Experimental: allow analysis of xorIn inside Write to prevent heap escape of parameter p
This commit is contained in:
parent
dde79576dc
commit
04fe7dc643
29
sha3_test.go
29
sha3_test.go
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@ -32,12 +32,16 @@ const (
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// with output-length equal to the KAT length for SHA-3, Keccak
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// and SHAKE instances.
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var testDigests = map[string]func() hash.Hash{
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"SHA3-224": New224,
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"SHA3-256": New256,
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"SHA3-384": New384,
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"SHA3-512": New512,
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"Keccak-256": NewLegacyKeccak256,
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"Keccak-512": NewLegacyKeccak512,
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"SHA3-224": New224,
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"SHA3-256": New256,
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"SHA3-384": New384,
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"SHA3-512": New512,
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"Keccak-256": func() hash.Hash {
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return NewLegacyKeccak256()
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},
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"Keccak-512": func() hash.Hash {
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return NewLegacyKeccak512()
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},
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}
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// testShakes contains functions that return sha3.ShakeHash instances for
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@ -77,14 +81,15 @@ type KeccakKats struct {
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}
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func testUnalignedAndGeneric(t *testing.T, testf func(impl string)) {
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xorInOrig, copyOutOrig := xorIn, copyOut
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testf("generic")
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/*xorInOrig, copyOutOrig := xorIn, copyOut
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xorIn, copyOut = xorInGeneric, copyOutGeneric
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testf("generic")
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if xorImplementationUnaligned != "generic" {
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xorIn, copyOut = xorInUnaligned, copyOutUnaligned
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testf("unaligned")
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}
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xorIn, copyOut = xorInOrig, copyOutOrig
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xorIn, copyOut = xorInOrig, copyOutOrig*/
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}
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// TestKeccakKats tests the SHA-3 and Shake implementations against all the
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@ -166,12 +171,16 @@ func TestKeccak(t *testing.T) {
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want string
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}{
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{
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NewLegacyKeccak256,
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func() hash.Hash {
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return NewLegacyKeccak256()
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},
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[]byte("abc"),
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"4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45",
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},
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{
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NewLegacyKeccak512,
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func() hash.Hash {
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return NewLegacyKeccak512()
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},
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[]byte("abc"),
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"18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96",
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},
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5
xor.go
5
xor.go
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@ -14,8 +14,11 @@ func (b *storageBuf) asBytes() *[maxRate]byte {
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return (*[maxRate]byte)(b)
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}
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func xorIn(d *HasherState, buf []byte) {
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xorInGeneric(d, buf)
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}
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var (
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xorIn = xorInGeneric
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copyOut = copyOutGeneric
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xorInUnaligned = xorInGeneric
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copyOutUnaligned = copyOutGeneric
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@ -8,7 +8,10 @@
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package sha3
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import "unsafe"
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import (
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"encoding/binary"
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"unsafe"
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)
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// A storageBuf is an aligned array of maxRate bytes.
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type storageBuf [maxRate / 8]uint64
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@ -21,37 +24,36 @@ func (b *storageBuf) asBytes() *[maxRate]byte {
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// XOR buf.
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func xorInUnaligned(d *HasherState, buf []byte) {
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n := len(buf)
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bw := (*[maxRate / 8]uint64)(unsafe.Pointer(&buf[0]))[: n/8 : n/8]
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if n >= 72 {
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d.a[0] ^= bw[0]
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d.a[1] ^= bw[1]
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d.a[2] ^= bw[2]
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d.a[3] ^= bw[3]
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d.a[4] ^= bw[4]
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d.a[5] ^= bw[5]
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d.a[6] ^= bw[6]
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d.a[7] ^= bw[7]
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d.a[8] ^= bw[8]
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d.a[0] ^= binary.LittleEndian.Uint64(buf[8*0:])
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d.a[1] ^= binary.LittleEndian.Uint64(buf[8*1:])
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d.a[2] ^= binary.LittleEndian.Uint64(buf[8*2:])
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d.a[3] ^= binary.LittleEndian.Uint64(buf[8*3:])
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d.a[4] ^= binary.LittleEndian.Uint64(buf[8*4:])
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d.a[5] ^= binary.LittleEndian.Uint64(buf[8*5:])
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d.a[6] ^= binary.LittleEndian.Uint64(buf[8*6:])
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d.a[7] ^= binary.LittleEndian.Uint64(buf[8*7:])
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d.a[8] ^= binary.LittleEndian.Uint64(buf[8*8:])
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}
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if n >= 104 {
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d.a[9] ^= bw[9]
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d.a[10] ^= bw[10]
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d.a[11] ^= bw[11]
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d.a[12] ^= bw[12]
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d.a[9] ^= binary.LittleEndian.Uint64(buf[8*9:])
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d.a[10] ^= binary.LittleEndian.Uint64(buf[8*10:])
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d.a[11] ^= binary.LittleEndian.Uint64(buf[8*11:])
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d.a[12] ^= binary.LittleEndian.Uint64(buf[8*12:])
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}
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if n >= 136 {
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d.a[13] ^= bw[13]
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d.a[14] ^= bw[14]
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d.a[15] ^= bw[15]
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d.a[16] ^= bw[16]
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d.a[13] ^= binary.LittleEndian.Uint64(buf[8*13:])
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d.a[14] ^= binary.LittleEndian.Uint64(buf[8*14:])
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d.a[15] ^= binary.LittleEndian.Uint64(buf[8*15:])
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d.a[16] ^= binary.LittleEndian.Uint64(buf[8*16:])
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}
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if n >= 144 {
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d.a[17] ^= bw[17]
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d.a[17] ^= binary.LittleEndian.Uint64(buf[8*17:])
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}
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if n >= 168 {
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d.a[18] ^= bw[18]
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d.a[19] ^= bw[19]
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d.a[20] ^= bw[20]
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d.a[18] ^= binary.LittleEndian.Uint64(buf[8*18:])
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d.a[19] ^= binary.LittleEndian.Uint64(buf[8*19:])
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d.a[20] ^= binary.LittleEndian.Uint64(buf[8*20:])
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}
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}
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@ -60,8 +62,11 @@ func copyOutUnaligned(d *HasherState, buf []byte) {
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copy(buf, ab[:])
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}
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func xorIn(d *HasherState, buf []byte) {
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xorInUnaligned(d, buf)
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}
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var (
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xorIn = xorInUnaligned
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copyOut = copyOutUnaligned
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)
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