feat: wrap picotls backend (#10)

2026-01-08 22:38:01 -05:00 · 2025-02-28 14:22:43 -04:00
parent 0ce4b13b1b
commit 0a746cef2e
18 changed files with 11107 additions and 3852 deletions
--- a/.github/actions/install_nim/action.yml
+++ b/.github/actions/install_nim/action.yml
@@ -0,0 +1,133 @@
+name: Install Nim
+inputs:
+  os:
+    description: "Operating system to build for"
+    required: true
+  cpu:
+    description: "CPU to build for"
+    default: "amd64"
+  nim_ref:
+    description: "Nim version"
+    default: "version-1-6"
+  shell:
+    description: "Shell to run commands in"
+    default: "bash --noprofile --norc -e -o pipefail"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install build dependencies (Linux i386)
+      shell: ${{ inputs.shell }}
+      if: inputs.os == 'Linux' && inputs.cpu == 'i386'
+      run: |
+        sudo dpkg --add-architecture i386
+        sudo apt-get update -qq
+        sudo DEBIAN_FRONTEND='noninteractive' apt-get install \
+          --no-install-recommends -yq gcc-multilib g++-multilib \
+          libssl-dev:i386
+        mkdir -p external/bin
+        cat << EOF > external/bin/gcc
+        #!/bin/bash
+        exec $(which gcc) -m32 "\$@"
+        EOF
+        cat << EOF > external/bin/g++
+        #!/bin/bash
+        exec $(which g++) -m32 "\$@"
+        EOF
+        chmod 755 external/bin/gcc external/bin/g++
+        echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH
+
+    - name: MSYS2 (Windows i386)
+      if: inputs.os == 'Windows' && inputs.cpu == 'i386'
+      uses: msys2/setup-msys2@v2
+      with:
+        path-type: inherit
+        msystem: MINGW32
+        install: >-
+          base-devel
+          git
+          mingw-w64-i686-toolchain
+
+    - name: MSYS2 (Windows amd64)
+      if: inputs.os == 'Windows' && inputs.cpu == 'amd64'
+      uses: msys2/setup-msys2@v2
+      with:
+        path-type: inherit
+        install: >-
+          base-devel
+          git
+          mingw-w64-x86_64-toolchain
+
+    - name: Restore Nim DLLs dependencies (Windows) from cache
+      if: inputs.os == 'Windows'
+      id: windows-dlls-cache
+      uses: actions/cache@v4
+      with:
+        path: external/dlls
+        key: 'dlls'
+
+    - name: Install DLL dependencies (Windows)
+      shell: ${{ inputs.shell }}
+      if: >
+        steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
+        inputs.os == 'Windows'
+      run: |
+        mkdir external
+        curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
+        7z x external/windeps.zip -oexternal/dlls
+
+    - name: Path to cached dependencies (Windows)
+      shell: ${{ inputs.shell }}
+      if: >
+        inputs.os == 'Windows'
+      run: |
+        echo '${{ github.workspace }}'"/external/dlls" >> $GITHUB_PATH
+
+    - name: Derive environment variables
+      shell: ${{ inputs.shell }}
+      run: |
+        if [[ '${{ inputs.cpu }}' == 'amd64' ]]; then
+          PLATFORM=x64
+        elif [[ '${{ inputs.cpu }}' == 'arm64' ]]; then
+          PLATFORM=arm64
+        else
+          PLATFORM=x86
+        fi
+        echo "PLATFORM=$PLATFORM" >> $GITHUB_ENV
+
+        ncpu=
+        MAKE_CMD="make"
+        case '${{ inputs.os }}' in
+        'Linux')
+          ncpu=$(nproc)
+          ;;
+        'macOS')
+          ncpu=$(sysctl -n hw.ncpu)
+          ;;
+        'Windows')
+          ncpu=$NUMBER_OF_PROCESSORS
+          MAKE_CMD="mingw32-make"
+          ;;
+        esac
+        [[ -z "$ncpu" || $ncpu -le 0 ]] && ncpu=1
+        echo "ncpu=$ncpu" >> $GITHUB_ENV
+        echo "MAKE_CMD=${MAKE_CMD}" >> $GITHUB_ENV
+        echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH
+
+    - name: Restore Nim from cache
+      id: nim-cache
+      uses: actions/cache@v4
+      with:
+        path: '${{ github.workspace }}/nim'
+        key: ${{ inputs.os }}-${{ inputs.cpu }}-nim-${{ inputs.nim_ref }}-cache-${{ env.cache_nonce }}
+
+    - name: Build Nim and Nimble
+      shell: ${{ inputs.shell }}
+      if: ${{ steps.nim-cache.outputs.cache-hit != 'true' }}
+      run: |
+        # We don't want partial matches of the cache restored
+        rm -rf nim
+        curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
+        env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ inputs.nim_ref }} \
+          QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=gcc \
+          bash build_nim.sh nim csources dist/nimble NimBinaries
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,14 +1,116 @@
-name: CI
+name: Continuous Integration
+
 on:
  push:
    branches:
      - master
  pull_request:
+  merge_group:
  workflow_dispatch:

+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
-  build:
-    uses: status-im/nimbus-common-workflow/.github/workflows/common.yml@main
-    with:
-      test-command: |
-        nimble test --styleCheck:off
+  test:
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - os: linux
+            cpu: amd64
+          - os: linux
+            cpu: i386
+          - os: linux-gcc-14
+            cpu: amd64
+          - os: macos
+            cpu: amd64
+          - os: macos-14
+            cpu: arm64
+          - os: windows
+            cpu: amd64
+        nim:
+          - ref: version-1-6
+            memory_management: refc
+          - ref: version-2-0
+            memory_management: refc
+        include:
+          - platform:
+              os: linux
+            builder: ubuntu-22.04
+            shell: bash
+          - platform:
+              os: linux-gcc-14
+            builder: ubuntu-24.04
+            shell: bash
+          - platform:
+              os: macos
+            builder: macos-13
+            shell: bash
+          - platform:
+              os: macos-14
+            builder: macos-14
+            shell: bash
+          - platform:
+              os: windows
+            builder: windows-2022
+            shell: msys2 {0}
+
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
+
+    name: '${{ matrix.platform.os }}-${{ matrix.platform.cpu }} (Nim ${{ matrix.nim.ref }})'
+    runs-on: ${{ matrix.builder }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Setup Nim
+        uses: "./.github/actions/install_nim"
+        with:
+          os: ${{ matrix.platform.os }}
+          cpu: ${{ matrix.platform.cpu }}
+          shell: ${{ matrix.shell }}
+          nim_ref: ${{ matrix.nim.ref }}
+
+      - name: Restore deps from cache
+        id: deps-cache
+        uses: actions/cache@v3
+        with:
+          path: nimbledeps
+          # Using nim.ref as a simple way to differentiate between nimble using the "pkgs" or "pkgs2" directories.
+          # The change happened on Nimble v0.14.0. Also forcing the deps to be reinstalled on each os and cpu.
+          key: nimbledeps-${{ matrix.nim.ref }}-${{ matrix.builder }}-${{ matrix.platform.cpu }}-${{ hashFiles('.pinned') }} # hashFiles returns a different value on windows
+
+      - name: Install deps
+        if: ${{ steps.deps-cache.outputs.cache-hit != 'true' }}
+        run: |
+          nimble install
+
+      - name: Use gcc 14
+        if : ${{ matrix.platform.os == 'linux-gcc-14'}}
+        run: |
+          # Add GCC-14 to alternatives
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 14
+
+          # Set GCC-14 as the default
+          sudo update-alternatives --set gcc /usr/bin/gcc-14
+
+      - name: Install deps (windows)
+        if : ${{ matrix.platform.os == 'windows'}}
+        run: |
+          pacman -S --noconfirm base-devel gcc
+
+      - name: Run tests
+        run: |
+          nim --version
+          nimble --version
+          gcc --version
+
+          NIMFLAGS="${NIMFLAGS} --mm:${{ matrix.nim.memory_management }}"
+          nimble test --styleCheck:off --verbose --debug
--- a/.gitignore
+++ b/.gitignore
@@ -1,16 +1,2 @@
-*
-!*/
-!*.*
-
-# ignore all cmake build files, except version.h
-build/*
-!build/lib/
-build/lib/*
-!build/lib/includes/
-build/lib/includes/*
-!build/lib/includes/ngtcp2/
-build/lib/includes/ngtcp2/*
-!build/lib/includes/ngtcp2/version.h
-
-!LICENSE-MIT
-!LICENSE-APACHEv2
+!libs/
+!libs/*
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
-[submodule "sources"]
-	path = sources
-	url = https://github.com/ngtcp2/ngtcp2.git
+[submodule "libs/ngtcp2"]
+	path = libs/ngtcp2
+	url = https://github.com/ngtcp2/ngtcp2
+[submodule "libs/picotls"]
+	path = libs/picotls
+	url = https://github.com/h2o/picotls
--- a/build.sh
+++ b/build.sh
@@ -1,35 +1,39 @@
 #!/bin/bash
 root=$(dirname "$0")
+sources=${root}/libs

-# install nimterop, if not already installed
-if ! [ -x "$(command -v toast)" ]; then
-  nimble install -y nimterop@2532ce0
-fi
-
-# run cmake on ngtcp2 sources
-cmake -S "${root}/sources" -B "${root}/build"
-
-# add prelude
-cat "${root}/prelude.nim" > "${root}/ngtcp2.nim"
-
-# dividing line
-echo >> "${root}/ngtcp2.nim"
+rm -f ngtcp2.nim

 # assemble list of C files to be compiled
-for file in `ls "${root}/sources/lib"/*.c`; do
-  compile="${compile} --compile=${file}"
+toCompile=(
+  "${sources}/picotls/picotlsvs/picotls/wintimeofday.c"
+  "${sources}/picotls/lib/pembase64.c"
+  "${sources}/picotls/lib/hpke.c"
+  "${sources}/picotls/lib/picotls.c"
+  "${sources}/picotls/lib/openssl.c"
+)
+
+for file in `ls "${sources}/ngtcp2/crypto"/*.c`; do
+  toCompile+=("$file")
+done
+for file in `ls "${sources}/ngtcp2/crypto/picotls"/*.c`; do
+  toCompile+=("$file")
+done
+for file in `ls "${sources}/ngtcp2/lib"/*.c`; do
+  toCompile+=("$file")
+done
+for file in `ls "${root}/build/lib"/*.c`; do
+  toCompile+=("$file")
 done

-# generate nim wrapper with nimterop
-toast \
-  $compile \
-  --pnim \
-  --preprocess \
-  --noHeader \
-  --defines=NGTCP2_STATICLIB \
-  --replace=sockaddr=SockAddr,SockAddr_storage=Sockaddr_storage,socklen_t=SockLen \
-  --includeDirs="${root}/sources/lib/includes" \
-  --includeDirs="${root}/build/lib/includes" \
-  "${root}/sources/lib/includes/ngtcp2/ngtcp2.h" >> "${root}/ngtcp2.nim"
+nim c --maxLoopIterationsVM:100000000 generate_ngtcp2.nim

-sed -i 's/\bpassC\b/passc/g' ngtcp2.nim
+# add prelude
+cat "${root}/prelude.nim" > ngtcp2.nim
+
+for file in "${toCompile[@]}"; do
+    echo "{.compile: \"$file\".}" >> ngtcp2.nim
+done
+
+cat tmp_ngtcp2.nim >> ngtcp2.nim
+rm -f tmp_ngtcp2.nim
--- a/build/lib/cred_buffer.c
+++ b/build/lib/cred_buffer.c
@@ -0,0 +1,140 @@
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "utils/cred_buffer.h"
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+static int cred_buffer_getc(ptls_cred_buffer_t *buf)
+{
+    return PTLS_CRED_BUFFER_LEFT(buf) > 0 ? buf->base[buf->off++] : -1;
+}
+
+static ssize_t fsize(FILE *fp)
+{
+    long sz;
+
+    if (fseek(fp, 0, SEEK_END) == -1 || (sz = ftell(fp)) == -1) {
+        return -1;
+    }
+
+    rewind(fp);
+
+    return (ssize_t) sz;
+}
+
+/* The caller owns 'mem' and must have called ptls_buffer_init prior to
+ * invoking this function */
+int ptls_cred_buffer_set_from_file(ptls_cred_buffer_t *buf, const char *fname)
+{
+    FILE *fp = NULL;
+    ssize_t sz;
+    char *m = NULL;
+
+#ifdef _WINDOWS
+    errno_t err = fopen_s(&fp, fname, "r");
+    if (err != 0) {
+        return -1;
+    }
+#else
+    fp = fopen(fname, "r");
+    if (fp == NULL) {
+        return -1;
+    }
+#endif
+
+    if ((sz = fsize(fp)) == -1 ||
+        (m = malloc(sz)) == NULL ||
+        fread(m, sz, 1, fp) != 1) {
+        goto err;
+    }
+
+    (void) fclose(fp);
+
+    buf->base = m;
+    buf->len = sz;
+    buf->off = 0;
+    buf->owns_base = 1;
+
+    return 0;
+err:
+    if (m)
+        free(m);
+    if (fp != NULL)
+      (void) fclose(fp);
+
+    return -1;
+}
+
+int ptls_cred_buffer_set_from_string(ptls_cred_buffer_t *buf, char *s)
+{
+    buf->base = s;
+    buf->len = strlen(s);
+    buf->off = 0;
+    buf->owns_base = 0;
+
+    return 0;
+}
+
+void ptls_cred_buffer_dispose(ptls_cred_buffer_t *buf)
+{
+    if (buf->owns_base) {
+        if (buf->base) {
+            free(buf->base);
+            buf->base = NULL;
+        }
+        buf->len = buf->off = 0;
+        buf->owns_base = 0;
+    }
+
+    return;
+}
+
+void ptls_cred_buffer_rewind(ptls_cred_buffer_t *buf)
+{
+    buf->off = 0;
+    return;
+}
+
+/* z -> nlptr */
+char *ptls_cred_buffer_gets(char *s, int n, ptls_cred_buffer_t *buf)
+{
+    char *p = s;
+    char *z;
+    size_t k;
+    int c;
+
+    if (n-- <= 1) {
+        if (n) return NULL;
+        *s = '\0';
+        return s;
+    }
+
+    while (n) {
+        if (PTLS_CRED_BUFFER_RPOS(buf) != PTLS_CRED_BUFFER_REND(buf)) {
+            z = memchr(PTLS_CRED_BUFFER_RPOS(buf), '\n', PTLS_CRED_BUFFER_LEFT(buf));
+            k = z ? z - PTLS_CRED_BUFFER_RPOS(buf) + 1 : PTLS_CRED_BUFFER_LEFT(buf);
+            k = MIN(k, n);
+            memcpy(p, PTLS_CRED_BUFFER_RPOS(buf), k);
+            buf->off += k;
+            p += k;
+            n -= k;
+            if (z || !n) break;
+        }
+
+        if ((c = cred_buffer_getc(buf)) < 0) {
+            if (p == s || PTLS_CRED_BUFFER_LEFT(buf) > 0) s = NULL;
+            break;
+        }
+
+        n--;
+
+        if ((*p++ = c) == '\n') break;
+    }
+
+    if (s) *p = '\0';
+
+    return s;
+}
--- a/build/lib/includes/utils/cred_buffer.h
+++ b/build/lib/includes/utils/cred_buffer.h
@@ -0,0 +1,24 @@
+
+#ifndef PTLS_CRED_BUFFER_H
+#define PTLS_CRED_BUFFER_H
+
+#include <stddef.h>
+#include "picotls.h"
+
+typedef struct ptls_cred_buffer_s {
+    char *base;
+    size_t len;
+    size_t off;
+    int owns_base;
+#define PTLS_CRED_BUFFER_RPOS(buf) ((buf)->base + (buf)->off)
+#define PTLS_CRED_BUFFER_REND(buf) ((buf)->base + (buf)->len)
+#define PTLS_CRED_BUFFER_LEFT(buf) ((buf)->len - (buf)->off)
+} ptls_cred_buffer_t;
+
+int ptls_cred_buffer_set_from_file(ptls_cred_buffer_t *buf, const char *fname);
+int ptls_cred_buffer_set_from_string(ptls_cred_buffer_t *buf, char *s);
+void ptls_cred_buffer_dispose(ptls_cred_buffer_t *buf);
+void ptls_cred_buffer_rewind(ptls_cred_buffer_t *buf);
+char *ptls_cred_buffer_gets(char *s, int n, ptls_cred_buffer_t *buf);
+
+#endif  /* !PTLS_CRED_BUFFER_H */
--- a/build/lib/includes/utils/pem_utils.h
+++ b/build/lib/includes/utils/pem_utils.h
@@ -0,0 +1,28 @@
+/*
+* Copyright (c) 2017 Christian Huitema <huitema@huitema.net>
+*
+* Permission to use, copy, modify, and distribute this software for any
+* purpose with or without fee is hereby granted, provided that the above
+* copyright notice and this permission notice appear in all copies.
+*
+* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef PTLS_PEM_UTILS
+#define PTLS_PEM_UTILS
+
+#include <picotls.h>
+#include <picotls/openssl.h>
+#include "cred_buffer.h"
+
+int ptls_load_certificates_from_memory(ptls_context_t *ctx, ptls_cred_buffer_t *mem);
+
+int ptls_openssl_init_sign_certificate_with_mem_key(ptls_openssl_sign_certificate_t *self, const void *buf, int len);
+
+#endif /* PTLS_PEM_UTILS */
--- a/build/lib/includes/wincompat.h
+++ b/build/lib/includes/wincompat.h
@@ -0,0 +1,37 @@
+#ifndef WINCOMPAT_H
+#define WINCOMPAT_H
+
+#include <stdint.h>
+#define ssize_t int
+#include <Winsock2.h>
+#include <ws2tcpip.h>
+#include <malloc.h>
+
+#ifndef gettimeofday
+#define gettimeofday wintimeofday
+
+#ifndef __attribute__
+#define __attribute__(X)
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+struct tzone {
+    int tz_minuteswest; /* minutes west of Greenwich */
+    int tz_dsttime;     /* type of DST correction */
+};
+
+int wintimeofday(struct timeval *tv, struct tzone *tz);
+
+#ifndef strcasecmp
+#define strcasecmp _stricmp
+#endif
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif
+
+#endif /* WINCOMPAT_H */
--- a/build/lib/pem_utils.c
+++ b/build/lib/pem_utils.c
@@ -0,0 +1,152 @@
+#include <stdlib.h>
+#include <picotls.h>
+#include <picotls/pembase64.h>
+#include "utils/pem_utils.h"
+#include <openssl/pem.h>
+#include <openssl/evp.h>
+#include <openssl/ec.h>
+#include <openssl/err.h>
+
+static int ptls_compare_separator_line(const char *line, const char *begin_or_end, const char *label)
+{
+    int ret = strncmp(line, "-----", 5);
+    size_t text_index = 5;
+
+    if (ret == 0) {
+        size_t begin_or_end_length = strlen(begin_or_end);
+        ret = strncmp(line + text_index, begin_or_end, begin_or_end_length);
+        text_index += begin_or_end_length;
+    }
+
+    if (ret == 0) {
+        ret = line[text_index] - ' ';
+        text_index++;
+    }
+
+    if (ret == 0) {
+        size_t label_length = strlen(label);
+        ret = strncmp(line + text_index, label, label_length);
+        text_index += label_length;
+    }
+
+    if (ret == 0) {
+        ret = strncmp(line + text_index, "-----", 5);
+    }
+
+    return ret;
+}
+
+// Extracted from https://github.com/h2o/picotls/pull/284/
+// Remove both pem.c/h and cred_buffer.c/h once that PR gets merged
+static int ptls_get_pem_object_from_memory(ptls_cred_buffer_t *mem, const char *label, ptls_buffer_t *buf)
+{
+    int ret = PTLS_ERROR_PEM_LABEL_NOT_FOUND;
+    char line[256];
+    ptls_base64_decode_state_t state;
+
+    /* Get the label on a line by itself */
+    while (ptls_cred_buffer_gets(line, 256, mem)) {
+        if (ptls_compare_separator_line(line, "BEGIN", label) == 0) {
+            ret = 0;
+            ptls_base64_decode_init(&state);
+            break;
+        }
+    }
+    /* Get the data in the buffer */
+    while (ret == 0 && ptls_cred_buffer_gets(line, 256, mem)) {
+        if (ptls_compare_separator_line(line, "END", label) == 0) {
+            if (state.status == PTLS_BASE64_DECODE_DONE || (state.status == PTLS_BASE64_DECODE_IN_PROGRESS && state.nbc == 0)) {
+                ret = 0;
+            } else {
+                ret = PTLS_ERROR_INCORRECT_BASE64;
+            }
+            break;
+        } else {
+            ret = ptls_base64_decode(line, &state, buf);
+        }
+    }
+
+    return ret;
+}
+
+
+
+int ptls_load_pem_objects_from_memory(ptls_cred_buffer_t *mem, const char *label, ptls_iovec_t *list, size_t list_max, size_t *nb_objects)
+{
+    int ret = 0;
+    size_t count = 0;
+
+    *nb_objects = 0;
+
+    if (ret == 0) {
+        while (count < list_max) {
+            ptls_buffer_t buf;
+
+            ptls_buffer_init(&buf, "", 0);
+
+            ret = ptls_get_pem_object_from_memory(mem, label, &buf);
+
+            if (ret == 0) {
+                if (buf.off > 0 && buf.is_allocated) {
+                    list[count].base = buf.base;
+                    list[count].len = buf.off;
+                    count++;
+                } else {
+                    ptls_buffer_dispose(&buf);
+                }
+            } else {
+                ptls_buffer_dispose(&buf);
+                break;
+            }
+        }
+    }
+
+    if (ret == PTLS_ERROR_PEM_LABEL_NOT_FOUND && count > 0) {
+        ret = 0;
+    }
+
+    *nb_objects = count;
+
+    return ret;
+}
+
+
+
+#define PTLS_MAX_CERTS_IN_CONTEXT 16
+
+int ptls_load_certificates_from_memory(ptls_context_t *ctx, ptls_cred_buffer_t *mem)
+{
+    int ret = 0;
+
+    ctx->certificates.list = (ptls_iovec_t *)malloc(PTLS_MAX_CERTS_IN_CONTEXT * sizeof(ptls_iovec_t));
+
+    if (ctx->certificates.list == NULL) {
+        ret = PTLS_ERROR_NO_MEMORY;
+    } else {
+        ret = ptls_load_pem_objects_from_memory(mem, "CERTIFICATE", ctx->certificates.list, PTLS_MAX_CERTS_IN_CONTEXT,
+                                    &ctx->certificates.count);
+    }
+
+    return ret;
+}
+
+
+int ptls_openssl_init_sign_certificate_with_mem_key(ptls_openssl_sign_certificate_t *self, const void *buf, int len) {   
+    BIO *bio = BIO_new_mem_buf(buf, len);
+    if (bio == NULL) {
+        return 8880;
+    }
+
+    EVP_PKEY *evp_key = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
+    BIO_free(bio);
+    if (evp_key == NULL) {
+        return 8881;
+    }
+
+    // Initialize the certificate signing structure
+    int ret = ptls_openssl_init_sign_certificate(self, evp_key);
+
+    EVP_PKEY_free(evp_key);
+
+    return ret;
+}
--- a/generate_ngtcp2.nim
+++ b/generate_ngtcp2.nim
@@ -0,0 +1,16 @@
+import futhark, strformat
+from os import parentDir, `/`
+
+importc:
+    outputPath currentSourcePath.parentDir / "tmp_ngtcp2.nim"
+    path currentSourcePath.parentDir/"libs/ngtcp2/lib/includes"
+    path currentSourcePath.parentDir/"build/lib/includes"
+    path currentSourcePath.parentDir/"libs/ngtcp2/crypto/includes/"
+    path currentSourcePath.parentDir/"libs"/"picotls"/"include"
+    "ngtcp2/ngtcp2.h"
+    "ngtcp2/ngtcp2_crypto.h"
+    "picotls.h"
+    "picotls/openssl.h"
+    "ngtcp2/ngtcp2_crypto_picotls.h"
+    "utils/cred_buffer.h"
+    "utils/pem_utils.h"
--- a/libs/ngtcp2
+++ b/libs/ngtcp2
--- a/libs/picotls
+++ b/libs/picotls
--- a/ngtcp2.nim
+++ b/ngtcp2.nim
--- a/ngtcp2.nimble
+++ b/ngtcp2.nimble
@@ -3,7 +3,7 @@ version = "0.34.0"
 author = "Status Research & Development GmbH"
 description = "Nim wrapper around the ngtcp2 library"
 license = "MIT"
-installDirs = @["sources", "build"]
+installDirs = @["libs", "build"]
 installFiles = @["ngtcp2.nim"]

 requires "nim >= 1.6.0"
--- a/prelude.nim
+++ b/prelude.nim
@@ -6,12 +6,28 @@ import nativesockets

 when defined(windows):
  {.passl: "-lws2_32".}
+  {.passc: "-D_WINDOWS".}
 else:
-  {.passC: "-DHAVE_UNISTD_H".}
+  {.passc: "-DHAVE_UNISTD_H".}
+
+when defined(macosx):
+  {.passl: "-L/opt/homebrew/opt/openssl@3/lib -lcrypto".}
+  {.passc: "-I/opt/homebrew/opt/openssl@3/include".}
+else:
+  {.passl: "-lcrypto".}

-# C include directories
 const root = currentSourcePath.parentDir
-const sourceInclude = root/"sources"/"lib"/"includes"
-const buildInclude = root/"build"/"lib"/"includes"
+const libIncludes          = root/"build"/"lib"/"includes"
+const ngtcp2Crypto         = root/"libs"/"ngtcp2"/"crypto"
+const ngtcp2CryptoIncludes = root/"libs"/"ngtcp2"/"crypto"/"includes"
+const ngtcp2Lib            = root/"libs"/"ngtcp2"/"lib"
+const ngtcp2LibIncludes    = root/"libs"/"ngtcp2"/"lib"/"includes"
+const picotlsInclude       = root/"libs"/"picotls"/"include"
+
+{.passc: fmt"-I{libIncludes}".}
+{.passc: fmt"-I{ngtcp2Crypto}".}
+{.passc: fmt"-I{ngtcp2CryptoIncludes}".}
+{.passc: fmt"-I{ngtcp2Lib}".}
+{.passc: fmt"-I{ngtcp2LibIncludes}".}
+{.passc: fmt"-I{picotlsInclude}".}

-{.passc: fmt"-I{sourceInclude} -I{buildInclude}".}
--- a/1
+++ b/1
--- a/tests/testNgtcp2.nim
+++ b/tests/testNgtcp2.nim
@@ -9,3 +9,13 @@ test "default settings":
  var transport_params: ngtcp2_transport_params
  ngtcp2_transport_params_default_versioned(NGTCP2_TRANSPORT_PARAMS_V1, addr transport_params)
  check transport_params.active_connection_id_limit > 0
+
+test "ptls_instantiation":
+  var ctx: ptls_context_t
+  ctx.random_bytes = ptls_openssl_random_bytes
+  ctx.get_time = addr ptls_get_time
+  ctx.key_exchanges =  cast[ptr ptr ptls_key_exchange_algorithm_t](addr ptls_openssl_key_exchanges[0])
+  ctx.cipher_suites = cast[ptr ptr ptls_cipher_suite_t](ptls_openssl_cipher_suites[0])
+  
+  var tls: ptr ptls_t = ptls_client_new(addr ctx);
+  check tls != nil