXPCControlInterface configuredConnection];
@@ -41,14 +42,14 @@ extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t *data, std::size_t size
 
   [[daemonConn remoteObjectProxy]
     checkCacheForVnodeID:vnodeID
-               withReply:^(santa_action_t action) {
-                 if (action == ACTION_RESPOND_ALLOW) {
+               withReply:^(SNTAction action) {
+                 if (action == SNTActionRespondAllow) {
                    std::cerr << "File exists in [whitelist] kernel cache" << std::endl;
                    ;
-                 } else if (action == ACTION_RESPOND_DENY) {
+                 } else if (action == SNTActionRespondDeny) {
                    std::cerr << "File exists in [blacklist] kernel cache" << std::endl;
                    ;
-                 } else if (action == ACTION_UNSET) {
+                 } else if (action == SNTActionUnset) {
                    std::cerr << "File does not exist in cache" << std::endl;
                    ;
                  }

LICENSE

@@ -200,3 +200,4 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+

README.md

@@ -1,10 +1,16 @@
-# Santa [![CI](https://github.com/google/santa/actions/workflows/ci.yml/badge.svg)](https://github.com/google/santa/actions/workflows/ci.yml) [![Coverage Status](https://coveralls.io/repos/github/google/santa/badge.svg?branch=main)](https://coveralls.io/github/google/santa?branch=main)
+# Santa
+
+[![license](https://img.shields.io/github/license/google/santa)](https://github.com/google/santa/blob/main/LICENSE)
+[![CI](https://github.com/google/santa/actions/workflows/ci.yml/badge.svg)](https://github.com/google/santa/actions/workflows/ci.yml)
+[![latest release](https://img.shields.io/github/v/release/google/santa.svg)](https://github.com/google/santa/releases/latest)
+[![latest release date](https://img.shields.io/github/release-date/google/santa.svg)](https://github.com/google/santa/releases/latest)
+[![downloads](https://img.shields.io/github/downloads/google/santa/latest/total)](https://github.com/google/santa/releases/latest)
 
 <p align="center">
-    <img src="https://raw.githubusercontent.com/google/santa/main/Source/santa/Resources/Images.xcassets/AppIcon.appiconset/santa-hat-icon-128.png" alt="Santa Icon" />
+    <img src="./docs/images/santa-sleigh-256.png" height="128" alt="Santa Icon" />
 </p>
 
-Santa is a binary authorization system for macOS. It consists of a system
+Santa is a binary and file access authorization system for macOS. It consists of a system
 extension that monitors for executions, a daemon that makes execution decisions
 based on the contents of a local database, a GUI agent that notifies the user in
 case of a block decision and a command-line utility for managing the system and
@@ -42,9 +48,7 @@ disclosure reporting.
   the events database. In LOCKDOWN mode, only listed binaries are allowed to
   run.
 
-* Event logging: When the kext is loaded, all binary launches are logged.  When
-  in either mode, all unknown or denied binaries are stored in the database to
-  enable later aggregation.
+* Event logging: When the system extension is loaded, all binary launches are logged. When in either mode, all unknown or denied binaries are stored in the database to enable later aggregation.
 
 * Certificate-based rules, with override levels: Instead of relying on a
   binary's hash (or 'fingerprint'), executables can be allowed/blocked by their
@@ -134,7 +138,7 @@ A tool like Santa doesn't really lend itself to screenshots, so here's a video
 instead.
 
 
-<p align="center"> <img src="https://thumbs.gfycat.com/MadFatalAmphiuma-small.gif" alt="Santa Block Video" /> </p>
+<p align="center"> <img src="./docs/images/santa-block.gif" alt="Santa Block Video" /> </p>
 
 # Contributing
 Patches to this project are very much welcome. Please see the

SECURITY.md

@@ -1,12 +1,14 @@
 # Reporting a Vulnerability
 
-If you believe you have found a security vulnerability, we would appreciate private disclosure
-so that we can work on a fix before disclosure. Any vulnerabilities reported to us will be
+If you believe you have found a security vulnerability, we would appreciate a private report
+so that we can work on and release a fix before public disclosure. Any vulnerabilities reported to us will be
 disclosed publicly either when a new version with fixes is released or 90 days has passed,
 whichever comes first.
 
-To report vulnerabilities to us privately, please e-mail `santa-team@google.com`.
-If you want to encrypt your e-mail, you can use our GPG key `0x92AFE41DAB49BBB6`
-available on pool.sks-keyservers.net:
+To report vulnerabilities to us privately, either:
 
-`gpg --keyserver pool.sks-keyservers.net --recv-key 0x92AFE41DAB49BBB6`
+1) Report the vulnerability [through GitHub](https://github.com/google/santa/security/advisories/new).
+
+2) E-mail `santa-team@google.com`. If you want to encrypt your e-mail, you can use our GPG key `0x92AFE41DAB49BBB6` available on keyserver.ubuntu.com:
+
+    `gpg --keyserver keyserver.ubuntu.com --recv-key 0x92AFE41DAB49BBB6`

Source/common/BUILD

@@ -1,5 +1,5 @@
+load("@rules_cc//cc:defs.bzl", "cc_proto_library")
 load("//:helper.bzl", "santa_unit_test")
-load("@rules_proto_grpc//objc:defs.bzl", "objc_proto_library")
 
 package(
     default_visibility = ["//:santa_package_group"],
@@ -16,26 +16,81 @@ proto_library(
     ],
 )
 
-objc_proto_library(
-    name = "santa_objc_proto",
-    copts = ["-fno-objc-arc"],
-    non_arc_srcs = ["Santa.pbobjc.m"],
-    protos = [":santa_proto"],
+cc_proto_library(
+    name = "santa_cc_proto",
+    deps = [":santa_proto"],
+)
+
+# Note: Simple wrapper for a `cc_proto_library` target which cannot be directly
+# depended upon by an `objc_library` target.
+cc_library(
+    name = "santa_cc_proto_library_wrapper",
+    hdrs = ["santa_proto_include_wrapper.h"],
+    deps = [
+        ":santa_cc_proto",
+    ],
+)
+
+objc_library(
+    name = "SystemResources",
+    srcs = ["SystemResources.mm"],
+    hdrs = ["SystemResources.h"],
+    deps = [
+        ":SNTLogging",
+    ],
 )
 
 cc_library(
     name = "SantaCache",
     hdrs = ["SantaCache.h"],
-    deps = ["//Source/common:SNTCommon"],
+    deps = [":BranchPrediction"],
 )
 
 santa_unit_test(
     name = "SantaCacheTest",
-    srcs = [
-        "SantaCache.h",
-        "SantaCacheTest.mm",
+    srcs = ["SantaCacheTest.mm"],
+    deps = [
+        ":SantaCache",
+    ],
+)
+
+objc_library(
+    name = "BranchPrediction",
+    hdrs = ["BranchPrediction.h"],
+)
+
+objc_library(
+    name = "SantaVnode",
+    hdrs = ["SantaVnode.h"],
+)
+
+objc_library(
+    name = "Platform",
+    hdrs = ["Platform.h"],
+)
+
+objc_library(
+    name = "String",
+    hdrs = ["String.h"],
+)
+
+objc_library(
+    name = "SantaVnodeHash",
+    srcs = ["SantaVnodeHash.mm"],
+    hdrs = ["SantaVnodeHash.h"],
+    deps = [
+        ":SantaCache",
+        ":SantaVnode",
+    ],
+)
+
+objc_library(
+    name = "CertificateHelpers",
+    srcs = ["CertificateHelpers.m"],
+    hdrs = ["CertificateHelpers.h"],
+    deps = [
+        "@MOLCertificate",
     ],
-    deps = ["//Source/common:SNTCommon"],
 )
 
 objc_library(
@@ -44,6 +99,7 @@ objc_library(
     hdrs = ["SNTBlockMessage.h"],
     deps = [
         ":SNTConfigurator",
+        ":SNTFileAccessEvent",
         ":SNTLogging",
         ":SNTStoredEvent",
         ":SNTSystemInfo",
@@ -57,7 +113,7 @@ objc_library(
     defines = ["SANTAGUI"],
     deps = [
         ":SNTConfigurator",
-        ":SNTDeviceEvent",
+        ":SNTFileAccessEvent",
         ":SNTLogging",
         ":SNTStoredEvent",
         ":SNTSystemInfo",
@@ -66,11 +122,11 @@ objc_library(
 
 objc_library(
     name = "SNTCachedDecision",
-    srcs = ["SNTCachedDecision.m"],
+    srcs = ["SNTCachedDecision.mm"],
     hdrs = ["SNTCachedDecision.h"],
     deps = [
-        ":SNTCommon",
         ":SNTCommonEnums",
+        ":SantaVnode",
     ],
 )
 
@@ -78,26 +134,42 @@ objc_library(
     name = "SNTDeviceEvent",
     srcs = ["SNTDeviceEvent.m"],
     hdrs = ["SNTDeviceEvent.h"],
+    module_name = "santa_common_SNTDeviceEvent",
+    sdk_frameworks = [
+        "Foundation",
+    ],
     deps = [
         ":SNTCommonEnums",
     ],
 )
 
 objc_library(
-    name = "SNTAllowlistInfo",
-    srcs = ["SNTAllowlistInfo.m"],
-    hdrs = ["SNTAllowlistInfo.h"],
+    name = "SNTFileAccessEvent",
+    srcs = ["SNTFileAccessEvent.m"],
+    hdrs = ["SNTFileAccessEvent.h"],
+    module_name = "santa_common_SNTFileAccessEvent",
+    sdk_frameworks = [
+        "Foundation",
+    ],
+    deps = [
+        ":CertificateHelpers",
+        "@MOLCertificate",
+    ],
 )
 
 objc_library(
     name = "SNTCommonEnums",
-    hdrs = ["SNTCommonEnums.h"],
+    textual_hdrs = ["SNTCommonEnums.h"],
 )
 
 objc_library(
     name = "SNTConfigurator",
     srcs = ["SNTConfigurator.m"],
     hdrs = ["SNTConfigurator.h"],
+    module_name = "santa_common_SNTConfigurator",
+    sdk_frameworks = [
+        "Foundation",
+    ],
     deps = [
         ":SNTCommonEnums",
         ":SNTRule",
@@ -106,6 +178,23 @@ objc_library(
     ],
 )
 
+objc_library(
+    name = "SNTKVOManager",
+    srcs = ["SNTKVOManager.mm"],
+    hdrs = ["SNTKVOManager.h"],
+    deps = [
+        ":SNTLogging",
+    ],
+)
+
+santa_unit_test(
+    name = "SNTKVOManagerTest",
+    srcs = ["SNTKVOManagerTest.mm"],
+    deps = [
+        ":SNTKVOManager",
+    ],
+)
+
 objc_library(
     name = "SNTDropRootPrivs",
     srcs = ["SNTDropRootPrivs.m"],
@@ -117,20 +206,12 @@ objc_library(
     srcs = ["SNTFileInfo.m"],
     hdrs = ["SNTFileInfo.h"],
     deps = [
+        ":SNTLogging",
         "@FMDB",
         "@MOLCodesignChecker",
     ],
 )
 
-cc_library(
-    name = "SNTCommon",
-    hdrs = ["SNTCommon.h"],
-    defines = [
-        "TARGET_OS_OSX",
-        "TARGET_OS_MAC",
-    ],
-)
-
 objc_library(
     name = "SNTLogging",
     srcs = ["SNTLogging.m"],
@@ -138,18 +219,27 @@ objc_library(
     deps = [":SNTConfigurator"],
 )
 
-cc_library(
-    name = "SNTPrefixTree",
-    srcs = ["SNTPrefixTree.cc"],
-    hdrs = ["SNTPrefixTree.h"],
-    copts = ["-std=c++11"],
-    deps = [":SNTLogging"],
+objc_library(
+    name = "PrefixTree",
+    hdrs = ["PrefixTree.h"],
+    deps = [
+        ":SNTLogging",
+        "@com_google_absl//absl/synchronization",
+    ],
+)
+
+objc_library(
+    name = "Unit",
+    hdrs = ["Unit.h"],
 )
 
 objc_library(
     name = "SNTRule",
     srcs = ["SNTRule.m"],
     hdrs = ["SNTRule.h"],
+    sdk_frameworks = [
+        "Foundation",
+    ],
     deps = [
         ":SNTCommonEnums",
         ":SNTSyncConstants",
@@ -159,7 +249,11 @@ objc_library(
 santa_unit_test(
     name = "SNTRuleTest",
     srcs = ["SNTRuleTest.m"],
-    deps = [":SNTRule"],
+    deps = [
+        ":SNTCommonEnums",
+        ":SNTRule",
+        ":SNTSyncConstants",
+    ],
 )
 
 objc_library(
@@ -181,13 +275,19 @@ objc_library(
     name = "SNTSyncConstants",
     srcs = ["SNTSyncConstants.m"],
     hdrs = ["SNTSyncConstants.h"],
+    sdk_frameworks = [
+        "Foundation",
+    ],
 )
 
 objc_library(
     name = "SNTSystemInfo",
     srcs = ["SNTSystemInfo.m"],
     hdrs = ["SNTSystemInfo.h"],
-    sdk_frameworks = ["IOKit"],
+    sdk_frameworks = [
+        "Foundation",
+        "IOKit",
+    ],
 )
 
 objc_library(
@@ -261,11 +361,11 @@ objc_library(
     srcs = ["SNTXPCUnprivilegedControlInterface.m"],
     hdrs = ["SNTXPCUnprivilegedControlInterface.h"],
     deps = [
-        ":SNTCommon",
         ":SNTCommonEnums",
         ":SNTRule",
         ":SNTStoredEvent",
         ":SNTXPCBundleServiceInterface",
+        ":SantaVnode",
         "@MOLCertificate",
         "@MOLXPCConnection",
     ],
@@ -287,9 +387,9 @@ santa_unit_test(
 )
 
 santa_unit_test(
-    name = "SNTPrefixTreeTest",
-    srcs = ["SNTPrefixTreeTest.mm"],
-    deps = [":SNTPrefixTree"],
+    name = "PrefixTreeTest",
+    srcs = ["PrefixTreeTest.mm"],
+    deps = [":PrefixTree"],
 )
 
 santa_unit_test(
@@ -298,13 +398,55 @@ santa_unit_test(
     deps = [":SNTMetricSet"],
 )
 
+santa_unit_test(
+    name = "SNTCachedDecisionTest",
+    srcs = ["SNTCachedDecisionTest.mm"],
+    deps = [
+        "//Source/common:SNTCachedDecision",
+        "//Source/common:TestUtils",
+        "@OCMock",
+    ],
+)
+
+santa_unit_test(
+    name = "SNTBlockMessageTest",
+    srcs = ["SNTBlockMessageTest.m"],
+    deps = [
+        ":SNTBlockMessage",
+        ":SNTConfigurator",
+        ":SNTFileAccessEvent",
+        ":SNTStoredEvent",
+        ":SNTSystemInfo",
+        "@OCMock",
+    ],
+)
+
 test_suite(
     name = "unit_tests",
     tests = [
+        ":PrefixTreeTest",
+        ":SNTBlockMessageTest",
+        ":SNTCachedDecisionTest",
         ":SNTFileInfoTest",
+        ":SNTKVOManagerTest",
         ":SNTMetricSetTest",
-        ":SNTPrefixTreeTest",
+        ":SNTRuleTest",
         ":SantaCacheTest",
     ],
     visibility = ["//:santa_package_group"],
 )
+
+objc_library(
+    name = "TestUtils",
+    testonly = 1,
+    srcs = ["TestUtils.mm"],
+    hdrs = ["TestUtils.h"],
+    sdk_dylibs = [
+        "bsm",
+    ],
+    deps = [
+        ":SystemResources",
+        "@OCMock",
+        "@com_google_googletest//:gtest",
+    ],
+)

Source/common/BranchPrediction.h

@@ -0,0 +1,22 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__BRANCHPREDICTION_H
+#define SANTA__COMMON__BRANCHPREDICTION_H
+
+// Helpful macros to use when the the outcome is largely known
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+#endif

Source/common/CertificateHelpers.h

@@ -0,0 +1,43 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <Foundation/Foundation.h>
+#import <MOLCertificate/MOLCertificate.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/**
+  Return a string representing publisher info from the provided certs
+
+  @param certs A certificate chain
+  @param teamID A team ID to be displayed for apps from the App Store
+
+  @return A string that tries to be more helpful to users by extracting
+  appropriate information from the certificate chain.
+*/
+NSString *Publisher(NSArray<MOLCertificate *> *certs, NSString *teamID);
+
+/**
+  Return an array of the underlying SecCertificateRef's for the given array
+  of MOLCertificates.
+
+  @param certs An array of MOLCertificates
+
+  @return An array of SecCertificateRefs. WARNING: If the refs need to be used
+  for a long time be careful to properly CFRetain/CFRelease the returned items.
+*/
+NSArray<id> *CertificateChain(NSArray<MOLCertificate *> *certs);
+
+__END_DECLS

Source/common/CertificateHelpers.m

@@ -0,0 +1,42 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import "Source/common/CertificateHelpers.h"
+
+#include <Security/SecCertificate.h>
+
+NSString *Publisher(NSArray<MOLCertificate *> *certs, NSString *teamID) {
+  MOLCertificate *leafCert = [certs firstObject];
+
+  if ([leafCert.commonName isEqualToString:@"Apple Mac OS Application Signing"]) {
+    return [NSString stringWithFormat:@"App Store (Team ID: %@)", teamID];
+  } else if (leafCert.commonName && leafCert.orgName) {
+    return [NSString stringWithFormat:@"%@ - %@", leafCert.orgName, leafCert.commonName];
+  } else if (leafCert.commonName) {
+    return leafCert.commonName;
+  } else if (leafCert.orgName) {
+    return leafCert.orgName;
+  } else {
+    return nil;
+  }
+}
+
+NSArray<id> *CertificateChain(NSArray<MOLCertificate *> *certs) {
+  NSMutableArray *certArray = [NSMutableArray arrayWithCapacity:[certs count]];
+  for (MOLCertificate *cert in certs) {
+    [certArray addObject:(id)cert.certRef];
+  }
+
+  return certArray;
+}

Source/common/Platform.h

@@ -0,0 +1,34 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__PLATFORM_H
+#define SANTA__COMMON__PLATFORM_H
+
+#include <Availability.h>
+
+#if defined(MAC_OS_VERSION_12_0) && \
+    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_12_0
+#define HAVE_MACOS_12 1
+#else
+#define HAVE_MACOS_12 0
+#endif
+
+#if defined(MAC_OS_VERSION_13_0) && \
+    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_13_0
+#define HAVE_MACOS_13 1
+#else
+#define HAVE_MACOS_13 0
+#endif
+
+#endif

Source/common/PrefixTree.h

@@ -0,0 +1,302 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__PREFIXTREE_H
+#define SANTA__COMMON__PREFIXTREE_H
+
+#include <sys/syslimits.h>
+
+#include <optional>
+
+#import "Source/common/SNTLogging.h"
+#include "absl/synchronization/mutex.h"
+
+#if SANTA_PREFIX_TREE_DEBUG
+#define DEBUG_LOG LOGD
+#else
+#define DEBUG_LOG(format, ...)  // NOP
+#endif
+
+namespace santa::common {
+
+template <typename ValueT>
+class PrefixTree {
+ private:
+  // Forward declaration
+  enum class NodeType;
+  class TreeNode;
+
+ public:
+  PrefixTree(uint32_t max_depth = PATH_MAX)
+      : root_(new TreeNode()), max_depth_(max_depth), node_count_(0) {}
+
+  ~PrefixTree() { PruneLocked(root_); }
+
+  bool InsertPrefix(const char *s, ValueT value) {
+    absl::MutexLock lock(&lock_);
+    return InsertLocked(s, value, NodeType::kPrefix);
+  }
+
+  bool InsertLiteral(const char *s, ValueT value) {
+    absl::MutexLock lock(&lock_);
+    return InsertLocked(s, value, NodeType::kLiteral);
+  }
+
+  bool HasPrefix(const char *input) {
+    absl::ReaderMutexLock lock(&lock_);
+    return HasPrefixLocked(input);
+  }
+
+  std::optional<ValueT> LookupLongestMatchingPrefix(const char *input) {
+    if (!input) {
+      return std::nullopt;
+    }
+
+    absl::ReaderMutexLock lock(&lock_);
+    return LookupLongestMatchingPrefixLocked(input);
+  }
+
+  void Reset() {
+    absl::MutexLock lock(&lock_);
+    PruneLocked(root_);
+    root_ = new TreeNode();
+    node_count_ = 0;
+  }
+
+#if SANTA_PREFIX_TREE_DEBUG
+  void Print() {
+    char buf[max_depth_ + 1];
+    memset(buf, 0, sizeof(buf));
+
+    absl::ReaderMutexLock lock(&lock_);
+    PrintLocked(root_, buf, 0);
+  }
+
+  uint32_t NodeCount() {
+    absl::ReaderMutexLock lock(&lock_);
+    return node_count_;
+  }
+#endif
+
+ private:
+  ABSL_EXCLUSIVE_LOCKS_REQUIRED(lock_)
+  bool InsertLocked(const char *input, ValueT value, NodeType node_type) {
+    const char *p = input;
+    TreeNode *node = root_;
+
+    while (*p) {
+      uint8_t cur_byte = (uint8_t)*p;
+
+      TreeNode *child_node = node->children_[cur_byte];
+      if (!child_node) {
+        // Current node doesn't exist...
+        // Create the rest of the nodes in the tree for the given string
+
+        // Keep a pointer to where this new branch starts from. If the
+        // input length exceeds max_depth, the new branch will need to
+        // be pruned.
+        TreeNode *branch_start_node = node;
+        uint8_t branch_start_byte = (uint8_t)*p;
+
+        do {
+          TreeNode *new_node = new TreeNode();
+          node->children_[cur_byte] = new_node;
+          node = new_node;
+          node_count_++;
+
+          // Check current depth...
+          if (p - input >= max_depth_) {
+            // Attempted to add a string that exceeded max depth
+            // Prune tree from start of this new branch
+            PruneLocked(branch_start_node->children_[branch_start_byte]);
+            branch_start_node->children_[branch_start_byte] = nullptr;
+
+            return false;
+          }
+
+          cur_byte = (uint8_t) * ++p;
+        } while (*p);
+
+        node->node_type_ = node_type;
+        node->value_ = value;
+
+        return true;
+      } else if (*(p + 1) == '\0') {
+        // Current node exists and we're at the end of our input...
+        // Note: The current node's data will be overwritten
+
+        // Only increment node count if the previous node type wasn't already a
+        // prefix or literal type (in which case it was already counted)
+        if (child_node->node_type_ == NodeType::kInner) {
+          node_count_++;
+        }
+
+        child_node->node_type_ = node_type;
+        child_node->value_ = value;
+        return true;
+      }
+
+      node = child_node;
+      p++;
+    }
+
+    // Should only get here when input is an empty string
+    return false;
+  }
+
+  ABSL_SHARED_LOCKS_REQUIRED(lock_)
+  bool HasPrefixLocked(const char *input) {
+    TreeNode *node = root_;
+    const char *p = input;
+
+    while (*p) {
+      node = node->children_[(uint8_t)*p++];
+
+      if (!node) {
+        break;
+      }
+
+      if (node->node_type_ == NodeType::kPrefix ||
+          (*p == '\0' && node->node_type_ == NodeType::kLiteral)) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  ABSL_SHARED_LOCKS_REQUIRED(lock_)
+  std::optional<ValueT> LookupLongestMatchingPrefixLocked(const char *input) {
+    TreeNode *node = root_;
+    TreeNode *match = nullptr;
+    const char *p = input;
+
+    while (*p) {
+      node = node->children_[(uint8_t)*p++];
+
+      if (!node) {
+        break;
+      }
+
+      if (node->node_type_ == NodeType::kPrefix ||
+          (*p == '\0' && node->node_type_ == NodeType::kLiteral)) {
+        match = node;
+      }
+    }
+
+    return match ? std::make_optional<ValueT>(match->value_) : std::nullopt;
+  }
+
+  ABSL_EXCLUSIVE_LOCKS_REQUIRED(lock_)
+  void PruneLocked(TreeNode *target) {
+    if (!target) {
+      return;
+    }
+
+    // For deep trees, a recursive approach will generate too many stack frames.
+    // Since the depth of the tree is configurable, err on the side of caution
+    // and use a "stack" to walk the tree in a non-recursive manner.
+    TreeNode **stack = new TreeNode *[node_count_ + 1];
+    if (!stack) {
+      LOGE(@"Unable to prune tree!");
+      return;
+    }
+
+    uint32_t count = 0;
+
+    // Seed the "stack" with a starting node.
+    stack[count++] = target;
+
+    // Start at the target node and walk the tree to find and delete all the
+    // sub-nodes.
+    while (count) {
+      TreeNode *node = stack[--count];
+
+      for (int i = 0; i < 256; ++i) {
+        if (!node->children_[i]) {
+          continue;
+        }
+        stack[count++] = node->children_[i];
+      }
+
+      delete node;
+      --node_count_;
+    }
+
+    delete[] stack;
+  }
+
+#if SANTA_PREFIX_TREE_DEBUG
+  ABSL_SHARED_LOCKS_REQUIRED(lock_)
+  void PrintLocked(TreeNode *node, char *buf, uint32_t depth) {
+    for (size_t i = 0; i < 256; i++) {
+      TreeNode *cur_node = node->children_[i];
+      if (cur_node) {
+        buf[depth] = i;
+        if (cur_node->node_type_ != NodeType::kInner) {
+          printf("\t%s (type: %s)\n", buf,
+                 cur_node->node_type_ == NodeType::kPrefix ? "prefix" : "literal");
+        }
+        PrintLocked(cur_node, buf, depth + 1);
+        buf[depth] = '\0';
+      }
+    }
+  }
+#endif
+
+  enum class NodeType {
+    kInner = 0,
+    kPrefix,
+    kLiteral,
+  };
+
+  ///
+  ///  TreeNode is a wrapper class that represents one byte.
+  ///  1 node can represent a whole ASCII character.
+  ///  For example a pointer to the 'A' node will be stored at children[0x41].
+  ///  It takes 1-4 nodes to represent a UTF-8 encoded Unicode character.
+  ///
+  ///  The path for "/🤘" would look like this:
+  ///      children[0x2f] -> children[0xf0] -> children[0x9f] -> children[0xa4]
+  ///      -> children[0x98]
+  ///
+  ///  The path for "/dev" is:
+  ///      children[0x2f] -> children[0x64] -> children[0x65] -> children[0x76]
+  ///
+  ///  Lookups of children are O(1).
+  ///
+  ///  Having the nodes represented by a smaller width, such as a nibble (1/2
+  ///  byte), would drastically decrease the memory footprint but would double
+  ///  required dereferences.
+  ///
+  ///  TODO(bur): Potentially convert this into a full on radix tree.
+  ///
+  class TreeNode {
+   public:
+    TreeNode() : children_(), node_type_(NodeType::kInner) {}
+    ~TreeNode() = default;
+    TreeNode *children_[256];
+    PrefixTree::NodeType node_type_;
+    ValueT value_;
+  };
+
+  TreeNode *root_;
+  const uint32_t max_depth_;
+  uint32_t node_count_ ABSL_GUARDED_BY(lock_);
+  absl::Mutex lock_;
+};
+
+}  // namespace santa::common
+
+#endif

Source/common/PrefixTreeTest.mm

@@ -0,0 +1,224 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <XCTest/XCTest.h>
+
+#define SANTA_PREFIX_TREE_DEBUG 1
+#include "Source/common/PrefixTree.h"
+
+using santa::common::PrefixTree;
+
+@interface PrefixTreeTest : XCTestCase
+@end
+
+@implementation PrefixTreeTest
+
+- (void)testBasic {
+  PrefixTree<int> tree;
+
+  XCTAssertFalse(tree.HasPrefix("/foo/bar/baz"));
+  XCTAssertFalse(tree.HasPrefix("/foo/bar.txt"));
+  XCTAssertFalse(tree.HasPrefix("/baz"));
+
+  XCTAssertTrue(tree.InsertPrefix("/foo", 12));
+  XCTAssertTrue(tree.InsertPrefix("/bar", 34));
+  XCTAssertTrue(tree.InsertLiteral("/foo/bar", 56));
+
+  // Re-inserting something that exists is allowed
+  XCTAssertTrue(tree.InsertLiteral("/foo", 78));
+  XCTAssertTrue(tree.InsertPrefix("/foo", 56));
+
+  XCTAssertTrue(tree.HasPrefix("/foo/bar/baz"));
+  XCTAssertTrue(tree.HasPrefix("/foo/bar.txt"));
+  XCTAssertFalse(tree.HasPrefix("/baz"));
+
+  // Empty strings are not supported
+  XCTAssertFalse(tree.InsertLiteral("", 0));
+  XCTAssertFalse(tree.InsertPrefix("", 0));
+}
+
+- (void)testHasPrefix {
+  PrefixTree<int> tree;
+
+  XCTAssertTrue(tree.InsertPrefix("/foo", 0));
+  XCTAssertTrue(tree.InsertLiteral("/bar", 0));
+  XCTAssertTrue(tree.InsertLiteral("/baz", 0));
+  XCTAssertTrue(tree.InsertLiteral("/qaz", 0));
+
+  // Check that a tree with a matching prefix is successful
+  XCTAssertTrue(tree.HasPrefix("/foo.txt"));
+
+  // This shouldn't succeed because `/bar` `/baz` and `qaz` are literals
+  XCTAssertFalse(tree.HasPrefix("/bar.txt"));
+  XCTAssertFalse(tree.HasPrefix("/baz.txt"));
+  XCTAssertFalse(tree.HasPrefix("/qaz.txt"));
+
+  // Now change `/bar` to a prefix type and retest HasPrefix
+  // `/bar.txt` should now succeed, but `/baz.txt` should still not pass
+  XCTAssertTrue(tree.InsertPrefix("/bar", 0));
+  XCTAssertTrue(tree.HasPrefix("/bar.txt"));
+  XCTAssertFalse(tree.HasPrefix("/baz.txt"));
+  XCTAssertFalse(tree.HasPrefix("/qaz.txt"));
+
+  // Insert a new prefix string to allow `/baz.txt` to have a valid prefix
+  XCTAssertTrue(tree.InsertPrefix("/b", 0));
+  XCTAssertTrue(tree.HasPrefix("/baz.txt"));
+  XCTAssertFalse(tree.HasPrefix("/qaz.txt"));
+
+  // An exact match on a literal allows HasPrefix to succeed
+  XCTAssertTrue(tree.InsertLiteral("/qaz.txt", 0));
+  XCTAssertTrue(tree.HasPrefix("/qaz.txt"));
+}
+
+- (void)testLookupLongestMatchingPrefix {
+  PrefixTree<int> tree;
+
+  XCTAssertTrue(tree.InsertPrefix("/foo", 12));
+  XCTAssertTrue(tree.InsertPrefix("/bar", 34));
+  XCTAssertTrue(tree.InsertPrefix("/foo/bar.txt", 56));
+
+  std::optional<int> value;
+
+  // Matching exact prefix
+  value = tree.LookupLongestMatchingPrefix("/foo");
+  XCTAssertEqual(value.value_or(0), 12);
+
+  // Ensure changing node type works as expected
+  // Literals must match exactly.
+  value = tree.LookupLongestMatchingPrefix("/foo/bar.txt.tmp");
+  XCTAssertEqual(value.value_or(0), 56);
+  XCTAssertTrue(tree.InsertLiteral("/foo/bar.txt", 90));
+  value = tree.LookupLongestMatchingPrefix("/foo/bar.txt.tmp");
+  XCTAssertEqual(value.value_or(0), 12);
+
+  // Inserting over an exiting node returns the new value
+  XCTAssertTrue(tree.InsertPrefix("/foo", 78));
+  value = tree.LookupLongestMatchingPrefix("/foo");
+  XCTAssertEqual(value.value_or(0), 78);
+
+  // No matching prefix
+  value = tree.LookupLongestMatchingPrefix("/asdf");
+  XCTAssertEqual(value.value_or(0), 0);
+}
+
+- (void)testNodeCounts {
+  const uint32_t maxDepth = 100;
+  PrefixTree<int> tree(100);
+
+  XCTAssertEqual(tree.NodeCount(), 0);
+
+  // Start with a small string
+  XCTAssertTrue(tree.InsertPrefix("asdf", 0));
+  XCTAssertEqual(tree.NodeCount(), 4);
+
+  // Add a couple more characters to the existing string
+  XCTAssertTrue(tree.InsertPrefix("asdfgh", 0));
+  XCTAssertEqual(tree.NodeCount(), 6);
+
+  // Inserting a string that exceeds max depth doesn't increase node count
+  XCTAssertFalse(tree.InsertPrefix(std::string(maxDepth + 10, 'A').c_str(), 0));
+  XCTAssertEqual(tree.NodeCount(), 6);
+
+  // Add a new string that is a prefix of an existing string
+  // This should increment the count by one since a new terminal node exists
+  XCTAssertTrue(tree.InsertPrefix("as", 0));
+  XCTAssertEqual(tree.NodeCount(), 7);
+
+  // Re-inserting onto an existing node shouldn't modify the count
+  tree.InsertLiteral("as", 0);
+  tree.InsertPrefix("as", 0);
+  XCTAssertEqual(tree.NodeCount(), 7);
+}
+
+- (void)testReset {
+  // Ensure resetting a tree removes all content
+  PrefixTree<int> tree;
+
+  tree.Reset();
+  XCTAssertEqual(tree.NodeCount(), 0);
+
+  XCTAssertTrue(tree.InsertPrefix("asdf", 0));
+  XCTAssertTrue(tree.InsertPrefix("qwerty", 0));
+
+  XCTAssertTrue(tree.HasPrefix("asdf"));
+  XCTAssertTrue(tree.HasPrefix("qwerty"));
+  XCTAssertEqual(tree.NodeCount(), 10);
+
+  tree.Reset();
+  XCTAssertFalse(tree.HasPrefix("asdf"));
+  XCTAssertFalse(tree.HasPrefix("qwerty"));
+  XCTAssertEqual(tree.NodeCount(), 0);
+}
+
+- (void)testComplexValues {
+  class Foo {
+   public:
+    Foo(int x) : x_(x) {}
+    int X() { return x_; }
+
+   private:
+    int x_;
+  };
+
+  PrefixTree<std::shared_ptr<Foo>> tree;
+
+  XCTAssertTrue(tree.InsertPrefix("foo", std::make_shared<Foo>(123)));
+  XCTAssertTrue(tree.InsertPrefix("bar", std::make_shared<Foo>(456)));
+
+  std::optional<std::shared_ptr<Foo>> value;
+  value = tree.LookupLongestMatchingPrefix("foo");
+  XCTAssertTrue(value.has_value() && value->get()->X() == 123);
+
+  value = tree.LookupLongestMatchingPrefix("bar");
+  XCTAssertTrue(value.has_value() && value->get()->X() == 456);
+
+  value = tree.LookupLongestMatchingPrefix("asdf");
+  XCTAssertFalse(value.has_value());
+}
+
+- (void)testThreading {
+  uint32_t count = 4096;
+  auto t = new PrefixTree<int>(count * (uint32_t)[NSUUID UUID].UUIDString.length);
+
+  __block NSMutableArray *UUIDs = [NSMutableArray arrayWithCapacity:count];
+  for (int i = 0; i < count; ++i) {
+    [UUIDs addObject:[NSUUID UUID].UUIDString];
+  }
+
+  __block _Atomic BOOL stop = NO;
+
+  // Create a bunch of background noise.
+  dispatch_async(dispatch_get_global_queue(0, 0), ^{
+    for (uint64_t i = 0; i < UINT64_MAX; ++i) {
+      dispatch_async(dispatch_get_global_queue(0, 0), ^{
+        t->HasPrefix([UUIDs[i % count] UTF8String]);
+      });
+      if (stop) return;
+    }
+  });
+
+  // Fill up the tree.
+  dispatch_apply(count, dispatch_get_global_queue(0, 0), ^(size_t i) {
+    XCTAssertEqual(t->InsertPrefix([UUIDs[i] UTF8String], 0), true);
+  });
+
+  // Make sure every leaf byte is found.
+  dispatch_apply(count, dispatch_get_global_queue(0, 0), ^(size_t i) {
+    XCTAssertTrue(t->HasPrefix([UUIDs[i] UTF8String]));
+  });
+
+  stop = YES;
+}
+
+@end

Source/common/SNTAllowlistInfo.m

@@ -1,32 +0,0 @@
-/// Copyright 2021 Google Inc. All rights reserved.
-///
-/// Licensed under the Apache License, Version 2.0 (the "License");
-/// you may not use this file except in compliance with the License.
-/// You may obtain a copy of the License at
-///
-///    http://www.apache.org/licenses/LICENSE-2.0
-///
-///    Unless required by applicable law or agreed to in writing, software
-///    distributed under the License is distributed on an "AS IS" BASIS,
-///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-///    See the License for the specific language governing permissions and
-///    limitations under the License.
-
-#import "Source/common/SNTAllowlistInfo.h"
-
-@implementation SNTAllowlistInfo
-
-- (instancetype)initWithPid:(pid_t)pid
-                 pidversion:(int)pidver
-                 targetPath:(NSString *)targetPath
-                     sha256:(NSString *)hash {
-  self = [super init];
-  if (self) {
-    _pid = pid;
-    _pidversion = pidver;
-    _targetPath = targetPath;
-    _sha256 = hash;
-  }
-  return self;
-}
-@end

Source/common/SNTBlockMessage.h

@@ -18,6 +18,9 @@
 #import <Foundation/Foundation.h>
 #endif
 
+#import "Source/common/SNTFileAccessEvent.h"
+#import "Source/common/SNTStoredEvent.h"
+
 @class SNTStoredEvent;
 
 @interface SNTBlockMessage : NSObject
@@ -38,11 +41,15 @@
 + (NSAttributedString *)attributedBlockMessageForEvent:(SNTStoredEvent *)event
                                          customMessage:(NSString *)customMessage;
 
++ (NSAttributedString *)attributedBlockMessageForFileAccessEvent:(SNTFileAccessEvent *)event
+                                                   customMessage:(NSString *)customMessage;
+
 ///
 ///  Return a URL generated from the EventDetailURL configuration key
 ///  after replacing templates in the URL with values from the event.
 ///
-+ (NSURL *)eventDetailURLForEvent:(SNTStoredEvent *)event;
++ (NSURL *)eventDetailURLForEvent:(SNTStoredEvent *)event customURL:(NSString *)url;
++ (NSURL *)eventDetailURLForFileAccessEvent:(SNTFileAccessEvent *)event customURL:(NSString *)url;
 
 ///
 ///  Strip HTML from a string, replacing <br /> with newline.

Source/common/SNTBlockMessage.m

@@ -15,6 +15,7 @@
 #import "Source/common/SNTBlockMessage.h"
 
 #import "Source/common/SNTConfigurator.h"
+#import "Source/common/SNTFileAccessEvent.h"
 #import "Source/common/SNTLogging.h"
 #import "Source/common/SNTStoredEvent.h"
 #import "Source/common/SNTSystemInfo.h"
@@ -82,6 +83,18 @@
   return [SNTBlockMessage formatMessage:message];
 }
 
++ (NSAttributedString *)attributedBlockMessageForFileAccessEvent:(SNTFileAccessEvent *)event
+                                                   customMessage:(NSString *)customMessage {
+  NSString *message = customMessage;
+  if (!message.length) {
+    message = [[SNTConfigurator configurator] fileAccessBlockMessage];
+    if (!message.length) {
+      message = @"Access to a file has been denied.";
+    }
+  }
+  return [SNTBlockMessage formatMessage:message];
+}
+
 + (NSString *)stringFromHTML:(NSString *)html {
   NSError *error;
   NSXMLDocument *xml = [[NSXMLDocument alloc] initWithXMLString:html options:0 error:&error];
@@ -109,46 +122,127 @@
   return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
 }
 
-+ (NSURL *)eventDetailURLForEvent:(SNTStoredEvent *)event {
++ (NSString *)replaceFormatString:(NSString *)str
+                         withDict:(NSDictionary<NSString *, NSString * (^)()> *)replacements {
+  __block NSString *formatStr = str;
+
+  [replacements
+    enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString * (^computeValue)(), BOOL *stop) {
+      NSString *value = computeValue();
+      if (value) {
+        formatStr = [formatStr stringByReplacingOccurrencesOfString:key withString:value];
+      }
+    }];
+
+  return formatStr;
+}
+
+// Returns either the generated URL for the passed in event, or an NSURL from the passed in custom
+// URL string. If the custom URL string is the string "null", nil will be returned. If no custom
+// URL is passed and there is no configured EventDetailURL template, nil will be returned.
+// The following "format strings" will be replaced in the URL, if they are present:
+//
+//   %file_identifier%           - The SHA-256 of the binary being executed.
+//   %bundle_or_file_identifier% - The hash of the bundle containing this file or the file itself,
+//                                 if no bundle hash is present.
+//   %username%                  - The executing user's name.
+//   %machine_id%                - The configured machine ID for this host.
+//   %hostname%                  - The machine's FQDN.
+//   %uuid%                      - The machine's UUID.
+//   %serial%                    - The machine's serial number.
+//
++ (NSURL *)eventDetailURLForEvent:(SNTStoredEvent *)event customURL:(NSString *)url {
   SNTConfigurator *config = [SNTConfigurator configurator];
 
-  NSString *hostname = [SNTSystemInfo longHostname];
-  NSString *uuid = [SNTSystemInfo hardwareUUID];
-  NSString *serial = [SNTSystemInfo serialNumber];
-  NSString *formatStr = config.eventDetailURL;
-  if (!formatStr.length) return nil;
-
-  if (event.fileSHA256) {
-    // This key is deprecated, use %file_identifier% or %bundle_or_file_identifier%
-    formatStr =
-      [formatStr stringByReplacingOccurrencesOfString:@"%file_sha%"
-                                           withString:event.fileBundleHash ?: event.fileSHA256];
-
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%file_identifier%"
-                                                     withString:event.fileSHA256];
-    formatStr =
-      [formatStr stringByReplacingOccurrencesOfString:@"%bundle_or_file_identifier%"
-                                           withString:event.fileBundleHash ?: event.fileSHA256];
-  }
-  if (event.executingUser) {
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%username%"
-                                                     withString:event.executingUser];
-  }
-  if (config.machineID) {
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%machine_id%"
-                                                     withString:config.machineID];
-  }
-  if (hostname.length) {
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%hostname%" withString:hostname];
-  }
-  if (uuid.length) {
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%uuid%" withString:uuid];
-  }
-  if (serial.length) {
-    formatStr = [formatStr stringByReplacingOccurrencesOfString:@"%serial%" withString:serial];
+  NSString *formatStr = url;
+  if (!formatStr.length) {
+    formatStr = config.eventDetailURL;
+    if (!formatStr.length) {
+      return nil;
+    }
   }
 
-  return [NSURL URLWithString:formatStr];
+  if ([formatStr isEqualToString:@"null"]) {
+    return nil;
+  }
+
+  // Disabling clang-format. See comment in `eventDetailURLForFileAccessEvent:customURL:`
+  // clang-format off
+  NSDictionary<NSString *, NSString * (^)()> *kvReplacements =
+    [NSDictionary dictionaryWithObjectsAndKeys:
+      // This key is deprecated, use %file_identifier% or %bundle_or_file_identifier%
+      ^{ return event.fileSHA256 ? event.fileBundleHash ?: event.fileSHA256 : nil; },
+                                                 @"%file_sha%",
+      ^{ return event.fileSHA256; },             @"%file_identifier%",
+      ^{ return event.fileSHA256 ? event.fileBundleHash ?: event.fileSHA256 : nil; },
+                                                 @"%bundle_or_file_identifier%",
+      ^{ return event.executingUser; },          @"%username%",
+      ^{ return config.machineID; },             @"%machine_id%",
+      ^{ return [SNTSystemInfo longHostname]; }, @"%hostname%",
+      ^{ return [SNTSystemInfo hardwareUUID]; }, @"%uuid%",
+      ^{ return [SNTSystemInfo serialNumber]; }, @"%serial%",
+      nil];
+  // clang-format on
+
+  formatStr = [SNTBlockMessage replaceFormatString:formatStr withDict:kvReplacements];
+
+  NSURL *u = [NSURL URLWithString:formatStr];
+  if (!u) {
+    LOGW(@"Unable to generate event detail URL for string '%@'", formatStr);
+  }
+
+  return u;
+}
+
+// Returns either the generated URL for the passed in event, or an NSURL from the passed in custom
+// URL string. If the custom URL string is the string "null", nil will be returned. If no custom
+// URL is passed and there is no configured EventDetailURL template, nil will be returned.
+// The following "format strings" will be replaced in the URL, if they are present:
+//
+//   %rule_version%    - The version of the rule that was violated.
+//   %rule_name%       - The name of the rule that was violated.
+//   %file_identifier% - The SHA-256 of the binary being executed.
+//   %accessed_path%   - The path accessed by the binary.
+//   %username%        - The executing user's name.
+//   %machine_id%      - The configured machine ID for this host.
+//   %hostname%        - The machine's FQDN.
+//   %uuid%            - The machine's UUID.
+//   %serial%          - The machine's serial number.
+//
++ (NSURL *)eventDetailURLForFileAccessEvent:(SNTFileAccessEvent *)event customURL:(NSString *)url {
+  if (!url.length || [url isEqualToString:@"null"]) {
+    return nil;
+  }
+
+  SNTConfigurator *config = [SNTConfigurator configurator];
+
+  // Clang format goes wild here. If you use the container literal syntax `@{}` with a block value
+  // type, it seems to break the clang format on/off functionality and breaks formatting for the
+  // remainder of the file.
+  // Using `dictionaryWithObjectsAndKeys` and disabling clang format as a workaround.
+  // clang-format off
+  NSDictionary<NSString *, NSString * (^)()> *kvReplacements =
+    [NSDictionary dictionaryWithObjectsAndKeys:
+      ^{ return event.ruleVersion; },            @"%rule_version%",
+      ^{ return event.ruleName; },               @"%rule_name%",
+      ^{ return event.fileSHA256; },             @"%file_identifier%",
+      ^{ return event.accessedPath; },           @"%accessed_path%",
+      ^{ return event.executingUser; },          @"%username%",
+      ^{ return config.machineID; },             @"%machine_id%",
+      ^{ return [SNTSystemInfo longHostname]; }, @"%hostname%",
+      ^{ return [SNTSystemInfo hardwareUUID]; }, @"%uuid%",
+      ^{ return [SNTSystemInfo serialNumber]; }, @"%serial%",
+      nil];
+  // clang-format on
+
+  NSString *formatStr = [SNTBlockMessage replaceFormatString:url withDict:kvReplacements];
+
+  NSURL *u = [NSURL URLWithString:formatStr];
+  if (!u) {
+    LOGW(@"Unable to generate event detail URL for string '%@'", formatStr);
+  }
+
+  return u;
 }
 
 @end

Source/common/SNTBlockMessageTest.m

@@ -0,0 +1,95 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <OCMock/OCMock.h>
+#import <XCTest/XCTest.h>
+
+#import "Source/common/SNTBlockMessage.h"
+#import "Source/common/SNTConfigurator.h"
+#include "Source/common/SNTFileAccessEvent.h"
+#include "Source/common/SNTStoredEvent.h"
+#import "Source/common/SNTSystemInfo.h"
+
+@interface SNTBlockMessageTest : XCTestCase
+@property id mockConfigurator;
+@property id mockSystemInfo;
+@end
+
+@implementation SNTBlockMessageTest
+
+- (void)setUp {
+  self.mockConfigurator = OCMClassMock([SNTConfigurator class]);
+  OCMStub([self.mockConfigurator configurator]).andReturn(self.mockConfigurator);
+  OCMStub([self.mockConfigurator machineID]).andReturn(@"my_mid");
+
+  self.mockSystemInfo = OCMClassMock([SNTSystemInfo class]);
+  OCMStub([self.mockSystemInfo longHostname]).andReturn(@"my_hn");
+  OCMStub([self.mockSystemInfo hardwareUUID]).andReturn(@"my_u");
+  OCMStub([self.mockSystemInfo serialNumber]).andReturn(@"my_s");
+}
+
+- (void)testEventDetailURLForEvent {
+  SNTStoredEvent *se = [[SNTStoredEvent alloc] init];
+
+  se.fileSHA256 = @"my_fi";
+  se.executingUser = @"my_un";
+
+  NSString *url = @"http://"
+                  @"localhost?fs=%file_sha%&fi=%file_identifier%&bfi=%bundle_or_file_identifier%&"
+                  @"un=%username%&mid=%machine_id%&hn=%hostname%&u=%uuid%&s=%serial%";
+  NSString *wantUrl =
+    @"http://"
+    @"localhost?fs=my_fi&fi=my_fi&bfi=my_fi&bfi=my_fi&un=my_un&mid=my_mid&hn=my_hn&u=my_u&s=my_s";
+
+  NSURL *gotUrl = [SNTBlockMessage eventDetailURLForEvent:se customURL:url];
+
+  // Set fileBundleHash and test again for newly expected values
+  se.fileBundleHash = @"my_fbh";
+
+  wantUrl = @"http://"
+            @"localhost?fs=my_fbh&fi=my_fi&bfi=my_fbh&un=my_un&mid=my_mid&hn=my_hn&u=my_u&s=my_s";
+
+  gotUrl = [SNTBlockMessage eventDetailURLForEvent:se customURL:url];
+
+  XCTAssertEqualObjects(gotUrl.absoluteString, wantUrl);
+
+  XCTAssertNil([SNTBlockMessage eventDetailURLForEvent:se customURL:nil]);
+  XCTAssertNil([SNTBlockMessage eventDetailURLForEvent:se customURL:@"null"]);
+}
+
+- (void)testEventDetailURLForFileAccessEvent {
+  SNTFileAccessEvent *fae = [[SNTFileAccessEvent alloc] init];
+
+  fae.ruleVersion = @"my_rv";
+  fae.ruleName = @"my_rn";
+  fae.fileSHA256 = @"my_fi";
+  fae.accessedPath = @"my_ap";
+  fae.executingUser = @"my_un";
+
+  NSString *url = @"http://"
+                  @"localhost?rv=%rule_version%&rn=%rule_name%&fi=%file_identifier%&ap=%accessed_"
+                  @"path%&un=%username%&mid=%machine_id%&hn=%hostname%&u=%uuid%&s=%serial%";
+  NSString *wantUrl =
+    @"http://"
+    @"localhost?rv=my_rv&rn=my_rn&fi=my_fi&ap=my_ap&un=my_un&mid=my_mid&hn=my_hn&u=my_u&s=my_s";
+
+  NSURL *gotUrl = [SNTBlockMessage eventDetailURLForFileAccessEvent:fae customURL:url];
+
+  XCTAssertEqualObjects(gotUrl.absoluteString, wantUrl);
+
+  XCTAssertNil([SNTBlockMessage eventDetailURLForFileAccessEvent:fae customURL:nil]);
+  XCTAssertNil([SNTBlockMessage eventDetailURLForFileAccessEvent:fae customURL:@"null"]);
+}
+
+@end

Source/common/SNTCachedDecision.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -12,10 +12,11 @@
 ///    See the License for the specific language governing permissions and
 ///    limitations under the License.
 
+#import <EndpointSecurity/EndpointSecurity.h>
 #import <Foundation/Foundation.h>
 
 #import "Source/common/SNTCommonEnums.h"
-#import "Source/common/SNTCommon.h"
+#import "Source/common/SantaVnode.h"
 
 @class MOLCertificate;
 
@@ -24,8 +25,11 @@
 ///
 @interface SNTCachedDecision : NSObject
 
-@property santa_vnode_id_t vnodeId;
+- (instancetype)initWithEndpointSecurityFile:(const es_file_t *)esFile;
+
+@property SantaVnode vnodeId;
 @property SNTEventState decision;
+@property SNTClientMode decisionClientMode;
 @property NSString *decisionExtra;
 @property NSString *sha256;
 
@@ -33,10 +37,12 @@
 @property NSString *certCommonName;
 @property NSArray<MOLCertificate *> *certChain;
 @property NSString *teamID;
+@property NSString *signingID;
 
 @property NSString *quarantineURL;
 
 @property NSString *customMsg;
+@property NSString *customURL;
 @property BOOL silentBlock;
 
 @end

Source/common/SNTCachedDecision.mm

@@ -1,4 +1,5 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -15,4 +16,13 @@
 #import "Source/common/SNTCachedDecision.h"
 
 @implementation SNTCachedDecision
+
+- (instancetype)initWithEndpointSecurityFile:(const es_file_t *)esFile {
+  self = [super init];
+  if (self) {
+    _vnodeId = SantaVnode::VnodeForFile(esFile);
+  }
+  return self;
+}
+
 @end

Source/common/SNTCachedDecisionTest.mm

@@ -0,0 +1,36 @@
+/// Copyright 2022 Google Inc. All rights reserved.
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///    http://www.apache.org/licenses/LICENSE-2.0
+///
+///    Unless required by applicable law or agreed to in writing, software
+///    distributed under the License is distributed on an "AS IS" BASIS,
+///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+///    See the License for the specific language governing permissions and
+///    limitations under the License.
+
+#import <XCTest/XCTest.h>
+
+#import "Source/common/SNTCachedDecision.h"
+#include "Source/common/TestUtils.h"
+
+@interface SNTCachedDecisionTest : XCTestCase
+@end
+
+@implementation SNTCachedDecisionTest
+
+- (void)testSNTCachedDecisionInit {
+  // Ensure the vnodeId field is properly set from the es_file_t
+  struct stat sb = MakeStat();
+  es_file_t file = MakeESFile("foo", sb);
+
+  SNTCachedDecision *cd = [[SNTCachedDecision alloc] initWithEndpointSecurityFile:&file];
+
+  XCTAssertEqual(sb.st_ino, cd.vnodeId.fileid);
+  XCTAssertEqual(sb.st_dev, cd.vnodeId.fsid);
+}
+
+@end

Source/common/SNTCommon.h

@@ -1,102 +0,0 @@
-/// Copyright 2015 Google Inc. All rights reserved.
-///
-/// Licensed under the Apache License, Version 2.0 (the "License");
-/// you may not use this file except in compliance with the License.
-/// You may obtain a copy of the License at
-///
-///    http://www.apache.org/licenses/LICENSE-2.0
-///
-///    Unless required by applicable law or agreed to in writing, software
-///    distributed under the License is distributed on an "AS IS" BASIS,
-///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-///    See the License for the specific language governing permissions and
-///    limitations under the License.
-
-///
-/// Common defines between daemon <-> client
-///
-
-#ifndef SANTA__COMMON__COMMON_H
-#define SANTA__COMMON__COMMON_H
-
-#include <stdint.h>
-#include <sys/param.h>
-
-// Branch prediction
-#define likely(x) __builtin_expect(!!(x), 1)
-#define unlikely(x) __builtin_expect(!!(x), 0)
-
-typedef enum {
-  ACTION_UNSET = 0,
-
-  // REQUESTS
-  ACTION_REQUEST_SHUTDOWN = 10,
-  ACTION_REQUEST_BINARY = 11,
-
-  // RESPONSES
-  ACTION_RESPOND_ALLOW = 20,
-  ACTION_RESPOND_DENY = 21,
-  ACTION_RESPOND_TOOLONG = 22,
-  ACTION_RESPOND_ACK = 23,
-  ACTION_RESPOND_ALLOW_COMPILER = 24,
-  // The following response is stored only in the kernel decision cache.
-  // It is removed by SNTCompilerController
-  ACTION_RESPOND_ALLOW_PENDING_TRANSITIVE = 25,
-
-  // NOTIFY
-  ACTION_NOTIFY_EXEC = 30,
-  ACTION_NOTIFY_WRITE = 31,
-  ACTION_NOTIFY_RENAME = 32,
-  ACTION_NOTIFY_LINK = 33,
-  ACTION_NOTIFY_EXCHANGE = 34,
-  ACTION_NOTIFY_DELETE = 35,
-  ACTION_NOTIFY_WHITELIST = 36,
-  ACTION_NOTIFY_FORK = 37,
-  ACTION_NOTIFY_EXIT = 38,
-
-  // ERROR
-  ACTION_ERROR = 99,
-} santa_action_t;
-
-#define RESPONSE_VALID(x)                                   \
-  (x == ACTION_RESPOND_ALLOW || x == ACTION_RESPOND_DENY || \
-   x == ACTION_RESPOND_ALLOW_COMPILER ||                    \
-   x == ACTION_RESPOND_ALLOW_PENDING_TRANSITIVE)
-
-// Struct to manage vnode IDs
-typedef struct santa_vnode_id_t {
-  uint64_t fsid;
-  uint64_t fileid;
-
-#ifdef __cplusplus
-  bool operator==(const santa_vnode_id_t &rhs) const {
-    return fsid == rhs.fsid && fileid == rhs.fileid;
-  }
-#endif
-} santa_vnode_id_t;
-
-typedef struct {
-  santa_action_t action;
-  santa_vnode_id_t vnode_id;
-  uid_t uid;
-  gid_t gid;
-  pid_t pid;
-  int pidversion;
-  pid_t ppid;
-  char path[MAXPATHLEN];
-  char newpath[MAXPATHLEN];
-  char ttypath[MAXPATHLEN];
-  // For file events, this is the process name.
-  // For exec requests, this is the parent process name.
-  // While process names can technically be 4*MAXPATHLEN, that never
-  // actually happens, so only take MAXPATHLEN and throw away any excess.
-  char pname[MAXPATHLEN];
-
-  // This points to a copy of the original ES message.
-  void *es_message;
-
-  // This points to an NSArray of the process arguments.
-  void *args_array;
-} santa_message_t;
-
-#endif  // SANTA__COMMON__COMMON_H

Source/common/SNTCommonEnums.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -19,12 +19,37 @@
 ///  The integer values are also stored in the database and so shouldn't be changed.
 ///
 
-typedef NS_ENUM(NSInteger, SNTRuleType) {
-  SNTRuleTypeUnknown,
+typedef NS_ENUM(NSInteger, SNTAction) {
+  SNTActionUnset,
 
-  SNTRuleTypeBinary = 1,
-  SNTRuleTypeCertificate = 2,
-  SNTRuleTypeTeamID = 3,
+  // REQUESTS
+  // If an operation is awaiting a cache decision from a similar operation
+  // currently being processed, it will poll about every 5 ms for an answer.
+  SNTActionRequestBinary,
+
+  // RESPONSES
+  SNTActionRespondAllow,
+  SNTActionRespondDeny,
+  SNTActionRespondAllowCompiler,
+};
+
+#define RESPONSE_VALID(x) \
+  (x == SNTActionRespondAllow || x == SNTActionRespondDeny || x == SNTActionRespondAllowCompiler)
+
+// Supported Rule Types
+//
+// Note: These enum values should be in order of decreasing precedence as
+// evaluated by Santa. When adding new enum values, leave some space so that
+// additional rules can be added without violating this. The ordering isn't
+// strictly necessary but improves readability and may preemptively prevent
+// issues should SQLite behavior change.
+typedef NS_ENUM(NSInteger, SNTRuleType) {
+  SNTRuleTypeUnknown = 0,
+
+  SNTRuleTypeBinary = 1000,
+  SNTRuleTypeSigningID = 2000,
+  SNTRuleTypeCertificate = 3000,
+  SNTRuleTypeTeamID = 4000,
 };
 
 typedef NS_ENUM(NSInteger, SNTRuleState) {
@@ -46,31 +71,34 @@ typedef NS_ENUM(NSInteger, SNTClientMode) {
   SNTClientModeLockdown = 2,
 };
 
-typedef NS_ENUM(NSInteger, SNTEventState) {
+typedef NS_ENUM(uint64_t, SNTEventState) {
   // Bits 0-15 bits store non-decision types
   SNTEventStateUnknown = 0,
   SNTEventStateBundleBinary = 1,
 
-  // Bits 16-23 store deny decision types
-  SNTEventStateBlockUnknown = 1 << 16,
-  SNTEventStateBlockBinary = 1 << 17,
-  SNTEventStateBlockCertificate = 1 << 18,
-  SNTEventStateBlockScope = 1 << 19,
-  SNTEventStateBlockTeamID = 1 << 20,
+  // Bits 16-39 store deny decision types
+  SNTEventStateBlockUnknown = 1ULL << 16,
+  SNTEventStateBlockBinary = 1ULL << 17,
+  SNTEventStateBlockCertificate = 1ULL << 18,
+  SNTEventStateBlockScope = 1ULL << 19,
+  SNTEventStateBlockTeamID = 1ULL << 20,
+  SNTEventStateBlockLongPath = 1ULL << 21,
+  SNTEventStateBlockSigningID = 1ULL << 22,
 
-  // Bits 24-31 store allow decision types
-  SNTEventStateAllowUnknown = 1 << 24,
-  SNTEventStateAllowBinary = 1 << 25,
-  SNTEventStateAllowCertificate = 1 << 26,
-  SNTEventStateAllowScope = 1 << 27,
-  SNTEventStateAllowCompiler = 1 << 28,
-  SNTEventStateAllowTransitive = 1 << 29,
-  SNTEventStateAllowPendingTransitive = 1 << 30,
-  SNTEventStateAllowTeamID = 1 << 31,
+  // Bits 40-63 store allow decision types
+  SNTEventStateAllowUnknown = 1ULL << 40,
+  SNTEventStateAllowBinary = 1ULL << 41,
+  SNTEventStateAllowCertificate = 1ULL << 42,
+  SNTEventStateAllowScope = 1ULL << 43,
+  SNTEventStateAllowCompiler = 1ULL << 44,
+  SNTEventStateAllowTransitive = 1ULL << 45,
+  SNTEventStateAllowPendingTransitive = 1ULL << 46,
+  SNTEventStateAllowTeamID = 1ULL << 47,
+  SNTEventStateAllowSigningID = 1ULL << 48,
 
   // Block and Allow masks
-  SNTEventStateBlock = 0xFF << 16,
-  SNTEventStateAllow = 0xFF << 24
+  SNTEventStateBlock = 0xFFFFFFULL << 16,
+  SNTEventStateAllow = 0xFFFFFFULL << 40,
 };
 
 typedef NS_ENUM(NSInteger, SNTRuleTableError) {
@@ -93,6 +121,7 @@ typedef NS_ENUM(NSInteger, SNTEventLogType) {
   SNTEventLogTypeSyslog,
   SNTEventLogTypeFilelog,
   SNTEventLogTypeProtobuf,
+  SNTEventLogTypeJSON,
   SNTEventLogTypeNull,
 };
 
@@ -111,14 +140,44 @@ typedef NS_ENUM(NSInteger, SNTSyncStatusType) {
   SNTSyncStatusTypeUnknown,
 };
 
+typedef NS_ENUM(NSInteger, SNTSyncContentEncoding) {
+  SNTSyncContentEncodingNone,
+  SNTSyncContentEncodingDeflate,
+  SNTSyncContentEncodingGzip,
+};
+
 typedef NS_ENUM(NSInteger, SNTMetricFormatType) {
   SNTMetricFormatTypeUnknown,
   SNTMetricFormatTypeRawJSON,
   SNTMetricFormatTypeMonarchJSON,
 };
 
+typedef NS_ENUM(NSInteger, SNTOverrideFileAccessAction) {
+  SNTOverrideFileAccessActionNone,
+  SNTOverrideFileAccessActionAuditOnly,
+  SNTOverrideFileAccessActionDiable,
+};
+
+typedef NS_ENUM(NSInteger, SNTDeviceManagerStartupPreferences) {
+  SNTDeviceManagerStartupPreferencesNone,
+  SNTDeviceManagerStartupPreferencesUnmount,
+  SNTDeviceManagerStartupPreferencesForceUnmount,
+  SNTDeviceManagerStartupPreferencesRemount,
+  SNTDeviceManagerStartupPreferencesForceRemount,
+};
+
+#ifdef __cplusplus
+enum class FileAccessPolicyDecision {
+  kNoPolicy,
+  kDenied,
+  kDeniedInvalidSignature,
+  kAllowed,
+  kAllowedReadAccess,
+  kAllowedAuditOnly,
+};
+#endif
+
 static const char *kSantaDPath =
   "/Applications/Santa.app/Contents/Library/SystemExtensions/"
   "com.google.santa.daemon.systemextension/Contents/MacOS/com.google.santa.daemon";
-static const char *kSantaCtlPath = "/Applications/Santa.app/Contents/MacOS/santactl";
 static const char *kSantaAppPath = "/Applications/Santa.app";

Source/common/SNTConfigurator.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -65,7 +65,8 @@
 ///      <key>rule_type</key>
 ///      <string>BINARY</string>  (one of BINARY, CERTIFICATE or TEAMID)
 ///      <key>policy</key>
-///      <string>BLOCKLIST</string>  (one of ALLOWLIST, ALLOWLIST_COMPILER, BLOCKLIST, SILENT_BLOCKLIST)
+///      <string>BLOCKLIST</string>  (one of ALLOWLIST, ALLOWLIST_COMPILER, BLOCKLIST,
+///                                   SILENT_BLOCKLIST)
 ///    </dict>
 ///  </array>
 ///
@@ -182,10 +183,10 @@
 ///    SNTEventLogTypeSyslog "syslog": Sent to ASL or ULS (if built with the 10.12 SDK or later).
 ///    SNTEventLogTypeFilelog "file": Sent to a file on disk. Use eventLogPath to specify a path.
 ///    SNTEventLogTypeNull "null": Logs nothing
-///    SNTEventLogTypeProtobuf "protobuf": (BETA) Sent to a file on disk, using maildir format. Use
-///      mailDirectory to specify a path. Use mailDirectoryFileSizeThresholdKB,
-///      mailDirectorySizeThresholdMB and mailDirectoryEventMaxFlushTimeSec to configure
-///      additional maildir format settings.
+///    SNTEventLogTypeProtobuf "protobuf": (BETA) Sent to a file on disk, using a maildir-like
+///      format. Use spoolDirectory to specify a path. Use spoolDirectoryFileSizeThresholdKB,
+///      spoolDirectorySizeThresholdMB and spoolDirectoryEventMaxFlushTimeSec to configure
+///      additional settings.
 ///    Defaults to SNTEventLogTypeFilelog.
 ///    For mobileconfigs use EventLogType as the key and syslog or filelog strings as the value.
 ///
@@ -193,6 +194,13 @@
 ///
 @property(readonly, nonatomic) SNTEventLogType eventLogType;
 
+///
+/// Returns the raw value of the EventLogType configuration key instead of being
+/// converted to the SNTEventLogType enum. If the key is not set, the default log
+/// type is returned.
+///
+@property(readonly, nonatomic) NSString *eventLogTypeRaw;
+
 ///
 ///  If eventLogType is set to Filelog, eventLogPath will provide the path to save logs.
 ///  Defaults to /var/db/santa/santa.log.
@@ -202,40 +210,77 @@
 @property(readonly, nonatomic) NSString *eventLogPath;
 
 ///
-///  If eventLogType is set to protobuf, mailDirectory will provide the base path used for
-///  saving logs using the maildir format.
-///  Defaults to /var/db/santa/mail.
+///  If eventLogType is set to protobuf, spoolDirectory will provide the base path used for
+///  saving logs using a maildir-like format.
+///  Defaults to /var/db/santa/spool.
 ///
 ///  @note: This property is KVO compliant, but should only be read once at santad startup.
 ///
-@property(readonly, nonatomic) NSString *mailDirectory;
+@property(readonly, nonatomic) NSString *spoolDirectory;
 
 ///
-///  If eventLogType is set to protobuf, mailDirectoryFileSizeThresholdKB sets the per-file size
-///  limit for files saved in the mailDirectory.
+///  If eventLogType is set to protobuf, spoolDirectoryFileSizeThresholdKB sets the per-file size
+///  limit for files saved in the spoolDirectory.
+///  Defaults to 250.
+///
+///  @note: This property is KVO compliant, but should only be read once at santad startup.
+///
+@property(readonly, nonatomic) NSUInteger spoolDirectoryFileSizeThresholdKB;
+
+///
+///  If eventLogType is set to protobuf, spoolDirectorySizeThresholdMB sets the total size
+///  limit for all files saved in the spoolDirectory.
 ///  Defaults to 100.
 ///
 ///  @note: This property is KVO compliant, but should only be read once at santad startup.
 ///
-@property(readonly, nonatomic) NSUInteger mailDirectoryFileSizeThresholdKB;
+@property(readonly, nonatomic) NSUInteger spoolDirectorySizeThresholdMB;
 
 ///
-///  If eventLogType is set to protobuf, mailDirectorySizeThresholdMB sets the total size
-///  limit for all files saved in the mailDirectory.
-///  Defaults to 500.
-///
-///  @note: This property is KVO compliant, but should only be read once at santad startup.
-///
-@property(readonly, nonatomic) NSUInteger mailDirectorySizeThresholdMB;
-
-///
-///  If eventLogType is set to protobuf, mailDirectoryEventMaxFlushTimeSec sets the maximum amount
+///  If eventLogType is set to protobuf, spoolDirectoryEventMaxFlushTimeSec sets the maximum amount
 ///  of time an event will be stored in memory before being written to disk.
-///  Defaults to 5.0.
+///  Defaults to 15.0.
 ///
 ///  @note: This property is KVO compliant, but should only be read once at santad startup.
 ///
-@property(readonly, nonatomic) float mailDirectoryEventMaxFlushTimeSec;
+@property(readonly, nonatomic) float spoolDirectoryEventMaxFlushTimeSec;
+
+///
+///  If set, contains the filesystem access policy configuration.
+///
+///  @note: The property fileAccessPolicyPlist will be ignored if
+///         fileAccessPolicy is set.
+///  @note: This property is KVO compliant.
+///
+@property(readonly, nonatomic) NSDictionary *fileAccessPolicy;
+
+///
+///  If set, contains the path to the filesystem access policy config plist.
+///
+///  @note: This property will be ignored if fileAccessPolicy is set.
+///  @note: This property is KVO compliant.
+///
+@property(readonly, nonatomic) NSString *fileAccessPolicyPlist;
+
+///
+///  This is the message shown to the user when access to a file is blocked
+///  by a binary due to some rule in the current File Access policy if that rule
+///  doesn't provide a custom message. If this is not configured, a reasonable
+///  default is provided.
+///
+///  @note: This property is KVO compliant.
+///
+@property(readonly, nonatomic) NSString *fileAccessBlockMessage;
+
+///
+///  If fileAccessPolicyPlist is set, fileAccessPolicyUpdateIntervalSec
+///  sets the number of seconds between times that the configuration file is
+///  re-read and policies reconstructed.
+///  Defaults to 600 seconds (10 minutes)
+///
+///  @note: This property is KVO compliant, but should only be read once at santad startup.
+///
+@property(readonly, nonatomic) uint32_t fileAccessPolicyUpdateIntervalSec;
 
 ///
 /// Enabling this appends the Santa machine ID to the end of each log line. If nothing
@@ -244,15 +289,6 @@
 ///
 @property(readonly, nonatomic) BOOL enableMachineIDDecoration;
 
-///
-///  Use an internal cache for decisions instead of relying on the caching
-///  mechanism built-in to the EndpointSecurity framework. This may increase
-///  performance, particularly when Santa is run alongside other system
-///  extensions.
-///  Has no effect if the system extension is not being used. Defaults to NO.
-///
-@property(readonly, nonatomic) BOOL enableSysxCache;
-
 #pragma mark - GUI Settings
 
 ///
@@ -265,6 +301,14 @@
 ///
 @property(readonly, nonatomic) BOOL enableSilentMode;
 
+///
+///  When silent TTY mode is enabled, Santa will not emit TTY notifications for
+///  blocked processes.
+///
+///  Defaults to NO.
+///
+@property(readonly, nonatomic) BOOL enableSilentTTYMode;
+
 ///
 /// The text to display when opening Santa.app.
 /// If unset, the default text will be displayed.
@@ -356,6 +400,27 @@
 ///
 @property(readonly, nonatomic) NSDictionary *syncProxyConfig;
 
+///
+///  Extra headers to include in all requests made during syncing.
+///  Keys and values must all be strings, any other type will be silently ignored.
+///  Some headers cannot be set through this key, including:
+///
+///    * Content-Encoding
+///    * Content-Length
+///    * Content-Type
+///    * Connection
+///    * Host
+///    * Proxy-Authenticate
+///    * Proxy-Authorization
+///    * WWW-Authenticate
+///
+///  The header "Authorization" is also documented by Apple to be one that will
+///  be ignored but this is not really the case, at least at present. If you
+///  are able to use a different header for this that would be safest but if not
+///  using Authorization /should/ be fine.
+///
+@property(readonly, nonatomic) NSDictionary *syncExtraHeaders;
+
 ///
 ///  The machine owner.
 ///
@@ -376,6 +441,8 @@
 ///
 @property(nonatomic) BOOL syncCleanRequired;
 
+#pragma mark - USB Settings
+
 ///
 /// USB Mount Blocking. Defaults to false.
 ///
@@ -388,10 +455,37 @@
 @property(nonatomic) NSArray<NSString *> *remountUSBMode;
 
 ///
-/// When `blockUSBMount` is set, this is the message shown to the user when a device is blocked
-/// If this message is not configured, a reasonable default is provided.
+/// If set, defines the action that should be taken on existing USB mounts when
+/// Santa starts up.
 ///
-@property(readonly, nonatomic) NSString *usbBlockMessage;
+/// Supported values are:
+///   * "Unmount": Unmount mass storage devices
+///   * "ForceUnmount": Force unmount mass storage devices
+///
+///
+/// Note: Existing mounts with mount flags that are a superset of RemountUSBMode
+/// are unaffected and left mounted.
+///
+@property(readonly, nonatomic) SNTDeviceManagerStartupPreferences onStartUSBOptions;
+
+///
+/// If set, will override the action taken when a file access rule violation
+/// occurs. This setting will apply across all rules in the file access policy.
+///
+/// Possible values are
+///   * "AuditOnly": When a rule is violated, it will be logged, but the access
+///     will not be blocked
+///   * "Disable": No access will be logged or blocked.
+///
+/// If not set, no override will take place and the file acces spolicy will
+/// apply as configured.
+///
+@property(readonly, nonatomic) SNTOverrideFileAccessAction overrideFileAccessAction;
+
+///
+///  Set the action that will override file access policy config action
+///
+- (void)setSyncServerOverrideFileAccessAction:(NSString *)action;
 
 ///
 ///  If set, this over-rides the default machine ID used for syncing.
@@ -492,6 +586,12 @@
 ///
 @property(readonly, nonatomic) BOOL enableBackwardsCompatibleContentEncoding;
 
+///
+/// If set, "santactl sync" will use the supplied "Content-Encoding", possible
+/// settings include "gzip", "deflate", "none". If empty defaults to "deflate".
+///
+@property(readonly, nonatomic) SNTSyncContentEncoding syncClientContentEncoding;
+
 ///
 ///  Contains the FCM project name.
 ///

Source/common/SNTConfigurator.m

@@ -1,4 +1,4 @@
-/// Copyright 2021 Google Inc. All rights reserved.
+/// Copyright 2014-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@
 
 /// Holds the last processed hash of the static rules list.
 @property(atomic) NSDictionary *cachedStaticRules;
+
 @end
 
 @implementation SNTConfigurator
@@ -44,6 +45,10 @@
 /// The hard-coded path to the sync state file.
 NSString *const kSyncStateFilePath = @"/var/db/santa/sync-state.plist";
 
+#ifdef DEBUG
+NSString *const kConfigOverrideFilePath = @"/var/db/santa/config-overrides.plist";
+#endif
+
 /// The domain used by mobileconfig.
 static NSString *const kMobileConfigDomain = @"com.google.santa";
 
@@ -51,6 +56,7 @@ static NSString *const kMobileConfigDomain = @"com.google.santa";
 static NSString *const kStaticRules = @"StaticRules";
 static NSString *const kSyncBaseURLKey = @"SyncBaseURL";
 static NSString *const kSyncProxyConfigKey = @"SyncProxyConfiguration";
+static NSString *const kSyncExtraHeadersKey = @"SyncExtraHeaders";
 static NSString *const kSyncEnableCleanSyncEventUpload = @"SyncEnableCleanSyncEventUpload";
 static NSString *const kClientAuthCertificateFileKey = @"ClientAuthCertificateFile";
 static NSString *const kClientAuthCertificatePasswordKey = @"ClientAuthCertificatePassword";
@@ -67,6 +73,7 @@ static NSString *const kMachineIDPlistFileKey = @"MachineIDPlist";
 static NSString *const kMachineIDPlistKeyKey = @"MachineIDKey";
 
 static NSString *const kEnableSilentModeKey = @"EnableSilentMode";
+static NSString *const kEnableSilentTTYModeKey = @"EnableSilentTTYMode";
 static NSString *const kAboutTextKey = @"AboutText";
 static NSString *const kMoreInfoURLKey = @"MoreInfoURL";
 static NSString *const kEventDetailURLKey = @"EventDetailURL";
@@ -87,21 +94,23 @@ static NSString *const kFileChangesPrefixFiltersKey = @"FileChangesPrefixFilters
 
 static NSString *const kEventLogType = @"EventLogType";
 static NSString *const kEventLogPath = @"EventLogPath";
-static NSString *const kMailDirectory = @"MailDirectory";
-static NSString *const kMailDirectoryFileSizeThresholdKB = @"MailDirectoryFileSizeThresholdKB";
-static NSString *const kMailDirectorySizeThresholdMB = @"MailDirectorySizeThresholdMB";
-static NSString *const kMailDirectoryEventMaxFlushTimeSec = @"MailDirectoryEventMaxFlushTimeSec";
+static NSString *const kSpoolDirectory = @"SpoolDirectory";
+static NSString *const kSpoolDirectoryFileSizeThresholdKB = @"SpoolDirectoryFileSizeThresholdKB";
+static NSString *const kSpoolDirectorySizeThresholdMB = @"SpoolDirectorySizeThresholdMB";
+static NSString *const kSpoolDirectoryEventMaxFlushTimeSec = @"SpoolDirectoryEventMaxFlushTimeSec";
+
+static NSString *const kFileAccessPolicy = @"FileAccessPolicy";
+static NSString *const kFileAccessPolicyPlist = @"FileAccessPolicyPlist";
+static NSString *const kFileAccessBlockMessage = @"FileAccessBlockMessage";
+static NSString *const kFileAccessPolicyUpdateIntervalSec = @"FileAccessPolicyUpdateIntervalSec";
 
 static NSString *const kEnableMachineIDDecoration = @"EnableMachineIDDecoration";
 
-static NSString *const kEnableSysxCache = @"EnableSysxCache";
-
 static NSString *const kEnableForkAndExitLogging = @"EnableForkAndExitLogging";
 static NSString *const kIgnoreOtherEndpointSecurityClients = @"IgnoreOtherEndpointSecurityClients";
 static NSString *const kEnableDebugLogging = @"EnableDebugLogging";
 
-static NSString *const kEnableBackwardsCompatibleContentEncoding =
-  @"EnableBackwardsCompatibleContentEncoding";
+static NSString *const kClientContentEncoding = @"SyncClientContentEncoding";
 
 static NSString *const kFCMProject = @"FCMProject";
 static NSString *const kFCMEntity = @"FCMEntity";
@@ -112,6 +121,7 @@ static NSString *const kClientModeKey = @"ClientMode";
 static NSString *const kFailClosedKey = @"FailClosed";
 static NSString *const kBlockUSBMountKey = @"BlockUSBMount";
 static NSString *const kRemountUSBModeKey = @"RemountUSBMode";
+static NSString *const kOnStartUSBOptions = @"OnStartUSBOptions";
 static NSString *const kEnableTransitiveRulesKey = @"EnableTransitiveRules";
 static NSString *const kEnableTransitiveRulesKeyDeprecated = @"EnableTransitiveWhitelisting";
 static NSString *const kAllowedPathRegexKey = @"AllowedPathRegex";
@@ -120,8 +130,8 @@ static NSString *const kBlockedPathRegexKey = @"BlockedPathRegex";
 static NSString *const kBlockedPathRegexKeyDeprecated = @"BlacklistRegex";
 static NSString *const kEnableAllEventUploadKey = @"EnableAllEventUpload";
 static NSString *const kDisableUnknownEventUploadKey = @"DisableUnknownEventUpload";
+static NSString *const kOverrideFileAccessActionKey = @"OverrideFileAccessAction";
 
-// TODO(markowsky): move these to sync server only.
 static NSString *const kMetricFormat = @"MetricFormat";
 static NSString *const kMetricURL = @"MetricURL";
 static NSString *const kMetricExportInterval = @"MetricExportInterval";
@@ -157,6 +167,7 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       kRuleSyncLastSuccess : date,
       kSyncCleanRequired : number,
       kEnableAllEventUploadKey : number,
+      kOverrideFileAccessActionKey : string,
     };
     _forcedConfigKeyTypes = @{
       kClientModeKey : number,
@@ -171,9 +182,11 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       kBlockedPathRegexKeyDeprecated : re,
       kBlockUSBMountKey : number,
       kRemountUSBModeKey : array,
+      kOnStartUSBOptions : string,
       kEnablePageZeroProtectionKey : number,
       kEnableBadSignatureProtectionKey : number,
-      kEnableSilentModeKey : string,
+      kEnableSilentModeKey : number,
+      kEnableSilentTTYModeKey : number,
       kAboutTextKey : string,
       kMoreInfoURLKey : string,
       kEventDetailURLKey : string,
@@ -186,11 +199,14 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       kModeNotificationLockdown : string,
       kStaticRules : array,
       kSyncBaseURLKey : string,
+      kSyncEnableCleanSyncEventUpload : number,
       kSyncProxyConfigKey : dictionary,
+      kSyncExtraHeadersKey : dictionary,
       kClientAuthCertificateFileKey : string,
       kClientAuthCertificatePasswordKey : string,
       kClientAuthCertificateCNKey : string,
       kClientAuthCertificateIssuerKey : string,
+      kClientContentEncoding : string,
       kServerAuthRootsDataKey : data,
       kServerAuthRootsFileKey : string,
       kMachineOwnerKey : string,
@@ -201,16 +217,18 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       kMachineIDPlistKeyKey : string,
       kEventLogType : string,
       kEventLogPath : string,
-      kMailDirectory : string,
-      kMailDirectoryFileSizeThresholdKB : number,
-      kMailDirectorySizeThresholdMB : number,
-      kMailDirectoryEventMaxFlushTimeSec : number,
+      kSpoolDirectory : string,
+      kSpoolDirectoryFileSizeThresholdKB : number,
+      kSpoolDirectorySizeThresholdMB : number,
+      kSpoolDirectoryEventMaxFlushTimeSec : number,
+      kFileAccessPolicy : dictionary,
+      kFileAccessPolicyPlist : string,
+      kFileAccessBlockMessage : string,
+      kFileAccessPolicyUpdateIntervalSec : number,
       kEnableMachineIDDecoration : number,
-      kEnableSysxCache : number,
       kEnableForkAndExitLogging : number,
       kIgnoreOtherEndpointSecurityClients : number,
       kEnableDebugLogging : number,
-      kEnableBackwardsCompatibleContentEncoding : number,
       kFCMProject : string,
       kFCMEntity : string,
       kFCMAPIKey : string,
@@ -221,6 +239,7 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       kMetricExtraLabels : dictionary,
       kEnableAllEventUploadKey : number,
       kDisableUnknownEventUploadKey : number,
+      kOverrideFileAccessActionKey : string,
     };
     _defaults = [NSUserDefaults standardUserDefaults];
     [_defaults addSuiteNamed:@"com.google.santa"];
@@ -235,7 +254,10 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
 
 #pragma mark Singleton retriever
 
-+ (instancetype)configurator {
+// The returned value is marked unsafe_unretained to avoid unnecessary retain/release handling.
+// The object returned is guaranteed to exist for the lifetime of the process so there's no need
+// to do this handling.
++ (__unsafe_unretained instancetype)configurator {
   static SNTConfigurator *sharedConfigurator;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
@@ -301,6 +323,14 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return [self configStateSet];
 }
 
++ (NSSet *)keyPathsForValuesAffectingSyncExtraHeaders {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingEnableCleanSyncEventUpload {
+  return [self configStateSet];
+}
+
 + (NSSet *)keyPathsForValuesAffectingEnablePageZeroProtection {
   return [self configStateSet];
 }
@@ -393,19 +423,35 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return [self configStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingMailDirectory {
++ (NSSet *)keyPathsForValuesAffectingSpoolDirectory {
   return [self configStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingMailDirectoryFileSizeThresholdKB {
++ (NSSet *)keyPathsForValuesAffectingSpoolDirectoryFileSizeThresholdKB {
   return [self configStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingMailDirectorySizeThresholdMB {
++ (NSSet *)keyPathsForValuesAffectingSpoolDirectorySizeThresholdMB {
   return [self configStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingMailDirectoryEventMaxFlushTimeSec {
++ (NSSet *)keyPathsForValuesAffectingSpoolDirectoryEventMaxFlushTimeSec {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingFileAccessPolicy {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingFileAccessPolicyPlist {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingFileAccessBlockMessage {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingFileAccessPolicyUpdateIntervalSec {
   return [self configStateSet];
 }
 
@@ -425,10 +471,6 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return [self syncAndConfigStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingEnableSysxCache {
-  return [self configStateSet];
-}
-
 + (NSSet *)keyPathsForValuesAffectingEnableForkAndExitLogging {
   return [self configStateSet];
 }
@@ -441,10 +483,6 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return [self configStateSet];
 }
 
-+ (NSSet *)keyPathsForValuesAffectingEnableBackwardsCompatibleContentEncoding {
-  return [self configStateSet];
-}
-
 + (NSSet *)keyPathsForValuesAffectingFcmProject {
   return [self configStateSet];
 }
@@ -474,14 +512,18 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
 }
 
 + (NSSet *)keyPathsForValuesAffectingRemountUSBMode {
-  return [self configStateSet];
-}
-
-+ (NSSet *)keyPathsForValuesAffectingRemountUSBBlockMessage {
   return [self syncAndConfigStateSet];
 }
 
++ (NSSet *)keyPathsForValuesAffectingRemountUSBBlockMessage {
+  return [self configStateSet];
+}
+
 + (NSSet *)keyPathsForValuesAffectingUsbBlockMessage {
+  return [self configStateSet];
+}
+
++ (NSSet *)keyPathsForValuesAffectingOverrideFileAccessActionKey {
   return [self syncAndConfigStateSet];
 }
 
@@ -583,7 +625,10 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
 }
 
 - (NSArray<NSString *> *)remountUSBMode {
-  NSArray<NSString *> *args = self.configState[kRemountUSBModeKey];
+  NSArray<NSString *> *args = self.syncState[kRemountUSBModeKey];
+  if (!args) {
+    args = (NSArray<NSString *> *)self.configState[kRemountUSBModeKey];
+  }
   for (id arg in args) {
     if (![arg isKindOfClass:[NSString class]]) {
       return nil;
@@ -592,6 +637,22 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return args;
 }
 
+- (SNTDeviceManagerStartupPreferences)onStartUSBOptions {
+  NSString *action = [self.configState[kOnStartUSBOptions] lowercaseString];
+
+  if ([action isEqualToString:@"unmount"]) {
+    return SNTDeviceManagerStartupPreferencesUnmount;
+  } else if ([action isEqualToString:@"forceunmount"]) {
+    return SNTDeviceManagerStartupPreferencesForceUnmount;
+  } else if ([action isEqualToString:@"remount"]) {
+    return SNTDeviceManagerStartupPreferencesRemount;
+  } else if ([action isEqualToString:@"forceremount"]) {
+    return SNTDeviceManagerStartupPreferencesForceRemount;
+  } else {
+    return SNTDeviceManagerStartupPreferencesNone;
+  }
+}
+
 - (NSDictionary<NSString *, SNTRule *> *)staticRules {
   return self.cachedStaticRules;
 }
@@ -607,6 +668,10 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return self.configState[kSyncProxyConfigKey];
 }
 
+- (NSDictionary *)syncExtraHeaders {
+  return self.configState[kSyncExtraHeadersKey];
+}
+
 - (BOOL)enablePageZeroProtection {
   NSNumber *number = self.configState[kEnablePageZeroProtectionKey];
   return number ? [number boolValue] : YES;
@@ -622,6 +687,11 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return number ? [number boolValue] : NO;
 }
 
+- (BOOL)enableSilentTTYMode {
+  NSNumber *number = self.configState[kEnableSilentTTYModeKey];
+  return number ? [number boolValue] : NO;
+}
+
 - (NSString *)aboutText {
   return self.configState[kAboutTextKey];
 }
@@ -685,6 +755,20 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return self.configState[kClientAuthCertificateIssuerKey];
 }
 
+- (SNTSyncContentEncoding)syncClientContentEncoding {
+  NSString *contentEncoding = [self.configState[kClientContentEncoding] lowercaseString];
+  if ([contentEncoding isEqualToString:@"deflate"]) {
+    return SNTSyncContentEncodingDeflate;
+  } else if ([contentEncoding isEqualToString:@"gzip"]) {
+    return SNTSyncContentEncodingGzip;
+  } else if ([contentEncoding isEqualToString:@"none"]) {
+    return SNTSyncContentEncodingNone;
+  } else {
+    // Ensure we have the same default zlib behavior Santa's always had otherwise.
+    return SNTSyncContentEncodingDeflate;
+  }
+}
+
 - (NSData *)syncServerAuthRootsData {
   return self.configState[kServerAuthRootsDataKey];
 }
@@ -755,6 +839,8 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
     return SNTEventLogTypeSyslog;
   } else if ([logType isEqualToString:@"null"]) {
     return SNTEventLogTypeNull;
+  } else if ([logType isEqualToString:@"json"]) {
+    return SNTEventLogTypeJSON;
   } else if ([logType isEqualToString:@"file"]) {
     return SNTEventLogTypeFilelog;
   } else {
@@ -762,30 +848,57 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   }
 }
 
+- (NSString *)eventLogTypeRaw {
+  return self.configState[kEventLogType] ?: @"file";
+}
+
 - (NSString *)eventLogPath {
   return self.configState[kEventLogPath] ?: @"/var/db/santa/santa.log";
 }
 
-- (NSString *)mailDirectory {
-  return self.configState[kMailDirectory] ?: @"/var/db/santa/mail";
+- (NSString *)spoolDirectory {
+  return self.configState[kSpoolDirectory] ?: @"/var/db/santa/spool";
 }
 
-- (NSUInteger)mailDirectoryFileSizeThresholdKB {
-  return self.configState[kMailDirectoryFileSizeThresholdKB]
-           ? [self.configState[kMailDirectoryFileSizeThresholdKB] unsignedIntegerValue]
+- (NSUInteger)spoolDirectoryFileSizeThresholdKB {
+  return self.configState[kSpoolDirectoryFileSizeThresholdKB]
+           ? [self.configState[kSpoolDirectoryFileSizeThresholdKB] unsignedIntegerValue]
+           : 250;
+}
+
+- (NSUInteger)spoolDirectorySizeThresholdMB {
+  return self.configState[kSpoolDirectorySizeThresholdMB]
+           ? [self.configState[kSpoolDirectorySizeThresholdMB] unsignedIntegerValue]
            : 100;
 }
 
-- (NSUInteger)mailDirectorySizeThresholdMB {
-  return self.configState[kMailDirectorySizeThresholdMB]
-           ? [self.configState[kMailDirectorySizeThresholdMB] unsignedIntegerValue]
-           : 500;
+- (float)spoolDirectoryEventMaxFlushTimeSec {
+  return self.configState[kSpoolDirectoryEventMaxFlushTimeSec]
+           ? [self.configState[kSpoolDirectoryEventMaxFlushTimeSec] floatValue]
+           : 15.0;
 }
 
-- (float)mailDirMaxFlushTime {
-  return self.configState[kMailDirectoryEventMaxFlushTimeSec]
-           ? [self.configState[kMailDirectoryEventMaxFlushTimeSec] floatValue]
-           : 5.0;
+- (NSDictionary *)fileAccessPolicy {
+  return self.configState[kFileAccessPolicy];
+}
+
+- (NSString *)fileAccessPolicyPlist {
+  // This property is ignored when kFileAccessPolicy is set
+  if (self.configState[kFileAccessPolicy]) {
+    return nil;
+  } else {
+    return self.configState[kFileAccessPolicyPlist];
+  }
+}
+
+- (NSString *)fileAccessBlockMessage {
+  return self.configState[kFileAccessBlockMessage];
+}
+
+- (uint32_t)fileAccessPolicyUpdateIntervalSec {
+  return self.configState[kFileAccessPolicyUpdateIntervalSec]
+           ? [self.configState[kFileAccessPolicyUpdateIntervalSec] unsignedIntValue]
+           : 60 * 10;
 }
 
 - (BOOL)enableMachineIDDecoration {
@@ -793,11 +906,6 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return number ? [number boolValue] : NO;
 }
 
-- (BOOL)enableSysxCache {
-  NSNumber *number = self.configState[kEnableSysxCache];
-  return number ? [number boolValue] : YES;
-}
-
 - (BOOL)enableCleanSyncEventUpload {
   NSNumber *number = self.configState[kSyncEnableCleanSyncEventUpload];
   return number ? [number boolValue] : NO;
@@ -840,11 +948,6 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   return [number boolValue] || self.debugFlag;
 }
 
-- (BOOL)enableBackwardsCompatibleContentEncoding {
-  NSNumber *number = self.configState[kEnableBackwardsCompatibleContentEncoding];
-  return number ? [number boolValue] : NO;
-}
-
 - (NSString *)fcmProject {
   return self.configState[kFCMProject];
 }
@@ -866,8 +969,37 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
 }
 
 - (BOOL)blockUSBMount {
-  NSNumber *number = self.configState[kBlockUSBMountKey];
-  return number ? [number boolValue] : NO;
+  NSNumber *n = self.syncState[kBlockUSBMountKey];
+  if (n) return [n boolValue];
+
+  return [self.configState[kBlockUSBMountKey] boolValue];
+}
+
+- (void)setSyncServerOverrideFileAccessAction:(NSString *)action {
+  NSString *a = [action lowercaseString];
+  if ([a isEqualToString:@"auditonly"] || [a isEqualToString:@"disable"] ||
+      [a isEqualToString:@"none"] || [a isEqualToString:@""]) {
+    [self updateSyncStateForKey:kOverrideFileAccessActionKey value:action];
+  }
+}
+
+- (SNTOverrideFileAccessAction)overrideFileAccessAction {
+  NSString *action = [self.syncState[kOverrideFileAccessActionKey] lowercaseString];
+
+  if (!action) {
+    action = [self.configState[kOverrideFileAccessActionKey] lowercaseString];
+    if (!action) {
+      return SNTOverrideFileAccessActionNone;
+    }
+  }
+
+  if ([action isEqualToString:@"auditonly"]) {
+    return SNTOverrideFileAccessActionAuditOnly;
+  } else if ([action isEqualToString:@"disable"]) {
+    return SNTOverrideFileAccessActionDiable;
+  } else {
+    return SNTOverrideFileAccessActionNone;
+  }
 }
 
 ///
@@ -998,6 +1130,22 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
       forcedConfig[key] = [self expressionForPattern:pattern];
     }
   }
+#ifdef DEBUG
+  NSDictionary *overrides = [NSDictionary dictionaryWithContentsOfFile:kConfigOverrideFilePath];
+  for (NSString *key in overrides) {
+    id obj = overrides[key];
+    if (![obj isKindOfClass:self.forcedConfigKeyTypes[key]] ||
+        ([self.forcedConfigKeyTypes[key] isKindOfClass:[NSRegularExpression class]] &&
+         ![obj isKindOfClass:[NSString class]])) {
+      continue;
+    }
+    forcedConfig[key] = obj;
+    if (self.forcedConfigKeyTypes[key] == [NSRegularExpression class]) {
+      NSString *pattern = [obj isKindOfClass:[NSString class]] ? obj : nil;
+      forcedConfig[key] = [self expressionForPattern:pattern];
+    }
+  }
+#endif
   return forcedConfig;
 }
 
@@ -1014,12 +1162,50 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
                                            selector:@selector(defaultsChanged:)
                                                name:NSUserDefaultsDidChangeNotification
                                              object:nil];
+#ifdef DEBUG
+  dispatch_async(dispatch_get_global_queue(QOS_CLASS_UTILITY, 0), ^{
+    [self watchOverridesFile];
+  });
+#endif
 }
 
+#ifdef DEBUG
+- (void)watchOverridesFile {
+  while (![[NSFileManager defaultManager] fileExistsAtPath:kConfigOverrideFilePath]) {
+    [NSThread sleepForTimeInterval:0.2];
+  }
+  [self defaultsChanged:nil];
+
+  int descriptor = open([kConfigOverrideFilePath fileSystemRepresentation], O_EVTONLY);
+  if (descriptor < 0) {
+    return;
+  }
+
+  dispatch_source_t source =
+    dispatch_source_create(DISPATCH_SOURCE_TYPE_VNODE, descriptor,
+                           DISPATCH_VNODE_WRITE | DISPATCH_VNODE_RENAME | DISPATCH_VNODE_DELETE,
+                           dispatch_get_global_queue(QOS_CLASS_UTILITY, 0));
+  dispatch_source_set_event_handler(source, ^{
+    dispatch_async(dispatch_get_main_queue(), ^{
+      [self defaultsChanged:nil];
+    });
+    unsigned long events = dispatch_source_get_data(source);
+    if ((events & DISPATCH_VNODE_DELETE) || (events & DISPATCH_VNODE_RENAME)) {
+      dispatch_source_cancel(source);
+    }
+  });
+  dispatch_source_set_cancel_handler(source, ^{
+    close(descriptor);
+    [self watchOverridesFile];
+  });
+  dispatch_resume(source);
+}
+#endif
+
 - (void)defaultsChanged:(void *)v {
   SEL handleChange = @selector(handleChange);
   [NSObject cancelPreviousPerformRequestsWithTarget:self selector:handleChange object:nil];
-  [self performSelector:handleChange withObject:nil afterDelay:5.0f];
+  [self performSelector:handleChange withObject:nil afterDelay:1.0f];
 }
 
 ///
@@ -1042,6 +1228,7 @@ static NSString *const kSyncCleanRequired = @"SyncCleanRequired";
   for (id rule in staticRules) {
     if (![rule isKindOfClass:[NSDictionary class]]) return;
     SNTRule *r = [[SNTRule alloc] initWithDictionary:rule];
+    if (!r) continue;
     rules[r.identifier] = r;
   }
   self.cachedStaticRules = [rules copy];

Source/common/SNTFileAccessEvent.h

@@ -0,0 +1,99 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+#import <MOLCertificate/MOLCertificate.h>
+
+///
+///  Represents an event stored in the database.
+///
+@interface SNTFileAccessEvent : NSObject <NSSecureCoding>
+
+///
+/// The watched path that was accessed
+///
+@property NSString *accessedPath;
+
+///
+/// The rule version and name that were violated
+///
+@property NSString *ruleVersion;
+@property NSString *ruleName;
+
+///
+/// The SHA256 of the process that accessed the path
+///
+@property NSString *fileSHA256;
+
+///
+/// The path of the process that accessed the watched path
+///
+@property NSString *filePath;
+
+///
+/// If the process is part of a bundle, the name of the application
+///
+@property NSString *application;
+
+///
+/// If the executed file was signed, this is the Team ID if present in the signature information.
+///
+@property NSString *teamID;
+
+///
+/// If the executed file was signed, this is the Signing ID if present in the signature information.
+///
+@property NSString *signingID;
+
+///
+///  The user who executed the binary.
+///
+@property NSString *executingUser;
+
+///
+///  The process ID of the binary being executed.
+///
+@property NSNumber *pid;
+
+///
+///  The parent process ID of the binary being executed.
+///
+@property NSNumber *ppid;
+
+///
+///  The name of the parent process.
+///
+@property NSString *parentName;
+
+///
+/// If the executed file was signed, this is an NSArray of MOLCertificate's
+/// representing the signing chain.
+///
+@property NSArray<MOLCertificate *> *signingChain;
+
+///
+/// A string representing the publisher based on the signingChain
+///
+@property(readonly) NSString *publisherInfo;
+
+///
+/// Return an array of the underlying SecCertificateRef's of the signingChain
+///
+/// WARNING: If the refs need to be used for a long time be careful to properly
+/// CFRetain/CFRelease the returned items.
+///
+@property(readonly) NSArray *signingChainCertRefs;
+
+@end

Source/common/SNTFileAccessEvent.m

@@ -0,0 +1,97 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import "Source/common/SNTFileAccessEvent.h"
+
+#import "Source/common/CertificateHelpers.h"
+
+@implementation SNTFileAccessEvent
+
+#define ENCODE(o)                               \
+  do {                                          \
+    if (self.o) {                               \
+      [coder encodeObject:self.o forKey:@(#o)]; \
+    }                                           \
+  } while (0)
+
+#define DECODE(o, c)                                             \
+  do {                                                           \
+    _##o = [decoder decodeObjectOfClass:[c class] forKey:@(#o)]; \
+  } while (0)
+
+#define DECODEARRAY(o, c)                                                                        \
+  do {                                                                                           \
+    _##o = [decoder decodeObjectOfClasses:[NSSet setWithObjects:[NSArray class], [c class], nil] \
+                                   forKey:@(#o)];                                                \
+  } while (0)
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+  }
+  return self;
+}
+
++ (BOOL)supportsSecureCoding {
+  return YES;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+  ENCODE(accessedPath);
+  ENCODE(ruleVersion);
+  ENCODE(ruleName);
+  ENCODE(fileSHA256);
+  ENCODE(filePath);
+  ENCODE(application);
+  ENCODE(teamID);
+  ENCODE(teamID);
+  ENCODE(pid);
+  ENCODE(ppid);
+  ENCODE(parentName);
+  ENCODE(signingChain);
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+  self = [super init];
+  if (self) {
+    DECODE(accessedPath, NSString);
+    DECODE(ruleVersion, NSString);
+    DECODE(ruleName, NSString);
+    DECODE(fileSHA256, NSString);
+    DECODE(filePath, NSString);
+    DECODE(application, NSString);
+    DECODE(teamID, NSString);
+    DECODE(teamID, NSString);
+    DECODE(pid, NSNumber);
+    DECODE(ppid, NSNumber);
+    DECODE(parentName, NSString);
+    DECODEARRAY(signingChain, MOLCertificate);
+  }
+  return self;
+}
+
+- (NSString *)description {
+  return [NSString
+    stringWithFormat:@"SNTFileAccessEvent: Accessed: %@, By: %@", self.accessedPath, self.filePath];
+}
+
+- (NSString *)publisherInfo {
+  return Publisher(self.signingChain, self.teamID);
+}
+
+- (NSArray *)signingChainCertRefs {
+  return CertificateChain(self.signingChain);
+}
+
+@end

Source/common/SNTFileInfo.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -12,6 +12,7 @@
 ///    See the License for the specific language governing permissions and
 ///    limitations under the License.
 
+#import <EndpointSecurity/EndpointSecurity.h>
 #import <Foundation/Foundation.h>
 
 @class MOLCodesignChecker;
@@ -32,6 +33,14 @@
 ///
 - (instancetype)initWithPath:(NSString *)path error:(NSError **)error;
 
+///
+///  Convenience initializer.
+///
+///  @param esFile Pointer to an es_file_t provided by the EndpointSecurity framework.
+///      Assumes that the path is a resolved path.
+///
+- (instancetype)initWithEndpointSecurityFile:(const es_file_t *)esFile error:(NSError **)error;
+
 ///
 ///  Convenience initializer.
 ///

Source/common/SNTFileInfo.m

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -25,6 +25,8 @@
 #include <sys/stat.h>
 #include <sys/xattr.h>
 
+#import "Source/common/SNTLogging.h"
+
 // Simple class to hold the data of a mach_header and the offset within the file
 // in which that header was found.
 @interface MachHeaderWithOffset : NSObject
@@ -48,6 +50,7 @@
 @property NSFileHandle *fileHandle;
 @property NSUInteger fileSize;
 @property NSString *fileOwnerHomeDir;
+@property NSString *sha256Storage;
 
 // Cached properties
 @property NSBundle *bundleRef;
@@ -63,6 +66,26 @@
 extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
 
 - (instancetype)initWithResolvedPath:(NSString *)path error:(NSError **)error {
+  struct stat fileStat;
+  if (path.length) {
+    lstat(path.UTF8String, &fileStat);
+  }
+  return [self initWithResolvedPath:path stat:&fileStat error:error];
+}
+
+- (instancetype)initWithEndpointSecurityFile:(const es_file_t *)esFile error:(NSError **)error {
+  return [self initWithResolvedPath:@(esFile->path.data) stat:&esFile->stat error:error];
+}
+
+- (instancetype)initWithResolvedPath:(NSString *)path
+                                stat:(const struct stat *)fileStat
+                               error:(NSError **)error {
+  if (!fileStat) {
+    // This is a programming error. Bail.
+    LOGE(@"NULL stat buffer unsupported");
+    exit(EXIT_FAILURE);
+  }
+
   self = [super init];
   if (self) {
     _path = path;
@@ -76,9 +99,7 @@ extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
       return nil;
     }
 
-    struct stat fileStat;
-    lstat(_path.UTF8String, &fileStat);
-    if (!((S_IFMT & fileStat.st_mode) == S_IFREG)) {
+    if (!((S_IFMT & fileStat->st_mode) == S_IFREG)) {
       if (error) {
         NSString *errStr = [NSString stringWithFormat:@"Non regular file: %s", strerror(errno)];
         *error = [NSError errorWithDomain:@"com.google.santa.fileinfo"
@@ -88,12 +109,12 @@ extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
       return nil;
     }
 
-    _fileSize = fileStat.st_size;
+    _fileSize = fileStat->st_size;
 
     if (_fileSize == 0) return nil;
 
-    if (fileStat.st_uid != 0) {
-      struct passwd *pwd = getpwuid(fileStat.st_uid);
+    if (fileStat->st_uid != 0) {
+      struct passwd *pwd = getpwuid(fileStat->st_uid);
       if (pwd) {
         _fileOwnerHomeDir = @(pwd->pw_dir);
       }
@@ -214,9 +235,13 @@ extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
 }
 
 - (NSString *)SHA256 {
-  NSString *sha256;
-  [self hashSHA1:NULL SHA256:&sha256];
-  return sha256;
+  // Memoize the value
+  if (!self.sha256Storage) {
+    NSString *sha256;
+    [self hashSHA1:NULL SHA256:&sha256];
+    self.sha256Storage = sha256;
+  }
+  return self.sha256Storage;
 }
 
 #pragma mark File Type Info
@@ -547,6 +572,10 @@ extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
     NSData *cmdData = [self safeSubdataWithRange:NSMakeRange(offset, sz_segment)];
     if (!cmdData) return nil;
 
+    if (((struct load_command *)[cmdData bytes])->cmdsize < sizeof(struct load_command)) {
+      return nil;
+    }
+
     if (is64) {
       struct segment_command_64 *lc = (struct segment_command_64 *)[cmdData bytes];
       if (lc->cmd == LC_SEGMENT_64 && memcmp(lc->segname, "__TEXT", 6) == 0) {
@@ -617,7 +646,10 @@ extern NSString *const NSURLQuarantinePropertiesKey WEAK_IMPORT_ATTRIBUTE;
 ///
 - (NSData *)safeSubdataWithRange:(NSRange)range {
   @try {
-    if ((range.location + range.length) > self.fileSize) return nil;
+    NSUInteger size;
+    if (__builtin_add_overflow(range.location, range.length, &size) || size > self.fileSize) {
+      return nil;
+    }
     [self.fileHandle seekToFileOffset:range.location];
     NSData *d = [self.fileHandle readDataOfLength:range.length];
     if (d.length != range.length) return nil;

Source/common/SNTFileInfoTest.m

@@ -34,7 +34,12 @@
 - (void)testPathStandardizing {
   SNTFileInfo *sut = [[SNTFileInfo alloc] initWithPath:@"/Applications/Safari.app"];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.path, @"/Applications/Safari.app/Contents/MacOS/Safari");
+  if (@available(macOS 13.0, *)) {
+    XCTAssertEqualObjects(sut.path, @"/System/Volumes/Preboot/Cryptexes/App/System/Applications/"
+                                    @"Safari.app/Contents/MacOS/Safari");
+  } else {
+    XCTAssertEqualObjects(sut.path, @"/Applications/Safari.app/Contents/MacOS/Safari");
+  }
 
   sut = [[SNTFileInfo alloc] initWithPath:@"../../../../../../../../../../../../../../../bin/ls"];
   XCTAssertEqualObjects(sut.path, @"/bin/ls");
@@ -90,6 +95,11 @@
 }
 
 - (void)testKext {
+  // Skip this test on macOS 13 as KEXTs have moved into the kernelcache.
+  if (@available(macOS 13.0, *)) {
+    return;
+  }
+
   SNTFileInfo *sut = [[SNTFileInfo alloc]
     initWithPath:@"/System/Library/Extensions/AppleAPIC.kext/Contents/MacOS/AppleAPIC"];
 

Source/common/SNTKVOManager.h

@@ -0,0 +1,34 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+// The callback type when KVO notifications are received for observed key paths.
+// The first parameter is the previous value, the second paramter is the new value.
+typedef void (^KVOCallback)(id oldValue, id newValue);
+
+@interface SNTKVOManager : NSObject
+
+// Add an observer for the selector on the given object. When a KVO notification
+// is received, the callback is called. If the notification contains objects that
+// are not of the expectedType, nil is passed as the argument to the callback.
+// The observer is removed when the returned instance is deallocated.
+- (instancetype)initWithObject:(id)object
+                      selector:(SEL)selector
+                          type:(Class)expectedType
+                      callback:(KVOCallback)callback;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end

Source/common/SNTKVOManager.mm

@@ -0,0 +1,72 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import "Source/common/SNTKVOManager.h"
+
+#import "Source/common/SNTLogging.h"
+
+@interface SNTKVOManager ()
+@property KVOCallback callback;
+@property Class expectedType;
+@property NSString *keyPath;
+@property id object;
+@end
+
+@implementation SNTKVOManager
+
+- (instancetype)initWithObject:(id)object
+                      selector:(SEL)selector
+                          type:(Class)expectedType
+                      callback:(KVOCallback)callback {
+  self = [super self];
+  if (self) {
+    NSString *selectorName = NSStringFromSelector(selector);
+    if (![object respondsToSelector:selector]) {
+      LOGE(@"Attempt to add observer for an unknown selector (%@) for object (%@)", selectorName,
+           [object class]);
+      return nil;
+    }
+
+    _object = object;
+    _keyPath = selectorName;
+    _expectedType = expectedType;
+    _callback = callback;
+
+    [object addObserver:self
+             forKeyPath:selectorName
+                options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld)
+                context:NULL];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [self.object removeObserver:self forKeyPath:self.keyPath context:NULL];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary<NSString *, id> *)change
+                       context:(void *)context {
+  id oldValue = [change[NSKeyValueChangeOldKey] isKindOfClass:self.expectedType]
+                  ? change[NSKeyValueChangeOldKey]
+                  : nil;
+  id newValue = [change[NSKeyValueChangeNewKey] isKindOfClass:self.expectedType]
+                  ? change[NSKeyValueChangeNewKey]
+                  : nil;
+
+  self.callback(oldValue, newValue);
+}
+
+@end

Source/common/SNTKVOManagerTest.mm

@@ -0,0 +1,129 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <XCTest/XCTest.h>
+
+#import "Source/common/SNTKVOManager.h"
+
+@interface Foo : NSObject
+@property NSNumber *propNumber;
+@property NSArray *propArray;
+@property id propId;
+@end
+
+@implementation Foo
+@end
+
+@interface SNTKVOManagerTest : XCTestCase
+@end
+
+@implementation SNTKVOManagerTest
+
+- (void)testInvalidSelector {
+  Foo *foo = [[Foo alloc] init];
+
+  SNTKVOManager *kvo = [[SNTKVOManager alloc] initWithObject:foo
+                                                    selector:NSSelectorFromString(@"doesNotExist")
+                                                        type:[NSNumber class]
+                                                    callback:^(id, id){
+                                                    }];
+
+  XCTAssertNil(kvo);
+}
+
+- (void)testNormalOperation {
+  Foo *foo = [[Foo alloc] init];
+  dispatch_semaphore_t sema = dispatch_semaphore_create(0);
+
+  int origVal = 123;
+  int update1 = 456;
+  int update2 = 789;
+
+  foo.propNumber = @(origVal);
+
+  // Store the values from the callback to test against expected values
+  __block int oldVal;
+  __block int newVal;
+
+  SNTKVOManager *kvo =
+    [[SNTKVOManager alloc] initWithObject:foo
+                                 selector:@selector(propNumber)
+                                     type:[NSNumber class]
+                                 callback:^(NSNumber *oldValue, NSNumber *newValue) {
+                                   oldVal = [oldValue intValue];
+                                   newVal = [newValue intValue];
+                                   dispatch_semaphore_signal(sema);
+                                 }];
+  XCTAssertNotNil(kvo);
+
+  // Ensure an update to the observed property triggers the callback
+  foo.propNumber = @(update1);
+
+  XCTAssertEqual(0,
+                 dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC)),
+                 "Failed waiting for first observable update");
+  XCTAssertEqual(oldVal, origVal);
+  XCTAssertEqual(newVal, update1);
+
+  // One more time why not
+  foo.propNumber = @(update2);
+
+  XCTAssertEqual(0,
+                 dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC)),
+                 "Failed waiting for second observable update");
+  XCTAssertEqual(oldVal, update1);
+  XCTAssertEqual(newVal, update2);
+}
+
+- (void)testUnexpectedTypes {
+  Foo *foo = [[Foo alloc] init];
+  dispatch_semaphore_t sema = dispatch_semaphore_create(0);
+
+  NSString *origVal = @"any_val";
+  NSString *update = @"new_val";
+  foo.propId = origVal;
+
+  __block id oldVal;
+  __block id newVal;
+
+  SNTKVOManager *kvo = [[SNTKVOManager alloc] initWithObject:foo
+                                                    selector:@selector(propId)
+                                                        type:[NSString class]
+                                                    callback:^(id oldValue, id newValue) {
+                                                      oldVal = oldValue;
+                                                      newVal = newValue;
+                                                      dispatch_semaphore_signal(sema);
+                                                    }];
+  XCTAssertNotNil(kvo);
+
+  // Update to an unexpected type (here, NSNumber instead of NSString)
+  foo.propId = @(123);
+
+  XCTAssertEqual(0,
+                 dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC)),
+                 "Failed waiting for first observable update");
+  XCTAssertEqualObjects(oldVal, origVal);
+  XCTAssertNil(newVal);
+
+  // Update again with an expected type, ensure oldVal is now nil
+  foo.propId = update;
+
+  XCTAssertEqual(0,
+                 dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC)),
+                 "Failed waiting for first observable update");
+  XCTAssertNil(oldVal);
+  XCTAssertEqualObjects(newVal, update);
+}
+
+@end

Source/common/SNTMetricSet.m

@@ -280,15 +280,12 @@ NSString *SNTMetricMakeStringFromMetricType(SNTMetricType metricType) {
   if (_fieldNames.count == 0) {
     metricDict[@"fields"][@""] = @[ [self encodeMetricValueForFieldValues:@[]] ];
   } else {
-    for (NSString *fieldName in _fieldNames) {
-      NSMutableArray *fieldVals = [[NSMutableArray alloc] init];
+    NSMutableArray *fieldVals = [[NSMutableArray alloc] init];
 
-      for (NSArray<NSString *> *fieldValues in _metricsForFieldValues) {
-        [fieldVals addObject:[self encodeMetricValueForFieldValues:fieldValues]];
-      }
-
-      metricDict[@"fields"][fieldName] = fieldVals;
+    for (NSArray<NSString *> *fieldValues in _metricsForFieldValues) {
+      [fieldVals addObject:[self encodeMetricValueForFieldValues:fieldValues]];
     }
+    metricDict[@"fields"][[_fieldNames componentsJoinedByString:@","]] = fieldVals;
   }
   return metricDict;
 }

Source/common/SNTMetricSetTest.m

@@ -672,4 +672,35 @@
                           output);
   }
 }
+
+- (void)testEnsureMetricsWithMultipleFieldNamesSerializeOnce {
+  SNTMetricSet *metricSet = [[SNTMetricSet alloc] initWithHostname:@"testHost"
+                                                          username:@"testUser"];
+
+  SNTMetricCounter *c =
+    [metricSet counterWithName:@"/santa/events"
+                    fieldNames:@[ @"client", @"event_type" ]
+                      helpText:@"Count of events on the host for a given ES client"];
+  [c incrementBy:1 forFieldValues:@[ @"device_manager", @"auth_mount" ]];
+
+  NSDictionary *expected = @{
+    @"/santa/events" : @{
+      @"description" : @"Count of events on the host for a given ES client",
+      @"type" : [NSNumber numberWithInt:(int)SNTMetricTypeCounter],
+      @"fields" : @{
+        @"client,event_type" : @[
+          @{
+            @"value" : @"device_manager,auth_mount",
+            @"created" : [NSDate date],
+            @"last_updated" : [NSDate date],
+            @"data" : [NSNumber numberWithInt:1],
+          },
+        ],
+      },
+    },
+  };
+
+  NSDictionary *got = [metricSet export][@"metrics"];
+  XCTAssertEqualObjects(expected, got, @"metrics do not match expected");
+}
 @end

Source/common/SNTPrefixTree.cc

@@ -1,227 +0,0 @@
-/// Copyright 2018 Google Inc. All rights reserved.
-///
-/// Licensed under the Apache License, Version 2.0 (the "License");
-/// you may not use this file except in compliance with the License.
-/// You may obtain a copy of the License at
-///
-///    http://www.apache.org/licenses/LICENSE-2.0
-///
-///    Unless required by applicable law or agreed to in writing, software
-///    distributed under the License is distributed on an "AS IS" BASIS,
-///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-///    See the License for the specific language governing permissions and
-///    limitations under the License.
-
-#include "Source/common/SNTPrefixTree.h"
-
-#include <string.h>
-
-#include <mutex>
-
-#define LOGD(format, ...)  // NOP
-#define LOGE(format, ...)  // NOP
-
-#define lck_rw_lock_shared(l) pthread_rwlock_rdlock(&l)
-#define lck_rw_unlock_shared(l) pthread_rwlock_unlock(&l)
-#define lck_rw_lock_exclusive(l) pthread_rwlock_wrlock(&l)
-#define lck_rw_unlock_exclusive(l) pthread_rwlock_unlock(&l)
-
-#define lck_rw_lock_shared_to_exclusive(l) \
-  ({                                       \
-    pthread_rwlock_unlock(&l);             \
-    false;                                 \
-  })
-#define lck_rw_lock_exclusive_to_shared(l) \
-  ({                                       \
-    pthread_rwlock_unlock(&l);             \
-    pthread_rwlock_rdlock(&l);             \
-  })
-
-#define lck_mtx_lock(l) l->lock()
-#define lck_mtx_unlock(l) l->unlock()
-
-SNTPrefixTree::SNTPrefixTree(uint32_t max_nodes) {
-  root_ = new SantaPrefixNode();
-  node_count_ = 0;
-  max_nodes_ = max_nodes;
-
-  pthread_rwlock_init(&spt_lock_, nullptr);
-  spt_add_lock_ = new std::mutex;
-}
-
-IOReturn SNTPrefixTree::AddPrefix(const char *prefix, uint64_t *node_count) {
-  // Serialize requests to AddPrefix. Otherwise one AddPrefix thread could
-  // overwrite whole branches of another. HasPrefix is still free to read the
-  // tree, until AddPrefix needs to modify it.
-  lck_mtx_lock(spt_add_lock_);
-
-  // Don't allow an empty prefix.
-  if (prefix[0] == '\0') return kIOReturnBadArgument;
-
-  LOGD("Trying to add prefix: %s", prefix);
-
-  // Enforce max tree depth.
-  size_t len = strnlen(prefix, max_nodes_);
-
-  // Grab a shared lock until a new branch is required.
-  lck_rw_lock_shared(spt_lock_);
-
-  SantaPrefixNode *node = root_;
-  for (size_t i = 0; i < len; ++i) {
-    // If there is a node in the path that is considered a prefix, stop adding.
-    // For our purposes we only care about the shortest path that matches.
-    if (node->isPrefix) break;
-
-    // Only process a byte at a time.
-    uint8_t value = (uint8_t)prefix[i];
-
-    // Create the child if it does not exist.
-    if (!node->children[value]) {
-      // Upgrade the shared lock.
-      // If the upgrade fails, the shared lock is released.
-      if (!lck_rw_lock_shared_to_exclusive(spt_lock_)) {
-        // Grab a new exclusive lock.
-        lck_rw_lock_exclusive(spt_lock_);
-      }
-
-      // Is there enough room for the rest of the prefix?
-      if ((node_count_ + (len - i)) > max_nodes_) {
-        LOGE("Prefix tree is full, can not add: %s", prefix);
-
-        if (node_count) *node_count = node_count_;
-        lck_rw_unlock_exclusive(spt_lock_);
-        lck_mtx_unlock(spt_add_lock_);
-        return kIOReturnNoResources;
-      }
-
-      // Create the rest of the prefix.
-      while (i < len) {
-        value = (uint8_t)prefix[i++];
-
-        SantaPrefixNode *new_node = new SantaPrefixNode();
-        node->children[value] = new_node;
-        ++node_count_;
-
-        node = new_node;
-      }
-
-      // This is the end, mark the node as a prefix.
-      LOGD("Added prefix: %s", prefix);
-
-      node->isPrefix = true;
-
-      // Downgrade the exclusive lock
-      lck_rw_lock_exclusive_to_shared(spt_lock_);
-    } else if (i + 1 == len) {
-      // If the child does exist and it is the end...
-      // Set the new, higher prefix and prune the now dead nodes.
-
-      if (!lck_rw_lock_shared_to_exclusive(spt_lock_)) {
-        lck_rw_lock_exclusive(spt_lock_);
-      }
-
-      PruneNode(node->children[value]);
-
-      SantaPrefixNode *new_node = new SantaPrefixNode();
-      new_node->isPrefix = true;
-
-      node->children[value] = new_node;
-      ++node_count_;
-
-      LOGD("Added prefix: %s", prefix);
-
-      lck_rw_lock_exclusive_to_shared(spt_lock_);
-    }
-
-    // Get ready for the next iteration.
-    node = node->children[value];
-  }
-
-  if (node_count) *node_count = node_count_;
-
-  lck_rw_unlock_shared(spt_lock_);
-  lck_mtx_unlock(spt_add_lock_);
-
-  return kIOReturnSuccess;
-}
-
-bool SNTPrefixTree::HasPrefix(const char *string) {
-  lck_rw_lock_shared(spt_lock_);
-
-  auto found = false;
-
-  SantaPrefixNode *node = root_;
-
-  // A well formed tree will always break this loop. Even if string doesn't
-  // terminate.
-  const char *p = string;
-  while (*p) {
-    // Only process a byte at a time.
-    node = node->children[(uint8_t)*p++];
-
-    // If it doesn't exist in the tree, no match.
-    if (!node) break;
-
-    // If it does exist, is it a prefix?
-    if (node->isPrefix) {
-      found = true;
-      break;
-    }
-  }
-
-  lck_rw_unlock_shared(spt_lock_);
-
-  return found;
-}
-
-void SNTPrefixTree::Reset() {
-  lck_rw_lock_exclusive(spt_lock_);
-
-  PruneNode(root_);
-  root_ = new SantaPrefixNode();
-  node_count_ = 0;
-
-  lck_rw_unlock_exclusive(spt_lock_);
-}
-
-void SNTPrefixTree::PruneNode(SantaPrefixNode *target) {
-  if (!target) return;
-
-  // For deep trees, a recursive approach will generate too many stack frames.
-  // Make a "stack" and walk the tree.
-  auto stack = new SantaPrefixNode *[node_count_ + 1];
-  if (!stack) {
-    LOGE("Unable to prune tree!");
-
-    return;
-  }
-  auto count = 0;
-
-  // Seed the "stack" with a starting node.
-  stack[count++] = target;
-
-  // Start at the target node and walk the tree to find and delete all the
-  // sub-nodes.
-  while (count) {
-    auto node = stack[--count];
-
-    for (int i = 0; i < 256; ++i) {
-      if (!node->children[i]) continue;
-      stack[count++] = node->children[i];
-    }
-
-    delete node;
-    --node_count_;
-  }
-
-  delete[] stack;
-}
-
-SNTPrefixTree::~SNTPrefixTree() {
-  lck_rw_lock_exclusive(spt_lock_);
-  PruneNode(root_);
-  root_ = nullptr;
-  lck_rw_unlock_exclusive(spt_lock_);
-
-  pthread_rwlock_destroy(&spt_lock_);
-}

Source/common/SNTPrefixTree.h

@@ -1,91 +0,0 @@
-/// Copyright 2018 Google Inc. All rights reserved.
-///
-/// Licensed under the Apache License, Version 2.0 (the "License");
-/// you may not use this file except in compliance with the License.
-/// You may obtain a copy of the License at
-///
-///    http://www.apache.org/licenses/LICENSE-2.0
-///
-///    Unless required by applicable law or agreed to in writing, software
-///    distributed under the License is distributed on an "AS IS" BASIS,
-///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-///    See the License for the specific language governing permissions and
-///    limitations under the License.
-
-#ifndef SANTA__SANTA_DRIVER__SANTAPREFIXTREE_H
-#define SANTA__SANTA_DRIVER__SANTAPREFIXTREE_H
-
-#include <IOKit/IOReturn.h>
-#include <sys/param.h>
-
-// Support for unit testing.
-#include <pthread.h>
-#include <stdint.h>
-
-#include <mutex>
-
-///
-///  SantaPrefixTree is a simple prefix tree implementation.
-///  Operations are thread safe.
-///
-class SNTPrefixTree {
- public:
-  // Add a prefix to the tree.
-  // Optionally pass node_count to get the number of nodes after the add.
-  IOReturn AddPrefix(const char *, uint64_t *node_count = nullptr);
-
-  // Check if the tree has a prefix for string.
-  bool HasPrefix(const char *string);
-
-  // Reset the tree.
-  void Reset();
-
-  SNTPrefixTree(uint32_t max_nodes = kDefaultMaxNodes);
-  ~SNTPrefixTree();
-
- private:
-  ///
-  ///  SantaPrefixNode is a wrapper class that represents one byte.
-  ///  1 node can represent a whole ASCII character.
-  ///  For example a pointer to the 'A' node will be stored at children[0x41].
-  ///  It takes 1-4 nodes to represent a UTF-8 encoded Unicode character.
-  ///
-  ///  The path for "/🤘" would look like this:
-  ///      children[0x2f] -> children[0xf0] -> children[0x9f] -> children[0xa4]
-  ///      -> children[0x98]
-  ///
-  ///  The path for "/dev" is:
-  ///      children[0x2f] -> children[0x64] -> children[0x65] -> children[0x76]
-  ///
-  ///  Lookups of children are O(1).
-  ///
-  ///  Having the nodes represented by a smaller width, such as a nibble (1/2
-  ///  byte), would drastically decrease the memory footprint but would double
-  ///  required dereferences.
-  ///
-  ///  TODO(bur): Potentially convert this into a full on radix tree.
-  ///
-  class SantaPrefixNode {
-   public:
-    bool isPrefix;
-    SantaPrefixNode *children[256];
-  };
-
-  // PruneNode will remove the passed in node from the tree.
-  // The passed in node and all subnodes will be deleted.
-  // It is the caller's responsibility to reset the pointer to this node (held
-  // by the parent). If the tree is in use grab the exclusive lock.
-  void PruneNode(SantaPrefixNode *);
-
-  SantaPrefixNode *root_;
-
-  // Each node takes up ~2k, assuming MAXPATHLEN is 1024 max out at ~2MB.
-  static const uint32_t kDefaultMaxNodes = MAXPATHLEN;
-  uint32_t max_nodes_;
-  uint32_t node_count_;
-
-  pthread_rwlock_t spt_lock_;
-  std::mutex *spt_add_lock_;
-};
-
-#endif /* SANTA__SANTA_DRIVER__SANTAPREFIXTREE_H */

Source/common/SNTPrefixTreeTest.mm

@@ -1,73 +0,0 @@
-/// Copyright 2018 Google Inc. All rights reserved.
-///
-/// Licensed under the Apache License, Version 2.0 (the "License");
-/// you may not use this file except in compliance with the License.
-/// You may obtain a copy of the License at
-///
-///    http://www.apache.org/licenses/LICENSE-2.0
-///
-///    Unless required by applicable law or agreed to in writing, software
-///    distributed under the License is distributed on an "AS IS" BASIS,
-///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-///    See the License for the specific language governing permissions and
-///    limitations under the License.
-
-#import <XCTest/XCTest.h>
-
-#include "Source/common/SNTPrefixTree.h"
-
-@interface SNTPrefixTreeTest : XCTestCase
-@end
-
-@implementation SNTPrefixTreeTest
-
-- (void)testAddAndHas {
-  auto t = SNTPrefixTree();
-  XCTAssertFalse(t.HasPrefix("/private/var/tmp/file1"));
-  t.AddPrefix("/private/var/tmp/");
-  XCTAssertTrue(t.HasPrefix("/private/var/tmp/file1"));
-}
-
-- (void)testReset {
-  auto t = SNTPrefixTree();
-  t.AddPrefix("/private/var/tmp/");
-  XCTAssertTrue(t.HasPrefix("/private/var/tmp/file1"));
-  t.Reset();
-  XCTAssertFalse(t.HasPrefix("/private/var/tmp/file1"));
-}
-
-- (void)testThreading {
-  uint32_t count = 4096;
-  auto t = new SNTPrefixTree(count * (uint32_t)[NSUUID UUID].UUIDString.length);
-
-  NSMutableArray *UUIDs = [NSMutableArray arrayWithCapacity:count];
-  for (int i = 0; i < count; ++i) {
-    [UUIDs addObject:[NSUUID UUID].UUIDString];
-  }
-
-  __block BOOL stop = NO;
-
-  // Create a bunch of background noise.
-  dispatch_async(dispatch_get_global_queue(0, 0), ^{
-    for (uint64_t i = 0; i < UINT64_MAX; ++i) {
-      dispatch_async(dispatch_get_global_queue(0, 0), ^{
-        t->HasPrefix([UUIDs[i % count] UTF8String]);
-      });
-      if (stop) return;
-    }
-  });
-
-  // Fill up the tree.
-  dispatch_apply(count, dispatch_get_global_queue(0, 0), ^(size_t i) {
-    XCTAssertEqual(t->AddPrefix([UUIDs[i] UTF8String]), kIOReturnSuccess);
-  });
-
-  // Make sure every leaf byte is found.
-  dispatch_apply(count, dispatch_get_global_queue(0, 0), ^(size_t i) {
-    XCTAssertTrue(t->HasPrefix([UUIDs[i] UTF8String]));
-  });
-
-  stop = YES;
-}
-
-@end

Source/common/SNTRule.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -41,6 +41,11 @@
 ///
 @property(copy) NSString *customMsg;
 
+///
+///  A custom URL to take the user to when this binary is blocked from executing.
+///
+@property(copy) NSString *customURL;
+
 ///
 ///  The time when this rule was last retrieved from the rules database, if rule is transitive.
 ///  Stored as number of seconds since 00:00:00 UTC on 1 January 2001.
@@ -51,18 +56,18 @@
 ///  Designated initializer.
 ///
 - (instancetype)initWithIdentifier:(NSString *)identifier
-                         state:(SNTRuleState)state
-                          type:(SNTRuleType)type
-                     customMsg:(NSString *)customMsg
-                     timestamp:(NSUInteger)timestamp;
+                             state:(SNTRuleState)state
+                              type:(SNTRuleType)type
+                         customMsg:(NSString *)customMsg
+                         timestamp:(NSUInteger)timestamp;
 
 ///
 ///  Initialize with a default timestamp: current time if rule state is transitive, 0 otherwise.
 ///
 - (instancetype)initWithIdentifier:(NSString *)identifier
-                         state:(SNTRuleState)state
-                          type:(SNTRuleType)type
-                     customMsg:(NSString *)customMsg;
+                             state:(SNTRuleState)state
+                              type:(SNTRuleType)type
+                         customMsg:(NSString *)customMsg;
 
 ///
 ///  Initialize with a dictionary received from a sync server.
@@ -74,4 +79,9 @@
 ///
 - (void)resetTimestamp;
 
+///
+///  Returns a dictionary representation of the rule.
+///
+- (NSDictionary *)dictionaryRepresentation;
+
 @end

Source/common/SNTRule.m

@@ -13,8 +13,15 @@
 ///    limitations under the License.
 
 #import "Source/common/SNTRule.h"
+
+#include <CommonCrypto/CommonCrypto.h>
+#include <os/base.h>
+
 #import "Source/common/SNTSyncConstants.h"
 
+// https://developer.apple.com/help/account/manage-your-team/locate-your-team-id/
+static const NSUInteger kExpectedTeamIDLength = 10;
+
 @interface SNTRule ()
 @property(readwrite) NSUInteger timestamp;
 @end
@@ -28,6 +35,79 @@
                          timestamp:(NSUInteger)timestamp {
   self = [super init];
   if (self) {
+    if (identifier.length == 0) {
+      return nil;
+    }
+
+    NSCharacterSet *nonHex =
+      [[NSCharacterSet characterSetWithCharactersInString:@"0123456789abcdef"] invertedSet];
+    NSCharacterSet *nonUppercaseAlphaNumeric = [[NSCharacterSet
+      characterSetWithCharactersInString:@"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"] invertedSet];
+
+    switch (type) {
+      case SNTRuleTypeBinary: OS_FALLTHROUGH;
+      case SNTRuleTypeCertificate: {
+        // For binary and certificate rules, force the hash identifier to be lowercase hex.
+        identifier = [identifier lowercaseString];
+
+        identifier = [identifier stringByTrimmingCharactersInSet:nonHex];
+        if (identifier.length != (CC_SHA256_DIGEST_LENGTH * 2)) {
+          return nil;
+        }
+
+        break;
+      }
+
+      case SNTRuleTypeTeamID: {
+        // TeamIDs are always [0-9A-Z], so enforce that the identifier is uppercase
+        identifier =
+          [[identifier uppercaseString] stringByTrimmingCharactersInSet:nonUppercaseAlphaNumeric];
+        if (identifier.length != kExpectedTeamIDLength) {
+          return nil;
+        }
+
+        break;
+      }
+
+      case SNTRuleTypeSigningID: {
+        // SigningID rules are a combination of `TeamID:SigningID`. The TeamID should
+        // be forced to be uppercase, but because very loose rules exist for SigningIDs,
+        // their case will be kept as-is. However, platform binaries are expected to
+        // have the hardcoded string "platform" as the team ID and the case will be left
+        // as is.
+        NSArray *sidComponents = [identifier componentsSeparatedByString:@":"];
+        if (!sidComponents || sidComponents.count < 2) {
+          return nil;
+        }
+
+        // The first component is the TeamID
+        NSString *teamID = sidComponents[0];
+
+        if (![teamID isEqualToString:@"platform"]) {
+          teamID =
+            [[teamID uppercaseString] stringByTrimmingCharactersInSet:nonUppercaseAlphaNumeric];
+          if (teamID.length != kExpectedTeamIDLength) {
+            return nil;
+          }
+        }
+
+        // The rest of the components are the Signing ID since ":" a legal character.
+        // Join all but the last element of the components to rebuild the SigningID.
+        NSString *signingID = [[sidComponents
+          subarrayWithRange:NSMakeRange(1, sidComponents.count - 1)] componentsJoinedByString:@":"];
+        if (signingID.length == 0) {
+          return nil;
+        }
+
+        identifier = [NSString stringWithFormat:@"%@:%@", teamID, signingID];
+        break;
+      }
+
+      default: {
+        break;
+      }
+    }
+
     _identifier = identifier;
     _state = state;
     _type = type;
@@ -55,52 +135,61 @@
 - (instancetype)initWithDictionary:(NSDictionary *)dict {
   if (![dict isKindOfClass:[NSDictionary class]]) return nil;
 
-  self = [super init];
-  if (self) {
-    _identifier = dict[kRuleIdentifier];
-    if (![_identifier isKindOfClass:[NSString class]] || !_identifier.length) {
-      _identifier = dict[kRuleSHA256];
-    }
-    if (![_identifier isKindOfClass:[NSString class]] || !_identifier.length) return nil;
-
-    NSString *policyString = dict[kRulePolicy];
-    if (![policyString isKindOfClass:[NSString class]]) return nil;
-    if ([policyString isEqual:kRulePolicyAllowlist] ||
-        [policyString isEqual:kRulePolicyAllowlistDeprecated]) {
-      _state = SNTRuleStateAllow;
-    } else if ([policyString isEqual:kRulePolicyAllowlistCompiler] ||
-               [policyString isEqual:kRulePolicyAllowlistCompilerDeprecated]) {
-      _state = SNTRuleStateAllowCompiler;
-    } else if ([policyString isEqual:kRulePolicyBlocklist] ||
-               [policyString isEqual:kRulePolicyBlocklistDeprecated]) {
-      _state = SNTRuleStateBlock;
-    } else if ([policyString isEqual:kRulePolicySilentBlocklist] ||
-               [policyString isEqual:kRulePolicySilentBlocklistDeprecated]) {
-      _state = SNTRuleStateSilentBlock;
-    } else if ([policyString isEqual:kRulePolicyRemove]) {
-      _state = SNTRuleStateRemove;
-    } else {
-      return nil;
-    }
-
-    NSString *ruleTypeString = dict[kRuleType];
-    if (![ruleTypeString isKindOfClass:[NSString class]]) return nil;
-    if ([ruleTypeString isEqual:kRuleTypeBinary]) {
-      _type = SNTRuleTypeBinary;
-    } else if ([ruleTypeString isEqual:kRuleTypeCertificate]) {
-      _type = SNTRuleTypeCertificate;
-    } else if ([ruleTypeString isEqual:kRuleTypeTeamID]) {
-      _type = SNTRuleTypeTeamID;
-    } else {
-      return nil;
-    }
-
-    NSString *customMsg = dict[kRuleCustomMsg];
-    if ([customMsg isKindOfClass:[NSString class]] && customMsg.length) {
-      _customMsg = customMsg;
-    }
+  NSString *identifier = dict[kRuleIdentifier];
+  if (![identifier isKindOfClass:[NSString class]] || !identifier.length) {
+    identifier = dict[kRuleSHA256];
   }
-  return self;
+  if (![identifier isKindOfClass:[NSString class]] || !identifier.length) return nil;
+
+  NSString *policyString = dict[kRulePolicy];
+  SNTRuleState state;
+  if (![policyString isKindOfClass:[NSString class]]) return nil;
+  if ([policyString isEqual:kRulePolicyAllowlist] ||
+      [policyString isEqual:kRulePolicyAllowlistDeprecated]) {
+    state = SNTRuleStateAllow;
+  } else if ([policyString isEqual:kRulePolicyAllowlistCompiler] ||
+             [policyString isEqual:kRulePolicyAllowlistCompilerDeprecated]) {
+    state = SNTRuleStateAllowCompiler;
+  } else if ([policyString isEqual:kRulePolicyBlocklist] ||
+             [policyString isEqual:kRulePolicyBlocklistDeprecated]) {
+    state = SNTRuleStateBlock;
+  } else if ([policyString isEqual:kRulePolicySilentBlocklist] ||
+             [policyString isEqual:kRulePolicySilentBlocklistDeprecated]) {
+    state = SNTRuleStateSilentBlock;
+  } else if ([policyString isEqual:kRulePolicyRemove]) {
+    state = SNTRuleStateRemove;
+  } else {
+    return nil;
+  }
+
+  NSString *ruleTypeString = dict[kRuleType];
+  SNTRuleType type;
+  if (![ruleTypeString isKindOfClass:[NSString class]]) return nil;
+  if ([ruleTypeString isEqual:kRuleTypeBinary]) {
+    type = SNTRuleTypeBinary;
+  } else if ([ruleTypeString isEqual:kRuleTypeCertificate]) {
+    type = SNTRuleTypeCertificate;
+  } else if ([ruleTypeString isEqual:kRuleTypeTeamID]) {
+    type = SNTRuleTypeTeamID;
+  } else if ([ruleTypeString isEqual:kRuleTypeSigningID]) {
+    type = SNTRuleTypeSigningID;
+  } else {
+    return nil;
+  }
+
+  NSString *customMsg = dict[kRuleCustomMsg];
+  if (![customMsg isKindOfClass:[NSString class]] || customMsg.length == 0) {
+    customMsg = nil;
+  }
+
+  NSString *customURL = dict[kRuleCustomURL];
+  if (![customURL isKindOfClass:[NSString class]] || customURL.length == 0) {
+    customURL = nil;
+  }
+
+  SNTRule *r = [self initWithIdentifier:identifier state:state type:type customMsg:customMsg];
+  r.customURL = customURL;
+  return r;
 }
 
 #pragma mark NSSecureCoding
@@ -120,6 +209,7 @@
   ENCODE(@(self.state), @"state");
   ENCODE(@(self.type), @"type");
   ENCODE(self.customMsg, @"custommsg");
+  ENCODE(self.customURL, @"customurl");
   ENCODE(@(self.timestamp), @"timestamp");
 }
 
@@ -130,11 +220,49 @@
     _state = [DECODE(NSNumber, @"state") intValue];
     _type = [DECODE(NSNumber, @"type") intValue];
     _customMsg = DECODE(NSString, @"custommsg");
+    _customURL = DECODE(NSString, @"customurl");
     _timestamp = [DECODE(NSNumber, @"timestamp") unsignedIntegerValue];
   }
   return self;
 }
 
+- (NSString *)ruleStateToPolicyString:(SNTRuleState)state {
+  switch (state) {
+    case SNTRuleStateAllow: return kRulePolicyAllowlist;
+    case SNTRuleStateAllowCompiler: return kRulePolicyAllowlistCompiler;
+    case SNTRuleStateBlock: return kRulePolicyBlocklist;
+    case SNTRuleStateSilentBlock: return kRulePolicySilentBlocklist;
+    case SNTRuleStateRemove: return kRulePolicyRemove;
+    case SNTRuleStateAllowTransitive: return @"AllowTransitive";
+    // This should never be hit. But is here for completion.
+    default: return @"Unknown";
+  }
+}
+
+- (NSString *)ruleTypeToString:(SNTRuleType)ruleType {
+  switch (ruleType) {
+    case SNTRuleTypeBinary: return kRuleTypeBinary;
+    case SNTRuleTypeCertificate: return kRuleTypeCertificate;
+    case SNTRuleTypeTeamID: return kRuleTypeTeamID;
+    case SNTRuleTypeSigningID: return kRuleTypeSigningID;
+    // This should never be hit. If we have rule types of Unknown then there's a
+    // coding error somewhere.
+    default: return @"Unknown";
+  }
+}
+
+// Returns an NSDictionary representation of the rule. Primarily use for
+// exporting rules.
+- (NSDictionary *)dictionaryRepresentation {
+  return @{
+    kRuleIdentifier : self.identifier,
+    kRulePolicy : [self ruleStateToPolicyString:self.state],
+    kRuleType : [self ruleTypeToString:self.type],
+    kRuleCustomMsg : self.customMsg ?: @"",
+    kRuleCustomURL : self.customURL ?: @""
+  };
+}
+
 #undef DECODE
 #undef ENCODE
 #pragma clang diagnostic pop

Source/common/SNTRuleTest.m

@@ -13,6 +13,8 @@
 ///    limitations under the License.
 
 #import <XCTest/XCTest.h>
+#include "Source/common/SNTCommonEnums.h"
+#import "Source/common/SNTSyncConstants.h"
 
 #import "Source/common/SNTRule.h"
 
@@ -25,66 +27,169 @@
   SNTRule *sut;
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"some-sort-of-identifier",
+    @"identifier" : @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670",
     @"policy" : @"ALLOWLIST",
     @"rule_type" : @"BINARY",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier,
+                        @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670");
   XCTAssertEqual(sut.type, SNTRuleTypeBinary);
   XCTAssertEqual(sut.state, SNTRuleStateAllow);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"sha256" : @"some-sort-of-identifier",
+    @"sha256" : @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670",
     @"policy" : @"BLOCKLIST",
     @"rule_type" : @"CERTIFICATE",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier,
+                        @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670");
   XCTAssertEqual(sut.type, SNTRuleTypeCertificate);
   XCTAssertEqual(sut.state, SNTRuleStateBlock);
 
+  // Ensure a Binary and Certificate rules properly convert identifiers to lowercase.
+  for (NSString *ruleType in @[ @"BINARY", @"CERTIFICATE" ]) {
+    sut = [[SNTRule alloc] initWithDictionary:@{
+      @"identifier" : @"B7C1E3FD640C5F211C89B02C2C6122F78CE322AA5C56EB0BB54BC422A8F8B670",
+      @"policy" : @"BLOCKLIST",
+      @"rule_type" : ruleType,
+    }];
+    XCTAssertNotNil(sut);
+    XCTAssertEqualObjects(sut.identifier,
+                          @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670");
+  }
+
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"some-sort-of-identifier",
+    @"identifier" : @"ABCDEFGHIJ",
     @"policy" : @"SILENT_BLOCKLIST",
     @"rule_type" : @"TEAMID",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ");
   XCTAssertEqual(sut.type, SNTRuleTypeTeamID);
   XCTAssertEqual(sut.state, SNTRuleStateSilentBlock);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"some-sort-of-identifier",
+    @"identifier" : @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670",
     @"policy" : @"ALLOWLIST_COMPILER",
     @"rule_type" : @"BINARY",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier,
+                        @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670");
   XCTAssertEqual(sut.type, SNTRuleTypeBinary);
   XCTAssertEqual(sut.state, SNTRuleStateAllowCompiler);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"some-sort-of-identifier",
+    @"identifier" : @"ABCDEFGHIJ",
     @"policy" : @"REMOVE",
     @"rule_type" : @"TEAMID",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ");
   XCTAssertEqual(sut.type, SNTRuleTypeTeamID);
   XCTAssertEqual(sut.state, SNTRuleStateRemove);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"some-sort-of-identifier",
+    @"identifier" : @"ABCDEFGHIJ",
     @"policy" : @"ALLOWLIST",
     @"rule_type" : @"TEAMID",
     @"custom_msg" : @"A custom block message",
+    @"custom_url" : @"https://example.com",
   }];
   XCTAssertNotNil(sut);
-  XCTAssertEqualObjects(sut.identifier, @"some-sort-of-identifier");
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ");
   XCTAssertEqual(sut.type, SNTRuleTypeTeamID);
   XCTAssertEqual(sut.state, SNTRuleStateAllow);
   XCTAssertEqualObjects(sut.customMsg, @"A custom block message");
+  XCTAssertEqualObjects(sut.customURL, @"https://example.com");
+
+  // TeamIDs must be 10 chars in length
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"A",
+    @"policy" : @"ALLOWLIST",
+    @"rule_type" : @"TEAMID",
+  }];
+  XCTAssertNil(sut);
+
+  // TeamIDs must be only alphanumeric chars
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"ßßßßßßßßßß",
+    @"policy" : @"ALLOWLIST",
+    @"rule_type" : @"TEAMID",
+  }];
+  XCTAssertNil(sut);
+
+  // TeamIDs are converted to uppercase
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"abcdefghij",
+    @"policy" : @"REMOVE",
+    @"rule_type" : @"TEAMID",
+  }];
+  XCTAssertNotNil(sut);
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ");
+
+  // SigningID tests
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"ABCDEFGHIJ:com.example",
+    @"policy" : @"REMOVE",
+    @"rule_type" : @"SIGNINGID",
+  }];
+  XCTAssertNotNil(sut);
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ:com.example");
+  XCTAssertEqual(sut.type, SNTRuleTypeSigningID);
+  XCTAssertEqual(sut.state, SNTRuleStateRemove);
+
+  // Invalid SingingID tests:
+  for (NSString *ident in @[
+         @":com.example",     // missing team ID
+         @"ABCDEFGHIJ:",      // missing signing ID
+         @"ABC:com.example",  // Invalid team id
+         @":",                // missing team and signing IDs
+         @"",                 // empty string
+       ]) {
+    sut = [[SNTRule alloc] initWithDictionary:@{
+      @"identifier" : ident,
+      @"policy" : @"REMOVE",
+      @"rule_type" : @"SIGNINGID",
+    }];
+    XCTAssertNil(sut);
+  }
+
+  // Signing ID with lower team ID has case fixed up
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"abcdefghij:com.example",
+    @"policy" : @"REMOVE",
+    @"rule_type" : @"SIGNINGID",
+  }];
+  XCTAssertNotNil(sut);
+  XCTAssertEqualObjects(sut.identifier, @"ABCDEFGHIJ:com.example");
+
+  // Signing ID with lower platform team ID is left alone
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"platform:com.example",
+    @"policy" : @"REMOVE",
+    @"rule_type" : @"SIGNINGID",
+  }];
+  XCTAssertNotNil(sut);
+  XCTAssertEqualObjects(sut.identifier, @"platform:com.example");
+
+  // Signing ID can contain the TID:SID delimiter character (":")
+  for (NSString *ident in @[
+         @"ABCDEFGHIJ:com:",
+         @"ABCDEFGHIJ:com:example",
+         @"ABCDEFGHIJ::",
+         @"ABCDEFGHIJ:com:example:with:more:components:",
+       ]) {
+    sut = [[SNTRule alloc] initWithDictionary:@{
+      @"identifier" : ident,
+      @"policy" : @"ALLOWLIST",
+      @"rule_type" : @"SIGNINGID",
+    }];
+    XCTAssertNotNil(sut);
+    XCTAssertEqualObjects(sut.identifier, ident);
+  }
 }
 
 - (void)testInitWithDictionaryInvalid {
@@ -94,12 +199,19 @@
   XCTAssertNil(sut);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
-    @"identifier" : @"an-identifier",
+    @"identifier" : @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670",
   }];
   XCTAssertNil(sut);
 
   sut = [[SNTRule alloc] initWithDictionary:@{
     @"identifier" : @"an-identifier",
+    @"policy" : @"ALLOWLIST",
+    @"rule_type" : @"BINARY",
+  }];
+  XCTAssertNil(sut);
+
+  sut = [[SNTRule alloc] initWithDictionary:@{
+    @"identifier" : @"b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670",
     @"policy" : @"OTHERPOLICY",
     @"rule_type" : @"BINARY",
   }];
@@ -113,4 +225,63 @@
   XCTAssertNil(sut);
 }
 
+- (void)testRuleDictionaryRepresentation {
+  NSDictionary *expectedTeamID = @{
+    @"identifier" : @"ABCDEFGHIJ",
+    @"policy" : @"ALLOWLIST",
+    @"rule_type" : @"TEAMID",
+    @"custom_msg" : @"A custom block message",
+    @"custom_url" : @"https://example.com",
+  };
+
+  SNTRule *sut = [[SNTRule alloc] initWithDictionary:expectedTeamID];
+  NSDictionary *dict = [sut dictionaryRepresentation];
+  XCTAssertEqualObjects(expectedTeamID, dict);
+
+  NSDictionary *expectedBinary = @{
+    @"identifier" : @"84de9c61777ca36b13228e2446d53e966096e78db7a72c632b5c185b2ffe68a6",
+    @"policy" : @"BLOCKLIST",
+    @"rule_type" : @"BINARY",
+    @"custom_msg" : @"",
+    @"custom_url" : @"",
+  };
+
+  sut = [[SNTRule alloc] initWithDictionary:expectedBinary];
+  dict = [sut dictionaryRepresentation];
+
+  XCTAssertEqualObjects(expectedBinary, dict);
+}
+
+- (void)testRuleStateToPolicyString {
+  NSDictionary *expected = @{
+    @"identifier" : @"84de9c61777ca36b13228e2446d53e966096e78db7a72c632b5c185b2ffe68a6",
+    @"policy" : @"ALLOWLIST",
+    @"rule_type" : @"BINARY",
+    @"custom_msg" : @"A custom block message",
+    @"custom_url" : @"https://example.com",
+  };
+
+  SNTRule *sut = [[SNTRule alloc] initWithDictionary:expected];
+  sut.state = SNTRuleStateBlock;
+  XCTAssertEqualObjects(kRulePolicyBlocklist, [sut dictionaryRepresentation][kRulePolicy]);
+  sut.state = SNTRuleStateSilentBlock;
+  XCTAssertEqualObjects(kRulePolicySilentBlocklist, [sut dictionaryRepresentation][kRulePolicy]);
+  sut.state = SNTRuleStateAllow;
+  XCTAssertEqualObjects(kRulePolicyAllowlist, [sut dictionaryRepresentation][kRulePolicy]);
+  sut.state = SNTRuleStateAllowCompiler;
+  XCTAssertEqualObjects(kRulePolicyAllowlistCompiler, [sut dictionaryRepresentation][kRulePolicy]);
+  // Invalid states
+  sut.state = SNTRuleStateRemove;
+  XCTAssertEqualObjects(kRulePolicyRemove, [sut dictionaryRepresentation][kRulePolicy]);
+}
+
+/*
+- (void)testRuleTypeToString {
+  SNTRule *sut = [[SNTRule alloc] init];
+  XCTAssertEqual(kRuleTypeBinary, [sut ruleTypeToString:@""]);//SNTRuleTypeBinary]);
+  XCTAssertEqual(kRuleTypeCertificate,[sut ruleTypeToString:SNTRuleTypeCertificate]);
+  XCTAssertEqual(kRuleTypeTeamID, [sut ruleTypeToString:SNTRuleTypeTeamID]);
+  XCTAssertEqual(kRuleTypeSigningID,[sut ruleTypeToString:SNTRuleTypeSigningID]);
+}*/
+
 @end

Source/common/SNTStoredEvent.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -95,12 +95,16 @@
 ///
 @property NSArray *signingChain;
 
-
 ///
 /// If the executed file was signed, this is the Team ID if present in the signature information.
 ///
 @property NSString *teamID;
 
+///
+/// If the executed file was signed, this is the Signing ID if present in the signature information.
+///
+@property NSString *signingID;
+
 ///
 ///  The user who executed the binary.
 ///

Source/common/SNTStoredEvent.m

@@ -50,6 +50,7 @@
 
   ENCODE(self.signingChain, @"signingChain");
   ENCODE(self.teamID, @"teamID");
+  ENCODE(self.signingID, @"signingID");
 
   ENCODE(self.executingUser, @"executingUser");
   ENCODE(self.occurrenceDate, @"occurrenceDate");
@@ -95,10 +96,11 @@
 
     _signingChain = DECODEARRAY(MOLCertificate, @"signingChain");
     _teamID = DECODE(NSString, @"teamID");
+    _signingID = DECODE(NSString, @"signingID");
 
     _executingUser = DECODE(NSString, @"executingUser");
     _occurrenceDate = DECODE(NSDate, @"occurrenceDate");
-    _decision = (SNTEventState)[DECODE(NSNumber, @"decision") intValue];
+    _decision = (SNTEventState)[DECODE(NSNumber, @"decision") unsignedLongLongValue];
     _pid = DECODE(NSNumber, @"pid");
     _ppid = DECODE(NSNumber, @"ppid");
     _parentName = DECODE(NSString, @"parentName");

Source/common/SNTStrengthify.h

@@ -1,4 +1,4 @@
-/// Copyright 2016 Google Inc. All rights reserved.
+/// Copyright 2016-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -12,10 +12,14 @@
 ///    See the License for the specific language governing permissions and
 ///    limitations under the License.
 
-#define STRONGIFY(var)                                 \
-  _Pragma("clang diagnostic push")                     \
-      _Pragma("clang diagnostic ignored \"-Wshadow\"") \
-          __strong __typeof(var) var = (Weak_##var);   \
+// clang-format off
+
+#define STRONGIFY(var)                             \
+  _Pragma("clang diagnostic push")                 \
+  _Pragma("clang diagnostic ignored \"-Wshadow\"") \
+  __strong __typeof(var) var = (Weak_##var);   \
   _Pragma("clang diagnostic pop")
 
 #define WEAKIFY(var) __weak __typeof(var) Weak_##var = (var);
+
+// clang-format on

Source/common/SNTSyncConstants.h

@@ -14,7 +14,8 @@
 
 #import <Foundation/Foundation.h>
 
-extern NSString *const kXSRFToken;
+extern NSString *const kDefaultXSRFTokenHeader;
+extern NSString *const kXSRFTokenHeader;
 
 extern NSString *const kSerialNumber;
 extern NSString *const kHostname;
@@ -41,6 +42,7 @@ extern NSString *const kCertificateRuleCount;
 extern NSString *const kCompilerRuleCount;
 extern NSString *const kTransitiveRuleCount;
 extern NSString *const kTeamIDRuleCount;
+extern NSString *const kSigningIDRuleCount;
 extern NSString *const kFullSyncInterval;
 extern NSString *const kFCMToken;
 extern NSString *const kFCMFullSyncInterval;
@@ -52,6 +54,7 @@ extern NSString *const kEnableTransitiveRulesDeprecated;
 extern NSString *const kEnableTransitiveRulesSuperDeprecated;
 extern NSString *const kEnableAllEventUpload;
 extern NSString *const kDisableUnknownEventUpload;
+extern NSString *const kOverrideFileAccessAction;
 
 extern NSString *const kEvents;
 extern NSString *const kFileSHA256;
@@ -65,11 +68,13 @@ extern NSString *const kDecisionAllowBinary;
 extern NSString *const kDecisionAllowCertificate;
 extern NSString *const kDecisionAllowScope;
 extern NSString *const kDecisionAllowTeamID;
+extern NSString *const kDecisionAllowSigningID;
 extern NSString *const kDecisionBlockUnknown;
 extern NSString *const kDecisionBlockBinary;
 extern NSString *const kDecisionBlockCertificate;
 extern NSString *const kDecisionBlockScope;
 extern NSString *const kDecisionBlockTeamID;
+extern NSString *const kDecisionBlockSigningID;
 extern NSString *const kDecisionUnknown;
 extern NSString *const kDecisionBundleBinary;
 extern NSString *const kLoggedInUsers;
@@ -94,6 +99,7 @@ extern NSString *const kCertOU;
 extern NSString *const kCertValidFrom;
 extern NSString *const kCertValidUntil;
 extern NSString *const kTeamID;
+extern NSString *const kSigningID;
 extern NSString *const kQuarantineDataURL;
 extern NSString *const kQuarantineRefererURL;
 extern NSString *const kQuarantineTimestamp;
@@ -117,7 +123,9 @@ extern NSString *const kRuleType;
 extern NSString *const kRuleTypeBinary;
 extern NSString *const kRuleTypeCertificate;
 extern NSString *const kRuleTypeTeamID;
+extern NSString *const kRuleTypeSigningID;
 extern NSString *const kRuleCustomMsg;
+extern NSString *const kRuleCustomURL;
 extern NSString *const kCursor;
 
 extern NSString *const kBackoffInterval;
@@ -129,6 +137,9 @@ extern NSString *const kLogSync;
 
 extern const NSUInteger kDefaultEventBatchSize;
 
+extern NSString *const kPostflightRulesReceived;
+extern NSString *const kPostflightRulesProcessed;
+
 ///
 ///  kDefaultFullSyncInterval
 ///  kDefaultFCMFullSyncInterval

Source/common/SNTSyncConstants.m

@@ -14,7 +14,8 @@
 
 #import "Source/common/SNTSyncConstants.h"
 
-NSString *const kXSRFToken = @"X-XSRF-TOKEN";
+NSString *const kDefaultXSRFTokenHeader = @"X-XSRF-TOKEN";
+NSString *const kXSRFTokenHeader = @"X-XSRF-TOKEN-HEADER";
 
 NSString *const kSerialNumber = @"serial_num";
 NSString *const kHostname = @"hostname";
@@ -41,10 +42,12 @@ NSString *const kCertificateRuleCount = @"certificate_rule_count";
 NSString *const kCompilerRuleCount = @"compiler_rule_count";
 NSString *const kTransitiveRuleCount = @"transitive_rule_count";
 NSString *const kTeamIDRuleCount = @"teamid_rule_count";
+NSString *const kSigningIDRuleCount = @"signingid_rule_count";
 NSString *const kFullSyncInterval = @"full_sync_interval";
 NSString *const kFCMToken = @"fcm_token";
 NSString *const kFCMFullSyncInterval = @"fcm_full_sync_interval";
 NSString *const kFCMGlobalRuleSyncDeadline = @"fcm_global_rule_sync_deadline";
+NSString *const kOverrideFileAccessAction = @"override_file_access_action";
 
 NSString *const kEnableBundles = @"enable_bundles";
 NSString *const kEnableBundlesDeprecated = @"bundles_enabled";
@@ -66,11 +69,13 @@ NSString *const kDecisionAllowBinary = @"ALLOW_BINARY";
 NSString *const kDecisionAllowCertificate = @"ALLOW_CERTIFICATE";
 NSString *const kDecisionAllowScope = @"ALLOW_SCOPE";
 NSString *const kDecisionAllowTeamID = @"ALLOW_TEAMID";
+NSString *const kDecisionAllowSigningID = @"ALLOW_SIGNINGID";
 NSString *const kDecisionBlockUnknown = @"BLOCK_UNKNOWN";
 NSString *const kDecisionBlockBinary = @"BLOCK_BINARY";
 NSString *const kDecisionBlockCertificate = @"BLOCK_CERTIFICATE";
 NSString *const kDecisionBlockScope = @"BLOCK_SCOPE";
 NSString *const kDecisionBlockTeamID = @"BLOCK_TEAMID";
+NSString *const kDecisionBlockSigningID = @"BLOCK_SIGNINGID";
 NSString *const kDecisionUnknown = @"UNKNOWN";
 NSString *const kDecisionBundleBinary = @"BUNDLE_BINARY";
 NSString *const kLoggedInUsers = @"logged_in_users";
@@ -95,6 +100,7 @@ NSString *const kCertOU = @"ou";
 NSString *const kCertValidFrom = @"valid_from";
 NSString *const kCertValidUntil = @"valid_until";
 NSString *const kTeamID = @"team_id";
+NSString *const kSigningID = @"signing_id";
 NSString *const kQuarantineDataURL = @"quarantine_data_url";
 NSString *const kQuarantineRefererURL = @"quarantine_referer_url";
 NSString *const kQuarantineTimestamp = @"quarantine_timestamp";
@@ -118,7 +124,9 @@ NSString *const kRuleType = @"rule_type";
 NSString *const kRuleTypeBinary = @"BINARY";
 NSString *const kRuleTypeCertificate = @"CERTIFICATE";
 NSString *const kRuleTypeTeamID = @"TEAMID";
+NSString *const kRuleTypeSigningID = @"SIGNINGID";
 NSString *const kRuleCustomMsg = @"custom_msg";
+NSString *const kRuleCustomURL = @"custom_url";
 NSString *const kCursor = @"cursor";
 
 NSString *const kBackoffInterval = @"backoff";
@@ -128,6 +136,9 @@ NSString *const kRuleSync = @"rule_sync";
 NSString *const kConfigSync = @"config_sync";
 NSString *const kLogSync = @"log_sync";
 
+NSString *const kPostflightRulesReceived = @"rules_received";
+NSString *const kPostflightRulesProcessed = @"rules_processed";
+
 const NSUInteger kDefaultEventBatchSize = 50;
 const NSUInteger kDefaultFullSyncInterval = 600;
 const NSUInteger kDefaultPushNotificationsFullSyncInterval = 14400;

Source/common/SNTSystemInfo.m

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -18,8 +18,11 @@
 @implementation SNTSystemInfo
 
 + (NSString *)serialNumber {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
   io_service_t platformExpert =
     IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));
+#pragma clang diagnostic pop
   if (!platformExpert) return nil;
 
   NSString *serial = CFBridgingRelease(IORegistryEntryCreateCFProperty(
@@ -31,8 +34,11 @@
 }
 
 + (NSString *)hardwareUUID {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
   io_service_t platformExpert =
     IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"));
+#pragma clang diagnostic pop
   if (!platformExpert) return nil;
 
   NSString *uuid = CFBridgingRelease(IORegistryEntryCreateCFProperty(

Source/common/SNTXPCControlInterface.h

@@ -35,7 +35,9 @@
 - (void)databaseRuleForBinarySHA256:(NSString *)binarySHA256
                   certificateSHA256:(NSString *)certificateSHA256
                              teamID:(NSString *)teamID
+                          signingID:(NSString *)signingID
                               reply:(void (^)(SNTRule *))reply;
+- (void)retrieveAllRules:(void (^)(NSArray<SNTRule *> *rules, NSError *error))reply;
 
 ///
 ///  Config ops
@@ -52,6 +54,7 @@
 - (void)setEnableTransitiveRules:(BOOL)enabled reply:(void (^)(void))reply;
 - (void)setEnableAllEventUpload:(BOOL)enabled reply:(void (^)(void))reply;
 - (void)setDisableUnknownEventUpload:(BOOL)enabled reply:(void (^)(void))reply;
+- (void)setOverrideFileAccessAction:(NSString *)action reply:(void (^)(void))reply;
 
 ///
 ///  Syncd Ops

Source/common/SNTXPCControlInterface.m

@@ -53,6 +53,11 @@ NSString *const kBundleID = @"com.google.santa.daemon";
       forSelector:@selector(databaseRuleAddRules:cleanSlate:reply:)
     argumentIndex:0
           ofReply:NO];
+
+  [r setClasses:[NSSet setWithObjects:[NSArray class], [SNTRule class], nil]
+      forSelector:@selector(retrieveAllRules:)
+    argumentIndex:0
+          ofReply:YES];
 }
 
 + (NSXPCInterface *)controlInterface {

Source/common/SNTXPCNotifierInterface.h

@@ -17,13 +17,20 @@
 #import "Source/common/SNTCommonEnums.h"
 #import "Source/common/SNTXPCBundleServiceInterface.h"
 
-@class SNTStoredEvent;
 @class SNTDeviceEvent;
+@class SNTFileAccessEvent;
+@class SNTStoredEvent;
 
 /// Protocol implemented by SantaGUI and utilized by santad
 @protocol SNTNotifierXPC
-- (void)postBlockNotification:(SNTStoredEvent *)event withCustomMessage:(NSString *)message;
+- (void)postBlockNotification:(SNTStoredEvent *)event
+            withCustomMessage:(NSString *)message
+                 andCustomURL:(NSString *)url;
 - (void)postUSBBlockNotification:(SNTDeviceEvent *)event withCustomMessage:(NSString *)message;
+- (void)postFileAccessBlockNotification:(SNTFileAccessEvent *)event
+                          customMessage:(NSString *)message
+                              customURL:(NSString *)url
+                             customText:(NSString *)text API_AVAILABLE(macos(13.0));
 - (void)postClientModeNotification:(SNTClientMode)clientmode;
 - (void)postRuleSyncNotificationWithCustomMessage:(NSString *)message;
 - (void)updateCountsForEvent:(SNTStoredEvent *)event

Source/common/SNTXPCUnprivilegedControlInterface.h

@@ -1,4 +1,4 @@
-/// Copyright 2015 Google Inc. All rights reserved.
+/// Copyright 2015-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 #import <MOLCertificate/MOLCertificate.h>
 
 #import "Source/common/SNTCommonEnums.h"
-#import "Source/common/SNTCommon.h"
+#import "Source/common/SantaVnode.h"
 
 @class SNTRule;
 @class SNTStoredEvent;
@@ -31,14 +31,13 @@
 ///  Cache Ops
 ///
 - (void)cacheCounts:(void (^)(uint64_t rootCache, uint64_t nonRootCache))reply;
-- (void)cacheBucketCount:(void (^)(NSArray *))reply;
-- (void)checkCacheForVnodeID:(santa_vnode_id_t)vnodeID withReply:(void (^)(santa_action_t))reply;
+- (void)checkCacheForVnodeID:(SantaVnode)vnodeID withReply:(void (^)(SNTAction))reply;
 
 ///
 ///  Database ops
 ///
 - (void)databaseRuleCounts:(void (^)(int64_t binary, int64_t certificate, int64_t compiler,
-                                     int64_t transitive, int64_t teamID))reply;
+                                     int64_t transitive, int64_t teamID, int64_t signingID))reply;
 - (void)databaseEventCount:(void (^)(int64_t count))reply;
 - (void)staticRuleCount:(void (^)(int64_t count))reply;
 
@@ -58,12 +57,14 @@
                  fileSHA256:(NSString *)fileSHA256
           certificateSHA256:(NSString *)certificateSHA256
                      teamID:(NSString *)teamID
+                  signingID:(NSString *)signingID
                       reply:(void (^)(SNTEventState))reply;
 
 ///
 ///  Config ops
 ///
 - (void)watchdogInfo:(void (^)(uint64_t, uint64_t, double, double))reply;
+- (void)watchItemsState:(void (^)(BOOL, uint64_t, NSString *, NSString *, NSTimeInterval))reply;
 - (void)clientMode:(void (^)(SNTClientMode))reply;
 - (void)fullSyncLastSuccess:(void (^)(NSDate *))reply;
 - (void)ruleSyncLastSuccess:(void (^)(NSDate *))reply;

Source/common/SantaCache.h

@@ -1,4 +1,4 @@
-/// Copyright 2016 Google Inc. All rights reserved.
+/// Copyright 2016-2022 Google Inc. All rights reserved.
 ///
 /// Licensed under the Apache License, Version 2.0 (the "License");
 /// you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 
 #include <libkern/OSAtomic.h>
 #include <libkern/OSTypes.h>
+#include <os/log.h>
 #include <stdint.h>
 #include <sys/cdefs.h>
 
@@ -24,12 +25,7 @@
 #include <cstdlib>
 #include <cstring>
 
-#include "Source/common/SNTCommon.h"
-
-#define panic(args...) \
-  printf(args);        \
-  printf("\n");        \
-  abort()
+#include "Source/common/BranchPrediction.h"
 
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
@@ -334,7 +330,9 @@ class SantaCache {
   inline void unlock(struct bucket *bucket) const {
     if (unlikely(OSAtomicTestAndClear(7, (volatile uint8_t *)&bucket->head) ==
                  0)) {
-      panic("SantaCache::unlock(): Tried to unlock an unlocked lock");
+      os_log_error(OS_LOG_DEFAULT,
+                   "SantaCache::unlock(): Tried to unlock an unlocked lock");
+      abort();
     }
   }
 

Source/common/SantaVnode.h

@@ -0,0 +1,44 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__SANTAVNODE_H
+#define SANTA__COMMON__SANTAVNODE_H
+
+#include <EndpointSecurity/EndpointSecurity.h>
+#include <sys/types.h>
+
+// Struct to manage vnode IDs
+typedef struct SantaVnode {
+  dev_t fsid;
+  ino_t fileid;
+
+#ifdef __cplusplus
+  bool operator==(const SantaVnode &rhs) const {
+    return fsid == rhs.fsid && fileid == rhs.fileid;
+  }
+
+  static inline SantaVnode VnodeForFile(const struct stat &sb) {
+    return SantaVnode{
+        .fsid = sb.st_dev,
+        .fileid = sb.st_ino,
+    };
+  }
+
+  static inline SantaVnode VnodeForFile(const es_file_t *es_file) {
+    return VnodeForFile(es_file->stat);
+  }
+#endif
+} SantaVnode;
+
+#endif

Source/common/SantaVnodeHash.h

@@ -0,0 +1,24 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__SANTAVNODEHASH_H
+#define SANTA__COMMON__SANTAVNODEHASH_H
+
+#include "Source/common/SantaCache.h"
+#include "Source/common/SantaVnode.h"
+
+template <>
+uint64_t SantaCacheHasher<SantaVnode>(SantaVnode const &t);
+
+#endif

Source/common/SantaVnodeHash.mm

@@ -0,0 +1,20 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#include "Source/common/SantaVnodeHash.h"
+
+template <>
+uint64_t SantaCacheHasher<SantaVnode>(SantaVnode const &t) {
+  return (SantaCacheHasher<uint64_t>(t.fsid) << 1) ^ SantaCacheHasher<uint64_t>(t.fileid);
+}

Source/common/String.h

@@ -0,0 +1,53 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__STRING_H
+#define SANTA__COMMON__STRING_H
+
+#include <Foundation/Foundation.h>
+
+#include <optional>
+#include <string>
+#include <string_view>
+
+namespace santa::common {
+
+static inline std::string_view NSStringToUTF8StringView(NSString *str) {
+  return std::string_view(str.UTF8String, [str lengthOfBytesUsingEncoding:NSUTF8StringEncoding]);
+}
+
+static inline std::string NSStringToUTF8String(NSString *str) {
+  return std::string(str.UTF8String, [str lengthOfBytesUsingEncoding:NSUTF8StringEncoding]);
+}
+
+static inline NSString *StringToNSString(const std::string &str) {
+  return [NSString stringWithUTF8String:str.c_str()];
+}
+
+static inline NSString *StringToNSString(const char *str) {
+  return [NSString stringWithUTF8String:str];
+}
+
+static inline NSString *OptionalStringToNSString(const std::optional<std::string> &optional_str) {
+  std::string str = optional_str.value_or("");
+  if (str.length() == 0) {
+    return nil;
+  } else {
+    return StringToNSString(str);
+  }
+}
+
+}  // namespace santa::common
+
+#endif

Source/common/SystemResources.h

@@ -0,0 +1,44 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__SYSTEMRESOURCES_H
+#define SANTA__COMMON__SYSTEMRESOURCES_H
+
+#import <Foundation/Foundation.h>
+#include <mach/mach_time.h>
+#include <sys/cdefs.h>
+#include <sys/proc_info.h>
+
+#include <optional>
+
+struct SantaTaskInfo {
+  uint64_t virtual_size;
+  uint64_t resident_size;
+  uint64_t total_user_nanos;
+  uint64_t total_system_nanos;
+};
+
+// Convert mach absolute time to nanoseconds
+uint64_t MachTimeToNanos(uint64_t mach_time);
+
+// Convert nanoseconds to mach absolute time
+uint64_t NanosToMachTime(uint64_t nanos);
+
+// Add some number of nanoseconds to a given mach time and return the new result
+uint64_t AddNanosecondsToMachTime(uint64_t ns, uint64_t machTime);
+
+// Get the result of proc_pidinfo with the PROC_PIDTASKINFO flavor
+std::optional<SantaTaskInfo> GetTaskInfo();
+
+#endif

Source/common/SystemResources.mm

@@ -0,0 +1,79 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#include "Source/common/SystemResources.h"
+
+#include <dispatch/dispatch.h>
+#include <libproc.h>
+#include <mach/kern_return.h>
+#include <unistd.h>
+#include <optional>
+
+#include "Source/common/SNTLogging.h"
+
+static mach_timebase_info_data_t GetTimebase() {
+  static dispatch_once_t once_token;
+  static mach_timebase_info_data_t timebase;
+
+  dispatch_once(&once_token, ^{
+    if (mach_timebase_info(&timebase) != KERN_SUCCESS) {
+      // This shouldn't fail. Assume transitory and exit the program.
+      // Hopefully fixes itself on restart...
+      LOGE(@"Failed to get timebase info. Exiting.");
+      exit(EXIT_FAILURE);
+    }
+  });
+
+  return timebase;
+}
+
+uint64_t MachTimeToNanos(uint64_t mach_time) {
+  static mach_timebase_info_data_t timebase = GetTimebase();
+
+  return mach_time * timebase.numer / timebase.denom;
+}
+
+uint64_t NanosToMachTime(uint64_t nanos) {
+  static mach_timebase_info_data_t timebase = GetTimebase();
+
+  return nanos * timebase.denom / timebase.numer;
+}
+
+uint64_t AddNanosecondsToMachTime(uint64_t ns, uint64_t machTime) {
+  // Convert machtime to nanoseconds
+  uint64_t nanoTime = MachTimeToNanos(machTime);
+
+  // Add the nanosecond offset
+  nanoTime += ns;
+
+  // Convert back to machTime
+  return NanosToMachTime(nanoTime);
+}
+
+std::optional<SantaTaskInfo> GetTaskInfo() {
+  struct proc_taskinfo pti;
+
+  if (proc_pidinfo(getpid(), PROC_PIDTASKINFO, 0, &pti, PROC_PIDTASKINFO_SIZE) <
+      PROC_PIDTASKINFO_SIZE) {
+    LOGW(@"Unable to get system resource information");
+    return std::nullopt;
+  }
+
+  return SantaTaskInfo{
+    .virtual_size = pti.pti_virtual_size,
+    .resident_size = pti.pti_resident_size,
+    .total_user_nanos = MachTimeToNanos(pti.pti_total_user),
+    .total_system_nanos = MachTimeToNanos(pti.pti_total_system),
+  };
+}

Source/common/TestUtils.h

@@ -0,0 +1,87 @@
+/// Copyright 2022 Google Inc. All rights reserved.
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///    http://www.apache.org/licenses/LICENSE-2.0
+///
+///    Unless required by applicable law or agreed to in writing, software
+///    distributed under the License is distributed on an "AS IS" BASIS,
+///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+///    See the License for the specific language governing permissions and
+///    limitations under the License.
+
+#ifndef SANTA__COMMON__TESTUTILS_H
+#define SANTA__COMMON__TESTUTILS_H
+
+#include <EndpointSecurity/EndpointSecurity.h>
+#import <XCTest/XCTest.h>
+#include <bsm/libbsm.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <sys/stat.h>
+
+#include <string>
+
+#define NOBODY_UID ((unsigned int)-2)
+#define NOGROUP_GID ((unsigned int)-1)
+
+// Bubble up googletest expectation failures to XCTest failures
+#define XCTBubbleMockVerifyAndClearExpectations(mock)              \
+  XCTAssertTrue(::testing::Mock::VerifyAndClearExpectations(mock), \
+                "Expected calls were not properly mocked")
+
+// Pretty print C string match errors
+#define XCTAssertCStringEqual(got, want)                                                      \
+  XCTAssertTrue(strcmp((got), (want)) == 0, @"\nMismatched strings.\n\t got: %s\n\twant: %s", \
+                (got), (want))
+
+// Pretty print C++ string match errors
+#define XCTAssertCppStringEqual(got, want) XCTAssertCStringEqual((got).c_str(), (want).c_str())
+
+#define XCTAssertCppStringBeginsWith(got, want)                                               \
+  XCTAssertTrue((got).rfind((want), 0) == 0, "\nPrefix not found.\n\t got: %s\n\twant: %s\n", \
+                (got).c_str(), (want).c_str())
+
+// Note: Delta between local formatter and the one run on Github. Disable for now.
+// clang-format off
+#define XCTAssertSemaTrue(s, sec, m) \
+  XCTAssertEqual(                    \
+    0, dispatch_semaphore_wait((s), dispatch_time(DISPATCH_TIME_NOW, (sec) * NSEC_PER_SEC)), m)
+// clang-format on
+
+// Helper to ensure at least `ms` milliseconds are slept, even if the sleep
+// function returns early due to interrupts.
+void SleepMS(long ms);
+
+// Helper to construct strings of a given length
+NSString *RepeatedString(NSString *str, NSUInteger len);
+
+//
+// Helpers to construct various ES structs
+//
+
+enum class ActionType {
+  Auth,
+  Notify,
+};
+
+audit_token_t MakeAuditToken(pid_t pid, pid_t pidver);
+
+/// Construct a `struct stat` buffer with each member having a unique value.
+/// @param offset An optional offset to be added to each member. useful when
+///   a test has multiple stats and you'd like for them each to have different
+///   values across the members.
+struct stat MakeStat(int offset = 0);
+
+es_string_token_t MakeESStringToken(const char *s);
+es_file_t MakeESFile(const char *path, struct stat sb = MakeStat());
+es_process_t MakeESProcess(es_file_t *file, audit_token_t tok = {}, audit_token_t parent_tok = {});
+es_message_t MakeESMessage(es_event_type_t et, es_process_t *proc,
+                           ActionType action_type = ActionType::Notify,
+                           uint64_t future_deadline_ms = 100000);
+
+uint32_t MaxSupportedESMessageVersionForCurrentOS();
+
+#endif

Source/common/TestUtils.mm

@@ -0,0 +1,132 @@
+/// Copyright 2022 Google Inc. All rights reserved.
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///    http://www.apache.org/licenses/LICENSE-2.0
+///
+///    Unless required by applicable law or agreed to in writing, software
+///    distributed under the License is distributed on an "AS IS" BASIS,
+///    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+///    See the License for the specific language governing permissions and
+///    limitations under the License.
+
+#include "Source/common/TestUtils.h"
+
+#include <EndpointSecurity/ESTypes.h>
+#include <dispatch/dispatch.h>
+#include <mach/mach_time.h>
+#include <time.h>
+#include <uuid/uuid.h>
+#include "Source/common/SystemResources.h"
+
+NSString *RepeatedString(NSString *str, NSUInteger len) {
+  return [@"" stringByPaddingToLength:len withString:str startingAtIndex:0];
+}
+
+audit_token_t MakeAuditToken(pid_t pid, pid_t pidver) {
+  return audit_token_t{
+    .val =
+      {
+        0,
+        NOBODY_UID,
+        NOGROUP_GID,
+        NOBODY_UID,
+        NOGROUP_GID,
+        (unsigned int)pid,
+        0,
+        (unsigned int)pidver,
+      },
+  };
+}
+
+struct stat MakeStat(int offset) {
+  return (struct stat){
+    .st_dev = 1 + offset,
+    .st_mode = (mode_t)(2 + offset),
+    .st_nlink = (nlink_t)(3 + offset),
+    .st_ino = (uint64_t)(4 + offset),
+    .st_uid = NOBODY_UID,
+    .st_gid = NOGROUP_GID,
+    .st_rdev = 5 + offset,
+    .st_atimespec = {.tv_sec = 100 + offset, .tv_nsec = 200 + offset},
+    .st_mtimespec = {.tv_sec = 101 + offset, .tv_nsec = 21 + offset},
+    .st_ctimespec = {.tv_sec = 102 + offset, .tv_nsec = 202 + offset},
+    .st_birthtimespec = {.tv_sec = 103 + offset, .tv_nsec = 203 + offset},
+    .st_size = 6 + offset,
+    .st_blocks = 7 + offset,
+    .st_blksize = 8 + offset,
+    .st_flags = (uint32_t)(9 + offset),
+    .st_gen = (uint32_t)(10 + offset),
+  };
+}
+
+es_string_token_t MakeESStringToken(const char *s) {
+  return es_string_token_t{
+    .length = strlen(s),
+    .data = s,
+  };
+}
+
+es_file_t MakeESFile(const char *path, struct stat sb) {
+  return es_file_t{
+    .path = MakeESStringToken(path),
+    .path_truncated = false,
+    .stat = sb,
+  };
+}
+
+es_process_t MakeESProcess(es_file_t *file, audit_token_t tok, audit_token_t parent_tok) {
+  return es_process_t{
+    .audit_token = tok,
+    .ppid = audit_token_to_pid(parent_tok),
+    .original_ppid = audit_token_to_pid(parent_tok),
+    .group_id = 111,
+    .session_id = 222,
+    .is_platform_binary = true,
+    .is_es_client = true,
+    .executable = file,
+    .parent_audit_token = parent_tok,
+  };
+}
+
+uint32_t MaxSupportedESMessageVersionForCurrentOS() {
+  // Note: ES message v3 was only in betas.
+  if (@available(macOS 13.0, *)) {
+    return 6;
+  } else if (@available(macOS 12.3, *)) {
+    return 5;
+  } else if (@available(macOS 11.0, *)) {
+    return 4;
+  } else if (@available(macOS 10.15.4, *)) {
+    return 2;
+  } else {
+    return 1;
+  }
+}
+
+es_message_t MakeESMessage(es_event_type_t et, es_process_t *proc, ActionType action_type,
+                           uint64_t future_deadline_ms) {
+  es_message_t es_msg = {
+    .deadline = AddNanosecondsToMachTime(future_deadline_ms * NSEC_PER_MSEC, mach_absolute_time()),
+    .process = proc,
+    .action_type =
+      (action_type == ActionType::Notify) ? ES_ACTION_TYPE_NOTIFY : ES_ACTION_TYPE_AUTH,
+    .event_type = et,
+  };
+
+  es_msg.version = MaxSupportedESMessageVersionForCurrentOS();
+
+  return es_msg;
+}
+
+void SleepMS(long ms) {
+  struct timespec ts {
+    .tv_sec = ms / 1000, .tv_nsec = (long)((ms % 1000) * NSEC_PER_MSEC),
+  };
+
+  while (nanosleep(&ts, &ts) != 0) {
+    XCTAssertEqual(errno, EINTR);
+  }
+}

Source/common/Unit.h

@@ -0,0 +1,24 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON__UNIT_H
+#define SANTA__COMMON__UNIT_H
+
+namespace santa::common {
+
+struct Unit {};
+
+}  // namespace santa::common
+
+#endif

Source/common/santa.proto

@@ -1,7 +1,4 @@
-//
-// !!! WARNING !!!
-// This proto is in beta format and subject to change.
-//
+// Important: This schema is currently in BETA
 
 syntax = "proto3";
 
@@ -10,135 +7,539 @@ import "google/protobuf/timestamp.proto";
 
 option objc_class_prefix = "SNTPB";
 
-package santa;
+package santa.pb.v1;
 
-message ProcessInfo {
+// User ID and associated username
+message UserInfo {
+  optional int32 uid = 1;
+  optional string name = 2;
+}
+
+// Group ID and associated group name
+message GroupInfo {
+  optional int32 gid = 1;
+  optional string name = 2;
+}
+
+// A process is uniquely identified on macOS by its pid and pidversion
+message ProcessID {
   optional int32 pid = 1;
   optional int32 pidversion = 2;
-  optional int32 ppid = 3;
-  optional int32 uid = 4;
-  optional string user = 5;
-  optional int32 gid = 6;
-  optional string group = 7;
 }
 
-message FileModification {
-  enum Action {
-    ACTION_UNKNOWN = 0;
-    ACTION_DELETE = 1;
-    ACTION_EXCHANGE = 2;
-    ACTION_LINK = 3;
-    ACTION_RENAME = 4;
-    ACTION_WRITE = 5;
+// Code signature information
+message CodeSignature {
+  // The code directory hash identifies a specific version of a program
+  optional bytes cdhash = 1;
+
+  // The signing id of the code signature
+  optional string signing_id = 2;
+
+  // The team id of the code signature
+  optional string team_id = 3;
+}
+
+// Stat information for a file
+// Mimics data from `stat(2)`
+message Stat {
+  optional int32 dev = 1;
+  optional uint32 mode = 2;
+  optional uint32 nlink = 3;
+  optional uint64 ino = 4;
+  optional UserInfo user = 5;
+  optional GroupInfo group = 6;
+  optional int32 rdev = 7;
+  optional google.protobuf.Timestamp access_time = 8;
+  optional google.protobuf.Timestamp modification_time = 9;
+  optional google.protobuf.Timestamp change_time = 10;
+  optional google.protobuf.Timestamp birth_time = 11;
+  optional int64 size = 12;
+  optional int64 blocks = 13;
+  optional int32 blksize = 14;
+  optional uint32 flags = 15;
+  optional int32 gen = 16;
+}
+
+// Hash value and metadata describing hash algorithm used
+message Hash {
+  enum HashAlgo {
+    HASH_ALGO_UNKNOWN = 0;
+    HASH_ALGO_SHA256 = 1;
   }
 
-  optional Action action = 1;
-  optional string path = 2;
-  optional string newpath = 3;
-  optional string process = 4;
-  optional string process_path = 5;
-  optional ProcessInfo process_info = 6;
-  optional string machine_id = 7;
+  optional HashAlgo type = 1;
+  optional string hash = 2;
 }
 
+// File information
+message FileInfo {
+  // File path
+  optional string path = 1;
+
+  // Whether or not the path is truncated
+  optional bool truncated = 2;
+
+  // Stat information
+  optional Stat stat = 3;
+
+  // Hash of file contents
+  optional Hash hash = 4;
+}
+
+// Light variant of `FileInfo` message to help minimize on-disk/on-wire sizes
+message FileInfoLight {
+  // File path
+  optional string path = 1;
+
+  // Whether or not the path is truncated
+  optional bool truncated = 2;
+}
+
+// File descriptor information
+message FileDescriptor {
+  // Enum types gathered from `<sys/proc_info.h>`
+  enum FDType {
+    FD_TYPE_UNKNOWN = 0;
+    FD_TYPE_ATALK = 1;
+    FD_TYPE_VNODE = 2;
+    FD_TYPE_SOCKET = 3;
+    FD_TYPE_PSHM = 4;
+    FD_TYPE_PSEM = 5;
+    FD_TYPE_KQUEUE = 6;
+    FD_TYPE_PIPE = 7;
+    FD_TYPE_FSEVENTS = 8;
+    FD_TYPE_NETPOLICY = 9;
+    FD_TYPE_CHANNEL = 10;
+    FD_TYPE_NEXUS = 11;
+  }
+
+  // File descriptor value
+  optional int32 fd = 1;
+
+  // Type of file object
+  optional FDType fd_type = 2;
+
+  // Unique id of the pipe for correlation with other file descriptors
+  // pointing to the same or other end of the same pipe
+  // Note: Only valid when `fd_type` is `FD_TYPE_PIPE`
+  optional uint64 pipe_id = 3;
+}
+
+// Process information
+message ProcessInfo {
+  // Process ID of the process
+  optional ProcessID id = 1;
+
+  // Process ID of the parent process
+  optional ProcessID parent_id = 2;
+
+  // Process ID of the process responsible for this one
+  optional ProcessID responsible_id = 3;
+
+  // Original parent ID, remains stable in the event a process is reparented
+  optional int32 original_parent_pid = 4;
+
+  // Process group id the process belongs to
+  optional int32 group_id = 5;
+
+  // Session id the process belongs to
+  optional int32 session_id = 6;
+
+  // Effective user/group info
+  optional UserInfo effective_user = 7;
+  optional GroupInfo effective_group = 8;
+
+  // Real user/group info
+  optional UserInfo real_user = 9;
+  optional GroupInfo real_group = 10;
+
+  // Whether or not the process was signed with Apple certificates
+  optional bool is_platform_binary = 11;
+
+  // Whether or not the process is an ES client
+  optional bool is_es_client = 12;
+
+  // Code signature information for the process
+  optional CodeSignature code_signature = 13;
+
+  // Codesigning flags for the process (from `<Kernel/kern/cs_blobs.h>`)
+  optional uint32 cs_flags = 14;
+
+  // File information for the executable backing this process
+  optional FileInfo executable = 15;
+
+  // File information for the associated TTY
+  optional FileInfoLight tty = 16;
+
+  // Time the process was started
+  optional google.protobuf.Timestamp start_time = 17;
+}
+
+// Light variant of ProcessInfo message to help minimize on-disk/on-wire sizes
+message ProcessInfoLight {
+  // Process ID of the process
+  optional ProcessID id = 1;
+
+  // Process ID of the parent process
+  optional ProcessID parent_id = 2;
+
+  // Original parent ID, remains stable in the event a process is reparented
+  optional int32 original_parent_pid = 3;
+
+  // Process group id the process belongs to
+  optional int32 group_id = 4;
+
+  // Session id the process belongs to
+  optional int32 session_id = 5;
+
+  // Effective user/group info
+  optional UserInfo effective_user = 6;
+  optional GroupInfo effective_group = 7;
+
+  // Real user/group info
+  optional UserInfo real_user = 8;
+  optional GroupInfo real_group = 9;
+
+  // File information for the executable backing this process
+  optional FileInfoLight executable = 10;
+}
+
+// Certificate information
+message CertificateInfo {
+  // Hash of the certificate data
+  optional Hash hash = 1;
+
+  // Common name used in the certificate
+  optional string common_name = 2;
+}
+
+// Information about a process execution event
 message Execution {
+  // The process that executed the new image (e.g. the process that called
+  // `execve(2)` or `posix_spawn(2)``)
+  optional ProcessInfoLight instigator = 1;
+
+  // Process info for the newly formed execution
+  optional ProcessInfo target = 2;
+
+  // Script file information
+  // Only valid when a script was executed directly and not as an argument to
+  // an interpreter (e.g.  `./foo.sh`, not `/bin/sh ./foo.sh`)
+  optional FileInfo script = 3;
+
+  // The current working directory of the `target` at exec time
+  optional FileInfo working_directory = 4;
+
+  // List of process arguments
+  repeated bytes args = 5;
+
+  // List of environment variables
+  repeated bytes envs = 6;
+
+  // List of file descriptors
+  repeated FileDescriptor fds = 7;
+
+  // Whether or not the list of `fds` is complete or contains partial info
+  optional bool fd_list_truncated = 8;
+
+  // Whether or not the target execution was allowed
   enum Decision {
     DECISION_UNKNOWN = 0;
     DECISION_ALLOW = 1;
     DECISION_DENY = 2;
   }
+  optional Decision decision = 9;
 
+  // The policy applied when determining the decision
   enum Reason {
     REASON_UNKNOWN = 0;
     REASON_BINARY = 1;
     REASON_CERT = 2;
     REASON_COMPILER = 3;
-    REASON_NOT_RUNNING = 4;
     REASON_PENDING_TRANSITIVE = 5;
     REASON_SCOPE = 6;
     REASON_TEAM_ID = 7;
     REASON_TRANSITIVE = 8;
+    REASON_LONG_PATH = 9;
+    REASON_NOT_RUNNING = 10;
+    REASON_SIGNING_ID = 11;
   }
+  optional Reason reason = 10;
 
+  // The mode Santa was in when the decision was applied
   enum Mode {
     MODE_UNKNOWN = 0;
     MODE_LOCKDOWN = 1;
     MODE_MONITOR = 2;
   }
+  optional Mode mode = 11;
 
-  optional Decision decision = 1;
-  optional Reason reason = 2;
-  optional string explain = 3;
-  optional string sha256 = 4;
-  optional string cert_sha256 = 5;
-  optional string cert_cn = 6;
-  optional string quarantine_url = 7;
-  optional ProcessInfo process_info = 8;
-  optional Mode mode = 9;
-  optional string path = 10;
-  optional string original_path = 11;
-  repeated string args = 12;
-  optional string machine_id = 13;
-  optional string team_id = 14;
+  // Certificate information for the target executable
+  optional CertificateInfo certificate_info = 12;
+
+  // Additional Santa metadata
+  optional string explain = 13;
+
+  // Information known to LaunchServices about the target executable file
+  optional string quarantine_url = 14;
+
+  // The original path on disk of the target executable
+  // Applies when executables are translocated
+  optional string original_path = 15;
 }
 
-message DiskAppeared {
-  optional string mount = 1;
-  optional string volume = 2;
-  optional string bsd_name = 3;
-  optional string fs = 4;
-  optional string model = 5;
-  optional string serial = 6;
-  optional string bus = 7;
-  optional string dmg_path = 8;
-  optional string appearance = 9;
+// Information about a fork event
+message Fork {
+  // The forking process
+  optional ProcessInfoLight instigator = 1;
+
+  // The newly formed child process
+  optional ProcessInfoLight child = 2;
 }
 
-message DiskDisappeared {
-  optional string mount = 1;
-  optional string volume = 2;
-  optional string bsd_name = 3;
+// Information about an exit event
+message Exit {
+  // The process that is exiting
+  optional ProcessInfoLight instigator = 1;
+
+  // Exit status code information
+  message Exited {
+    optional int32 exit_status = 1;
+  }
+
+  // Signal code
+  message Signaled {
+    optional int32 signal = 1;
+  }
+
+  // Information on how/why the process exited
+  oneof ExitType {
+    Exited exited = 2;
+    Signaled signaled = 3;
+    Signaled stopped = 4;
+  }
 }
 
+// Information about an open event
+message Open {
+  // The process that is opening the file
+  optional ProcessInfoLight instigator = 1;
+
+  // The file being opened
+  optional FileInfo target = 2;
+
+  // Bitmask of flags used to open the file
+  // Note: Represents the mask applied by the kernel, not the typical `open(2)`
+  // flags (e.g. FREAD, FWRITE instead of O_RDONLY, O_RDWR, etc...)
+  optional int32 flags = 3;
+}
+
+// Information about a close event
+message Close {
+  // The process closing the file
+  optional ProcessInfoLight instigator = 1;
+
+  // The file being closed
+  optional FileInfo target = 2;
+
+  // Whether or not the file was written to
+  optional bool modified = 3;
+}
+
+// Information about an exchagedata event
+// This event is not applicable to all filesystems (notably APFS)
+message Exchangedata {
+  // The process that is exchanging the data
+  optional ProcessInfoLight instigator = 1;
+
+  // File information for the two files in the exchangedata operation
+  optional FileInfo file1 = 2;
+  optional FileInfo file2 = 3;
+}
+
+// Information about a rename event
+message Rename {
+  // The process renaming the file
+  optional ProcessInfoLight instigator = 1;
+
+  // The source file being renamed
+  optional FileInfo source = 2;
+
+  // The target path when the rename is complete
+  optional string target = 3;
+
+  // Whether or not the target path previously existed
+  optional bool target_existed = 4;
+}
+
+// Information about an unlink event
+message Unlink {
+  // The process deleting the file
+  optional ProcessInfoLight instigator = 1;
+
+  // The file being deleted
+  optional FileInfo target = 2;
+}
+
+// Information about a processes codesigning invalidation event
+message CodesigningInvalidated {
+  optional ProcessInfoLight instigator = 1;
+}
+
+// Information about a link event
+message Link {
+  // The process performing the link
+  optional ProcessInfoLight instigator = 1;
+
+  // The source file being linked
+  optional FileInfo source = 2;
+
+  // The path of the new link
+  optional string target = 3;
+}
+
+// Information about when disks are added or removed
+message Disk {
+  // Whether the disk just appeared or disappeared from the system
+  enum Action {
+    ACTION_UNKNOWN = 0;
+    ACTION_APPEARED = 1;
+    ACTION_DISAPPEARED = 2;
+  }
+  optional Action action = 1;
+
+  // Volume path
+  optional string mount = 2;
+
+  // Volume name
+  optional string volume = 3;
+
+  // Media BSD name
+  optional string bsd_name = 4;
+
+  // Kind of volume
+  optional string fs = 5;
+
+  // Device vendor and model information
+  optional string model = 6;
+
+  // Serial number of the device
+  optional string serial = 7;
+
+  // Device protocol
+  optional string bus = 8;
+
+  // Path of the DMG
+  optional string dmg_path = 9;
+
+  // Time device appeared/disappeared
+  optional google.protobuf.Timestamp appearance = 10;
+
+  // Path mounted from
+  optional string mount_from = 11;
+}
+
+// Information emitted when Santa captures bundle information
 message Bundle {
   // This is the hash of the file within the bundle that triggered the event
-  optional string sha256 = 1;
+  optional Hash file_hash = 1;
+
   // This is the hash of the hashes of all executables in the bundle
-  optional string bundle_hash = 2;
+  optional Hash bundle_hash = 2;
+
+  // Name of the bundle
   optional string bundle_name = 3;
+
+  // Bundle identifier
   optional string bundle_id = 4;
+
+  // Bundle path
   optional string bundle_path = 5;
+
+  // Path of the file within the bundle that triggered the event
   optional string path = 6;
 }
 
-message Fork {
-  optional ProcessInfo process_info = 1;
-}
-
-message Exit {
-  optional ProcessInfo process_info = 1;
-}
-
+// Information for a transitive allowlist rule
 message Allowlist {
-  optional int32 pid = 1;
-  optional int32 pidversion = 2;
-  optional string path = 3;
-  optional string sha256 = 4;
+  // The process that caused the allowlist rule to be generated
+  optional ProcessInfoLight instigator = 1;
+
+  // The file the new allowlist rule applies to
+  optional FileInfo target = 2;
 }
 
-message SantaMessage {
-  google.protobuf.Timestamp event_time = 1;
+// Information about access to a watched path
+message FileAccess {
+  // The process that attempted to access the watched path
+  optional ProcessInfo instigator = 1;
 
-  oneof message {
-    FileModification file_modification = 2;
-    Execution execution = 3;
-    DiskAppeared disk_appeared = 4;
-    DiskDisappeared disk_disappeared = 5;
-    Bundle bundle = 6;
-    Fork fork = 7;
-    Exit exit = 8;
-    Allowlist allowlist = 9;
+  // The path that was accessed
+  optional FileInfoLight target = 2;
+
+  // The version of the policy when the decision was made
+  optional string policy_version = 3;
+
+  // The name of the specific policy that triggered this log
+  optional string policy_name = 4;
+
+  // The event type that attempted to access the watched path
+  enum AccessType {
+    ACCESS_TYPE_UNKNOWN = 0;
+    ACCESS_TYPE_OPEN = 1;
+    ACCESS_TYPE_RENAME = 2;
+    ACCESS_TYPE_UNLINK = 3;
+    ACCESS_TYPE_LINK = 4;
+    ACCESS_TYPE_CLONE = 5;
+    ACCESS_TYPE_EXCHANGEDATA = 6;
+    ACCESS_TYPE_COPYFILE = 7;
+    ACCESS_TYPE_CREATE = 8;
+    ACCESS_TYPE_TRUNCATE = 9;
   }
+  optional AccessType access_type = 5;
+
+  // Whether the operation was allowed or denied and why
+  enum PolicyDecision {
+    POLICY_DECISION_UNKNOWN = 0;
+    POLICY_DECISION_DENIED = 1;
+    POLICY_DECISION_DENIED_INVALID_SIGNATURE = 2;
+    POLICY_DECISION_ALLOWED_AUDIT_ONLY = 3;
+  }
+  optional PolicyDecision policy_decision = 6;
+}
+
+// A message encapsulating a single event
+message SantaMessage {
+  // Machine ID of the host emitting this log
+  // Only valid when EnableMachineIDDecoration configuration option is set
+  optional string machine_id = 1;
+
+  // Timestamp when the event occurred
+  optional google.protobuf.Timestamp event_time = 2;
+
+  // Timestamp when Santa finished processing the event
+  optional google.protobuf.Timestamp processed_time = 3;
+
+  // Event type being described by this message
+  oneof event {
+    Execution execution = 10;
+    Fork fork = 11;
+    Exit exit = 12;
+    Close close = 13;
+    Rename rename = 14;
+    Unlink unlink = 15;
+    Link link = 16;
+    Exchangedata exchangedata = 17;
+    Disk disk = 18;
+    Bundle bundle = 19;
+    Allowlist allowlist = 20;
+    FileAccess file_access = 21;
+    CodesigningInvalidated codesigning_invalidated = 22;
+  };
+}
+
+message SantaMessageBatch {
+  repeated SantaMessage messages = 1;
 }
 
 message LogBatch {

Source/common/santa_proto_include_wrapper.h

@@ -0,0 +1,20 @@
+/// Copyright 2022 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#ifndef SANTA__COMMON_SANTA_PROTO_INCLUDE_WRAPPER_H
+#define SANTA__COMMON_SANTA_PROTO_INCLUDE_WRAPPER_H
+
+#include "Source/common/santa.pb.h"
+
+#endif

Source/gui/BUILD

@@ -1,4 +1,5 @@
 load("@build_bazel_rules_apple//apple:macos.bzl", "macos_application")
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
 load("//:helper.bzl", "santa_unit_test")
 
 licenses(["notice"])
@@ -11,6 +12,36 @@ exports_files([
     "Resources/Images.xcassets/AppIcon.appiconset/santa-hat-icon-256.png",
 ])
 
+swift_library(
+    name = "SNTAboutWindowView",
+    srcs = ["SNTAboutWindowView.swift"],
+    generates_header = 1,
+    deps = ["//Source/common:SNTConfigurator"],
+)
+
+swift_library(
+    name = "SNTDeviceMessageWindowView",
+    srcs = [
+        "SNTDeviceMessageWindowView.swift",
+    ],
+    generates_header = 1,
+    deps = [
+        "//Source/common:SNTConfigurator",
+        "//Source/common:SNTDeviceEvent",
+    ],
+)
+
+swift_library(
+    name = "SNTFileAccessMessageWindowView",
+    srcs = [
+        "SNTFileAccessMessageWindowView.swift",
+    ],
+    generates_header = 1,
+    deps = [
+        "//Source/common:SNTFileAccessEvent",
+    ],
+)
+
 objc_library(
     name = "SantaGUI_lib",
     srcs = [
@@ -24,8 +55,8 @@ objc_library(
         "SNTBinaryMessageWindowController.m",
         "SNTDeviceMessageWindowController.h",
         "SNTDeviceMessageWindowController.m",
-        "SNTMessageWindow.h",
-        "SNTMessageWindow.m",
+        "SNTFileAccessMessageWindowController.h",
+        "SNTFileAccessMessageWindowController.m",
         "SNTMessageWindowController.h",
         "SNTMessageWindowController.m",
         "SNTNotificationManager.h",
@@ -36,8 +67,6 @@ objc_library(
         "SNTNotificationManager.h",
     ],
     data = [
-        "Resources/AboutWindow.xib",
-        "Resources/DeviceMessageWindow.xib",
         "Resources/MessageWindow.xib",
     ],
     sdk_frameworks = [
@@ -47,9 +76,14 @@ objc_library(
         "UserNotifications",
     ],
     deps = [
+        ":SNTAboutWindowView",
+        ":SNTDeviceMessageWindowView",
+        ":SNTFileAccessMessageWindowView",
+        "//Source/common:CertificateHelpers",
         "//Source/common:SNTBlockMessage_SantaGUI",
         "//Source/common:SNTConfigurator",
         "//Source/common:SNTDeviceEvent",
+        "//Source/common:SNTFileAccessEvent",
         "//Source/common:SNTLogging",
         "//Source/common:SNTStoredEvent",
         "//Source/common:SNTStrengthify",
@@ -85,7 +119,7 @@ macos_application(
         "//conditions:default": None,
     }),
     infoplists = ["Info.plist"],
-    minimum_os_version = "10.15",
+    minimum_os_version = "11.0",
     provisioning_profile = select({
         "//:adhoc_build": None,
         "//conditions:default": "//profiles:santa_dev",

Source/gui/Resources/AboutWindow.xib

@@ -1,95 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="20037" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
-    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="20037"/>
-        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
-    </dependencies>
-    <objects>
-        <customObject id="-2" userLabel="File's Owner" customClass="SNTAboutWindowController">
-            <connections>
-                <outlet property="aboutTextField" destination="uh6-q0-RzL" id="oGn-hV-wwc"/>
-                <outlet property="moreInfoButton" destination="SRu-Kf-vu5" id="Vj2-9Q-05d"/>
-                <outlet property="window" destination="F0z-JX-Cv5" id="gIp-Ho-8D9"/>
-            </connections>
-        </customObject>
-        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
-        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
-        <window title="Santa" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" visibleAtLaunch="NO" animationBehavior="default" id="F0z-JX-Cv5">
-            <windowStyleMask key="styleMask" titled="YES" closable="YES"/>
-            <rect key="contentRect" x="196" y="240" width="480" height="200"/>
-            <rect key="screenRect" x="0.0" y="0.0" width="1728" height="1079"/>
-            <view key="contentView" id="se5-gp-TjO">
-                <rect key="frame" x="0.0" y="0.0" width="480" height="200"/>
-                <autoresizingMask key="autoresizingMask"/>
-                <subviews>
-                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="BnL-ZS-kXw">
-                        <rect key="frame" x="199" y="140" width="83" height="40"/>
-                        <constraints>
-                            <constraint firstAttribute="height" constant="40" id="UK2-2L-lPx"/>
-                            <constraint firstAttribute="width" constant="79" id="lDf-D7-qlY"/>
-                        </constraints>
-                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Santa" id="VVj-gU-bzy">
-                            <font key="font" size="34" name="HelveticaNeue-UltraLight"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                    </textField>
-                    <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="uh6-q0-RzL">
-                        <rect key="frame" x="18" y="65" width="444" height="60"/>
-                        <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                        <textFieldCell key="cell" sendsActionOnEndEditing="YES" alignment="center" id="CcT-ul-1eA">
-                            <font key="font" metaFont="system"/>
-                            <string key="title">Santa is an application control system for macOS.
-
-There are no user-configurable settings.</string>
-                            <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                    </textField>
-                    <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="SRu-Kf-vu5">
-                        <rect key="frame" x="129" y="21" width="113" height="32"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="99" id="JHv-2J-QSe"/>
-                        </constraints>
-                        <buttonCell key="cell" type="push" title="More Info..." bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="6fe-ju-aET">
-                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                            <font key="font" metaFont="system"/>
-                        </buttonCell>
-                        <connections>
-                            <action selector="openMoreInfoURL:" target="-2" id="dps-TN-rkS"/>
-                        </connections>
-                    </button>
-                    <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Udo-BY-n7e">
-                        <rect key="frame" x="239" y="21" width="113" height="32"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="99" id="2Xc-ax-2bV"/>
-                        </constraints>
-                        <buttonCell key="cell" type="push" title="Dismiss" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="uSw-o1-lWW">
-                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                            <font key="font" metaFont="system"/>
-                            <string key="keyEquivalent" base64-UTF8="YES">
-DQ
-</string>
-                        </buttonCell>
-                        <connections>
-                            <action selector="orderOut:" target="-1" id="6oW-zI-zn5"/>
-                        </connections>
-                    </button>
-                </subviews>
-                <constraints>
-                    <constraint firstItem="Udo-BY-n7e" firstAttribute="leading" secondItem="se5-gp-TjO" secondAttribute="leading" priority="900" constant="191" id="1T4-DB-Dz8"/>
-                    <constraint firstItem="SRu-Kf-vu5" firstAttribute="leading" secondItem="se5-gp-TjO" secondAttribute="leading" constant="136" id="Ake-nU-qhW"/>
-                    <constraint firstItem="BnL-ZS-kXw" firstAttribute="top" secondItem="se5-gp-TjO" secondAttribute="top" constant="20" symbolic="YES" id="Fj1-SG-mzF"/>
-                    <constraint firstAttribute="bottom" secondItem="Udo-BY-n7e" secondAttribute="bottom" constant="28" id="bpF-hC-haN"/>
-                    <constraint firstAttribute="bottom" secondItem="SRu-Kf-vu5" secondAttribute="bottom" constant="28" id="fCB-02-SEt"/>
-                    <constraint firstItem="BnL-ZS-kXw" firstAttribute="centerX" secondItem="se5-gp-TjO" secondAttribute="centerX" id="kez-S0-6Gg"/>
-                    <constraint firstItem="Udo-BY-n7e" firstAttribute="leading" secondItem="SRu-Kf-vu5" secondAttribute="trailing" constant="11" id="sYO-yY-w9w"/>
-                </constraints>
-            </view>
-            <connections>
-                <outlet property="delegate" destination="-2" id="0bl-1N-AYu"/>
-            </connections>
-            <point key="canvasLocation" x="323" y="317"/>
-        </window>
-    </objects>
-</document>

Source/gui/Resources/DeviceMessageWindow.xib

@@ -1,193 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="20037" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
-    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="20037"/>
-        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
-    </dependencies>
-    <objects>
-        <customObject id="-2" userLabel="File's Owner" customClass="SNTDeviceMessageWindowController">
-            <connections>
-                <outlet property="window" destination="9Bq-yh-54f" id="Uhs-WF-TV9"/>
-            </connections>
-        </customObject>
-        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
-        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
-        <window title="Santa Blocked Execution" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" visibleAtLaunch="NO" animationBehavior="none" id="9Bq-yh-54f" customClass="SNTMessageWindow">
-            <windowStyleMask key="styleMask" utility="YES"/>
-            <rect key="contentRect" x="167" y="107" width="515" height="318"/>
-            <rect key="screenRect" x="0.0" y="0.0" width="1728" height="1079"/>
-            <view key="contentView" id="Iwq-Lx-rLv">
-                <rect key="frame" x="0.0" y="0.0" width="515" height="318"/>
-                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                <userGuides>
-                    <userLayoutGuide location="344" affinity="minX"/>
-                </userGuides>
-                <subviews>
-                    <button focusRingType="none" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="kiB-jZ-69S">
-                        <rect key="frame" x="16" y="290" width="37" height="32"/>
-                        <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                        <buttonCell key="cell" type="push" title="Hidden Button" alternateTitle="This button exists so neither of the other two buttons is pre-selected when the dialog opens." bezelStyle="rounded" alignment="center" borderStyle="border" focusRingType="none" transparent="YES" imageScaling="proportionallyDown" inset="2" id="XGa-Sl-F4t">
-                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                            <font key="font" metaFont="system"/>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="boolean" keyPath="accessibilityElement" value="NO"/>
-                            </userDefinedRuntimeAttributes>
-                        </buttonCell>
-                    </button>
-                    <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" setsMaxLayoutWidthAtFirstLayout="YES" textCompletion="NO" translatesAutoresizingMaskIntoConstraints="NO" id="cD5-Su-lXR" customClass="SNTAccessibleTextField">
-                        <rect key="frame" x="31" y="210" width="454" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="450" id="XgJ-EV-tBa"/>
-                        </constraints>
-                        <textFieldCell key="cell" selectable="YES" refusesFirstResponder="YES" allowsUndo="NO" sendsActionOnEndEditing="YES" alignment="center" title="A message to the user goes here..." allowsEditingTextAttributes="YES" id="5tH-bG-UJA">
-                            <font key="font" metaFont="system"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                        <connections>
-                            <binding destination="-2" name="value" keyPath="self.attributedCustomMessage" id="376-sj-4Q1"/>
-                        </connections>
-                    </textField>
-                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="d9e-Wv-Y5H" userLabel="Label: Path">
-                        <rect key="frame" x="8" y="139" width="142" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="138" id="Kqd-nX-7df"/>
-                        </constraints>
-                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Device Name" id="KgY-X1-ESG">
-                            <font key="font" metaFont="systemBold"/>
-                            <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="boolean" keyPath="accessibilityElement" value="NO"/>
-                            </userDefinedRuntimeAttributes>
-                        </textFieldCell>
-                    </textField>
-                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="YNz-ka-cBi" userLabel="Label: Path">
-                        <rect key="frame" x="8" y="115" width="142" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="138" id="3wU-P0-gAC"/>
-                        </constraints>
-                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Device BSD Path" id="adC-be-Beh">
-                            <font key="font" metaFont="systemBold"/>
-                            <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="boolean" keyPath="accessibilityElement" value="NO"/>
-                            </userDefinedRuntimeAttributes>
-                        </textFieldCell>
-                    </textField>
-                    <textField toolTip="Device Name" verticalHuggingPriority="900" horizontalCompressionResistancePriority="250" verticalCompressionResistancePriority="1000" ambiguous="YES" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="pc8-G9-4pJ" customClass="SNTAccessibleTextField">
-                        <rect key="frame" x="187" y="139" width="315" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="311" id="xVR-j3-dLw"/>
-                        </constraints>
-                        <textFieldCell key="cell" selectable="YES" sendsActionOnEndEditing="YES" alignment="left" title="Device Name" id="E7T-9h-ofr">
-                            <font key="font" metaFont="system"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                        <connections>
-                            <binding destination="-2" name="value" keyPath="self.event.mntonname" id="bOu-gv-1Vh"/>
-                        </connections>
-                    </textField>
-                    <textField toolTip="Device BSD Path" verticalHuggingPriority="900" horizontalCompressionResistancePriority="250" verticalCompressionResistancePriority="1000" ambiguous="YES" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="bDE-Tl-UHg" customClass="SNTAccessibleTextField">
-                        <rect key="frame" x="187" y="115" width="315" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="311" id="p1W-f9-KBX"/>
-                        </constraints>
-                        <textFieldCell key="cell" selectable="YES" sendsActionOnEndEditing="YES" alignment="left" title="Device BSD Path" id="H1b-Ui-CYo">
-                            <font key="font" metaFont="system"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                        <connections>
-                            <binding destination="-2" name="value" keyPath="self.event.mntfromname" id="Sry-KY-HDb"/>
-                        </connections>
-                    </textField>
-                    <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="t8c-Fx-e5h">
-                        <rect key="frame" x="217" y="248" width="82" height="40"/>
-                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" refusesFirstResponder="YES" sendsActionOnEndEditing="YES" title="Santa" id="7YA-iB-Zma">
-                            <font key="font" metaFont="systemUltraLight" size="34"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="boolean" keyPath="accessibilityElement" value="NO"/>
-                            </userDefinedRuntimeAttributes>
-                        </textFieldCell>
-                    </textField>
-                    <textField verticalHuggingPriority="750" ambiguous="YES" translatesAutoresizingMaskIntoConstraints="NO" id="i8e-8n-tZS" userLabel="Label: Path">
-                        <rect key="frame" x="8" y="91" width="142" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="138" id="a3r-ng-zxJ"/>
-                        </constraints>
-                        <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="right" title="Remount Mode" id="4D0-8L-ihK">
-                            <font key="font" metaFont="systemBold"/>
-                            <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
-                            <userDefinedRuntimeAttributes>
-                                <userDefinedRuntimeAttribute type="boolean" keyPath="accessibilityElement" value="NO"/>
-                            </userDefinedRuntimeAttributes>
-                        </textFieldCell>
-                    </textField>
-                    <textField toolTip="Device BSD Path" verticalHuggingPriority="750" ambiguous="YES" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="kmz-be-oWf" customClass="SNTAccessibleTextField">
-                        <rect key="frame" x="187" y="91" width="315" height="16"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="311" id="cbM-i5-bJ9"/>
-                        </constraints>
-                        <textFieldCell key="cell" selectable="YES" sendsActionOnEndEditing="YES" alignment="left" title="Remount Mode" id="qI0-Na-kxN">
-                            <font key="font" metaFont="system"/>
-                            <color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
-                            <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                        </textFieldCell>
-                        <connections>
-                            <binding destination="-2" name="value" keyPath="self.event.readableRemountArgs" id="bOu-gv-1Vl"/>
-                        </connections>
-                    </textField>
-                    <button verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="BbV-3h-mmL" userLabel="Dismiss Button">
-                        <rect key="frame" x="202" y="18" width="112" height="25"/>
-                        <constraints>
-                            <constraint firstAttribute="width" constant="110" id="6Uh-Bd-N64"/>
-                            <constraint firstAttribute="height" constant="22" id="GH6-nw-6rD"/>
-                        </constraints>
-                        <buttonCell key="cell" type="roundTextured" title="Ok" bezelStyle="texturedRounded" alignment="center" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="XR6-Xa-gP4">
-                            <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
-                            <font key="font" metaFont="system"/>
-                            <string key="keyEquivalent" base64-UTF8="YES">
-DQ
-</string>
-                            <modifierMask key="keyEquivalentModifierMask" shift="YES"/>
-                        </buttonCell>
-                        <accessibility description="Dismiss Dialog"/>
-                        <connections>
-                            <action selector="closeWindow:" target="-2" id="qQq-gh-8lw"/>
-                        </connections>
-                    </button>
-                </subviews>
-                <constraints>
-                    <constraint firstItem="BbV-3h-mmL" firstAttribute="leading" secondItem="Iwq-Lx-rLv" secondAttribute="leading" priority="500" constant="193" id="2uo-Cm-Tfp"/>
-                    <constraint firstItem="kmz-be-oWf" firstAttribute="height" secondItem="i8e-8n-tZS" secondAttribute="height" id="6Ow-Sl-6Wc"/>
-                    <constraint firstItem="d9e-Wv-Y5H" firstAttribute="leading" secondItem="Iwq-Lx-rLv" secondAttribute="leading" constant="10" id="FPe-Rd-G4n"/>
-                    <constraint firstItem="t8c-Fx-e5h" firstAttribute="top" secondItem="Iwq-Lx-rLv" secondAttribute="top" constant="30" id="FuB-GX-0jg"/>
-                    <constraint firstItem="YNz-ka-cBi" firstAttribute="leading" secondItem="Iwq-Lx-rLv" secondAttribute="leading" constant="10" id="KmX-kX-VCN"/>
-                    <constraint firstItem="pc8-G9-4pJ" firstAttribute="top" secondItem="cD5-Su-lXR" secondAttribute="bottom" priority="950" constant="55" id="Nsl-zf-poH"/>
-                    <constraint firstItem="YNz-ka-cBi" firstAttribute="centerY" secondItem="bDE-Tl-UHg" secondAttribute="centerY" id="ObQ-RA-S5V"/>
-                    <constraint firstItem="d9e-Wv-Y5H" firstAttribute="centerY" secondItem="pc8-G9-4pJ" secondAttribute="centerY" id="SLv-F7-w5k"/>
-                    <constraint firstAttribute="centerX" secondItem="cD5-Su-lXR" secondAttribute="centerX" id="V0a-Py-iEc"/>
-                    <constraint firstItem="cD5-Su-lXR" firstAttribute="top" secondItem="t8c-Fx-e5h" secondAttribute="bottom" constant="22" id="dYg-zP-wh2"/>
-                    <constraint firstAttribute="centerX" secondItem="t8c-Fx-e5h" secondAttribute="centerX" id="h3d-Kc-q88"/>
-                    <constraint firstItem="kmz-be-oWf" firstAttribute="centerY" secondItem="i8e-8n-tZS" secondAttribute="centerY" id="ilC-5x-LNe"/>
-                    <constraint firstItem="bDE-Tl-UHg" firstAttribute="top" secondItem="pc8-G9-4pJ" secondAttribute="bottom" constant="8" id="pis-of-f93"/>
-                    <constraint firstItem="i8e-8n-tZS" firstAttribute="centerY" secondItem="YNz-ka-cBi" secondAttribute="centerY" constant="24" id="uZs-XT-PuZ"/>
-                    <constraint firstAttribute="bottom" secondItem="BbV-3h-mmL" secondAttribute="bottom" constant="35" id="ukF-FH-DE8"/>
-                    <constraint firstItem="YNz-ka-cBi" firstAttribute="firstBaseline" secondItem="d9e-Wv-Y5H" secondAttribute="baseline" constant="24" id="xZu-AY-wX5"/>
-                    <constraint firstItem="i8e-8n-tZS" firstAttribute="top" secondItem="YNz-ka-cBi" secondAttribute="bottom" constant="8" symbolic="YES" id="ylw-3s-9JW"/>
-                </constraints>
-            </view>
-            <connections>
-                <outlet property="initialFirstResponder" destination="kiB-jZ-69S" id="I96-dS-lq5"/>
-            </connections>
-            <point key="canvasLocation" x="261.5" y="246"/>
-        </window>
-        <userDefaultsController representsSharedInstance="YES" id="iXx-cu-WYe"/>
-    </objects>
-</document>

Source/gui/SNTAboutWindowController.h

@@ -14,11 +14,5 @@
 
 #import <Cocoa/Cocoa.h>
 
-@interface SNTAboutWindowController : NSWindowController
-
-@property IBOutlet NSTextField *aboutTextField;
-@property IBOutlet NSButton *moreInfoButton;
-
-- (IBAction)openMoreInfoURL:(id)sender;
-
+@interface SNTAboutWindowController : NSWindowController <NSWindowDelegate>
 @end

Source/gui/SNTAboutWindowController.m

@@ -13,30 +13,35 @@
 ///    limitations under the License.
 
 #import "Source/gui/SNTAboutWindowController.h"
+#import "Source/gui/SNTAboutWindowView-Swift.h"
 
 #import "Source/common/SNTConfigurator.h"
 
 @implementation SNTAboutWindowController
 
-- (instancetype)init {
-  return [super initWithWindowNibName:@"AboutWindow"];
+- (void)showWindow:(id)sender {
+  [super showWindow:sender];
+
+  if (self.window) [self.window orderOut:sender];
+
+  self.window =
+    [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 0, 0)
+                                styleMask:NSWindowStyleMaskClosable | NSWindowStyleMaskTitled
+                                  backing:NSBackingStoreBuffered
+                                    defer:NO];
+  self.window.contentViewController = [SNTAboutWindowViewFactory createWithWindow:self.window];
+  self.window.title = @"Santa";
+  self.window.delegate = self;
+  [self.window makeKeyAndOrderFront:nil];
+  [self.window center];
+
+  // Add app to Cmd+Tab and Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyRegular;
 }
 
-- (void)loadWindow {
-  [super loadWindow];
-  SNTConfigurator *config = [SNTConfigurator configurator];
-  NSString *aboutText = [config aboutText];
-  if (aboutText) {
-    [self.aboutTextField setStringValue:aboutText];
-  }
-  if (![config moreInfoURL]) {
-    [self.moreInfoButton removeFromSuperview];
-  }
-}
-
-- (IBAction)openMoreInfoURL:(id)sender {
-  [[NSWorkspace sharedWorkspace] openURL:[[SNTConfigurator configurator] moreInfoURL]];
-  [self close];
+- (void)windowWillClose:(NSNotification *)notification {
+  // Remove app from Cmd+Tab and Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyAccessory;
 }
 
 @end

Source/gui/SNTAboutWindowView.swift

@@ -0,0 +1,63 @@
+import SwiftUI
+
+import santa_common_SNTConfigurator
+
+@objc public class SNTAboutWindowViewFactory : NSObject {
+  @objc public static func createWith(window: NSWindow) -> NSViewController {
+    return NSHostingController(rootView:SNTAboutWindowView(w:window).frame(width:400, height:200))
+  }
+}
+
+struct SNTAboutWindowView: View {
+  let w: NSWindow?
+  let c = SNTConfigurator()
+
+  var body: some View {
+    VStack(spacing:20.0) {
+      Text("Santa").font(Font.custom("HelveticaNeue-UltraLight", size: 34.0))
+
+      if let t = c.aboutText {
+        Text(t).multilineTextAlignment(.center)
+      } else {
+        Text("""
+        Santa is an application control system for macOS.
+
+        There are no user-configurable settings.
+        """).multilineTextAlignment(.center)
+      }
+
+      HStack {
+        if c.moreInfoURL?.absoluteString.isEmpty == false {
+          Button(action: moreInfoButton) {
+            Text("More Info...").frame(width: 90.0)
+          }
+        }
+
+        Button(action: dismissButton) {
+          Text("Dismiss").frame(width: 90.0)
+        }
+        .keyboardShortcut(.defaultAction)
+
+      }.padding(10.0)
+    }
+  }
+
+  func dismissButton() {
+    w?.close()
+  }
+
+  func moreInfoButton() {
+    if let u = c.moreInfoURL {
+      NSWorkspace.shared.open(u)
+    }
+    w?.close()
+  }
+}
+
+// Enable previews in Xcode.
+struct SNTAboutWindow_Previews: PreviewProvider {
+  static var previews: some View {
+    SNTAboutWindowView(w: nil)
+  }
+}
+

Source/gui/SNTAppDelegate.m

@@ -58,7 +58,9 @@
 }
 
 - (BOOL)applicationShouldHandleReopen:(NSApplication *)sender hasVisibleWindows:(BOOL)flag {
-  self.aboutWindowController = [[SNTAboutWindowController alloc] init];
+  if (!self.aboutWindowController) {
+    self.aboutWindowController = [[SNTAboutWindowController alloc] init];
+  }
   [self.aboutWindowController showWindow:self];
   return NO;
 }

Source/gui/SNTBinaryMessageWindowController.h

@@ -23,7 +23,9 @@
 ///
 @interface SNTBinaryMessageWindowController : SNTMessageWindowController
 
-- (instancetype)initWithEvent:(SNTStoredEvent *)event andMessage:(NSString *)message;
+- (instancetype)initWithEvent:(SNTStoredEvent *)event
+                    customMsg:(NSString *)message
+                    customURL:(NSString *)url;
 
 - (IBAction)showCertInfo:(id)sender;
 - (void)updateBlockNotification:(SNTStoredEvent *)event withBundleHash:(NSString *)bundleHash;

Source/gui/SNTBinaryMessageWindowController.m

@@ -17,15 +17,18 @@
 #import <MOLCertificate/MOLCertificate.h>
 #import <SecurityInterface/SFCertificatePanel.h>
 
+#import "Source/common/CertificateHelpers.h"
 #import "Source/common/SNTBlockMessage.h"
 #import "Source/common/SNTConfigurator.h"
 #import "Source/common/SNTStoredEvent.h"
-#import "Source/gui/SNTMessageWindow.h"
 
 @interface SNTBinaryMessageWindowController ()
 ///  The custom message to display for this event
 @property(copy) NSString *customMessage;
 
+///  The custom URL to use for this event
+@property(copy) NSString *customURL;
+
 ///  A 'friendly' string representing the certificate information
 @property(readonly, nonatomic) NSString *publisherInfo;
 
@@ -40,11 +43,14 @@
 
 @implementation SNTBinaryMessageWindowController
 
-- (instancetype)initWithEvent:(SNTStoredEvent *)event andMessage:(NSString *)message {
+- (instancetype)initWithEvent:(SNTStoredEvent *)event
+                    customMsg:(NSString *)message
+                    customURL:(NSString *)url {
   self = [super initWithWindowNibName:@"MessageWindow"];
   if (self) {
     _event = event;
     _customMessage = message;
+    _customURL = url;
     _progress = [NSProgress discreteProgressWithTotalUnitCount:1];
     [_progress addObserver:self
                 forKeyPath:@"fractionCompleted"
@@ -75,9 +81,14 @@
 
 - (void)loadWindow {
   [super loadWindow];
-  if (![[SNTConfigurator configurator] eventDetailURL]) {
+  NSURL *url = [SNTBlockMessage eventDetailURLForEvent:self.event customURL:self.customURL];
+
+  if (!url) {
     [self.openEventButton removeFromSuperview];
-  } else {
+  } else if (self.customURL.length == 0) {
+    // Set the button text only if a per-rule custom URL is not used. If a
+    // custom URL is used, it is assumed that the `EventDetailText` config value
+    // does not apply and the default text will be used.
     NSString *eventDetailText = [[SNTConfigurator configurator] eventDetailText];
     if (eventDetailText) {
       [self.openEventButton setTitle:eventDetailText];
@@ -107,21 +118,17 @@
 
 - (IBAction)showCertInfo:(id)sender {
   // SFCertificatePanel expects an NSArray of SecCertificateRef's
-  NSMutableArray *certArray = [NSMutableArray arrayWithCapacity:[self.event.signingChain count]];
-  for (MOLCertificate *cert in self.event.signingChain) {
-    [certArray addObject:(id)cert.certRef];
-  }
-
   [[[SFCertificatePanel alloc] init] beginSheetForWindow:self.window
                                            modalDelegate:nil
                                           didEndSelector:nil
                                              contextInfo:nil
-                                            certificates:certArray
+                                            certificates:CertificateChain(self.event.signingChain)
                                                showGroup:YES];
 }
 
 - (IBAction)openEventDetails:(id)sender {
-  NSURL *url = [SNTBlockMessage eventDetailURLForEvent:self.event];
+  NSURL *url = [SNTBlockMessage eventDetailURLForEvent:self.event customURL:self.customURL];
+
   [self closeWindow:sender];
   [[NSWorkspace sharedWorkspace] openURL:url];
 }
@@ -137,19 +144,7 @@
 }
 
 - (NSString *)publisherInfo {
-  MOLCertificate *leafCert = [self.event.signingChain firstObject];
-
-  if ([leafCert.commonName isEqualToString:@"Apple Mac OS Application Signing"]) {
-    return [NSString stringWithFormat:@"App Store (Team ID: %@)", self.event.teamID];
-  } else if (leafCert.commonName && leafCert.orgName) {
-    return [NSString stringWithFormat:@"%@ - %@", leafCert.orgName, leafCert.commonName];
-  } else if (leafCert.commonName) {
-    return leafCert.commonName;
-  } else if (leafCert.orgName) {
-    return leafCert.orgName;
-  } else {
-    return nil;
-  }
+  return Publisher(self.event.signingChain, self.event.teamID);
 }
 
 - (NSAttributedString *)attributedCustomMessage {

Source/gui/SNTDeviceMessageWindowController.h

@@ -23,10 +23,7 @@ NS_ASSUME_NONNULL_BEGIN
 ///
 ///  Controller for a single message window.
 ///
-@interface SNTDeviceMessageWindowController : SNTMessageWindowController
-
-@property(weak) IBOutlet NSTextField *remountArgsLabel;
-@property(weak) IBOutlet NSTextField *remountArgsTitle;
+@interface SNTDeviceMessageWindowController : SNTMessageWindowController <NSWindowDelegate>
 
 // The device event this window is for.
 @property(readonly) SNTDeviceEvent *event;

Source/gui/SNTDeviceMessageWindowController.m

@@ -13,11 +13,11 @@
 ///    limitations under the License.
 
 #import "Source/gui/SNTDeviceMessageWindowController.h"
+#import "Source/gui/SNTDeviceMessageWindowView-Swift.h"
 
 #import "Source/common/SNTBlockMessage.h"
 #import "Source/common/SNTConfigurator.h"
 #import "Source/common/SNTDeviceEvent.h"
-#import "Source/gui/SNTMessageWindow.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -28,7 +28,7 @@ NS_ASSUME_NONNULL_BEGIN
 @implementation SNTDeviceMessageWindowController
 
 - (instancetype)initWithEvent:(SNTDeviceEvent *)event message:(nullable NSString *)message {
-  self = [super initWithWindowNibName:@"DeviceMessageWindow"];
+  self = [super init];
   if (self) {
     _event = event;
     _customMessage = message;
@@ -36,12 +36,30 @@ NS_ASSUME_NONNULL_BEGIN
   return self;
 }
 
-- (void)loadWindow {
-  [super loadWindow];
-  if (!self.event.remountArgs || [self.event.remountArgs count] <= 0) {
-    [self.remountArgsLabel removeFromSuperview];
-    [self.remountArgsTitle removeFromSuperview];
-  }
+- (void)showWindow:(id)sender {
+  if (self.window) [self.window orderOut:sender];
+
+  self.window =
+    [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 0, 0)
+                                styleMask:NSWindowStyleMaskClosable | NSWindowStyleMaskTitled
+                                  backing:NSBackingStoreBuffered
+                                    defer:NO];
+  self.window.contentViewController =
+    [SNTDeviceMessageWindowViewFactory createWithWindow:self.window
+                                                  event:self.event
+                                              customMsg:self.attributedCustomMessage];
+  self.window.delegate = self;
+
+  // Add app to Cmd+Tab and Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyRegular;
+
+  [super showWindow:sender];
+}
+
+- (void)windowWillClose:(NSNotification *)notification {
+  // Remove app from Cmd+Tab and Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyAccessory;
+  [super windowWillClose:notification];
 }
 
 - (NSAttributedString *)attributedCustomMessage {

Source/gui/SNTDeviceMessageWindowView.swift

@@ -0,0 +1,90 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+import SwiftUI
+
+import santa_common_SNTConfigurator
+import santa_common_SNTDeviceEvent
+
+@objc public class SNTDeviceMessageWindowViewFactory : NSObject {
+  @objc public static func createWith(window: NSWindow, event: SNTDeviceEvent, customMsg: NSAttributedString?) -> NSViewController {
+    return NSHostingController(rootView:SNTDeviceMessageWindowView(window:window, event:event, customMsg:customMsg).frame(width:450, height:300))
+  }
+}
+
+struct SNTDeviceMessageWindowView: View {
+  let window: NSWindow?
+  let event: SNTDeviceEvent?
+  let customMsg: NSAttributedString?
+
+  let c = SNTConfigurator()
+
+
+  var body: some View {
+    VStack(spacing:20.0) {
+      Text("Santa").font(Font.custom("HelveticaNeue-UltraLight", size: 34.0))
+
+      if let t = customMsg {
+        if #available(macOS 12.0, *) {
+          let a = AttributedString(t)
+          Text(a).multilineTextAlignment(.center).padding(15.0)
+        } else {
+          Text(t.description).multilineTextAlignment(.center).padding(15.0)
+        }
+      } else {
+        Text("Mounting devices is blocked")
+      }
+
+      HStack(spacing:5.0) {
+        VStack(alignment: .trailing, spacing: 8.0) {
+          Text("Device Name").bold()
+          Text("Device BSD Path").bold()
+
+          if event!.remountArgs?.count ?? 0 > 0 {
+            Text("Remount Mode").bold()
+          }
+        }
+        Spacer().frame(width: 10.0)
+        VStack(alignment: .leading, spacing: 8.0) {
+          Text(event!.mntonname)
+          Text(event!.mntfromname)
+
+          if event!.remountArgs?.count ?? 0 > 0 {
+            Text(event!.readableRemountArgs())
+          }
+        }
+      }
+
+      HStack {
+        Button(action: dismissButton) {
+          Text("OK").frame(width: 90.0)
+        }
+        .keyboardShortcut(.defaultAction)
+
+      }.padding(10.0)
+    }
+  }
+
+  func dismissButton() {
+    window?.close()
+  }
+}
+
+// Enable previews in Xcode.
+struct SNTDeviceMessageWindowView_Previews: PreviewProvider {
+  static var previews: some View {
+    SNTDeviceMessageWindowView(window: nil, event: nil, customMsg: nil)
+  }
+}
+

Source/gui/SNTFileAccessMessageWindowController.h

@@ -0,0 +1,38 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import <Cocoa/Cocoa.h>
+
+#import "Source/gui/SNTMessageWindowController.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class SNTFileAccessEvent;
+
+///
+///  Controller for a single message window.
+///
+API_AVAILABLE(macos(13.0))
+@interface SNTFileAccessMessageWindowController : SNTMessageWindowController <NSWindowDelegate>
+
+- (instancetype)initWithEvent:(SNTFileAccessEvent *)event
+                customMessage:(nullable NSString *)message
+                    customURL:(nullable NSString *)url
+                   customText:(nullable NSString *)text;
+
+@property(readonly) SNTFileAccessEvent *event;
+
+@end
+
+NS_ASSUME_NONNULL_END

Source/gui/SNTFileAccessMessageWindowController.m

@@ -0,0 +1,95 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+#import "Source/gui/SNTFileAccessMessageWindowController.h"
+#import "Source/gui/SNTFileAccessMessageWindowView-Swift.h"
+
+#import "Source/common/SNTBlockMessage.h"
+#import "Source/common/SNTFileAccessEvent.h"
+#import "Source/common/SNTLogging.h"
+
+@interface SNTFileAccessMessageWindowController ()
+@property NSString *customMessage;
+@property NSString *customURL;
+@property NSString *customText;
+@property SNTFileAccessEvent *event;
+@end
+
+@implementation SNTFileAccessMessageWindowController
+
+- (instancetype)initWithEvent:(SNTFileAccessEvent *)event
+                customMessage:(nullable NSString *)message
+                    customURL:(nullable NSString *)url
+                   customText:(nullable NSString *)text {
+  self = [super init];
+  if (self) {
+    _event = event;
+    _customMessage = message;
+    _customURL = url;
+    _customText = text;
+  }
+  return self;
+}
+
+- (void)showWindow:(id)sender {
+  if (self.window) {
+    [self.window orderOut:sender];
+  }
+
+  self.window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 0, 0)
+                                            styleMask:NSWindowStyleMaskBorderless
+                                              backing:NSBackingStoreBuffered
+                                                defer:NO];
+
+  self.window.contentViewController = [SNTFileAccessMessageWindowViewFactory
+    createWithWindow:self.window
+               event:self.event
+       customMessage:self.attributedCustomMessage
+           customURL:[SNTBlockMessage eventDetailURLForFileAccessEvent:self.event
+                                                             customURL:self.customURL]
+                       .absoluteString
+          customText:self.customText
+     uiStateCallback:^(BOOL preventNotificationsForADay) {
+       self.silenceFutureNotifications = preventNotificationsForADay;
+     }];
+
+  self.window.delegate = self;
+
+  // Make sure app doesn't appear in Cmd+Tab or Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyAccessory;
+
+  [super showWindow:sender];
+}
+
+- (void)windowWillClose:(NSNotification *)notification {
+  // Remove app from Cmd+Tab and Dock.
+  NSApp.activationPolicy = NSApplicationActivationPolicyAccessory;
+  [super windowWillClose:notification];
+}
+
+- (NSAttributedString *)attributedCustomMessage {
+  return [SNTBlockMessage attributedBlockMessageForFileAccessEvent:self.event
+                                                     customMessage:self.customMessage];
+}
+
+- (NSString *)messageHash {
+  // The hash for display de-duplication/silencing purposes is a combination of:
+  // 1. The current file access rule version
+  // 2. The name of the rule that was violated
+  // 3. The path of the process
+  return [NSString
+    stringWithFormat:@"%@|%@|%@", self.event.ruleVersion, self.event.ruleName, self.event.filePath];
+}
+
+@end

Source/gui/SNTFileAccessMessageWindowView.swift

@@ -0,0 +1,210 @@
+/// Copyright 2023 Google LLC
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     https://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+
+import SecurityInterface
+import SwiftUI
+
+import santa_common_SNTFileAccessEvent
+
+@available(macOS 13, *)
+@objc public class SNTFileAccessMessageWindowViewFactory : NSObject {
+  @objc public static func createWith(window: NSWindow,
+                                      event: SNTFileAccessEvent,
+                                      customMessage: NSAttributedString?,
+                                      customURL: NSString?,
+                                      customText: NSString?,
+                                      uiStateCallback: ((Bool) -> Void)?) -> NSViewController {
+    return NSHostingController(rootView:SNTFileAccessMessageWindowView(window:window,
+                                                                       event:event,
+                                                                       customMessage:customMessage,
+                                                                       customURL:customURL as String?,
+                                                                       customText:customText as String?,
+                                                                       uiStateCallback:uiStateCallback)
+      .frame(width:800, height:600))
+  }
+}
+
+@available(macOS 13, *)
+struct Property : View {
+  var lbl: String
+  var val: String
+  var propertyAction: (() -> Void)? = nil
+
+  var body: some View {
+    let width: CGFloat? = 150
+
+    HStack(spacing: 5) {
+      HStack {
+        if let block = propertyAction {
+          Button(action: {
+            block()
+          }) {
+            Image(systemName: "info.circle.fill")
+          }.buttonStyle(BorderlessButtonStyle())
+        }
+        Text(lbl + ":")
+          .frame(alignment: .trailing)
+          .lineLimit(1)
+          .font(.system(size: 12, weight: .bold))
+          .padding(Edge.Set.horizontal, 10)
+      }.frame(width: width, alignment: .trailing)
+
+      Text(val)
+        .fixedSize(horizontal: false, vertical: true)
+        .frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
+    }
+
+  }
+}
+
+@available(macOS 13, *)
+struct Event: View {
+  let e: SNTFileAccessEvent
+  let window: NSWindow?
+
+  var body: some View {
+    VStack(spacing:10) {
+      Property(lbl: "Path Accessed", val: e.accessedPath)
+      Property(lbl: "Rule Name", val: e.ruleName)
+      Property(lbl: "Rule Version", val: e.ruleVersion)
+
+      Divider()
+        .frame(width: 700)
+
+      if let app = e.application {
+        Property(lbl: "Application", val: app)
+      }
+
+      if let pub = e.publisherInfo {
+        Property(lbl: "Publisher", val: pub) {
+          SFCertificatePanel.shared()
+                .beginSheet(for: window,
+                            modalDelegate: nil,
+                            didEnd: nil,
+                            contextInfo: nil,
+                            certificates: e.signingChainCertRefs,
+                            showGroup: true)
+        }
+      }
+
+      Property(lbl: "Name", val: (e.filePath as NSString).lastPathComponent)
+      Property(lbl: "Path", val: e.filePath)
+      Property(lbl: "Identifier", val: e.fileSHA256)
+      Property(lbl: "Parent", val: e.parentName + " (" + e.ppid.stringValue + ")")
+    }
+  }
+}
+
+@available(macOS 13, *)
+struct SNTFileAccessMessageWindowView: View {
+  let window: NSWindow?
+  let event: SNTFileAccessEvent?
+  let customMessage: NSAttributedString?
+  let customURL: String?
+  let customText: String?
+  let uiStateCallback: ((Bool) -> Void)?
+
+  @Environment(\.openURL) var openURL
+  @State public var checked = false
+
+  var body: some View {
+    VStack(spacing:20.0) {
+      Spacer()
+      Text("Santa").font(Font.custom("HelveticaNeue-UltraLight", size: 34.0))
+
+      if let msg = customMessage {
+        Text(AttributedString(msg)).multilineTextAlignment(.center).padding(15.0)
+      } else {
+        Text("Access to a protected resource was denied.").multilineTextAlignment(.center).padding(15.0)
+      }
+
+      Event(e: event!, window: window)
+
+      Toggle(isOn: $checked) {
+        Text("Prevent future notifications for this application for a day")
+          .font(Font.system(size: 11.0));
+      }
+
+      VStack(spacing:15) {
+          if customURL != nil {
+            Button(action: openButton, label: {
+
+              Text(customText ?? "Open Event...").frame(maxWidth:.infinity)
+            })
+          }
+          Button(action: dismissButton, label: {
+            Text("Dismiss").frame(maxWidth:.infinity)
+          })
+          .keyboardShortcut(.return)
+      }.frame(width: 220)
+
+      Spacer()
+
+    }.frame(maxWidth:800.0).fixedSize()
+  }
+
+  func openButton() {
+    guard let urlString = customURL else {
+      print("No URL available")
+      return
+    }
+
+    guard let url = URL(string: urlString) else {
+      print("Failed to create URL")
+      return
+    }
+
+    openURL(url)
+  }
+
+  func dismissButton() {
+    if let block = uiStateCallback {
+      block(self.checked)
+    }
+    window?.close()
+  }
+}
+
+@available(macOS 13, *)
+func testFileAccessEvent() -> SNTFileAccessEvent {
+  let faaEvent = SNTFileAccessEvent()
+
+  faaEvent.accessedPath = "/accessed/path"
+  faaEvent.ruleVersion = "watched_path.v1"
+  faaEvent.ruleName = "watched_path"
+  faaEvent.fileSHA256 = "b7c1e3fd640c5f211c89b02c2c6122f78ce322aa5c56eb0bb54bc422a8f8b670"
+  faaEvent.filePath = "/Applications/gShoe.app/Contents/MacOS/gShoe"
+  faaEvent.application = "gShoe"
+  faaEvent.teamID = "EQHXZ8M8AV"
+  faaEvent.signingID = "com.google.gShoe"
+  faaEvent.executingUser = "nobody"
+  faaEvent.pid = 456
+  faaEvent.ppid = 123
+  faaEvent.parentName = "gLauncher"
+
+  return faaEvent
+}
+
+// Enable previews in Xcode.
+@available(macOS 13, *)
+struct SNTFileAccessMessageWindowView_Previews: PreviewProvider {
+  static var previews: some View {
+    SNTFileAccessMessageWindowView(window: nil,
+                                    event: testFileAccessEvent(),
+                            customMessage: nil,
+                                customURL: nil,
+                               customText: nil,
+                          uiStateCallback: nil)
+  }
+}

Source/gui/SNTMessageWindowController.h

@@ -4,7 +4,7 @@
 - (void)windowDidCloseSilenceHash:(NSString *)hash;
 @end
 
-@interface SNTMessageWindowController : NSWindowController
+@interface SNTMessageWindowController : NSWindowController <NSWindowDelegate>
 
 - (IBAction)showWindow:(id)sender;
 - (IBAction)closeWindow:(id)sender;

Source/gui/SNTMessageWindowController.m

@@ -1,14 +1,17 @@
 #import "Source/gui/SNTMessageWindowController.h"
 
-#import "Source/gui/SNTMessageWindow.h"
-
 @implementation SNTMessageWindowController
 
 - (IBAction)showWindow:(id)sender {
-  [(SNTMessageWindow *)self.window fadeIn:sender];
+  [self.window setLevel:NSPopUpMenuWindowLevel];
+  [self.window setMovableByWindowBackground:YES];
+  [self.window makeKeyAndOrderFront:sender];
+  [self.window center];
+  [NSApp activateIgnoringOtherApps:YES];
 }
 - (IBAction)closeWindow:(id)sender {
-  [(SNTMessageWindow *)self.window fadeOut:sender];
+  [self windowWillClose:sender];
+  [self.window close];
 }
 
 - (void)windowWillClose:(NSNotification *)notification {
@@ -21,12 +24,6 @@
   }
 }
 
-- (void)loadWindow {
-  [super loadWindow];
-  [self.window setLevel:NSPopUpMenuWindowLevel];
-  [self.window setMovableByWindowBackground:YES];
-}
-
 - (NSString *)messageHash {
   [self doesNotRecognizeSelector:_cmd];
   return nil;

Source/gui/SNTNotificationManager.h

@@ -15,8 +15,6 @@
 #import <Cocoa/Cocoa.h>
 
 #import "Source/common/SNTXPCNotifierInterface.h"
-#import "Source/gui/SNTBinaryMessageWindowController.h"
-#import "Source/gui/SNTDeviceMessageWindowController.h"
 #import "Source/gui/SNTMessageWindowController.h"
 
 ///

Source/gui/SNTNotificationManager.m

@@ -26,6 +26,9 @@
 #import "Source/common/SNTStrengthify.h"
 #import "Source/common/SNTSyncConstants.h"
 #import "Source/common/SNTXPCControlInterface.h"
+#import "Source/gui/SNTBinaryMessageWindowController.h"
+#import "Source/gui/SNTDeviceMessageWindowController.h"
+#import "Source/gui/SNTFileAccessMessageWindowController.h"
 #import "Source/gui/SNTMessageWindowController.h"
 
 @interface SNTNotificationManager ()
@@ -92,10 +95,16 @@ static NSString *const silencedNotificationsKey = @"SilencedNotifications";
 }
 
 - (void)queueMessage:(SNTMessageWindowController *)pendingMsg {
-  NSString *messageHash = [pendingMsg messageHash];
+  // Post a distributed notification, regardless of queue state.
+  [self postDistributedNotification:pendingMsg];
+
+  // If GUI is in silent mode or if there's already a notification queued for
+  // this message, don't do anything else.
+  if ([SNTConfigurator configurator].enableSilentMode) return;
   if ([self notificationAlreadyQueued:pendingMsg]) return;
 
-  // See if this message is silenced.
+  // See if this message has been user-silenced.
+  NSString *messageHash = [pendingMsg messageHash];
   NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
   NSDate *silenceDate = [ud objectForKey:silencedNotificationsKey][messageHash];
   if ([silenceDate isKindOfClass:[NSDate class]]) {
@@ -114,7 +123,6 @@ static NSString *const silencedNotificationsKey = @"SilencedNotifications";
 
   pendingMsg.delegate = self;
   [self.pendingNotifications addObject:pendingMsg];
-  [self postDistributedNotification:pendingMsg];
 
   if (!self.currentWindowController) {
     [self showQueuedWindow];
@@ -164,7 +172,8 @@ static NSString *const silencedNotificationsKey = @"SilencedNotifications";
 
   [dc postNotificationName:@"com.google.santa.notification.blockedeexecution"
                     object:@"com.google.santa"
-                  userInfo:userInfo];
+                  userInfo:userInfo
+        deliverImmediately:YES];
 }
 
 - (void)showQueuedWindow {
@@ -314,23 +323,21 @@ static NSString *const silencedNotificationsKey = @"SilencedNotifications";
   [un addNotificationRequest:req withCompletionHandler:nil];
 }
 
-- (void)postBlockNotification:(SNTStoredEvent *)event withCustomMessage:(NSString *)message {
-  if ([SNTConfigurator configurator].enableSilentMode) return;
-
+- (void)postBlockNotification:(SNTStoredEvent *)event
+            withCustomMessage:(NSString *)message
+                 andCustomURL:(NSString *)url {
   if (!event) {
     LOGI(@"Error: Missing event object in message received from daemon!");
     return;
   }
 
   SNTBinaryMessageWindowController *pendingMsg =
-    [[SNTBinaryMessageWindowController alloc] initWithEvent:event andMessage:message];
+    [[SNTBinaryMessageWindowController alloc] initWithEvent:event customMsg:message customURL:url];
 
   [self queueMessage:pendingMsg];
 }
 
 - (void)postUSBBlockNotification:(SNTDeviceEvent *)event withCustomMessage:(NSString *)message {
-  if ([SNTConfigurator configurator].enableSilentMode) return;
-
   if (!event) {
     LOGI(@"Error: Missing event object in message received from daemon!");
     return;
@@ -341,6 +348,24 @@ static NSString *const silencedNotificationsKey = @"SilencedNotifications";
   [self queueMessage:pendingMsg];
 }
 
+- (void)postFileAccessBlockNotification:(SNTFileAccessEvent *)event
+                          customMessage:(NSString *)message
+                              customURL:(NSString *)url
+                             customText:(NSString *)text API_AVAILABLE(macos(13.0)) {
+  if (!event) {
+    LOGI(@"Error: Missing event object in message received from daemon!");
+    return;
+  }
+
+  SNTFileAccessMessageWindowController *pendingMsg =
+    [[SNTFileAccessMessageWindowController alloc] initWithEvent:event
+                                                  customMessage:message
+                                                      customURL:url
+                                                     customText:text];
+
+  [self queueMessage:pendingMsg];
+}
+
 #pragma mark SNTBundleNotifierXPC protocol methods
 
 - (void)updateCountsForEvent:(SNTStoredEvent *)event