Switch over to sha256-simd (#3125)

shared/hashutil/BUILD.bazel

@@ -10,6 +10,7 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "@com_github_gogo_protobuf//proto:go_default_library",
+        "@com_github_minio_sha256_simd//:go_default_library",
         "@org_golang_x_crypto//sha3:go_default_library",
     ],
 )

shared/hashutil/hash.go

@@ -1,11 +1,11 @@
 package hashutil
 
 import (
-	"crypto/sha256"
 	"errors"
 	"reflect"
 
 	"github.com/gogo/protobuf/proto"
+	"github.com/minio/sha256-simd"
 	"golang.org/x/crypto/sha3"
 )
 

shared/keystore/BUILD.bazel

@@ -15,6 +15,7 @@ go_library(
         "//proto/eth/v1alpha1:go_default_library",
         "//shared/bls:go_default_library",
         "//shared/params:go_default_library",
+        "@com_github_minio_sha256_simd//:go_default_library",
         "@com_github_pborman_uuid//:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_go_ssz//:go_default_library",

shared/keystore/keystore.go

@@ -22,7 +22,6 @@ import (
 	"bytes"
 	"crypto/aes"
 	"crypto/rand"
-	"crypto/sha256"
 	"encoding/hex"
 	"encoding/json"
 	"errors"
@@ -32,6 +31,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/minio/sha256-simd"
 	"github.com/pborman/uuid"
 	"github.com/prysmaticlabs/prysm/shared/bls"
 	"golang.org/x/crypto/pbkdf2"