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[dev.boringcrypto] crypto/internal/boring: make SHA calls allocation-free

Browse Source 
The standard Go implementations are allocation-free.
Making the BoringCrypto ones the same helps avoid
surprises, including in some of our own tests.

For #51940.

Change-Id: Ic9c5dc46f5e29ca85f571244be2b380ec2cf89c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/395876
Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Russ Cox 2022-04-27 09:02:53 -04:00
parent 3cb10d14b7
commit 0ec08283c8
13 changed files with 265 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/crypto/ed25519/ed25519_test.go
View File

@ -9,6 +9,7 @@ import (
"bytes"
"compress/gzip"
"crypto"
"crypto/internal/boring"
"crypto/rand"
"encoding/hex"
"os"
@ -186,7 +187,9 @@ func TestMalleability(t *testing.T) {
}
func TestAllocations(t *testing.T) {
t.Skip("skipping allocations test on Go+BoringCrypto, as cgo causes allocations")
if boring.Enabled {
t.Skip("skipping allocations test with BoringCrypto")
}
if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-noopt") {
t.Skip("skipping allocations test without relevant optimizations")
}
@ -200,7 +203,7 @@ func TestAllocations(t *testing.T) {
t.Fatal("signature didn't verify")
}
}); allocs > 0 {
t.Errorf("expected zero allocations, got %0.1v", allocs)
t.Errorf("expected zero allocations, got %0.1f", allocs)
}
}

1
src/crypto/ed25519/internal/edwards25519/edwards25519_test.go
View File

@ -281,7 +281,6 @@ func TestNonCanonicalPoints(t *testing.T) {
var testAllocationsSink byte
func TestAllocations(t *testing.T) {
t.Skip("skipping allocations test on Go+BoringCrypto, as cgo causes allocations")
if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-noopt") {
t.Skip("skipping allocations test without relevant optimizations")
}

12
src/crypto/internal/boring/boring.go
View File

@ -97,3 +97,15 @@ func bigToBn(bnp **C.GO_BIGNUM, b *big.Int) bool {
*bnp = bn
return true
}
// noescape hides a pointer from escape analysis. noescape is
// the identity function but escape analysis doesn't think the
// output depends on the input. noescape is inlined and currently
// compiles down to zero instructions.
// USE CAREFULLY!
//
//go:nosplit
func noescape(p unsafe.Pointer) unsafe.Pointer {
x := uintptr(p)
return unsafe.Pointer(x ^ 0)
}

6
src/crypto/internal/boring/notboring.go
View File

@ -42,6 +42,12 @@ func NewSHA256() hash.Hash { panic("boringcrypto: not available") }
func NewSHA384() hash.Hash { panic("boringcrypto: not available") }
func NewSHA512() hash.Hash { panic("boringcrypto: not available") }
func SHA1([]byte) [20]byte { panic("boringcrypto: not available") }
func SHA224([]byte) [28]byte { panic("boringcrypto: not available") }
func SHA256([]byte) [32]byte { panic("boringcrypto: not available") }
func SHA384([]byte) [48]byte { panic("boringcrypto: not available") }
func SHA512([]byte) [64]byte { panic("boringcrypto: not available") }
func NewHMAC(h func() hash.Hash, key []byte) hash.Hash { panic("boringcrypto: not available") }
func NewAESCipher(key []byte) (cipher.Block, error) { panic("boringcrypto: not available") }

205
src/crypto/internal/boring/sha.go
View File

@ -7,7 +7,55 @@
package boring
// #include "goboringcrypto.h"
/*
#include "goboringcrypto.h"
int
_goboringcrypto_gosha1(void *p, size_t n, void *out)
{
GO_SHA_CTX ctx;
_goboringcrypto_SHA1_Init(&ctx);
return _goboringcrypto_SHA1_Update(&ctx, p, n) &&
_goboringcrypto_SHA1_Final(out, &ctx);
}
int
_goboringcrypto_gosha224(void *p, size_t n, void *out)
{
GO_SHA256_CTX ctx;
_goboringcrypto_SHA224_Init(&ctx);
return _goboringcrypto_SHA224_Update(&ctx, p, n) &&
_goboringcrypto_SHA224_Final(out, &ctx);
}
int
_goboringcrypto_gosha256(void *p, size_t n, void *out)
{
GO_SHA256_CTX ctx;
_goboringcrypto_SHA256_Init(&ctx);
return _goboringcrypto_SHA256_Update(&ctx, p, n) &&
_goboringcrypto_SHA256_Final(out, &ctx);
}
int
_goboringcrypto_gosha384(void *p, size_t n, void *out)
{
GO_SHA512_CTX ctx;
_goboringcrypto_SHA384_Init(&ctx);
return _goboringcrypto_SHA384_Update(&ctx, p, n) &&
_goboringcrypto_SHA384_Final(out, &ctx);
}
int
_goboringcrypto_gosha512(void *p, size_t n, void *out)
{
GO_SHA512_CTX ctx;
_goboringcrypto_SHA512_Init(&ctx);
return _goboringcrypto_SHA512_Update(&ctx, p, n) &&
_goboringcrypto_SHA512_Final(out, &ctx);
}
*/
import "C"
import (
"errors"
@ -15,6 +63,48 @@ import (
"unsafe"
)
func addr(p []byte) unsafe.Pointer {
if len(p) == 0 {
return nil
}
return unsafe.Pointer(&p[0])
}
func SHA1(p []byte) (sum [20]byte) {
if C._goboringcrypto_gosha1(noescape(addr(p)), C.size_t(len(p)), noescape(unsafe.Pointer(&sum[0]))) == 0 {
panic("boringcrypto: SHA1 failed")
}
return
}
func SHA224(p []byte) (sum [28]byte) {
if C._goboringcrypto_gosha224(noescape(addr(p)), C.size_t(len(p)), noescape(unsafe.Pointer(&sum[0]))) == 0 {
panic("boringcrypto: SHA224 failed")
}
return
}
func SHA256(p []byte) (sum [32]byte) {
if C._goboringcrypto_gosha256(noescape(addr(p)), C.size_t(len(p)), noescape(unsafe.Pointer(&sum[0]))) == 0 {
panic("boringcrypto: SHA256 failed")
}
return
}
func SHA384(p []byte) (sum [48]byte) {
if C._goboringcrypto_gosha384(noescape(addr(p)), C.size_t(len(p)), noescape(unsafe.Pointer(&sum[0]))) == 0 {
panic("boringcrypto: SHA384 failed")
}
return
}
func SHA512(p []byte) (sum [64]byte) {
if C._goboringcrypto_gosha512(noescape(addr(p)), C.size_t(len(p)), noescape(unsafe.Pointer(&sum[0]))) == 0 {
panic("boringcrypto: SHA512 failed")
}
return
}
// NewSHA1 returns a new SHA1 hash.
func NewSHA1() hash.Hash {
h := new(sha1Hash)
@ -34,24 +124,31 @@ type sha1Ctx struct {
nx uint32
}
func (h *sha1Hash) Reset() { C._goboringcrypto_SHA1_Init(&h.ctx) }
func (h *sha1Hash) Size() int { return 20 }
func (h *sha1Hash) BlockSize() int { return 64 }
func (h *sha1Hash) Sum(in []byte) []byte { return append(in, h.sum()...) }
func (h *sha1Hash) noescapeCtx() *C.GO_SHA_CTX {
return (*C.GO_SHA_CTX)(noescape(unsafe.Pointer(&h.ctx)))
}
func (h *sha1Hash) Reset() {
C._goboringcrypto_SHA1_Init(h.noescapeCtx())
}
func (h *sha1Hash) Size() int { return 20 }
func (h *sha1Hash) BlockSize() int { return 64 }
func (h *sha1Hash) Sum(dst []byte) []byte { return h.sum(dst) }
func (h *sha1Hash) Write(p []byte) (int, error) {
if len(p) > 0 && C._goboringcrypto_SHA1_Update(&h.ctx, unsafe.Pointer(&p[0]), C.size_t(len(p))) == 0 {
if len(p) > 0 && C._goboringcrypto_SHA1_Update(h.noescapeCtx(), noescape(addr(p)), C.size_t(len(p))) == 0 {
panic("boringcrypto: SHA1_Update failed")
}
return len(p), nil
}
func (h0 *sha1Hash) sum() []byte {
func (h0 *sha1Hash) sum(dst []byte) []byte {
h := *h0 // make copy so future Write+Sum is valid
if C._goboringcrypto_SHA1_Final((*C.uint8_t)(unsafe.Pointer(&h.out[0])), &h.ctx) == 0 {
if C._goboringcrypto_SHA1_Final((*C.uint8_t)(noescape(unsafe.Pointer(&h.out[0]))), h.noescapeCtx()) == 0 {
panic("boringcrypto: SHA1_Final failed")
}
return h.out[:]
return append(dst, h.out[:]...)
}
const (
@ -108,24 +205,30 @@ type sha224Hash struct {
out [224 / 8]byte
}
func (h *sha224Hash) Reset() { C._goboringcrypto_SHA224_Init(&h.ctx) }
func (h *sha224Hash) Size() int { return 224 / 8 }
func (h *sha224Hash) BlockSize() int { return 64 }
func (h *sha224Hash) Sum(in []byte) []byte { return append(in, h.sum()...) }
func (h *sha224Hash) noescapeCtx() *C.GO_SHA256_CTX {
return (*C.GO_SHA256_CTX)(noescape(unsafe.Pointer(&h.ctx)))
}
func (h *sha224Hash) Reset() {
C._goboringcrypto_SHA224_Init(h.noescapeCtx())
}
func (h *sha224Hash) Size() int { return 224 / 8 }
func (h *sha224Hash) BlockSize() int { return 64 }
func (h *sha224Hash) Sum(dst []byte) []byte { return h.sum(dst) }
func (h *sha224Hash) Write(p []byte) (int, error) {
if len(p) > 0 && C._goboringcrypto_SHA224_Update(&h.ctx, unsafe.Pointer(&p[0]), C.size_t(len(p))) == 0 {
if len(p) > 0 && C._goboringcrypto_SHA224_Update(h.noescapeCtx(), noescape(addr(p)), C.size_t(len(p))) == 0 {
panic("boringcrypto: SHA224_Update failed")
}
return len(p), nil
}
func (h0 *sha224Hash) sum() []byte {
func (h0 *sha224Hash) sum(dst []byte) []byte {
h := *h0 // make copy so future Write+Sum is valid
if C._goboringcrypto_SHA224_Final((*C.uint8_t)(unsafe.Pointer(&h.out[0])), &h.ctx) == 0 {
if C._goboringcrypto_SHA224_Final((*C.uint8_t)(noescape(unsafe.Pointer(&h.out[0]))), h.noescapeCtx()) == 0 {
panic("boringcrypto: SHA224_Final failed")
}
return h.out[:]
return append(dst, h.out[:]...)
}
// NewSHA256 returns a new SHA256 hash.
@ -140,24 +243,30 @@ type sha256Hash struct {
out [256 / 8]byte
}
func (h *sha256Hash) Reset() { C._goboringcrypto_SHA256_Init(&h.ctx) }
func (h *sha256Hash) Size() int { return 256 / 8 }
func (h *sha256Hash) BlockSize() int { return 64 }
func (h *sha256Hash) Sum(in []byte) []byte { return append(in, h.sum()...) }
func (h *sha256Hash) noescapeCtx() *C.GO_SHA256_CTX {
return (*C.GO_SHA256_CTX)(noescape(unsafe.Pointer(&h.ctx)))
}
func (h *sha256Hash) Reset() {
C._goboringcrypto_SHA256_Init(h.noescapeCtx())
}
func (h *sha256Hash) Size() int { return 256 / 8 }
func (h *sha256Hash) BlockSize() int { return 64 }
func (h *sha256Hash) Sum(dst []byte) []byte { return h.sum(dst) }
func (h *sha256Hash) Write(p []byte) (int, error) {
if len(p) > 0 && C._goboringcrypto_SHA256_Update(&h.ctx, unsafe.Pointer(&p[0]), C.size_t(len(p))) == 0 {
if len(p) > 0 && C._goboringcrypto_SHA256_Update(h.noescapeCtx(), noescape(addr(p)), C.size_t(len(p))) == 0 {
panic("boringcrypto: SHA256_Update failed")
}
return len(p), nil
}
func (h0 *sha256Hash) sum() []byte {
func (h0 *sha256Hash) sum(dst []byte) []byte {
h := *h0 // make copy so future Write+Sum is valid
if C._goboringcrypto_SHA256_Final((*C.uint8_t)(unsafe.Pointer(&h.out[0])), &h.ctx) == 0 {
if C._goboringcrypto_SHA256_Final((*C.uint8_t)(noescape(unsafe.Pointer(&h.out[0]))), h.noescapeCtx()) == 0 {
panic("boringcrypto: SHA256_Final failed")
}
return h.out[:]
return append(dst, h.out[:]...)
}
const (
@ -271,24 +380,30 @@ type sha384Hash struct {
out [384 / 8]byte
}
func (h *sha384Hash) Reset() { C._goboringcrypto_SHA384_Init(&h.ctx) }
func (h *sha384Hash) Size() int { return 384 / 8 }
func (h *sha384Hash) BlockSize() int { return 128 }
func (h *sha384Hash) Sum(in []byte) []byte { return append(in, h.sum()...) }
func (h *sha384Hash) noescapeCtx() *C.GO_SHA512_CTX {
return (*C.GO_SHA512_CTX)(noescape(unsafe.Pointer(&h.ctx)))
}
func (h *sha384Hash) Reset() {
C._goboringcrypto_SHA384_Init(h.noescapeCtx())
}
func (h *sha384Hash) Size() int { return 384 / 8 }
func (h *sha384Hash) BlockSize() int { return 128 }
func (h *sha384Hash) Sum(dst []byte) []byte { return h.sum(dst) }
func (h *sha384Hash) Write(p []byte) (int, error) {
if len(p) > 0 && C._goboringcrypto_SHA384_Update(&h.ctx, unsafe.Pointer(&p[0]), C.size_t(len(p))) == 0 {
if len(p) > 0 && C._goboringcrypto_SHA384_Update(h.noescapeCtx(), noescape(addr(p)), C.size_t(len(p))) == 0 {
panic("boringcrypto: SHA384_Update failed")
}
return len(p), nil
}
func (h0 *sha384Hash) sum() []byte {
func (h0 *sha384Hash) sum(dst []byte) []byte {
h := *h0 // make copy so future Write+Sum is valid
if C._goboringcrypto_SHA384_Final((*C.uint8_t)(unsafe.Pointer(&h.out[0])), &h.ctx) == 0 {
if C._goboringcrypto_SHA384_Final((*C.uint8_t)(noescape(unsafe.Pointer(&h.out[0]))), h.noescapeCtx()) == 0 {
panic("boringcrypto: SHA384_Final failed")
}
return h.out[:]
return append(dst, h.out[:]...)
}
// NewSHA512 returns a new SHA512 hash.
@ -303,24 +418,30 @@ type sha512Hash struct {
out [512 / 8]byte
}
func (h *sha512Hash) Reset() { C._goboringcrypto_SHA512_Init(&h.ctx) }
func (h *sha512Hash) Size() int { return 512 / 8 }
func (h *sha512Hash) BlockSize() int { return 128 }
func (h *sha512Hash) Sum(in []byte) []byte { return append(in, h.sum()...) }
func (h *sha512Hash) noescapeCtx() *C.GO_SHA512_CTX {
return (*C.GO_SHA512_CTX)(noescape(unsafe.Pointer(&h.ctx)))
}
func (h *sha512Hash) Reset() {
C._goboringcrypto_SHA512_Init(h.noescapeCtx())
}
func (h *sha512Hash) Size() int { return 512 / 8 }
func (h *sha512Hash) BlockSize() int { return 128 }
func (h *sha512Hash) Sum(dst []byte) []byte { return h.sum(dst) }
func (h *sha512Hash) Write(p []byte) (int, error) {
if len(p) > 0 && C._goboringcrypto_SHA512_Update(&h.ctx, unsafe.Pointer(&p[0]), C.size_t(len(p))) == 0 {
if len(p) > 0 && C._goboringcrypto_SHA512_Update(h.noescapeCtx(), noescape(addr(p)), C.size_t(len(p))) == 0 {
panic("boringcrypto: SHA512_Update failed")
}
return len(p), nil
}
func (h0 *sha512Hash) sum() []byte {
func (h0 *sha512Hash) sum(dst []byte) []byte {
h := *h0 // make copy so future Write+Sum is valid
if C._goboringcrypto_SHA512_Final((*C.uint8_t)(unsafe.Pointer(&h.out[0])), &h.ctx) == 0 {
if C._goboringcrypto_SHA512_Final((*C.uint8_t)(noescape(unsafe.Pointer(&h.out[0]))), h.noescapeCtx()) == 0 {
panic("boringcrypto: SHA512_Final failed")
}
return h.out[:]
return append(dst, h.out[:]...)
}
type sha512Ctx struct {
@ -338,8 +459,6 @@ const (
marshaledSize512 = len(magic512) + 8*8 + 128 + 8
)
var zero [128]byte
func (h *sha384Hash) MarshalBinary() ([]byte, error) {
d := (*sha512Ctx)(unsafe.Pointer(&h.ctx))
b := make([]byte, 0, marshaledSize512)

6
src/crypto/sha1/boring.go
View File

@ -6,8 +6,8 @@
// cmd/internal/boring is not even imported, so that we don't
// have to maintain changes to cmd/dist's deps graph.
//go:build !cmd_go_bootstrap
// +build !cmd_go_bootstrap
//go:build !cmd_go_bootstrap && cgo
// +build !cmd_go_bootstrap,cgo
package sha1
@ -21,3 +21,5 @@ const boringEnabled = boring.Enabled
func boringNewSHA1() hash.Hash { return boring.NewSHA1() }
func boringUnreachable() { boring.Unreachable() }
func boringSHA1(p []byte) [20]byte { return boring.SHA1(p) }

6
src/crypto/sha1/notboring.go
View File

@ -2,8 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build cmd_go_bootstrap
// +build cmd_go_bootstrap
//go:build cmd_go_bootstrap || !cgo
// +build cmd_go_bootstrap !cgo
package sha1
@ -16,3 +16,5 @@ const boringEnabled = false
func boringNewSHA1() hash.Hash { panic("boringcrypto: not available") }
func boringUnreachable() {}
func boringSHA1([]byte) [20]byte { panic("boringcrypto: not available") }

6
src/crypto/sha1/sha1.go
View File

@ -265,11 +265,7 @@ func (d *digest) constSum() [Size]byte {
// Sum returns the SHA-1 checksum of the data.
func Sum(data []byte) [Size]byte {
if boringEnabled {
h := New()
h.Write(data)
var ret [Size]byte
h.Sum(ret[:0])
return ret
return boringSHA1(data)
}
var d digest
d.Reset()

25
src/crypto/sha1/sha1_test.go
View File

@ -8,6 +8,7 @@ package sha1
import (
"bytes"
"crypto/internal/boring"
"crypto/rand"
"encoding"
"fmt"
@ -16,8 +17,6 @@ import (
"testing"
)
import "crypto/internal/boring"
type sha1Test struct {
out string
in string
@ -239,13 +238,23 @@ var bench = New()
var buf = make([]byte, 8192)
func benchmarkSize(b *testing.B, size int) {
b.SetBytes(int64(size))
sum := make([]byte, bench.Size())
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
b.Run("New", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
})
b.Run("Sum", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
Sum(buf[:size])
}
})
}
func BenchmarkHash8Bytes(b *testing.B) {

15
src/crypto/sha256/sha256.go
View File

@ -8,13 +8,12 @@ package sha256
import (
"crypto"
"crypto/internal/boring"
"encoding/binary"
"errors"
"hash"
)
import "crypto/internal/boring"
func init() {
crypto.RegisterHash(crypto.SHA224, New224)
crypto.RegisterHash(crypto.SHA256, New)
@ -263,11 +262,7 @@ func (d *digest) checkSum() [Size]byte {
// Sum256 returns the SHA256 checksum of the data.
func Sum256(data []byte) [Size]byte {
if boring.Enabled {
h := New()
h.Write(data)
var ret [Size]byte
h.Sum(ret[:0])
return ret
return boring.SHA256(data)
}
var d digest
d.Reset()
@ -278,11 +273,7 @@ func Sum256(data []byte) [Size]byte {
// Sum224 returns the SHA224 checksum of the data.
func Sum224(data []byte) [Size224]byte {
if boring.Enabled {
h := New224()
h.Write(data)
var ret [Size224]byte
h.Sum(ret[:0])
return ret
return boring.SHA224(data)
}
var d digest
d.is224 = true

32
src/crypto/sha256/sha256_test.go
View File

@ -8,6 +8,7 @@ package sha256
import (
"bytes"
"crypto/internal/boring"
"crypto/rand"
"encoding"
"fmt"
@ -16,8 +17,6 @@ import (
"testing"
)
import "crypto/internal/boring"
type sha256Test struct {
out string
in string
@ -315,13 +314,30 @@ var bench = New()
var buf = make([]byte, 8192)
func benchmarkSize(b *testing.B, size int) {
b.SetBytes(int64(size))
sum := make([]byte, bench.Size())
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
b.Run("New", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
})
b.Run("Sum224", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
Sum224(buf[:size])
}
})
b.Run("Sum256", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
Sum256(buf[:size])
}
})
}
func BenchmarkHash8Bytes(b *testing.B) {

15
src/crypto/sha512/sha512.go
View File

@ -12,13 +12,12 @@ package sha512
import (
"crypto"
"crypto/internal/boring"
"encoding/binary"
"errors"
"hash"
)
import "crypto/internal/boring"
func init() {
crypto.RegisterHash(crypto.SHA384, New384)
crypto.RegisterHash(crypto.SHA512, New)
@ -345,11 +344,7 @@ func (d *digest) checkSum() [Size]byte {
// Sum512 returns the SHA512 checksum of the data.
func Sum512(data []byte) [Size]byte {
if boring.Enabled {
h := New()
h.Write(data)
var ret [Size]byte
h.Sum(ret[:0])
return ret
return boring.SHA512(data)
}
d := digest{function: crypto.SHA512}
d.Reset()
@ -360,11 +355,7 @@ func Sum512(data []byte) [Size]byte {
// Sum384 returns the SHA384 checksum of the data.
func Sum384(data []byte) [Size384]byte {
if boring.Enabled {
h := New384()
h.Write(data)
var ret [Size384]byte
h.Sum(ret[:0])
return ret
return boring.SHA384(data)
}
d := digest{function: crypto.SHA384}
d.Reset()

32
src/crypto/sha512/sha512_test.go
View File

@ -8,6 +8,7 @@ package sha512
import (
"bytes"
"crypto/internal/boring"
"crypto/rand"
"encoding"
"encoding/hex"
@ -17,8 +18,6 @@ import (
"testing"
)
import "crypto/internal/boring"
type sha512Test struct {
out string
in string
@ -914,13 +913,30 @@ var bench = New()
var buf = make([]byte, 8192)
func benchmarkSize(b *testing.B, size int) {
b.SetBytes(int64(size))
sum := make([]byte, bench.Size())
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
b.Run("New", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
bench.Reset()
bench.Write(buf[:size])
bench.Sum(sum[:0])
}
})
b.Run("Sum384", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
Sum384(buf[:size])
}
})
b.Run("Sum512", func(b *testing.B) {
b.ReportAllocs()
b.SetBytes(int64(size))
for i := 0; i < b.N; i++ {
Sum512(buf[:size])
}
})
}
func BenchmarkHash8Bytes(b *testing.B) {