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vendor: add golang.org/x/crypto/{chacha20poly1305,poly1305}

Browse Source 
This change imports the chacha20poly1305 and poly1305 packages from
x/crypto at 5f4e837b98443e9e7a65072235205993af565d85. These packages
will be used to support the ChaCha20-Poly1305 AEAD in crypto/tls.

Change-Id: I1a38d671ef9aeff3bc41e3924655883d465a5617
Reviewed-on: https://go-review.googlesource.com/30956
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Adam Langley 2016-10-12 10:18:37 -07:00
parent 9a97c3bfe4
commit 77b6a08e0d
16 changed files with 5915 additions and 0 deletions
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83
src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package chacha20poly1305 implements the ChaCha20-Poly1305 AEAD as specified in RFC 7539.
package chacha20poly1305
import (
"crypto/cipher"
"errors"
)
const (
// KeySize is the size of the key used by this AEAD, in bytes.
KeySize = 32
// NonceSize is the size of the nonce used with this AEAD, in bytes.
NonceSize = 12
)
type chacha20poly1305 struct {
key [32]byte
}
// New returns a ChaCha20-Poly1305 AEAD that uses the given, 256-bit key.
func New(key []byte) (cipher.AEAD, error) {
if len(key) != KeySize {
return nil, errors.New("chacha20poly1305: bad key length")
}
ret := new(chacha20poly1305)
copy(ret.key[:], key)
return ret, nil
}
func (c *chacha20poly1305) NonceSize() int {
return NonceSize
}
func (c *chacha20poly1305) Overhead() int {
return 16
}
func (c *chacha20poly1305) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
if len(nonce) != NonceSize {
panic("chacha20poly1305: bad nonce length passed to Seal")
}
if uint64(len(plaintext)) > (1<<38)-64 {
panic("chacha20poly1305: plaintext too large")
}
return c.seal(dst, nonce, plaintext, additionalData)
}
var errOpen = errors.New("chacha20poly1305: message authentication failed")
func (c *chacha20poly1305) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
if len(nonce) != NonceSize {
panic("chacha20poly1305: bad nonce length passed to Open")
}
if len(ciphertext) < 16 {
return nil, errOpen
}
if uint64(len(ciphertext)) > (1<<38)-48 {
panic("chacha20poly1305: ciphertext too large")
}
return c.open(dst, nonce, ciphertext, additionalData)
}
// sliceForAppend takes a slice and a requested number of bytes. It returns a
// slice with the contents of the given slice followed by that many bytes and a
// second slice that aliases into it and contains only the extra bytes. If the
// original slice has sufficient capacity then no allocation is performed.
func sliceForAppend(in []byte, n int) (head, tail []byte) {
if total := len(in) + n; cap(in) >= total {
head = in[:total]
} else {
head = make([]byte, total)
copy(head, in)
}
tail = head[len(in):]
return
}

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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,go1.7
package chacha20poly1305
import "encoding/binary"
//go:noescape
func chacha20Poly1305Open(dst []byte, key []uint32, src, ad []byte) bool
//go:noescape
func chacha20Poly1305Seal(dst []byte, key []uint32, src, ad []byte)
//go:noescape
func haveSSSE3() bool
var canUseASM bool
func init() {
canUseASM = haveSSSE3()
}
// setupState writes a ChaCha20 input matrix to state. See
// https://tools.ietf.org/html/rfc7539#section-2.3.
func setupState(state *[16]uint32, key *[32]byte, nonce []byte) {
state[0] = 0x61707865
state[1] = 0x3320646e
state[2] = 0x79622d32
state[3] = 0x6b206574
state[4] = binary.LittleEndian.Uint32(key[:4])
state[5] = binary.LittleEndian.Uint32(key[4:8])
state[6] = binary.LittleEndian.Uint32(key[8:12])
state[7] = binary.LittleEndian.Uint32(key[12:16])
state[8] = binary.LittleEndian.Uint32(key[16:20])
state[9] = binary.LittleEndian.Uint32(key[20:24])
state[10] = binary.LittleEndian.Uint32(key[24:28])
state[11] = binary.LittleEndian.Uint32(key[28:32])
state[12] = 0
state[13] = binary.LittleEndian.Uint32(nonce[:4])
state[14] = binary.LittleEndian.Uint32(nonce[4:8])
state[15] = binary.LittleEndian.Uint32(nonce[8:12])
}
func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte {
if !canUseASM {
return c.sealGeneric(dst, nonce, plaintext, additionalData)
}
var state [16]uint32
setupState(&state, &c.key, nonce)
ret, out := sliceForAppend(dst, len(plaintext)+16)
chacha20Poly1305Seal(out[:], state[:], plaintext, additionalData)
return ret
}
func (c *chacha20poly1305) open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
if !canUseASM {
return c.openGeneric(dst, nonce, ciphertext, additionalData)
}
var state [16]uint32
setupState(&state, &c.key, nonce)
ciphertext = ciphertext[:len(ciphertext)-16]
ret, out := sliceForAppend(dst, len(ciphertext))
if !chacha20Poly1305Open(out, state[:], ciphertext, additionalData) {
for i := range out {
out[i] = 0
}
return nil, errOpen
}
return ret, nil
}

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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.s vendored Normal file
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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_generic.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package chacha20poly1305
import (
"encoding/binary"
"golang_org/x/crypto/chacha20poly1305/internal/chacha20"
"golang_org/x/crypto/poly1305"
)
func roundTo16(n int) int {
return 16 * ((n + 15) / 16)
}
func (c *chacha20poly1305) sealGeneric(dst, nonce, plaintext, additionalData []byte) []byte {
var counter [16]byte
copy(counter[4:], nonce)
var polyKey [32]byte
chacha20.XORKeyStream(polyKey[:], polyKey[:], &counter, &c.key)
ret, out := sliceForAppend(dst, len(plaintext)+poly1305.TagSize)
counter[0] = 1
chacha20.XORKeyStream(out, plaintext, &counter, &c.key)
polyInput := make([]byte, roundTo16(len(additionalData))+roundTo16(len(plaintext))+8+8)
copy(polyInput, additionalData)
copy(polyInput[roundTo16(len(additionalData)):], out[:len(plaintext)])
binary.LittleEndian.PutUint64(polyInput[len(polyInput)-16:], uint64(len(additionalData)))
binary.LittleEndian.PutUint64(polyInput[len(polyInput)-8:], uint64(len(plaintext)))
var tag [poly1305.TagSize]byte
poly1305.Sum(&tag, polyInput, &polyKey)
copy(out[len(plaintext):], tag[:])
return ret
}
func (c *chacha20poly1305) openGeneric(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
var tag [poly1305.TagSize]byte
copy(tag[:], ciphertext[len(ciphertext)-16:])
ciphertext = ciphertext[:len(ciphertext)-16]
var counter [16]byte
copy(counter[4:], nonce)
var polyKey [32]byte
chacha20.XORKeyStream(polyKey[:], polyKey[:], &counter, &c.key)
polyInput := make([]byte, roundTo16(len(additionalData))+roundTo16(len(ciphertext))+8+8)
copy(polyInput, additionalData)
copy(polyInput[roundTo16(len(additionalData)):], ciphertext)
binary.LittleEndian.PutUint64(polyInput[len(polyInput)-16:], uint64(len(additionalData)))
binary.LittleEndian.PutUint64(polyInput[len(polyInput)-8:], uint64(len(ciphertext)))
ret, out := sliceForAppend(dst, len(ciphertext))
if !poly1305.Verify(&tag, polyInput, &polyKey) {
for i := range out {
out[i] = 0
}
return nil, errOpen
}
counter[0] = 1
chacha20.XORKeyStream(out, ciphertext, &counter, &c.key)
return ret, nil
}

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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_noasm.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !amd64 !go1.7
package chacha20poly1305
func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte {
return c.sealGeneric(dst, nonce, plaintext, additionalData)
}
func (c *chacha20poly1305) open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
return c.openGeneric(dst, nonce, ciphertext, additionalData)
}

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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_test.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package chacha20poly1305
import (
"bytes"
cr "crypto/rand"
"encoding/hex"
mr "math/rand"
"testing"
)
func TestVectors(t *testing.T) {
for i, test := range chacha20Poly1305Tests {
key, _ := hex.DecodeString(test.key)
nonce, _ := hex.DecodeString(test.nonce)
ad, _ := hex.DecodeString(test.aad)
plaintext, _ := hex.DecodeString(test.plaintext)
aead, err := New(key)
if err != nil {
t.Fatal(err)
}
ct := aead.Seal(nil, nonce, plaintext, ad)
if ctHex := hex.EncodeToString(ct); ctHex != test.out {
t.Errorf("#%d: got %s, want %s", i, ctHex, test.out)
continue
}
plaintext2, err := aead.Open(nil, nonce, ct, ad)
if err != nil {
t.Errorf("#%d: Open failed", i)
continue
}
if !bytes.Equal(plaintext, plaintext2) {
t.Errorf("#%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
continue
}
if len(ad) > 0 {
alterAdIdx := mr.Intn(len(ad))
ad[alterAdIdx] ^= 0x80
if _, err := aead.Open(nil, nonce, ct, ad); err == nil {
t.Errorf("#%d: Open was successful after altering additional data", i)
}
ad[alterAdIdx] ^= 0x80
}
alterNonceIdx := mr.Intn(aead.NonceSize())
nonce[alterNonceIdx] ^= 0x80
if _, err := aead.Open(nil, nonce, ct, ad); err == nil {
t.Errorf("#%d: Open was successful after altering nonce", i)
}
nonce[alterNonceIdx] ^= 0x80
alterCtIdx := mr.Intn(len(ct))
ct[alterCtIdx] ^= 0x80
if _, err := aead.Open(nil, nonce, ct, ad); err == nil {
t.Errorf("#%d: Open was successful after altering ciphertext", i)
}
ct[alterCtIdx] ^= 0x80
}
}
func TestRandom(t *testing.T) {
// Some random tests to verify Open(Seal) == Plaintext
for i := 0; i < 256; i++ {
var nonce [12]byte
var key [32]byte
al := mr.Intn(128)
pl := mr.Intn(16384)
ad := make([]byte, al)
plaintext := make([]byte, pl)
cr.Read(key[:])
cr.Read(nonce[:])
cr.Read(ad)
cr.Read(plaintext)
aead, err := New(key[:])
if err != nil {
t.Fatal(err)
}
ct := aead.Seal(nil, nonce[:], plaintext, ad)
plaintext2, err := aead.Open(nil, nonce[:], ct, ad)
if err != nil {
t.Errorf("Random #%d: Open failed", i)
continue
}
if !bytes.Equal(plaintext, plaintext2) {
t.Errorf("Random #%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
continue
}
if len(ad) > 0 {
alterAdIdx := mr.Intn(len(ad))
ad[alterAdIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering additional data", i)
}
ad[alterAdIdx] ^= 0x80
}
alterNonceIdx := mr.Intn(aead.NonceSize())
nonce[alterNonceIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering nonce", i)
}
nonce[alterNonceIdx] ^= 0x80
alterCtIdx := mr.Intn(len(ct))
ct[alterCtIdx] ^= 0x80
if _, err := aead.Open(nil, nonce[:], ct, ad); err == nil {
t.Errorf("Random #%d: Open was successful after altering ciphertext", i)
}
ct[alterCtIdx] ^= 0x80
}
}
func benchamarkChaCha20Poly1305Seal(b *testing.B, buf []byte) {
b.SetBytes(int64(len(buf)))
var key [32]byte
var nonce [12]byte
var ad [13]byte
var out []byte
aead, _ := New(key[:])
b.ResetTimer()
for i := 0; i < b.N; i++ {
out = aead.Seal(out[:0], nonce[:], buf[:], ad[:])
}
}
func benchamarkChaCha20Poly1305Open(b *testing.B, buf []byte) {
b.SetBytes(int64(len(buf)))
var key [32]byte
var nonce [12]byte
var ad [13]byte
var ct []byte
var out []byte
aead, _ := New(key[:])
ct = aead.Seal(ct[:0], nonce[:], buf[:], ad[:])
b.ResetTimer()
for i := 0; i < b.N; i++ {
out, _ = aead.Open(out[:0], nonce[:], ct[:], ad[:])
}
}
func BenchmarkChacha20Poly1305Open_64(b *testing.B) {
benchamarkChaCha20Poly1305Open(b, make([]byte, 64))
}
func BenchmarkChacha20Poly1305Seal_64(b *testing.B) {
benchamarkChaCha20Poly1305Seal(b, make([]byte, 64))
}
func BenchmarkChacha20Poly1305Open_1350(b *testing.B) {
benchamarkChaCha20Poly1305Open(b, make([]byte, 1350))
}
func BenchmarkChacha20Poly1305Seal_1350(b *testing.B) {
benchamarkChaCha20Poly1305Seal(b, make([]byte, 1350))
}
func BenchmarkChacha20Poly1305Open_8K(b *testing.B) {
benchamarkChaCha20Poly1305Open(b, make([]byte, 8*1024))
}
func BenchmarkChacha20Poly1305Seal_8K(b *testing.B) {
benchamarkChaCha20Poly1305Seal(b, make([]byte, 8*1024))
}

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src/vendor/golang_org/x/crypto/chacha20poly1305/chacha20poly1305_test_vectors.go vendored Normal file
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src/vendor/golang_org/x/crypto/chacha20poly1305/internal/chacha20/chacha_generic.go vendored Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package ChaCha20 implements the core ChaCha20 function as specified in https://tools.ietf.org/html/rfc7539#section-2.3.
package chacha20
import "encoding/binary"
const rounds = 20
// core applies the ChaCha20 core function to 16-byte input in, 32-byte key k,
// and 16-byte constant c, and puts the result into 64-byte array out.
func core(out *[64]byte, in *[16]byte, k *[32]byte) {
j0 := uint32(0x61707865)
j1 := uint32(0x3320646e)
j2 := uint32(0x79622d32)
j3 := uint32(0x6b206574)
j4 := binary.LittleEndian.Uint32(k[0:4])
j5 := binary.LittleEndian.Uint32(k[4:8])
j6 := binary.LittleEndian.Uint32(k[8:12])
j7 := binary.LittleEndian.Uint32(k[12:16])
j8 := binary.LittleEndian.Uint32(k[16:20])
j9 := binary.LittleEndian.Uint32(k[20:24])
j10 := binary.LittleEndian.Uint32(k[24:28])
j11 := binary.LittleEndian.Uint32(k[28:32])
j12 := binary.LittleEndian.Uint32(in[0:4])
j13 := binary.LittleEndian.Uint32(in[4:8])
j14 := binary.LittleEndian.Uint32(in[8:12])
j15 := binary.LittleEndian.Uint32(in[12:16])
x0, x1, x2, x3, x4, x5, x6, x7 := j0, j1, j2, j3, j4, j5, j6, j7
x8, x9, x10, x11, x12, x13, x14, x15 := j8, j9, j10, j11, j12, j13, j14, j15
for i := 0; i < rounds; i += 2 {
x0 += x4
x12 ^= x0
x12 = (x12 << 16) | (x12 >> (16))
x8 += x12
x4 ^= x8
x4 = (x4 << 12) | (x4 >> (20))
x0 += x4
x12 ^= x0
x12 = (x12 << 8) | (x12 >> (24))
x8 += x12
x4 ^= x8
x4 = (x4 << 7) | (x4 >> (25))
x1 += x5
x13 ^= x1
x13 = (x13 << 16) | (x13 >> 16)
x9 += x13
x5 ^= x9
x5 = (x5 << 12) | (x5 >> 20)
x1 += x5
x13 ^= x1
x13 = (x13 << 8) | (x13 >> 24)
x9 += x13
x5 ^= x9
x5 = (x5 << 7) | (x5 >> 25)
x2 += x6
x14 ^= x2
x14 = (x14 << 16) | (x14 >> 16)
x10 += x14
x6 ^= x10
x6 = (x6 << 12) | (x6 >> 20)
x2 += x6
x14 ^= x2
x14 = (x14 << 8) | (x14 >> 24)
x10 += x14
x6 ^= x10
x6 = (x6 << 7) | (x6 >> 25)
x3 += x7
x15 ^= x3
x15 = (x15 << 16) | (x15 >> 16)
x11 += x15
x7 ^= x11
x7 = (x7 << 12) | (x7 >> 20)
x3 += x7
x15 ^= x3
x15 = (x15 << 8) | (x15 >> 24)
x11 += x15
x7 ^= x11
x7 = (x7 << 7) | (x7 >> 25)
x0 += x5
x15 ^= x0
x15 = (x15 << 16) | (x15 >> 16)
x10 += x15
x5 ^= x10
x5 = (x5 << 12) | (x5 >> 20)
x0 += x5
x15 ^= x0
x15 = (x15 << 8) | (x15 >> 24)
x10 += x15
x5 ^= x10
x5 = (x5 << 7) | (x5 >> 25)
x1 += x6
x12 ^= x1
x12 = (x12 << 16) | (x12 >> 16)
x11 += x12
x6 ^= x11
x6 = (x6 << 12) | (x6 >> 20)
x1 += x6
x12 ^= x1
x12 = (x12 << 8) | (x12 >> 24)
x11 += x12
x6 ^= x11
x6 = (x6 << 7) | (x6 >> 25)
x2 += x7
x13 ^= x2
x13 = (x13 << 16) | (x13 >> 16)
x8 += x13
x7 ^= x8
x7 = (x7 << 12) | (x7 >> 20)
x2 += x7
x13 ^= x2
x13 = (x13 << 8) | (x13 >> 24)
x8 += x13
x7 ^= x8
x7 = (x7 << 7) | (x7 >> 25)
x3 += x4
x14 ^= x3
x14 = (x14 << 16) | (x14 >> 16)
x9 += x14
x4 ^= x9
x4 = (x4 << 12) | (x4 >> 20)
x3 += x4
x14 ^= x3
x14 = (x14 << 8) | (x14 >> 24)
x9 += x14
x4 ^= x9
x4 = (x4 << 7) | (x4 >> 25)
}
x0 += j0
x1 += j1
x2 += j2
x3 += j3
x4 += j4
x5 += j5
x6 += j6
x7 += j7
x8 += j8
x9 += j9
x10 += j10
x11 += j11
x12 += j12
x13 += j13
x14 += j14
x15 += j15
binary.LittleEndian.PutUint32(out[0:4], x0)
binary.LittleEndian.PutUint32(out[4:8], x1)
binary.LittleEndian.PutUint32(out[8:12], x2)
binary.LittleEndian.PutUint32(out[12:16], x3)
binary.LittleEndian.PutUint32(out[16:20], x4)
binary.LittleEndian.PutUint32(out[20:24], x5)
binary.LittleEndian.PutUint32(out[24:28], x6)
binary.LittleEndian.PutUint32(out[28:32], x7)
binary.LittleEndian.PutUint32(out[32:36], x8)
binary.LittleEndian.PutUint32(out[36:40], x9)
binary.LittleEndian.PutUint32(out[40:44], x10)
binary.LittleEndian.PutUint32(out[44:48], x11)
binary.LittleEndian.PutUint32(out[48:52], x12)
binary.LittleEndian.PutUint32(out[52:56], x13)
binary.LittleEndian.PutUint32(out[56:60], x14)
binary.LittleEndian.PutUint32(out[60:64], x15)
}
// XORKeyStream crypts bytes from in to out using the given key and counters.
// In and out may be the same slice but otherwise should not overlap. Counter
// contains the raw ChaCha20 counter bytes (i.e. block counter followed by
// nonce).
func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
var block [64]byte
var counterCopy [16]byte
copy(counterCopy[:], counter[:])
for len(in) >= 64 {
core(&block, &counterCopy, key)
for i, x := range block {
out[i] = in[i] ^ x
}
u := uint32(1)
for i := 0; i < 4; i++ {
u += uint32(counterCopy[i])
counterCopy[i] = byte(u)
u >>= 8
}
in = in[64:]
out = out[64:]
}
if len(in) > 0 {
core(&block, &counterCopy, key)
for i, v := range in {
out[i] = v ^ block[i]
}
}
}

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package chacha20
import (
"encoding/hex"
"testing"
)
func TestCore(t *testing.T) {
// This is just a smoke test that checks the example from
// https://tools.ietf.org/html/rfc7539#section-2.3.2. The
// chacha20poly1305 package contains much more extensive tests of this
// code.
var key [32]byte
for i := range key {
key[i] = byte(i)
}
var input [16]byte
input[0] = 1
input[7] = 9
input[11] = 0x4a
var out [64]byte
XORKeyStream(out[:], out[:], &input, &key)
const expected = "10f1e7e4d13b5915500fdd1fa32071c4c7d1f4c733c068030422aa9ac3d46c4ed2826446079faa0914c2d705d98b02a2b5129cd1de164eb9cbd083e8a2503c4e"
if result := hex.EncodeToString(out[:]); result != expected {
t.Errorf("wanted %x but got %x", expected, result)
}
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Package poly1305 implements Poly1305 one-time message authentication code as specified in http://cr.yp.to/mac/poly1305-20050329.pdf.
Poly1305 is a fast, one-time authentication function. It is infeasible for an
attacker to generate an authenticator for a message without the key. However, a
key must only be used for a single message. Authenticating two different
messages with the same key allows an attacker to forge authenticators for other
messages with the same key.
Poly1305 was originally coupled with AES in order to make Poly1305-AES. AES was
used with a fixed key in order to generate one-time keys from an nonce.
However, in this package AES isn't used and the one-time key is specified
directly.
*/
package poly1305 // import "golang.org/x/crypto/poly1305"
import "crypto/subtle"
// TagSize is the size, in bytes, of a poly1305 authenticator.
const TagSize = 16
// Verify returns true if mac is a valid authenticator for m with the given
// key.
func Verify(mac *[16]byte, m []byte, key *[32]byte) bool {
var tmp [16]byte
Sum(&tmp, m, key)
return subtle.ConstantTimeCompare(tmp[:], mac[:]) == 1
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package poly1305
import (
"bytes"
"testing"
"unsafe"
)
var testData = []struct {
in, k, correct []byte
}{
{
[]byte("Hello world!"),
[]byte("this is 32-byte key for Poly1305"),
[]byte{0xa6, 0xf7, 0x45, 0x00, 0x8f, 0x81, 0xc9, 0x16, 0xa2, 0x0d, 0xcc, 0x74, 0xee, 0xf2, 0xb2, 0xf0},
},
{
make([]byte, 32),
[]byte("this is 32-byte key for Poly1305"),
[]byte{0x49, 0xec, 0x78, 0x09, 0x0e, 0x48, 0x1e, 0xc6, 0xc2, 0x6b, 0x33, 0xb9, 0x1c, 0xcc, 0x03, 0x07},
},
{
make([]byte, 2007),
[]byte("this is 32-byte key for Poly1305"),
[]byte{0xda, 0x84, 0xbc, 0xab, 0x02, 0x67, 0x6c, 0x38, 0xcd, 0xb0, 0x15, 0x60, 0x42, 0x74, 0xc2, 0xaa},
},
{
make([]byte, 2007),
make([]byte, 32),
make([]byte, 16),
},
{
// This test triggers an edge-case. See https://go-review.googlesource.com/#/c/30101/.
[]byte{0x81, 0xd8, 0xb2, 0xe4, 0x6a, 0x25, 0x21, 0x3b, 0x58, 0xfe, 0xe4, 0x21, 0x3a, 0x2a, 0x28, 0xe9, 0x21, 0xc1, 0x2a, 0x96, 0x32, 0x51, 0x6d, 0x3b, 0x73, 0x27, 0x27, 0x27, 0xbe, 0xcf, 0x21, 0x29},
[]byte{0x3b, 0x3a, 0x29, 0xe9, 0x3b, 0x21, 0x3a, 0x5c, 0x5c, 0x3b, 0x3b, 0x05, 0x3a, 0x3a, 0x8c, 0x0d},
[]byte{0x6d, 0xc1, 0x8b, 0x8c, 0x34, 0x4c, 0xd7, 0x99, 0x27, 0x11, 0x8b, 0xbe, 0x84, 0xb7, 0xf3, 0x14},
},
}
func testSum(t *testing.T, unaligned bool) {
var out [16]byte
var key [32]byte
for i, v := range testData {
in := v.in
if unaligned {
in = unalignBytes(in)
}
copy(key[:], v.k)
Sum(&out, in, &key)
if !bytes.Equal(out[:], v.correct) {
t.Errorf("%d: expected %x, got %x", i, v.correct, out[:])
}
}
}
func TestSum(t *testing.T) { testSum(t, false) }
func TestSumUnaligned(t *testing.T) { testSum(t, true) }
func benchmark(b *testing.B, size int, unaligned bool) {
var out [16]byte
var key [32]byte
in := make([]byte, size)
if unaligned {
in = unalignBytes(in)
}
b.SetBytes(int64(len(in)))
b.ResetTimer()
for i := 0; i < b.N; i++ {
Sum(&out, in, &key)
}
}
func Benchmark64(b *testing.B) { benchmark(b, 64, false) }
func Benchmark1K(b *testing.B) { benchmark(b, 1024, false) }
func Benchmark64Unaligned(b *testing.B) { benchmark(b, 64, true) }
func Benchmark1KUnaligned(b *testing.B) { benchmark(b, 1024, true) }
func unalignBytes(in []byte) []byte {
out := make([]byte, len(in)+1)
if uintptr(unsafe.Pointer(&out[0]))&(unsafe.Alignof(uint32(0))-1) == 0 {
out = out[1:]
} else {
out = out[:len(in)]
}
copy(out, in)
return out
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine,go1.7
package poly1305
// This function is implemented in sum_amd64.s
//go:noescape
func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]byte)
// Sum generates an authenticator for m using a one-time key and puts the
// 16-byte result into out. Authenticating two different messages with the same
// key allows an attacker to forge messages at will.
func Sum(out *[16]byte, m []byte, key *[32]byte) {
var mPtr *byte
if len(m) > 0 {
mPtr = &m[0]
}
poly1305(out, mPtr, uint64(len(m)), key)
}

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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine,go1.7
#include "textflag.h"
#define POLY1305_ADD(msg, h0, h1, h2) \
ADDQ 0(msg), h0; \
ADCQ 8(msg), h1; \
ADCQ $1, h2; \
LEAQ 16(msg), msg
#define POLY1305_MUL(h0, h1, h2, r0, r1, t0, t1, t2, t3) \
MOVQ r0, AX; \
MULQ h0; \
MOVQ AX, t0; \
MOVQ DX, t1; \
MOVQ r0, AX; \
MULQ h1; \
ADDQ AX, t1; \
ADCQ $0, DX; \
MOVQ r0, t2; \
IMULQ h2, t2; \
ADDQ DX, t2; \
\
MOVQ r1, AX; \
MULQ h0; \
ADDQ AX, t1; \
ADCQ $0, DX; \
MOVQ DX, h0; \
MOVQ r1, t3; \
IMULQ h2, t3; \
MOVQ r1, AX; \
MULQ h1; \
ADDQ AX, t2; \
ADCQ DX, t3; \
ADDQ h0, t2; \
ADCQ $0, t3; \
\
MOVQ t0, h0; \
MOVQ t1, h1; \
MOVQ t2, h2; \
ANDQ $3, h2; \
MOVQ t2, t0; \
ANDQ $0xFFFFFFFFFFFFFFFC, t0; \
ADDQ t0, h0; \
ADCQ t3, h1; \
ADCQ $0, h2; \
SHRQ $2, t3, t2; \
SHRQ $2, t3; \
ADDQ t2, h0; \
ADCQ t3, h1; \
ADCQ $0, h2
DATA poly1305Mask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF
DATA poly1305Mask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC
GLOBL poly1305Mask<>(SB), RODATA, $16
// func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]key)
TEXT ·poly1305(SB), $0-32
MOVQ out+0(FP), DI
MOVQ m+8(FP), SI
MOVQ mlen+16(FP), R15
MOVQ key+24(FP), AX
MOVQ 0(AX), R11
MOVQ 8(AX), R12
ANDQ poly1305Mask<>(SB), R11 // r0
ANDQ poly1305Mask<>+8(SB), R12 // r1
XORQ R8, R8 // h0
XORQ R9, R9 // h1
XORQ R10, R10 // h2
CMPQ R15, $16
JB bytes_between_0_and_15
loop:
POLY1305_ADD(SI, R8, R9, R10)
multiply:
POLY1305_MUL(R8, R9, R10, R11, R12, BX, CX, R13, R14)
SUBQ $16, R15
CMPQ R15, $16
JAE loop
bytes_between_0_and_15:
TESTQ R15, R15
JZ done
MOVQ $1, BX
XORQ CX, CX
XORQ R13, R13
ADDQ R15, SI
flush_buffer:
SHLQ $8, BX, CX
SHLQ $8, BX
MOVB -1(SI), R13
XORQ R13, BX
DECQ SI
DECQ R15
JNZ flush_buffer
ADDQ BX, R8
ADCQ CX, R9
ADCQ $0, R10
MOVQ $16, R15
JMP multiply
done:
MOVQ R8, AX
MOVQ R9, BX
SUBQ $0xFFFFFFFFFFFFFFFB, AX
SBBQ $0xFFFFFFFFFFFFFFFF, BX
SBBQ $3, R10
CMOVQCS R8, AX
CMOVQCS R9, BX
MOVQ key+24(FP), R8
ADDQ 16(R8), AX
ADCQ 24(R8), BX
MOVQ AX, 0(DI)
MOVQ BX, 8(DI)
RET

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build arm,!gccgo,!appengine,!nacl
package poly1305
// This function is implemented in sum_arm.s
//go:noescape
func poly1305_auth_armv6(out *[16]byte, m *byte, mlen uint32, key *[32]byte)
// Sum generates an authenticator for m using a one-time key and puts the
// 16-byte result into out. Authenticating two different messages with the same
// key allows an attacker to forge messages at will.
func Sum(out *[16]byte, m []byte, key *[32]byte) {
var mPtr *byte
if len(m) > 0 {
mPtr = &m[0]
}
poly1305_auth_armv6(out, mPtr, uint32(len(m)), key)
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build arm,!gccgo,!appengine,!nacl
#include "textflag.h"
// This code was translated into a form compatible with 5a from the public
// domain source by Andrew Moon: github.com/floodyberry/poly1305-opt/blob/master/app/extensions/poly1305.
DATA poly1305_init_constants_armv6<>+0x00(SB)/4, $0x3ffffff
DATA poly1305_init_constants_armv6<>+0x04(SB)/4, $0x3ffff03
DATA poly1305_init_constants_armv6<>+0x08(SB)/4, $0x3ffc0ff
DATA poly1305_init_constants_armv6<>+0x0c(SB)/4, $0x3f03fff
DATA poly1305_init_constants_armv6<>+0x10(SB)/4, $0x00fffff
GLOBL poly1305_init_constants_armv6<>(SB), 8, $20
// Warning: the linker may use R11 to synthesize certain instructions. Please
// take care and verify that no synthetic instructions use it.
TEXT poly1305_init_ext_armv6<>(SB), NOSPLIT|NOFRAME, $0
MOVM.DB.W [R4-R11], (R13)
MOVM.IA.W (R1), [R2-R5]
MOVW $poly1305_init_constants_armv6<>(SB), R7
MOVW R2, R8
MOVW R2>>26, R9
MOVW R3>>20, g
MOVW R4>>14, R11
MOVW R5>>8, R12
ORR R3<<6, R9, R9
ORR R4<<12, g, g
ORR R5<<18, R11, R11
MOVM.IA (R7), [R2-R6]
AND R8, R2, R2
AND R9, R3, R3
AND g, R4, R4
AND R11, R5, R5
AND R12, R6, R6
MOVM.IA.W [R2-R6], (R0)
EOR R2, R2, R2
EOR R3, R3, R3
EOR R4, R4, R4
EOR R5, R5, R5
EOR R6, R6, R6
MOVM.IA.W [R2-R6], (R0)
MOVM.IA.W (R1), [R2-R5]
MOVM.IA [R2-R6], (R0)
MOVM.IA.W (R13), [R4-R11]
RET
#define MOVW_UNALIGNED(Rsrc, Rdst, Rtmp, offset) \
MOVBU (offset+0)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+0)(Rdst); \
MOVBU (offset+1)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+1)(Rdst); \
MOVBU (offset+2)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+2)(Rdst); \
MOVBU (offset+3)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+3)(Rdst)
TEXT poly1305_blocks_armv6<>(SB), NOSPLIT|NOFRAME, $0
MOVM.DB.W [R4, R5, R6, R7, R8, R9, g, R11, R14], (R13)
SUB $128, R13
MOVW R0, 36(R13)
MOVW R1, 40(R13)
MOVW R2, 44(R13)
MOVW R1, R14
MOVW R2, R12
MOVW 56(R0), R8
WORD $0xe1180008 // TST R8, R8 not working see issue 5921
EOR R6, R6, R6
MOVW.EQ $(1<<24), R6
MOVW R6, 32(R13)
ADD $64, R13, g
MOVM.IA (R0), [R0-R9]
MOVM.IA [R0-R4], (g)
CMP $16, R12
BLO poly1305_blocks_armv6_done
poly1305_blocks_armv6_mainloop:
WORD $0xe31e0003 // TST R14, #3 not working see issue 5921
BEQ poly1305_blocks_armv6_mainloop_aligned
ADD $48, R13, g
MOVW_UNALIGNED(R14, g, R0, 0)
MOVW_UNALIGNED(R14, g, R0, 4)
MOVW_UNALIGNED(R14, g, R0, 8)
MOVW_UNALIGNED(R14, g, R0, 12)
MOVM.IA (g), [R0-R3]
ADD $16, R14
B poly1305_blocks_armv6_mainloop_loaded
poly1305_blocks_armv6_mainloop_aligned:
MOVM.IA.W (R14), [R0-R3]
poly1305_blocks_armv6_mainloop_loaded:
MOVW R0>>26, g
MOVW R1>>20, R11
MOVW R2>>14, R12
MOVW R14, 40(R13)
MOVW R3>>8, R4
ORR R1<<6, g, g
ORR R2<<12, R11, R11
ORR R3<<18, R12, R12
BIC $0xfc000000, R0, R0
BIC $0xfc000000, g, g
MOVW 32(R13), R3
BIC $0xfc000000, R11, R11
BIC $0xfc000000, R12, R12
ADD R0, R5, R5
ADD g, R6, R6
ORR R3, R4, R4
ADD R11, R7, R7
ADD $64, R13, R14
ADD R12, R8, R8
ADD R4, R9, R9
MOVM.IA (R14), [R0-R4]
MULLU R4, R5, (R11, g)
MULLU R3, R5, (R14, R12)
MULALU R3, R6, (R11, g)
MULALU R2, R6, (R14, R12)
MULALU R2, R7, (R11, g)
MULALU R1, R7, (R14, R12)
ADD R4<<2, R4, R4
ADD R3<<2, R3, R3
MULALU R1, R8, (R11, g)
MULALU R0, R8, (R14, R12)
MULALU R0, R9, (R11, g)
MULALU R4, R9, (R14, R12)
MOVW g, 24(R13)
MOVW R11, 28(R13)
MOVW R12, 16(R13)
MOVW R14, 20(R13)
MULLU R2, R5, (R11, g)
MULLU R1, R5, (R14, R12)
MULALU R1, R6, (R11, g)
MULALU R0, R6, (R14, R12)
MULALU R0, R7, (R11, g)
MULALU R4, R7, (R14, R12)
ADD R2<<2, R2, R2
ADD R1<<2, R1, R1
MULALU R4, R8, (R11, g)
MULALU R3, R8, (R14, R12)
MULALU R3, R9, (R11, g)
MULALU R2, R9, (R14, R12)
MOVW g, 8(R13)
MOVW R11, 12(R13)
MOVW R12, 0(R13)
MOVW R14, w+4(SP)
MULLU R0, R5, (R11, g)
MULALU R4, R6, (R11, g)
MULALU R3, R7, (R11, g)
MULALU R2, R8, (R11, g)
MULALU R1, R9, (R11, g)
MOVM.IA (R13), [R0-R7]
MOVW g>>26, R12
MOVW R4>>26, R14
ORR R11<<6, R12, R12
ORR R5<<6, R14, R14
BIC $0xfc000000, g, g
BIC $0xfc000000, R4, R4
ADD.S R12, R0, R0
ADC $0, R1, R1
ADD.S R14, R6, R6
ADC $0, R7, R7
MOVW R0>>26, R12
MOVW R6>>26, R14
ORR R1<<6, R12, R12
ORR R7<<6, R14, R14
BIC $0xfc000000, R0, R0
BIC $0xfc000000, R6, R6
ADD R14<<2, R14, R14
ADD.S R12, R2, R2
ADC $0, R3, R3
ADD R14, g, g
MOVW R2>>26, R12
MOVW g>>26, R14
ORR R3<<6, R12, R12
BIC $0xfc000000, g, R5
BIC $0xfc000000, R2, R7
ADD R12, R4, R4
ADD R14, R0, R0
MOVW R4>>26, R12
BIC $0xfc000000, R4, R8
ADD R12, R6, R9
MOVW w+44(SP), R12
MOVW w+40(SP), R14
MOVW R0, R6
CMP $32, R12
SUB $16, R12, R12
MOVW R12, 44(R13)
BHS poly1305_blocks_armv6_mainloop
poly1305_blocks_armv6_done:
MOVW 36(R13), R12
MOVW R5, 20(R12)
MOVW R6, 24(R12)
MOVW R7, 28(R12)
MOVW R8, 32(R12)
MOVW R9, 36(R12)
ADD $128, R13, R13
MOVM.IA.W (R13), [R4, R5, R6, R7, R8, R9, g, R11, R14]
RET
#define MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp) \
MOVBU.P 1(Rsrc), Rtmp; \
MOVBU.P Rtmp, 1(Rdst); \
MOVBU.P 1(Rsrc), Rtmp; \
MOVBU.P Rtmp, 1(Rdst)
#define MOVWP_UNALIGNED(Rsrc, Rdst, Rtmp) \
MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp); \
MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp)
TEXT poly1305_finish_ext_armv6<>(SB), NOSPLIT | NOFRAME, $0
MOVM.DB.W [R4, R5, R6, R7, R8, R9, g, R11, R14], (R13)
SUB $16, R13, R13
MOVW R0, R5
MOVW R1, R6
MOVW R2, R7
MOVW R3, R8
AND.S R2, R2, R2
BEQ poly1305_finish_ext_armv6_noremaining
EOR R0, R0
MOVW R13, R9
MOVW R0, 0(R13)
MOVW R0, 4(R13)
MOVW R0, 8(R13)
MOVW R0, 12(R13)
WORD $0xe3110003 // TST R1, #3 not working see issue 5921
BEQ poly1305_finish_ext_armv6_aligned
WORD $0xe3120008 // TST R2, #8 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip8
MOVWP_UNALIGNED(R1, R9, g)
MOVWP_UNALIGNED(R1, R9, g)
poly1305_finish_ext_armv6_skip8:
WORD $0xe3120004 // TST $4, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip4
MOVWP_UNALIGNED(R1, R9, g)
poly1305_finish_ext_armv6_skip4:
WORD $0xe3120002 // TST $2, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip2
MOVHUP_UNALIGNED(R1, R9, g)
B poly1305_finish_ext_armv6_skip2
poly1305_finish_ext_armv6_aligned:
WORD $0xe3120008 // TST R2, #8 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip8_aligned
MOVM.IA.W (R1), [g-R11]
MOVM.IA.W [g-R11], (R9)
poly1305_finish_ext_armv6_skip8_aligned:
WORD $0xe3120004 // TST $4, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip4_aligned
MOVW.P 4(R1), g
MOVW.P g, 4(R9)
poly1305_finish_ext_armv6_skip4_aligned:
WORD $0xe3120002 // TST $2, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip2
MOVHU.P 2(R1), g
MOVH.P g, 2(R9)
poly1305_finish_ext_armv6_skip2:
WORD $0xe3120001 // TST $1, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip1
MOVBU.P 1(R1), g
MOVBU.P g, 1(R9)
poly1305_finish_ext_armv6_skip1:
MOVW $1, R11
MOVBU R11, 0(R9)
MOVW R11, 56(R5)
MOVW R5, R0
MOVW R13, R1
MOVW $16, R2
BL poly1305_blocks_armv6<>(SB)
poly1305_finish_ext_armv6_noremaining:
MOVW 20(R5), R0
MOVW 24(R5), R1
MOVW 28(R5), R2
MOVW 32(R5), R3
MOVW 36(R5), R4
MOVW R4>>26, R12
BIC $0xfc000000, R4, R4
ADD R12<<2, R12, R12
ADD R12, R0, R0
MOVW R0>>26, R12
BIC $0xfc000000, R0, R0
ADD R12, R1, R1
MOVW R1>>26, R12
BIC $0xfc000000, R1, R1
ADD R12, R2, R2
MOVW R2>>26, R12
BIC $0xfc000000, R2, R2
ADD R12, R3, R3
MOVW R3>>26, R12
BIC $0xfc000000, R3, R3
ADD R12, R4, R4
ADD $5, R0, R6
MOVW R6>>26, R12
BIC $0xfc000000, R6, R6
ADD R12, R1, R7
MOVW R7>>26, R12
BIC $0xfc000000, R7, R7
ADD R12, R2, g
MOVW g>>26, R12
BIC $0xfc000000, g, g
ADD R12, R3, R11
MOVW $-(1<<26), R12
ADD R11>>26, R12, R12
BIC $0xfc000000, R11, R11
ADD R12, R4, R14
MOVW R14>>31, R12
SUB $1, R12
AND R12, R6, R6
AND R12, R7, R7
AND R12, g, g
AND R12, R11, R11
AND R12, R14, R14
MVN R12, R12
AND R12, R0, R0
AND R12, R1, R1
AND R12, R2, R2
AND R12, R3, R3
AND R12, R4, R4
ORR R6, R0, R0
ORR R7, R1, R1
ORR g, R2, R2
ORR R11, R3, R3
ORR R14, R4, R4
ORR R1<<26, R0, R0
MOVW R1>>6, R1
ORR R2<<20, R1, R1
MOVW R2>>12, R2
ORR R3<<14, R2, R2
MOVW R3>>18, R3
ORR R4<<8, R3, R3
MOVW 40(R5), R6
MOVW 44(R5), R7
MOVW 48(R5), g
MOVW 52(R5), R11
ADD.S R6, R0, R0
ADC.S R7, R1, R1
ADC.S g, R2, R2
ADC.S R11, R3, R3
MOVM.IA [R0-R3], (R8)
MOVW R5, R12
EOR R0, R0, R0
EOR R1, R1, R1
EOR R2, R2, R2
EOR R3, R3, R3
EOR R4, R4, R4
EOR R5, R5, R5
EOR R6, R6, R6
EOR R7, R7, R7
MOVM.IA.W [R0-R7], (R12)
MOVM.IA [R0-R7], (R12)
ADD $16, R13, R13
MOVM.IA.W (R13), [R4, R5, R6, R7, R8, R9, g, R11, R14]
RET
// func poly1305_auth_armv6(out *[16]byte, m *byte, mlen uint32, key *[32]key)
TEXT ·poly1305_auth_armv6(SB), $280-16
MOVW out+0(FP), R4
MOVW m+4(FP), R5
MOVW mlen+8(FP), R6
MOVW key+12(FP), R7
MOVW R13, R8
BIC $63, R13
SUB $64, R13, R13
MOVW R13, R0
MOVW R7, R1
BL poly1305_init_ext_armv6<>(SB)
BIC.S $15, R6, R2
BEQ poly1305_auth_armv6_noblocks
MOVW R13, R0
MOVW R5, R1
ADD R2, R5, R5
SUB R2, R6, R6
BL poly1305_blocks_armv6<>(SB)
poly1305_auth_armv6_noblocks:
MOVW R13, R0
MOVW R5, R1
MOVW R6, R2
MOVW R4, R3
BL poly1305_finish_ext_armv6<>(SB)
MOVW R8, R13
RET

1531
src/vendor/golang_org/x/crypto/poly1305/sum_ref.go vendored Normal file
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