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Merge pull request #24841 from rafalpotempa/upgrade-crypto 

Security: Upgrade version of golang.org/x/crypto to latest
This commit is contained in:
Alisdair McDiarmid 2020-05-13 09:19:36 -04:00 committed by GitHub
parent 6cf3f76623 2646e42ac9
commit 9a5e5bb5fc
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
33 changed files with 973 additions and 1844 deletions
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2
go.mod
View File

@ -126,7 +126,7 @@ require (
go.uber.org/atomic v1.3.2 // indirect go.uber.org/atomic v1.3.2 // indirect
go.uber.org/multierr v1.1.0 // indirect go.uber.org/multierr v1.1.0 // indirect
go.uber.org/zap v1.9.1 // indirect go.uber.org/zap v1.9.1 // indirect
golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37
golang.org/x/mod v0.2.0 golang.org/x/mod v0.2.0
golang.org/x/net v0.0.0-20200202094626-16171245cfb2 golang.org/x/net v0.0.0-20200202094626-16171245cfb2
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45

2
go.sum
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@ -464,6 +464,8 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 h1:ObdrDkeb4kJdCP557AjRjq
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e h1:egKlR8l7Nu9vHGWbcUV8lqR4987UfUbBd7GbhqGzNYU= golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e h1:egKlR8l7Nu9vHGWbcUV8lqR4987UfUbBd7GbhqGzNYU=
golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37 h1:cg5LA/zNPRzIXIWSCxQW10Rvpy94aQh3LT/ShoCpkHw=
golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8= golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js= golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=

3
vendor/golang.org/x/crypto/chacha20/chacha_arm64.go generated vendored
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@ -2,8 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build go1.11 // +build go1.11,!gccgo,!purego
// +build !gccgo,!appengine
package chacha20 package chacha20

3
vendor/golang.org/x/crypto/chacha20/chacha_arm64.s generated vendored
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@ -2,8 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build go1.11 // +build go1.11,!gccgo,!purego
// +build !gccgo,!appengine
#include "textflag.h" #include "textflag.h"

140
vendor/golang.org/x/crypto/chacha20/chacha_generic.go generated vendored
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@ -42,10 +42,14 @@ type Cipher struct {
// The last len bytes of buf are leftover key stream bytes from the previous // 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 // XORKeyStream invocation. The size of buf depends on how many blocks are
// computed at a time. // computed at a time by xorKeyStreamBlocks.
buf [bufSize]byte buf [bufSize]byte
len int 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 // The counter-independent results of the first round are cached after they
// are computed the first time. // are computed the first time.
precompDone bool precompDone bool
@ -89,6 +93,7 @@ func newUnauthenticatedCipher(c *Cipher, key, nonce []byte) (*Cipher, error) {
return nil, errors.New("chacha20: wrong nonce size") return nil, errors.New("chacha20: wrong nonce size")
} }
key, nonce = key[:KeySize], nonce[:NonceSize] // bounds check elimination hint
c.key = [8]uint32{ c.key = [8]uint32{
binary.LittleEndian.Uint32(key[0:4]), binary.LittleEndian.Uint32(key[0:4]),
binary.LittleEndian.Uint32(key[4:8]), binary.LittleEndian.Uint32(key[4:8]),
@ -136,6 +141,36 @@ func quarterRound(a, b, c, d uint32) (uint32, uint32, uint32, uint32) {
return a, b, c, d 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 // 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. // cipher's key stream. Dst and src must overlap entirely or not at all.
// //
@ -169,34 +204,52 @@ func (s *Cipher) XORKeyStream(dst, src []byte) {
dst[i] = src[i] ^ b dst[i] = src[i] ^ b
} }
s.len -= len(keyStream) s.len -= len(keyStream)
src = src[len(keyStream):] dst, src = dst[len(keyStream):], src[len(keyStream):]
dst = dst[len(keyStream):] }
if len(src) == 0 {
return
} }
const blocksPerBuf = bufSize / blockSize // If we'd need to let the counter overflow and keep generating output,
numBufs := (uint64(len(src)) + bufSize - 1) / bufSize // panic immediately. If instead we'd only reach the last block, remember
if uint64(s.counter)+numBufs*blocksPerBuf >= 1<<32 { // 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") panic("chacha20: counter overflow")
} else if uint64(s.counter)+numBlocks == 1<<32 {
s.overflow = true
} }
// xorKeyStreamBlocks implementations expect input lengths that are a // xorKeyStreamBlocks implementations expect input lengths that are a
// multiple of bufSize. Platform-specific ones process multiple blocks at a // multiple of bufSize. Platform-specific ones process multiple blocks at a
// time, so have bufSizes that are a multiple of blockSize. // time, so have bufSizes that are a multiple of blockSize.
rem := len(src) % bufSize full := len(src) - len(src)%bufSize
full := len(src) - rem
if full > 0 { if full > 0 {
s.xorKeyStreamBlocks(dst[:full], src[:full]) 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 // If we have a partial (multi-)block, pad it for xorKeyStreamBlocks, and
// keep the leftover keystream for the next XORKeyStream invocation. // keep the leftover keystream for the next XORKeyStream invocation.
if rem > 0 { if len(src) > 0 {
s.buf = [bufSize]byte{} s.buf = [bufSize]byte{}
copy(s.buf[:], src[full:]) copy(s.buf[:], src)
s.xorKeyStreamBlocks(s.buf[:], s.buf[:]) s.xorKeyStreamBlocks(s.buf[:], s.buf[:])
s.len = bufSize - copy(dst[full:], s.buf[:]) s.len = bufSize - copy(dst, s.buf[:])
} }
} }
@ -233,7 +286,9 @@ func (s *Cipher) xorKeyStreamBlocksGeneric(dst, src []byte) {
s.precompDone = true s.precompDone = true
} }
for i := 0; i < len(src); i += blockSize { // 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. // The remainder of the first column round.
fcr0, fcr4, fcr8, fcr12 := quarterRound(c0, c4, c8, s.counter) fcr0, fcr4, fcr8, fcr12 := quarterRound(c0, c4, c8, s.counter)
@ -258,49 +313,28 @@ func (s *Cipher) xorKeyStreamBlocksGeneric(dst, src []byte) {
x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14) x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14)
} }
// Finally, add back the initial state to generate the key stream. // Add back the initial state to generate the key stream, then
x0 += c0 // XOR the key stream with the source and write out the result.
x1 += c1 addXor(dst[0:4], src[0:4], x0, c0)
x2 += c2 addXor(dst[4:8], src[4:8], x1, c1)
x3 += c3 addXor(dst[8:12], src[8:12], x2, c2)
x4 += c4 addXor(dst[12:16], src[12:16], x3, c3)
x5 += c5 addXor(dst[16:20], src[16:20], x4, c4)
x6 += c6 addXor(dst[20:24], src[20:24], x5, c5)
x7 += c7 addXor(dst[24:28], src[24:28], x6, c6)
x8 += c8 addXor(dst[28:32], src[28:32], x7, c7)
x9 += c9 addXor(dst[32:36], src[32:36], x8, c8)
x10 += c10 addXor(dst[36:40], src[36:40], x9, c9)
x11 += c11 addXor(dst[40:44], src[40:44], x10, c10)
x12 += s.counter addXor(dst[44:48], src[44:48], x11, c11)
x13 += c13 addXor(dst[48:52], src[48:52], x12, s.counter)
x14 += c14 addXor(dst[52:56], src[52:56], x13, c13)
x15 += c15 addXor(dst[56:60], src[56:60], x14, c14)
addXor(dst[60:64], src[60:64], x15, c15)
s.counter += 1 s.counter += 1
if s.counter == 0 {
panic("chacha20: internal error: counter overflow")
}
in, out := src[i:], dst[i:] src, dst = src[blockSize:], dst[blockSize:]
in, out = in[:blockSize], out[:blockSize] // bounds check elimination hint
// XOR the key stream with the source and write out the result.
xor(out[0:], in[0:], x0)
xor(out[4:], in[4:], x1)
xor(out[8:], in[8:], x2)
xor(out[12:], in[12:], x3)
xor(out[16:], in[16:], x4)
xor(out[20:], in[20:], x5)
xor(out[24:], in[24:], x6)
xor(out[28:], in[28:], x7)
xor(out[32:], in[32:], x8)
xor(out[36:], in[36:], x9)
xor(out[40:], in[40:], x10)
xor(out[44:], in[44:], x11)
xor(out[48:], in[48:], x12)
xor(out[52:], in[52:], x13)
xor(out[56:], in[56:], x14)
xor(out[60:], in[60:], x15)
} }
} }

2
vendor/golang.org/x/crypto/chacha20/chacha_noasm.go generated vendored
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build !arm64,!s390x,!ppc64le arm64,!go1.11 gccgo appengine // +build !arm64,!s390x,!ppc64le arm64,!go1.11 gccgo purego
package chacha20 package chacha20

2
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.go generated vendored
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build !gccgo,!appengine // +build !gccgo,!purego
package chacha20 package chacha20

2
vendor/golang.org/x/crypto/chacha20/chacha_ppc64le.s generated vendored
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@ -19,7 +19,7 @@
// The differences in this and the original implementation are // The differences in this and the original implementation are
// due to the calling conventions and initialization of constants. // due to the calling conventions and initialization of constants.
// +build !gccgo,!appengine // +build !gccgo,!purego
#include "textflag.h" #include "textflag.h"

2
vendor/golang.org/x/crypto/chacha20/chacha_s390x.go generated vendored
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build !gccgo,!appengine // +build !gccgo,!purego
package chacha20 package chacha20

2
vendor/golang.org/x/crypto/chacha20/chacha_s390x.s generated vendored
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build !gccgo,!appengine // +build !gccgo,!purego
#include "go_asm.h" #include "go_asm.h"
#include "textflag.h" #include "textflag.h"

17
vendor/golang.org/x/crypto/chacha20/xor.go generated vendored
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@ -13,10 +13,10 @@ const unaligned = runtime.GOARCH == "386" ||
runtime.GOARCH == "ppc64le" || runtime.GOARCH == "ppc64le" ||
runtime.GOARCH == "s390x" 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. // places the result in little endian byte order in dst.
func xor(dst, src []byte, u uint32) { func addXor(dst, src []byte, a, b uint32) {
_, _ = src[3], dst[3] // eliminate bounds checks _, _ = src[3], dst[3] // bounds check elimination hint
if unaligned { if unaligned {
// The compiler should optimize this code into // The compiler should optimize this code into
// 32-bit unaligned little endian loads and stores. // 32-bit unaligned little endian loads and stores.
@ -27,15 +27,16 @@ func xor(dst, src []byte, u uint32) {
v |= uint32(src[1]) << 8 v |= uint32(src[1]) << 8
v |= uint32(src[2]) << 16 v |= uint32(src[2]) << 16
v |= uint32(src[3]) << 24 v |= uint32(src[3]) << 24
v ^= u v ^= a + b
dst[0] = byte(v) dst[0] = byte(v)
dst[1] = byte(v >> 8) dst[1] = byte(v >> 8)
dst[2] = byte(v >> 16) dst[2] = byte(v >> 16)
dst[3] = byte(v >> 24) dst[3] = byte(v >> 24)
} else { } else {
dst[0] = src[0] ^ byte(u) a += b
dst[1] = src[1] ^ byte(u>>8) dst[0] = src[0] ^ byte(a)
dst[2] = src[2] ^ byte(u>>16) dst[1] = src[1] ^ byte(a>>8)
dst[3] = src[3] ^ byte(u>>24) dst[2] = src[2] ^ byte(a>>16)
dst[3] = src[3] ^ byte(a>>24)
} }
} }

11
vendor/golang.org/x/crypto/openpgp/armor/armor.go generated vendored
View File

@ -66,6 +66,7 @@ type lineReader struct {
buf []byte buf []byte
eof bool eof bool
crc uint32 crc uint32
crcSet bool
} }
func (l *lineReader) Read(p []byte) (n int, err error) { 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 return 0, ArmorCorrupt
} }
if bytes.HasPrefix(line, armorEnd) {
l.eof = true
return 0, io.EOF
}
if len(line) == 5 && line[0] == '=' { if len(line) == 5 && line[0] == '=' {
// This is the checksum line // This is the checksum line
var expectedBytes [3]byte var expectedBytes [3]byte
@ -108,6 +114,7 @@ func (l *lineReader) Read(p []byte) (n int, err error) {
} }
l.eof = true l.eof = true
l.crcSet = true
return 0, io.EOF return 0, io.EOF
} }
@ -141,11 +148,9 @@ func (r *openpgpReader) Read(p []byte) (n int, err error) {
n, err = r.b64Reader.Read(p) n, err = r.b64Reader.Read(p)
r.currentCRC = crc24(r.currentCRC, p[:n]) r.currentCRC = crc24(r.currentCRC, p[:n])
if err == io.EOF { if err == io.EOF && r.lReader.crcSet && r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
if r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
return 0, ArmorCorrupt return 0, ArmorCorrupt
} }
}
return return
} }

59
vendor/golang.org/x/crypto/openpgp/packet/packet.go generated vendored
View File

@ -14,6 +14,7 @@ import (
"crypto/rsa" "crypto/rsa"
"io" "io"
"math/big" "math/big"
"math/bits"
"golang.org/x/crypto/cast5" "golang.org/x/crypto/cast5"
"golang.org/x/crypto/openpgp/errors" "golang.org/x/crypto/openpgp/errors"
@ -100,33 +101,65 @@ func (r *partialLengthReader) Read(p []byte) (n int, err error) {
type partialLengthWriter struct { type partialLengthWriter struct {
w io.WriteCloser w io.WriteCloser
lengthByte [1]byte 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) { func (w *partialLengthWriter) Write(p []byte) (n int, err error) {
for len(p) > 0 { off := 0
for power := uint(14); power < 32; power-- { if !w.sentFirst {
l := 1 << power if len(w.buf) > 0 || len(p) < minFirstPartialWrite {
if len(p) >= l { off = len(w.buf)
w.lengthByte[0] = 224 + uint8(power) w.buf = append(w.buf, p...)
_, err = w.w.Write(w.lengthByte[:]) if len(w.buf) < minFirstPartialWrite {
if err != nil { return len(p), nil
return
} }
p = w.buf
w.buf = nil
}
w.sentFirst = true
}
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 var m int
m, err = w.w.Write(p[:l]) m, err = w.w.Write(p[:l])
n += m n += m
}
if err != nil { if err != nil {
return if n < off {
return 0, err
}
return n - off, err
} }
p = p[l:] p = p[l:]
break
} }
} return n - off, nil
}
return
} }
func (w *partialLengthWriter) Close() error { 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 w.lengthByte[0] = 0
_, err := w.w.Write(w.lengthByte[:]) _, err := w.w.Write(w.lengthByte[:])
if err != nil { if err != nil {

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

26
vendor/golang.org/x/crypto/poly1305/poly1305.go generated vendored
View File

@ -26,7 +26,9 @@ const TagSize = 16
// 16-byte result into out. Authenticating two different messages with the same // 16-byte result into out. Authenticating two different messages with the same
// key allows an attacker to forge messages at will. // key allows an attacker to forge messages at will.
func Sum(out *[16]byte, m []byte, key *[32]byte) { func Sum(out *[16]byte, m []byte, key *[32]byte) {
sum(out, m, key) 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. // Verify returns true if mac is a valid authenticator for m with the given key.
@ -46,10 +48,9 @@ func Verify(mac *[16]byte, m []byte, key *[32]byte) bool {
// two different messages with the same key allows an attacker // two different messages with the same key allows an attacker
// to forge messages at will. // to forge messages at will.
func New(key *[32]byte) *MAC { func New(key *[32]byte) *MAC {
return &MAC{ m := &MAC{}
mac: newMAC(key), initialize(key, &m.macState)
finalized: false, return m
}
} }
// MAC is an io.Writer computing an authentication tag // MAC is an io.Writer computing an authentication tag
@ -58,7 +59,7 @@ func New(key *[32]byte) *MAC {
// MAC cannot be used like common hash.Hash implementations, // MAC cannot be used like common hash.Hash implementations,
// because using a poly1305 key twice breaks its security. // because using a poly1305 key twice breaks its security.
// Therefore writing data to a running MAC after calling // Therefore writing data to a running MAC after calling
// Sum causes it to panic. // Sum or Verify causes it to panic.
type MAC struct { type MAC struct {
mac // platform-dependent implementation mac // platform-dependent implementation
@ -71,10 +72,10 @@ func (h *MAC) Size() int { return TagSize }
// Write adds more data to the running message authentication code. // Write adds more data to the running message authentication code.
// It never returns an error. // 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) { func (h *MAC) Write(p []byte) (n int, err error) {
if h.finalized { if h.finalized {
panic("poly1305: write to MAC after Sum") panic("poly1305: write to MAC after Sum or Verify")
} }
return h.mac.Write(p) return h.mac.Write(p)
} }
@ -87,3 +88,12 @@ func (h *MAC) Sum(b []byte) []byte {
h.finalized = true h.finalized = true
return append(b, mac[:]...) 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
}

13
vendor/golang.org/x/crypto/poly1305/sum_amd64.go generated vendored
View File

@ -2,24 +2,13 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine // +build !gccgo,!purego
package poly1305 package poly1305
//go:noescape //go:noescape
func update(state *macState, msg []byte) func update(state *macState, msg []byte)
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(key, &h.r, &h.s)
return
}
// mac is a wrapper for macGeneric that redirects calls that would have gone to // mac is a wrapper for macGeneric that redirects calls that would have gone to
// updateGeneric to update. // updateGeneric to update.
// //

2
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 // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build amd64,!gccgo,!appengine // +build !gccgo,!purego
#include "textflag.h" #include "textflag.h"

19
vendor/golang.org/x/crypto/poly1305/sum_arm.go generated vendored
View File

@ -1,19 +0,0 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build arm,!gccgo,!appengine,!nacl
package poly1305
// poly1305_auth_armv6 is implemented in sum_arm.s
//go:noescape
func poly1305_auth_armv6(out *[16]byte, m *byte, mlen uint32, key *[32]byte)
func sum(out *[16]byte, m []byte, key *[32]byte) {
var mPtr *byte
if len(m) > 0 {
mPtr = &m[0]
}
poly1305_auth_armv6(out, mPtr, uint32(len(m)), key)
}

427
vendor/golang.org/x/crypto/poly1305/sum_arm.s generated vendored
View File

@ -1,427 +0,0 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build arm,!gccgo,!appengine,!nacl
#include "textflag.h"
// This code was translated into a form compatible with 5a from the public
// domain source by Andrew Moon: github.com/floodyberry/poly1305-opt/blob/master/app/extensions/poly1305.
DATA ·poly1305_init_constants_armv6<>+0x00(SB)/4, $0x3ffffff
DATA ·poly1305_init_constants_armv6<>+0x04(SB)/4, $0x3ffff03
DATA ·poly1305_init_constants_armv6<>+0x08(SB)/4, $0x3ffc0ff
DATA ·poly1305_init_constants_armv6<>+0x0c(SB)/4, $0x3f03fff
DATA ·poly1305_init_constants_armv6<>+0x10(SB)/4, $0x00fffff
GLOBL ·poly1305_init_constants_armv6<>(SB), 8, $20
// Warning: the linker may use R11 to synthesize certain instructions. Please
// take care and verify that no synthetic instructions use it.
TEXT poly1305_init_ext_armv6<>(SB), NOSPLIT, $0
// Needs 16 bytes of stack and 64 bytes of space pointed to by R0. (It
// might look like it's only 60 bytes of space but the final four bytes
// will be written by another function.) We need to skip over four
// bytes of stack because that's saving the value of 'g'.
ADD $4, R13, R8
MOVM.IB [R4-R7], (R8)
MOVM.IA.W (R1), [R2-R5]
MOVW $·poly1305_init_constants_armv6<>(SB), R7
MOVW R2, R8
MOVW R2>>26, R9
MOVW R3>>20, g
MOVW R4>>14, R11
MOVW R5>>8, R12
ORR R3<<6, R9, R9
ORR R4<<12, g, g
ORR R5<<18, R11, R11
MOVM.IA (R7), [R2-R6]
AND R8, R2, R2
AND R9, R3, R3
AND g, R4, R4
AND R11, R5, R5
AND R12, R6, R6
MOVM.IA.W [R2-R6], (R0)
EOR R2, R2, R2
EOR R3, R3, R3
EOR R4, R4, R4
EOR R5, R5, R5
EOR R6, R6, R6
MOVM.IA.W [R2-R6], (R0)
MOVM.IA.W (R1), [R2-R5]
MOVM.IA [R2-R6], (R0)
ADD $20, R13, R0
MOVM.DA (R0), [R4-R7]
RET
#define MOVW_UNALIGNED(Rsrc, Rdst, Rtmp, offset) \
MOVBU (offset+0)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+0)(Rdst); \
MOVBU (offset+1)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+1)(Rdst); \
MOVBU (offset+2)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+2)(Rdst); \
MOVBU (offset+3)(Rsrc), Rtmp; \
MOVBU Rtmp, (offset+3)(Rdst)
TEXT poly1305_blocks_armv6<>(SB), NOSPLIT, $0
// Needs 24 bytes of stack for saved registers and then 88 bytes of
// scratch space after that. We assume that 24 bytes at (R13) have
// already been used: four bytes for the link register saved in the
// prelude of poly1305_auth_armv6, four bytes for saving the value of g
// in that function and 16 bytes of scratch space used around
// poly1305_finish_ext_armv6_skip1.
ADD $24, R13, R12
MOVM.IB [R4-R8, R14], (R12)
MOVW R0, 88(R13)
MOVW R1, 92(R13)
MOVW R2, 96(R13)
MOVW R1, R14
MOVW R2, R12
MOVW 56(R0), R8
WORD $0xe1180008 // TST R8, R8 not working see issue 5921
EOR R6, R6, R6
MOVW.EQ $(1<<24), R6
MOVW R6, 84(R13)
ADD $116, R13, g
MOVM.IA (R0), [R0-R9]
MOVM.IA [R0-R4], (g)
CMP $16, R12
BLO poly1305_blocks_armv6_done
poly1305_blocks_armv6_mainloop:
WORD $0xe31e0003 // TST R14, #3 not working see issue 5921
BEQ poly1305_blocks_armv6_mainloop_aligned
ADD $100, R13, g
MOVW_UNALIGNED(R14, g, R0, 0)
MOVW_UNALIGNED(R14, g, R0, 4)
MOVW_UNALIGNED(R14, g, R0, 8)
MOVW_UNALIGNED(R14, g, R0, 12)
MOVM.IA (g), [R0-R3]
ADD $16, R14
B poly1305_blocks_armv6_mainloop_loaded
poly1305_blocks_armv6_mainloop_aligned:
MOVM.IA.W (R14), [R0-R3]
poly1305_blocks_armv6_mainloop_loaded:
MOVW R0>>26, g
MOVW R1>>20, R11
MOVW R2>>14, R12
MOVW R14, 92(R13)
MOVW R3>>8, R4
ORR R1<<6, g, g
ORR R2<<12, R11, R11
ORR R3<<18, R12, R12
BIC $0xfc000000, R0, R0
BIC $0xfc000000, g, g
MOVW 84(R13), R3
BIC $0xfc000000, R11, R11
BIC $0xfc000000, R12, R12
ADD R0, R5, R5
ADD g, R6, R6
ORR R3, R4, R4
ADD R11, R7, R7
ADD $116, R13, R14
ADD R12, R8, R8
ADD R4, R9, R9
MOVM.IA (R14), [R0-R4]
MULLU R4, R5, (R11, g)
MULLU R3, R5, (R14, R12)
MULALU R3, R6, (R11, g)
MULALU R2, R6, (R14, R12)
MULALU R2, R7, (R11, g)
MULALU R1, R7, (R14, R12)
ADD R4<<2, R4, R4
ADD R3<<2, R3, R3
MULALU R1, R8, (R11, g)
MULALU R0, R8, (R14, R12)
MULALU R0, R9, (R11, g)
MULALU R4, R9, (R14, R12)
MOVW g, 76(R13)
MOVW R11, 80(R13)
MOVW R12, 68(R13)
MOVW R14, 72(R13)
MULLU R2, R5, (R11, g)
MULLU R1, R5, (R14, R12)
MULALU R1, R6, (R11, g)
MULALU R0, R6, (R14, R12)
MULALU R0, R7, (R11, g)
MULALU R4, R7, (R14, R12)
ADD R2<<2, R2, R2
ADD R1<<2, R1, R1
MULALU R4, R8, (R11, g)
MULALU R3, R8, (R14, R12)
MULALU R3, R9, (R11, g)
MULALU R2, R9, (R14, R12)
MOVW g, 60(R13)
MOVW R11, 64(R13)
MOVW R12, 52(R13)
MOVW R14, 56(R13)
MULLU R0, R5, (R11, g)
MULALU R4, R6, (R11, g)
MULALU R3, R7, (R11, g)
MULALU R2, R8, (R11, g)
MULALU R1, R9, (R11, g)
ADD $52, R13, R0
MOVM.IA (R0), [R0-R7]
MOVW g>>26, R12
MOVW R4>>26, R14
ORR R11<<6, R12, R12
ORR R5<<6, R14, R14
BIC $0xfc000000, g, g
BIC $0xfc000000, R4, R4
ADD.S R12, R0, R0
ADC $0, R1, R1
ADD.S R14, R6, R6
ADC $0, R7, R7
MOVW R0>>26, R12
MOVW R6>>26, R14
ORR R1<<6, R12, R12
ORR R7<<6, R14, R14
BIC $0xfc000000, R0, R0
BIC $0xfc000000, R6, R6
ADD R14<<2, R14, R14
ADD.S R12, R2, R2
ADC $0, R3, R3
ADD R14, g, g
MOVW R2>>26, R12
MOVW g>>26, R14
ORR R3<<6, R12, R12
BIC $0xfc000000, g, R5
BIC $0xfc000000, R2, R7
ADD R12, R4, R4
ADD R14, R0, R0
MOVW R4>>26, R12
BIC $0xfc000000, R4, R8
ADD R12, R6, R9
MOVW 96(R13), R12
MOVW 92(R13), R14
MOVW R0, R6
CMP $32, R12
SUB $16, R12, R12
MOVW R12, 96(R13)
BHS poly1305_blocks_armv6_mainloop
poly1305_blocks_armv6_done:
MOVW 88(R13), R12
MOVW R5, 20(R12)
MOVW R6, 24(R12)
MOVW R7, 28(R12)
MOVW R8, 32(R12)
MOVW R9, 36(R12)
ADD $48, R13, R0
MOVM.DA (R0), [R4-R8, R14]
RET
#define MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp) \
MOVBU.P 1(Rsrc), Rtmp; \
MOVBU.P Rtmp, 1(Rdst); \
MOVBU.P 1(Rsrc), Rtmp; \
MOVBU.P Rtmp, 1(Rdst)
#define MOVWP_UNALIGNED(Rsrc, Rdst, Rtmp) \
MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp); \
MOVHUP_UNALIGNED(Rsrc, Rdst, Rtmp)
// func poly1305_auth_armv6(out *[16]byte, m *byte, mlen uint32, key *[32]key)
TEXT ·poly1305_auth_armv6(SB), $196-16
// The value 196, just above, is the sum of 64 (the size of the context
// structure) and 132 (the amount of stack needed).
//
// At this point, the stack pointer (R13) has been moved down. It
// points to the saved link register and there's 196 bytes of free
// space above it.
//
// The stack for this function looks like:
//
// +---------------------
// |
// | 64 bytes of context structure
// |
// +---------------------
// |
// | 112 bytes for poly1305_blocks_armv6
// |
// +---------------------
// | 16 bytes of final block, constructed at
// | poly1305_finish_ext_armv6_skip8
// +---------------------
// | four bytes of saved 'g'
// +---------------------
// | lr, saved by prelude <- R13 points here
// +---------------------
MOVW g, 4(R13)
MOVW out+0(FP), R4
MOVW m+4(FP), R5
MOVW mlen+8(FP), R6
MOVW key+12(FP), R7
ADD $136, R13, R0 // 136 = 4 + 4 + 16 + 112
MOVW R7, R1
// poly1305_init_ext_armv6 will write to the stack from R13+4, but
// that's ok because none of the other values have been written yet.
BL poly1305_init_ext_armv6<>(SB)
BIC.S $15, R6, R2
BEQ poly1305_auth_armv6_noblocks
ADD $136, R13, R0
MOVW R5, R1
ADD R2, R5, R5
SUB R2, R6, R6
BL poly1305_blocks_armv6<>(SB)
poly1305_auth_armv6_noblocks:
ADD $136, R13, R0
MOVW R5, R1
MOVW R6, R2
MOVW R4, R3
MOVW R0, R5
MOVW R1, R6
MOVW R2, R7
MOVW R3, R8
AND.S R2, R2, R2
BEQ poly1305_finish_ext_armv6_noremaining
EOR R0, R0
ADD $8, R13, R9 // 8 = offset to 16 byte scratch space
MOVW R0, (R9)
MOVW R0, 4(R9)
MOVW R0, 8(R9)
MOVW R0, 12(R9)
WORD $0xe3110003 // TST R1, #3 not working see issue 5921
BEQ poly1305_finish_ext_armv6_aligned
WORD $0xe3120008 // TST R2, #8 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip8
MOVWP_UNALIGNED(R1, R9, g)
MOVWP_UNALIGNED(R1, R9, g)
poly1305_finish_ext_armv6_skip8:
WORD $0xe3120004 // TST $4, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip4
MOVWP_UNALIGNED(R1, R9, g)
poly1305_finish_ext_armv6_skip4:
WORD $0xe3120002 // TST $2, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip2
MOVHUP_UNALIGNED(R1, R9, g)
B poly1305_finish_ext_armv6_skip2
poly1305_finish_ext_armv6_aligned:
WORD $0xe3120008 // TST R2, #8 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip8_aligned
MOVM.IA.W (R1), [g-R11]
MOVM.IA.W [g-R11], (R9)
poly1305_finish_ext_armv6_skip8_aligned:
WORD $0xe3120004 // TST $4, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip4_aligned
MOVW.P 4(R1), g
MOVW.P g, 4(R9)
poly1305_finish_ext_armv6_skip4_aligned:
WORD $0xe3120002 // TST $2, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip2
MOVHU.P 2(R1), g
MOVH.P g, 2(R9)
poly1305_finish_ext_armv6_skip2:
WORD $0xe3120001 // TST $1, R2 not working see issue 5921
BEQ poly1305_finish_ext_armv6_skip1
MOVBU.P 1(R1), g
MOVBU.P g, 1(R9)
poly1305_finish_ext_armv6_skip1:
MOVW $1, R11
MOVBU R11, 0(R9)
MOVW R11, 56(R5)
MOVW R5, R0
ADD $8, R13, R1
MOVW $16, R2
BL poly1305_blocks_armv6<>(SB)
poly1305_finish_ext_armv6_noremaining:
MOVW 20(R5), R0
MOVW 24(R5), R1
MOVW 28(R5), R2
MOVW 32(R5), R3
MOVW 36(R5), R4
MOVW R4>>26, R12
BIC $0xfc000000, R4, R4
ADD R12<<2, R12, R12
ADD R12, R0, R0
MOVW R0>>26, R12
BIC $0xfc000000, R0, R0
ADD R12, R1, R1
MOVW R1>>26, R12
BIC $0xfc000000, R1, R1
ADD R12, R2, R2
MOVW R2>>26, R12
BIC $0xfc000000, R2, R2
ADD R12, R3, R3
MOVW R3>>26, R12
BIC $0xfc000000, R3, R3
ADD R12, R4, R4
ADD $5, R0, R6
MOVW R6>>26, R12
BIC $0xfc000000, R6, R6
ADD R12, R1, R7
MOVW R7>>26, R12
BIC $0xfc000000, R7, R7
ADD R12, R2, g
MOVW g>>26, R12
BIC $0xfc000000, g, g
ADD R12, R3, R11
MOVW $-(1<<26), R12
ADD R11>>26, R12, R12
BIC $0xfc000000, R11, R11
ADD R12, R4, R9
MOVW R9>>31, R12
SUB $1, R12
AND R12, R6, R6
AND R12, R7, R7
AND R12, g, g
AND R12, R11, R11
AND R12, R9, R9
MVN R12, R12
AND R12, R0, R0
AND R12, R1, R1
AND R12, R2, R2
AND R12, R3, R3
AND R12, R4, R4
ORR R6, R0, R0
ORR R7, R1, R1
ORR g, R2, R2
ORR R11, R3, R3
ORR R9, R4, R4
ORR R1<<26, R0, R0
MOVW R1>>6, R1
ORR R2<<20, R1, R1
MOVW R2>>12, R2
ORR R3<<14, R2, R2
MOVW R3>>18, R3
ORR R4<<8, R3, R3
MOVW 40(R5), R6
MOVW 44(R5), R7
MOVW 48(R5), g
MOVW 52(R5), R11
ADD.S R6, R0, R0
ADC.S R7, R1, R1
ADC.S g, R2, R2
ADC.S R11, R3, R3
MOVM.IA [R0-R3], (R8)
MOVW R5, R12
EOR R0, R0, R0
EOR R1, R1, R1
EOR R2, R2, R2
EOR R3, R3, R3
EOR R4, R4, R4
EOR R5, R5, R5
EOR R6, R6, R6
EOR R7, R7, R7
MOVM.IA.W [R0-R7], (R12)
MOVM.IA [R0-R7], (R12)
MOVW 4(R13), g
RET

21
vendor/golang.org/x/crypto/poly1305/sum_generic.go generated vendored
View File

@ -31,16 +31,18 @@ func sumGeneric(out *[TagSize]byte, msg []byte, key *[32]byte) {
h.Sum(out) h.Sum(out)
} }
func newMACGeneric(key *[32]byte) (h macGeneric) { func newMACGeneric(key *[32]byte) macGeneric {
initialize(key, &h.r, &h.s) m := macGeneric{}
return initialize(key, &m.macState)
return m
} }
// macState holds numbers in saturated 64-bit little-endian limbs. That is, // 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. // the value of [x0, x1, x2] is x[0] + x[1] * 2⁶⁴ + x[2] * 2¹²⁸.
type macState struct { type macState struct {
// h is the main accumulator. It is to be interpreted modulo 2¹³⁰ - 5, but // h is the main accumulator. It is to be interpreted modulo 2¹³⁰ - 5, but
// can grow larger during and after rounds. // can grow larger during and after rounds. It must, however, remain below
// 2 * (2¹³⁰ - 5).
h [3]uint64 h [3]uint64
// r and s are the private key components. // r and s are the private key components.
r [2]uint64 r [2]uint64
@ -97,11 +99,12 @@ const (
rMask1 = 0x0FFFFFFC0FFFFFFC rMask1 = 0x0FFFFFFC0FFFFFFC
) )
func initialize(key *[32]byte, r, s *[2]uint64) { // initialize loads the 256-bit key into the two 128-bit secret values r and s.
r[0] = binary.LittleEndian.Uint64(key[0:8]) & rMask0 func initialize(key *[32]byte, m *macState) {
r[1] = binary.LittleEndian.Uint64(key[8:16]) & rMask1 m.r[0] = binary.LittleEndian.Uint64(key[0:8]) & rMask0
s[0] = binary.LittleEndian.Uint64(key[16:24]) m.r[1] = binary.LittleEndian.Uint64(key[8:16]) & rMask1
s[1] = binary.LittleEndian.Uint64(key[24:32]) m.s[0] = binary.LittleEndian.Uint64(key[16:24])
m.s[1] = binary.LittleEndian.Uint64(key[24:32])
} }
// uint128 holds a 128-bit number as two 64-bit limbs, for use with the // uint128 holds a 128-bit number as two 64-bit limbs, for use with the

13
vendor/golang.org/x/crypto/poly1305/sum_noasm.go generated vendored
View File

@ -1,13 +0,0 @@
// 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 s390x,!go1.11 !arm,!amd64,!s390x,!ppc64le gccgo appengine nacl
package poly1305
func sum(out *[TagSize]byte, msg []byte, key *[32]byte) {
h := newMAC(key)
h.Write(msg)
h.Sum(out)
}

13
vendor/golang.org/x/crypto/poly1305/sum_ppc64le.go generated vendored
View File

@ -2,24 +2,13 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build ppc64le,!gccgo,!appengine // +build !gccgo,!purego
package poly1305 package poly1305
//go:noescape //go:noescape
func update(state *macState, msg []byte) func update(state *macState, msg []byte)
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(key, &h.r, &h.s)
return
}
// mac is a wrapper for macGeneric that redirects calls that would have gone to // mac is a wrapper for macGeneric that redirects calls that would have gone to
// updateGeneric to update. // updateGeneric to update.
// //

2
vendor/golang.org/x/crypto/poly1305/sum_ppc64le.s generated vendored
View File

@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build ppc64le,!gccgo,!appengine // +build !gccgo,!purego
#include "textflag.h" #include "textflag.h"

70
vendor/golang.org/x/crypto/poly1305/sum_s390x.go generated vendored
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@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build s390x,go1.11,!gccgo,!appengine // +build !gccgo,!purego
package poly1305 package poly1305
@ -10,30 +10,66 @@ import (
"golang.org/x/sys/cpu" "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 // instructions. It must only be called if the vector facility (vx) is
// available. // available.
//go:noescape //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 // mac is a replacement for macGeneric that uses a larger buffer and redirects
// instructions, including VMSL. It must only be called if the vector facility (vx) is // calls that would have gone to updateGeneric to updateVX if the vector
// available and if VMSL is supported. // facility is installed.
//go:noescape //
func poly1305vmsl(out *[16]byte, m *byte, mlen uint64, key *[32]byte) // 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
func sum(out *[16]byte, m []byte, key *[32]byte) { 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 { if cpu.S390X.HasVX {
var mPtr *byte updateVX(&h.macState, h.buffer[:])
if len(m) > 0 {
mPtr = &m[0]
}
if cpu.S390X.HasVXE && len(m) > 256 {
poly1305vmsl(out, mPtr, uint64(len(m)), key)
} else { } else {
poly1305vx(out, mPtr, uint64(len(m)), key) 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 { } else {
sumGeneric(out, m, key) 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)
}

627
vendor/golang.org/x/crypto/poly1305/sum_s390x.s generated vendored
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@ -2,115 +2,187 @@
// Use of this source code is governed by a BSD-style // Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file. // license that can be found in the LICENSE file.
// +build s390x,go1.11,!gccgo,!appengine // +build !gccgo,!purego
#include "textflag.h" #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 // masking constants
#define MOD26 V0 #define MOD24 V0 // [0x0000000000ffffff, 0x0000000000ffffff] - mask low 24-bits
#define EX0 V1 #define MOD26 V1 // [0x0000000003ffffff, 0x0000000003ffffff] - mask low 26-bits
#define EX1 V2
#define EX2 V3
// temporaries // expansion constants (see EXPAND macro)
#define T_0 V4 #define EX0 V2
#define T_1 V5 #define EX1 V3
#define T_2 V6 #define EX2 V4
#define T_3 V7
#define T_4 V8
// key (r) // key (r², r or 1 depending on context)
#define R_0 V9 #define R_0 V5
#define R_1 V10 #define R_1 V6
#define R_2 V11 #define R_2 V7
#define R_3 V12 #define R_3 V8
#define R_4 V13 #define R_4 V9
#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
// message block // precalculated coefficients (5r², 5r or 0 depending on context)
#define F_0 V18 #define R5_1 V10
#define F_1 V19 #define R5_2 V11
#define F_2 V20 #define R5_3 V12
#define F_3 V21 #define R5_4 V13
#define F_4 V22
// accumulator // message block (m)
#define H_0 V23 #define M_0 V14
#define H_1 V24 #define M_1 V15
#define H_2 V25 #define M_2 V16
#define H_3 V26 #define M_3 V17
#define H_4 V27 #define M_4 V18
GLOBL ·keyMask<>(SB), RODATA, $16 // accumulator (h)
DATA ·keyMask<>+0(SB)/8, $0xffffff0ffcffff0f #define H_0 V19
DATA ·keyMask<>+8(SB)/8, $0xfcffff0ffcffff0f #define H_1 V20
#define H_2 V21
#define H_3 V22
#define H_4 V23
GLOBL ·bswapMask<>(SB), RODATA, $16 // temporary registers (for short-lived values)
DATA ·bswapMask<>+0(SB)/8, $0x0f0e0d0c0b0a0908 #define T_0 V24
DATA ·bswapMask<>+8(SB)/8, $0x0706050403020100 #define T_1 V25
#define T_2 V26
#define T_3 V27
#define T_4 V28
GLOBL ·constants<>(SB), RODATA, $64 GLOBL ·constants<>(SB), RODATA, $0x30
// MOD26
DATA ·constants<>+0(SB)/8, $0x3ffffff
DATA ·constants<>+8(SB)/8, $0x3ffffff
// EX0 // EX0
DATA ·constants<>+16(SB)/8, $0x0006050403020100 DATA ·constants<>+0x00(SB)/8, $0x0006050403020100
DATA ·constants<>+24(SB)/8, $0x1016151413121110 DATA ·constants<>+0x08(SB)/8, $0x1016151413121110
// EX1 // EX1
DATA ·constants<>+32(SB)/8, $0x060c0b0a09080706 DATA ·constants<>+0x10(SB)/8, $0x060c0b0a09080706
DATA ·constants<>+40(SB)/8, $0x161c1b1a19181716 DATA ·constants<>+0x18(SB)/8, $0x161c1b1a19181716
// EX2 // EX2
DATA ·constants<>+48(SB)/8, $0x0d0d0d0d0d0f0e0d DATA ·constants<>+0x20(SB)/8, $0x0d0d0d0d0d0f0e0d
DATA ·constants<>+56(SB)/8, $0x1d1d1d1d1d1f1e1d 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) \ #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, g0, h0 \
VMLOF f0, g1, h1 \
VMLOF f0, g2, h2 \
VMLOF f0, g3, h3 \ VMLOF f0, g3, h3 \
VMLOF f0, g1, h1 \
VMLOF f0, g4, h4 \ VMLOF f0, g4, h4 \
VMLOF f0, g2, h2 \
VMLOF f1, g54, T_0 \ VMLOF f1, g54, T_0 \
VMLOF f1, g0, T_1 \
VMLOF f1, g1, T_2 \
VMLOF f1, g2, T_3 \ VMLOF f1, g2, T_3 \
VMLOF f1, g0, T_1 \
VMLOF f1, g3, T_4 \ VMLOF f1, g3, T_4 \
VMLOF f1, g1, T_2 \
VMALOF f2, g53, h0, h0 \ VMALOF f2, g53, h0, h0 \
VMALOF f2, g54, h1, h1 \
VMALOF f2, g0, h2, h2 \
VMALOF f2, g1, h3, h3 \ VMALOF f2, g1, h3, h3 \
VMALOF f2, g54, h1, h1 \
VMALOF f2, g2, h4, h4 \ VMALOF f2, g2, h4, h4 \
VMALOF f2, g0, h2, h2 \
VMALOF f3, g52, T_0, T_0 \ 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, g0, T_3, T_3 \
VMALOF f3, g53, T_1, T_1 \
VMALOF f3, g1, T_4, T_4 \ VMALOF f3, g1, T_4, T_4 \
VMALOF f3, g54, T_2, T_2 \
VMALOF f4, g51, h0, h0 \ VMALOF f4, g51, h0, h0 \
VMALOF f4, g52, h1, h1 \
VMALOF f4, g53, h2, h2 \
VMALOF f4, g54, h3, h3 \ VMALOF f4, g54, h3, h3 \
VMALOF f4, g52, h1, h1 \
VMALOF f4, g0, h4, h4 \ VMALOF f4, g0, h4, h4 \
VMALOF f4, g53, h2, h2 \
VAG T_0, h0, h0 \ VAG T_0, h0, h0 \
VAG T_1, h1, h1 \
VAG T_2, h2, h2 \
VAG T_3, h3, h3 \ 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) \ #define REDUCE(h0, h1, h2, h3, h4) \
VESRLG $26, h0, T_0 \ VESRLG $26, h0, T_0 \
VESRLG $26, h3, T_1 \ VESRLG $26, h3, T_1 \
@ -136,144 +208,155 @@ DATA ·constants<>+56(SB)/8, $0x1d1d1d1d1d1f1e1d
VN MOD26, h3, h3 \ VN MOD26, h3, h3 \
VAG T_2, h4, h4 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) \ #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, EX0, d0 \
VPERM in0, in1, EX1, d2 \ VPERM in0, in1, EX1, d2 \
VN d1, d4, d4 \ VPERM in0, in1, EX2, d4 \
VESRLG $26, d0, d1 \ VESRLG $26, d0, d1 \
VESRLG $30, d2, d3 \ VESRLG $30, d2, d3 \
VESRLG $4, d2, d2 \ VESRLG $4, d2, d2 \
VN MOD26, d0, d0 \ VN MOD26, d0, d0 \ // [in0₂₆[0], in1₂₆[0]]
VN MOD26, d1, d1 \ VN MOD26, d3, d3 \ // [in0₂₆[3], in1₂₆[3]]
VN MOD26, d2, d2 \ VN MOD26, d1, d1 \ // [in0₂₆[1], in1₂₆[1]]
VN MOD26, d3, d3 VN MOD24, d4, d4 \ // [in0₂₆[4], in1₂₆[4]]
VN MOD26, d2, d2 // [in0₂₆[2], in1₂₆[2]]
// pack h4:h0 into h1:h0 (no carry) // func updateVX(state *macState, msg []byte)
#define PACK(h0, h1, h2, h3, h4) \ TEXT ·updateVX(SB), NOSPLIT, $0
VESLG $26, h1, h1 \ MOVD state+0(FP), R1
VESLG $26, h3, h3 \ LMG msg+8(FP), R2, R3 // R2=msg_base, R3=msg_len
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
// if h > 2**130-5 then h -= 2**130-5 // load EX0, EX1 and EX2
#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
MOVD $·constants<>(SB), R5 MOVD $·constants<>(SB), R5
VLM (R5), MOD26, EX2 VLM (R5), EX0, EX2
// setup r // generate masks
VL (R4), T_0 VGMG $(64-24), $63, MOD24 // [0x00ffffff, 0x00ffffff]
MOVD $·keyMask<>(SB), R6 VGMG $(64-26), $63, MOD26 // [0x03ffffff, 0x03ffffff]
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)
// setup r*5 // load h (accumulator) and r (key) from state
VLEIG $0, $5, T_0 VZERO T_1 // [0, 0]
VLEIG $1, $5, T_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) // unpack h and r into 26-bit limbs
VMLOF T_0, R_1, R5SAVE_1 // note: h₆₄[2] may have the low 3 bits set, so h₂₆[4] is a 27-bit value
VMLOF T_0, R_2, R5SAVE_2 VN MOD26, T_3, H_0 // [h₂₆[0], r₂₆[0]]
VMLOF T_0, R_3, R5SAVE_3 VZERO H_1 // [0, 0]
VMLOF T_0, R_4, R5SAVE_4 VZERO H_3 // [0, 0]
VLGVG $0, R_0, RSAVE_0 VGMG $(64-12-14), $(63-12), T_0 // [0x03fff000, 0x03fff000] - 26-bit mask with low 12 bits masked out
VLGVG $0, R_1, RSAVE_1 VESLG $24, T_1, T_1 // [h₆₄[2]<<24, 0]
VLGVG $0, R_2, RSAVE_2 VERIMG $-26&63, T_3, MOD26, H_1 // [h₂₆[1], r₂₆[1]]
VLGVG $0, R_3, RSAVE_3 VESRLG $+52&63, T_3, H_2 // [h₂₆[2], r₂₆[2]] - low 12 bits only
VLGVG $0, R_4, RSAVE_4 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 CMPBLE R3, $16, skip
// calculate r**2 // calculate r²
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) 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(H_0, H_1, H_2, H_3, H_4) REDUCE(M_0, M_1, M_2, M_3, M_4)
VLEIG $0, $5, T_0 VGBM $0x0f0f, T_0
VLEIG $1, $5, T_0 VERIMG $0, M_0, T_0, R_0 // [r₂₆[0], r²₂₆[0], r₂₆[0], r²₂₆[0]]
VMLOF T_0, H_1, R5_1 VERIMG $0, M_1, T_0, R_1 // [r₂₆[1], r²₂₆[1], r₂₆[1], r²₂₆[1]]
VMLOF T_0, H_2, R5_2 VERIMG $0, M_2, T_0, R_2 // [r₂₆[2], r²₂₆[2], r₂₆[2], r²₂₆[2]]
VMLOF T_0, H_3, R5_3 VERIMG $0, M_3, T_0, R_3 // [r₂₆[3], r²₂₆[3], r₂₆[3], r²₂₆[3]]
VMLOF T_0, H_4, R5_4 VERIMG $0, M_4, T_0, R_4 // [r₂₆[4], r²₂₆[4], r₂₆[4], r²₂₆[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
// initialize h // calculate 5r² (ignore least significant limb)
VZERO H_0 VREPIF $5, T_0
VZERO H_1 VMLF T_0, R_1, R5_1 // [5r₂₆[1], 5r²₂₆[1], 5r₂₆[1], 5r²₂₆[1]]
VZERO H_2 VMLF T_0, R_2, R5_2 // [5r₂₆[2], 5r²₂₆[2], 5r₂₆[2], 5r²₂₆[2]]
VZERO H_3 VMLF T_0, R_3, R5_3 // [5r₂₆[3], 5r²₂₆[3], 5r₂₆[3], 5r²₂₆[3]]
VZERO H_4 VMLF T_0, R_4, R5_4 // [5r₂₆[4], 5r²₂₆[4], 5r₂₆[4], 5r²₂₆[4]]
loop: loop:
CMPBLE R3, $32, b2 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 VLM (R2), T_0, T_1
// update message slice
SUB $32, R3 SUB $32, R3
MOVD $32(R2), R2 MOVD $32(R2), R2
EXPAND(T_0, T_1, F_0, F_1, F_2, F_3, F_4)
VLEIB $4, $1, F_4 // unpack message blocks into 26-bit big-endian limbs
VLEIB $12, $1, F_4 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: multiply:
VAG H_0, F_0, F_0 // accumulate the incoming message
VAG H_1, F_1, F_1 VAG H_0, M_0, M_0
VAG H_2, F_2, F_2 VAG H_3, M_3, M_3
VAG H_3, F_3, F_3 VAG H_1, M_1, M_1
VAG H_4, F_4, F_4 VAG H_4, M_4, M_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) 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) REDUCE(H_0, H_1, H_2, H_3, H_4)
CMPBNE R3, $0, loop CMPBNE R3, $0, loop
finish: finish:
// sum vectors // sum lane 0 and lane 1 and put the result in lane 1
VZERO T_0 VZERO T_0
VSUMQG H_0, T_0, H_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_3, T_0, H_3
VSUMQG H_1, T_0, H_1
VSUMQG H_4, T_0, H_4 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) 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 VESRLG $26, H_1, T_1
VN MOD26, H_1, H_1 VN MOD26, H_1, H_1
VAQ T_1, H_2, H_2 VAQ T_1, H_2, H_2
@ -284,95 +367,137 @@ finish:
VN MOD26, H_3, H_3 VN MOD26, H_3, H_3
VAQ T_3, H_4, H_4 VAQ T_3, H_4, H_4
// h is now < 2*(2**130-5) // h is now < 2(2¹³⁰ - 5)
// pack h into h1 (hi) and h0 (lo) // Pack each lane in h₂₆[0:4] into h₁₂₈[0:1].
PACK(H_0, H_1, H_2, H_3, H_4) VESLG $26, H_1, H_1
VESLG $26, H_3, H_3
// if h > 2**130-5 then h -= 2**130-5 VO H_0, H_1, H_0
MOD(H_0, H_1, T_0, T_1, T_2) VO H_2, H_3, H_2
VESLG $4, H_2, H_2
// h += s VLEIB $7, $48, H_1
MOVD $·bswapMask<>(SB), R5 VSLB H_1, H_2, H_2
VL (R5), T_1 VO H_0, H_2, H_0
VL 16(R4), T_0 VLEIB $7, $104, H_1
VPERM T_0, T_0, T_1, T_0 // reverse bytes (to big) VSLB H_1, H_4, H_3
VAQ T_0, H_0, H_0 VO H_3, H_0, H_0
VPERM H_0, H_0, T_1, H_0 // reverse bytes (to little) VLEIB $7, $24, H_1
VST H_0, (R1) 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 RET
b2: b2: // 2 or fewer blocks remaining
CMPBLE R3, $16, b1 CMPBLE R3, $16, b1
// 2 blocks remaining // Load the 2 remaining blocks (17-32 bytes remaining).
SUB $17, R3 MOVD $-17(R3), R0 // index of final byte to load modulo 16
VL (R2), T_0 VL (R2), T_0 // load full 16 byte block
VLL R3, 16(R2), T_1 VLL R0, 16(R2), T_1 // load final (possibly partial) block and pad with zeros to 16 bytes
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
// setup [r²,r] // The Poly1305 algorithm requires that a 1 bit be appended to
VLVGG $1, RSAVE_0, R_0 // each message block. If the final block is less than 16 bytes
VLVGG $1, RSAVE_1, R_1 // long then it is easiest to insert the 1 before the message
VLVGG $1, RSAVE_2, R_2 // block is split into 26-bit limbs. If, on the other hand, the
VLVGG $1, RSAVE_3, R_3 // final message block is 16 bytes long then we append the 1 bit
VLVGG $1, RSAVE_4, R_4 // after expansion as normal.
VPDI $0, R5_1, R5SAVE_1, R5_1 MOVBZ $1, R0
VPDI $0, R5_2, R5SAVE_2, R5_2 MOVD $-16(R3), R3 // index of byte in last block to insert 1 at (could be 16)
VPDI $0, R5_3, R5SAVE_3, R5_3 CMPBEQ R3, $16, 2(PC) // skip the insertion if the final block is 16 bytes long
VPDI $0, R5_4, R5SAVE_4, R5_4 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 MOVD $0, R3
BR multiply BR multiply
skip: skip:
VZERO H_0
VZERO H_1
VZERO H_2
VZERO H_3
VZERO H_4
CMPBEQ R3, $0, finish CMPBEQ R3, $0, finish
b1: b1: // 1 block remaining
// 1 block remaining
SUB $1, R3 // Load the final block (1-16 bytes). This will be placed into
VLL R3, (R2), T_0 // lane 0.
ADD $1, R3 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 MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC) CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, T_0 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] // Set the message block in lane 1 to the value 0 so that it
VLVGG $0, RSAVE_0, R_0 // can be accumulated without affecting the final result.
VLVGG $0, RSAVE_1, R_1 VZERO T_1
VLVGG $0, RSAVE_2, R_2
VLVGG $0, RSAVE_3, R_3 // Split the final message block into 26-bit limbs in lane 0.
VLVGG $0, RSAVE_4, R_4 // Lane 1 will be contain 0.
VPDI $0, R5SAVE_1, R5_1, R5_1 EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4)
VPDI $0, R5SAVE_2, R5_2, R5_2
VPDI $0, R5SAVE_3, R5_3, R5_3 // Append a 1 byte to the end of the last block only if it is a
VPDI $0, R5SAVE_4, R5_4, R5_4 // 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 MOVD $0, R3
BR multiply BR multiply

909
vendor/golang.org/x/crypto/poly1305/sum_vmsl_s390x.s generated vendored
View File

@ -1,909 +0,0 @@
// 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 s390x,go1.11,!gccgo,!appengine
#include "textflag.h"
// Implementation of Poly1305 using the vector facility (vx) and the VMSL instruction.
// constants
#define EX0 V1
#define EX1 V2
#define EX2 V3
// temporaries
#define T_0 V4
#define T_1 V5
#define T_2 V6
#define T_3 V7
#define T_4 V8
#define T_5 V9
#define T_6 V10
#define T_7 V11
#define T_8 V12
#define T_9 V13
#define T_10 V14
// r**2 & r**4
#define R_0 V15
#define R_1 V16
#define R_2 V17
#define R5_1 V18
#define R5_2 V19
// key (r)
#define RSAVE_0 R7
#define RSAVE_1 R8
#define RSAVE_2 R9
#define R5SAVE_1 R10
#define R5SAVE_2 R11
// message block
#define M0 V20
#define M1 V21
#define M2 V22
#define M3 V23
#define M4 V24
#define M5 V25
// accumulator
#define H0_0 V26
#define H1_0 V27
#define H2_0 V28
#define H0_1 V29
#define H1_1 V30
#define H2_1 V31
GLOBL ·keyMask<>(SB), RODATA, $16
DATA ·keyMask<>+0(SB)/8, $0xffffff0ffcffff0f
DATA ·keyMask<>+8(SB)/8, $0xfcffff0ffcffff0f
GLOBL ·bswapMask<>(SB), RODATA, $16
DATA ·bswapMask<>+0(SB)/8, $0x0f0e0d0c0b0a0908
DATA ·bswapMask<>+8(SB)/8, $0x0706050403020100
GLOBL ·constants<>(SB), RODATA, $48
// EX0
DATA ·constants<>+0(SB)/8, $0x18191a1b1c1d1e1f
DATA ·constants<>+8(SB)/8, $0x0000050403020100
// EX1
DATA ·constants<>+16(SB)/8, $0x18191a1b1c1d1e1f
DATA ·constants<>+24(SB)/8, $0x00000a0908070605
// EX2
DATA ·constants<>+32(SB)/8, $0x18191a1b1c1d1e1f
DATA ·constants<>+40(SB)/8, $0x0000000f0e0d0c0b
GLOBL ·c<>(SB), RODATA, $48
// EX0
DATA ·c<>+0(SB)/8, $0x0000050403020100
DATA ·c<>+8(SB)/8, $0x0000151413121110
// EX1
DATA ·c<>+16(SB)/8, $0x00000a0908070605
DATA ·c<>+24(SB)/8, $0x00001a1918171615
// EX2
DATA ·c<>+32(SB)/8, $0x0000000f0e0d0c0b
DATA ·c<>+40(SB)/8, $0x0000001f1e1d1c1b
GLOBL ·reduce<>(SB), RODATA, $32
// 44 bit
DATA ·reduce<>+0(SB)/8, $0x0
DATA ·reduce<>+8(SB)/8, $0xfffffffffff
// 42 bit
DATA ·reduce<>+16(SB)/8, $0x0
DATA ·reduce<>+24(SB)/8, $0x3ffffffffff
// h = (f*g) % (2**130-5) [partial reduction]
// uses T_0...T_9 temporary registers
// input: m02_0, m02_1, m02_2, m13_0, m13_1, m13_2, r_0, r_1, r_2, r5_1, r5_2, m4_0, m4_1, m4_2, m5_0, m5_1, m5_2
// temp: t0, t1, t2, t3, t4, t5, t6, t7, t8, t9
// output: m02_0, m02_1, m02_2, m13_0, m13_1, m13_2
#define MULTIPLY(m02_0, m02_1, m02_2, m13_0, m13_1, m13_2, r_0, r_1, r_2, r5_1, r5_2, m4_0, m4_1, m4_2, m5_0, m5_1, m5_2, t0, t1, t2, t3, t4, t5, t6, t7, t8, t9) \
\ // Eliminate the dependency for the last 2 VMSLs
VMSLG m02_0, r_2, m4_2, m4_2 \
VMSLG m13_0, r_2, m5_2, m5_2 \ // 8 VMSLs pipelined
VMSLG m02_0, r_0, m4_0, m4_0 \
VMSLG m02_1, r5_2, V0, T_0 \
VMSLG m02_0, r_1, m4_1, m4_1 \
VMSLG m02_1, r_0, V0, T_1 \
VMSLG m02_1, r_1, V0, T_2 \
VMSLG m02_2, r5_1, V0, T_3 \
VMSLG m02_2, r5_2, V0, T_4 \
VMSLG m13_0, r_0, m5_0, m5_0 \
VMSLG m13_1, r5_2, V0, T_5 \
VMSLG m13_0, r_1, m5_1, m5_1 \
VMSLG m13_1, r_0, V0, T_6 \
VMSLG m13_1, r_1, V0, T_7 \
VMSLG m13_2, r5_1, V0, T_8 \
VMSLG m13_2, r5_2, V0, T_9 \
VMSLG m02_2, r_0, m4_2, m4_2 \
VMSLG m13_2, r_0, m5_2, m5_2 \
VAQ m4_0, T_0, m02_0 \
VAQ m4_1, T_1, m02_1 \
VAQ m5_0, T_5, m13_0 \
VAQ m5_1, T_6, m13_1 \
VAQ m02_0, T_3, m02_0 \
VAQ m02_1, T_4, m02_1 \
VAQ m13_0, T_8, m13_0 \
VAQ m13_1, T_9, m13_1 \
VAQ m4_2, T_2, m02_2 \
VAQ m5_2, T_7, m13_2 \
// SQUARE uses three limbs of r and r_2*5 to output square of r
// uses T_1, T_5 and T_7 temporary registers
// input: r_0, r_1, r_2, r5_2
// temp: TEMP0, TEMP1, TEMP2
// output: p0, p1, p2
#define SQUARE(r_0, r_1, r_2, r5_2, p0, p1, p2, TEMP0, TEMP1, TEMP2) \
VMSLG r_0, r_0, p0, p0 \
VMSLG r_1, r5_2, V0, TEMP0 \
VMSLG r_2, r5_2, p1, p1 \
VMSLG r_0, r_1, V0, TEMP1 \
VMSLG r_1, r_1, p2, p2 \
VMSLG r_0, r_2, V0, TEMP2 \
VAQ TEMP0, p0, p0 \
VAQ TEMP1, p1, p1 \
VAQ TEMP2, p2, p2 \
VAQ TEMP0, p0, p0 \
VAQ TEMP1, p1, p1 \
VAQ TEMP2, p2, p2 \
// carry h0->h1->h2->h0 || h3->h4->h5->h3
// uses T_2, T_4, T_5, T_7, T_8, T_9
// t6, t7, t8, t9, t10, t11
// input: h0, h1, h2, h3, h4, h5
// temp: t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11
// output: h0, h1, h2, h3, h4, h5
#define REDUCE(h0, h1, h2, h3, h4, h5, t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11) \
VLM (R12), t6, t7 \ // 44 and 42 bit clear mask
VLEIB $7, $0x28, t10 \ // 5 byte shift mask
VREPIB $4, t8 \ // 4 bit shift mask
VREPIB $2, t11 \ // 2 bit shift mask
VSRLB t10, h0, t0 \ // h0 byte shift
VSRLB t10, h1, t1 \ // h1 byte shift
VSRLB t10, h2, t2 \ // h2 byte shift
VSRLB t10, h3, t3 \ // h3 byte shift
VSRLB t10, h4, t4 \ // h4 byte shift
VSRLB t10, h5, t5 \ // h5 byte shift
VSRL t8, t0, t0 \ // h0 bit shift
VSRL t8, t1, t1 \ // h2 bit shift
VSRL t11, t2, t2 \ // h2 bit shift
VSRL t8, t3, t3 \ // h3 bit shift
VSRL t8, t4, t4 \ // h4 bit shift
VESLG $2, t2, t9 \ // h2 carry x5
VSRL t11, t5, t5 \ // h5 bit shift
VN t6, h0, h0 \ // h0 clear carry
VAQ t2, t9, t2 \ // h2 carry x5
VESLG $2, t5, t9 \ // h5 carry x5
VN t6, h1, h1 \ // h1 clear carry
VN t7, h2, h2 \ // h2 clear carry
VAQ t5, t9, t5 \ // h5 carry x5
VN t6, h3, h3 \ // h3 clear carry
VN t6, h4, h4 \ // h4 clear carry
VN t7, h5, h5 \ // h5 clear carry
VAQ t0, h1, h1 \ // h0->h1
VAQ t3, h4, h4 \ // h3->h4
VAQ t1, h2, h2 \ // h1->h2
VAQ t4, h5, h5 \ // h4->h5
VAQ t2, h0, h0 \ // h2->h0
VAQ t5, h3, h3 \ // h5->h3
VREPG $1, t6, t6 \ // 44 and 42 bit masks across both halves
VREPG $1, t7, t7 \
VSLDB $8, h0, h0, h0 \ // set up [h0/1/2, h3/4/5]
VSLDB $8, h1, h1, h1 \
VSLDB $8, h2, h2, h2 \
VO h0, h3, h3 \
VO h1, h4, h4 \
VO h2, h5, h5 \
VESRLG $44, h3, t0 \ // 44 bit shift right
VESRLG $44, h4, t1 \
VESRLG $42, h5, t2 \
VN t6, h3, h3 \ // clear carry bits
VN t6, h4, h4 \
VN t7, h5, h5 \
VESLG $2, t2, t9 \ // multiply carry by 5
VAQ t9, t2, t2 \
VAQ t0, h4, h4 \
VAQ t1, h5, h5 \
VAQ t2, h3, h3 \
// carry h0->h1->h2->h0
// input: h0, h1, h2
// temp: t0, t1, t2, t3, t4, t5, t6, t7, t8
// output: h0, h1, h2
#define REDUCE2(h0, h1, h2, t0, t1, t2, t3, t4, t5, t6, t7, t8) \
VLEIB $7, $0x28, t3 \ // 5 byte shift mask
VREPIB $4, t4 \ // 4 bit shift mask
VREPIB $2, t7 \ // 2 bit shift mask
VGBM $0x003F, t5 \ // mask to clear carry bits
VSRLB t3, h0, t0 \
VSRLB t3, h1, t1 \
VSRLB t3, h2, t2 \
VESRLG $4, t5, t5 \ // 44 bit clear mask
VSRL t4, t0, t0 \
VSRL t4, t1, t1 \
VSRL t7, t2, t2 \
VESRLG $2, t5, t6 \ // 42 bit clear mask
VESLG $2, t2, t8 \
VAQ t8, t2, t2 \
VN t5, h0, h0 \
VN t5, h1, h1 \
VN t6, h2, h2 \
VAQ t0, h1, h1 \
VAQ t1, h2, h2 \
VAQ t2, h0, h0 \
VSRLB t3, h0, t0 \
VSRLB t3, h1, t1 \
VSRLB t3, h2, t2 \
VSRL t4, t0, t0 \
VSRL t4, t1, t1 \
VSRL t7, t2, t2 \
VN t5, h0, h0 \
VN t5, h1, h1 \
VESLG $2, t2, t8 \
VN t6, h2, h2 \
VAQ t0, h1, h1 \
VAQ t8, t2, t2 \
VAQ t1, h2, h2 \
VAQ t2, h0, h0 \
// expands two message blocks into the lower halfs of the d registers
// moves the contents of the d registers into upper halfs
// input: in1, in2, d0, d1, d2, d3, d4, d5
// temp: TEMP0, TEMP1, TEMP2, TEMP3
// output: d0, d1, d2, d3, d4, d5
#define EXPACC(in1, in2, d0, d1, d2, d3, d4, d5, TEMP0, TEMP1, TEMP2, TEMP3) \
VGBM $0xff3f, TEMP0 \
VGBM $0xff1f, TEMP1 \
VESLG $4, d1, TEMP2 \
VESLG $4, d4, TEMP3 \
VESRLG $4, TEMP0, TEMP0 \
VPERM in1, d0, EX0, d0 \
VPERM in2, d3, EX0, d3 \
VPERM in1, d2, EX2, d2 \
VPERM in2, d5, EX2, d5 \
VPERM in1, TEMP2, EX1, d1 \
VPERM in2, TEMP3, EX1, d4 \
VN TEMP0, d0, d0 \
VN TEMP0, d3, d3 \
VESRLG $4, d1, d1 \
VESRLG $4, d4, d4 \
VN TEMP1, d2, d2 \
VN TEMP1, d5, d5 \
VN TEMP0, d1, d1 \
VN TEMP0, d4, d4 \
// expands one message block into the lower halfs of the d registers
// moves the contents of the d registers into upper halfs
// input: in, d0, d1, d2
// temp: TEMP0, TEMP1, TEMP2
// output: d0, d1, d2
#define EXPACC2(in, d0, d1, d2, TEMP0, TEMP1, TEMP2) \
VGBM $0xff3f, TEMP0 \
VESLG $4, d1, TEMP2 \
VGBM $0xff1f, TEMP1 \
VPERM in, d0, EX0, d0 \
VESRLG $4, TEMP0, TEMP0 \
VPERM in, d2, EX2, d2 \
VPERM in, TEMP2, EX1, d1 \
VN TEMP0, d0, d0 \
VN TEMP1, d2, d2 \
VESRLG $4, d1, d1 \
VN TEMP0, d1, d1 \
// pack h2:h0 into h1:h0 (no carry)
// input: h0, h1, h2
// output: h0, h1, h2
#define PACK(h0, h1, h2) \
VMRLG h1, h2, h2 \ // copy h1 to upper half h2
VESLG $44, h1, h1 \ // shift limb 1 44 bits, leaving 20
VO h0, h1, h0 \ // combine h0 with 20 bits from limb 1
VESRLG $20, h2, h1 \ // put top 24 bits of limb 1 into h1
VLEIG $1, $0, h1 \ // clear h2 stuff from lower half of h1
VO h0, h1, h0 \ // h0 now has 88 bits (limb 0 and 1)
VLEIG $0, $0, h2 \ // clear upper half of h2
VESRLG $40, h2, h1 \ // h1 now has upper two bits of result
VLEIB $7, $88, h1 \ // for byte shift (11 bytes)
VSLB h1, h2, h2 \ // shift h2 11 bytes to the left
VO h0, h2, h0 \ // combine h0 with 20 bits from limb 1
VLEIG $0, $0, h1 \ // clear upper half of h1
// if h > 2**130-5 then h -= 2**130-5
// input: h0, h1
// temp: t0, t1, t2
// output: h0
#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 poly1305vmsl(out *[16]byte, m *byte, mlen uint64, key *[32]key)
TEXT ·poly1305vmsl(SB), $0-32
// This code processes 6 + up to 4 blocks (32 bytes) per iteration
// using the algorithm described in:
// NEON crypto, Daniel J. Bernstein & Peter Schwabe
// https://cryptojedi.org/papers/neoncrypto-20120320.pdf
// And as moddified for VMSL as described in
// Accelerating Poly1305 Cryptographic Message Authentication on the z14
// O'Farrell et al, CASCON 2017, p48-55
// https://ibm.ent.box.com/s/jf9gedj0e9d2vjctfyh186shaztavnht
LMG out+0(FP), R1, R4 // R1=out, R2=m, R3=mlen, R4=key
VZERO V0 // c
// load EX0, EX1 and EX2
MOVD $·constants<>(SB), R5
VLM (R5), EX0, EX2 // c
// setup r
VL (R4), T_0
MOVD $·keyMask<>(SB), R6
VL (R6), T_1
VN T_0, T_1, T_0
VZERO T_2 // limbs for r
VZERO T_3
VZERO T_4
EXPACC2(T_0, T_2, T_3, T_4, T_1, T_5, T_7)
// T_2, T_3, T_4: [0, r]
// setup r*20
VLEIG $0, $0, T_0
VLEIG $1, $20, T_0 // T_0: [0, 20]
VZERO T_5
VZERO T_6
VMSLG T_0, T_3, T_5, T_5
VMSLG T_0, T_4, T_6, T_6
// store r for final block in GR
VLGVG $1, T_2, RSAVE_0 // c
VLGVG $1, T_3, RSAVE_1 // c
VLGVG $1, T_4, RSAVE_2 // c
VLGVG $1, T_5, R5SAVE_1 // c
VLGVG $1, T_6, R5SAVE_2 // c
// initialize h
VZERO H0_0
VZERO H1_0
VZERO H2_0
VZERO H0_1
VZERO H1_1
VZERO H2_1
// initialize pointer for reduce constants
MOVD $·reduce<>(SB), R12
// calculate r**2 and 20*(r**2)
VZERO R_0
VZERO R_1
VZERO R_2
SQUARE(T_2, T_3, T_4, T_6, R_0, R_1, R_2, T_1, T_5, T_7)
REDUCE2(R_0, R_1, R_2, M0, M1, M2, M3, M4, R5_1, R5_2, M5, T_1)
VZERO R5_1
VZERO R5_2
VMSLG T_0, R_1, R5_1, R5_1
VMSLG T_0, R_2, R5_2, R5_2
// skip r**4 calculation if 3 blocks or less
CMPBLE R3, $48, b4
// calculate r**4 and 20*(r**4)
VZERO T_8
VZERO T_9
VZERO T_10
SQUARE(R_0, R_1, R_2, R5_2, T_8, T_9, T_10, T_1, T_5, T_7)
REDUCE2(T_8, T_9, T_10, M0, M1, M2, M3, M4, T_2, T_3, M5, T_1)
VZERO T_2
VZERO T_3
VMSLG T_0, T_9, T_2, T_2
VMSLG T_0, T_10, T_3, T_3
// put r**2 to the right and r**4 to the left of R_0, R_1, R_2
VSLDB $8, T_8, T_8, T_8
VSLDB $8, T_9, T_9, T_9
VSLDB $8, T_10, T_10, T_10
VSLDB $8, T_2, T_2, T_2
VSLDB $8, T_3, T_3, T_3
VO T_8, R_0, R_0
VO T_9, R_1, R_1
VO T_10, R_2, R_2
VO T_2, R5_1, R5_1
VO T_3, R5_2, R5_2
CMPBLE R3, $80, load // less than or equal to 5 blocks in message
// 6(or 5+1) blocks
SUB $81, R3
VLM (R2), M0, M4
VLL R3, 80(R2), M5
ADD $1, R3
MOVBZ $1, R0
CMPBGE R3, $16, 2(PC)
VLVGB R3, R0, M5
MOVD $96(R2), R2
EXPACC(M0, M1, H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_0, T_1, T_2, T_3)
EXPACC(M2, M3, H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_0, T_1, T_2, T_3)
VLEIB $2, $1, H2_0
VLEIB $2, $1, H2_1
VLEIB $10, $1, H2_0
VLEIB $10, $1, H2_1
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO T_4
VZERO T_10
EXPACC(M4, M5, M0, M1, M2, M3, T_4, T_10, T_0, T_1, T_2, T_3)
VLR T_4, M4
VLEIB $10, $1, M2
CMPBLT R3, $16, 2(PC)
VLEIB $10, $1, T_10
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, T_10, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, M2, M3, M4, T_4, T_5, T_2, T_7, T_8, T_9)
VMRHG V0, H0_1, H0_0
VMRHG V0, H1_1, H1_0
VMRHG V0, H2_1, H2_0
VMRLG V0, H0_1, H0_1
VMRLG V0, H1_1, H1_1
VMRLG V0, H2_1, H2_1
SUB $16, R3
CMPBLE R3, $0, square
load:
// load EX0, EX1 and EX2
MOVD $·c<>(SB), R5
VLM (R5), EX0, EX2
loop:
CMPBLE R3, $64, add // b4 // last 4 or less blocks left
// next 4 full blocks
VLM (R2), M2, M5
SUB $64, R3
MOVD $64(R2), R2
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, T_0, T_1, T_3, T_4, T_5, T_2, T_7, T_8, T_9)
// expacc in-lined to create [m2, m3] limbs
VGBM $0x3f3f, T_0 // 44 bit clear mask
VGBM $0x1f1f, T_1 // 40 bit clear mask
VPERM M2, M3, EX0, T_3
VESRLG $4, T_0, T_0 // 44 bit clear mask ready
VPERM M2, M3, EX1, T_4
VPERM M2, M3, EX2, T_5
VN T_0, T_3, T_3
VESRLG $4, T_4, T_4
VN T_1, T_5, T_5
VN T_0, T_4, T_4
VMRHG H0_1, T_3, H0_0
VMRHG H1_1, T_4, H1_0
VMRHG H2_1, T_5, H2_0
VMRLG H0_1, T_3, H0_1
VMRLG H1_1, T_4, H1_1
VMRLG H2_1, T_5, H2_1
VLEIB $10, $1, H2_0
VLEIB $10, $1, H2_1
VPERM M4, M5, EX0, T_3
VPERM M4, M5, EX1, T_4
VPERM M4, M5, EX2, T_5
VN T_0, T_3, T_3
VESRLG $4, T_4, T_4
VN T_1, T_5, T_5
VN T_0, T_4, T_4
VMRHG V0, T_3, M0
VMRHG V0, T_4, M1
VMRHG V0, T_5, M2
VMRLG V0, T_3, M3
VMRLG V0, T_4, M4
VMRLG V0, T_5, M5
VLEIB $10, $1, M2
VLEIB $10, $1, M5
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
CMPBNE R3, $0, loop
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, M3, M4, M5, T_4, T_5, T_2, T_7, T_8, T_9)
VMRHG V0, H0_1, H0_0
VMRHG V0, H1_1, H1_0
VMRHG V0, H2_1, H2_0
VMRLG V0, H0_1, H0_1
VMRLG V0, H1_1, H1_1
VMRLG V0, H2_1, H2_1
// load EX0, EX1, EX2
MOVD $·constants<>(SB), R5
VLM (R5), EX0, EX2
// sum vectors
VAQ H0_0, H0_1, H0_0
VAQ H1_0, H1_1, H1_0
VAQ H2_0, H2_1, H2_0
// h may be >= 2*(2**130-5) so we need to reduce it again
// M0...M4 are used as temps here
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, T_9, T_10, H0_1, M5)
next: // carry h1->h2
VLEIB $7, $0x28, T_1
VREPIB $4, T_2
VGBM $0x003F, T_3
VESRLG $4, T_3
// byte shift
VSRLB T_1, H1_0, T_4
// bit shift
VSRL T_2, T_4, T_4
// clear h1 carry bits
VN T_3, H1_0, H1_0
// add carry
VAQ T_4, H2_0, H2_0
// h is now < 2*(2**130-5)
// pack h into h1 (hi) and h0 (lo)
PACK(H0_0, H1_0, H2_0)
// if h > 2**130-5 then h -= 2**130-5
MOD(H0_0, H1_0, 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, H0_0, H0_0
VPERM H0_0, H0_0, T_1, H0_0 // reverse bytes (to little)
VST H0_0, (R1)
RET
add:
// load EX0, EX1, EX2
MOVD $·constants<>(SB), R5
VLM (R5), EX0, EX2
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, M3, M4, M5, T_4, T_5, T_2, T_7, T_8, T_9)
VMRHG V0, H0_1, H0_0
VMRHG V0, H1_1, H1_0
VMRHG V0, H2_1, H2_0
VMRLG V0, H0_1, H0_1
VMRLG V0, H1_1, H1_1
VMRLG V0, H2_1, H2_1
CMPBLE R3, $64, b4
b4:
CMPBLE R3, $48, b3 // 3 blocks or less
// 4(3+1) blocks remaining
SUB $49, R3
VLM (R2), M0, M2
VLL R3, 48(R2), M3
ADD $1, R3
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, M3
MOVD $64(R2), R2
EXPACC(M0, M1, H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_0, T_1, T_2, T_3)
VLEIB $10, $1, H2_0
VLEIB $10, $1, H2_1
VZERO M0
VZERO M1
VZERO M4
VZERO M5
VZERO T_4
VZERO T_10
EXPACC(M2, M3, M0, M1, M4, M5, T_4, T_10, T_0, T_1, T_2, T_3)
VLR T_4, M2
VLEIB $10, $1, M4
CMPBNE R3, $16, 2(PC)
VLEIB $10, $1, T_10
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M4, M5, M2, T_10, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, M3, M4, M5, T_4, T_5, T_2, T_7, T_8, T_9)
VMRHG V0, H0_1, H0_0
VMRHG V0, H1_1, H1_0
VMRHG V0, H2_1, H2_0
VMRLG V0, H0_1, H0_1
VMRLG V0, H1_1, H1_1
VMRLG V0, H2_1, H2_1
SUB $16, R3
CMPBLE R3, $0, square // this condition must always hold true!
b3:
CMPBLE R3, $32, b2
// 3 blocks remaining
// setup [r²,r]
VSLDB $8, R_0, R_0, R_0
VSLDB $8, R_1, R_1, R_1
VSLDB $8, R_2, R_2, R_2
VSLDB $8, R5_1, R5_1, R5_1
VSLDB $8, R5_2, R5_2, R5_2
VLVGG $1, RSAVE_0, R_0
VLVGG $1, RSAVE_1, R_1
VLVGG $1, RSAVE_2, R_2
VLVGG $1, R5SAVE_1, R5_1
VLVGG $1, R5SAVE_2, R5_2
// setup [h0, h1]
VSLDB $8, H0_0, H0_0, H0_0
VSLDB $8, H1_0, H1_0, H1_0
VSLDB $8, H2_0, H2_0, H2_0
VO H0_1, H0_0, H0_0
VO H1_1, H1_0, H1_0
VO H2_1, H2_0, H2_0
VZERO H0_1
VZERO H1_1
VZERO H2_1
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
// H*[r**2, r]
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, H0_1, H1_1, T_10, M5)
SUB $33, R3
VLM (R2), M0, M1
VLL R3, 32(R2), M2
ADD $1, R3
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, M2
// H += m0
VZERO T_1
VZERO T_2
VZERO T_3
EXPACC2(M0, T_1, T_2, T_3, T_4, T_5, T_6)
VLEIB $10, $1, T_3
VAG H0_0, T_1, H0_0
VAG H1_0, T_2, H1_0
VAG H2_0, T_3, H2_0
VZERO M0
VZERO M3
VZERO M4
VZERO M5
VZERO T_10
// (H+m0)*r
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M3, M4, M5, V0, T_10, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M3, M4, M5, T_10, H0_1, H1_1, H2_1, T_9)
// H += m1
VZERO V0
VZERO T_1
VZERO T_2
VZERO T_3
EXPACC2(M1, T_1, T_2, T_3, T_4, T_5, T_6)
VLEIB $10, $1, T_3
VAQ H0_0, T_1, H0_0
VAQ H1_0, T_2, H1_0
VAQ H2_0, T_3, H2_0
REDUCE2(H0_0, H1_0, H2_0, M0, M3, M4, M5, T_9, H0_1, H1_1, H2_1, T_10)
// [H, m2] * [r**2, r]
EXPACC2(M2, H0_0, H1_0, H2_0, T_1, T_2, T_3)
CMPBNE R3, $16, 2(PC)
VLEIB $10, $1, H2_0
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, H0_1, H1_1, M5, T_10)
SUB $16, R3
CMPBLE R3, $0, next // this condition must always hold true!
b2:
CMPBLE R3, $16, b1
// 2 blocks remaining
// setup [r²,r]
VSLDB $8, R_0, R_0, R_0
VSLDB $8, R_1, R_1, R_1
VSLDB $8, R_2, R_2, R_2
VSLDB $8, R5_1, R5_1, R5_1
VSLDB $8, R5_2, R5_2, R5_2
VLVGG $1, RSAVE_0, R_0
VLVGG $1, RSAVE_1, R_1
VLVGG $1, RSAVE_2, R_2
VLVGG $1, R5SAVE_1, R5_1
VLVGG $1, R5SAVE_2, R5_2
// setup [h0, h1]
VSLDB $8, H0_0, H0_0, H0_0
VSLDB $8, H1_0, H1_0, H1_0
VSLDB $8, H2_0, H2_0, H2_0
VO H0_1, H0_0, H0_0
VO H1_1, H1_0, H1_0
VO H2_1, H2_0, H2_0
VZERO H0_1
VZERO H1_1
VZERO H2_1
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
// H*[r**2, r]
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, T_10, M0, M1, M2, M3, M4, T_4, T_5, T_2, T_7, T_8, T_9)
VMRHG V0, H0_1, H0_0
VMRHG V0, H1_1, H1_0
VMRHG V0, H2_1, H2_0
VMRLG V0, H0_1, H0_1
VMRLG V0, H1_1, H1_1
VMRLG V0, H2_1, H2_1
// move h to the left and 0s at the right
VSLDB $8, H0_0, H0_0, H0_0
VSLDB $8, H1_0, H1_0, H1_0
VSLDB $8, H2_0, H2_0, H2_0
// get message blocks and append 1 to start
SUB $17, R3
VL (R2), M0
VLL R3, 16(R2), M1
ADD $1, R3
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, M1
VZERO T_6
VZERO T_7
VZERO T_8
EXPACC2(M0, T_6, T_7, T_8, T_1, T_2, T_3)
EXPACC2(M1, T_6, T_7, T_8, T_1, T_2, T_3)
VLEIB $2, $1, T_8
CMPBNE R3, $16, 2(PC)
VLEIB $10, $1, T_8
// add [m0, m1] to h
VAG H0_0, T_6, H0_0
VAG H1_0, T_7, H1_0
VAG H2_0, T_8, H2_0
VZERO M2
VZERO M3
VZERO M4
VZERO M5
VZERO T_10
VZERO M0
// at this point R_0 .. R5_2 look like [r**2, r]
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M2, M3, M4, M5, T_10, M0, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M2, M3, M4, M5, T_9, H0_1, H1_1, H2_1, T_10)
SUB $16, R3, R3
CMPBLE R3, $0, next
b1:
CMPBLE R3, $0, next
// 1 block remaining
// setup [r²,r]
VSLDB $8, R_0, R_0, R_0
VSLDB $8, R_1, R_1, R_1
VSLDB $8, R_2, R_2, R_2
VSLDB $8, R5_1, R5_1, R5_1
VSLDB $8, R5_2, R5_2, R5_2
VLVGG $1, RSAVE_0, R_0
VLVGG $1, RSAVE_1, R_1
VLVGG $1, RSAVE_2, R_2
VLVGG $1, R5SAVE_1, R5_1
VLVGG $1, R5SAVE_2, R5_2
// setup [h0, h1]
VSLDB $8, H0_0, H0_0, H0_0
VSLDB $8, H1_0, H1_0, H1_0
VSLDB $8, H2_0, H2_0, H2_0
VO H0_1, H0_0, H0_0
VO H1_1, H1_0, H1_0
VO H2_1, H2_0, H2_0
VZERO H0_1
VZERO H1_1
VZERO H2_1
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
// H*[r**2, r]
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, T_9, T_10, H0_1, M5)
// set up [0, m0] limbs
SUB $1, R3
VLL R3, (R2), M0
ADD $1, R3
MOVBZ $1, R0
CMPBEQ R3, $16, 2(PC)
VLVGB R3, R0, M0
VZERO T_1
VZERO T_2
VZERO T_3
EXPACC2(M0, T_1, T_2, T_3, T_4, T_5, T_6)// limbs: [0, m]
CMPBNE R3, $16, 2(PC)
VLEIB $10, $1, T_3
// h+m0
VAQ H0_0, T_1, H0_0
VAQ H1_0, T_2, H1_0
VAQ H2_0, T_3, H2_0
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, T_9, T_10, H0_1, M5)
BR next
square:
// setup [r²,r]
VSLDB $8, R_0, R_0, R_0
VSLDB $8, R_1, R_1, R_1
VSLDB $8, R_2, R_2, R_2
VSLDB $8, R5_1, R5_1, R5_1
VSLDB $8, R5_2, R5_2, R5_2
VLVGG $1, RSAVE_0, R_0
VLVGG $1, RSAVE_1, R_1
VLVGG $1, RSAVE_2, R_2
VLVGG $1, R5SAVE_1, R5_1
VLVGG $1, R5SAVE_2, R5_2
// setup [h0, h1]
VSLDB $8, H0_0, H0_0, H0_0
VSLDB $8, H1_0, H1_0, H1_0
VSLDB $8, H2_0, H2_0, H2_0
VO H0_1, H0_0, H0_0
VO H1_1, H1_0, H1_0
VO H2_1, H2_0, H2_0
VZERO H0_1
VZERO H1_1
VZERO H2_1
VZERO M0
VZERO M1
VZERO M2
VZERO M3
VZERO M4
VZERO M5
// (h0*r**2) + (h1*r)
MULTIPLY(H0_0, H1_0, H2_0, H0_1, H1_1, H2_1, R_0, R_1, R_2, R5_1, R5_2, M0, M1, M2, M3, M4, M5, T_0, T_1, T_2, T_3, T_4, T_5, T_6, T_7, T_8, T_9)
REDUCE2(H0_0, H1_0, H2_0, M0, M1, M2, M3, M4, T_9, T_10, H0_1, M5)
BR next

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. // AddedKey describes an SSH key to be added to an Agent.
type AddedKey struct { type AddedKey struct {
// PrivateKey must be a *rsa.PrivateKey, *dsa.PrivateKey or // PrivateKey must be a *rsa.PrivateKey, *dsa.PrivateKey,
// *ecdsa.PrivateKey, which will be inserted into the agent. // ed25519.PrivateKey or *ecdsa.PrivateKey, which will be inserted into the
// agent.
PrivateKey interface{} PrivateKey interface{}
// Certificate, if not nil, is communicated to the agent and will be // Certificate, if not nil, is communicated to the agent and will be
// stored with the key. // stored with the key.
@ -566,6 +567,17 @@ func (c *client) insertKey(s interface{}, comment string, constraints []byte) er
Comments: comment, Comments: comment,
Constraints: constraints, 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: case *ed25519.PrivateKey:
req = ssh.Marshal(ed25519KeyMsg{ req = ssh.Marshal(ed25519KeyMsg{
Type: ssh.KeyAlgoED25519, Type: ssh.KeyAlgoED25519,
@ -683,6 +695,18 @@ func (c *client) insertCert(s interface{}, cert *ssh.Certificate, comment string
Comments: comment, Comments: comment,
Constraints: constraints, 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: case *ed25519.PrivateKey:
req = ssh.Marshal(ed25519CertMsg{ req = ssh.Marshal(ed25519CertMsg{
Type: cert.Type(), Type: cert.Type(),

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

@ -414,8 +414,8 @@ func (c *CertChecker) CheckCert(principal string, cert *Certificate) error {
return nil return nil
} }
// SignCert sets c.SignatureKey to the authority's public key and stores a // SignCert signs the certificate with an authority, setting the Nonce,
// Signature, by authority, in the certificate. // SignatureKey, and Signature fields.
func (c *Certificate) SignCert(rand io.Reader, authority Signer) error { func (c *Certificate) SignCert(rand io.Reader, authority Signer) error {
c.Nonce = make([]byte, 32) c.Nonce = make([]byte, 32)
if _, err := io.ReadFull(rand, c.Nonce); err != nil { if _, err := io.ReadFull(rand, c.Nonce); err != nil {

2
vendor/golang.org/x/crypto/ssh/cipher.go generated vendored
View File

@ -119,7 +119,7 @@ var cipherModes = map[string]*cipherMode{
chacha20Poly1305ID: {64, 0, newChaCha20Cipher}, chacha20Poly1305ID: {64, 0, newChaCha20Cipher},
// CBC mode is insecure and so is not included in the default config. // 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. // needed, it's possible to specify a custom Config to enable it.
// You should expect that an active attacker can recover plaintext if // You should expect that an active attacker can recover plaintext if
// you do. // you do.

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]
}
}

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

@ -572,7 +572,7 @@ func (gex *dhGEXSHA) diffieHellman(theirPublic, myPrivate *big.Int) (*big.Int, e
return new(big.Int).Exp(theirPublic, myPrivate, gex.p), nil return new(big.Int).Exp(theirPublic, myPrivate, gex.p), nil
} }
func (gex *dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshakeMagics) (*kexResult, error) { func (gex dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshakeMagics) (*kexResult, error) {
// Send GexRequest // Send GexRequest
kexDHGexRequest := kexDHGexRequestMsg{ kexDHGexRequest := kexDHGexRequestMsg{
MinBits: dhGroupExchangeMinimumBits, MinBits: dhGroupExchangeMinimumBits,
@ -677,7 +677,7 @@ func (gex *dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshak
// Server half implementation of the Diffie Hellman Key Exchange with SHA1 and SHA256. // Server half implementation of the Diffie Hellman Key Exchange with SHA1 and SHA256.
// //
// This is a minimal implementation to satisfy the automated tests. // 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) { func (gex dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshakeMagics, priv Signer) (result *kexResult, err error) {
// Receive GexRequest // Receive GexRequest
packet, err := c.readPacket() packet, err := c.readPacket()
if err != nil { if err != nil {

246
vendor/golang.org/x/crypto/ssh/keys.go generated vendored
View File

@ -7,6 +7,8 @@ package ssh
import ( import (
"bytes" "bytes"
"crypto" "crypto"
"crypto/aes"
"crypto/cipher"
"crypto/dsa" "crypto/dsa"
"crypto/ecdsa" "crypto/ecdsa"
"crypto/elliptic" "crypto/elliptic"
@ -25,6 +27,7 @@ import (
"strings" "strings"
"golang.org/x/crypto/ed25519" "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 // These constants represent the algorithm names for key types supported by this
@ -559,9 +562,11 @@ func parseED25519(in []byte) (out PublicKey, rest []byte, err error) {
return nil, nil, err 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 { func (k ed25519PublicKey) Marshal() []byte {
@ -579,9 +584,11 @@ func (k ed25519PublicKey) Verify(b []byte, sig *Signature) error {
if sig.Format != k.Type() { if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", 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(ed25519.PublicKey(k), b, sig.Blob); !ok {
if ok := ed25519.Verify(edKey, b, sig.Blob); !ok {
return errors.New("ssh: signature did not verify") return errors.New("ssh: signature did not verify")
} }
@ -835,6 +842,10 @@ func parseSKEd25519(in []byte) (out PublicKey, rest []byte, err error) {
return nil, nil, err 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 := new(skEd25519PublicKey)
key.application = w.Application key.application = w.Application
key.PublicKey = ed25519.PublicKey(w.KeyBytes) key.PublicKey = ed25519.PublicKey(w.KeyBytes)
@ -859,6 +870,9 @@ func (k *skEd25519PublicKey) Verify(data []byte, sig *Signature) error {
if sig.Format != k.Type() { if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", 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 := sha256.New()
h.Write([]byte(k.application)) h.Write([]byte(k.application))
@ -895,8 +909,7 @@ func (k *skEd25519PublicKey) Verify(data []byte, sig *Signature) error {
original := Marshal(blob) original := Marshal(blob)
edKey := (ed25519.PublicKey)(k.PublicKey) if ok := ed25519.Verify(k.PublicKey, original, edSig.Signature); !ok {
if ok := ed25519.Verify(edKey, original, edSig.Signature); !ok {
return errors.New("ssh: signature did not verify") return errors.New("ssh: signature did not verify")
} }
@ -1048,14 +1061,18 @@ func NewPublicKey(key interface{}) (PublicKey, error) {
case *dsa.PublicKey: case *dsa.PublicKey:
return (*dsaPublicKey)(key), nil return (*dsaPublicKey)(key), nil
case ed25519.PublicKey: 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: default:
return nil, fmt.Errorf("ssh: unsupported key type %T", key) return nil, fmt.Errorf("ssh: unsupported key type %T", key)
} }
} }
// ParsePrivateKey returns a Signer from a PEM encoded private key. It supports // 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) { func ParsePrivateKey(pemBytes []byte) (Signer, error) {
key, err := ParseRawPrivateKey(pemBytes) key, err := ParseRawPrivateKey(pemBytes)
if err != nil { if err != nil {
@ -1068,8 +1085,8 @@ func ParsePrivateKey(pemBytes []byte) (Signer, error) {
// ParsePrivateKeyWithPassphrase returns a Signer from a PEM encoded private // ParsePrivateKeyWithPassphrase returns a Signer from a PEM encoded private
// key and passphrase. It supports the same keys as // key and passphrase. It supports the same keys as
// ParseRawPrivateKeyWithPassphrase. // ParseRawPrivateKeyWithPassphrase.
func ParsePrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (Signer, error) { func ParsePrivateKeyWithPassphrase(pemBytes, passphrase []byte) (Signer, error) {
key, err := ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase) key, err := ParseRawPrivateKeyWithPassphrase(pemBytes, passphrase)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -1085,8 +1102,21 @@ func encryptedBlock(block *pem.Block) bool {
return strings.Contains(block.Headers["Proc-Type"], "ENCRYPTED") 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 // 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) { func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
block, _ := pem.Decode(pemBytes) block, _ := pem.Decode(pemBytes)
if block == nil { if block == nil {
@ -1094,7 +1124,7 @@ func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
} }
if encryptedBlock(block) { if encryptedBlock(block) {
return nil, errors.New("ssh: cannot decode encrypted private keys") return nil, &PassphraseMissingError{}
} }
switch block.Type { switch block.Type {
@ -1108,34 +1138,36 @@ func ParseRawPrivateKey(pemBytes []byte) (interface{}, error) {
case "DSA PRIVATE KEY": case "DSA PRIVATE KEY":
return ParseDSAPrivateKey(block.Bytes) return ParseDSAPrivateKey(block.Bytes)
case "OPENSSH PRIVATE KEY": case "OPENSSH PRIVATE KEY":
return parseOpenSSHPrivateKey(block.Bytes) return parseOpenSSHPrivateKey(block.Bytes, unencryptedOpenSSHKey)
default: default:
return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type) return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type)
} }
} }
// ParseRawPrivateKeyWithPassphrase returns a private key decrypted with // ParseRawPrivateKeyWithPassphrase returns a private key decrypted with
// passphrase from a PEM encoded private key. If wrong passphrase, return // passphrase from a PEM encoded private key. If the passphrase is wrong, it
// x509.IncorrectPasswordError. // will return x509.IncorrectPasswordError.
func ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (interface{}, error) { func ParseRawPrivateKeyWithPassphrase(pemBytes, passphrase []byte) (interface{}, error) {
block, _ := pem.Decode(pemBytes) block, _ := pem.Decode(pemBytes)
if block == nil { if block == nil {
return nil, errors.New("ssh: no key found") return nil, errors.New("ssh: no key found")
} }
buf := block.Bytes
if encryptedBlock(block) { if block.Type == "OPENSSH PRIVATE KEY" {
if x509.IsEncryptedPEMBlock(block) { return parseOpenSSHPrivateKey(block.Bytes, passphraseProtectedOpenSSHKey(passphrase))
var err error }
buf, err = x509.DecryptPEMBlock(block, 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 != nil {
if err == x509.IncorrectPasswordError { if err == x509.IncorrectPasswordError {
return nil, err return nil, err
} }
return nil, fmt.Errorf("ssh: cannot decode encrypted private keys: %v", err) return nil, fmt.Errorf("ssh: cannot decode encrypted private keys: %v", err)
} }
}
}
switch block.Type { switch block.Type {
case "RSA PRIVATE KEY": case "RSA PRIVATE KEY":
@ -1144,8 +1176,6 @@ func ParseRawPrivateKeyWithPassphrase(pemBytes, passPhrase []byte) (interface{},
return x509.ParseECPrivateKey(buf) return x509.ParseECPrivateKey(buf)
case "DSA PRIVATE KEY": case "DSA PRIVATE KEY":
return ParseDSAPrivateKey(buf) return ParseDSAPrivateKey(buf)
case "OPENSSH PRIVATE KEY":
return parseOpenSSHPrivateKey(buf)
default: default:
return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type) return nil, fmt.Errorf("ssh: unsupported key type %q", block.Type)
} }
@ -1183,9 +1213,68 @@ func ParseDSAPrivateKey(der []byte) (*dsa.PrivateKey, error) {
}, nil }, nil
} }
// Implemented based on the documentation at func unencryptedOpenSSHKey(cipherName, kdfName, kdfOpts string, privKeyBlock []byte) ([]byte, error) {
// https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key if kdfName != "none" || cipherName != "none" {
func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) { 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" const magic = "openssh-key-v1\x00"
if len(key) < len(magic) || string(key[:len(magic)]) != magic { if len(key) < len(magic) || string(key[:len(magic)]) != magic {
return nil, errors.New("ssh: invalid openssh private key format") return nil, errors.New("ssh: invalid openssh private key format")
@ -1204,9 +1293,22 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
if err := Unmarshal(remaining, &w); err != nil { if err := Unmarshal(remaining, &w); err != nil {
return nil, err 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" { privKeyBlock, err := decrypt(w.CipherName, w.KdfName, w.KdfOpts, w.PrivKeyBlock)
return nil, errors.New("ssh: cannot decode encrypted private keys") 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 { pk1 := struct {
@ -1216,15 +1318,13 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
Rest []byte `ssh:"rest"` Rest []byte `ssh:"rest"`
}{} }{}
if err := Unmarshal(w.PrivKeyBlock, &pk1); err != nil { if err := Unmarshal(privKeyBlock, &pk1); err != nil || pk1.Check1 != pk1.Check2 {
return nil, err 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 { switch pk1.Keytype {
case KeyAlgoRSA: case KeyAlgoRSA:
// https://github.com/openssh/openssh-portable/blob/master/sshkey.c#L2760-L2773 // https://github.com/openssh/openssh-portable/blob/master/sshkey.c#L2760-L2773
@ -1243,10 +1343,8 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
return nil, err return nil, err
} }
for i, b := range key.Pad { if err := checkOpenSSHKeyPadding(key.Pad); err != nil {
if int(b) != i+1 { return nil, err
return nil, errors.New("ssh: padding not as expected")
}
} }
pk := &rsa.PrivateKey{ pk := &rsa.PrivateKey{
@ -1281,20 +1379,78 @@ func parseOpenSSHPrivateKey(key []byte) (crypto.PrivateKey, error) {
return nil, errors.New("ssh: private key unexpected length") return nil, errors.New("ssh: private key unexpected length")
} }
for i, b := range key.Pad { if err := checkOpenSSHKeyPadding(key.Pad); err != nil {
if int(b) != i+1 { return nil, err
return nil, errors.New("ssh: padding not as expected")
}
} }
pk := ed25519.PrivateKey(make([]byte, ed25519.PrivateKeySize)) pk := ed25519.PrivateKey(make([]byte, ed25519.PrivateKeySize))
copy(pk, key.Priv) copy(pk, key.Priv)
return &pk, nil 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: default:
return nil, errors.New("ssh: unhandled key type") 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 // FingerprintLegacyMD5 returns the user presentation of the key's
// fingerprint as described by RFC 4716 section 4. // fingerprint as described by RFC 4716 section 4.
func FingerprintLegacyMD5(pubKey PublicKey) string { func FingerprintLegacyMD5(pubKey PublicKey) string {

3
vendor/modules.txt vendored
View File

@ -618,7 +618,7 @@ go.opencensus.io/trace/tracestate
## explicit ## explicit
# go.uber.org/zap v1.9.1 # go.uber.org/zap v1.9.1
## explicit ## explicit
# golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e # golang.org/x/crypto v0.0.0-20200510223506-06a226fb4e37
## explicit ## explicit
golang.org/x/crypto/bcrypt golang.org/x/crypto/bcrypt
golang.org/x/crypto/blowfish golang.org/x/crypto/blowfish
@ -640,6 +640,7 @@ golang.org/x/crypto/pkcs12/internal/rc2
golang.org/x/crypto/poly1305 golang.org/x/crypto/poly1305
golang.org/x/crypto/ssh golang.org/x/crypto/ssh
golang.org/x/crypto/ssh/agent golang.org/x/crypto/ssh/agent
golang.org/x/crypto/ssh/internal/bcrypt_pbkdf
golang.org/x/crypto/ssh/knownhosts golang.org/x/crypto/ssh/knownhosts
# golang.org/x/mod v0.2.0 # golang.org/x/mod v0.2.0
## explicit ## explicit