admin/kubesphere
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

monitoring dashboard dependency vendor

Browse Source 
Signed-off-by: junotx <junotx@126.com>
This commit is contained in:
junotx
2021-03-12 16:58:19 +08:00
parent 4f5c1378f8
commit 0c1f994695
462 changed files with 44469 additions and 51096 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
vendor/golang.org/x/crypto/chacha20/chacha_arm64.go generated vendored Normal file
View File

@@ -0,0 +1,16 @@
// Copyright 2018 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 go1.11,!gccgo,!purego
package chacha20
const bufSize = 256
//go:noescape
func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter)
}

3
vendor/golang.org/x/crypto/internal/chacha20/asm_arm64.s → vendor/golang.org/x/crypto/chacha20/chacha_arm64.s generated vendored
View File

@@ -2,8 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build go1.11
// +build !gccgo,!appengine
// +build go1.11,!gccgo,!purego
#include "textflag.h"

398
vendor/golang.org/x/crypto/chacha20/chacha_generic.go generated vendored Normal file
View File

@@ -0,0 +1,398 @@
// 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 ChaCha20 and XChaCha20 encryption algorithms
// as specified in RFC 8439 and draft-irtf-cfrg-xchacha-01.
package chacha20
import (
"crypto/cipher"
"encoding/binary"
"errors"
"math/bits"
"golang.org/x/crypto/internal/subtle"
)
const (
// KeySize is the size of the key used by this cipher, in bytes.
KeySize = 32
// NonceSize is the size of the nonce used with the standard variant of this
// cipher, in bytes.
//
// Note that this is too short to be safely generated at random if the same
// key is reused more than 2³² times.
NonceSize = 12
// NonceSizeX is the size of the nonce used with the XChaCha20 variant of
// this cipher, in bytes.
NonceSizeX = 24
)
// Cipher is a stateful instance of ChaCha20 or XChaCha20 using a particular key
// and nonce. A *Cipher implements the cipher.Stream interface.
type Cipher struct {
// The ChaCha20 state is 16 words: 4 constant, 8 of key, 1 of counter
// (incremented after each block), and 3 of nonce.
key [8]uint32
counter uint32
nonce [3]uint32
// The last len bytes of buf are leftover key stream bytes from the previous
// XORKeyStream invocation. The size of buf depends on how many blocks are
// computed at a time by xorKeyStreamBlocks.
buf [bufSize]byte
len int
// overflow is set when the counter overflowed, no more blocks can be
// generated, and the next XORKeyStream call should panic.
overflow bool
// The counter-independent results of the first round are cached after they
// are computed the first time.
precompDone bool
p1, p5, p9, p13 uint32
p2, p6, p10, p14 uint32
p3, p7, p11, p15 uint32
}
var _ cipher.Stream = (*Cipher)(nil)
// NewUnauthenticatedCipher creates a new ChaCha20 stream cipher with the given
// 32 bytes key and a 12 or 24 bytes nonce. If a nonce of 24 bytes is provided,
// the XChaCha20 construction will be used. It returns an error if key or nonce
// have any other length.
//
// Note that ChaCha20, like all stream ciphers, is not authenticated and allows
// attackers to silently tamper with the plaintext. For this reason, it is more
// appropriate as a building block than as a standalone encryption mechanism.
// Instead, consider using package golang.org/x/crypto/chacha20poly1305.
func NewUnauthenticatedCipher(key, nonce []byte) (*Cipher, error) {
// This function is split into a wrapper so that the Cipher allocation will
// be inlined, and depending on how the caller uses the return value, won't
// escape to the heap.
c := &Cipher{}
return newUnauthenticatedCipher(c, key, nonce)
}
func newUnauthenticatedCipher(c *Cipher, key, nonce []byte) (*Cipher, error) {
if len(key) != KeySize {
return nil, errors.New("chacha20: wrong key size")
}
if len(nonce) == NonceSizeX {
// XChaCha20 uses the ChaCha20 core to mix 16 bytes of the nonce into a
// derived key, allowing it to operate on a nonce of 24 bytes. See
// draft-irtf-cfrg-xchacha-01, Section 2.3.
key, _ = HChaCha20(key, nonce[0:16])
cNonce := make([]byte, NonceSize)
copy(cNonce[4:12], nonce[16:24])
nonce = cNonce
} else if len(nonce) != NonceSize {
return nil, errors.New("chacha20: wrong nonce size")
}
key, nonce = key[:KeySize], nonce[:NonceSize] // bounds check elimination hint
c.key = [8]uint32{
binary.LittleEndian.Uint32(key[0:4]),
binary.LittleEndian.Uint32(key[4:8]),
binary.LittleEndian.Uint32(key[8:12]),
binary.LittleEndian.Uint32(key[12:16]),
binary.LittleEndian.Uint32(key[16:20]),
binary.LittleEndian.Uint32(key[20:24]),
binary.LittleEndian.Uint32(key[24:28]),
binary.LittleEndian.Uint32(key[28:32]),
}
c.nonce = [3]uint32{
binary.LittleEndian.Uint32(nonce[0:4]),
binary.LittleEndian.Uint32(nonce[4:8]),
binary.LittleEndian.Uint32(nonce[8:12]),
}
return c, nil
}
// The constant first 4 words of the ChaCha20 state.
const (
j0 uint32 = 0x61707865 // expa
j1 uint32 = 0x3320646e // nd 3
j2 uint32 = 0x79622d32 // 2-by
j3 uint32 = 0x6b206574 // te k
)
const blockSize = 64
// quarterRound is the core of ChaCha20. It shuffles the bits of 4 state words.
// It's executed 4 times for each of the 20 ChaCha20 rounds, operating on all 16
// words each round, in columnar or diagonal groups of 4 at a time.
func quarterRound(a, b, c, d uint32) (uint32, uint32, uint32, uint32) {
a += b
d ^= a
d = bits.RotateLeft32(d, 16)
c += d
b ^= c
b = bits.RotateLeft32(b, 12)
a += b
d ^= a
d = bits.RotateLeft32(d, 8)
c += d
b ^= c
b = bits.RotateLeft32(b, 7)
return a, b, c, d
}
// SetCounter sets the Cipher counter. The next invocation of XORKeyStream will
// behave as if (64 * counter) bytes had been encrypted so far.
//
// To prevent accidental counter reuse, SetCounter panics if counter is less
// than the current value.
//
// Note that the execution time of XORKeyStream is not independent of the
// counter value.
func (s *Cipher) SetCounter(counter uint32) {
// Internally, s may buffer multiple blocks, which complicates this
// implementation slightly. When checking whether the counter has rolled
// back, we must use both s.counter and s.len to determine how many blocks
// we have already output.
outputCounter := s.counter - uint32(s.len)/blockSize
if s.overflow || counter < outputCounter {
panic("chacha20: SetCounter attempted to rollback counter")
}
// In the general case, we set the new counter value and reset s.len to 0,
// causing the next call to XORKeyStream to refill the buffer. However, if
// we're advancing within the existing buffer, we can save work by simply
// setting s.len.
if counter < s.counter {
s.len = int(s.counter-counter) * blockSize
} else {
s.counter = counter
s.len = 0
}
}
// XORKeyStream XORs each byte in the given slice with a byte from the
// cipher's key stream. Dst and src must overlap entirely or not at all.
//
// If len(dst) < len(src), XORKeyStream will panic. It is acceptable
// to pass a dst bigger than src, and in that case, XORKeyStream will
// only update dst[:len(src)] and will not touch the rest of dst.
//
// Multiple calls to XORKeyStream behave as if the concatenation of
// the src buffers was passed in a single run. That is, Cipher
// maintains state and does not reset at each XORKeyStream call.
func (s *Cipher) XORKeyStream(dst, src []byte) {
if len(src) == 0 {
return
}
if len(dst) < len(src) {
panic("chacha20: output smaller than input")
}
dst = dst[:len(src)]
if subtle.InexactOverlap(dst, src) {
panic("chacha20: invalid buffer overlap")
}
// First, drain any remaining key stream from a previous XORKeyStream.
if s.len != 0 {
keyStream := s.buf[bufSize-s.len:]
if len(src) < len(keyStream) {
keyStream = keyStream[:len(src)]
}
_ = src[len(keyStream)-1] // bounds check elimination hint
for i, b := range keyStream {
dst[i] = src[i] ^ b
}
s.len -= len(keyStream)
dst, src = dst[len(keyStream):], src[len(keyStream):]
}
if len(src) == 0 {
return
}
// If we'd need to let the counter overflow and keep generating output,
// panic immediately. If instead we'd only reach the last block, remember
// not to generate any more output after the buffer is drained.
numBlocks := (uint64(len(src)) + blockSize - 1) / blockSize
if s.overflow || uint64(s.counter)+numBlocks > 1<<32 {
panic("chacha20: counter overflow")
} else if uint64(s.counter)+numBlocks == 1<<32 {
s.overflow = true
}
// xorKeyStreamBlocks implementations expect input lengths that are a
// multiple of bufSize. Platform-specific ones process multiple blocks at a
// time, so have bufSizes that are a multiple of blockSize.
full := len(src) - len(src)%bufSize
if full > 0 {
s.xorKeyStreamBlocks(dst[:full], src[:full])
}
dst, src = dst[full:], src[full:]
// If using a multi-block xorKeyStreamBlocks would overflow, use the generic
// one that does one block at a time.
const blocksPerBuf = bufSize / blockSize
if uint64(s.counter)+blocksPerBuf > 1<<32 {
s.buf = [bufSize]byte{}
numBlocks := (len(src) + blockSize - 1) / blockSize
buf := s.buf[bufSize-numBlocks*blockSize:]
copy(buf, src)
s.xorKeyStreamBlocksGeneric(buf, buf)
s.len = len(buf) - copy(dst, buf)
return
}
// If we have a partial (multi-)block, pad it for xorKeyStreamBlocks, and
// keep the leftover keystream for the next XORKeyStream invocation.
if len(src) > 0 {
s.buf = [bufSize]byte{}
copy(s.buf[:], src)
s.xorKeyStreamBlocks(s.buf[:], s.buf[:])
s.len = bufSize - copy(dst, s.buf[:])
}
}
func (s *Cipher) xorKeyStreamBlocksGeneric(dst, src []byte) {
if len(dst) != len(src) || len(dst)%blockSize != 0 {
panic("chacha20: internal error: wrong dst and/or src length")
}
// To generate each block of key stream, the initial cipher state
// (represented below) is passed through 20 rounds of shuffling,
// alternatively applying quarterRounds by columns (like 1, 5, 9, 13)
// or by diagonals (like 1, 6, 11, 12).
//
// 0:cccccccc 1:cccccccc 2:cccccccc 3:cccccccc
// 4:kkkkkkkk 5:kkkkkkkk 6:kkkkkkkk 7:kkkkkkkk
// 8:kkkkkkkk 9:kkkkkkkk 10:kkkkkkkk 11:kkkkkkkk
// 12:bbbbbbbb 13:nnnnnnnn 14:nnnnnnnn 15:nnnnnnnn
//
// c=constant k=key b=blockcount n=nonce
var (
c0, c1, c2, c3 = j0, j1, j2, j3
c4, c5, c6, c7 = s.key[0], s.key[1], s.key[2], s.key[3]
c8, c9, c10, c11 = s.key[4], s.key[5], s.key[6], s.key[7]
_, c13, c14, c15 = s.counter, s.nonce[0], s.nonce[1], s.nonce[2]
)
// Three quarters of the first round don't depend on the counter, so we can
// calculate them here, and reuse them for multiple blocks in the loop, and
// for future XORKeyStream invocations.
if !s.precompDone {
s.p1, s.p5, s.p9, s.p13 = quarterRound(c1, c5, c9, c13)
s.p2, s.p6, s.p10, s.p14 = quarterRound(c2, c6, c10, c14)
s.p3, s.p7, s.p11, s.p15 = quarterRound(c3, c7, c11, c15)
s.precompDone = true
}
// A condition of len(src) > 0 would be sufficient, but this also
// acts as a bounds check elimination hint.
for len(src) >= 64 && len(dst) >= 64 {
// The remainder of the first column round.
fcr0, fcr4, fcr8, fcr12 := quarterRound(c0, c4, c8, s.counter)
// The second diagonal round.
x0, x5, x10, x15 := quarterRound(fcr0, s.p5, s.p10, s.p15)
x1, x6, x11, x12 := quarterRound(s.p1, s.p6, s.p11, fcr12)
x2, x7, x8, x13 := quarterRound(s.p2, s.p7, fcr8, s.p13)
x3, x4, x9, x14 := quarterRound(s.p3, fcr4, s.p9, s.p14)
// The remaining 18 rounds.
for i := 0; i < 9; i++ {
// Column round.
x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12)
x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13)
x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14)
x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15)
// Diagonal round.
x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15)
x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12)
x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13)
x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14)
}
// Add back the initial state to generate the key stream, then
// XOR the key stream with the source and write out the result.
addXor(dst[0:4], src[0:4], x0, c0)
addXor(dst[4:8], src[4:8], x1, c1)
addXor(dst[8:12], src[8:12], x2, c2)
addXor(dst[12:16], src[12:16], x3, c3)
addXor(dst[16:20], src[16:20], x4, c4)
addXor(dst[20:24], src[20:24], x5, c5)
addXor(dst[24:28], src[24:28], x6, c6)
addXor(dst[28:32], src[28:32], x7, c7)
addXor(dst[32:36], src[32:36], x8, c8)
addXor(dst[36:40], src[36:40], x9, c9)
addXor(dst[40:44], src[40:44], x10, c10)
addXor(dst[44:48], src[44:48], x11, c11)
addXor(dst[48:52], src[48:52], x12, s.counter)
addXor(dst[52:56], src[52:56], x13, c13)
addXor(dst[56:60], src[56:60], x14, c14)
addXor(dst[60:64], src[60:64], x15, c15)
s.counter += 1
src, dst = src[blockSize:], dst[blockSize:]
}
}
// HChaCha20 uses the ChaCha20 core to generate a derived key from a 32 bytes
// key and a 16 bytes nonce. It returns an error if key or nonce have any other
// length. It is used as part of the XChaCha20 construction.
func HChaCha20(key, nonce []byte) ([]byte, error) {
// This function is split into a wrapper so that the slice allocation will
// be inlined, and depending on how the caller uses the return value, won't
// escape to the heap.
out := make([]byte, 32)
return hChaCha20(out, key, nonce)
}
func hChaCha20(out, key, nonce []byte) ([]byte, error) {
if len(key) != KeySize {
return nil, errors.New("chacha20: wrong HChaCha20 key size")
}
if len(nonce) != 16 {
return nil, errors.New("chacha20: wrong HChaCha20 nonce size")
}
x0, x1, x2, x3 := j0, j1, j2, j3
x4 := binary.LittleEndian.Uint32(key[0:4])
x5 := binary.LittleEndian.Uint32(key[4:8])
x6 := binary.LittleEndian.Uint32(key[8:12])
x7 := binary.LittleEndian.Uint32(key[12:16])
x8 := binary.LittleEndian.Uint32(key[16:20])
x9 := binary.LittleEndian.Uint32(key[20:24])
x10 := binary.LittleEndian.Uint32(key[24:28])
x11 := binary.LittleEndian.Uint32(key[28:32])
x12 := binary.LittleEndian.Uint32(nonce[0:4])
x13 := binary.LittleEndian.Uint32(nonce[4:8])
x14 := binary.LittleEndian.Uint32(nonce[8:12])
x15 := binary.LittleEndian.Uint32(nonce[12:16])
for i := 0; i < 10; i++ {
// Diagonal round.
x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12)
x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13)
x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14)
x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15)
// Column round.
x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15)
x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12)
x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13)
x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14)
}
_ = out[31] // bounds check elimination hint
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], x12)
binary.LittleEndian.PutUint32(out[20:24], x13)
binary.LittleEndian.PutUint32(out[24:28], x14)
binary.LittleEndian.PutUint32(out[28:32], x15)
return out, nil
}

11
vendor/golang.org/x/crypto/internal/chacha20/chacha_noasm.go → vendor/golang.org/x/crypto/chacha20/chacha_noasm.go generated vendored
View File

@@ -2,15 +2,12 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !arm64,!s390x arm64,!go1.11 gccgo appengine
// +build !arm64,!s390x,!ppc64le arm64,!go1.11 gccgo purego
package chacha20
const (
bufSize = 64
haveAsm = false
)
const bufSize = blockSize
func (*Cipher) xorKeyStreamAsm(dst, src []byte) {
panic("not implemented")
func (s *Cipher) xorKeyStreamBlocks(dst, src []byte) {
s.xorKeyStreamBlocksGeneric(dst, src)
}

16
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.go generated vendored Normal file
View File

@@ -0,0 +1,16 @@
// Copyright 2019 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 !gccgo,!purego
package chacha20
const bufSize = 256
//go:noescape
func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
chaCha20_ctr32_vsx(&dst[0], &src[0], len(src), &c.key, &c.counter)
}

449
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.s generated vendored Normal file
View File

@@ -0,0 +1,449 @@
// Copyright 2019 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.
// Based on CRYPTOGAMS code with the following comment:
// # ====================================================================
// # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
// # project. The module is, however, dual licensed under OpenSSL and
// # CRYPTOGAMS licenses depending on where you obtain it. For further
// # details see http://www.openssl.org/~appro/cryptogams/.
// # ====================================================================
// Code for the perl script that generates the ppc64 assembler
// can be found in the cryptogams repository at the link below. It is based on
// the original from openssl.
// https://github.com/dot-asm/cryptogams/commit/a60f5b50ed908e91
// The differences in this and the original implementation are
// due to the calling conventions and initialization of constants.
// +build !gccgo,!purego
#include "textflag.h"
#define OUT R3
#define INP R4
#define LEN R5
#define KEY R6
#define CNT R7
#define TMP R15
#define CONSTBASE R16
#define BLOCKS R17
DATA consts<>+0x00(SB)/8, $0x3320646e61707865
DATA consts<>+0x08(SB)/8, $0x6b20657479622d32
DATA consts<>+0x10(SB)/8, $0x0000000000000001
DATA consts<>+0x18(SB)/8, $0x0000000000000000
DATA consts<>+0x20(SB)/8, $0x0000000000000004
DATA consts<>+0x28(SB)/8, $0x0000000000000000
DATA consts<>+0x30(SB)/8, $0x0a0b08090e0f0c0d
DATA consts<>+0x38(SB)/8, $0x0203000106070405
DATA consts<>+0x40(SB)/8, $0x090a0b080d0e0f0c
DATA consts<>+0x48(SB)/8, $0x0102030005060704
DATA consts<>+0x50(SB)/8, $0x6170786561707865
DATA consts<>+0x58(SB)/8, $0x6170786561707865
DATA consts<>+0x60(SB)/8, $0x3320646e3320646e
DATA consts<>+0x68(SB)/8, $0x3320646e3320646e
DATA consts<>+0x70(SB)/8, $0x79622d3279622d32
DATA consts<>+0x78(SB)/8, $0x79622d3279622d32
DATA consts<>+0x80(SB)/8, $0x6b2065746b206574
DATA consts<>+0x88(SB)/8, $0x6b2065746b206574
DATA consts<>+0x90(SB)/8, $0x0000000100000000
DATA consts<>+0x98(SB)/8, $0x0000000300000002
GLOBL consts<>(SB), RODATA, $0xa0
//func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
TEXT ·chaCha20_ctr32_vsx(SB),NOSPLIT,$64-40
MOVD out+0(FP), OUT
MOVD inp+8(FP), INP
MOVD len+16(FP), LEN
MOVD key+24(FP), KEY
MOVD counter+32(FP), CNT
// Addressing for constants
MOVD $consts<>+0x00(SB), CONSTBASE
MOVD $16, R8
MOVD $32, R9
MOVD $48, R10
MOVD $64, R11
SRD $6, LEN, BLOCKS
// V16
LXVW4X (CONSTBASE)(R0), VS48
ADD $80,CONSTBASE
// Load key into V17,V18
LXVW4X (KEY)(R0), VS49
LXVW4X (KEY)(R8), VS50
// Load CNT, NONCE into V19
LXVW4X (CNT)(R0), VS51
// Clear V27
VXOR V27, V27, V27
// V28
LXVW4X (CONSTBASE)(R11), VS60
// splat slot from V19 -> V26
VSPLTW $0, V19, V26
VSLDOI $4, V19, V27, V19
VSLDOI $12, V27, V19, V19
VADDUWM V26, V28, V26
MOVD $10, R14
MOVD R14, CTR
loop_outer_vsx:
// V0, V1, V2, V3
LXVW4X (R0)(CONSTBASE), VS32
LXVW4X (R8)(CONSTBASE), VS33
LXVW4X (R9)(CONSTBASE), VS34
LXVW4X (R10)(CONSTBASE), VS35
// splat values from V17, V18 into V4-V11
VSPLTW $0, V17, V4
VSPLTW $1, V17, V5
VSPLTW $2, V17, V6
VSPLTW $3, V17, V7
VSPLTW $0, V18, V8
VSPLTW $1, V18, V9
VSPLTW $2, V18, V10
VSPLTW $3, V18, V11
// VOR
VOR V26, V26, V12
// splat values from V19 -> V13, V14, V15
VSPLTW $1, V19, V13
VSPLTW $2, V19, V14
VSPLTW $3, V19, V15
// splat const values
VSPLTISW $-16, V27
VSPLTISW $12, V28
VSPLTISW $8, V29
VSPLTISW $7, V30
loop_vsx:
VADDUWM V0, V4, V0
VADDUWM V1, V5, V1
VADDUWM V2, V6, V2
VADDUWM V3, V7, V3
VXOR V12, V0, V12
VXOR V13, V1, V13
VXOR V14, V2, V14
VXOR V15, V3, V15
VRLW V12, V27, V12
VRLW V13, V27, V13
VRLW V14, V27, V14
VRLW V15, V27, V15
VADDUWM V8, V12, V8
VADDUWM V9, V13, V9
VADDUWM V10, V14, V10
VADDUWM V11, V15, V11
VXOR V4, V8, V4
VXOR V5, V9, V5
VXOR V6, V10, V6
VXOR V7, V11, V7
VRLW V4, V28, V4
VRLW V5, V28, V5
VRLW V6, V28, V6
VRLW V7, V28, V7
VADDUWM V0, V4, V0
VADDUWM V1, V5, V1
VADDUWM V2, V6, V2
VADDUWM V3, V7, V3
VXOR V12, V0, V12
VXOR V13, V1, V13
VXOR V14, V2, V14
VXOR V15, V3, V15
VRLW V12, V29, V12
VRLW V13, V29, V13
VRLW V14, V29, V14
VRLW V15, V29, V15
VADDUWM V8, V12, V8
VADDUWM V9, V13, V9
VADDUWM V10, V14, V10
VADDUWM V11, V15, V11
VXOR V4, V8, V4
VXOR V5, V9, V5
VXOR V6, V10, V6
VXOR V7, V11, V7
VRLW V4, V30, V4
VRLW V5, V30, V5
VRLW V6, V30, V6
VRLW V7, V30, V7
VADDUWM V0, V5, V0
VADDUWM V1, V6, V1
VADDUWM V2, V7, V2
VADDUWM V3, V4, V3
VXOR V15, V0, V15
VXOR V12, V1, V12
VXOR V13, V2, V13
VXOR V14, V3, V14
VRLW V15, V27, V15
VRLW V12, V27, V12
VRLW V13, V27, V13
VRLW V14, V27, V14
VADDUWM V10, V15, V10
VADDUWM V11, V12, V11
VADDUWM V8, V13, V8
VADDUWM V9, V14, V9
VXOR V5, V10, V5
VXOR V6, V11, V6
VXOR V7, V8, V7
VXOR V4, V9, V4
VRLW V5, V28, V5
VRLW V6, V28, V6
VRLW V7, V28, V7
VRLW V4, V28, V4
VADDUWM V0, V5, V0
VADDUWM V1, V6, V1
VADDUWM V2, V7, V2
VADDUWM V3, V4, V3
VXOR V15, V0, V15
VXOR V12, V1, V12
VXOR V13, V2, V13
VXOR V14, V3, V14
VRLW V15, V29, V15
VRLW V12, V29, V12
VRLW V13, V29, V13
VRLW V14, V29, V14
VADDUWM V10, V15, V10
VADDUWM V11, V12, V11
VADDUWM V8, V13, V8
VADDUWM V9, V14, V9
VXOR V5, V10, V5
VXOR V6, V11, V6
VXOR V7, V8, V7
VXOR V4, V9, V4
VRLW V5, V30, V5
VRLW V6, V30, V6
VRLW V7, V30, V7
VRLW V4, V30, V4
BC 16, LT, loop_vsx
VADDUWM V12, V26, V12
WORD $0x13600F8C // VMRGEW V0, V1, V27
WORD $0x13821F8C // VMRGEW V2, V3, V28
WORD $0x10000E8C // VMRGOW V0, V1, V0
WORD $0x10421E8C // VMRGOW V2, V3, V2
WORD $0x13A42F8C // VMRGEW V4, V5, V29
WORD $0x13C63F8C // VMRGEW V6, V7, V30
XXPERMDI VS32, VS34, $0, VS33
XXPERMDI VS32, VS34, $3, VS35
XXPERMDI VS59, VS60, $0, VS32
XXPERMDI VS59, VS60, $3, VS34
WORD $0x10842E8C // VMRGOW V4, V5, V4
WORD $0x10C63E8C // VMRGOW V6, V7, V6
WORD $0x13684F8C // VMRGEW V8, V9, V27
WORD $0x138A5F8C // VMRGEW V10, V11, V28
XXPERMDI VS36, VS38, $0, VS37
XXPERMDI VS36, VS38, $3, VS39
XXPERMDI VS61, VS62, $0, VS36
XXPERMDI VS61, VS62, $3, VS38
WORD $0x11084E8C // VMRGOW V8, V9, V8
WORD $0x114A5E8C // VMRGOW V10, V11, V10
WORD $0x13AC6F8C // VMRGEW V12, V13, V29
WORD $0x13CE7F8C // VMRGEW V14, V15, V30
XXPERMDI VS40, VS42, $0, VS41
XXPERMDI VS40, VS42, $3, VS43
XXPERMDI VS59, VS60, $0, VS40
XXPERMDI VS59, VS60, $3, VS42
WORD $0x118C6E8C // VMRGOW V12, V13, V12
WORD $0x11CE7E8C // VMRGOW V14, V15, V14
VSPLTISW $4, V27
VADDUWM V26, V27, V26
XXPERMDI VS44, VS46, $0, VS45
XXPERMDI VS44, VS46, $3, VS47
XXPERMDI VS61, VS62, $0, VS44
XXPERMDI VS61, VS62, $3, VS46
VADDUWM V0, V16, V0
VADDUWM V4, V17, V4
VADDUWM V8, V18, V8
VADDUWM V12, V19, V12
CMPU LEN, $64
BLT tail_vsx
// Bottom of loop
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V1, V16, V0
VADDUWM V5, V17, V4
VADDUWM V9, V18, V8
VADDUWM V13, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(V10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V2, V16, V0
VADDUWM V6, V17, V4
VADDUWM V10, V18, V8
VADDUWM V14, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
BEQ done_vsx
VADDUWM V3, V16, V0
VADDUWM V7, V17, V4
VADDUWM V11, V18, V8
VADDUWM V15, V19, V12
CMPU LEN, $64
BLT tail_vsx
LXVW4X (INP)(R0), VS59
LXVW4X (INP)(R8), VS60
LXVW4X (INP)(R9), VS61
LXVW4X (INP)(R10), VS62
VXOR V27, V0, V27
VXOR V28, V4, V28
VXOR V29, V8, V29
VXOR V30, V12, V30
STXVW4X VS59, (OUT)(R0)
STXVW4X VS60, (OUT)(R8)
ADD $64, INP
STXVW4X VS61, (OUT)(R9)
ADD $-64, LEN
STXVW4X VS62, (OUT)(R10)
ADD $64, OUT
MOVD $10, R14
MOVD R14, CTR
BNE loop_outer_vsx
done_vsx:
// Increment counter by number of 64 byte blocks
MOVD (CNT), R14
ADD BLOCKS, R14
MOVD R14, (CNT)
RET
tail_vsx:
ADD $32, R1, R11
MOVD LEN, CTR
// Save values on stack to copy from
STXVW4X VS32, (R11)(R0)
STXVW4X VS36, (R11)(R8)
STXVW4X VS40, (R11)(R9)
STXVW4X VS44, (R11)(R10)
ADD $-1, R11, R12
ADD $-1, INP
ADD $-1, OUT
looptail_vsx:
// Copying the result to OUT
// in bytes.
MOVBZU 1(R12), KEY
MOVBZU 1(INP), TMP
XOR KEY, TMP, KEY
MOVBU KEY, 1(OUT)
BC 16, LT, looptail_vsx
// Clear the stack values
STXVW4X VS48, (R11)(R0)
STXVW4X VS48, (R11)(R8)
STXVW4X VS48, (R11)(R9)
STXVW4X VS48, (R11)(R10)
BR done_vsx

26
vendor/golang.org/x/crypto/chacha20/chacha_s390x.go generated vendored Normal file
View File

@@ -0,0 +1,26 @@
// Copyright 2018 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 !gccgo,!purego
package chacha20
import "golang.org/x/sys/cpu"
var haveAsm = cpu.S390X.HasVX
const bufSize = 256
// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only
// be called when the vector facility is available. Implementation in asm_s390x.s.
//go:noescape
func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) {
if cpu.S390X.HasVX {
xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter)
} else {
c.xorKeyStreamBlocksGeneric(dst, src)
}
}

40
vendor/golang.org/x/crypto/internal/chacha20/chacha_s390x.s → vendor/golang.org/x/crypto/chacha20/chacha_s390x.s generated vendored
View File

@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build s390x,!gccgo,!appengine
// +build !gccgo,!purego
#include "go_asm.h"
#include "textflag.h"
@@ -24,15 +24,6 @@ DATA ·constants<>+0x14(SB)/4, $0x3320646e
DATA ·constants<>+0x18(SB)/4, $0x79622d32
DATA ·constants<>+0x1c(SB)/4, $0x6b206574
// EXRL targets:
TEXT ·mvcSrcToBuf(SB), NOFRAME|NOSPLIT, $0
MVC $1, (R1), (R8)
RET
TEXT ·mvcBufToDst(SB), NOFRAME|NOSPLIT, $0
MVC $1, (R8), (R9)
RET
#define BSWAP V5
#define J0 V6
#define KEY0 V7
@@ -144,7 +135,7 @@ TEXT ·mvcBufToDst(SB), NOFRAME|NOSPLIT, $0
VMRHF v, w, c \ // c = {a[2], b[2], c[2], d[2]}
VMRLF v, w, d // d = {a[3], b[3], c[3], d[3]}
// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32, buf *[256]byte, len *int)
// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0
MOVD $·constants<>(SB), R1
MOVD dst+0(FP), R2 // R2=&dst[0]
@@ -152,25 +143,10 @@ TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0
MOVD key+48(FP), R5 // R5=key
MOVD nonce+56(FP), R6 // R6=nonce
MOVD counter+64(FP), R7 // R7=counter
MOVD buf+72(FP), R8 // R8=buf
MOVD len+80(FP), R9 // R9=len
// load BSWAP and J0
VLM (R1), BSWAP, J0
// set up tail buffer
ADD $-1, R4, R12
MOVBZ R12, R12
CMPUBEQ R12, $255, aligned
MOVD R4, R1
AND $~255, R1
MOVD $(R3)(R1*1), R1
EXRL $·mvcSrcToBuf(SB), R12
MOVD $255, R0
SUB R12, R0
MOVD R0, (R9) // update len
aligned:
// setup
MOVD $95, R0
VLM (R5), KEY0, KEY1
@@ -217,9 +193,7 @@ loop:
// decrement length
ADD $-256, R4
BLT tail
continue:
// rearrange vectors
SHUFFLE(X0, X1, X2, X3, M0, M1, M2, M3)
ADDV(J0, X0, X1, X2, X3)
@@ -245,16 +219,6 @@ continue:
MOVD $256(R3), R3
CMPBNE R4, $0, chacha
CMPUBEQ R12, $255, return
EXRL $·mvcBufToDst(SB), R12 // len was updated during setup
return:
VSTEF $0, CTR, (R7)
RET
tail:
MOVD R2, R9
MOVD R8, R2
MOVD R8, R3
MOVD $0, R4
JMP continue

21
vendor/golang.org/x/crypto/internal/chacha20/xor.go → vendor/golang.org/x/crypto/chacha20/xor.go generated vendored
View File

@@ -4,9 +4,7 @@
package chacha20
import (
"runtime"
)
import "runtime"
// Platforms that have fast unaligned 32-bit little endian accesses.
const unaligned = runtime.GOARCH == "386" ||
@@ -15,10 +13,10 @@ const unaligned = runtime.GOARCH == "386" ||
runtime.GOARCH == "ppc64le" ||
runtime.GOARCH == "s390x"
// xor reads a little endian uint32 from src, XORs it with u and
// addXor reads a little endian uint32 from src, XORs it with (a + b) and
// places the result in little endian byte order in dst.
func xor(dst, src []byte, u uint32) {
_, _ = src[3], dst[3] // eliminate bounds checks
func addXor(dst, src []byte, a, b uint32) {
_, _ = src[3], dst[3] // bounds check elimination hint
if unaligned {
// The compiler should optimize this code into
// 32-bit unaligned little endian loads and stores.
@@ -29,15 +27,16 @@ func xor(dst, src []byte, u uint32) {
v |= uint32(src[1]) << 8
v |= uint32(src[2]) << 16
v |= uint32(src[3]) << 24
v ^= u
v ^= a + b
dst[0] = byte(v)
dst[1] = byte(v >> 8)
dst[2] = byte(v >> 16)
dst[3] = byte(v >> 24)
} else {
dst[0] = src[0] ^ byte(u)
dst[1] = src[1] ^ byte(u>>8)
dst[2] = src[2] ^ byte(u>>16)
dst[3] = src[3] ^ byte(u>>24)
a += b
dst[0] = src[0] ^ byte(a)
dst[1] = src[1] ^ byte(a>>8)
dst[2] = src[2] ^ byte(a>>16)
dst[3] = src[3] ^ byte(a>>24)
}
}

11
vendor/golang.org/x/crypto/cryptobyte/asn1.go generated vendored
View File

@@ -81,7 +81,7 @@ func (b *Builder) AddASN1BigInt(n *big.Int) {
for i := range bytes {
bytes[i] ^= 0xff
}
if bytes[0]&0x80 == 0 {
if len(bytes) == 0 || bytes[0]&0x80 == 0 {
c.add(0xff)
}
c.add(bytes...)
@@ -230,12 +230,12 @@ func (b *Builder) AddASN1(tag asn1.Tag, f BuilderContinuation) {
// String
// ReadASN1Boolean decodes an ASN.1 INTEGER and converts it to a boolean
// ReadASN1Boolean decodes an ASN.1 BOOLEAN and converts it to a boolean
// representation into out and advances. It reports whether the read
// was successful.
func (s *String) ReadASN1Boolean(out *bool) bool {
var bytes String
if !s.ReadASN1(&bytes, asn1.INTEGER) || len(bytes) != 1 {
if !s.ReadASN1(&bytes, asn1.BOOLEAN) || len(bytes) != 1 {
return false
}
@@ -470,7 +470,8 @@ func (s *String) ReadASN1GeneralizedTime(out *time.Time) bool {
// It reports whether the read was successful.
func (s *String) ReadASN1BitString(out *encoding_asn1.BitString) bool {
var bytes String
if !s.ReadASN1(&bytes, asn1.BIT_STRING) || len(bytes) == 0 {
if !s.ReadASN1(&bytes, asn1.BIT_STRING) || len(bytes) == 0 ||
len(bytes)*8/8 != len(bytes) {
return false
}
@@ -740,7 +741,7 @@ func (s *String) readASN1(out *String, outTag *asn1.Tag, skipHeader bool) bool {
length = headerLen + len32
}
if uint32(int(length)) != length || !s.ReadBytes((*[]byte)(out), int(length)) {
if int(length) < 0 || !s.ReadBytes((*[]byte)(out), int(length)) {
return false
}
if skipHeader && !out.Skip(int(headerLen)) {

7
vendor/golang.org/x/crypto/cryptobyte/string.go generated vendored
View File

@@ -24,7 +24,7 @@ type String []byte
// read advances a String by n bytes and returns them. If less than n bytes
// remain, it returns nil.
func (s *String) read(n int) []byte {
if len(*s) < n {
if len(*s) < n || n < 0 {
return nil
}
v := (*s)[:n]
@@ -105,11 +105,6 @@ func (s *String) readLengthPrefixed(lenLen int, outChild *String) bool {
length = length << 8
length = length | uint32(b)
}
if int(length) < 0 {
// This currently cannot overflow because we read uint24 at most, but check
// anyway in case that changes in the future.
return false
}
v := s.read(int(length))
if v == nil {
return false

897
vendor/golang.org/x/crypto/curve25519/curve25519.go generated vendored
View File

@@ -1,834 +1,95 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Copyright 2019 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.
// We have an implementation in amd64 assembly so this code is only run on
// non-amd64 platforms. The amd64 assembly does not support gccgo.
// +build !amd64 gccgo appengine
package curve25519
// Package curve25519 provides an implementation of the X25519 function, which
// performs scalar multiplication on the elliptic curve known as Curve25519.
// See RFC 7748.
package curve25519 // import "golang.org/x/crypto/curve25519"
import (
"encoding/binary"
"crypto/subtle"
"fmt"
)
// This code is a port of the public domain, "ref10" implementation of
// curve25519 from SUPERCOP 20130419 by D. J. Bernstein.
// ScalarMult sets dst to the product scalar * point.
//
// Deprecated: when provided a low-order point, ScalarMult will set dst to all
// zeroes, irrespective of the scalar. Instead, use the X25519 function, which
// will return an error.
func ScalarMult(dst, scalar, point *[32]byte) {
scalarMult(dst, scalar, point)
}
// fieldElement represents an element of the field GF(2^255 - 19). An element
// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on
// context.
type fieldElement [10]int32
// ScalarBaseMult sets dst to the product scalar * base where base is the
// standard generator.
//
// It is recommended to use the X25519 function with Basepoint instead, as
// copying into fixed size arrays can lead to unexpected bugs.
func ScalarBaseMult(dst, scalar *[32]byte) {
ScalarMult(dst, scalar, &basePoint)
}
func feZero(fe *fieldElement) {
for i := range fe {
fe[i] = 0
const (
// ScalarSize is the size of the scalar input to X25519.
ScalarSize = 32
// PointSize is the size of the point input to X25519.
PointSize = 32
)
// Basepoint is the canonical Curve25519 generator.
var Basepoint []byte
var basePoint = [32]byte{9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
func init() { Basepoint = basePoint[:] }
func checkBasepoint() {
if subtle.ConstantTimeCompare(Basepoint, []byte{
0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
}) != 1 {
panic("curve25519: global Basepoint value was modified")
}
}
func feOne(fe *fieldElement) {
feZero(fe)
fe[0] = 1
// X25519 returns the result of the scalar multiplication (scalar * point),
// according to RFC 7748, Section 5. scalar, point and the return value are
// slices of 32 bytes.
//
// scalar can be generated at random, for example with crypto/rand. point should
// be either Basepoint or the output of another X25519 call.
//
// If point is Basepoint (but not if it's a different slice with the same
// contents) a precomputed implementation might be used for performance.
func X25519(scalar, point []byte) ([]byte, error) {
// Outline the body of function, to let the allocation be inlined in the
// caller, and possibly avoid escaping to the heap.
var dst [32]byte
return x25519(&dst, scalar, point)
}
func feAdd(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] + b[i]
func x25519(dst *[32]byte, scalar, point []byte) ([]byte, error) {
var in [32]byte
if l := len(scalar); l != 32 {
return nil, fmt.Errorf("bad scalar length: %d, expected %d", l, 32)
}
}
func feSub(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] - b[i]
}
}
func feCopy(dst, src *fieldElement) {
for i := range dst {
dst[i] = src[i]
}
}
// feCSwap replaces (f,g) with (g,f) if b == 1; replaces (f,g) with (f,g) if b == 0.
//
// Preconditions: b in {0,1}.
func feCSwap(f, g *fieldElement, b int32) {
b = -b
for i := range f {
t := b & (f[i] ^ g[i])
f[i] ^= t
g[i] ^= t
}
}
// load3 reads a 24-bit, little-endian value from in.
func load3(in []byte) int64 {
var r int64
r = int64(in[0])
r |= int64(in[1]) << 8
r |= int64(in[2]) << 16
return r
}
// load4 reads a 32-bit, little-endian value from in.
func load4(in []byte) int64 {
return int64(binary.LittleEndian.Uint32(in))
}
func feFromBytes(dst *fieldElement, src *[32]byte) {
h0 := load4(src[:])
h1 := load3(src[4:]) << 6
h2 := load3(src[7:]) << 5
h3 := load3(src[10:]) << 3
h4 := load3(src[13:]) << 2
h5 := load4(src[16:])
h6 := load3(src[20:]) << 7
h7 := load3(src[23:]) << 5
h8 := load3(src[26:]) << 4
h9 := (load3(src[29:]) & 0x7fffff) << 2
var carry [10]int64
carry[9] = (h9 + 1<<24) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + 1<<24) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + 1<<24) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + 1<<24) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + 1<<24) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + 1<<25) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + 1<<25) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + 1<<25) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + 1<<25) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + 1<<25) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
dst[0] = int32(h0)
dst[1] = int32(h1)
dst[2] = int32(h2)
dst[3] = int32(h3)
dst[4] = int32(h4)
dst[5] = int32(h5)
dst[6] = int32(h6)
dst[7] = int32(h7)
dst[8] = int32(h8)
dst[9] = int32(h9)
}
// feToBytes marshals h to s.
// Preconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Write p=2^255-19; q=floor(h/p).
// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))).
//
// Proof:
// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4.
// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4.
//
// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9).
// Then 0<y<1.
//
// Write r=h-pq.
// Have 0<=r<=p-1=2^255-20.
// Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1.
//
// Write x=r+19(2^-255)r+y.
// Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q.
//
// Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1))
// so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q.
func feToBytes(s *[32]byte, h *fieldElement) {
var carry [10]int32
q := (19*h[9] + (1 << 24)) >> 25
q = (h[0] + q) >> 26
q = (h[1] + q) >> 25
q = (h[2] + q) >> 26
q = (h[3] + q) >> 25
q = (h[4] + q) >> 26
q = (h[5] + q) >> 25
q = (h[6] + q) >> 26
q = (h[7] + q) >> 25
q = (h[8] + q) >> 26
q = (h[9] + q) >> 25
// Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20.
h[0] += 19 * q
// Goal: Output h-2^255 q, which is between 0 and 2^255-20.
carry[0] = h[0] >> 26
h[1] += carry[0]
h[0] -= carry[0] << 26
carry[1] = h[1] >> 25
h[2] += carry[1]
h[1] -= carry[1] << 25
carry[2] = h[2] >> 26
h[3] += carry[2]
h[2] -= carry[2] << 26
carry[3] = h[3] >> 25
h[4] += carry[3]
h[3] -= carry[3] << 25
carry[4] = h[4] >> 26
h[5] += carry[4]
h[4] -= carry[4] << 26
carry[5] = h[5] >> 25
h[6] += carry[5]
h[5] -= carry[5] << 25
carry[6] = h[6] >> 26
h[7] += carry[6]
h[6] -= carry[6] << 26
carry[7] = h[7] >> 25
h[8] += carry[7]
h[7] -= carry[7] << 25
carry[8] = h[8] >> 26
h[9] += carry[8]
h[8] -= carry[8] << 26
carry[9] = h[9] >> 25
h[9] -= carry[9] << 25
// h10 = carry9
// Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20.
// Have h[0]+...+2^230 h[9] between 0 and 2^255-1;
// evidently 2^255 h10-2^255 q = 0.
// Goal: Output h[0]+...+2^230 h[9].
s[0] = byte(h[0] >> 0)
s[1] = byte(h[0] >> 8)
s[2] = byte(h[0] >> 16)
s[3] = byte((h[0] >> 24) | (h[1] << 2))
s[4] = byte(h[1] >> 6)
s[5] = byte(h[1] >> 14)
s[6] = byte((h[1] >> 22) | (h[2] << 3))
s[7] = byte(h[2] >> 5)
s[8] = byte(h[2] >> 13)
s[9] = byte((h[2] >> 21) | (h[3] << 5))
s[10] = byte(h[3] >> 3)
s[11] = byte(h[3] >> 11)
s[12] = byte((h[3] >> 19) | (h[4] << 6))
s[13] = byte(h[4] >> 2)
s[14] = byte(h[4] >> 10)
s[15] = byte(h[4] >> 18)
s[16] = byte(h[5] >> 0)
s[17] = byte(h[5] >> 8)
s[18] = byte(h[5] >> 16)
s[19] = byte((h[5] >> 24) | (h[6] << 1))
s[20] = byte(h[6] >> 7)
s[21] = byte(h[6] >> 15)
s[22] = byte((h[6] >> 23) | (h[7] << 3))
s[23] = byte(h[7] >> 5)
s[24] = byte(h[7] >> 13)
s[25] = byte((h[7] >> 21) | (h[8] << 4))
s[26] = byte(h[8] >> 4)
s[27] = byte(h[8] >> 12)
s[28] = byte((h[8] >> 20) | (h[9] << 6))
s[29] = byte(h[9] >> 2)
s[30] = byte(h[9] >> 10)
s[31] = byte(h[9] >> 18)
}
// feMul calculates h = f * g
// Can overlap h with f or g.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Notes on implementation strategy:
//
// Using schoolbook multiplication.
// Karatsuba would save a little in some cost models.
//
// Most multiplications by 2 and 19 are 32-bit precomputations;
// cheaper than 64-bit postcomputations.
//
// There is one remaining multiplication by 19 in the carry chain;
// one *19 precomputation can be merged into this,
// but the resulting data flow is considerably less clean.
//
// There are 12 carries below.
// 10 of them are 2-way parallelizable and vectorizable.
// Can get away with 11 carries, but then data flow is much deeper.
//
// With tighter constraints on inputs can squeeze carries into int32.
func feMul(h, f, g *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
g0 := g[0]
g1 := g[1]
g2 := g[2]
g3 := g[3]
g4 := g[4]
g5 := g[5]
g6 := g[6]
g7 := g[7]
g8 := g[8]
g9 := g[9]
g1_19 := 19 * g1 // 1.4*2^29
g2_19 := 19 * g2 // 1.4*2^30; still ok
g3_19 := 19 * g3
g4_19 := 19 * g4
g5_19 := 19 * g5
g6_19 := 19 * g6
g7_19 := 19 * g7
g8_19 := 19 * g8
g9_19 := 19 * g9
f1_2 := 2 * f1
f3_2 := 2 * f3
f5_2 := 2 * f5
f7_2 := 2 * f7
f9_2 := 2 * f9
f0g0 := int64(f0) * int64(g0)
f0g1 := int64(f0) * int64(g1)
f0g2 := int64(f0) * int64(g2)
f0g3 := int64(f0) * int64(g3)
f0g4 := int64(f0) * int64(g4)
f0g5 := int64(f0) * int64(g5)
f0g6 := int64(f0) * int64(g6)
f0g7 := int64(f0) * int64(g7)
f0g8 := int64(f0) * int64(g8)
f0g9 := int64(f0) * int64(g9)
f1g0 := int64(f1) * int64(g0)
f1g1_2 := int64(f1_2) * int64(g1)
f1g2 := int64(f1) * int64(g2)
f1g3_2 := int64(f1_2) * int64(g3)
f1g4 := int64(f1) * int64(g4)
f1g5_2 := int64(f1_2) * int64(g5)
f1g6 := int64(f1) * int64(g6)
f1g7_2 := int64(f1_2) * int64(g7)
f1g8 := int64(f1) * int64(g8)
f1g9_38 := int64(f1_2) * int64(g9_19)
f2g0 := int64(f2) * int64(g0)
f2g1 := int64(f2) * int64(g1)
f2g2 := int64(f2) * int64(g2)
f2g3 := int64(f2) * int64(g3)
f2g4 := int64(f2) * int64(g4)
f2g5 := int64(f2) * int64(g5)
f2g6 := int64(f2) * int64(g6)
f2g7 := int64(f2) * int64(g7)
f2g8_19 := int64(f2) * int64(g8_19)
f2g9_19 := int64(f2) * int64(g9_19)
f3g0 := int64(f3) * int64(g0)
f3g1_2 := int64(f3_2) * int64(g1)
f3g2 := int64(f3) * int64(g2)
f3g3_2 := int64(f3_2) * int64(g3)
f3g4 := int64(f3) * int64(g4)
f3g5_2 := int64(f3_2) * int64(g5)
f3g6 := int64(f3) * int64(g6)
f3g7_38 := int64(f3_2) * int64(g7_19)
f3g8_19 := int64(f3) * int64(g8_19)
f3g9_38 := int64(f3_2) * int64(g9_19)
f4g0 := int64(f4) * int64(g0)
f4g1 := int64(f4) * int64(g1)
f4g2 := int64(f4) * int64(g2)
f4g3 := int64(f4) * int64(g3)
f4g4 := int64(f4) * int64(g4)
f4g5 := int64(f4) * int64(g5)
f4g6_19 := int64(f4) * int64(g6_19)
f4g7_19 := int64(f4) * int64(g7_19)
f4g8_19 := int64(f4) * int64(g8_19)
f4g9_19 := int64(f4) * int64(g9_19)
f5g0 := int64(f5) * int64(g0)
f5g1_2 := int64(f5_2) * int64(g1)
f5g2 := int64(f5) * int64(g2)
f5g3_2 := int64(f5_2) * int64(g3)
f5g4 := int64(f5) * int64(g4)
f5g5_38 := int64(f5_2) * int64(g5_19)
f5g6_19 := int64(f5) * int64(g6_19)
f5g7_38 := int64(f5_2) * int64(g7_19)
f5g8_19 := int64(f5) * int64(g8_19)
f5g9_38 := int64(f5_2) * int64(g9_19)
f6g0 := int64(f6) * int64(g0)
f6g1 := int64(f6) * int64(g1)
f6g2 := int64(f6) * int64(g2)
f6g3 := int64(f6) * int64(g3)
f6g4_19 := int64(f6) * int64(g4_19)
f6g5_19 := int64(f6) * int64(g5_19)
f6g6_19 := int64(f6) * int64(g6_19)
f6g7_19 := int64(f6) * int64(g7_19)
f6g8_19 := int64(f6) * int64(g8_19)
f6g9_19 := int64(f6) * int64(g9_19)
f7g0 := int64(f7) * int64(g0)
f7g1_2 := int64(f7_2) * int64(g1)
f7g2 := int64(f7) * int64(g2)
f7g3_38 := int64(f7_2) * int64(g3_19)
f7g4_19 := int64(f7) * int64(g4_19)
f7g5_38 := int64(f7_2) * int64(g5_19)
f7g6_19 := int64(f7) * int64(g6_19)
f7g7_38 := int64(f7_2) * int64(g7_19)
f7g8_19 := int64(f7) * int64(g8_19)
f7g9_38 := int64(f7_2) * int64(g9_19)
f8g0 := int64(f8) * int64(g0)
f8g1 := int64(f8) * int64(g1)
f8g2_19 := int64(f8) * int64(g2_19)
f8g3_19 := int64(f8) * int64(g3_19)
f8g4_19 := int64(f8) * int64(g4_19)
f8g5_19 := int64(f8) * int64(g5_19)
f8g6_19 := int64(f8) * int64(g6_19)
f8g7_19 := int64(f8) * int64(g7_19)
f8g8_19 := int64(f8) * int64(g8_19)
f8g9_19 := int64(f8) * int64(g9_19)
f9g0 := int64(f9) * int64(g0)
f9g1_38 := int64(f9_2) * int64(g1_19)
f9g2_19 := int64(f9) * int64(g2_19)
f9g3_38 := int64(f9_2) * int64(g3_19)
f9g4_19 := int64(f9) * int64(g4_19)
f9g5_38 := int64(f9_2) * int64(g5_19)
f9g6_19 := int64(f9) * int64(g6_19)
f9g7_38 := int64(f9_2) * int64(g7_19)
f9g8_19 := int64(f9) * int64(g8_19)
f9g9_38 := int64(f9_2) * int64(g9_19)
h0 := f0g0 + f1g9_38 + f2g8_19 + f3g7_38 + f4g6_19 + f5g5_38 + f6g4_19 + f7g3_38 + f8g2_19 + f9g1_38
h1 := f0g1 + f1g0 + f2g9_19 + f3g8_19 + f4g7_19 + f5g6_19 + f6g5_19 + f7g4_19 + f8g3_19 + f9g2_19
h2 := f0g2 + f1g1_2 + f2g0 + f3g9_38 + f4g8_19 + f5g7_38 + f6g6_19 + f7g5_38 + f8g4_19 + f9g3_38
h3 := f0g3 + f1g2 + f2g1 + f3g0 + f4g9_19 + f5g8_19 + f6g7_19 + f7g6_19 + f8g5_19 + f9g4_19
h4 := f0g4 + f1g3_2 + f2g2 + f3g1_2 + f4g0 + f5g9_38 + f6g8_19 + f7g7_38 + f8g6_19 + f9g5_38
h5 := f0g5 + f1g4 + f2g3 + f3g2 + f4g1 + f5g0 + f6g9_19 + f7g8_19 + f8g7_19 + f9g6_19
h6 := f0g6 + f1g5_2 + f2g4 + f3g3_2 + f4g2 + f5g1_2 + f6g0 + f7g9_38 + f8g8_19 + f9g7_38
h7 := f0g7 + f1g6 + f2g5 + f3g4 + f4g3 + f5g2 + f6g1 + f7g0 + f8g9_19 + f9g8_19
h8 := f0g8 + f1g7_2 + f2g6 + f3g5_2 + f4g4 + f5g3_2 + f6g2 + f7g1_2 + f8g0 + f9g9_38
h9 := f0g9 + f1g8 + f2g7 + f3g6 + f4g5 + f5g4 + f6g3 + f7g2 + f8g1 + f9g0
var carry [10]int64
// |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38))
// i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8
// |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19))
// i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
// |h0| <= 2^25
// |h4| <= 2^25
// |h1| <= 1.51*2^58
// |h5| <= 1.51*2^58
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
// |h1| <= 2^24; from now on fits into int32
// |h5| <= 2^24; from now on fits into int32
// |h2| <= 1.21*2^59
// |h6| <= 1.21*2^59
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
// |h2| <= 2^25; from now on fits into int32 unchanged
// |h6| <= 2^25; from now on fits into int32 unchanged
// |h3| <= 1.51*2^58
// |h7| <= 1.51*2^58
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
// |h3| <= 2^24; from now on fits into int32 unchanged
// |h7| <= 2^24; from now on fits into int32 unchanged
// |h4| <= 1.52*2^33
// |h8| <= 1.52*2^33
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
// |h4| <= 2^25; from now on fits into int32 unchanged
// |h8| <= 2^25; from now on fits into int32 unchanged
// |h5| <= 1.01*2^24
// |h9| <= 1.51*2^58
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
// |h9| <= 2^24; from now on fits into int32 unchanged
// |h0| <= 1.8*2^37
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
// |h0| <= 2^25; from now on fits into int32 unchanged
// |h1| <= 1.01*2^24
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feSquare calculates h = f*f. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feSquare(h, f *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
f0_2 := 2 * f0
f1_2 := 2 * f1
f2_2 := 2 * f2
f3_2 := 2 * f3
f4_2 := 2 * f4
f5_2 := 2 * f5
f6_2 := 2 * f6
f7_2 := 2 * f7
f5_38 := 38 * f5 // 1.31*2^30
f6_19 := 19 * f6 // 1.31*2^30
f7_38 := 38 * f7 // 1.31*2^30
f8_19 := 19 * f8 // 1.31*2^30
f9_38 := 38 * f9 // 1.31*2^30
f0f0 := int64(f0) * int64(f0)
f0f1_2 := int64(f0_2) * int64(f1)
f0f2_2 := int64(f0_2) * int64(f2)
f0f3_2 := int64(f0_2) * int64(f3)
f0f4_2 := int64(f0_2) * int64(f4)
f0f5_2 := int64(f0_2) * int64(f5)
f0f6_2 := int64(f0_2) * int64(f6)
f0f7_2 := int64(f0_2) * int64(f7)
f0f8_2 := int64(f0_2) * int64(f8)
f0f9_2 := int64(f0_2) * int64(f9)
f1f1_2 := int64(f1_2) * int64(f1)
f1f2_2 := int64(f1_2) * int64(f2)
f1f3_4 := int64(f1_2) * int64(f3_2)
f1f4_2 := int64(f1_2) * int64(f4)
f1f5_4 := int64(f1_2) * int64(f5_2)
f1f6_2 := int64(f1_2) * int64(f6)
f1f7_4 := int64(f1_2) * int64(f7_2)
f1f8_2 := int64(f1_2) * int64(f8)
f1f9_76 := int64(f1_2) * int64(f9_38)
f2f2 := int64(f2) * int64(f2)
f2f3_2 := int64(f2_2) * int64(f3)
f2f4_2 := int64(f2_2) * int64(f4)
f2f5_2 := int64(f2_2) * int64(f5)
f2f6_2 := int64(f2_2) * int64(f6)
f2f7_2 := int64(f2_2) * int64(f7)
f2f8_38 := int64(f2_2) * int64(f8_19)
f2f9_38 := int64(f2) * int64(f9_38)
f3f3_2 := int64(f3_2) * int64(f3)
f3f4_2 := int64(f3_2) * int64(f4)
f3f5_4 := int64(f3_2) * int64(f5_2)
f3f6_2 := int64(f3_2) * int64(f6)
f3f7_76 := int64(f3_2) * int64(f7_38)
f3f8_38 := int64(f3_2) * int64(f8_19)
f3f9_76 := int64(f3_2) * int64(f9_38)
f4f4 := int64(f4) * int64(f4)
f4f5_2 := int64(f4_2) * int64(f5)
f4f6_38 := int64(f4_2) * int64(f6_19)
f4f7_38 := int64(f4) * int64(f7_38)
f4f8_38 := int64(f4_2) * int64(f8_19)
f4f9_38 := int64(f4) * int64(f9_38)
f5f5_38 := int64(f5) * int64(f5_38)
f5f6_38 := int64(f5_2) * int64(f6_19)
f5f7_76 := int64(f5_2) * int64(f7_38)
f5f8_38 := int64(f5_2) * int64(f8_19)
f5f9_76 := int64(f5_2) * int64(f9_38)
f6f6_19 := int64(f6) * int64(f6_19)
f6f7_38 := int64(f6) * int64(f7_38)
f6f8_38 := int64(f6_2) * int64(f8_19)
f6f9_38 := int64(f6) * int64(f9_38)
f7f7_38 := int64(f7) * int64(f7_38)
f7f8_38 := int64(f7_2) * int64(f8_19)
f7f9_76 := int64(f7_2) * int64(f9_38)
f8f8_19 := int64(f8) * int64(f8_19)
f8f9_38 := int64(f8) * int64(f9_38)
f9f9_38 := int64(f9) * int64(f9_38)
h0 := f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38
h1 := f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38
h2 := f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19
h3 := f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38
h4 := f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38
h5 := f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38
h6 := f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19
h7 := f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38
h8 := f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38
h9 := f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2
var carry [10]int64
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feMul121666 calculates h = f * 121666. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feMul121666(h, f *fieldElement) {
h0 := int64(f[0]) * 121666
h1 := int64(f[1]) * 121666
h2 := int64(f[2]) * 121666
h3 := int64(f[3]) * 121666
h4 := int64(f[4]) * 121666
h5 := int64(f[5]) * 121666
h6 := int64(f[6]) * 121666
h7 := int64(f[7]) * 121666
h8 := int64(f[8]) * 121666
h9 := int64(f[9]) * 121666
var carry [10]int64
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feInvert sets out = z^-1.
func feInvert(out, z *fieldElement) {
var t0, t1, t2, t3 fieldElement
var i int
feSquare(&t0, z)
for i = 1; i < 1; i++ {
feSquare(&t0, &t0)
}
feSquare(&t1, &t0)
for i = 1; i < 2; i++ {
feSquare(&t1, &t1)
}
feMul(&t1, z, &t1)
feMul(&t0, &t0, &t1)
feSquare(&t2, &t0)
for i = 1; i < 1; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t1, &t2)
feSquare(&t2, &t1)
for i = 1; i < 5; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 20; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 100; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t1, &t1)
for i = 1; i < 5; i++ {
feSquare(&t1, &t1)
}
feMul(out, &t1, &t0)
}
func scalarMult(out, in, base *[32]byte) {
var e [32]byte
copy(e[:], in[:])
e[0] &= 248
e[31] &= 127
e[31] |= 64
var x1, x2, z2, x3, z3, tmp0, tmp1 fieldElement
feFromBytes(&x1, base)
feOne(&x2)
feCopy(&x3, &x1)
feOne(&z3)
swap := int32(0)
for pos := 254; pos >= 0; pos-- {
b := e[pos/8] >> uint(pos&7)
b &= 1
swap ^= int32(b)
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
swap = int32(b)
feSub(&tmp0, &x3, &z3)
feSub(&tmp1, &x2, &z2)
feAdd(&x2, &x2, &z2)
feAdd(&z2, &x3, &z3)
feMul(&z3, &tmp0, &x2)
feMul(&z2, &z2, &tmp1)
feSquare(&tmp0, &tmp1)
feSquare(&tmp1, &x2)
feAdd(&x3, &z3, &z2)
feSub(&z2, &z3, &z2)
feMul(&x2, &tmp1, &tmp0)
feSub(&tmp1, &tmp1, &tmp0)
feSquare(&z2, &z2)
feMul121666(&z3, &tmp1)
feSquare(&x3, &x3)
feAdd(&tmp0, &tmp0, &z3)
feMul(&z3, &x1, &z2)
feMul(&z2, &tmp1, &tmp0)
}
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
feInvert(&z2, &z2)
feMul(&x2, &x2, &z2)
feToBytes(out, &x2)
if l := len(point); l != 32 {
return nil, fmt.Errorf("bad point length: %d, expected %d", l, 32)
}
copy(in[:], scalar)
if &point[0] == &Basepoint[0] {
checkBasepoint()
ScalarBaseMult(dst, &in)
} else {
var base, zero [32]byte
copy(base[:], point)
ScalarMult(dst, &in, &base)
if subtle.ConstantTimeCompare(dst[:], zero[:]) == 1 {
return nil, fmt.Errorf("bad input point: low order point")
}
}
return dst[:], nil
}

2
vendor/golang.org/x/crypto/curve25519/mont25519_amd64.go → vendor/golang.org/x/crypto/curve25519/curve25519_amd64.go generated vendored
View File

@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine
// +build amd64,!gccgo,!appengine,!purego
package curve25519

510
vendor/golang.org/x/crypto/curve25519/ladderstep_amd64.s → vendor/golang.org/x/crypto/curve25519/curve25519_amd64.s generated vendored
View File

@@ -5,9 +5,84 @@
// This code was translated into a form compatible with 6a from the public
// domain sources in SUPERCOP: https://bench.cr.yp.to/supercop.html
// +build amd64,!gccgo,!appengine
// +build amd64,!gccgo,!appengine,!purego
#include "const_amd64.h"
#define REDMASK51 0x0007FFFFFFFFFFFF
// These constants cannot be encoded in non-MOVQ immediates.
// We access them directly from memory instead.
DATA ·_121666_213(SB)/8, $996687872
GLOBL ·_121666_213(SB), 8, $8
DATA ·_2P0(SB)/8, $0xFFFFFFFFFFFDA
GLOBL ·_2P0(SB), 8, $8
DATA ·_2P1234(SB)/8, $0xFFFFFFFFFFFFE
GLOBL ·_2P1234(SB), 8, $8
// func freeze(inout *[5]uint64)
TEXT ·freeze(SB),7,$0-8
MOVQ inout+0(FP), DI
MOVQ 0(DI),SI
MOVQ 8(DI),DX
MOVQ 16(DI),CX
MOVQ 24(DI),R8
MOVQ 32(DI),R9
MOVQ $REDMASK51,AX
MOVQ AX,R10
SUBQ $18,R10
MOVQ $3,R11
REDUCELOOP:
MOVQ SI,R12
SHRQ $51,R12
ANDQ AX,SI
ADDQ R12,DX
MOVQ DX,R12
SHRQ $51,R12
ANDQ AX,DX
ADDQ R12,CX
MOVQ CX,R12
SHRQ $51,R12
ANDQ AX,CX
ADDQ R12,R8
MOVQ R8,R12
SHRQ $51,R12
ANDQ AX,R8
ADDQ R12,R9
MOVQ R9,R12
SHRQ $51,R12
ANDQ AX,R9
IMUL3Q $19,R12,R12
ADDQ R12,SI
SUBQ $1,R11
JA REDUCELOOP
MOVQ $1,R12
CMPQ R10,SI
CMOVQLT R11,R12
CMPQ AX,DX
CMOVQNE R11,R12
CMPQ AX,CX
CMOVQNE R11,R12
CMPQ AX,R8
CMOVQNE R11,R12
CMPQ AX,R9
CMOVQNE R11,R12
NEGQ R12
ANDQ R12,AX
ANDQ R12,R10
SUBQ R10,SI
SUBQ AX,DX
SUBQ AX,CX
SUBQ AX,R8
SUBQ AX,R9
MOVQ SI,0(DI)
MOVQ DX,8(DI)
MOVQ CX,16(DI)
MOVQ R8,24(DI)
MOVQ R9,32(DI)
RET
// func ladderstep(inout *[5][5]uint64)
TEXT ·ladderstep(SB),0,$296-8
@@ -121,18 +196,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -236,18 +311,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -441,18 +516,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -591,18 +666,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -731,18 +806,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -846,18 +921,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -996,18 +1071,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -1146,18 +1221,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -1332,18 +1407,18 @@ TEXT ·ladderstep(SB),0,$296-8
ADDQ AX,R12
ADCQ DX,R13
MOVQ $REDMASK51,DX
SHLQ $13,CX:SI
SHLQ $13,SI,CX
ANDQ DX,SI
SHLQ $13,R9:R8
SHLQ $13,R8,R9
ANDQ DX,R8
ADDQ CX,R8
SHLQ $13,R11:R10
SHLQ $13,R10,R11
ANDQ DX,R10
ADDQ R9,R10
SHLQ $13,R13:R12
SHLQ $13,R12,R13
ANDQ DX,R12
ADDQ R11,R12
SHLQ $13,R15:R14
SHLQ $13,R14,R15
ANDQ DX,R14
ADDQ R13,R14
IMUL3Q $19,R15,CX
@@ -1375,3 +1450,344 @@ TEXT ·ladderstep(SB),0,$296-8
MOVQ AX,104(DI)
MOVQ R10,112(DI)
RET
// func cswap(inout *[4][5]uint64, v uint64)
TEXT ·cswap(SB),7,$0
MOVQ inout+0(FP),DI
MOVQ v+8(FP),SI
SUBQ $1, SI
NOTQ SI
MOVQ SI, X15
PSHUFD $0x44, X15, X15
MOVOU 0(DI), X0
MOVOU 16(DI), X2
MOVOU 32(DI), X4
MOVOU 48(DI), X6
MOVOU 64(DI), X8
MOVOU 80(DI), X1
MOVOU 96(DI), X3
MOVOU 112(DI), X5
MOVOU 128(DI), X7
MOVOU 144(DI), X9
MOVO X1, X10
MOVO X3, X11
MOVO X5, X12
MOVO X7, X13
MOVO X9, X14
PXOR X0, X10
PXOR X2, X11
PXOR X4, X12
PXOR X6, X13
PXOR X8, X14
PAND X15, X10
PAND X15, X11
PAND X15, X12
PAND X15, X13
PAND X15, X14
PXOR X10, X0
PXOR X10, X1
PXOR X11, X2
PXOR X11, X3
PXOR X12, X4
PXOR X12, X5
PXOR X13, X6
PXOR X13, X7
PXOR X14, X8
PXOR X14, X9
MOVOU X0, 0(DI)
MOVOU X2, 16(DI)
MOVOU X4, 32(DI)
MOVOU X6, 48(DI)
MOVOU X8, 64(DI)
MOVOU X1, 80(DI)
MOVOU X3, 96(DI)
MOVOU X5, 112(DI)
MOVOU X7, 128(DI)
MOVOU X9, 144(DI)
RET
// func mul(dest, a, b *[5]uint64)
TEXT ·mul(SB),0,$16-24
MOVQ dest+0(FP), DI
MOVQ a+8(FP), SI
MOVQ b+16(FP), DX
MOVQ DX,CX
MOVQ 24(SI),DX
IMUL3Q $19,DX,AX
MOVQ AX,0(SP)
MULQ 16(CX)
MOVQ AX,R8
MOVQ DX,R9
MOVQ 32(SI),DX
IMUL3Q $19,DX,AX
MOVQ AX,8(SP)
MULQ 8(CX)
ADDQ AX,R8
ADCQ DX,R9
MOVQ 0(SI),AX
MULQ 0(CX)
ADDQ AX,R8
ADCQ DX,R9
MOVQ 0(SI),AX
MULQ 8(CX)
MOVQ AX,R10
MOVQ DX,R11
MOVQ 0(SI),AX
MULQ 16(CX)
MOVQ AX,R12
MOVQ DX,R13
MOVQ 0(SI),AX
MULQ 24(CX)
MOVQ AX,R14
MOVQ DX,R15
MOVQ 0(SI),AX
MULQ 32(CX)
MOVQ AX,BX
MOVQ DX,BP
MOVQ 8(SI),AX
MULQ 0(CX)
ADDQ AX,R10
ADCQ DX,R11
MOVQ 8(SI),AX
MULQ 8(CX)
ADDQ AX,R12
ADCQ DX,R13
MOVQ 8(SI),AX
MULQ 16(CX)
ADDQ AX,R14
ADCQ DX,R15
MOVQ 8(SI),AX
MULQ 24(CX)
ADDQ AX,BX
ADCQ DX,BP
MOVQ 8(SI),DX
IMUL3Q $19,DX,AX
MULQ 32(CX)
ADDQ AX,R8
ADCQ DX,R9
MOVQ 16(SI),AX
MULQ 0(CX)
ADDQ AX,R12
ADCQ DX,R13
MOVQ 16(SI),AX
MULQ 8(CX)
ADDQ AX,R14
ADCQ DX,R15
MOVQ 16(SI),AX
MULQ 16(CX)
ADDQ AX,BX
ADCQ DX,BP
MOVQ 16(SI),DX
IMUL3Q $19,DX,AX
MULQ 24(CX)
ADDQ AX,R8
ADCQ DX,R9
MOVQ 16(SI),DX
IMUL3Q $19,DX,AX
MULQ 32(CX)
ADDQ AX,R10
ADCQ DX,R11
MOVQ 24(SI),AX
MULQ 0(CX)
ADDQ AX,R14
ADCQ DX,R15
MOVQ 24(SI),AX
MULQ 8(CX)
ADDQ AX,BX
ADCQ DX,BP
MOVQ 0(SP),AX
MULQ 24(CX)
ADDQ AX,R10
ADCQ DX,R11
MOVQ 0(SP),AX
MULQ 32(CX)
ADDQ AX,R12
ADCQ DX,R13
MOVQ 32(SI),AX
MULQ 0(CX)
ADDQ AX,BX
ADCQ DX,BP
MOVQ 8(SP),AX
MULQ 16(CX)
ADDQ AX,R10
ADCQ DX,R11
MOVQ 8(SP),AX
MULQ 24(CX)
ADDQ AX,R12
ADCQ DX,R13
MOVQ 8(SP),AX
MULQ 32(CX)
ADDQ AX,R14
ADCQ DX,R15
MOVQ $REDMASK51,SI
SHLQ $13,R8,R9
ANDQ SI,R8
SHLQ $13,R10,R11
ANDQ SI,R10
ADDQ R9,R10
SHLQ $13,R12,R13
ANDQ SI,R12
ADDQ R11,R12
SHLQ $13,R14,R15
ANDQ SI,R14
ADDQ R13,R14
SHLQ $13,BX,BP
ANDQ SI,BX
ADDQ R15,BX
IMUL3Q $19,BP,DX
ADDQ DX,R8
MOVQ R8,DX
SHRQ $51,DX
ADDQ R10,DX
MOVQ DX,CX
SHRQ $51,DX
ANDQ SI,R8
ADDQ R12,DX
MOVQ DX,R9
SHRQ $51,DX
ANDQ SI,CX
ADDQ R14,DX
MOVQ DX,AX
SHRQ $51,DX
ANDQ SI,R9
ADDQ BX,DX
MOVQ DX,R10
SHRQ $51,DX
ANDQ SI,AX
IMUL3Q $19,DX,DX
ADDQ DX,R8
ANDQ SI,R10
MOVQ R8,0(DI)
MOVQ CX,8(DI)
MOVQ R9,16(DI)
MOVQ AX,24(DI)
MOVQ R10,32(DI)
RET
// func square(out, in *[5]uint64)
TEXT ·square(SB),7,$0-16
MOVQ out+0(FP), DI
MOVQ in+8(FP), SI
MOVQ 0(SI),AX
MULQ 0(SI)
MOVQ AX,CX
MOVQ DX,R8
MOVQ 0(SI),AX
SHLQ $1,AX
MULQ 8(SI)
MOVQ AX,R9
MOVQ DX,R10
MOVQ 0(SI),AX
SHLQ $1,AX
MULQ 16(SI)
MOVQ AX,R11
MOVQ DX,R12
MOVQ 0(SI),AX
SHLQ $1,AX
MULQ 24(SI)
MOVQ AX,R13
MOVQ DX,R14
MOVQ 0(SI),AX
SHLQ $1,AX
MULQ 32(SI)
MOVQ AX,R15
MOVQ DX,BX
MOVQ 8(SI),AX
MULQ 8(SI)
ADDQ AX,R11
ADCQ DX,R12
MOVQ 8(SI),AX
SHLQ $1,AX
MULQ 16(SI)
ADDQ AX,R13
ADCQ DX,R14
MOVQ 8(SI),AX
SHLQ $1,AX
MULQ 24(SI)
ADDQ AX,R15
ADCQ DX,BX
MOVQ 8(SI),DX
IMUL3Q $38,DX,AX
MULQ 32(SI)
ADDQ AX,CX
ADCQ DX,R8
MOVQ 16(SI),AX
MULQ 16(SI)
ADDQ AX,R15
ADCQ DX,BX
MOVQ 16(SI),DX
IMUL3Q $38,DX,AX
MULQ 24(SI)
ADDQ AX,CX
ADCQ DX,R8
MOVQ 16(SI),DX
IMUL3Q $38,DX,AX
MULQ 32(SI)
ADDQ AX,R9
ADCQ DX,R10
MOVQ 24(SI),DX
IMUL3Q $19,DX,AX
MULQ 24(SI)
ADDQ AX,R9
ADCQ DX,R10
MOVQ 24(SI),DX
IMUL3Q $38,DX,AX
MULQ 32(SI)
ADDQ AX,R11
ADCQ DX,R12
MOVQ 32(SI),DX
IMUL3Q $19,DX,AX
MULQ 32(SI)
ADDQ AX,R13
ADCQ DX,R14
MOVQ $REDMASK51,SI
SHLQ $13,CX,R8
ANDQ SI,CX
SHLQ $13,R9,R10
ANDQ SI,R9
ADDQ R8,R9
SHLQ $13,R11,R12
ANDQ SI,R11
ADDQ R10,R11
SHLQ $13,R13,R14
ANDQ SI,R13
ADDQ R12,R13
SHLQ $13,R15,BX
ANDQ SI,R15
ADDQ R14,R15
IMUL3Q $19,BX,DX
ADDQ DX,CX
MOVQ CX,DX
SHRQ $51,DX
ADDQ R9,DX
ANDQ SI,CX
MOVQ DX,R8
SHRQ $51,DX
ADDQ R11,DX
ANDQ SI,R8
MOVQ DX,R9
SHRQ $51,DX
ADDQ R13,DX
ANDQ SI,R9
MOVQ DX,AX
SHRQ $51,DX
ADDQ R15,DX
ANDQ SI,AX
MOVQ DX,R10
SHRQ $51,DX
IMUL3Q $19,DX,DX
ADDQ DX,CX
ANDQ SI,R10
MOVQ CX,0(DI)
MOVQ R8,8(DI)
MOVQ R9,16(DI)
MOVQ AX,24(DI)
MOVQ R10,32(DI)
RET

828
vendor/golang.org/x/crypto/curve25519/curve25519_generic.go generated vendored Normal file
View File

@@ -0,0 +1,828 @@
// Copyright 2013 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 curve25519
import "encoding/binary"
// This code is a port of the public domain, "ref10" implementation of
// curve25519 from SUPERCOP 20130419 by D. J. Bernstein.
// fieldElement represents an element of the field GF(2^255 - 19). An element
// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on
// context.
type fieldElement [10]int32
func feZero(fe *fieldElement) {
for i := range fe {
fe[i] = 0
}
}
func feOne(fe *fieldElement) {
feZero(fe)
fe[0] = 1
}
func feAdd(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] + b[i]
}
}
func feSub(dst, a, b *fieldElement) {
for i := range dst {
dst[i] = a[i] - b[i]
}
}
func feCopy(dst, src *fieldElement) {
for i := range dst {
dst[i] = src[i]
}
}
// feCSwap replaces (f,g) with (g,f) if b == 1; replaces (f,g) with (f,g) if b == 0.
//
// Preconditions: b in {0,1}.
func feCSwap(f, g *fieldElement, b int32) {
b = -b
for i := range f {
t := b & (f[i] ^ g[i])
f[i] ^= t
g[i] ^= t
}
}
// load3 reads a 24-bit, little-endian value from in.
func load3(in []byte) int64 {
var r int64
r = int64(in[0])
r |= int64(in[1]) << 8
r |= int64(in[2]) << 16
return r
}
// load4 reads a 32-bit, little-endian value from in.
func load4(in []byte) int64 {
return int64(binary.LittleEndian.Uint32(in))
}
func feFromBytes(dst *fieldElement, src *[32]byte) {
h0 := load4(src[:])
h1 := load3(src[4:]) << 6
h2 := load3(src[7:]) << 5
h3 := load3(src[10:]) << 3
h4 := load3(src[13:]) << 2
h5 := load4(src[16:])
h6 := load3(src[20:]) << 7
h7 := load3(src[23:]) << 5
h8 := load3(src[26:]) << 4
h9 := (load3(src[29:]) & 0x7fffff) << 2
var carry [10]int64
carry[9] = (h9 + 1<<24) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + 1<<24) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + 1<<24) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + 1<<24) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + 1<<24) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + 1<<25) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + 1<<25) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + 1<<25) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + 1<<25) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + 1<<25) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
dst[0] = int32(h0)
dst[1] = int32(h1)
dst[2] = int32(h2)
dst[3] = int32(h3)
dst[4] = int32(h4)
dst[5] = int32(h5)
dst[6] = int32(h6)
dst[7] = int32(h7)
dst[8] = int32(h8)
dst[9] = int32(h9)
}
// feToBytes marshals h to s.
// Preconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Write p=2^255-19; q=floor(h/p).
// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))).
//
// Proof:
// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4.
// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4.
//
// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9).
// Then 0<y<1.
//
// Write r=h-pq.
// Have 0<=r<=p-1=2^255-20.
// Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1.
//
// Write x=r+19(2^-255)r+y.
// Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q.
//
// Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1))
// so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q.
func feToBytes(s *[32]byte, h *fieldElement) {
var carry [10]int32
q := (19*h[9] + (1 << 24)) >> 25
q = (h[0] + q) >> 26
q = (h[1] + q) >> 25
q = (h[2] + q) >> 26
q = (h[3] + q) >> 25
q = (h[4] + q) >> 26
q = (h[5] + q) >> 25
q = (h[6] + q) >> 26
q = (h[7] + q) >> 25
q = (h[8] + q) >> 26
q = (h[9] + q) >> 25
// Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20.
h[0] += 19 * q
// Goal: Output h-2^255 q, which is between 0 and 2^255-20.
carry[0] = h[0] >> 26
h[1] += carry[0]
h[0] -= carry[0] << 26
carry[1] = h[1] >> 25
h[2] += carry[1]
h[1] -= carry[1] << 25
carry[2] = h[2] >> 26
h[3] += carry[2]
h[2] -= carry[2] << 26
carry[3] = h[3] >> 25
h[4] += carry[3]
h[3] -= carry[3] << 25
carry[4] = h[4] >> 26
h[5] += carry[4]
h[4] -= carry[4] << 26
carry[5] = h[5] >> 25
h[6] += carry[5]
h[5] -= carry[5] << 25
carry[6] = h[6] >> 26
h[7] += carry[6]
h[6] -= carry[6] << 26
carry[7] = h[7] >> 25
h[8] += carry[7]
h[7] -= carry[7] << 25
carry[8] = h[8] >> 26
h[9] += carry[8]
h[8] -= carry[8] << 26
carry[9] = h[9] >> 25
h[9] -= carry[9] << 25
// h10 = carry9
// Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20.
// Have h[0]+...+2^230 h[9] between 0 and 2^255-1;
// evidently 2^255 h10-2^255 q = 0.
// Goal: Output h[0]+...+2^230 h[9].
s[0] = byte(h[0] >> 0)
s[1] = byte(h[0] >> 8)
s[2] = byte(h[0] >> 16)
s[3] = byte((h[0] >> 24) | (h[1] << 2))
s[4] = byte(h[1] >> 6)
s[5] = byte(h[1] >> 14)
s[6] = byte((h[1] >> 22) | (h[2] << 3))
s[7] = byte(h[2] >> 5)
s[8] = byte(h[2] >> 13)
s[9] = byte((h[2] >> 21) | (h[3] << 5))
s[10] = byte(h[3] >> 3)
s[11] = byte(h[3] >> 11)
s[12] = byte((h[3] >> 19) | (h[4] << 6))
s[13] = byte(h[4] >> 2)
s[14] = byte(h[4] >> 10)
s[15] = byte(h[4] >> 18)
s[16] = byte(h[5] >> 0)
s[17] = byte(h[5] >> 8)
s[18] = byte(h[5] >> 16)
s[19] = byte((h[5] >> 24) | (h[6] << 1))
s[20] = byte(h[6] >> 7)
s[21] = byte(h[6] >> 15)
s[22] = byte((h[6] >> 23) | (h[7] << 3))
s[23] = byte(h[7] >> 5)
s[24] = byte(h[7] >> 13)
s[25] = byte((h[7] >> 21) | (h[8] << 4))
s[26] = byte(h[8] >> 4)
s[27] = byte(h[8] >> 12)
s[28] = byte((h[8] >> 20) | (h[9] << 6))
s[29] = byte(h[9] >> 2)
s[30] = byte(h[9] >> 10)
s[31] = byte(h[9] >> 18)
}
// feMul calculates h = f * g
// Can overlap h with f or g.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Notes on implementation strategy:
//
// Using schoolbook multiplication.
// Karatsuba would save a little in some cost models.
//
// Most multiplications by 2 and 19 are 32-bit precomputations;
// cheaper than 64-bit postcomputations.
//
// There is one remaining multiplication by 19 in the carry chain;
// one *19 precomputation can be merged into this,
// but the resulting data flow is considerably less clean.
//
// There are 12 carries below.
// 10 of them are 2-way parallelizable and vectorizable.
// Can get away with 11 carries, but then data flow is much deeper.
//
// With tighter constraints on inputs can squeeze carries into int32.
func feMul(h, f, g *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
g0 := g[0]
g1 := g[1]
g2 := g[2]
g3 := g[3]
g4 := g[4]
g5 := g[5]
g6 := g[6]
g7 := g[7]
g8 := g[8]
g9 := g[9]
g1_19 := 19 * g1 // 1.4*2^29
g2_19 := 19 * g2 // 1.4*2^30; still ok
g3_19 := 19 * g3
g4_19 := 19 * g4
g5_19 := 19 * g5
g6_19 := 19 * g6
g7_19 := 19 * g7
g8_19 := 19 * g8
g9_19 := 19 * g9
f1_2 := 2 * f1
f3_2 := 2 * f3
f5_2 := 2 * f5
f7_2 := 2 * f7
f9_2 := 2 * f9
f0g0 := int64(f0) * int64(g0)
f0g1 := int64(f0) * int64(g1)
f0g2 := int64(f0) * int64(g2)
f0g3 := int64(f0) * int64(g3)
f0g4 := int64(f0) * int64(g4)
f0g5 := int64(f0) * int64(g5)
f0g6 := int64(f0) * int64(g6)
f0g7 := int64(f0) * int64(g7)
f0g8 := int64(f0) * int64(g8)
f0g9 := int64(f0) * int64(g9)
f1g0 := int64(f1) * int64(g0)
f1g1_2 := int64(f1_2) * int64(g1)
f1g2 := int64(f1) * int64(g2)
f1g3_2 := int64(f1_2) * int64(g3)
f1g4 := int64(f1) * int64(g4)
f1g5_2 := int64(f1_2) * int64(g5)
f1g6 := int64(f1) * int64(g6)
f1g7_2 := int64(f1_2) * int64(g7)
f1g8 := int64(f1) * int64(g8)
f1g9_38 := int64(f1_2) * int64(g9_19)
f2g0 := int64(f2) * int64(g0)
f2g1 := int64(f2) * int64(g1)
f2g2 := int64(f2) * int64(g2)
f2g3 := int64(f2) * int64(g3)
f2g4 := int64(f2) * int64(g4)
f2g5 := int64(f2) * int64(g5)
f2g6 := int64(f2) * int64(g6)
f2g7 := int64(f2) * int64(g7)
f2g8_19 := int64(f2) * int64(g8_19)
f2g9_19 := int64(f2) * int64(g9_19)
f3g0 := int64(f3) * int64(g0)
f3g1_2 := int64(f3_2) * int64(g1)
f3g2 := int64(f3) * int64(g2)
f3g3_2 := int64(f3_2) * int64(g3)
f3g4 := int64(f3) * int64(g4)
f3g5_2 := int64(f3_2) * int64(g5)
f3g6 := int64(f3) * int64(g6)
f3g7_38 := int64(f3_2) * int64(g7_19)
f3g8_19 := int64(f3) * int64(g8_19)
f3g9_38 := int64(f3_2) * int64(g9_19)
f4g0 := int64(f4) * int64(g0)
f4g1 := int64(f4) * int64(g1)
f4g2 := int64(f4) * int64(g2)
f4g3 := int64(f4) * int64(g3)
f4g4 := int64(f4) * int64(g4)
f4g5 := int64(f4) * int64(g5)
f4g6_19 := int64(f4) * int64(g6_19)
f4g7_19 := int64(f4) * int64(g7_19)
f4g8_19 := int64(f4) * int64(g8_19)
f4g9_19 := int64(f4) * int64(g9_19)
f5g0 := int64(f5) * int64(g0)
f5g1_2 := int64(f5_2) * int64(g1)
f5g2 := int64(f5) * int64(g2)
f5g3_2 := int64(f5_2) * int64(g3)
f5g4 := int64(f5) * int64(g4)
f5g5_38 := int64(f5_2) * int64(g5_19)
f5g6_19 := int64(f5) * int64(g6_19)
f5g7_38 := int64(f5_2) * int64(g7_19)
f5g8_19 := int64(f5) * int64(g8_19)
f5g9_38 := int64(f5_2) * int64(g9_19)
f6g0 := int64(f6) * int64(g0)
f6g1 := int64(f6) * int64(g1)
f6g2 := int64(f6) * int64(g2)
f6g3 := int64(f6) * int64(g3)
f6g4_19 := int64(f6) * int64(g4_19)
f6g5_19 := int64(f6) * int64(g5_19)
f6g6_19 := int64(f6) * int64(g6_19)
f6g7_19 := int64(f6) * int64(g7_19)
f6g8_19 := int64(f6) * int64(g8_19)
f6g9_19 := int64(f6) * int64(g9_19)
f7g0 := int64(f7) * int64(g0)
f7g1_2 := int64(f7_2) * int64(g1)
f7g2 := int64(f7) * int64(g2)
f7g3_38 := int64(f7_2) * int64(g3_19)
f7g4_19 := int64(f7) * int64(g4_19)
f7g5_38 := int64(f7_2) * int64(g5_19)
f7g6_19 := int64(f7) * int64(g6_19)
f7g7_38 := int64(f7_2) * int64(g7_19)
f7g8_19 := int64(f7) * int64(g8_19)
f7g9_38 := int64(f7_2) * int64(g9_19)
f8g0 := int64(f8) * int64(g0)
f8g1 := int64(f8) * int64(g1)
f8g2_19 := int64(f8) * int64(g2_19)
f8g3_19 := int64(f8) * int64(g3_19)
f8g4_19 := int64(f8) * int64(g4_19)
f8g5_19 := int64(f8) * int64(g5_19)
f8g6_19 := int64(f8) * int64(g6_19)
f8g7_19 := int64(f8) * int64(g7_19)
f8g8_19 := int64(f8) * int64(g8_19)
f8g9_19 := int64(f8) * int64(g9_19)
f9g0 := int64(f9) * int64(g0)
f9g1_38 := int64(f9_2) * int64(g1_19)
f9g2_19 := int64(f9) * int64(g2_19)
f9g3_38 := int64(f9_2) * int64(g3_19)
f9g4_19 := int64(f9) * int64(g4_19)
f9g5_38 := int64(f9_2) * int64(g5_19)
f9g6_19 := int64(f9) * int64(g6_19)
f9g7_38 := int64(f9_2) * int64(g7_19)
f9g8_19 := int64(f9) * int64(g8_19)
f9g9_38 := int64(f9_2) * int64(g9_19)
h0 := f0g0 + f1g9_38 + f2g8_19 + f3g7_38 + f4g6_19 + f5g5_38 + f6g4_19 + f7g3_38 + f8g2_19 + f9g1_38
h1 := f0g1 + f1g0 + f2g9_19 + f3g8_19 + f4g7_19 + f5g6_19 + f6g5_19 + f7g4_19 + f8g3_19 + f9g2_19
h2 := f0g2 + f1g1_2 + f2g0 + f3g9_38 + f4g8_19 + f5g7_38 + f6g6_19 + f7g5_38 + f8g4_19 + f9g3_38
h3 := f0g3 + f1g2 + f2g1 + f3g0 + f4g9_19 + f5g8_19 + f6g7_19 + f7g6_19 + f8g5_19 + f9g4_19
h4 := f0g4 + f1g3_2 + f2g2 + f3g1_2 + f4g0 + f5g9_38 + f6g8_19 + f7g7_38 + f8g6_19 + f9g5_38
h5 := f0g5 + f1g4 + f2g3 + f3g2 + f4g1 + f5g0 + f6g9_19 + f7g8_19 + f8g7_19 + f9g6_19
h6 := f0g6 + f1g5_2 + f2g4 + f3g3_2 + f4g2 + f5g1_2 + f6g0 + f7g9_38 + f8g8_19 + f9g7_38
h7 := f0g7 + f1g6 + f2g5 + f3g4 + f4g3 + f5g2 + f6g1 + f7g0 + f8g9_19 + f9g8_19
h8 := f0g8 + f1g7_2 + f2g6 + f3g5_2 + f4g4 + f5g3_2 + f6g2 + f7g1_2 + f8g0 + f9g9_38
h9 := f0g9 + f1g8 + f2g7 + f3g6 + f4g5 + f5g4 + f6g3 + f7g2 + f8g1 + f9g0
var carry [10]int64
// |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38))
// i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8
// |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19))
// i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
// |h0| <= 2^25
// |h4| <= 2^25
// |h1| <= 1.51*2^58
// |h5| <= 1.51*2^58
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
// |h1| <= 2^24; from now on fits into int32
// |h5| <= 2^24; from now on fits into int32
// |h2| <= 1.21*2^59
// |h6| <= 1.21*2^59
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
// |h2| <= 2^25; from now on fits into int32 unchanged
// |h6| <= 2^25; from now on fits into int32 unchanged
// |h3| <= 1.51*2^58
// |h7| <= 1.51*2^58
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
// |h3| <= 2^24; from now on fits into int32 unchanged
// |h7| <= 2^24; from now on fits into int32 unchanged
// |h4| <= 1.52*2^33
// |h8| <= 1.52*2^33
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
// |h4| <= 2^25; from now on fits into int32 unchanged
// |h8| <= 2^25; from now on fits into int32 unchanged
// |h5| <= 1.01*2^24
// |h9| <= 1.51*2^58
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
// |h9| <= 2^24; from now on fits into int32 unchanged
// |h0| <= 1.8*2^37
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
// |h0| <= 2^25; from now on fits into int32 unchanged
// |h1| <= 1.01*2^24
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feSquare calculates h = f*f. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feSquare(h, f *fieldElement) {
f0 := f[0]
f1 := f[1]
f2 := f[2]
f3 := f[3]
f4 := f[4]
f5 := f[5]
f6 := f[6]
f7 := f[7]
f8 := f[8]
f9 := f[9]
f0_2 := 2 * f0
f1_2 := 2 * f1
f2_2 := 2 * f2
f3_2 := 2 * f3
f4_2 := 2 * f4
f5_2 := 2 * f5
f6_2 := 2 * f6
f7_2 := 2 * f7
f5_38 := 38 * f5 // 1.31*2^30
f6_19 := 19 * f6 // 1.31*2^30
f7_38 := 38 * f7 // 1.31*2^30
f8_19 := 19 * f8 // 1.31*2^30
f9_38 := 38 * f9 // 1.31*2^30
f0f0 := int64(f0) * int64(f0)
f0f1_2 := int64(f0_2) * int64(f1)
f0f2_2 := int64(f0_2) * int64(f2)
f0f3_2 := int64(f0_2) * int64(f3)
f0f4_2 := int64(f0_2) * int64(f4)
f0f5_2 := int64(f0_2) * int64(f5)
f0f6_2 := int64(f0_2) * int64(f6)
f0f7_2 := int64(f0_2) * int64(f7)
f0f8_2 := int64(f0_2) * int64(f8)
f0f9_2 := int64(f0_2) * int64(f9)
f1f1_2 := int64(f1_2) * int64(f1)
f1f2_2 := int64(f1_2) * int64(f2)
f1f3_4 := int64(f1_2) * int64(f3_2)
f1f4_2 := int64(f1_2) * int64(f4)
f1f5_4 := int64(f1_2) * int64(f5_2)
f1f6_2 := int64(f1_2) * int64(f6)
f1f7_4 := int64(f1_2) * int64(f7_2)
f1f8_2 := int64(f1_2) * int64(f8)
f1f9_76 := int64(f1_2) * int64(f9_38)
f2f2 := int64(f2) * int64(f2)
f2f3_2 := int64(f2_2) * int64(f3)
f2f4_2 := int64(f2_2) * int64(f4)
f2f5_2 := int64(f2_2) * int64(f5)
f2f6_2 := int64(f2_2) * int64(f6)
f2f7_2 := int64(f2_2) * int64(f7)
f2f8_38 := int64(f2_2) * int64(f8_19)
f2f9_38 := int64(f2) * int64(f9_38)
f3f3_2 := int64(f3_2) * int64(f3)
f3f4_2 := int64(f3_2) * int64(f4)
f3f5_4 := int64(f3_2) * int64(f5_2)
f3f6_2 := int64(f3_2) * int64(f6)
f3f7_76 := int64(f3_2) * int64(f7_38)
f3f8_38 := int64(f3_2) * int64(f8_19)
f3f9_76 := int64(f3_2) * int64(f9_38)
f4f4 := int64(f4) * int64(f4)
f4f5_2 := int64(f4_2) * int64(f5)
f4f6_38 := int64(f4_2) * int64(f6_19)
f4f7_38 := int64(f4) * int64(f7_38)
f4f8_38 := int64(f4_2) * int64(f8_19)
f4f9_38 := int64(f4) * int64(f9_38)
f5f5_38 := int64(f5) * int64(f5_38)
f5f6_38 := int64(f5_2) * int64(f6_19)
f5f7_76 := int64(f5_2) * int64(f7_38)
f5f8_38 := int64(f5_2) * int64(f8_19)
f5f9_76 := int64(f5_2) * int64(f9_38)
f6f6_19 := int64(f6) * int64(f6_19)
f6f7_38 := int64(f6) * int64(f7_38)
f6f8_38 := int64(f6_2) * int64(f8_19)
f6f9_38 := int64(f6) * int64(f9_38)
f7f7_38 := int64(f7) * int64(f7_38)
f7f8_38 := int64(f7_2) * int64(f8_19)
f7f9_76 := int64(f7_2) * int64(f9_38)
f8f8_19 := int64(f8) * int64(f8_19)
f8f9_38 := int64(f8) * int64(f9_38)
f9f9_38 := int64(f9) * int64(f9_38)
h0 := f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38
h1 := f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38
h2 := f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19
h3 := f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38
h4 := f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38
h5 := f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38
h6 := f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19
h7 := f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38
h8 := f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38
h9 := f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2
var carry [10]int64
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feMul121666 calculates h = f * 121666. Can overlap h with f.
//
// Preconditions:
// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
//
// Postconditions:
// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
func feMul121666(h, f *fieldElement) {
h0 := int64(f[0]) * 121666
h1 := int64(f[1]) * 121666
h2 := int64(f[2]) * 121666
h3 := int64(f[3]) * 121666
h4 := int64(f[4]) * 121666
h5 := int64(f[5]) * 121666
h6 := int64(f[6]) * 121666
h7 := int64(f[7]) * 121666
h8 := int64(f[8]) * 121666
h9 := int64(f[9]) * 121666
var carry [10]int64
carry[9] = (h9 + (1 << 24)) >> 25
h0 += carry[9] * 19
h9 -= carry[9] << 25
carry[1] = (h1 + (1 << 24)) >> 25
h2 += carry[1]
h1 -= carry[1] << 25
carry[3] = (h3 + (1 << 24)) >> 25
h4 += carry[3]
h3 -= carry[3] << 25
carry[5] = (h5 + (1 << 24)) >> 25
h6 += carry[5]
h5 -= carry[5] << 25
carry[7] = (h7 + (1 << 24)) >> 25
h8 += carry[7]
h7 -= carry[7] << 25
carry[0] = (h0 + (1 << 25)) >> 26
h1 += carry[0]
h0 -= carry[0] << 26
carry[2] = (h2 + (1 << 25)) >> 26
h3 += carry[2]
h2 -= carry[2] << 26
carry[4] = (h4 + (1 << 25)) >> 26
h5 += carry[4]
h4 -= carry[4] << 26
carry[6] = (h6 + (1 << 25)) >> 26
h7 += carry[6]
h6 -= carry[6] << 26
carry[8] = (h8 + (1 << 25)) >> 26
h9 += carry[8]
h8 -= carry[8] << 26
h[0] = int32(h0)
h[1] = int32(h1)
h[2] = int32(h2)
h[3] = int32(h3)
h[4] = int32(h4)
h[5] = int32(h5)
h[6] = int32(h6)
h[7] = int32(h7)
h[8] = int32(h8)
h[9] = int32(h9)
}
// feInvert sets out = z^-1.
func feInvert(out, z *fieldElement) {
var t0, t1, t2, t3 fieldElement
var i int
feSquare(&t0, z)
for i = 1; i < 1; i++ {
feSquare(&t0, &t0)
}
feSquare(&t1, &t0)
for i = 1; i < 2; i++ {
feSquare(&t1, &t1)
}
feMul(&t1, z, &t1)
feMul(&t0, &t0, &t1)
feSquare(&t2, &t0)
for i = 1; i < 1; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t1, &t2)
feSquare(&t2, &t1)
for i = 1; i < 5; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 20; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 10; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t2, &t1)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t2, &t2, &t1)
feSquare(&t3, &t2)
for i = 1; i < 100; i++ {
feSquare(&t3, &t3)
}
feMul(&t2, &t3, &t2)
feSquare(&t2, &t2)
for i = 1; i < 50; i++ {
feSquare(&t2, &t2)
}
feMul(&t1, &t2, &t1)
feSquare(&t1, &t1)
for i = 1; i < 5; i++ {
feSquare(&t1, &t1)
}
feMul(out, &t1, &t0)
}
func scalarMultGeneric(out, in, base *[32]byte) {
var e [32]byte
copy(e[:], in[:])
e[0] &= 248
e[31] &= 127
e[31] |= 64
var x1, x2, z2, x3, z3, tmp0, tmp1 fieldElement
feFromBytes(&x1, base)
feOne(&x2)
feCopy(&x3, &x1)
feOne(&z3)
swap := int32(0)
for pos := 254; pos >= 0; pos-- {
b := e[pos/8] >> uint(pos&7)
b &= 1
swap ^= int32(b)
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
swap = int32(b)
feSub(&tmp0, &x3, &z3)
feSub(&tmp1, &x2, &z2)
feAdd(&x2, &x2, &z2)
feAdd(&z2, &x3, &z3)
feMul(&z3, &tmp0, &x2)
feMul(&z2, &z2, &tmp1)
feSquare(&tmp0, &tmp1)
feSquare(&tmp1, &x2)
feAdd(&x3, &z3, &z2)
feSub(&z2, &z3, &z2)
feMul(&x2, &tmp1, &tmp0)
feSub(&tmp1, &tmp1, &tmp0)
feSquare(&z2, &z2)
feMul121666(&z3, &tmp1)
feSquare(&x3, &x3)
feAdd(&tmp0, &tmp0, &z3)
feMul(&z3, &x1, &z2)
feMul(&z2, &tmp1, &tmp0)
}
feCSwap(&x2, &x3, swap)
feCSwap(&z2, &z3, swap)
feInvert(&z2, &z2)
feMul(&x2, &x2, &z2)
feToBytes(out, &x2)
}

11
vendor/golang.org/x/crypto/curve25519/curve25519_noasm.go generated vendored Normal file
View File

@@ -0,0 +1,11 @@
// Copyright 2019 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 purego
package curve25519
func scalarMult(out, in, base *[32]byte) {
scalarMultGeneric(out, in, base)
}

5
vendor/golang.org/x/crypto/ed25519/ed25519.go generated vendored
View File

@@ -2,6 +2,11 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// In Go 1.13, the ed25519 package was promoted to the standard library as
// crypto/ed25519, and this package became a wrapper for the standard library one.
//
// +build !go1.13
// Package ed25519 implements the Ed25519 signature algorithm. See
// https://ed25519.cr.yp.to/.
//

73
vendor/golang.org/x/crypto/ed25519/ed25519_go113.go generated vendored Normal file
View File

@@ -0,0 +1,73 @@
// Copyright 2019 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 go1.13
// Package ed25519 implements the Ed25519 signature algorithm. See
// https://ed25519.cr.yp.to/.
//
// These functions are also compatible with the “Ed25519” function defined in
// RFC 8032. However, unlike RFC 8032's formulation, this package's private key
// representation includes a public key suffix to make multiple signing
// operations with the same key more efficient. This package refers to the RFC
// 8032 private key as the “seed”.
//
// Beginning with Go 1.13, the functionality of this package was moved to the
// standard library as crypto/ed25519. This package only acts as a compatibility
// wrapper.
package ed25519
import (
"crypto/ed25519"
"io"
)
const (
// PublicKeySize is the size, in bytes, of public keys as used in this package.
PublicKeySize = 32
// PrivateKeySize is the size, in bytes, of private keys as used in this package.
PrivateKeySize = 64
// SignatureSize is the size, in bytes, of signatures generated and verified by this package.
SignatureSize = 64
// SeedSize is the size, in bytes, of private key seeds. These are the private key representations used by RFC 8032.
SeedSize = 32
)
// PublicKey is the type of Ed25519 public keys.
//
// This type is an alias for crypto/ed25519's PublicKey type.
// See the crypto/ed25519 package for the methods on this type.
type PublicKey = ed25519.PublicKey
// PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer.
//
// This type is an alias for crypto/ed25519's PrivateKey type.
// See the crypto/ed25519 package for the methods on this type.
type PrivateKey = ed25519.PrivateKey
// GenerateKey generates a public/private key pair using entropy from rand.
// If rand is nil, crypto/rand.Reader will be used.
func GenerateKey(rand io.Reader) (PublicKey, PrivateKey, error) {
return ed25519.GenerateKey(rand)
}
// NewKeyFromSeed calculates a private key from a seed. It will panic if
// len(seed) is not SeedSize. This function is provided for interoperability
// with RFC 8032. RFC 8032's private keys correspond to seeds in this
// package.
func NewKeyFromSeed(seed []byte) PrivateKey {
return ed25519.NewKeyFromSeed(seed)
}
// Sign signs the message with privateKey and returns a signature. It will
// panic if len(privateKey) is not PrivateKeySize.
func Sign(privateKey PrivateKey, message []byte) []byte {
return ed25519.Sign(privateKey, message)
}
// Verify reports whether sig is a valid signature of message by publicKey. It
// will panic if len(publicKey) is not PublicKeySize.
func Verify(publicKey PublicKey, message, sig []byte) bool {
return ed25519.Verify(publicKey, message, sig)
}

21
vendor/golang.org/x/crypto/openpgp/armor/armor.go generated vendored
View File

@@ -62,10 +62,11 @@ var armorEndOfLine = []byte("-----")
// lineReader wraps a line based reader. It watches for the end of an armor
// block and records the expected CRC value.
type lineReader struct {
in *bufio.Reader
buf []byte
eof bool
crc uint32
in *bufio.Reader
buf []byte
eof bool
crc uint32
crcSet bool
}
func (l *lineReader) Read(p []byte) (n int, err error) {
@@ -87,6 +88,11 @@ func (l *lineReader) Read(p []byte) (n int, err error) {
return 0, ArmorCorrupt
}
if bytes.HasPrefix(line, armorEnd) {
l.eof = true
return 0, io.EOF
}
if len(line) == 5 && line[0] == '=' {
// This is the checksum line
var expectedBytes [3]byte
@@ -108,6 +114,7 @@ func (l *lineReader) Read(p []byte) (n int, err error) {
}
l.eof = true
l.crcSet = true
return 0, io.EOF
}
@@ -141,10 +148,8 @@ func (r *openpgpReader) Read(p []byte) (n int, err error) {
n, err = r.b64Reader.Read(p)
r.currentCRC = crc24(r.currentCRC, p[:n])
if err == io.EOF {
if r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
return 0, ArmorCorrupt
}
if err == io.EOF && r.lReader.crcSet && r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
return 0, ArmorCorrupt
}
return

418
vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go generated vendored Normal file
View File

@@ -0,0 +1,418 @@
// 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 clearsign generates and processes OpenPGP, clear-signed data. See
// RFC 4880, section 7.
//
// Clearsigned messages are cryptographically signed, but the contents of the
// message are kept in plaintext so that it can be read without special tools.
package clearsign // import "golang.org/x/crypto/openpgp/clearsign"
import (
"bufio"
"bytes"
"crypto"
"fmt"
"hash"
"io"
"net/textproto"
"strconv"
"strings"
"golang.org/x/crypto/openpgp/armor"
"golang.org/x/crypto/openpgp/errors"
"golang.org/x/crypto/openpgp/packet"
)
// A Block represents a clearsigned message. A signature on a Block can
// be checked by passing Bytes into openpgp.CheckDetachedSignature.
type Block struct {
Headers textproto.MIMEHeader // Optional unverified Hash headers
Plaintext []byte // The original message text
Bytes []byte // The signed message
ArmoredSignature *armor.Block // The signature block
}
// start is the marker which denotes the beginning of a clearsigned message.
var start = []byte("\n-----BEGIN PGP SIGNED MESSAGE-----")
// dashEscape is prefixed to any lines that begin with a hyphen so that they
// can't be confused with endText.
var dashEscape = []byte("- ")
// endText is a marker which denotes the end of the message and the start of
// an armored signature.
var endText = []byte("-----BEGIN PGP SIGNATURE-----")
// end is a marker which denotes the end of the armored signature.
var end = []byte("\n-----END PGP SIGNATURE-----")
var crlf = []byte("\r\n")
var lf = byte('\n')
// getLine returns the first \r\n or \n delineated line from the given byte
// array. The line does not include the \r\n or \n. The remainder of the byte
// array (also not including the new line bytes) is also returned and this will
// always be smaller than the original argument.
func getLine(data []byte) (line, rest []byte) {
i := bytes.Index(data, []byte{'\n'})
var j int
if i < 0 {
i = len(data)
j = i
} else {
j = i + 1
if i > 0 && data[i-1] == '\r' {
i--
}
}
return data[0:i], data[j:]
}
// Decode finds the first clearsigned message in data and returns it, as well as
// the suffix of data which remains after the message. Any prefix data is
// discarded.
//
// If no message is found, or if the message is invalid, Decode returns nil and
// the whole data slice. The only allowed header type is Hash, and it is not
// verified against the signature hash.
func Decode(data []byte) (b *Block, rest []byte) {
// start begins with a newline. However, at the very beginning of
// the byte array, we'll accept the start string without it.
rest = data
if bytes.HasPrefix(data, start[1:]) {
rest = rest[len(start)-1:]
} else if i := bytes.Index(data, start); i >= 0 {
rest = rest[i+len(start):]
} else {
return nil, data
}
// Consume the start line and check it does not have a suffix.
suffix, rest := getLine(rest)
if len(suffix) != 0 {
return nil, data
}
var line []byte
b = &Block{
Headers: make(textproto.MIMEHeader),
}
// Next come a series of header lines.
for {
// This loop terminates because getLine's second result is
// always smaller than its argument.
if len(rest) == 0 {
return nil, data
}
// An empty line marks the end of the headers.
if line, rest = getLine(rest); len(line) == 0 {
break
}
// Reject headers with control or Unicode characters.
if i := bytes.IndexFunc(line, func(r rune) bool {
return r < 0x20 || r > 0x7e
}); i != -1 {
return nil, data
}
i := bytes.Index(line, []byte{':'})
if i == -1 {
return nil, data
}
key, val := string(line[0:i]), string(line[i+1:])
key = strings.TrimSpace(key)
if key != "Hash" {
return nil, data
}
val = strings.TrimSpace(val)
b.Headers.Add(key, val)
}
firstLine := true
for {
start := rest
line, rest = getLine(rest)
if len(line) == 0 && len(rest) == 0 {
// No armored data was found, so this isn't a complete message.
return nil, data
}
if bytes.Equal(line, endText) {
// Back up to the start of the line because armor expects to see the
// header line.
rest = start
break
}
// The final CRLF isn't included in the hash so we don't write it until
// we've seen the next line.
if firstLine {
firstLine = false
} else {
b.Bytes = append(b.Bytes, crlf...)
}
if bytes.HasPrefix(line, dashEscape) {
line = line[2:]
}
line = bytes.TrimRight(line, " \t")
b.Bytes = append(b.Bytes, line...)
b.Plaintext = append(b.Plaintext, line...)
b.Plaintext = append(b.Plaintext, lf)
}
// We want to find the extent of the armored data (including any newlines at
// the end).
i := bytes.Index(rest, end)
if i == -1 {
return nil, data
}
i += len(end)
for i < len(rest) && (rest[i] == '\r' || rest[i] == '\n') {
i++
}
armored := rest[:i]
rest = rest[i:]
var err error
b.ArmoredSignature, err = armor.Decode(bytes.NewBuffer(armored))
if err != nil {
return nil, data
}
return b, rest
}
// A dashEscaper is an io.WriteCloser which processes the body of a clear-signed
// message. The clear-signed message is written to buffered and a hash, suitable
// for signing, is maintained in h.
//
// When closed, an armored signature is created and written to complete the
// message.
type dashEscaper struct {
buffered *bufio.Writer
hashers []hash.Hash // one per key in privateKeys
hashType crypto.Hash
toHash io.Writer // writes to all the hashes in hashers
atBeginningOfLine bool
isFirstLine bool
whitespace []byte
byteBuf []byte // a one byte buffer to save allocations
privateKeys []*packet.PrivateKey
config *packet.Config
}
func (d *dashEscaper) Write(data []byte) (n int, err error) {
for _, b := range data {
d.byteBuf[0] = b
if d.atBeginningOfLine {
// The final CRLF isn't included in the hash so we have to wait
// until this point (the start of the next line) before writing it.
if !d.isFirstLine {
d.toHash.Write(crlf)
}
d.isFirstLine = false
}
// Any whitespace at the end of the line has to be removed so we
// buffer it until we find out whether there's more on this line.
if b == ' ' || b == '\t' || b == '\r' {
d.whitespace = append(d.whitespace, b)
d.atBeginningOfLine = false
continue
}
if d.atBeginningOfLine {
// At the beginning of a line, hyphens have to be escaped.
if b == '-' {
// The signature isn't calculated over the dash-escaped text so
// the escape is only written to buffered.
if _, err = d.buffered.Write(dashEscape); err != nil {
return
}
d.toHash.Write(d.byteBuf)
d.atBeginningOfLine = false
} else if b == '\n' {
// Nothing to do because we delay writing CRLF to the hash.
} else {
d.toHash.Write(d.byteBuf)
d.atBeginningOfLine = false
}
if err = d.buffered.WriteByte(b); err != nil {
return
}
} else {
if b == '\n' {
// We got a raw \n. Drop any trailing whitespace and write a
// CRLF.
d.whitespace = d.whitespace[:0]
// We delay writing CRLF to the hash until the start of the
// next line.
if err = d.buffered.WriteByte(b); err != nil {
return
}
d.atBeginningOfLine = true
} else {
// Any buffered whitespace wasn't at the end of the line so
// we need to write it out.
if len(d.whitespace) > 0 {
d.toHash.Write(d.whitespace)
if _, err = d.buffered.Write(d.whitespace); err != nil {
return
}
d.whitespace = d.whitespace[:0]
}
d.toHash.Write(d.byteBuf)
if err = d.buffered.WriteByte(b); err != nil {
return
}
}
}
}
n = len(data)
return
}
func (d *dashEscaper) Close() (err error) {
if !d.atBeginningOfLine {
if err = d.buffered.WriteByte(lf); err != nil {
return
}
}
out, err := armor.Encode(d.buffered, "PGP SIGNATURE", nil)
if err != nil {
return
}
t := d.config.Now()
for i, k := range d.privateKeys {
sig := new(packet.Signature)
sig.SigType = packet.SigTypeText
sig.PubKeyAlgo = k.PubKeyAlgo
sig.Hash = d.hashType
sig.CreationTime = t
sig.IssuerKeyId = &k.KeyId
if err = sig.Sign(d.hashers[i], k, d.config); err != nil {
return
}
if err = sig.Serialize(out); err != nil {
return
}
}
if err = out.Close(); err != nil {
return
}
if err = d.buffered.Flush(); err != nil {
return
}
return
}
// Encode returns a WriteCloser which will clear-sign a message with privateKey
// and write it to w. If config is nil, sensible defaults are used.
func Encode(w io.Writer, privateKey *packet.PrivateKey, config *packet.Config) (plaintext io.WriteCloser, err error) {
return EncodeMulti(w, []*packet.PrivateKey{privateKey}, config)
}
// EncodeMulti returns a WriteCloser which will clear-sign a message with all the
// private keys indicated and write it to w. If config is nil, sensible defaults
// are used.
func EncodeMulti(w io.Writer, privateKeys []*packet.PrivateKey, config *packet.Config) (plaintext io.WriteCloser, err error) {
for _, k := range privateKeys {
if k.Encrypted {
return nil, errors.InvalidArgumentError(fmt.Sprintf("signing key %s is encrypted", k.KeyIdString()))
}
}
hashType := config.Hash()
name := nameOfHash(hashType)
if len(name) == 0 {
return nil, errors.UnsupportedError("unknown hash type: " + strconv.Itoa(int(hashType)))
}
if !hashType.Available() {
return nil, errors.UnsupportedError("unsupported hash type: " + strconv.Itoa(int(hashType)))
}
var hashers []hash.Hash
var ws []io.Writer
for range privateKeys {
h := hashType.New()
hashers = append(hashers, h)
ws = append(ws, h)
}
toHash := io.MultiWriter(ws...)
buffered := bufio.NewWriter(w)
// start has a \n at the beginning that we don't want here.
if _, err = buffered.Write(start[1:]); err != nil {
return
}
if err = buffered.WriteByte(lf); err != nil {
return
}
if _, err = buffered.WriteString("Hash: "); err != nil {
return
}
if _, err = buffered.WriteString(name); err != nil {
return
}
if err = buffered.WriteByte(lf); err != nil {
return
}
if err = buffered.WriteByte(lf); err != nil {
return
}
plaintext = &dashEscaper{
buffered: buffered,
hashers: hashers,
hashType: hashType,
toHash: toHash,
atBeginningOfLine: true,
isFirstLine: true,
byteBuf: make([]byte, 1),
privateKeys: privateKeys,
config: config,
}
return
}
// nameOfHash returns the OpenPGP name for the given hash, or the empty string
// if the name isn't known. See RFC 4880, section 9.4.
func nameOfHash(h crypto.Hash) string {
switch h {
case crypto.MD5:
return "MD5"
case crypto.SHA1:
return "SHA1"
case crypto.RIPEMD160:
return "RIPEMD160"
case crypto.SHA224:
return "SHA224"
case crypto.SHA256:
return "SHA256"
case crypto.SHA384:
return "SHA384"
case crypto.SHA512:
return "SHA512"
}
return ""
}

4
vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go generated vendored
View File

@@ -76,7 +76,9 @@ func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err
// Bleichenbacher, Advances in Cryptology (Crypto '98),
func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error) {
s := new(big.Int).Exp(c1, priv.X, priv.P)
s.ModInverse(s, priv.P)
if s.ModInverse(s, priv.P) == nil {
return nil, errors.New("elgamal: invalid private key")
}
s.Mul(s, c2)
s.Mod(s, priv.P)
em := s.Bytes()

14
vendor/golang.org/x/crypto/openpgp/keys.go generated vendored
View File

@@ -504,7 +504,7 @@ const defaultRSAKeyBits = 2048
// which may be empty but must not contain any of "()<>\x00".
// If config is nil, sensible defaults will be used.
func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) {
currentTime := config.Now()
creationTime := config.Now()
bits := defaultRSAKeyBits
if config != nil && config.RSABits != 0 {
@@ -525,8 +525,8 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
}
e := &Entity{
PrimaryKey: packet.NewRSAPublicKey(currentTime, &signingPriv.PublicKey),
PrivateKey: packet.NewRSAPrivateKey(currentTime, signingPriv),
PrimaryKey: packet.NewRSAPublicKey(creationTime, &signingPriv.PublicKey),
PrivateKey: packet.NewRSAPrivateKey(creationTime, signingPriv),
Identities: make(map[string]*Identity),
}
isPrimaryId := true
@@ -534,7 +534,7 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
Name: uid.Id,
UserId: uid,
SelfSignature: &packet.Signature{
CreationTime: currentTime,
CreationTime: creationTime,
SigType: packet.SigTypePositiveCert,
PubKeyAlgo: packet.PubKeyAlgoRSA,
Hash: config.Hash(),
@@ -563,10 +563,10 @@ func NewEntity(name, comment, email string, config *packet.Config) (*Entity, err
e.Subkeys = make([]Subkey, 1)
e.Subkeys[0] = Subkey{
PublicKey: packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey),
PrivateKey: packet.NewRSAPrivateKey(currentTime, encryptingPriv),
PublicKey: packet.NewRSAPublicKey(creationTime, &encryptingPriv.PublicKey),
PrivateKey: packet.NewRSAPrivateKey(creationTime, encryptingPriv),
Sig: &packet.Signature{
CreationTime: currentTime,
CreationTime: creationTime,
SigType: packet.SigTypeSubkeyBinding,
PubKeyAlgo: packet.PubKeyAlgoRSA,
Hash: config.Hash(),

6
vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go generated vendored
View File

@@ -5,6 +5,7 @@
package packet
import (
"crypto"
"crypto/rsa"
"encoding/binary"
"io"
@@ -78,8 +79,9 @@ func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error {
// padding oracle attacks.
switch priv.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
k := priv.PrivateKey.(*rsa.PrivateKey)
b, err = rsa.DecryptPKCS1v15(config.Random(), k, padToKeySize(&k.PublicKey, e.encryptedMPI1.bytes))
// Supports both *rsa.PrivateKey and crypto.Decrypter
k := priv.PrivateKey.(crypto.Decrypter)
b, err = k.Decrypt(config.Random(), padToKeySize(k.Public().(*rsa.PublicKey), e.encryptedMPI1.bytes), nil)
case PubKeyAlgoElGamal:
c1 := new(big.Int).SetBytes(e.encryptedMPI1.bytes)
c2 := new(big.Int).SetBytes(e.encryptedMPI2.bytes)

69
vendor/golang.org/x/crypto/openpgp/packet/packet.go generated vendored
View File

@@ -14,6 +14,7 @@ import (
"crypto/rsa"
"io"
"math/big"
"math/bits"
"golang.org/x/crypto/cast5"
"golang.org/x/crypto/openpgp/errors"
@@ -100,33 +101,65 @@ func (r *partialLengthReader) Read(p []byte) (n int, err error) {
type partialLengthWriter struct {
w io.WriteCloser
lengthByte [1]byte
sentFirst bool
buf []byte
}
// RFC 4880 4.2.2.4: the first partial length MUST be at least 512 octets long.
const minFirstPartialWrite = 512
func (w *partialLengthWriter) Write(p []byte) (n int, err error) {
for len(p) > 0 {
for power := uint(14); power < 32; power-- {
l := 1 << power
if len(p) >= l {
w.lengthByte[0] = 224 + uint8(power)
_, err = w.w.Write(w.lengthByte[:])
if err != nil {
return
}
var m int
m, err = w.w.Write(p[:l])
n += m
if err != nil {
return
}
p = p[l:]
break
off := 0
if !w.sentFirst {
if len(w.buf) > 0 || len(p) < minFirstPartialWrite {
off = len(w.buf)
w.buf = append(w.buf, p...)
if len(w.buf) < minFirstPartialWrite {
return len(p), nil
}
p = w.buf
w.buf = nil
}
w.sentFirst = true
}
return
power := uint8(30)
for len(p) > 0 {
l := 1 << power
if len(p) < l {
power = uint8(bits.Len32(uint32(len(p)))) - 1
l = 1 << power
}
w.lengthByte[0] = 224 + power
_, err = w.w.Write(w.lengthByte[:])
if err == nil {
var m int
m, err = w.w.Write(p[:l])
n += m
}
if err != nil {
if n < off {
return 0, err
}
return n - off, err
}
p = p[l:]
}
return n - off, nil
}
func (w *partialLengthWriter) Close() error {
if len(w.buf) > 0 {
// In this case we can't send a 512 byte packet.
// Just send what we have.
p := w.buf
w.sentFirst = true
w.buf = nil
if _, err := w.Write(p); err != nil {
return err
}
}
w.lengthByte[0] = 0
_, err := w.w.Write(w.lengthByte[:])
if err != nil {

28
vendor/golang.org/x/crypto/openpgp/packet/private_key.go generated vendored
View File

@@ -31,54 +31,54 @@ type PrivateKey struct {
encryptedData []byte
cipher CipherFunction
s2k func(out, in []byte)
PrivateKey interface{} // An *{rsa|dsa|ecdsa}.PrivateKey or a crypto.Signer.
PrivateKey interface{} // An *{rsa|dsa|ecdsa}.PrivateKey or crypto.Signer/crypto.Decrypter (Decryptor RSA only).
sha1Checksum bool
iv []byte
}
func NewRSAPrivateKey(currentTime time.Time, priv *rsa.PrivateKey) *PrivateKey {
func NewRSAPrivateKey(creationTime time.Time, priv *rsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewRSAPublicKey(currentTime, &priv.PublicKey)
pk.PublicKey = *NewRSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewDSAPrivateKey(currentTime time.Time, priv *dsa.PrivateKey) *PrivateKey {
func NewDSAPrivateKey(creationTime time.Time, priv *dsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewDSAPublicKey(currentTime, &priv.PublicKey)
pk.PublicKey = *NewDSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewElGamalPrivateKey(currentTime time.Time, priv *elgamal.PrivateKey) *PrivateKey {
func NewElGamalPrivateKey(creationTime time.Time, priv *elgamal.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewElGamalPublicKey(currentTime, &priv.PublicKey)
pk.PublicKey = *NewElGamalPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewECDSAPrivateKey(currentTime time.Time, priv *ecdsa.PrivateKey) *PrivateKey {
func NewECDSAPrivateKey(creationTime time.Time, priv *ecdsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewECDSAPublicKey(currentTime, &priv.PublicKey)
pk.PublicKey = *NewECDSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
// NewSignerPrivateKey creates a PrivateKey from a crypto.Signer that
// implements RSA or ECDSA.
func NewSignerPrivateKey(currentTime time.Time, signer crypto.Signer) *PrivateKey {
func NewSignerPrivateKey(creationTime time.Time, signer crypto.Signer) *PrivateKey {
pk := new(PrivateKey)
// In general, the public Keys should be used as pointers. We still
// type-switch on the values, for backwards-compatibility.
switch pubkey := signer.Public().(type) {
case *rsa.PublicKey:
pk.PublicKey = *NewRSAPublicKey(currentTime, pubkey)
pk.PublicKey = *NewRSAPublicKey(creationTime, pubkey)
case rsa.PublicKey:
pk.PublicKey = *NewRSAPublicKey(currentTime, &pubkey)
pk.PublicKey = *NewRSAPublicKey(creationTime, &pubkey)
case *ecdsa.PublicKey:
pk.PublicKey = *NewECDSAPublicKey(currentTime, pubkey)
pk.PublicKey = *NewECDSAPublicKey(creationTime, pubkey)
case ecdsa.PublicKey:
pk.PublicKey = *NewECDSAPublicKey(currentTime, &pubkey)
pk.PublicKey = *NewECDSAPublicKey(creationTime, &pubkey)
default:
panic("openpgp: unknown crypto.Signer type in NewSignerPrivateKey")
}

39
vendor/golang.org/x/crypto/poly1305/bits_compat.go generated vendored Normal file
View File

@@ -0,0 +1,39 @@
// Copyright 2019 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 !go1.13
package poly1305
// Generic fallbacks for the math/bits intrinsics, copied from
// src/math/bits/bits.go. They were added in Go 1.12, but Add64 and Sum64 had
// variable time fallbacks until Go 1.13.
func bitsAdd64(x, y, carry uint64) (sum, carryOut uint64) {
sum = x + y + carry
carryOut = ((x & y) | ((x | y) &^ sum)) >> 63
return
}
func bitsSub64(x, y, borrow uint64) (diff, borrowOut uint64) {
diff = x - y - borrow
borrowOut = ((^x & y) | (^(x ^ y) & diff)) >> 63
return
}
func bitsMul64(x, y uint64) (hi, lo uint64) {
const mask32 = 1<<32 - 1
x0 := x & mask32
x1 := x >> 32
y0 := y & mask32
y1 := y >> 32
w0 := x0 * y0
t := x1*y0 + w0>>32
w1 := t & mask32
w2 := t >> 32
w1 += x0 * y1
hi = x1*y1 + w2 + w1>>32
lo = x * y
return
}

21
vendor/golang.org/x/crypto/poly1305/bits_go1.13.go generated vendored Normal file
View File

@@ -0,0 +1,21 @@
// Copyright 2019 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 go1.13
package poly1305
import "math/bits"
func bitsAdd64(x, y, carry uint64) (sum, carryOut uint64) {
return bits.Add64(x, y, carry)
}
func bitsSub64(x, y, borrow uint64) (diff, borrowOut uint64) {
return bits.Sub64(x, y, borrow)
}
func bitsMul64(x, y uint64) (hi, lo uint64) {
return bits.Mul64(x, y)
}

4
vendor/golang.org/x/crypto/poly1305/mac_noasm.go generated vendored
View File

@@ -2,10 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !amd64 gccgo appengine
// +build !amd64,!ppc64le,!s390x gccgo purego
package poly1305
type mac struct{ macGeneric }
func newMAC(key *[32]byte) mac { return mac{newMACGeneric(key)} }

34
vendor/golang.org/x/crypto/poly1305/poly1305.go generated vendored
View File

@@ -22,8 +22,16 @@ 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.
// Sum generates an authenticator for msg 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) {
h := New(key)
h.Write(m)
h.Sum(out[:0])
}
// 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)
@@ -40,10 +48,9 @@ func Verify(mac *[16]byte, m []byte, key *[32]byte) bool {
// two different messages with the same key allows an attacker
// to forge messages at will.
func New(key *[32]byte) *MAC {
return &MAC{
mac: newMAC(key),
finalized: false,
}
m := &MAC{}
initialize(key, &m.macState)
return m
}
// MAC is an io.Writer computing an authentication tag
@@ -52,7 +59,7 @@ func New(key *[32]byte) *MAC {
// MAC cannot be used like common hash.Hash implementations,
// because using a poly1305 key twice breaks its security.
// Therefore writing data to a running MAC after calling
// Sum causes it to panic.
// Sum or Verify causes it to panic.
type MAC struct {
mac // platform-dependent implementation
@@ -65,10 +72,10 @@ func (h *MAC) Size() int { return TagSize }
// Write adds more data to the running message authentication code.
// It never returns an error.
//
// It must not be called after the first call of Sum.
// It must not be called after the first call of Sum or Verify.
func (h *MAC) Write(p []byte) (n int, err error) {
if h.finalized {
panic("poly1305: write to MAC after Sum")
panic("poly1305: write to MAC after Sum or Verify")
}
return h.mac.Write(p)
}
@@ -81,3 +88,12 @@ func (h *MAC) Sum(b []byte) []byte {
h.finalized = true
return append(b, mac[:]...)
}
// Verify returns whether the authenticator of all data written to
// the message authentication code matches the expected value.
func (h *MAC) Verify(expected []byte) bool {
var mac [TagSize]byte
h.mac.Sum(&mac)
h.finalized = true
return subtle.ConstantTimeCompare(expected, mac[:]) == 1
}

65
vendor/golang.org/x/crypto/poly1305/sum_amd64.go generated vendored
View File

@@ -2,67 +2,46 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine
// +build !gccgo,!purego
package poly1305
//go:noescape
func initialize(state *[7]uint64, key *[32]byte)
func update(state *macState, msg []byte)
//go:noescape
func update(state *[7]uint64, msg []byte)
// mac is a wrapper for macGeneric that redirects calls that would have gone to
// updateGeneric to update.
//
// Its Write and Sum methods are otherwise identical to the macGeneric ones, but
// using function pointers would carry a major performance cost.
type mac struct{ macGeneric }
//go:noescape
func finalize(tag *[TagSize]byte, state *[7]uint64)
// 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) {
h := newMAC(key)
h.Write(m)
h.Sum(out)
}
func newMAC(key *[32]byte) (h mac) {
initialize(&h.state, key)
return
}
type mac struct {
state [7]uint64 // := uint64{ h0, h1, h2, r0, r1, pad0, pad1 }
buffer [TagSize]byte
offset int
}
func (h *mac) Write(p []byte) (n int, err error) {
n = len(p)
func (h *mac) Write(p []byte) (int, error) {
nn := len(p)
if h.offset > 0 {
remaining := TagSize - h.offset
if n < remaining {
h.offset += copy(h.buffer[h.offset:], p)
return n, nil
n := copy(h.buffer[h.offset:], p)
if h.offset+n < TagSize {
h.offset += n
return nn, nil
}
copy(h.buffer[h.offset:], p[:remaining])
p = p[remaining:]
p = p[n:]
h.offset = 0
update(&h.state, h.buffer[:])
update(&h.macState, h.buffer[:])
}
if nn := len(p) - (len(p) % TagSize); nn > 0 {
update(&h.state, p[:nn])
p = p[nn:]
if n := len(p) - (len(p) % TagSize); n > 0 {
update(&h.macState, p[:n])
p = p[n:]
}
if len(p) > 0 {
h.offset += copy(h.buffer[h.offset:], p)
}
return n, nil
return nn, nil
}
func (h *mac) Sum(out *[16]byte) {
state := h.state
state := h.macState
if h.offset > 0 {
update(&state, h.buffer[:h.offset])
}
finalize(out, &state)
finalize(out, &state.h, &state.s)
}

42
vendor/golang.org/x/crypto/poly1305/sum_amd64.s generated vendored
View File

@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine
// +build !gccgo,!purego
#include "textflag.h"
@@ -54,10 +54,6 @@
ADCQ t3, h1; \
ADCQ $0, h2
DATA ·poly1305Mask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF
DATA ·poly1305Mask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC
GLOBL ·poly1305Mask<>(SB), RODATA, $16
// func update(state *[7]uint64, msg []byte)
TEXT ·update(SB), $0-32
MOVQ state+0(FP), DI
@@ -110,39 +106,3 @@ done:
MOVQ R9, 8(DI)
MOVQ R10, 16(DI)
RET
// func initialize(state *[7]uint64, key *[32]byte)
TEXT ·initialize(SB), $0-16
MOVQ state+0(FP), DI
MOVQ key+8(FP), SI
// state[0...7] is initialized with zero
MOVOU 0(SI), X0
MOVOU 16(SI), X1
MOVOU ·poly1305Mask<>(SB), X2
PAND X2, X0
MOVOU X0, 24(DI)
MOVOU X1, 40(DI)
RET
// func finalize(tag *[TagSize]byte, state *[7]uint64)
TEXT ·finalize(SB), $0-16
MOVQ tag+0(FP), DI
MOVQ state+8(FP), SI
MOVQ 0(SI), AX
MOVQ 8(SI), BX
MOVQ 16(SI), CX
MOVQ AX, R8
MOVQ BX, R9
SUBQ $0xFFFFFFFFFFFFFFFB, AX
SBBQ $0xFFFFFFFFFFFFFFFF, BX
SBBQ $3, CX
CMOVQCS R8, AX
CMOVQCS R9, BX
ADDQ 40(SI), AX
ADCQ 48(SI), BX
MOVQ AX, 0(DI)
MOVQ BX, 8(DI)
RET

374
vendor/golang.org/x/crypto/poly1305/sum_generic.go generated vendored
View File

@@ -2,171 +2,309 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file provides the generic implementation of Sum and MAC. Other files
// might provide optimized assembly implementations of some of this code.
package poly1305
import "encoding/binary"
const (
msgBlock = uint32(1 << 24)
finalBlock = uint32(0)
)
// Poly1305 [RFC 7539] is a relatively simple algorithm: the authentication tag
// for a 64 bytes message is approximately
//
// s + m[0:16] * r⁴ + m[16:32] * r³ + m[32:48] * r² + m[48:64] * r mod 2¹³⁰ - 5
//
// for some secret r and s. It can be computed sequentially like
//
// for len(msg) > 0:
// h += read(msg, 16)
// h *= r
// h %= 2¹³⁰ - 5
// return h + s
//
// All the complexity is about doing performant constant-time math on numbers
// larger than any available numeric type.
// sumGeneric generates an authenticator for msg using a one-time key and
// puts the 16-byte result into out. This is the generic implementation of
// Sum and should be called if no assembly implementation is available.
func sumGeneric(out *[TagSize]byte, msg []byte, key *[32]byte) {
h := newMACGeneric(key)
h.Write(msg)
h.Sum(out)
}
func newMACGeneric(key *[32]byte) (h macGeneric) {
h.r[0] = binary.LittleEndian.Uint32(key[0:]) & 0x3ffffff
h.r[1] = (binary.LittleEndian.Uint32(key[3:]) >> 2) & 0x3ffff03
h.r[2] = (binary.LittleEndian.Uint32(key[6:]) >> 4) & 0x3ffc0ff
h.r[3] = (binary.LittleEndian.Uint32(key[9:]) >> 6) & 0x3f03fff
h.r[4] = (binary.LittleEndian.Uint32(key[12:]) >> 8) & 0x00fffff
func newMACGeneric(key *[32]byte) macGeneric {
m := macGeneric{}
initialize(key, &m.macState)
return m
}
h.s[0] = binary.LittleEndian.Uint32(key[16:])
h.s[1] = binary.LittleEndian.Uint32(key[20:])
h.s[2] = binary.LittleEndian.Uint32(key[24:])
h.s[3] = binary.LittleEndian.Uint32(key[28:])
return
// macState holds numbers in saturated 64-bit little-endian limbs. That is,
// the value of [x0, x1, x2] is x[0] + x[1] * 2⁶⁴ + x[2] * 2¹²⁸.
type macState struct {
// h is the main accumulator. It is to be interpreted modulo 2¹³⁰ - 5, but
// can grow larger during and after rounds. It must, however, remain below
// 2 * (2¹³⁰ - 5).
h [3]uint64
// r and s are the private key components.
r [2]uint64
s [2]uint64
}
type macGeneric struct {
h, r [5]uint32
s [4]uint32
macState
buffer [TagSize]byte
offset int
}
func (h *macGeneric) Write(p []byte) (n int, err error) {
n = len(p)
// Write splits the incoming message into TagSize chunks, and passes them to
// update. It buffers incomplete chunks.
func (h *macGeneric) Write(p []byte) (int, error) {
nn := len(p)
if h.offset > 0 {
remaining := TagSize - h.offset
if n < remaining {
h.offset += copy(h.buffer[h.offset:], p)
return n, nil
n := copy(h.buffer[h.offset:], p)
if h.offset+n < TagSize {
h.offset += n
return nn, nil
}
copy(h.buffer[h.offset:], p[:remaining])
p = p[remaining:]
p = p[n:]
h.offset = 0
updateGeneric(h.buffer[:], msgBlock, &(h.h), &(h.r))
updateGeneric(&h.macState, h.buffer[:])
}
if nn := len(p) - (len(p) % TagSize); nn > 0 {
updateGeneric(p, msgBlock, &(h.h), &(h.r))
p = p[nn:]
if n := len(p) - (len(p) % TagSize); n > 0 {
updateGeneric(&h.macState, p[:n])
p = p[n:]
}
if len(p) > 0 {
h.offset += copy(h.buffer[h.offset:], p)
}
return n, nil
return nn, nil
}
func (h *macGeneric) Sum(out *[16]byte) {
H, R := h.h, h.r
// Sum flushes the last incomplete chunk from the buffer, if any, and generates
// the MAC output. It does not modify its state, in order to allow for multiple
// calls to Sum, even if no Write is allowed after Sum.
func (h *macGeneric) Sum(out *[TagSize]byte) {
state := h.macState
if h.offset > 0 {
var buffer [TagSize]byte
copy(buffer[:], h.buffer[:h.offset])
buffer[h.offset] = 1 // invariant: h.offset < TagSize
updateGeneric(buffer[:], finalBlock, &H, &R)
updateGeneric(&state, h.buffer[:h.offset])
}
finalizeGeneric(out, &H, &(h.s))
finalize(out, &state.h, &state.s)
}
func updateGeneric(msg []byte, flag uint32, h, r *[5]uint32) {
h0, h1, h2, h3, h4 := h[0], h[1], h[2], h[3], h[4]
r0, r1, r2, r3, r4 := uint64(r[0]), uint64(r[1]), uint64(r[2]), uint64(r[3]), uint64(r[4])
R1, R2, R3, R4 := r1*5, r2*5, r3*5, r4*5
// [rMask0, rMask1] is the specified Poly1305 clamping mask in little-endian. It
// clears some bits of the secret coefficient to make it possible to implement
// multiplication more efficiently.
const (
rMask0 = 0x0FFFFFFC0FFFFFFF
rMask1 = 0x0FFFFFFC0FFFFFFC
)
for len(msg) >= TagSize {
// h += msg
h0 += binary.LittleEndian.Uint32(msg[0:]) & 0x3ffffff
h1 += (binary.LittleEndian.Uint32(msg[3:]) >> 2) & 0x3ffffff
h2 += (binary.LittleEndian.Uint32(msg[6:]) >> 4) & 0x3ffffff
h3 += (binary.LittleEndian.Uint32(msg[9:]) >> 6) & 0x3ffffff
h4 += (binary.LittleEndian.Uint32(msg[12:]) >> 8) | flag
// initialize loads the 256-bit key into the two 128-bit secret values r and s.
func initialize(key *[32]byte, m *macState) {
m.r[0] = binary.LittleEndian.Uint64(key[0:8]) & rMask0
m.r[1] = binary.LittleEndian.Uint64(key[8:16]) & rMask1
m.s[0] = binary.LittleEndian.Uint64(key[16:24])
m.s[1] = binary.LittleEndian.Uint64(key[24:32])
}
// h *= r
d0 := (uint64(h0) * r0) + (uint64(h1) * R4) + (uint64(h2) * R3) + (uint64(h3) * R2) + (uint64(h4) * R1)
d1 := (d0 >> 26) + (uint64(h0) * r1) + (uint64(h1) * r0) + (uint64(h2) * R4) + (uint64(h3) * R3) + (uint64(h4) * R2)
d2 := (d1 >> 26) + (uint64(h0) * r2) + (uint64(h1) * r1) + (uint64(h2) * r0) + (uint64(h3) * R4) + (uint64(h4) * R3)
d3 := (d2 >> 26) + (uint64(h0) * r3) + (uint64(h1) * r2) + (uint64(h2) * r1) + (uint64(h3) * r0) + (uint64(h4) * R4)
d4 := (d3 >> 26) + (uint64(h0) * r4) + (uint64(h1) * r3) + (uint64(h2) * r2) + (uint64(h3) * r1) + (uint64(h4) * r0)
// uint128 holds a 128-bit number as two 64-bit limbs, for use with the
// bits.Mul64 and bits.Add64 intrinsics.
type uint128 struct {
lo, hi uint64
}
// h %= p
h0 = uint32(d0) & 0x3ffffff
h1 = uint32(d1) & 0x3ffffff
h2 = uint32(d2) & 0x3ffffff
h3 = uint32(d3) & 0x3ffffff
h4 = uint32(d4) & 0x3ffffff
func mul64(a, b uint64) uint128 {
hi, lo := bitsMul64(a, b)
return uint128{lo, hi}
}
h0 += uint32(d4>>26) * 5
h1 += h0 >> 26
h0 = h0 & 0x3ffffff
func add128(a, b uint128) uint128 {
lo, c := bitsAdd64(a.lo, b.lo, 0)
hi, c := bitsAdd64(a.hi, b.hi, c)
if c != 0 {
panic("poly1305: unexpected overflow")
}
return uint128{lo, hi}
}
msg = msg[TagSize:]
func shiftRightBy2(a uint128) uint128 {
a.lo = a.lo>>2 | (a.hi&3)<<62
a.hi = a.hi >> 2
return a
}
// updateGeneric absorbs msg into the state.h accumulator. For each chunk m of
// 128 bits of message, it computes
//
// h₊ = (h + m) * r mod 2¹³⁰ - 5
//
// If the msg length is not a multiple of TagSize, it assumes the last
// incomplete chunk is the final one.
func updateGeneric(state *macState, msg []byte) {
h0, h1, h2 := state.h[0], state.h[1], state.h[2]
r0, r1 := state.r[0], state.r[1]
for len(msg) > 0 {
var c uint64
// For the first step, h + m, we use a chain of bits.Add64 intrinsics.
// The resulting value of h might exceed 2¹³⁰ - 5, but will be partially
// reduced at the end of the multiplication below.
//
// The spec requires us to set a bit just above the message size, not to
// hide leading zeroes. For full chunks, that's 1 << 128, so we can just
// add 1 to the most significant (2¹²⁸) limb, h2.
if len(msg) >= TagSize {
h0, c = bitsAdd64(h0, binary.LittleEndian.Uint64(msg[0:8]), 0)
h1, c = bitsAdd64(h1, binary.LittleEndian.Uint64(msg[8:16]), c)
h2 += c + 1
msg = msg[TagSize:]
} else {
var buf [TagSize]byte
copy(buf[:], msg)
buf[len(msg)] = 1
h0, c = bitsAdd64(h0, binary.LittleEndian.Uint64(buf[0:8]), 0)
h1, c = bitsAdd64(h1, binary.LittleEndian.Uint64(buf[8:16]), c)
h2 += c
msg = nil
}
// Multiplication of big number limbs is similar to elementary school
// columnar multiplication. Instead of digits, there are 64-bit limbs.
//
// We are multiplying a 3 limbs number, h, by a 2 limbs number, r.
//
// h2 h1 h0 x
// r1 r0 =
// ----------------
// h2r0 h1r0 h0r0 <-- individual 128-bit products
// + h2r1 h1r1 h0r1
// ------------------------
// m3 m2 m1 m0 <-- result in 128-bit overlapping limbs
// ------------------------
// m3.hi m2.hi m1.hi m0.hi <-- carry propagation
// + m3.lo m2.lo m1.lo m0.lo
// -------------------------------
// t4 t3 t2 t1 t0 <-- final result in 64-bit limbs
//
// The main difference from pen-and-paper multiplication is that we do
// carry propagation in a separate step, as if we wrote two digit sums
// at first (the 128-bit limbs), and then carried the tens all at once.
h0r0 := mul64(h0, r0)
h1r0 := mul64(h1, r0)
h2r0 := mul64(h2, r0)
h0r1 := mul64(h0, r1)
h1r1 := mul64(h1, r1)
h2r1 := mul64(h2, r1)
// Since h2 is known to be at most 7 (5 + 1 + 1), and r0 and r1 have their
// top 4 bits cleared by rMask{0,1}, we know that their product is not going
// to overflow 64 bits, so we can ignore the high part of the products.
//
// This also means that the product doesn't have a fifth limb (t4).
if h2r0.hi != 0 {
panic("poly1305: unexpected overflow")
}
if h2r1.hi != 0 {
panic("poly1305: unexpected overflow")
}
m0 := h0r0
m1 := add128(h1r0, h0r1) // These two additions don't overflow thanks again
m2 := add128(h2r0, h1r1) // to the 4 masked bits at the top of r0 and r1.
m3 := h2r1
t0 := m0.lo
t1, c := bitsAdd64(m1.lo, m0.hi, 0)
t2, c := bitsAdd64(m2.lo, m1.hi, c)
t3, _ := bitsAdd64(m3.lo, m2.hi, c)
// Now we have the result as 4 64-bit limbs, and we need to reduce it
// modulo 2¹³⁰ - 5. The special shape of this Crandall prime lets us do
// a cheap partial reduction according to the reduction identity
//
// c * 2¹³⁰ + n = c * 5 + n mod 2¹³⁰ - 5
//
// because 2¹³⁰ = 5 mod 2¹³⁰ - 5. Partial reduction since the result is
// likely to be larger than 2¹³⁰ - 5, but still small enough to fit the
// assumptions we make about h in the rest of the code.
//
// See also https://speakerdeck.com/gtank/engineering-prime-numbers?slide=23
// We split the final result at the 2¹³⁰ mark into h and cc, the carry.
// Note that the carry bits are effectively shifted left by 2, in other
// words, cc = c * 4 for the c in the reduction identity.
h0, h1, h2 = t0, t1, t2&maskLow2Bits
cc := uint128{t2 & maskNotLow2Bits, t3}
// To add c * 5 to h, we first add cc = c * 4, and then add (cc >> 2) = c.
h0, c = bitsAdd64(h0, cc.lo, 0)
h1, c = bitsAdd64(h1, cc.hi, c)
h2 += c
cc = shiftRightBy2(cc)
h0, c = bitsAdd64(h0, cc.lo, 0)
h1, c = bitsAdd64(h1, cc.hi, c)
h2 += c
// h2 is at most 3 + 1 + 1 = 5, making the whole of h at most
//
// 5 * 2¹²⁸ + (2¹²⁸ - 1) = 6 * 2¹²⁸ - 1
}
h[0], h[1], h[2], h[3], h[4] = h0, h1, h2, h3, h4
state.h[0], state.h[1], state.h[2] = h0, h1, h2
}
func finalizeGeneric(out *[TagSize]byte, h *[5]uint32, s *[4]uint32) {
h0, h1, h2, h3, h4 := h[0], h[1], h[2], h[3], h[4]
const (
maskLow2Bits uint64 = 0x0000000000000003
maskNotLow2Bits uint64 = ^maskLow2Bits
)
// h %= p reduction
h2 += h1 >> 26
h1 &= 0x3ffffff
h3 += h2 >> 26
h2 &= 0x3ffffff
h4 += h3 >> 26
h3 &= 0x3ffffff
h0 += 5 * (h4 >> 26)
h4 &= 0x3ffffff
h1 += h0 >> 26
h0 &= 0x3ffffff
// select64 returns x if v == 1 and y if v == 0, in constant time.
func select64(v, x, y uint64) uint64 { return ^(v-1)&x | (v-1)&y }
// h - p
t0 := h0 + 5
t1 := h1 + (t0 >> 26)
t2 := h2 + (t1 >> 26)
t3 := h3 + (t2 >> 26)
t4 := h4 + (t3 >> 26) - (1 << 26)
t0 &= 0x3ffffff
t1 &= 0x3ffffff
t2 &= 0x3ffffff
t3 &= 0x3ffffff
// [p0, p1, p2] is 2¹³⁰ - 5 in little endian order.
const (
p0 = 0xFFFFFFFFFFFFFFFB
p1 = 0xFFFFFFFFFFFFFFFF
p2 = 0x0000000000000003
)
// select h if h < p else h - p
t_mask := (t4 >> 31) - 1
h_mask := ^t_mask
h0 = (h0 & h_mask) | (t0 & t_mask)
h1 = (h1 & h_mask) | (t1 & t_mask)
h2 = (h2 & h_mask) | (t2 & t_mask)
h3 = (h3 & h_mask) | (t3 & t_mask)
h4 = (h4 & h_mask) | (t4 & t_mask)
// finalize completes the modular reduction of h and computes
//
// out = h + s mod 2¹²⁸
//
func finalize(out *[TagSize]byte, h *[3]uint64, s *[2]uint64) {
h0, h1, h2 := h[0], h[1], h[2]
// h %= 2^128
h0 |= h1 << 26
h1 = ((h1 >> 6) | (h2 << 20))
h2 = ((h2 >> 12) | (h3 << 14))
h3 = ((h3 >> 18) | (h4 << 8))
// After the partial reduction in updateGeneric, h might be more than
// 2¹³⁰ - 5, but will be less than 2 * (2¹³⁰ - 5). To complete the reduction
// in constant time, we compute t = h - (2¹³⁰ - 5), and select h as the
// result if the subtraction underflows, and t otherwise.
// s: the s part of the key
// tag = (h + s) % (2^128)
t := uint64(h0) + uint64(s[0])
h0 = uint32(t)
t = uint64(h1) + uint64(s[1]) + (t >> 32)
h1 = uint32(t)
t = uint64(h2) + uint64(s[2]) + (t >> 32)
h2 = uint32(t)
t = uint64(h3) + uint64(s[3]) + (t >> 32)
h3 = uint32(t)
hMinusP0, b := bitsSub64(h0, p0, 0)
hMinusP1, b := bitsSub64(h1, p1, b)
_, b = bitsSub64(h2, p2, b)
binary.LittleEndian.PutUint32(out[0:], h0)
binary.LittleEndian.PutUint32(out[4:], h1)
binary.LittleEndian.PutUint32(out[8:], h2)
binary.LittleEndian.PutUint32(out[12:], h3)
// h = h if h < p else h - p
h0 = select64(b, h0, hMinusP0)
h1 = select64(b, h1, hMinusP1)
// Finally, we compute the last Poly1305 step
//
// tag = h + s mod 2¹²⁸
//
// by just doing a wide addition with the 128 low bits of h and discarding
// the overflow.
h0, c := bitsAdd64(h0, s[0], 0)
h1, _ = bitsAdd64(h1, s[1], c)
binary.LittleEndian.PutUint64(out[0:8], h0)
binary.LittleEndian.PutUint64(out[8:16], h1)
}

47
vendor/golang.org/x/crypto/poly1305/sum_ppc64le.go generated vendored Normal file
View File

@@ -0,0 +1,47 @@
// Copyright 2019 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 !gccgo,!purego
package poly1305
//go:noescape
func update(state *macState, msg []byte)
// mac is a wrapper for macGeneric that redirects calls that would have gone to
// updateGeneric to update.
//
// Its Write and Sum methods are otherwise identical to the macGeneric ones, but
// using function pointers would carry a major performance cost.
type mac struct{ macGeneric }
func (h *mac) Write(p []byte) (int, error) {
nn := len(p)
if h.offset > 0 {
n := copy(h.buffer[h.offset:], p)
if h.offset+n < TagSize {
h.offset += n
return nn, nil
}
p = p[n:]
h.offset = 0
update(&h.macState, h.buffer[:])
}
if n := len(p) - (len(p) % TagSize); n > 0 {
update(&h.macState, p[:n])
p = p[n:]
}
if len(p) > 0 {
h.offset += copy(h.buffer[h.offset:], p)
}
return nn, nil
}
func (h *mac) Sum(out *[16]byte) {
state := h.macState
if h.offset > 0 {
update(&state, h.buffer[:h.offset])
}
finalize(out, &state.h, &state.s)
}

181
vendor/golang.org/x/crypto/poly1305/sum_ppc64le.s generated vendored Normal file
View File

@@ -0,0 +1,181 @@
// Copyright 2019 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 !gccgo,!purego
#include "textflag.h"
// This was ported from the amd64 implementation.
#define POLY1305_ADD(msg, h0, h1, h2, t0, t1, t2) \
MOVD (msg), t0; \
MOVD 8(msg), t1; \
MOVD $1, t2; \
ADDC t0, h0, h0; \
ADDE t1, h1, h1; \
ADDE t2, h2; \
ADD $16, msg
#define POLY1305_MUL(h0, h1, h2, r0, r1, t0, t1, t2, t3, t4, t5) \
MULLD r0, h0, t0; \
MULLD r0, h1, t4; \
MULHDU r0, h0, t1; \
MULHDU r0, h1, t5; \
ADDC t4, t1, t1; \
MULLD r0, h2, t2; \
ADDZE t5; \
MULHDU r1, h0, t4; \
MULLD r1, h0, h0; \
ADD t5, t2, t2; \
ADDC h0, t1, t1; \
MULLD h2, r1, t3; \
ADDZE t4, h0; \
MULHDU r1, h1, t5; \
MULLD r1, h1, t4; \
ADDC t4, t2, t2; \
ADDE t5, t3, t3; \
ADDC h0, t2, t2; \
MOVD $-4, t4; \
MOVD t0, h0; \
MOVD t1, h1; \
ADDZE t3; \
ANDCC $3, t2, h2; \
AND t2, t4, t0; \
ADDC t0, h0, h0; \
ADDE t3, h1, h1; \
SLD $62, t3, t4; \
SRD $2, t2; \
ADDZE h2; \
OR t4, t2, t2; \
SRD $2, t3; \
ADDC t2, h0, h0; \
ADDE t3, h1, h1; \
ADDZE h2
DATA ·poly1305Mask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF
DATA ·poly1305Mask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC
GLOBL ·poly1305Mask<>(SB), RODATA, $16
// func update(state *[7]uint64, msg []byte)
TEXT ·update(SB), $0-32
MOVD state+0(FP), R3
MOVD msg_base+8(FP), R4
MOVD msg_len+16(FP), R5
MOVD 0(R3), R8 // h0
MOVD 8(R3), R9 // h1
MOVD 16(R3), R10 // h2
MOVD 24(R3), R11 // r0
MOVD 32(R3), R12 // r1
CMP R5, $16
BLT bytes_between_0_and_15
loop:
POLY1305_ADD(R4, R8, R9, R10, R20, R21, R22)
multiply:
POLY1305_MUL(R8, R9, R10, R11, R12, R16, R17, R18, R14, R20, R21)
ADD $-16, R5
CMP R5, $16
BGE loop
bytes_between_0_and_15:
CMP $0, R5
BEQ done
MOVD $0, R16 // h0
MOVD $0, R17 // h1
flush_buffer:
CMP R5, $8
BLE just1
MOVD $8, R21
SUB R21, R5, R21
// Greater than 8 -- load the rightmost remaining bytes in msg
// and put into R17 (h1)
MOVD (R4)(R21), R17
MOVD $16, R22
// Find the offset to those bytes
SUB R5, R22, R22
SLD $3, R22
// Shift to get only the bytes in msg
SRD R22, R17, R17
// Put 1 at high end
MOVD $1, R23
SLD $3, R21
SLD R21, R23, R23
OR R23, R17, R17
// Remainder is 8
MOVD $8, R5
just1:
CMP R5, $8
BLT less8
// Exactly 8
MOVD (R4), R16
CMP $0, R17
// Check if we've already set R17; if not
// set 1 to indicate end of msg.
BNE carry
MOVD $1, R17
BR carry
less8:
MOVD $0, R16 // h0
MOVD $0, R22 // shift count
CMP R5, $4
BLT less4
MOVWZ (R4), R16
ADD $4, R4
ADD $-4, R5
MOVD $32, R22
less4:
CMP R5, $2
BLT less2
MOVHZ (R4), R21
SLD R22, R21, R21
OR R16, R21, R16
ADD $16, R22
ADD $-2, R5
ADD $2, R4
less2:
CMP $0, R5
BEQ insert1
MOVBZ (R4), R21
SLD R22, R21, R21
OR R16, R21, R16
ADD $8, R22
insert1:
// Insert 1 at end of msg
MOVD $1, R21
SLD R22, R21, R21
OR R16, R21, R16
carry:
// Add new values to h0, h1, h2
ADDC R16, R8
ADDE R17, R9
ADDE $0, R10
MOVD $16, R5
ADD R5, R4
BR multiply
done:
// Save h0, h1, h2 in state
MOVD R8, 0(R3)
MOVD R9, 8(R3)
MOVD R10, 16(R3)
RET

83
vendor/golang.org/x/crypto/poly1305/sum_s390x.go generated vendored
View File

@@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build s390x,go1.11,!gccgo,!appengine
// +build !gccgo,!purego
package poly1305
@@ -10,33 +10,66 @@ import (
"golang.org/x/sys/cpu"
)
// poly1305vx is an assembly implementation of Poly1305 that uses vector
// updateVX is an assembly implementation of Poly1305 that uses vector
// instructions. It must only be called if the vector facility (vx) is
// available.
//go:noescape
func poly1305vx(out *[16]byte, m *byte, mlen uint64, key *[32]byte)
func updateVX(state *macState, msg []byte)
// poly1305vmsl is an assembly implementation of Poly1305 that uses vector
// instructions, including VMSL. It must only be called if the vector facility (vx) is
// available and if VMSL is supported.
//go:noescape
func poly1305vmsl(out *[16]byte, m *byte, mlen uint64, key *[32]byte)
// mac is a replacement for macGeneric that uses a larger buffer and redirects
// calls that would have gone to updateGeneric to updateVX if the vector
// facility is installed.
//
// A larger buffer is required for good performance because the vector
// implementation has a higher fixed cost per call than the generic
// implementation.
type mac struct {
macState
// 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) {
if cpu.S390X.HasVX {
var mPtr *byte
if len(m) > 0 {
mPtr = &m[0]
}
if cpu.S390X.HasVXE && len(m) > 256 {
poly1305vmsl(out, mPtr, uint64(len(m)), key)
} else {
poly1305vx(out, mPtr, uint64(len(m)), key)
}
} else {
sumGeneric(out, m, key)
}
buffer [16 * TagSize]byte // size must be a multiple of block size (16)
offset int
}
func (h *mac) Write(p []byte) (int, error) {
nn := len(p)
if h.offset > 0 {
n := copy(h.buffer[h.offset:], p)
if h.offset+n < len(h.buffer) {
h.offset += n
return nn, nil
}
p = p[n:]
h.offset = 0
if cpu.S390X.HasVX {
updateVX(&h.macState, h.buffer[:])
} else {
updateGeneric(&h.macState, h.buffer[:])
}
}
tail := len(p) % len(h.buffer) // number of bytes to copy into buffer
body := len(p) - tail // number of bytes to process now
if body > 0 {
if cpu.S390X.HasVX {
updateVX(&h.macState, p[:body])
} else {
updateGeneric(&h.macState, p[:body])
}
}
h.offset = copy(h.buffer[:], p[body:]) // copy tail bytes - can be 0
return nn, nil
}
func (h *mac) Sum(out *[TagSize]byte) {
state := h.macState
remainder := h.buffer[:h.offset]
// Use the generic implementation if we have 2 or fewer blocks left
// to sum. The vector implementation has a higher startup time.
if cpu.S390X.HasVX && len(remainder) > 2*TagSize {
updateVX(&state, remainder)
} else if len(remainder) > 0 {
updateGeneric(&state, remainder)
}
finalize(out, &state.h, &state.s)
}

633
vendor/golang.org/x/crypto/poly1305/sum_s390x.s generated vendored
View File

@@ -2,115 +2,187 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build s390x,go1.11,!gccgo,!appengine
// +build !gccgo,!purego
#include "textflag.h"
// Implementation of Poly1305 using the vector facility (vx).
// This implementation of Poly1305 uses the vector facility (vx)
// to process up to 2 blocks (32 bytes) per iteration using an
// algorithm based on the one described in:
//
// NEON crypto, Daniel J. Bernstein & Peter Schwabe
// https://cryptojedi.org/papers/neoncrypto-20120320.pdf
//
// This algorithm uses 5 26-bit limbs to represent a 130-bit
// value. These limbs are, for the most part, zero extended and
// placed into 64-bit vector register elements. Each vector
// register is 128-bits wide and so holds 2 of these elements.
// Using 26-bit limbs allows us plenty of headroom to accomodate
// accumulations before and after multiplication without
// overflowing either 32-bits (before multiplication) or 64-bits
// (after multiplication).
//
// In order to parallelise the operations required to calculate
// the sum we use two separate accumulators and then sum those
// in an extra final step. For compatibility with the generic
// implementation we perform this summation at the end of every
// updateVX call.
//
// To use two accumulators we must multiply the message blocks
// by r² rather than r. Only the final message block should be
// multiplied by r.
//
// Example:
//
// We want to calculate the sum (h) for a 64 byte message (m):
//
// h = m[0:16]r⁴ + m[16:32]r³ + m[32:48]r² + m[48:64]r
//
// To do this we split the calculation into the even indices
// and odd indices of the message. These form our SIMD 'lanes':
//
// h = m[ 0:16]r⁴ + m[32:48]r² + <- lane 0
// m[16:32]r³ + m[48:64]r <- lane 1
//
// To calculate this iteratively we refactor so that both lanes
// are written in terms of r² and r:
//
// h = (m[ 0:16]r² + m[32:48])r² + <- lane 0
// (m[16:32]r² + m[48:64])r <- lane 1
// ^ ^
// | coefficients for second iteration
// coefficients for first iteration
//
// So in this case we would have two iterations. In the first
// both lanes are multiplied by r². In the second only the
// first lane is multiplied by r² and the second lane is
// instead multiplied by r. This gives use the odd and even
// powers of r that we need from the original equation.
//
// Notation:
//
// h - accumulator
// r - key
// m - message
//
// [a, b] - SIMD register holding two 64-bit values
// [a, b, c, d] - SIMD register holding four 32-bit values
// xᵢ[n] - limb n of variable x with bit width i
//
// Limbs are expressed in little endian order, so for 26-bit
// limbs x₂₆[4] will be the most significant limb and x₂₆[0]
// will be the least significant limb.
// constants
#define MOD26 V0
#define EX0 V1
#define EX1 V2
#define EX2 V3
// masking constants
#define MOD24 V0 // [0x0000000000ffffff, 0x0000000000ffffff] - mask low 24-bits
#define MOD26 V1 // [0x0000000003ffffff, 0x0000000003ffffff] - mask low 26-bits
// temporaries
#define T_0 V4
#define T_1 V5
#define T_2 V6
#define T_3 V7
#define T_4 V8
// expansion constants (see EXPAND macro)
#define EX0 V2
#define EX1 V3
#define EX2 V4
// key (r)
#define R_0 V9
#define R_1 V10
#define R_2 V11
#define R_3 V12
#define R_4 V13
#define R5_1 V14
#define R5_2 V15
#define R5_3 V16
#define R5_4 V17
#define RSAVE_0 R5
#define RSAVE_1 R6
#define RSAVE_2 R7
#define RSAVE_3 R8
#define RSAVE_4 R9
#define R5SAVE_1 V28
#define R5SAVE_2 V29
#define R5SAVE_3 V30
#define R5SAVE_4 V31
// key (r², r or 1 depending on context)
#define R_0 V5
#define R_1 V6
#define R_2 V7
#define R_3 V8
#define R_4 V9
// message block
#define F_0 V18
#define F_1 V19
#define F_2 V20
#define F_3 V21
#define F_4 V22
// precalculated coefficients (5r², 5r or 0 depending on context)
#define R5_1 V10
#define R5_2 V11
#define R5_3 V12
#define R5_4 V13
// accumulator
#define H_0 V23
#define H_1 V24
#define H_2 V25
#define H_3 V26
#define H_4 V27
// message block (m)
#define M_0 V14
#define M_1 V15
#define M_2 V16
#define M_3 V17
#define M_4 V18
GLOBL ·keyMask<>(SB), RODATA, $16
DATA ·keyMask<>+0(SB)/8, $0xffffff0ffcffff0f
DATA ·keyMask<>+8(SB)/8, $0xfcffff0ffcffff0f
// accumulator (h)
#define H_0 V19
#define H_1 V20
#define H_2 V21
#define H_3 V22
#define H_4 V23
GLOBL ·bswapMask<>(SB), RODATA, $16
DATA ·bswapMask<>+0(SB)/8, $0x0f0e0d0c0b0a0908
DATA ·bswapMask<>+8(SB)/8, $0x0706050403020100
// temporary registers (for short-lived values)
#define T_0 V24
#define T_1 V25
#define T_2 V26
#define T_3 V27
#define T_4 V28
GLOBL ·constants<>(SB), RODATA, $64
// MOD26
DATA ·constants<>+0(SB)/8, $0x3ffffff
DATA ·constants<>+8(SB)/8, $0x3ffffff
GLOBL ·constants<>(SB), RODATA, $0x30
// EX0
DATA ·constants<>+16(SB)/8, $0x0006050403020100
DATA ·constants<>+24(SB)/8, $0x1016151413121110
DATA ·constants<>+0x00(SB)/8, $0x0006050403020100
DATA ·constants<>+0x08(SB)/8, $0x1016151413121110
// EX1
DATA ·constants<>+32(SB)/8, $0x060c0b0a09080706
DATA ·constants<>+40(SB)/8, $0x161c1b1a19181716
DATA ·constants<>+0x10(SB)/8, $0x060c0b0a09080706
DATA ·constants<>+0x18(SB)/8, $0x161c1b1a19181716
// EX2
DATA ·constants<>+48(SB)/8, $0x0d0d0d0d0d0f0e0d
DATA ·constants<>+56(SB)/8, $0x1d1d1d1d1d1f1e1d
DATA ·constants<>+0x20(SB)/8, $0x0d0d0d0d0d0f0e0d
DATA ·constants<>+0x28(SB)/8, $0x1d1d1d1d1d1f1e1d
// h = (f*g) % (2**130-5) [partial reduction]
// MULTIPLY multiplies each lane of f and g, partially reduced
// modulo 2¹³⁰ - 5. The result, h, consists of partial products
// in each lane that need to be reduced further to produce the
// final result.
//
// h₁₃₀ = (f₁₃₀g₁₃₀) % 2¹³⁰ + (5f₁₃₀g₁₃₀) / 2¹³⁰
//
// Note that the multiplication by 5 of the high bits is
// achieved by precalculating the multiplication of four of the
// g coefficients by 5. These are g51-g54.
#define MULTIPLY(f0, f1, f2, f3, f4, g0, g1, g2, g3, g4, g51, g52, g53, g54, h0, h1, h2, h3, h4) \
VMLOF f0, g0, h0 \
VMLOF f0, g1, h1 \
VMLOF f0, g2, h2 \
VMLOF f0, g3, h3 \
VMLOF f0, g1, h1 \
VMLOF f0, g4, h4 \
VMLOF f0, g2, h2 \
VMLOF f1, g54, T_0 \
VMLOF f1, g0, T_1 \
VMLOF f1, g1, T_2 \
VMLOF f1, g2, T_3 \
VMLOF f1, g0, T_1 \
VMLOF f1, g3, T_4 \
VMLOF f1, g1, T_2 \
VMALOF f2, g53, h0, h0 \
VMALOF f2, g54, h1, h1 \
VMALOF f2, g0, h2, h2 \
VMALOF f2, g1, h3, h3 \
VMALOF f2, g54, h1, h1 \
VMALOF f2, g2, h4, h4 \
VMALOF f2, g0, h2, h2 \
VMALOF f3, g52, T_0, T_0 \
VMALOF f3, g53, T_1, T_1 \
VMALOF f3, g54, T_2, T_2 \
VMALOF f3, g0, T_3, T_3 \
VMALOF f3, g53, T_1, T_1 \
VMALOF f3, g1, T_4, T_4 \
VMALOF f3, g54, T_2, T_2 \
VMALOF f4, g51, h0, h0 \
VMALOF f4, g52, h1, h1 \
VMALOF f4, g53, h2, h2 \
VMALOF f4, g54, h3, h3 \
VMALOF f4, g52, h1, h1 \
VMALOF f4, g0, h4, h4 \
VMALOF f4, g53, h2, h2 \
VAG T_0, h0, h0 \
VAG T_1, h1, h1 \
VAG T_2, h2, h2 \
VAG T_3, h3, h3 \
VAG T_4, h4, h4
VAG T_1, h1, h1 \
VAG T_4, h4, h4 \
VAG T_2, h2, h2
// carry h0->h1 h3->h4, h1->h2 h4->h0, h0->h1 h2->h3, h3->h4
// REDUCE performs the following carry operations in four
// stages, as specified in Bernstein & Schwabe:
//
// 1: h₂₆[0]->h₂₆[1] h₂₆[3]->h₂₆[4]
// 2: h₂₆[1]->h₂₆[2] h₂₆[4]->h₂₆[0]
// 3: h₂₆[0]->h₂₆[1] h₂₆[2]->h₂₆[3]
// 4: h₂₆[3]->h₂₆[4]
//
// The result is that all of the limbs are limited to 26-bits
// except for h₂₆[1] and h₂₆[4] which are limited to 27-bits.
//
// Note that although each limb is aligned at 26-bit intervals
// they may contain values that exceed 2²⁶ - 1, hence the need
// to carry the excess bits in each limb.
#define REDUCE(h0, h1, h2, h3, h4) \
VESRLG $26, h0, T_0 \
VESRLG $26, h3, T_1 \
@@ -136,144 +208,155 @@ DATA ·constants<>+56(SB)/8, $0x1d1d1d1d1d1f1e1d
VN MOD26, h3, h3 \
VAG T_2, h4, h4
// expand in0 into d[0] and in1 into d[1]
// EXPAND splits the 128-bit little-endian values in0 and in1
// into 26-bit big-endian limbs and places the results into
// the first and second lane of d₂₆[0:4] respectively.
//
// The EX0, EX1 and EX2 constants are arrays of byte indices
// for permutation. The permutation both reverses the bytes
// in the input and ensures the bytes are copied into the
// destination limb ready to be shifted into their final
// position.
#define EXPAND(in0, in1, d0, d1, d2, d3, d4) \
VGBM $0x0707, d1 \ // d1=tmp
VPERM in0, in1, EX2, d4 \
VPERM in0, in1, EX0, d0 \
VPERM in0, in1, EX1, d2 \
VN d1, d4, d4 \
VPERM in0, in1, EX2, d4 \
VESRLG $26, d0, d1 \
VESRLG $30, d2, d3 \
VESRLG $4, d2, d2 \
VN MOD26, d0, d0 \
VN MOD26, d1, d1 \
VN MOD26, d2, d2 \
VN MOD26, d3, d3
VN MOD26, d0, d0 \ // [in0₂₆[0], in1₂₆[0]]
VN MOD26, d3, d3 \ // [in0₂₆[3], in1₂₆[3]]
VN MOD26, d1, d1 \ // [in0₂₆[1], in1₂₆[1]]
VN MOD24, d4, d4 \ // [in0₂₆[4], in1₂₆[4]]
VN MOD26, d2, d2 // [in0₂₆[2], in1₂₆[2]]
// pack h4:h0 into h1:h0 (no carry)
#define PACK(h0, h1, h2, h3, h4) \
VESLG $26, h1, h1 \
VESLG $26, h3, h3 \
VO h0, h1, h0 \
VO h2, h3, h2 \
VESLG $4, h2, h2 \
VLEIB $7, $48, h1 \
VSLB h1, h2, h2 \
VO h0, h2, h0 \
VLEIB $7, $104, h1 \
VSLB h1, h4, h3 \
VO h3, h0, h0 \
VLEIB $7, $24, h1 \
VSRLB h1, h4, h1
// func updateVX(state *macState, msg []byte)
TEXT ·updateVX(SB), NOSPLIT, $0
MOVD state+0(FP), R1
LMG msg+8(FP), R2, R3 // R2=msg_base, R3=msg_len
// if h > 2**130-5 then h -= 2**130-5
#define MOD(h0, h1, t0, t1, t2) \
VZERO t0 \
VLEIG $1, $5, t0 \
VACCQ h0, t0, t1 \
VAQ h0, t0, t0 \
VONE t2 \
VLEIG $1, $-4, t2 \
VAQ t2, t1, t1 \
VACCQ h1, t1, t1 \
VONE t2 \
VAQ t2, t1, t1 \
VN h0, t1, t2 \
VNC t0, t1, t1 \
VO t1, t2, h0
// func poly1305vx(out *[16]byte, m *byte, mlen uint64, key *[32]key)
TEXT ·poly1305vx(SB), $0-32
// This code processes up to 2 blocks (32 bytes) per iteration
// using the algorithm described in:
// NEON crypto, Daniel J. Bernstein & Peter Schwabe
// https://cryptojedi.org/papers/neoncrypto-20120320.pdf
LMG out+0(FP), R1, R4 // R1=out, R2=m, R3=mlen, R4=key
// load MOD26, EX0, EX1 and EX2
// load EX0, EX1 and EX2
MOVD $·constants<>(SB), R5
VLM (R5), MOD26, EX2
VLM (R5), EX0, EX2
// setup r
VL (R4), T_0
MOVD $·keyMask<>(SB), R6
VL (R6), T_1
VN T_0, T_1, T_0
EXPAND(T_0, T_0, R_0, R_1, R_2, R_3, R_4)
// generate masks
VGMG $(64-24), $63, MOD24 // [0x00ffffff, 0x00ffffff]
VGMG $(64-26), $63, MOD26 // [0x03ffffff, 0x03ffffff]
// setup r*5
VLEIG $0, $5, T_0
VLEIG $1, $5, T_0
// load h (accumulator) and r (key) from state
VZERO T_1 // [0, 0]
VL 0(R1), T_0 // [h₆₄[0], h₆₄[1]]
VLEG $0, 16(R1), T_1 // [h₆₄[2], 0]
VL 24(R1), T_2 // [r₆₄[0], r₆₄[1]]
VPDI $0, T_0, T_2, T_3 // [h₆₄[0], r₆₄[0]]
VPDI $5, T_0, T_2, T_4 // [h₆₄[1], r₆₄[1]]
// store r (for final block)
VMLOF T_0, R_1, R5SAVE_1
VMLOF T_0, R_2, R5SAVE_2
VMLOF T_0, R_3, R5SAVE_3
VMLOF T_0, R_4, R5SAVE_4
VLGVG $0, R_0, RSAVE_0
VLGVG $0, R_1, RSAVE_1
VLGVG $0, R_2, RSAVE_2
VLGVG $0, R_3, RSAVE_3
VLGVG $0, R_4, RSAVE_4
// unpack h and r into 26-bit limbs
// note: h₆₄[2] may have the low 3 bits set, so h₂₆[4] is a 27-bit value
VN MOD26, T_3, H_0 // [h₂₆[0], r₂₆[0]]
VZERO H_1 // [0, 0]
VZERO H_3 // [0, 0]
VGMG $(64-12-14), $(63-12), T_0 // [0x03fff000, 0x03fff000] - 26-bit mask with low 12 bits masked out
VESLG $24, T_1, T_1 // [h₆₄[2]<<24, 0]
VERIMG $-26&63, T_3, MOD26, H_1 // [h₂₆[1], r₂₆[1]]
VESRLG $+52&63, T_3, H_2 // [h₂₆[2], r₂₆[2]] - low 12 bits only
VERIMG $-14&63, T_4, MOD26, H_3 // [h₂₆[1], r₂₆[1]]
VESRLG $40, T_4, H_4 // [h₂₆[4], r₂₆[4]] - low 24 bits only
VERIMG $+12&63, T_4, T_0, H_2 // [h₂₆[2], r₂₆[2]] - complete
VO T_1, H_4, H_4 // [h₂₆[4], r₂₆[4]] - complete
// skip r**2 calculation
// replicate r across all 4 vector elements
VREPF $3, H_0, R_0 // [r₂₆[0], r₂₆[0], r₂₆[0], r₂₆[0]]
VREPF $3, H_1, R_1 // [r₂₆[1], r₂₆[1], r₂₆[1], r₂₆[1]]
VREPF $3, H_2, R_2 // [r₂₆[2], r₂₆[2], r₂₆[2], r₂₆[2]]
VREPF $3, H_3, R_3 // [r₂₆[3], r₂₆[3], r₂₆[3], r₂₆[3]]
VREPF $3, H_4, R_4 // [r₂₆[4], r₂₆[4], r₂₆[4], r₂₆[4]]
// zero out lane 1 of h
VLEIG $1, $0, H_0 // [h₂₆[0], 0]
VLEIG $1, $0, H_1 // [h₂₆[1], 0]
VLEIG $1, $0, H_2 // [h₂₆[2], 0]
VLEIG $1, $0, H_3 // [h₂₆[3], 0]
VLEIG $1, $0, H_4 // [h₂₆[4], 0]
// calculate 5r (ignore least significant limb)
VREPIF $5, T_0
VMLF T_0, R_1, R5_1 // [5r₂₆[1], 5r₂₆[1], 5r₂₆[1], 5r₂₆[1]]
VMLF T_0, R_2, R5_2 // [5r₂₆[2], 5r₂₆[2], 5r₂₆[2], 5r₂₆[2]]
VMLF T_0, R_3, R5_3 // [5r₂₆[3], 5r₂₆[3], 5r₂₆[3], 5r₂₆[3]]
VMLF T_0, R_4, R5_4 // [5r₂₆[4], 5r₂₆[4], 5r₂₆[4], 5r₂₆[4]]
// skip r² calculation if we are only calculating one block
CMPBLE R3, $16, skip
// calculate r**2
MULTIPLY(R_0, R_1, R_2, R_3, R_4, R_0, R_1, R_2, R_3, R_4, R5SAVE_1, R5SAVE_2, R5SAVE_3, R5SAVE_4, H_0, H_1, H_2, H_3, H_4)
REDUCE(H_0, H_1, H_2, H_3, H_4)
VLEIG $0, $5, T_0
VLEIG $1, $5, T_0
VMLOF T_0, H_1, R5_1
VMLOF T_0, H_2, R5_2
VMLOF T_0, H_3, R5_3
VMLOF T_0, H_4, R5_4
VLR H_0, R_0
VLR H_1, R_1
VLR H_2, R_2
VLR H_3, R_3
VLR H_4, R_4
// calculate r²
MULTIPLY(R_0, R_1, R_2, R_3, R_4, R_0, R_1, R_2, R_3, R_4, R5_1, R5_2, R5_3, R5_4, M_0, M_1, M_2, M_3, M_4)
REDUCE(M_0, M_1, M_2, M_3, M_4)
VGBM $0x0f0f, T_0
VERIMG $0, M_0, T_0, R_0 // [r₂₆[0], r²₂₆[0], r₂₆[0], r²₂₆[0]]
VERIMG $0, M_1, T_0, R_1 // [r₂₆[1], r²₂₆[1], r₂₆[1], r²₂₆[1]]
VERIMG $0, M_2, T_0, R_2 // [r₂₆[2], r²₂₆[2], r₂₆[2], r²₂₆[2]]
VERIMG $0, M_3, T_0, R_3 // [r₂₆[3], r²₂₆[3], r₂₆[3], r²₂₆[3]]
VERIMG $0, M_4, T_0, R_4 // [r₂₆[4], r²₂₆[4], r₂₆[4], r²₂₆[4]]
// initialize h
VZERO H_0
VZERO H_1
VZERO H_2
VZERO H_3
VZERO H_4
// calculate 5r² (ignore least significant limb)
VREPIF $5, T_0
VMLF T_0, R_1, R5_1 // [5r₂₆[1], 5r²₂₆[1], 5r₂₆[1], 5r²₂₆[1]]
VMLF T_0, R_2, R5_2 // [5r₂₆[2], 5r²₂₆[2], 5r₂₆[2], 5r²₂₆[2]]
VMLF T_0, R_3, R5_3 // [5r₂₆[3], 5r²₂₆[3], 5r₂₆[3], 5r²₂₆[3]]
VMLF T_0, R_4, R5_4 // [5r₂₆[4], 5r²₂₆[4], 5r₂₆[4], 5r²₂₆[4]]
loop:
CMPBLE R3, $32, b2
VLM (R2), T_0, T_1
SUB $32, R3
MOVD $32(R2), R2
EXPAND(T_0, T_1, F_0, F_1, F_2, F_3, F_4)
VLEIB $4, $1, F_4
VLEIB $12, $1, F_4
CMPBLE R3, $32, b2 // 2 or fewer blocks remaining, need to change key coefficients
// load next 2 blocks from message
VLM (R2), T_0, T_1
// update message slice
SUB $32, R3
MOVD $32(R2), R2
// unpack message blocks into 26-bit big-endian limbs
EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4)
// add 2¹²⁸ to each message block value
VLEIB $4, $1, M_4
VLEIB $12, $1, M_4
multiply:
VAG H_0, F_0, F_0
VAG H_1, F_1, F_1
VAG H_2, F_2, F_2
VAG H_3, F_3, F_3
VAG H_4, F_4, F_4
MULTIPLY(F_0, F_1, F_2, F_3, F_4, R_0, R_1, R_2, R_3, R_4, R5_1, R5_2, R5_3, R5_4, H_0, H_1, H_2, H_3, H_4)
// accumulate the incoming message
VAG H_0, M_0, M_0
VAG H_3, M_3, M_3
VAG H_1, M_1, M_1
VAG H_4, M_4, M_4
VAG H_2, M_2, M_2
// multiply the accumulator by the key coefficient
MULTIPLY(M_0, M_1, M_2, M_3, M_4, R_0, R_1, R_2, R_3, R_4, R5_1, R5_2, R5_3, R5_4, H_0, H_1, H_2, H_3, H_4)
// carry and partially reduce the partial products
REDUCE(H_0, H_1, H_2, H_3, H_4)
CMPBNE R3, $0, loop
finish:
// sum vectors
// sum lane 0 and lane 1 and put the result in lane 1
VZERO T_0
VSUMQG H_0, T_0, H_0
VSUMQG H_1, T_0, H_1
VSUMQG H_2, T_0, H_2
VSUMQG H_3, T_0, H_3
VSUMQG H_1, T_0, H_1
VSUMQG H_4, T_0, H_4
VSUMQG H_2, T_0, H_2
// h may be >= 2*(2**130-5) so we need to reduce it again
// reduce again after summation
// TODO(mundaym): there might be a more efficient way to do this
// now that we only have 1 active lane. For example, we could
// simultaneously pack the values as we reduce them.
REDUCE(H_0, H_1, H_2, H_3, H_4)
// carry h1->h4
// carry h[1] through to h[4] so that only h[4] can exceed 2²⁶ - 1
// TODO(mundaym): in testing this final carry was unnecessary.
// Needs a proof before it can be removed though.
VESRLG $26, H_1, T_1
VN MOD26, H_1, H_1
VAQ T_1, H_2, H_2
@@ -284,95 +367,137 @@ finish:
VN MOD26, H_3, H_3
VAQ T_3, H_4, H_4
// h is now < 2*(2**130-5)
// pack h into h1 (hi) and h0 (lo)
PACK(H_0, H_1, H_2, H_3, H_4)
// if h > 2**130-5 then h -= 2**130-5
MOD(H_0, H_1, T_0, T_1, T_2)
// h += s
MOVD $·bswapMask<>(SB), R5
VL (R5), T_1
VL 16(R4), T_0
VPERM T_0, T_0, T_1, T_0 // reverse bytes (to big)
VAQ T_0, H_0, H_0
VPERM H_0, H_0, T_1, H_0 // reverse bytes (to little)
VST H_0, (R1)
// h is now < 2(2¹³⁰ - 5)
// Pack each lane in h₂₆[0:4] into h₁₂₈[0:1].
VESLG $26, H_1, H_1
VESLG $26, H_3, H_3
VO H_0, H_1, H_0
VO H_2, H_3, H_2
VESLG $4, H_2, H_2
VLEIB $7, $48, H_1
VSLB H_1, H_2, H_2
VO H_0, H_2, H_0
VLEIB $7, $104, H_1
VSLB H_1, H_4, H_3
VO H_3, H_0, H_0
VLEIB $7, $24, H_1
VSRLB H_1, H_4, H_1
// update state
VSTEG $1, H_0, 0(R1)
VSTEG $0, H_0, 8(R1)
VSTEG $1, H_1, 16(R1)
RET
b2:
b2: // 2 or fewer blocks remaining
CMPBLE R3, $16, b1
// 2 blocks remaining
SUB $17, R3
VL (R2), T_0
VLL R3, 16(R2), T_1
ADD $1, R3
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, T_1
EXPAND(T_0, T_1, F_0, F_1, F_2, F_3, F_4)
CMPBNE R3, $16, 2(PC)
VLEIB $12, $1, F_4
VLEIB $4, $1, F_4
// Load the 2 remaining blocks (17-32 bytes remaining).
MOVD $-17(R3), R0 // index of final byte to load modulo 16
VL (R2), T_0 // load full 16 byte block
VLL R0, 16(R2), T_1 // load final (possibly partial) block and pad with zeros to 16 bytes
// setup [r²,r]
VLVGG $1, RSAVE_0, R_0
VLVGG $1, RSAVE_1, R_1
VLVGG $1, RSAVE_2, R_2
VLVGG $1, RSAVE_3, R_3
VLVGG $1, RSAVE_4, R_4
VPDI $0, R5_1, R5SAVE_1, R5_1
VPDI $0, R5_2, R5SAVE_2, R5_2
VPDI $0, R5_3, R5SAVE_3, R5_3
VPDI $0, R5_4, R5SAVE_4, R5_4
// The Poly1305 algorithm requires that a 1 bit be appended to
// each message block. If the final block is less than 16 bytes
// long then it is easiest to insert the 1 before the message
// block is split into 26-bit limbs. If, on the other hand, the
// final message block is 16 bytes long then we append the 1 bit
// after expansion as normal.
MOVBZ $1, R0
MOVD $-16(R3), R3 // index of byte in last block to insert 1 at (could be 16)
CMPBEQ R3, $16, 2(PC) // skip the insertion if the final block is 16 bytes long
VLVGB R3, R0, T_1 // insert 1 into the byte at index R3
// Split both blocks into 26-bit limbs in the appropriate lanes.
EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4)
// Append a 1 byte to the end of the second to last block.
VLEIB $4, $1, M_4
// Append a 1 byte to the end of the last block only if it is a
// full 16 byte block.
CMPBNE R3, $16, 2(PC)
VLEIB $12, $1, M_4
// Finally, set up the coefficients for the final multiplication.
// We have previously saved r and 5r in the 32-bit even indexes
// of the R_[0-4] and R5_[1-4] coefficient registers.
//
// We want lane 0 to be multiplied by r² so that can be kept the
// same. We want lane 1 to be multiplied by r so we need to move
// the saved r value into the 32-bit odd index in lane 1 by
// rotating the 64-bit lane by 32.
VGBM $0x00ff, T_0 // [0, 0xffffffffffffffff] - mask lane 1 only
VERIMG $32, R_0, T_0, R_0 // [_, r²₂₆[0], _, r₂₆[0]]
VERIMG $32, R_1, T_0, R_1 // [_, r²₂₆[1], _, r₂₆[1]]
VERIMG $32, R_2, T_0, R_2 // [_, r²₂₆[2], _, r₂₆[2]]
VERIMG $32, R_3, T_0, R_3 // [_, r²₂₆[3], _, r₂₆[3]]
VERIMG $32, R_4, T_0, R_4 // [_, r²₂₆[4], _, r₂₆[4]]
VERIMG $32, R5_1, T_0, R5_1 // [_, 5r²₂₆[1], _, 5r₂₆[1]]
VERIMG $32, R5_2, T_0, R5_2 // [_, 5r²₂₆[2], _, 5r₂₆[2]]
VERIMG $32, R5_3, T_0, R5_3 // [_, 5r²₂₆[3], _, 5r₂₆[3]]
VERIMG $32, R5_4, T_0, R5_4 // [_, 5r²₂₆[4], _, 5r₂₆[4]]
MOVD $0, R3
BR multiply
skip:
VZERO H_0
VZERO H_1
VZERO H_2
VZERO H_3
VZERO H_4
CMPBEQ R3, $0, finish
b1:
// 1 block remaining
SUB $1, R3
VLL R3, (R2), T_0
ADD $1, R3
b1: // 1 block remaining
// Load the final block (1-16 bytes). This will be placed into
// lane 0.
MOVD $-1(R3), R0
VLL R0, (R2), T_0 // pad to 16 bytes with zeros
// The Poly1305 algorithm requires that a 1 bit be appended to
// each message block. If the final block is less than 16 bytes
// long then it is easiest to insert the 1 before the message
// block is split into 26-bit limbs. If, on the other hand, the
// final message block is 16 bytes long then we append the 1 bit
// after expansion as normal.
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, T_0
VZERO T_1
EXPAND(T_0, T_1, F_0, F_1, F_2, F_3, F_4)
CMPBNE R3, $16, 2(PC)
VLEIB $4, $1, F_4
VLEIG $1, $1, R_0
VZERO R_1
VZERO R_2
VZERO R_3
VZERO R_4
VZERO R5_1
VZERO R5_2
VZERO R5_3
VZERO R5_4
// setup [r, 1]
VLVGG $0, RSAVE_0, R_0
VLVGG $0, RSAVE_1, R_1
VLVGG $0, RSAVE_2, R_2
VLVGG $0, RSAVE_3, R_3
VLVGG $0, RSAVE_4, R_4
VPDI $0, R5SAVE_1, R5_1, R5_1
VPDI $0, R5SAVE_2, R5_2, R5_2
VPDI $0, R5SAVE_3, R5_3, R5_3
VPDI $0, R5SAVE_4, R5_4, R5_4
// Set the message block in lane 1 to the value 0 so that it
// can be accumulated without affecting the final result.
VZERO T_1
// Split the final message block into 26-bit limbs in lane 0.
// Lane 1 will be contain 0.
EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4)
// Append a 1 byte to the end of the last block only if it is a
// full 16 byte block.
CMPBNE R3, $16, 2(PC)
VLEIB $4, $1, M_4
// We have previously saved r and 5r in the 32-bit even indexes
// of the R_[0-4] and R5_[1-4] coefficient registers.
//
// We want lane 0 to be multiplied by r so we need to move the
// saved r value into the 32-bit odd index in lane 0. We want
// lane 1 to be set to the value 1. This makes multiplication
// a no-op. We do this by setting lane 1 in every register to 0
// and then just setting the 32-bit index 3 in R_0 to 1.
VZERO T_0
MOVD $0, R0
MOVD $0x10111213, R12
VLVGP R12, R0, T_1 // [_, 0x10111213, _, 0x00000000]
VPERM T_0, R_0, T_1, R_0 // [_, r₂₆[0], _, 0]
VPERM T_0, R_1, T_1, R_1 // [_, r₂₆[1], _, 0]
VPERM T_0, R_2, T_1, R_2 // [_, r₂₆[2], _, 0]
VPERM T_0, R_3, T_1, R_3 // [_, r₂₆[3], _, 0]
VPERM T_0, R_4, T_1, R_4 // [_, r₂₆[4], _, 0]
VPERM T_0, R5_1, T_1, R5_1 // [_, 5r₂₆[1], _, 0]
VPERM T_0, R5_2, T_1, R5_2 // [_, 5r₂₆[2], _, 0]
VPERM T_0, R5_3, T_1, R5_3 // [_, 5r₂₆[3], _, 0]
VPERM T_0, R5_4, T_1, R5_4 // [_, 5r₂₆[4], _, 0]
// Set the value of lane 1 to be 1.
VLEIF $3, $1, R_0 // [_, r₂₆[0], _, 1]
MOVD $0, R3
BR multiply

3
vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go generated vendored
View File

@@ -6,10 +6,9 @@
package salsa
// This function is implemented in salsa2020_amd64.s.
//go:noescape
// salsa2020XORKeyStream is implemented in salsa20_amd64.s.
func salsa2020XORKeyStream(out, in *byte, n uint64, nonce, key *byte)
// XORKeyStream crypts bytes from in to out using the given key and counters.

8
vendor/golang.org/x/crypto/salsa20/salsa/salsa2020_amd64.s → vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.s generated vendored
View File

@@ -99,30 +99,24 @@ TEXT ·salsa2020XORKeyStream(SB),0,$456-40 // frame = 424 + 32 byte alignment
MOVL 36 (SP),CX
MOVL DX,288(SP)
MOVL CX,304(SP)
ADDQ $1,DX
SHLQ $32,CX
ADDQ CX,DX
ADDQ $1,DX
MOVQ DX,CX
SHRQ $32,CX
MOVL DX, 292 (SP)
MOVL CX, 308 (SP)
ADDQ $1,DX
SHLQ $32,CX
ADDQ CX,DX
MOVQ DX,CX
SHRQ $32,CX
MOVL DX, 296 (SP)
MOVL CX, 312 (SP)
ADDQ $1,DX
SHLQ $32,CX
ADDQ CX,DX
MOVQ DX,CX
SHRQ $32,CX
MOVL DX, 300 (SP)
MOVL CX, 316 (SP)
ADDQ $1,DX
SHLQ $32,CX
ADDQ CX,DX
MOVQ DX,CX
SHRQ $32,CX
MOVL DX,16(SP)

14
vendor/golang.org/x/crypto/salsa20/salsa/salsa20_noasm.go generated vendored Normal file
View File

@@ -0,0 +1,14 @@
// Copyright 2019 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 appengine gccgo
package salsa
// XORKeyStream crypts bytes from in to out using the given key and counters.
// In and out must overlap entirely or not at all. Counter
// contains the raw salsa20 counter bytes (both nonce and block counter).
func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
genericXORKeyStream(out, in, counter, key)
}

9
vendor/golang.org/x/crypto/salsa20/salsa/salsa20_ref.go generated vendored
View File

@@ -2,8 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !amd64 appengine gccgo
package salsa
const rounds = 20
@@ -202,10 +200,9 @@ func core(out *[64]byte, in *[16]byte, k *[32]byte, c *[16]byte) {
out[63] = byte(x15 >> 24)
}
// XORKeyStream crypts bytes from in to out using the given key and counters.
// In and out must overlap entirely or not at all. Counter
// contains the raw salsa20 counter bytes (both nonce and block counter).
func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
// genericXORKeyStream is the generic implementation of XORKeyStream to be used
// when no assembly implementation is available.
func genericXORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
var block [64]byte
var counterCopy [16]byte
copy(counterCopy[:], counter[:])

28
vendor/golang.org/x/crypto/ssh/agent/client.go generated vendored
View File

@@ -102,8 +102,9 @@ type ConstraintExtension struct {
// AddedKey describes an SSH key to be added to an Agent.
type AddedKey struct {
// PrivateKey must be a *rsa.PrivateKey, *dsa.PrivateKey or
// *ecdsa.PrivateKey, which will be inserted into the agent.
// PrivateKey must be a *rsa.PrivateKey, *dsa.PrivateKey,
// ed25519.PrivateKey or *ecdsa.PrivateKey, which will be inserted into the
// agent.
PrivateKey interface{}
// Certificate, if not nil, is communicated to the agent and will be
// stored with the key.
@@ -566,6 +567,17 @@ func (c *client) insertKey(s interface{}, comment string, constraints []byte) er
Comments: comment,
Constraints: constraints,
})
case ed25519.PrivateKey:
req = ssh.Marshal(ed25519KeyMsg{
Type: ssh.KeyAlgoED25519,
Pub: []byte(k)[32:],
Priv: []byte(k),
Comments: comment,
Constraints: constraints,
})
// This function originally supported only *ed25519.PrivateKey, however the
// general idiom is to pass ed25519.PrivateKey by value, not by pointer.
// We still support the pointer variant for backwards compatibility.
case *ed25519.PrivateKey:
req = ssh.Marshal(ed25519KeyMsg{
Type: ssh.KeyAlgoED25519,
@@ -683,6 +695,18 @@ func (c *client) insertCert(s interface{}, cert *ssh.Certificate, comment string
Comments: comment,
Constraints: constraints,
})
case ed25519.PrivateKey:
req = ssh.Marshal(ed25519CertMsg{
Type: cert.Type(),
CertBytes: cert.Marshal(),
Pub: []byte(k)[32:],
Priv: []byte(k),
Comments: comment,
Constraints: constraints,
})
// This function originally supported only *ed25519.PrivateKey, however the
// general idiom is to pass ed25519.PrivateKey by value, not by pointer.
// We still support the pointer variant for backwards compatibility.
case *ed25519.PrivateKey:
req = ssh.Marshal(ed25519CertMsg{
Type: cert.Type(),

39
vendor/golang.org/x/crypto/ssh/certs.go generated vendored
View File

@@ -17,12 +17,14 @@ import (
// These constants from [PROTOCOL.certkeys] represent the algorithm names
// for certificate types supported by this package.
const (
CertAlgoRSAv01 = "ssh-rsa-cert-v01@openssh.com"
CertAlgoDSAv01 = "ssh-dss-cert-v01@openssh.com"
CertAlgoECDSA256v01 = "ecdsa-sha2-nistp256-cert-v01@openssh.com"
CertAlgoECDSA384v01 = "ecdsa-sha2-nistp384-cert-v01@openssh.com"
CertAlgoECDSA521v01 = "ecdsa-sha2-nistp521-cert-v01@openssh.com"
CertAlgoED25519v01 = "ssh-ed25519-cert-v01@openssh.com"
CertAlgoRSAv01 = "ssh-rsa-cert-v01@openssh.com"
CertAlgoDSAv01 = "ssh-dss-cert-v01@openssh.com"
CertAlgoECDSA256v01 = "ecdsa-sha2-nistp256-cert-v01@openssh.com"
CertAlgoECDSA384v01 = "ecdsa-sha2-nistp384-cert-v01@openssh.com"
CertAlgoECDSA521v01 = "ecdsa-sha2-nistp521-cert-v01@openssh.com"
CertAlgoSKECDSA256v01 = "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com"
CertAlgoED25519v01 = "ssh-ed25519-cert-v01@openssh.com"
CertAlgoSKED25519v01 = "sk-ssh-ed25519-cert-v01@openssh.com"
)
// Certificate types distinguish between host and user
@@ -37,6 +39,7 @@ const (
type Signature struct {
Format string
Blob []byte
Rest []byte `ssh:"rest"`
}
// CertTimeInfinity can be used for OpenSSHCertV01.ValidBefore to indicate that
@@ -411,8 +414,8 @@ func (c *CertChecker) CheckCert(principal string, cert *Certificate) error {
return nil
}
// SignCert sets c.SignatureKey to the authority's public key and stores a
// Signature, by authority, in the certificate.
// SignCert signs the certificate with an authority, setting the Nonce,
// SignatureKey, and Signature fields.
func (c *Certificate) SignCert(rand io.Reader, authority Signer) error {
c.Nonce = make([]byte, 32)
if _, err := io.ReadFull(rand, c.Nonce); err != nil {
@@ -429,12 +432,14 @@ func (c *Certificate) SignCert(rand io.Reader, authority Signer) error {
}
var certAlgoNames = map[string]string{
KeyAlgoRSA: CertAlgoRSAv01,
KeyAlgoDSA: CertAlgoDSAv01,
KeyAlgoECDSA256: CertAlgoECDSA256v01,
KeyAlgoECDSA384: CertAlgoECDSA384v01,
KeyAlgoECDSA521: CertAlgoECDSA521v01,
KeyAlgoED25519: CertAlgoED25519v01,
KeyAlgoRSA: CertAlgoRSAv01,
KeyAlgoDSA: CertAlgoDSAv01,
KeyAlgoECDSA256: CertAlgoECDSA256v01,
KeyAlgoECDSA384: CertAlgoECDSA384v01,
KeyAlgoECDSA521: CertAlgoECDSA521v01,
KeyAlgoSKECDSA256: CertAlgoSKECDSA256v01,
KeyAlgoED25519: CertAlgoED25519v01,
KeyAlgoSKED25519: CertAlgoSKED25519v01,
}
// certToPrivAlgo returns the underlying algorithm for a certificate algorithm.
@@ -518,6 +523,12 @@ func parseSignatureBody(in []byte) (out *Signature, rest []byte, ok bool) {
return
}
switch out.Format {
case KeyAlgoSKECDSA256, CertAlgoSKECDSA256v01, KeyAlgoSKED25519, CertAlgoSKED25519v01:
out.Rest = in
return out, nil, ok
}
return out, in, ok
}

77
vendor/golang.org/x/crypto/ssh/cipher.go generated vendored
View File

@@ -16,9 +16,8 @@ import (
"hash"
"io"
"io/ioutil"
"math/bits"
"golang.org/x/crypto/internal/chacha20"
"golang.org/x/crypto/chacha20"
"golang.org/x/crypto/poly1305"
)
@@ -120,7 +119,7 @@ var cipherModes = map[string]*cipherMode{
chacha20Poly1305ID: {64, 0, newChaCha20Cipher},
// CBC mode is insecure and so is not included in the default config.
// (See http://www.isg.rhul.ac.uk/~kp/SandPfinal.pdf). If absolutely
// (See https://www.ieee-security.org/TC/SP2013/papers/4977a526.pdf). If absolutely
// needed, it's possible to specify a custom Config to enable it.
// You should expect that an active attacker can recover plaintext if
// you do.
@@ -149,8 +148,8 @@ type streamPacketCipher struct {
macResult []byte
}
// readPacket reads and decrypt a single packet from the reader argument.
func (s *streamPacketCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
// readCipherPacket reads and decrypt a single packet from the reader argument.
func (s *streamPacketCipher) readCipherPacket(seqNum uint32, r io.Reader) ([]byte, error) {
if _, err := io.ReadFull(r, s.prefix[:]); err != nil {
return nil, err
}
@@ -221,8 +220,8 @@ func (s *streamPacketCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, err
return s.packetData[:length-paddingLength-1], nil
}
// writePacket encrypts and sends a packet of data to the writer argument
func (s *streamPacketCipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
// writeCipherPacket encrypts and sends a packet of data to the writer argument
func (s *streamPacketCipher) writeCipherPacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
if len(packet) > maxPacket {
return errors.New("ssh: packet too large")
}
@@ -327,7 +326,7 @@ func newGCMCipher(key, iv, unusedMacKey []byte, unusedAlgs directionAlgorithms)
const gcmTagSize = 16
func (c *gcmCipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
func (c *gcmCipher) writeCipherPacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
// Pad out to multiple of 16 bytes. This is different from the
// stream cipher because that encrypts the length too.
padding := byte(packetSizeMultiple - (1+len(packet))%packetSizeMultiple)
@@ -370,7 +369,7 @@ func (c *gcmCipher) incIV() {
}
}
func (c *gcmCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
func (c *gcmCipher) readCipherPacket(seqNum uint32, r io.Reader) ([]byte, error) {
if _, err := io.ReadFull(r, c.prefix[:]); err != nil {
return nil, err
}
@@ -486,8 +485,8 @@ type cbcError string
func (e cbcError) Error() string { return string(e) }
func (c *cbcCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
p, err := c.readPacketLeaky(seqNum, r)
func (c *cbcCipher) readCipherPacket(seqNum uint32, r io.Reader) ([]byte, error) {
p, err := c.readCipherPacketLeaky(seqNum, r)
if err != nil {
if _, ok := err.(cbcError); ok {
// Verification error: read a fixed amount of
@@ -500,7 +499,7 @@ func (c *cbcCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
return p, err
}
func (c *cbcCipher) readPacketLeaky(seqNum uint32, r io.Reader) ([]byte, error) {
func (c *cbcCipher) readCipherPacketLeaky(seqNum uint32, r io.Reader) ([]byte, error) {
blockSize := c.decrypter.BlockSize()
// Read the header, which will include some of the subsequent data in the
@@ -576,7 +575,7 @@ func (c *cbcCipher) readPacketLeaky(seqNum uint32, r io.Reader) ([]byte, error)
return c.packetData[prefixLen:paddingStart], nil
}
func (c *cbcCipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
func (c *cbcCipher) writeCipherPacket(seqNum uint32, w io.Writer, rand io.Reader, packet []byte) error {
effectiveBlockSize := maxUInt32(cbcMinPacketSizeMultiple, c.encrypter.BlockSize())
// Length of encrypted portion of the packet (header, payload, padding).
@@ -642,8 +641,8 @@ const chacha20Poly1305ID = "chacha20-poly1305@openssh.com"
// the methods here also implement padding, which RFC4253 Section 6
// also requires of stream ciphers.
type chacha20Poly1305Cipher struct {
lengthKey [8]uint32
contentKey [8]uint32
lengthKey [32]byte
contentKey [32]byte
buf []byte
}
@@ -656,21 +655,21 @@ func newChaCha20Cipher(key, unusedIV, unusedMACKey []byte, unusedAlgs directionA
buf: make([]byte, 256),
}
for i := range c.contentKey {
c.contentKey[i] = binary.LittleEndian.Uint32(key[i*4 : (i+1)*4])
}
for i := range c.lengthKey {
c.lengthKey[i] = binary.LittleEndian.Uint32(key[(i+8)*4 : (i+9)*4])
}
copy(c.contentKey[:], key[:32])
copy(c.lengthKey[:], key[32:])
return c, nil
}
func (c *chacha20Poly1305Cipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
nonce := [3]uint32{0, 0, bits.ReverseBytes32(seqNum)}
s := chacha20.New(c.contentKey, nonce)
var polyKey [32]byte
func (c *chacha20Poly1305Cipher) readCipherPacket(seqNum uint32, r io.Reader) ([]byte, error) {
nonce := make([]byte, 12)
binary.BigEndian.PutUint32(nonce[8:], seqNum)
s, err := chacha20.NewUnauthenticatedCipher(c.contentKey[:], nonce)
if err != nil {
return nil, err
}
var polyKey, discardBuf [32]byte
s.XORKeyStream(polyKey[:], polyKey[:])
s.Advance() // skip next 32 bytes
s.XORKeyStream(discardBuf[:], discardBuf[:]) // skip the next 32 bytes
encryptedLength := c.buf[:4]
if _, err := io.ReadFull(r, encryptedLength); err != nil {
@@ -678,7 +677,11 @@ func (c *chacha20Poly1305Cipher) readPacket(seqNum uint32, r io.Reader) ([]byte,
}
var lenBytes [4]byte
chacha20.New(c.lengthKey, nonce).XORKeyStream(lenBytes[:], encryptedLength)
ls, err := chacha20.NewUnauthenticatedCipher(c.lengthKey[:], nonce)
if err != nil {
return nil, err
}
ls.XORKeyStream(lenBytes[:], encryptedLength)
length := binary.BigEndian.Uint32(lenBytes[:])
if length > maxPacket {
@@ -723,12 +726,16 @@ func (c *chacha20Poly1305Cipher) readPacket(seqNum uint32, r io.Reader) ([]byte,
return plain, nil
}
func (c *chacha20Poly1305Cipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, payload []byte) error {
nonce := [3]uint32{0, 0, bits.ReverseBytes32(seqNum)}
s := chacha20.New(c.contentKey, nonce)
var polyKey [32]byte
func (c *chacha20Poly1305Cipher) writeCipherPacket(seqNum uint32, w io.Writer, rand io.Reader, payload []byte) error {
nonce := make([]byte, 12)
binary.BigEndian.PutUint32(nonce[8:], seqNum)
s, err := chacha20.NewUnauthenticatedCipher(c.contentKey[:], nonce)
if err != nil {
return err
}
var polyKey, discardBuf [32]byte
s.XORKeyStream(polyKey[:], polyKey[:])
s.Advance() // skip next 32 bytes
s.XORKeyStream(discardBuf[:], discardBuf[:]) // skip the next 32 bytes
// There is no blocksize, so fall back to multiple of 8 byte
// padding, as described in RFC 4253, Sec 6.
@@ -748,7 +755,11 @@ func (c *chacha20Poly1305Cipher) writePacket(seqNum uint32, w io.Writer, rand io
}
binary.BigEndian.PutUint32(c.buf, uint32(1+len(payload)+padding))
chacha20.New(c.lengthKey, nonce).XORKeyStream(c.buf, c.buf[:4])
ls, err := chacha20.NewUnauthenticatedCipher(c.lengthKey[:], nonce)
if err != nil {
return err
}
ls.XORKeyStream(c.buf, c.buf[:4])
c.buf[4] = byte(padding)
copy(c.buf[5:], payload)
packetEnd := 5 + len(payload) + padding

136
vendor/golang.org/x/crypto/ssh/client_auth.go generated vendored
View File

@@ -36,7 +36,7 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
// during the authentication phase the client first attempts the "none" method
// then any untried methods suggested by the server.
tried := make(map[string]bool)
var tried []string
var lastMethods []string
sessionID := c.transport.getSessionID()
@@ -49,7 +49,9 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
// success
return nil
} else if ok == authFailure {
tried[auth.method()] = true
if m := auth.method(); !contains(tried, m) {
tried = append(tried, m)
}
}
if methods == nil {
methods = lastMethods
@@ -61,7 +63,7 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
findNext:
for _, a := range config.Auth {
candidateMethod := a.method()
if tried[candidateMethod] {
if contains(tried, candidateMethod) {
continue
}
for _, meth := range methods {
@@ -72,16 +74,16 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
}
}
}
return fmt.Errorf("ssh: unable to authenticate, attempted methods %v, no supported methods remain", keys(tried))
return fmt.Errorf("ssh: unable to authenticate, attempted methods %v, no supported methods remain", tried)
}
func keys(m map[string]bool) []string {
s := make([]string, 0, len(m))
for key := range m {
s = append(s, key)
func contains(list []string, e string) bool {
for _, s := range list {
if s == e {
return true
}
}
return s
return false
}
// An AuthMethod represents an instance of an RFC 4252 authentication method.
@@ -523,3 +525,117 @@ func (r *retryableAuthMethod) method() string {
func RetryableAuthMethod(auth AuthMethod, maxTries int) AuthMethod {
return &retryableAuthMethod{authMethod: auth, maxTries: maxTries}
}
// GSSAPIWithMICAuthMethod is an AuthMethod with "gssapi-with-mic" authentication.
// See RFC 4462 section 3
// gssAPIClient is implementation of the GSSAPIClient interface, see the definition of the interface for details.
// target is the server host you want to log in to.
func GSSAPIWithMICAuthMethod(gssAPIClient GSSAPIClient, target string) AuthMethod {
if gssAPIClient == nil {
panic("gss-api client must be not nil with enable gssapi-with-mic")
}
return &gssAPIWithMICCallback{gssAPIClient: gssAPIClient, target: target}
}
type gssAPIWithMICCallback struct {
gssAPIClient GSSAPIClient
target string
}
func (g *gssAPIWithMICCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (authResult, []string, error) {
m := &userAuthRequestMsg{
User: user,
Service: serviceSSH,
Method: g.method(),
}
// The GSS-API authentication method is initiated when the client sends an SSH_MSG_USERAUTH_REQUEST.
// See RFC 4462 section 3.2.
m.Payload = appendU32(m.Payload, 1)
m.Payload = appendString(m.Payload, string(krb5OID))
if err := c.writePacket(Marshal(m)); err != nil {
return authFailure, nil, err
}
// The server responds to the SSH_MSG_USERAUTH_REQUEST with either an
// SSH_MSG_USERAUTH_FAILURE if none of the mechanisms are supported or
// with an SSH_MSG_USERAUTH_GSSAPI_RESPONSE.
// See RFC 4462 section 3.3.
// OpenSSH supports Kerberos V5 mechanism only for GSS-API authentication,so I don't want to check
// selected mech if it is valid.
packet, err := c.readPacket()
if err != nil {
return authFailure, nil, err
}
userAuthGSSAPIResp := &userAuthGSSAPIResponse{}
if err := Unmarshal(packet, userAuthGSSAPIResp); err != nil {
return authFailure, nil, err
}
// Start the loop into the exchange token.
// See RFC 4462 section 3.4.
var token []byte
defer g.gssAPIClient.DeleteSecContext()
for {
// Initiates the establishment of a security context between the application and a remote peer.
nextToken, needContinue, err := g.gssAPIClient.InitSecContext("host@"+g.target, token, false)
if err != nil {
return authFailure, nil, err
}
if len(nextToken) > 0 {
if err := c.writePacket(Marshal(&userAuthGSSAPIToken{
Token: nextToken,
})); err != nil {
return authFailure, nil, err
}
}
if !needContinue {
break
}
packet, err = c.readPacket()
if err != nil {
return authFailure, nil, err
}
switch packet[0] {
case msgUserAuthFailure:
var msg userAuthFailureMsg
if err := Unmarshal(packet, &msg); err != nil {
return authFailure, nil, err
}
if msg.PartialSuccess {
return authPartialSuccess, msg.Methods, nil
}
return authFailure, msg.Methods, nil
case msgUserAuthGSSAPIError:
userAuthGSSAPIErrorResp := &userAuthGSSAPIError{}
if err := Unmarshal(packet, userAuthGSSAPIErrorResp); err != nil {
return authFailure, nil, err
}
return authFailure, nil, fmt.Errorf("GSS-API Error:\n"+
"Major Status: %d\n"+
"Minor Status: %d\n"+
"Error Message: %s\n", userAuthGSSAPIErrorResp.MajorStatus, userAuthGSSAPIErrorResp.MinorStatus,
userAuthGSSAPIErrorResp.Message)
case msgUserAuthGSSAPIToken:
userAuthGSSAPITokenReq := &userAuthGSSAPIToken{}
if err := Unmarshal(packet, userAuthGSSAPITokenReq); err != nil {
return authFailure, nil, err
}
token = userAuthGSSAPITokenReq.Token
}
}
// Binding Encryption Keys.
// See RFC 4462 section 3.5.
micField := buildMIC(string(session), user, "ssh-connection", "gssapi-with-mic")
micToken, err := g.gssAPIClient.GetMIC(micField)
if err != nil {
return authFailure, nil, err
}
if err := c.writePacket(Marshal(&userAuthGSSAPIMIC{
MIC: micToken,
})); err != nil {
return authFailure, nil, err
}
return handleAuthResponse(c)
}
func (g *gssAPIWithMICCallback) method() string {
return "gssapi-with-mic"
}

37
vendor/golang.org/x/crypto/ssh/common.go generated vendored
View File

@@ -51,6 +51,21 @@ var supportedKexAlgos = []string{
kexAlgoDH14SHA1, kexAlgoDH1SHA1,
}
// serverForbiddenKexAlgos contains key exchange algorithms, that are forbidden
// for the server half.
var serverForbiddenKexAlgos = map[string]struct{}{
kexAlgoDHGEXSHA1: {}, // server half implementation is only minimal to satisfy the automated tests
kexAlgoDHGEXSHA256: {}, // server half implementation is only minimal to satisfy the automated tests
}
// preferredKexAlgos specifies the default preference for key-exchange algorithms
// in preference order.
var preferredKexAlgos = []string{
kexAlgoCurve25519SHA256,
kexAlgoECDH256, kexAlgoECDH384, kexAlgoECDH521,
kexAlgoDH14SHA1,
}
// supportedHostKeyAlgos specifies the supported host-key algorithms (i.e. methods
// of authenticating servers) in preference order.
var supportedHostKeyAlgos = []string{
@@ -109,6 +124,7 @@ func findCommon(what string, client []string, server []string) (common string, e
return "", fmt.Errorf("ssh: no common algorithm for %s; client offered: %v, server offered: %v", what, client, server)
}
// directionAlgorithms records algorithm choices in one direction (either read or write)
type directionAlgorithms struct {
Cipher string
MAC string
@@ -137,7 +153,7 @@ type algorithms struct {
r directionAlgorithms
}
func findAgreedAlgorithms(clientKexInit, serverKexInit *kexInitMsg) (algs *algorithms, err error) {
func findAgreedAlgorithms(isClient bool, clientKexInit, serverKexInit *kexInitMsg) (algs *algorithms, err error) {
result := &algorithms{}
result.kex, err = findCommon("key exchange", clientKexInit.KexAlgos, serverKexInit.KexAlgos)
@@ -150,32 +166,37 @@ func findAgreedAlgorithms(clientKexInit, serverKexInit *kexInitMsg) (algs *algor
return
}
result.w.Cipher, err = findCommon("client to server cipher", clientKexInit.CiphersClientServer, serverKexInit.CiphersClientServer)
stoc, ctos := &result.w, &result.r
if isClient {
ctos, stoc = stoc, ctos
}
ctos.Cipher, err = findCommon("client to server cipher", clientKexInit.CiphersClientServer, serverKexInit.CiphersClientServer)
if err != nil {
return
}
result.r.Cipher, err = findCommon("server to client cipher", clientKexInit.CiphersServerClient, serverKexInit.CiphersServerClient)
stoc.Cipher, err = findCommon("server to client cipher", clientKexInit.CiphersServerClient, serverKexInit.CiphersServerClient)
if err != nil {
return
}
result.w.MAC, err = findCommon("client to server MAC", clientKexInit.MACsClientServer, serverKexInit.MACsClientServer)
ctos.MAC, err = findCommon("client to server MAC", clientKexInit.MACsClientServer, serverKexInit.MACsClientServer)
if err != nil {
return
}
result.r.MAC, err = findCommon("server to client MAC", clientKexInit.MACsServerClient, serverKexInit.MACsServerClient)
stoc.MAC, err = findCommon("server to client MAC", clientKexInit.MACsServerClient, serverKexInit.MACsServerClient)
if err != nil {
return
}
result.w.Compression, err = findCommon("client to server compression", clientKexInit.CompressionClientServer, serverKexInit.CompressionClientServer)
ctos.Compression, err = findCommon("client to server compression", clientKexInit.CompressionClientServer, serverKexInit.CompressionClientServer)
if err != nil {
return
}
result.r.Compression, err = findCommon("server to client compression", clientKexInit.CompressionServerClient, serverKexInit.CompressionServerClient)
stoc.Compression, err = findCommon("server to client compression", clientKexInit.CompressionServerClient, serverKexInit.CompressionServerClient)
if err != nil {
return
}
@@ -233,7 +254,7 @@ func (c *Config) SetDefaults() {
c.Ciphers = ciphers
if c.KeyExchanges == nil {
c.KeyExchanges = supportedKexAlgos
c.KeyExchanges = preferredKexAlgos
}
if c.MACs == nil {

5
vendor/golang.org/x/crypto/ssh/handshake.go generated vendored
View File

@@ -543,7 +543,8 @@ func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
clientInit := otherInit
serverInit := t.sentInitMsg
if len(t.hostKeys) == 0 {
isClient := len(t.hostKeys) == 0
if isClient {
clientInit, serverInit = serverInit, clientInit
magics.clientKexInit = t.sentInitPacket
@@ -551,7 +552,7 @@ func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
}
var err error
t.algorithms, err = findAgreedAlgorithms(clientInit, serverInit)
t.algorithms, err = findAgreedAlgorithms(isClient, clientInit, serverInit)
if err != nil {
return err
}

93
vendor/golang.org/x/crypto/ssh/internal/bcrypt_pbkdf/bcrypt_pbkdf.go generated vendored Normal file
View File

@@ -0,0 +1,93 @@
// Copyright 2014 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 bcrypt_pbkdf implements bcrypt_pbkdf(3) from OpenBSD.
//
// See https://flak.tedunangst.com/post/bcrypt-pbkdf and
// https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libutil/bcrypt_pbkdf.c.
package bcrypt_pbkdf
import (
"crypto/sha512"
"errors"
"golang.org/x/crypto/blowfish"
)
const blockSize = 32
// Key derives a key from the password, salt and rounds count, returning a
// []byte of length keyLen that can be used as cryptographic key.
func Key(password, salt []byte, rounds, keyLen int) ([]byte, error) {
if rounds < 1 {
return nil, errors.New("bcrypt_pbkdf: number of rounds is too small")
}
if len(password) == 0 {
return nil, errors.New("bcrypt_pbkdf: empty password")
}
if len(salt) == 0 || len(salt) > 1<<20 {
return nil, errors.New("bcrypt_pbkdf: bad salt length")
}
if keyLen > 1024 {
return nil, errors.New("bcrypt_pbkdf: keyLen is too large")
}
numBlocks := (keyLen + blockSize - 1) / blockSize
key := make([]byte, numBlocks*blockSize)
h := sha512.New()
h.Write(password)
shapass := h.Sum(nil)
shasalt := make([]byte, 0, sha512.Size)
cnt, tmp := make([]byte, 4), make([]byte, blockSize)
for block := 1; block <= numBlocks; block++ {
h.Reset()
h.Write(salt)
cnt[0] = byte(block >> 24)
cnt[1] = byte(block >> 16)
cnt[2] = byte(block >> 8)
cnt[3] = byte(block)
h.Write(cnt)
bcryptHash(tmp, shapass, h.Sum(shasalt))
out := make([]byte, blockSize)
copy(out, tmp)
for i := 2; i <= rounds; i++ {
h.Reset()
h.Write(tmp)
bcryptHash(tmp, shapass, h.Sum(shasalt))
for j := 0; j < len(out); j++ {
out[j] ^= tmp[j]
}
}
for i, v := range out {
key[i*numBlocks+(block-1)] = v
}
}
return key[:keyLen], nil
}
var magic = []byte("OxychromaticBlowfishSwatDynamite")
func bcryptHash(out, shapass, shasalt []byte) {
c, err := blowfish.NewSaltedCipher(shapass, shasalt)
if err != nil {
panic(err)
}
for i := 0; i < 64; i++ {
blowfish.ExpandKey(shasalt, c)
blowfish.ExpandKey(shapass, c)
}
copy(out, magic)
for i := 0; i < 32; i += 8 {
for j := 0; j < 64; j++ {
c.Encrypt(out[i:i+8], out[i:i+8])
}
}
// Swap bytes due to different endianness.
for i := 0; i < 32; i += 4 {
out[i+3], out[i+2], out[i+1], out[i] = out[i], out[i+1], out[i+2], out[i+3]
}
}

251
vendor/golang.org/x/crypto/ssh/kex.go generated vendored
View File

@@ -10,7 +10,9 @@ import (
"crypto/elliptic"
"crypto/rand"
"crypto/subtle"
"encoding/binary"
"errors"
"fmt"
"io"
"math/big"
@@ -24,6 +26,12 @@ const (
kexAlgoECDH384 = "ecdh-sha2-nistp384"
kexAlgoECDH521 = "ecdh-sha2-nistp521"
kexAlgoCurve25519SHA256 = "curve25519-sha256@libssh.org"
// For the following kex only the client half contains a production
// ready implementation. The server half only consists of a minimal
// implementation to satisfy the automated tests.
kexAlgoDHGEXSHA1 = "diffie-hellman-group-exchange-sha1"
kexAlgoDHGEXSHA256 = "diffie-hellman-group-exchange-sha256"
)
// kexResult captures the outcome of a key exchange.
@@ -204,7 +212,7 @@ func (group *dhGroup) Server(c packetConn, randSource io.Reader, magics *handsha
HostKey: hostKeyBytes,
Signature: sig,
Hash: crypto.SHA1,
}, nil
}, err
}
// ecdh performs Elliptic Curve Diffie-Hellman key exchange as
@@ -402,6 +410,8 @@ func init() {
kexAlgoMap[kexAlgoECDH384] = &ecdh{elliptic.P384()}
kexAlgoMap[kexAlgoECDH256] = &ecdh{elliptic.P256()}
kexAlgoMap[kexAlgoCurve25519SHA256] = &curve25519sha256{}
kexAlgoMap[kexAlgoDHGEXSHA1] = &dhGEXSHA{hashFunc: crypto.SHA1}
kexAlgoMap[kexAlgoDHGEXSHA256] = &dhGEXSHA{hashFunc: crypto.SHA256}
}
// curve25519sha256 implements the curve25519-sha256@libssh.org key
@@ -538,3 +548,242 @@ func (kex *curve25519sha256) Server(c packetConn, rand io.Reader, magics *handsh
Hash: crypto.SHA256,
}, nil
}
// dhGEXSHA implements the diffie-hellman-group-exchange-sha1 and
// diffie-hellman-group-exchange-sha256 key agreement protocols,
// as described in RFC 4419
type dhGEXSHA struct {
g, p *big.Int
hashFunc crypto.Hash
}
const numMRTests = 64
const (
dhGroupExchangeMinimumBits = 2048
dhGroupExchangePreferredBits = 2048
dhGroupExchangeMaximumBits = 8192
)
func (gex *dhGEXSHA) diffieHellman(theirPublic, myPrivate *big.Int) (*big.Int, error) {
if theirPublic.Sign() <= 0 || theirPublic.Cmp(gex.p) >= 0 {
return nil, fmt.Errorf("ssh: DH parameter out of bounds")
}
return new(big.Int).Exp(theirPublic, myPrivate, gex.p), nil
}
func (gex dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshakeMagics) (*kexResult, error) {
// Send GexRequest
kexDHGexRequest := kexDHGexRequestMsg{
MinBits: dhGroupExchangeMinimumBits,
PreferedBits: dhGroupExchangePreferredBits,
MaxBits: dhGroupExchangeMaximumBits,
}
if err := c.writePacket(Marshal(&kexDHGexRequest)); err != nil {
return nil, err
}
// Receive GexGroup
packet, err := c.readPacket()
if err != nil {
return nil, err
}
var kexDHGexGroup kexDHGexGroupMsg
if err = Unmarshal(packet, &kexDHGexGroup); err != nil {
return nil, err
}
// reject if p's bit length < dhGroupExchangeMinimumBits or > dhGroupExchangeMaximumBits
if kexDHGexGroup.P.BitLen() < dhGroupExchangeMinimumBits || kexDHGexGroup.P.BitLen() > dhGroupExchangeMaximumBits {
return nil, fmt.Errorf("ssh: server-generated gex p is out of range (%d bits)", kexDHGexGroup.P.BitLen())
}
gex.p = kexDHGexGroup.P
gex.g = kexDHGexGroup.G
// Check if p is safe by verifing that p and (p-1)/2 are primes
one := big.NewInt(1)
var pHalf = &big.Int{}
pHalf.Rsh(gex.p, 1)
if !gex.p.ProbablyPrime(numMRTests) || !pHalf.ProbablyPrime(numMRTests) {
return nil, fmt.Errorf("ssh: server provided gex p is not safe")
}
// Check if g is safe by verifing that g > 1 and g < p - 1
var pMinusOne = &big.Int{}
pMinusOne.Sub(gex.p, one)
if gex.g.Cmp(one) != 1 && gex.g.Cmp(pMinusOne) != -1 {
return nil, fmt.Errorf("ssh: server provided gex g is not safe")
}
// Send GexInit
x, err := rand.Int(randSource, pHalf)
if err != nil {
return nil, err
}
X := new(big.Int).Exp(gex.g, x, gex.p)
kexDHGexInit := kexDHGexInitMsg{
X: X,
}
if err := c.writePacket(Marshal(&kexDHGexInit)); err != nil {
return nil, err
}
// Receive GexReply
packet, err = c.readPacket()
if err != nil {
return nil, err
}
var kexDHGexReply kexDHGexReplyMsg
if err = Unmarshal(packet, &kexDHGexReply); err != nil {
return nil, err
}
kInt, err := gex.diffieHellman(kexDHGexReply.Y, x)
if err != nil {
return nil, err
}
// Check if k is safe by verifing that k > 1 and k < p - 1
if kInt.Cmp(one) != 1 && kInt.Cmp(pMinusOne) != -1 {
return nil, fmt.Errorf("ssh: derived k is not safe")
}
h := gex.hashFunc.New()
magics.write(h)
writeString(h, kexDHGexReply.HostKey)
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMinimumBits))
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangePreferredBits))
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMaximumBits))
writeInt(h, gex.p)
writeInt(h, gex.g)
writeInt(h, X)
writeInt(h, kexDHGexReply.Y)
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
h.Write(K)
return &kexResult{
H: h.Sum(nil),
K: K,
HostKey: kexDHGexReply.HostKey,
Signature: kexDHGexReply.Signature,
Hash: gex.hashFunc,
}, nil
}
// Server half implementation of the Diffie Hellman Key Exchange with SHA1 and SHA256.
//
// This is a minimal implementation to satisfy the automated tests.
func (gex dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshakeMagics, priv Signer) (result *kexResult, err error) {
// Receive GexRequest
packet, err := c.readPacket()
if err != nil {
return
}
var kexDHGexRequest kexDHGexRequestMsg
if err = Unmarshal(packet, &kexDHGexRequest); err != nil {
return
}
// smoosh the user's preferred size into our own limits
if kexDHGexRequest.PreferedBits > dhGroupExchangeMaximumBits {
kexDHGexRequest.PreferedBits = dhGroupExchangeMaximumBits
}
if kexDHGexRequest.PreferedBits < dhGroupExchangeMinimumBits {
kexDHGexRequest.PreferedBits = dhGroupExchangeMinimumBits
}
// fix min/max if they're inconsistent. technically, we could just pout
// and hang up, but there's no harm in giving them the benefit of the
// doubt and just picking a bitsize for them.
if kexDHGexRequest.MinBits > kexDHGexRequest.PreferedBits {
kexDHGexRequest.MinBits = kexDHGexRequest.PreferedBits
}
if kexDHGexRequest.MaxBits < kexDHGexRequest.PreferedBits {
kexDHGexRequest.MaxBits = kexDHGexRequest.PreferedBits
}
// Send GexGroup
// This is the group called diffie-hellman-group14-sha1 in RFC
// 4253 and Oakley Group 14 in RFC 3526.
p, _ := new(big.Int).SetString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
gex.p = p
gex.g = big.NewInt(2)
kexDHGexGroup := kexDHGexGroupMsg{
P: gex.p,
G: gex.g,
}
if err := c.writePacket(Marshal(&kexDHGexGroup)); err != nil {
return nil, err
}
// Receive GexInit
packet, err = c.readPacket()
if err != nil {
return
}
var kexDHGexInit kexDHGexInitMsg
if err = Unmarshal(packet, &kexDHGexInit); err != nil {
return
}
var pHalf = &big.Int{}
pHalf.Rsh(gex.p, 1)
y, err := rand.Int(randSource, pHalf)
if err != nil {
return
}
Y := new(big.Int).Exp(gex.g, y, gex.p)
kInt, err := gex.diffieHellman(kexDHGexInit.X, y)
if err != nil {
return nil, err
}
hostKeyBytes := priv.PublicKey().Marshal()
h := gex.hashFunc.New()
magics.write(h)
writeString(h, hostKeyBytes)
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMinimumBits))
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangePreferredBits))
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMaximumBits))
writeInt(h, gex.p)
writeInt(h, gex.g)
writeInt(h, kexDHGexInit.X)
writeInt(h, Y)
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
h.Write(K)
H := h.Sum(nil)
// H is already a hash, but the hostkey signing will apply its
// own key-specific hash algorithm.
sig, err := signAndMarshal(priv, randSource, H)
if err != nil {
return nil, err
}
kexDHGexReply := kexDHGexReplyMsg{
HostKey: hostKeyBytes,
Y: Y,
Signature: sig,
}
packet = Marshal(&kexDHGexReply)
err = c.writePacket(packet)
return &kexResult{
H: H,
K: K,
HostKey: hostKeyBytes,
Signature: sig,
Hash: gex.hashFunc,
}, err
}

482
vendor/golang.org/x/crypto/ssh/keys.go generated vendored
View File

@@ -7,6 +7,8 @@ package ssh
import (
"bytes"
"crypto"
"crypto/aes"
"crypto/cipher"
"crypto/dsa"
"crypto/ecdsa"
"crypto/elliptic"
@@ -25,17 +27,20 @@ import (
"strings"
"golang.org/x/crypto/ed25519"
"golang.org/x/crypto/ssh/internal/bcrypt_pbkdf"
)
// These constants represent the algorithm names for key types supported by this
// package.
const (
KeyAlgoRSA = "ssh-rsa"
KeyAlgoDSA = "ssh-dss"
KeyAlgoECDSA256 = "ecdsa-sha2-nistp256"
KeyAlgoECDSA384 = "ecdsa-sha2-nistp384"
KeyAlgoECDSA521 = "ecdsa-sha2-nistp521"
KeyAlgoED25519 = "ssh-ed25519"
KeyAlgoRSA = "ssh-rsa"
KeyAlgoDSA = "ssh-dss"
KeyAlgoECDSA256 = "ecdsa-sha2-nistp256"
KeyAlgoSKECDSA256 = "sk-ecdsa-sha2-nistp256@openssh.com"
KeyAlgoECDSA384 = "ecdsa-sha2-nistp384"
KeyAlgoECDSA521 = "ecdsa-sha2-nistp521"
KeyAlgoED25519 = "ssh-ed25519"
KeyAlgoSKED25519 = "sk-ssh-ed25519@openssh.com"
)
// These constants represent non-default signature algorithms that are supported
@@ -58,9 +63,13 @@ func parsePubKey(in []byte, algo string) (pubKey PublicKey, rest []byte, err err
return parseDSA(in)
case KeyAlgoECDSA256, KeyAlgoECDSA384, KeyAlgoECDSA521:
return parseECDSA(in)
case KeyAlgoSKECDSA256:
return parseSKECDSA(in)
case KeyAlgoED25519:
return parseED25519(in)
case CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01, CertAlgoED25519v01:
case KeyAlgoSKED25519:
return parseSKEd25519(in)
case CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01, CertAlgoSKECDSA256v01, CertAlgoED25519v01, CertAlgoSKED25519v01:
cert, err := parseCert(in, certToPrivAlgo(algo))
if err != nil {
return nil, nil, err
@@ -553,9 +562,11 @@ func parseED25519(in []byte) (out PublicKey, rest []byte, err error) {
return nil, nil, err
}
key := ed25519.PublicKey(w.KeyBytes)
if l := len(w.KeyBytes); l != ed25519.PublicKeySize {
return nil, nil, fmt.Errorf("invalid size %d for Ed25519 public key", l)
}
return (ed25519PublicKey)(key), w.Rest, nil
return ed25519PublicKey(w.KeyBytes), w.Rest, nil
}
func (k ed25519PublicKey) Marshal() []byte {
@@ -573,9 +584,11 @@ func (k ed25519PublicKey) Verify(b []byte, sig *Signature) error {
if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, k.Type())
}
if l := len(k); l != ed25519.PublicKeySize {
return fmt.Errorf("ssh: invalid size %d for Ed25519 public key", l)
}
edKey := (ed25519.PublicKey)(k)
if ok := ed25519.Verify(edKey, b, sig.Blob); !ok {
if ok := ed25519.Verify(ed25519.PublicKey(k), b, sig.Blob); !ok {
return errors.New("ssh: signature did not verify")
}
@@ -685,6 +698,224 @@ func (k *ecdsaPublicKey) CryptoPublicKey() crypto.PublicKey {
return (*ecdsa.PublicKey)(k)
}
// skFields holds the additional fields present in U2F/FIDO2 signatures.
// See openssh/PROTOCOL.u2f 'SSH U2F Signatures' for details.
type skFields struct {
// Flags contains U2F/FIDO2 flags such as 'user present'
Flags byte
// Counter is a monotonic signature counter which can be
// used to detect concurrent use of a private key, should
// it be extracted from hardware.
Counter uint32
}
type skECDSAPublicKey struct {
// application is a URL-like string, typically "ssh:" for SSH.
// see openssh/PROTOCOL.u2f for details.
application string
ecdsa.PublicKey
}
func (k *skECDSAPublicKey) Type() string {
return KeyAlgoSKECDSA256
}
func (k *skECDSAPublicKey) nistID() string {
return "nistp256"
}
func parseSKECDSA(in []byte) (out PublicKey, rest []byte, err error) {
var w struct {
Curve string
KeyBytes []byte
Application string
Rest []byte `ssh:"rest"`
}
if err := Unmarshal(in, &w); err != nil {
return nil, nil, err
}
key := new(skECDSAPublicKey)
key.application = w.Application
if w.Curve != "nistp256" {
return nil, nil, errors.New("ssh: unsupported curve")
}
key.Curve = elliptic.P256()
key.X, key.Y = elliptic.Unmarshal(key.Curve, w.KeyBytes)
if key.X == nil || key.Y == nil {
return nil, nil, errors.New("ssh: invalid curve point")
}
return key, w.Rest, nil
}
func (k *skECDSAPublicKey) Marshal() []byte {
// See RFC 5656, section 3.1.
keyBytes := elliptic.Marshal(k.Curve, k.X, k.Y)
w := struct {
Name string
ID string
Key []byte
Application string
}{
k.Type(),
k.nistID(),
keyBytes,
k.application,
}
return Marshal(&w)
}
func (k *skECDSAPublicKey) Verify(data []byte, sig *Signature) error {
if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, k.Type())
}
h := ecHash(k.Curve).New()
h.Write([]byte(k.application))
appDigest := h.Sum(nil)
h.Reset()
h.Write(data)
dataDigest := h.Sum(nil)
var ecSig struct {
R *big.Int
S *big.Int
}
if err := Unmarshal(sig.Blob, &ecSig); err != nil {
return err
}
var skf skFields
if err := Unmarshal(sig.Rest, &skf); err != nil {
return err
}
blob := struct {
ApplicationDigest []byte `ssh:"rest"`
Flags byte
Counter uint32
MessageDigest []byte `ssh:"rest"`
}{
appDigest,
skf.Flags,
skf.Counter,
dataDigest,
}
original := Marshal(blob)
h.Reset()
h.Write(original)
digest := h.Sum(nil)
if ecdsa.Verify((*ecdsa.PublicKey)(&k.PublicKey), digest, ecSig.R, ecSig.S) {
return nil
}
return errors.New("ssh: signature did not verify")
}
type skEd25519PublicKey struct {
// application is a URL-like string, typically "ssh:" for SSH.
// see openssh/PROTOCOL.u2f for details.
application string
ed25519.PublicKey
}
func (k *skEd25519PublicKey) Type() string {
return KeyAlgoSKED25519
}
func parseSKEd25519(in []byte) (out PublicKey, rest []byte, err error) {
var w struct {
KeyBytes []byte
Application string
Rest []byte `ssh:"rest"`
}
if err := Unmarshal(in, &w); err != nil {
return nil, nil, err
}
if l := len(w.KeyBytes); l != ed25519.PublicKeySize {
return nil, nil, fmt.Errorf("invalid size %d for Ed25519 public key", l)
}
key := new(skEd25519PublicKey)
key.application = w.Application
key.PublicKey = ed25519.PublicKey(w.KeyBytes)
return key, w.Rest, nil
}
func (k *skEd25519PublicKey) Marshal() []byte {
w := struct {
Name string
KeyBytes []byte
Application string
}{
KeyAlgoSKED25519,
[]byte(k.PublicKey),
k.application,
}
return Marshal(&w)
}
func (k *skEd25519PublicKey) Verify(data []byte, sig *Signature) error {
if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, k.Type())
}
if l := len(k.PublicKey); l != ed25519.PublicKeySize {
return fmt.Errorf("invalid size %d for Ed25519 public key", l)
}
h := sha256.New()
h.Write([]byte(k.application))
appDigest := h.Sum(nil)
h.Reset()
h.Write(data)
dataDigest := h.Sum(nil)
var edSig struct {
Signature []byte `ssh:"rest"`
}
if err := Unmarshal(sig.Blob, &edSig); err != nil {
return err
}
var skf skFields
if err := Unmarshal(sig.Rest, &skf); err != nil {
return err
}
blob := struct {
ApplicationDigest []byte `ssh:"rest"`
Flags byte
Counter uint32
MessageDigest []byte `ssh:"rest"`
}{
appDigest,
skf.Flags,
skf.Counter,
dataDigest,
}
original := Marshal(blob)
if ok := ed25519.Verify(k.PublicKey, original, edSig.Signature); !ok {
return errors.New("ssh: signature did not verify")
}
return nil
}
// NewSignerFromKey takes an *rsa.PrivateKey, *dsa.PrivateKey,
// *ecdsa.PrivateKey or any other crypto.Signer and returns a
// corresponding Signer instance. ECDSA keys must use P-256, P-384 or
@@ -830,14 +1061,18 @@ func NewPublicKey(key interface{}) (PublicKey, error) {
case *dsa.PublicKey:
return (*dsaPublicKey)(key), nil
case ed25519.PublicKey:
return (ed25519PublicKey)(key), nil
if l := len(key); l != ed25519.PublicKeySize {
return nil, fmt.Errorf("ssh: invalid size %d for Ed25519 public key", l)
}
return ed25519PublicKey(key), nil
default:
return nil, fmt.Errorf("ssh: unsupported key type %T", key)
}
}
// ParsePrivateKey returns a Signer from a PEM encoded private key. It supports
// the same keys as ParseRawPrivateKey.
// the same keys as ParseRawPrivateKey. If the private key is encrypted, it
// will return a PassphraseMissingError.
func ParsePrivateKey(pemBytes []byte) (Signer, error) {
key, err := ParseRawPrivateKey(pemBytes)
if err != nil {
@@ -850,8 +1085,8 @@ func ParsePrivateKey(pemBytes []byte) (Signer, error) {
// ParsePrivateKeyWithPassphrase returns a Signer from a PEM encoded private
// key and passphrase. It supports the same keys as
// ParseRawPrivateKeyWithPassphrase.
func ParsePrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (Signer, error) {
key, err := ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase)
func ParsePrivateKeyWithPassphrase(pemBytes, passphrase []byte) (Signer, error) {
key, err := ParseRawPrivateKeyWithPassphrase(pemBytes, passphrase)
if err != nil {
return nil, err
}
@@ -867,8 +1102,21 @@ func encryptedBlock(block *pem.Block) bool {
return strings.Contains(block.Headers["Proc-Type"], "ENCRYPTED")
}
// A PassphraseMissingError indicates that parsing this private key requires a
// passphrase. Use ParsePrivateKeyWithPassphrase.
type PassphraseMissingError struct {
// PublicKey will be set if the private key format includes an unencrypted
// public key along with the encrypted private key.
PublicKey PublicKey
}
func (*PassphraseMissingError) Error() string {
return "ssh: this private key is passphrase protected"
}
// ParseRawPrivateKey returns a private key from a PEM encoded private key. It
// supports RSA (PKCS#1), PKCS#8, DSA (OpenSSL), and ECDSA private keys.
// supports RSA (PKCS#1), PKCS#8, DSA (OpenSSL), and ECDSA private keys. If the
// private key is encrypted, it will return a PassphraseMissingError.
func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
block, _ := pem.Decode(pemBytes)
if block == nil {
@@ -876,7 +1124,7 @@ func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
}
if encryptedBlock(block) {
return nil, errors.New("ssh: cannot decode encrypted private keys")
return nil, &PassphraseMissingError{}
}
switch block.Type {
@@ -890,33 +1138,35 @@ func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
case "DSA PRIVATE KEY":
return ParseDSAPrivateKey(block.Bytes)
case "OPENSSH PRIVATE KEY":
return parseOpenSSHPrivateKey(block.Bytes)
return parseOpenSSHPrivateKey(block.Bytes, unencryptedOpenSSHKey)
default:
return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type)
}
}
// ParseRawPrivateKeyWithPassphrase returns a private key decrypted with
// passphrase from a PEM encoded private key. If wrong passphrase, return
// x509.IncorrectPasswordError.
func ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (interface{}, error) {
// passphrase from a PEM encoded private key. If the passphrase is wrong, it
// will return x509.IncorrectPasswordError.
func ParseRawPrivateKeyWithPassphrase(pemBytes, passphrase []byte) (interface{}, error) {
block, _ := pem.Decode(pemBytes)
if block == nil {
return nil, errors.New("ssh: no key found")
}
buf := block.Bytes
if encryptedBlock(block) {
if x509.IsEncryptedPEMBlock(block) {
var err error
buf, err = x509.DecryptPEMBlock(block, passPhrase)
if err != nil {
if err == x509.IncorrectPasswordError {
return nil, err
}
return nil, fmt.Errorf("ssh: cannot decode encrypted private keys: %v", err)
}
if block.Type == "OPENSSH PRIVATE KEY" {
return parseOpenSSHPrivateKey(block.Bytes, passphraseProtectedOpenSSHKey(passphrase))
}
if !encryptedBlock(block) || !x509.IsEncryptedPEMBlock(block) {
return nil, errors.New("ssh: not an encrypted key")
}
buf, err := x509.DecryptPEMBlock(block, passphrase)
if err != nil {
if err == x509.IncorrectPasswordError {
return nil, err
}
return nil, fmt.Errorf("ssh: cannot decode encrypted private keys: %v", err)
}
switch block.Type {
@@ -926,8 +1176,6 @@ func ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (interface{},
return x509.ParseECPrivateKey(buf)
case "DSA PRIVATE KEY":
return ParseDSAPrivateKey(buf)
case "OPENSSH PRIVATE KEY":
return parseOpenSSHPrivateKey(buf)
default:
return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type)
}
@@ -965,9 +1213,68 @@ func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) {
}, nil
}
// Implemented based on the documentation at
// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key
func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
func unencryptedOpenSSHKey(cipherName, kdfName, kdfOpts string, privKeyBlock []byte) ([]byte, error) {
if kdfName != "none" || cipherName != "none" {
return nil, &PassphraseMissingError{}
}
if kdfOpts != "" {
return nil, errors.New("ssh: invalid openssh private key")
}
return privKeyBlock, nil
}
func passphraseProtectedOpenSSHKey(passphrase []byte) openSSHDecryptFunc {
return func(cipherName, kdfName, kdfOpts string, privKeyBlock []byte) ([]byte, error) {
if kdfName == "none" || cipherName == "none" {
return nil, errors.New("ssh: key is not password protected")
}
if kdfName != "bcrypt" {
return nil, fmt.Errorf("ssh: unknown KDF %q, only supports %q", kdfName, "bcrypt")
}
var opts struct {
Salt string
Rounds uint32
}
if err := Unmarshal([]byte(kdfOpts), &opts); err != nil {
return nil, err
}
k, err := bcrypt_pbkdf.Key(passphrase, []byte(opts.Salt), int(opts.Rounds), 32+16)
if err != nil {
return nil, err
}
key, iv := k[:32], k[32:]
c, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
switch cipherName {
case "aes256-ctr":
ctr := cipher.NewCTR(c, iv)
ctr.XORKeyStream(privKeyBlock, privKeyBlock)
case "aes256-cbc":
if len(privKeyBlock)%c.BlockSize() != 0 {
return nil, fmt.Errorf("ssh: invalid encrypted private key length, not a multiple of the block size")
}
cbc := cipher.NewCBCDecrypter(c, iv)
cbc.CryptBlocks(privKeyBlock, privKeyBlock)
default:
return nil, fmt.Errorf("ssh: unknown cipher %q, only supports %q or %q", cipherName, "aes256-ctr", "aes256-cbc")
}
return privKeyBlock, nil
}
}
type openSSHDecryptFunc func(CipherName, KdfName, KdfOpts string, PrivKeyBlock []byte) ([]byte, error)
// parseOpenSSHPrivateKey parses an OpenSSH private key, using the decrypt
// function to unwrap the encrypted portion. unencryptedOpenSSHKey can be used
// as the decrypt function to parse an unencrypted private key. See
// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key.
func parseOpenSSHPrivateKey(key []byte, decrypt openSSHDecryptFunc) (crypto.PrivateKey, error) {
const magic = "openssh-key-v1\x00"
if len(key) < len(magic) || string(key[:len(magic)]) != magic {
return nil, errors.New("ssh: invalid openssh private key format")
@@ -986,9 +1293,22 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
if err := Unmarshal(remaining, &w); err != nil {
return nil, err
}
if w.NumKeys != 1 {
// We only support single key files, and so does OpenSSH.
// https://github.com/openssh/openssh-portable/blob/4103a3ec7/sshkey.c#L4171
return nil, errors.New("ssh: multi-key files are not supported")
}
if w.KdfName != "none" || w.CipherName != "none" {
return nil, errors.New("ssh: cannot decode encrypted private keys")
privKeyBlock, err := decrypt(w.CipherName, w.KdfName, w.KdfOpts, w.PrivKeyBlock)
if err != nil {
if err, ok := err.(*PassphraseMissingError); ok {
pub, errPub := ParsePublicKey(w.PubKey)
if errPub != nil {
return nil, fmt.Errorf("ssh: failed to parse embedded public key: %v", errPub)
}
err.PublicKey = pub
}
return nil, err
}
pk1 := struct {
@@ -998,15 +1318,13 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
Rest []byte `ssh:"rest"`
}{}
if err := Unmarshal(w.PrivKeyBlock, &pk1); err != nil {
return nil, err
if err := Unmarshal(privKeyBlock, &pk1); err != nil || pk1.Check1 != pk1.Check2 {
if w.CipherName != "none" {
return nil, x509.IncorrectPasswordError
}
return nil, errors.New("ssh: malformed OpenSSH key")
}
if pk1.Check1 != pk1.Check2 {
return nil, errors.New("ssh: checkint mismatch")
}
// we only handle ed25519 and rsa keys currently
switch pk1.Keytype {
case KeyAlgoRSA:
// https://github.com/openssh/openssh-portable/blob/master/sshkey.c#L2760-L2773
@@ -1025,10 +1343,8 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
return nil, err
}
for i, b := range key.Pad {
if int(b) != i+1 {
return nil, errors.New("ssh: padding not as expected")
}
if err := checkOpenSSHKeyPadding(key.Pad); err != nil {
return nil, err
}
pk := &rsa.PrivateKey{
@@ -1063,20 +1379,78 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
return nil, errors.New("ssh: private key unexpected length")
}
for i, b := range key.Pad {
if int(b) != i+1 {
return nil, errors.New("ssh: padding not as expected")
}
if err := checkOpenSSHKeyPadding(key.Pad); err != nil {
return nil, err
}
pk := ed25519.PrivateKey(make([]byte, ed25519.PrivateKeySize))
copy(pk, key.Priv)
return &pk, nil
case KeyAlgoECDSA256, KeyAlgoECDSA384, KeyAlgoECDSA521:
key := struct {
Curve string
Pub []byte
D *big.Int
Comment string
Pad []byte `ssh:"rest"`
}{}
if err := Unmarshal(pk1.Rest, &key); err != nil {
return nil, err
}
if err := checkOpenSSHKeyPadding(key.Pad); err != nil {
return nil, err
}
var curve elliptic.Curve
switch key.Curve {
case "nistp256":
curve = elliptic.P256()
case "nistp384":
curve = elliptic.P384()
case "nistp521":
curve = elliptic.P521()
default:
return nil, errors.New("ssh: unhandled elliptic curve: " + key.Curve)
}
X, Y := elliptic.Unmarshal(curve, key.Pub)
if X == nil || Y == nil {
return nil, errors.New("ssh: failed to unmarshal public key")
}
if key.D.Cmp(curve.Params().N) >= 0 {
return nil, errors.New("ssh: scalar is out of range")
}
x, y := curve.ScalarBaseMult(key.D.Bytes())
if x.Cmp(X) != 0 || y.Cmp(Y) != 0 {
return nil, errors.New("ssh: public key does not match private key")
}
return &ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: curve,
X: X,
Y: Y,
},
D: key.D,
}, nil
default:
return nil, errors.New("ssh: unhandled key type")
}
}
func checkOpenSSHKeyPadding(pad []byte) error {
for i, b := range pad {
if int(b) != i+1 {
return errors.New("ssh: padding not as expected")
}
}
return nil
}
// FingerprintLegacyMD5 returns the user presentation of the key's
// fingerprint as described by RFC 4716 section 4.
func FingerprintLegacyMD5(pubKey PublicKey) string {

100
vendor/golang.org/x/crypto/ssh/messages.go generated vendored
View File

@@ -97,6 +97,36 @@ type kexDHReplyMsg struct {
Signature []byte
}
// See RFC 4419, section 5.
const msgKexDHGexGroup = 31
type kexDHGexGroupMsg struct {
P *big.Int `sshtype:"31"`
G *big.Int
}
const msgKexDHGexInit = 32
type kexDHGexInitMsg struct {
X *big.Int `sshtype:"32"`
}
const msgKexDHGexReply = 33
type kexDHGexReplyMsg struct {
HostKey []byte `sshtype:"33"`
Y *big.Int
Signature []byte
}
const msgKexDHGexRequest = 34
type kexDHGexRequestMsg struct {
MinBits uint32 `sshtype:"34"`
PreferedBits uint32
MaxBits uint32
}
// See RFC 4253, section 10.
const msgServiceRequest = 5
@@ -275,6 +305,42 @@ type userAuthPubKeyOkMsg struct {
PubKey []byte
}
// See RFC 4462, section 3
const msgUserAuthGSSAPIResponse = 60
type userAuthGSSAPIResponse struct {
SupportMech []byte `sshtype:"60"`
}
const msgUserAuthGSSAPIToken = 61
type userAuthGSSAPIToken struct {
Token []byte `sshtype:"61"`
}
const msgUserAuthGSSAPIMIC = 66
type userAuthGSSAPIMIC struct {
MIC []byte `sshtype:"66"`
}
// See RFC 4462, section 3.9
const msgUserAuthGSSAPIErrTok = 64
type userAuthGSSAPIErrTok struct {
ErrorToken []byte `sshtype:"64"`
}
// See RFC 4462, section 3.8
const msgUserAuthGSSAPIError = 65
type userAuthGSSAPIError struct {
MajorStatus uint32 `sshtype:"65"`
MinorStatus uint32
Message string
LanguageTag string
}
// typeTags returns the possible type bytes for the given reflect.Type, which
// should be a struct. The possible values are separated by a '|' character.
func typeTags(structType reflect.Type) (tags []byte) {
@@ -756,6 +822,14 @@ func decode(packet []byte) (interface{}, error) {
msg = new(channelRequestSuccessMsg)
case msgChannelFailure:
msg = new(channelRequestFailureMsg)
case msgUserAuthGSSAPIToken:
msg = new(userAuthGSSAPIToken)
case msgUserAuthGSSAPIMIC:
msg = new(userAuthGSSAPIMIC)
case msgUserAuthGSSAPIErrTok:
msg = new(userAuthGSSAPIErrTok)
case msgUserAuthGSSAPIError:
msg = new(userAuthGSSAPIError)
default:
return nil, unexpectedMessageError(0, packet[0])
}
@@ -764,3 +838,29 @@ func decode(packet []byte) (interface{}, error) {
}
return msg, nil
}
var packetTypeNames = map[byte]string{
msgDisconnect: "disconnectMsg",
msgServiceRequest: "serviceRequestMsg",
msgServiceAccept: "serviceAcceptMsg",
msgKexInit: "kexInitMsg",
msgKexDHInit: "kexDHInitMsg",
msgKexDHReply: "kexDHReplyMsg",
msgUserAuthRequest: "userAuthRequestMsg",
msgUserAuthSuccess: "userAuthSuccessMsg",
msgUserAuthFailure: "userAuthFailureMsg",
msgUserAuthPubKeyOk: "userAuthPubKeyOkMsg",
msgGlobalRequest: "globalRequestMsg",
msgRequestSuccess: "globalRequestSuccessMsg",
msgRequestFailure: "globalRequestFailureMsg",
msgChannelOpen: "channelOpenMsg",
msgChannelData: "channelDataMsg",
msgChannelOpenConfirm: "channelOpenConfirmMsg",
msgChannelOpenFailure: "channelOpenFailureMsg",
msgChannelWindowAdjust: "windowAdjustMsg",
msgChannelEOF: "channelEOFMsg",
msgChannelClose: "channelCloseMsg",
msgChannelRequest: "channelRequestMsg",
msgChannelSuccess: "channelRequestSuccessMsg",
msgChannelFailure: "channelRequestFailureMsg",
}

23
vendor/golang.org/x/crypto/ssh/mux.go generated vendored
View File

@@ -240,7 +240,7 @@ func (m *mux) onePacket() error {
id := binary.BigEndian.Uint32(packet[1:])
ch := m.chanList.getChan(id)
if ch == nil {
return fmt.Errorf("ssh: invalid channel %d", id)
return m.handleUnknownChannelPacket(id, packet)
}
return ch.handlePacket(packet)
@@ -328,3 +328,24 @@ func (m *mux) openChannel(chanType string, extra []byte) (*channel, error) {
return nil, fmt.Errorf("ssh: unexpected packet in response to channel open: %T", msg)
}
}
func (m *mux) handleUnknownChannelPacket(id uint32, packet []byte) error {
msg, err := decode(packet)
if err != nil {
return err
}
switch msg := msg.(type) {
// RFC 4254 section 5.4 says unrecognized channel requests should
// receive a failure response.
case *channelRequestMsg:
if msg.WantReply {
return m.sendMessage(channelRequestFailureMsg{
PeersID: msg.PeersID,
})
}
return nil
default:
return fmt.Errorf("ssh: invalid channel %d", id)
}
}

128
vendor/golang.org/x/crypto/ssh/server.go generated vendored
View File

@@ -45,6 +45,20 @@ type Permissions struct {
Extensions map[string]string
}
type GSSAPIWithMICConfig struct {
// AllowLogin, must be set, is called when gssapi-with-mic
// authentication is selected (RFC 4462 section 3). The srcName is from the
// results of the GSS-API authentication. The format is username@DOMAIN.
// GSSAPI just guarantees to the server who the user is, but not if they can log in, and with what permissions.
// This callback is called after the user identity is established with GSSAPI to decide if the user can login with
// which permissions. If the user is allowed to login, it should return a nil error.
AllowLogin func(conn ConnMetadata, srcName string) (*Permissions, error)
// Server must be set. It's the implementation
// of the GSSAPIServer interface. See GSSAPIServer interface for details.
Server GSSAPIServer
}
// ServerConfig holds server specific configuration data.
type ServerConfig struct {
// Config contains configuration shared between client and server.
@@ -99,6 +113,10 @@ type ServerConfig struct {
// BannerCallback, if present, is called and the return string is sent to
// the client after key exchange completed but before authentication.
BannerCallback func(conn ConnMetadata) string
// GSSAPIWithMICConfig includes gssapi server and callback, which if both non-nil, is used
// when gssapi-with-mic authentication is selected (RFC 4462 section 3).
GSSAPIWithMICConfig *GSSAPIWithMICConfig
}
// AddHostKey adds a private key as a host key. If an existing host
@@ -175,6 +193,12 @@ func NewServerConn(c net.Conn, config *ServerConfig) (*ServerConn, <-chan NewCha
if fullConf.MaxAuthTries == 0 {
fullConf.MaxAuthTries = 6
}
// Check if the config contains any unsupported key exchanges
for _, kex := range fullConf.KeyExchanges {
if _, ok := serverForbiddenKexAlgos[kex]; ok {
return nil, nil, nil, fmt.Errorf("ssh: unsupported key exchange %s for server", kex)
}
}
s := &connection{
sshConn: sshConn{conn: c},
@@ -204,7 +228,9 @@ func (s *connection) serverHandshake(config *ServerConfig) (*Permissions, error)
return nil, errors.New("ssh: server has no host keys")
}
if !config.NoClientAuth && config.PasswordCallback == nil && config.PublicKeyCallback == nil && config.KeyboardInteractiveCallback == nil {
if !config.NoClientAuth && config.PasswordCallback == nil && config.PublicKeyCallback == nil &&
config.KeyboardInteractiveCallback == nil && (config.GSSAPIWithMICConfig == nil ||
config.GSSAPIWithMICConfig.AllowLogin == nil || config.GSSAPIWithMICConfig.Server == nil) {
return nil, errors.New("ssh: no authentication methods configured but NoClientAuth is also false")
}
@@ -258,8 +284,8 @@ func (s *connection) serverHandshake(config *ServerConfig) (*Permissions, error)
func isAcceptableAlgo(algo string) bool {
switch algo {
case KeyAlgoRSA, KeyAlgoDSA, KeyAlgoECDSA256, KeyAlgoECDSA384, KeyAlgoECDSA521, KeyAlgoED25519,
CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01, CertAlgoED25519v01:
case KeyAlgoRSA, KeyAlgoDSA, KeyAlgoECDSA256, KeyAlgoECDSA384, KeyAlgoECDSA521, KeyAlgoSKECDSA256, KeyAlgoED25519, KeyAlgoSKED25519,
CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01, CertAlgoSKECDSA256v01, CertAlgoED25519v01, CertAlgoSKED25519v01:
return true
}
return false
@@ -295,6 +321,55 @@ func checkSourceAddress(addr net.Addr, sourceAddrs string) error {
return fmt.Errorf("ssh: remote address %v is not allowed because of source-address restriction", addr)
}
func gssExchangeToken(gssapiConfig *GSSAPIWithMICConfig, firstToken []byte, s *connection,
sessionID []byte, userAuthReq userAuthRequestMsg) (authErr error, perms *Permissions, err error) {
gssAPIServer := gssapiConfig.Server
defer gssAPIServer.DeleteSecContext()
var srcName string
for {
var (
outToken []byte
needContinue bool
)
outToken, srcName, needContinue, err = gssAPIServer.AcceptSecContext(firstToken)
if err != nil {
return err, nil, nil
}
if len(outToken) != 0 {
if err := s.transport.writePacket(Marshal(&userAuthGSSAPIToken{
Token: outToken,
})); err != nil {
return nil, nil, err
}
}
if !needContinue {
break
}
packet, err := s.transport.readPacket()
if err != nil {
return nil, nil, err
}
userAuthGSSAPITokenReq := &userAuthGSSAPIToken{}
if err := Unmarshal(packet, userAuthGSSAPITokenReq); err != nil {
return nil, nil, err
}
}
packet, err := s.transport.readPacket()
if err != nil {
return nil, nil, err
}
userAuthGSSAPIMICReq := &userAuthGSSAPIMIC{}
if err := Unmarshal(packet, userAuthGSSAPIMICReq); err != nil {
return nil, nil, err
}
mic := buildMIC(string(sessionID), userAuthReq.User, userAuthReq.Service, userAuthReq.Method)
if err := gssAPIServer.VerifyMIC(mic, userAuthGSSAPIMICReq.MIC); err != nil {
return err, nil, nil
}
perms, authErr = gssapiConfig.AllowLogin(s, srcName)
return authErr, perms, nil
}
// ServerAuthError represents server authentication errors and is
// sometimes returned by NewServerConn. It appends any authentication
// errors that may occur, and is returned if all of the authentication
@@ -496,6 +571,49 @@ userAuthLoop:
authErr = candidate.result
perms = candidate.perms
}
case "gssapi-with-mic":
gssapiConfig := config.GSSAPIWithMICConfig
userAuthRequestGSSAPI, err := parseGSSAPIPayload(userAuthReq.Payload)
if err != nil {
return nil, parseError(msgUserAuthRequest)
}
// OpenSSH supports Kerberos V5 mechanism only for GSS-API authentication.
if userAuthRequestGSSAPI.N == 0 {
authErr = fmt.Errorf("ssh: Mechanism negotiation is not supported")
break
}
var i uint32
present := false
for i = 0; i < userAuthRequestGSSAPI.N; i++ {
if userAuthRequestGSSAPI.OIDS[i].Equal(krb5Mesh) {
present = true
break
}
}
if !present {
authErr = fmt.Errorf("ssh: GSSAPI authentication must use the Kerberos V5 mechanism")
break
}
// Initial server response, see RFC 4462 section 3.3.
if err := s.transport.writePacket(Marshal(&userAuthGSSAPIResponse{
SupportMech: krb5OID,
})); err != nil {
return nil, err
}
// Exchange token, see RFC 4462 section 3.4.
packet, err := s.transport.readPacket()
if err != nil {
return nil, err
}
userAuthGSSAPITokenReq := &userAuthGSSAPIToken{}
if err := Unmarshal(packet, userAuthGSSAPITokenReq); err != nil {
return nil, err
}
authErr, perms, err = gssExchangeToken(gssapiConfig, userAuthGSSAPITokenReq.Token, s, sessionID,
userAuthReq)
if err != nil {
return nil, err
}
default:
authErr = fmt.Errorf("ssh: unknown method %q", userAuthReq.Method)
}
@@ -522,6 +640,10 @@ userAuthLoop:
if config.KeyboardInteractiveCallback != nil {
failureMsg.Methods = append(failureMsg.Methods, "keyboard-interactive")
}
if config.GSSAPIWithMICConfig != nil && config.GSSAPIWithMICConfig.Server != nil &&
config.GSSAPIWithMICConfig.AllowLogin != nil {
failureMsg.Methods = append(failureMsg.Methods, "gssapi-with-mic")
}
if len(failureMsg.Methods) == 0 {
return nil, errors.New("ssh: no authentication methods configured but NoClientAuth is also false")

139
vendor/golang.org/x/crypto/ssh/ssh_gss.go generated vendored Normal file
View File

@@ -0,0 +1,139 @@
// Copyright 2011 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 ssh
import (
"encoding/asn1"
"errors"
)
var krb5OID []byte
func init() {
krb5OID, _ = asn1.Marshal(krb5Mesh)
}
// GSSAPIClient provides the API to plug-in GSSAPI authentication for client logins.
type GSSAPIClient interface {
// InitSecContext initiates the establishment of a security context for GSS-API between the
// ssh client and ssh server. Initially the token parameter should be specified as nil.
// The routine may return a outputToken which should be transferred to
// the ssh server, where the ssh server will present it to
// AcceptSecContext. If no token need be sent, InitSecContext will indicate this by setting
// needContinue to false. To complete the context
// establishment, one or more reply tokens may be required from the ssh
// server;if so, InitSecContext will return a needContinue which is true.
// In this case, InitSecContext should be called again when the
// reply token is received from the ssh server, passing the reply
// token to InitSecContext via the token parameters.
// See RFC 2743 section 2.2.1 and RFC 4462 section 3.4.
InitSecContext(target string, token []byte, isGSSDelegCreds bool) (outputToken []byte, needContinue bool, err error)
// GetMIC generates a cryptographic MIC for the SSH2 message, and places
// the MIC in a token for transfer to the ssh server.
// The contents of the MIC field are obtained by calling GSS_GetMIC()
// over the following, using the GSS-API context that was just
// established:
// string session identifier
// byte SSH_MSG_USERAUTH_REQUEST
// string user name
// string service
// string "gssapi-with-mic"
// See RFC 2743 section 2.3.1 and RFC 4462 3.5.
GetMIC(micFiled []byte) ([]byte, error)
// Whenever possible, it should be possible for
// DeleteSecContext() calls to be successfully processed even
// if other calls cannot succeed, thereby enabling context-related
// resources to be released.
// In addition to deleting established security contexts,
// gss_delete_sec_context must also be able to delete "half-built"
// security contexts resulting from an incomplete sequence of
// InitSecContext()/AcceptSecContext() calls.
// See RFC 2743 section 2.2.3.
DeleteSecContext() error
}
// GSSAPIServer provides the API to plug in GSSAPI authentication for server logins.
type GSSAPIServer interface {
// AcceptSecContext allows a remotely initiated security context between the application
// and a remote peer to be established by the ssh client. The routine may return a
// outputToken which should be transferred to the ssh client,
// where the ssh client will present it to InitSecContext.
// If no token need be sent, AcceptSecContext will indicate this
// by setting the needContinue to false. To
// complete the context establishment, one or more reply tokens may be
// required from the ssh client. if so, AcceptSecContext
// will return a needContinue which is true, in which case it
// should be called again when the reply token is received from the ssh
// client, passing the token to AcceptSecContext via the
// token parameters.
// The srcName return value is the authenticated username.
// See RFC 2743 section 2.2.2 and RFC 4462 section 3.4.
AcceptSecContext(token []byte) (outputToken []byte, srcName string, needContinue bool, err error)
// VerifyMIC verifies that a cryptographic MIC, contained in the token parameter,
// fits the supplied message is received from the ssh client.
// See RFC 2743 section 2.3.2.
VerifyMIC(micField []byte, micToken []byte) error
// Whenever possible, it should be possible for
// DeleteSecContext() calls to be successfully processed even
// if other calls cannot succeed, thereby enabling context-related
// resources to be released.
// In addition to deleting established security contexts,
// gss_delete_sec_context must also be able to delete "half-built"
// security contexts resulting from an incomplete sequence of
// InitSecContext()/AcceptSecContext() calls.
// See RFC 2743 section 2.2.3.
DeleteSecContext() error
}
var (
// OpenSSH supports Kerberos V5 mechanism only for GSS-API authentication,
// so we also support the krb5 mechanism only.
// See RFC 1964 section 1.
krb5Mesh = asn1.ObjectIdentifier{1, 2, 840, 113554, 1, 2, 2}
)
// The GSS-API authentication method is initiated when the client sends an SSH_MSG_USERAUTH_REQUEST
// See RFC 4462 section 3.2.
type userAuthRequestGSSAPI struct {
N uint32
OIDS []asn1.ObjectIdentifier
}
func parseGSSAPIPayload(payload []byte) (*userAuthRequestGSSAPI, error) {
n, rest, ok := parseUint32(payload)
if !ok {
return nil, errors.New("parse uint32 failed")
}
s := &userAuthRequestGSSAPI{
N: n,
OIDS: make([]asn1.ObjectIdentifier, n),
}
for i := 0; i < int(n); i++ {
var (
desiredMech []byte
err error
)
desiredMech, rest, ok = parseString(rest)
if !ok {
return nil, errors.New("parse string failed")
}
if rest, err = asn1.Unmarshal(desiredMech, &s.OIDS[i]); err != nil {
return nil, err
}
}
return s, nil
}
// See RFC 4462 section 3.6.
func buildMIC(sessionID string, username string, service string, authMethod string) []byte {
out := make([]byte, 0, 0)
out = appendString(out, sessionID)
out = append(out, msgUserAuthRequest)
out = appendString(out, username)
out = appendString(out, service)
out = appendString(out, authMethod)
return out
}

88
vendor/golang.org/x/crypto/ssh/terminal/terminal.go generated vendored
View File

@@ -7,6 +7,8 @@ package terminal
import (
"bytes"
"io"
"runtime"
"strconv"
"sync"
"unicode/utf8"
)
@@ -111,6 +113,7 @@ func NewTerminal(c io.ReadWriter, prompt string) *Terminal {
}
const (
keyCtrlC = 3
keyCtrlD = 4
keyCtrlU = 21
keyEnter = '\r'
@@ -149,8 +152,12 @@ func bytesToKey(b []byte, pasteActive bool) (rune, []byte) {
switch b[0] {
case 1: // ^A
return keyHome, b[1:]
case 2: // ^B
return keyLeft, b[1:]
case 5: // ^E
return keyEnd, b[1:]
case 6: // ^F
return keyRight, b[1:]
case 8: // ^H
return keyBackspace, b[1:]
case 11: // ^K
@@ -271,34 +278,44 @@ func (t *Terminal) moveCursorToPos(pos int) {
}
func (t *Terminal) move(up, down, left, right int) {
movement := make([]rune, 3*(up+down+left+right))
m := movement
for i := 0; i < up; i++ {
m[0] = keyEscape
m[1] = '['
m[2] = 'A'
m = m[3:]
}
for i := 0; i < down; i++ {
m[0] = keyEscape
m[1] = '['
m[2] = 'B'
m = m[3:]
}
for i := 0; i < left; i++ {
m[0] = keyEscape
m[1] = '['
m[2] = 'D'
m = m[3:]
}
for i := 0; i < right; i++ {
m[0] = keyEscape
m[1] = '['
m[2] = 'C'
m = m[3:]
m := []rune{}
// 1 unit up can be expressed as ^[[A or ^[A
// 5 units up can be expressed as ^[[5A
if up == 1 {
m = append(m, keyEscape, '[', 'A')
} else if up > 1 {
m = append(m, keyEscape, '[')
m = append(m, []rune(strconv.Itoa(up))...)
m = append(m, 'A')
}
t.queue(movement)
if down == 1 {
m = append(m, keyEscape, '[', 'B')
} else if down > 1 {
m = append(m, keyEscape, '[')
m = append(m, []rune(strconv.Itoa(down))...)
m = append(m, 'B')
}
if right == 1 {
m = append(m, keyEscape, '[', 'C')
} else if right > 1 {
m = append(m, keyEscape, '[')
m = append(m, []rune(strconv.Itoa(right))...)
m = append(m, 'C')
}
if left == 1 {
m = append(m, keyEscape, '[', 'D')
} else if left > 1 {
m = append(m, keyEscape, '[')
m = append(m, []rune(strconv.Itoa(left))...)
m = append(m, 'D')
}
t.queue(m)
}
func (t *Terminal) clearLineToRight() {
@@ -726,6 +743,9 @@ func (t *Terminal) readLine() (line string, err error) {
return "", io.EOF
}
}
if key == keyCtrlC {
return "", io.EOF
}
if key == keyPasteStart {
t.pasteActive = true
if len(t.line) == 0 {
@@ -928,6 +948,8 @@ func (s *stRingBuffer) NthPreviousEntry(n int) (value string, ok bool) {
// readPasswordLine reads from reader until it finds \n or io.EOF.
// The slice returned does not include the \n.
// readPasswordLine also ignores any \r it finds.
// Windows uses \r as end of line. So, on Windows, readPasswordLine
// reads until it finds \r and ignores any \n it finds during processing.
func readPasswordLine(reader io.Reader) ([]byte, error) {
var buf [1]byte
var ret []byte
@@ -936,10 +958,20 @@ func readPasswordLine(reader io.Reader) ([]byte, error) {
n, err := reader.Read(buf[:])
if n > 0 {
switch buf[0] {
case '\b':
if len(ret) > 0 {
ret = ret[:len(ret)-1]
}
case '\n':
return ret, nil
if runtime.GOOS != "windows" {
return ret, nil
}
// otherwise ignore \n
case '\r':
// remove \r from passwords on Windows
if runtime.GOOS == "windows" {
return ret, nil
}
// otherwise ignore \r
default:
ret = append(ret, buf[0])
}

4
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go generated vendored
View File

@@ -85,8 +85,8 @@ func ReadPassword(fd int) ([]byte, error) {
}
old := st
st &^= (windows.ENABLE_ECHO_INPUT)
st |= (windows.ENABLE_PROCESSED_INPUT | windows.ENABLE_LINE_INPUT | windows.ENABLE_PROCESSED_OUTPUT)
st &^= (windows.ENABLE_ECHO_INPUT | windows.ENABLE_LINE_INPUT)
st |= (windows.ENABLE_PROCESSED_OUTPUT | windows.ENABLE_PROCESSED_INPUT)
if err := windows.SetConsoleMode(windows.Handle(fd), st); err != nil {
return nil, err
}

12
vendor/golang.org/x/crypto/ssh/transport.go generated vendored
View File

@@ -53,14 +53,14 @@ type transport struct {
// packetCipher represents a combination of SSH encryption/MAC
// protocol. A single instance should be used for one direction only.
type packetCipher interface {
// writePacket encrypts the packet and writes it to w. The
// writeCipherPacket encrypts the packet and writes it to w. The
// contents of the packet are generally scrambled.
writePacket(seqnum uint32, w io.Writer, rand io.Reader, packet []byte) error
writeCipherPacket(seqnum uint32, w io.Writer, rand io.Reader, packet []byte) error
// readPacket reads and decrypts a packet of data. The
// readCipherPacket reads and decrypts a packet of data. The
// returned packet may be overwritten by future calls of
// readPacket.
readPacket(seqnum uint32, r io.Reader) ([]byte, error)
readCipherPacket(seqnum uint32, r io.Reader) ([]byte, error)
}
// connectionState represents one side (read or write) of the
@@ -127,7 +127,7 @@ func (t *transport) readPacket() (p []byte, err error) {
}
func (s *connectionState) readPacket(r *bufio.Reader) ([]byte, error) {
packet, err := s.packetCipher.readPacket(s.seqNum, r)
packet, err := s.packetCipher.readCipherPacket(s.seqNum, r)
s.seqNum++
if err == nil && len(packet) == 0 {
err = errors.New("ssh: zero length packet")
@@ -175,7 +175,7 @@ func (t *transport) writePacket(packet []byte) error {
func (s *connectionState) writePacket(w *bufio.Writer, rand io.Reader, packet []byte) error {
changeKeys := len(packet) > 0 && packet[0] == msgNewKeys
err := s.packetCipher.writePacket(s.seqNum, w, rand, packet)
err := s.packetCipher.writeCipherPacket(s.seqNum, w, rand, packet)
if err != nil {
return err
}