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vendor: upgrade "golang.org/x/crypto"

Browse Source 
Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyuho Lee 2018-06-13 10:14:36 -07:00
parent 8cedb48570
commit 955e1c4467
22 changed files with 594 additions and 359 deletions
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3
Gopkg.lock generated
View File

@ -264,13 +264,14 @@
version = "v1.8.0"
[[projects]]
branch = "master"
name = "golang.org/x/crypto"
packages = [
"bcrypt",
"blowfish",
"ssh/terminal"
]
revision = "9419663f5a44be8b34ca85f08abc5fe1be11f8a3"
revision = "8ac0e0d97ce45cd83d1d7243c060cb8461dda5e9"
[[projects]]
name = "golang.org/x/net"

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

@ -241,11 +241,11 @@ func (p *hashed) Hash() []byte {
n = 3
}
arr[n] = '$'
n += 1
n++
copy(arr[n:], []byte(fmt.Sprintf("%02d", p.cost)))
n += 2
arr[n] = '$'
n += 1
n++
copy(arr[n:], p.salt)
n += encodedSaltSize
copy(arr[n:], p.hash)

8
vendor/golang.org/x/crypto/ssh/certs.go generated vendored
View File

@ -44,7 +44,9 @@ type Signature struct {
const CertTimeInfinity = 1<<64 - 1
// An Certificate represents an OpenSSH certificate as defined in
// [PROTOCOL.certkeys]?rev=1.8.
// [PROTOCOL.certkeys]?rev=1.8. The Certificate type implements the
// PublicKey interface, so it can be unmarshaled using
// ParsePublicKey.
type Certificate struct {
Nonce []byte
Key PublicKey
@ -340,10 +342,10 @@ func (c *CertChecker) Authenticate(conn ConnMetadata, pubKey PublicKey) (*Permis
// the signature of the certificate.
func (c *CertChecker) CheckCert(principal string, cert *Certificate) error {
if c.IsRevoked != nil && c.IsRevoked(cert) {
return fmt.Errorf("ssh: certicate serial %d revoked", cert.Serial)
return fmt.Errorf("ssh: certificate serial %d revoked", cert.Serial)
}
for opt, _ := range cert.CriticalOptions {
for opt := range cert.CriticalOptions {
// sourceAddressCriticalOption will be enforced by
// serverAuthenticate
if opt == sourceAddressCriticalOption {

142
vendor/golang.org/x/crypto/ssh/channel.go generated vendored
View File

@ -205,32 +205,32 @@ type channel struct {
// writePacket sends a packet. If the packet is a channel close, it updates
// sentClose. This method takes the lock c.writeMu.
func (c *channel) writePacket(packet []byte) error {
c.writeMu.Lock()
if c.sentClose {
c.writeMu.Unlock()
func (ch *channel) writePacket(packet []byte) error {
ch.writeMu.Lock()
if ch.sentClose {
ch.writeMu.Unlock()
return io.EOF
}
c.sentClose = (packet[0] == msgChannelClose)
err := c.mux.conn.writePacket(packet)
c.writeMu.Unlock()
ch.sentClose = (packet[0] == msgChannelClose)
err := ch.mux.conn.writePacket(packet)
ch.writeMu.Unlock()
return err
}
func (c *channel) sendMessage(msg interface{}) error {
func (ch *channel) sendMessage(msg interface{}) error {
if debugMux {
log.Printf("send(%d): %#v", c.mux.chanList.offset, msg)
log.Printf("send(%d): %#v", ch.mux.chanList.offset, msg)
}
p := Marshal(msg)
binary.BigEndian.PutUint32(p[1:], c.remoteId)
return c.writePacket(p)
binary.BigEndian.PutUint32(p[1:], ch.remoteId)
return ch.writePacket(p)
}
// WriteExtended writes data to a specific extended stream. These streams are
// used, for example, for stderr.
func (c *channel) WriteExtended(data []byte, extendedCode uint32) (n int, err error) {
if c.sentEOF {
func (ch *channel) WriteExtended(data []byte, extendedCode uint32) (n int, err error) {
if ch.sentEOF {
return 0, io.EOF
}
// 1 byte message type, 4 bytes remoteId, 4 bytes data length
@ -241,16 +241,16 @@ func (c *channel) WriteExtended(data []byte, extendedCode uint32) (n int, err er
opCode = msgChannelExtendedData
}
c.writeMu.Lock()
packet := c.packetPool[extendedCode]
ch.writeMu.Lock()
packet := ch.packetPool[extendedCode]
// We don't remove the buffer from packetPool, so
// WriteExtended calls from different goroutines will be
// flagged as errors by the race detector.
c.writeMu.Unlock()
ch.writeMu.Unlock()
for len(data) > 0 {
space := min(c.maxRemotePayload, len(data))
if space, err = c.remoteWin.reserve(space); err != nil {
space := min(ch.maxRemotePayload, len(data))
if space, err = ch.remoteWin.reserve(space); err != nil {
return n, err
}
if want := headerLength + space; uint32(cap(packet)) < want {
@ -262,13 +262,13 @@ func (c *channel) WriteExtended(data []byte, extendedCode uint32) (n int, err er
todo := data[:space]
packet[0] = opCode
binary.BigEndian.PutUint32(packet[1:], c.remoteId)
binary.BigEndian.PutUint32(packet[1:], ch.remoteId)
if extendedCode > 0 {
binary.BigEndian.PutUint32(packet[5:], uint32(extendedCode))
}
binary.BigEndian.PutUint32(packet[headerLength-4:], uint32(len(todo)))
copy(packet[headerLength:], todo)
if err = c.writePacket(packet); err != nil {
if err = ch.writePacket(packet); err != nil {
return n, err
}
@ -276,14 +276,14 @@ func (c *channel) WriteExtended(data []byte, extendedCode uint32) (n int, err er
data = data[len(todo):]
}
c.writeMu.Lock()
c.packetPool[extendedCode] = packet
c.writeMu.Unlock()
ch.writeMu.Lock()
ch.packetPool[extendedCode] = packet
ch.writeMu.Unlock()
return n, err
}
func (c *channel) handleData(packet []byte) error {
func (ch *channel) handleData(packet []byte) error {
headerLen := 9
isExtendedData := packet[0] == msgChannelExtendedData
if isExtendedData {
@ -303,7 +303,7 @@ func (c *channel) handleData(packet []byte) error {
if length == 0 {
return nil
}
if length > c.maxIncomingPayload {
if length > ch.maxIncomingPayload {
// TODO(hanwen): should send Disconnect?
return errors.New("ssh: incoming packet exceeds maximum payload size")
}
@ -313,21 +313,21 @@ func (c *channel) handleData(packet []byte) error {
return errors.New("ssh: wrong packet length")
}
c.windowMu.Lock()
if c.myWindow < length {
c.windowMu.Unlock()
ch.windowMu.Lock()
if ch.myWindow < length {
ch.windowMu.Unlock()
// TODO(hanwen): should send Disconnect with reason?
return errors.New("ssh: remote side wrote too much")
}
c.myWindow -= length
c.windowMu.Unlock()
ch.myWindow -= length
ch.windowMu.Unlock()
if extended == 1 {
c.extPending.write(data)
ch.extPending.write(data)
} else if extended > 0 {
// discard other extended data.
} else {
c.pending.write(data)
ch.pending.write(data)
}
return nil
}
@ -384,31 +384,31 @@ func (c *channel) close() {
// responseMessageReceived is called when a success or failure message is
// received on a channel to check that such a message is reasonable for the
// given channel.
func (c *channel) responseMessageReceived() error {
if c.direction == channelInbound {
func (ch *channel) responseMessageReceived() error {
if ch.direction == channelInbound {
return errors.New("ssh: channel response message received on inbound channel")
}
if c.decided {
if ch.decided {
return errors.New("ssh: duplicate response received for channel")
}
c.decided = true
ch.decided = true
return nil
}
func (c *channel) handlePacket(packet []byte) error {
func (ch *channel) handlePacket(packet []byte) error {
switch packet[0] {
case msgChannelData, msgChannelExtendedData:
return c.handleData(packet)
return ch.handleData(packet)
case msgChannelClose:
c.sendMessage(channelCloseMsg{PeersId: c.remoteId})
c.mux.chanList.remove(c.localId)
c.close()
ch.sendMessage(channelCloseMsg{PeersID: ch.remoteId})
ch.mux.chanList.remove(ch.localId)
ch.close()
return nil
case msgChannelEOF:
// RFC 4254 is mute on how EOF affects dataExt messages but
// it is logical to signal EOF at the same time.
c.extPending.eof()
c.pending.eof()
ch.extPending.eof()
ch.pending.eof()
return nil
}
@ -419,24 +419,24 @@ func (c *channel) handlePacket(packet []byte) error {
switch msg := decoded.(type) {
case *channelOpenFailureMsg:
if err := c.responseMessageReceived(); err != nil {
if err := ch.responseMessageReceived(); err != nil {
return err
}
c.mux.chanList.remove(msg.PeersId)
c.msg <- msg
ch.mux.chanList.remove(msg.PeersID)
ch.msg <- msg
case *channelOpenConfirmMsg:
if err := c.responseMessageReceived(); err != nil {
if err := ch.responseMessageReceived(); err != nil {
return err
}
if msg.MaxPacketSize < minPacketLength || msg.MaxPacketSize > 1<<31 {
return fmt.Errorf("ssh: invalid MaxPacketSize %d from peer", msg.MaxPacketSize)
}
c.remoteId = msg.MyId
c.maxRemotePayload = msg.MaxPacketSize
c.remoteWin.add(msg.MyWindow)
c.msg <- msg
ch.remoteId = msg.MyID
ch.maxRemotePayload = msg.MaxPacketSize
ch.remoteWin.add(msg.MyWindow)
ch.msg <- msg
case *windowAdjustMsg:
if !c.remoteWin.add(msg.AdditionalBytes) {
if !ch.remoteWin.add(msg.AdditionalBytes) {
return fmt.Errorf("ssh: invalid window update for %d bytes", msg.AdditionalBytes)
}
case *channelRequestMsg:
@ -444,12 +444,12 @@ func (c *channel) handlePacket(packet []byte) error {
Type: msg.Request,
WantReply: msg.WantReply,
Payload: msg.RequestSpecificData,
ch: c,
ch: ch,
}
c.incomingRequests <- &req
ch.incomingRequests <- &req
default:
c.msg <- msg
ch.msg <- msg
}
return nil
}
@ -488,23 +488,23 @@ func (e *extChannel) Read(data []byte) (n int, err error) {
return e.ch.ReadExtended(data, e.code)
}
func (c *channel) Accept() (Channel, <-chan *Request, error) {
if c.decided {
func (ch *channel) Accept() (Channel, <-chan *Request, error) {
if ch.decided {
return nil, nil, errDecidedAlready
}
c.maxIncomingPayload = channelMaxPacket
ch.maxIncomingPayload = channelMaxPacket
confirm := channelOpenConfirmMsg{
PeersId: c.remoteId,
MyId: c.localId,
MyWindow: c.myWindow,
MaxPacketSize: c.maxIncomingPayload,
PeersID: ch.remoteId,
MyID: ch.localId,
MyWindow: ch.myWindow,
MaxPacketSize: ch.maxIncomingPayload,
}
c.decided = true
if err := c.sendMessage(confirm); err != nil {
ch.decided = true
if err := ch.sendMessage(confirm); err != nil {
return nil, nil, err
}
return c, c.incomingRequests, nil
return ch, ch.incomingRequests, nil
}
func (ch *channel) Reject(reason RejectionReason, message string) error {
@ -512,7 +512,7 @@ func (ch *channel) Reject(reason RejectionReason, message string) error {
return errDecidedAlready
}
reject := channelOpenFailureMsg{
PeersId: ch.remoteId,
PeersID: ch.remoteId,
Reason: reason,
Message: message,
Language: "en",
@ -541,7 +541,7 @@ func (ch *channel) CloseWrite() error {
}
ch.sentEOF = true
return ch.sendMessage(channelEOFMsg{
PeersId: ch.remoteId})
PeersID: ch.remoteId})
}
func (ch *channel) Close() error {
@ -550,7 +550,7 @@ func (ch *channel) Close() error {
}
return ch.sendMessage(channelCloseMsg{
PeersId: ch.remoteId})
PeersID: ch.remoteId})
}
// Extended returns an io.ReadWriter that sends and receives data on the given,
@ -577,7 +577,7 @@ func (ch *channel) SendRequest(name string, wantReply bool, payload []byte) (boo
}
msg := channelRequestMsg{
PeersId: ch.remoteId,
PeersID: ch.remoteId,
Request: name,
WantReply: wantReply,
RequestSpecificData: payload,
@ -614,11 +614,11 @@ func (ch *channel) ackRequest(ok bool) error {
var msg interface{}
if !ok {
msg = channelRequestFailureMsg{
PeersId: ch.remoteId,
PeersID: ch.remoteId,
}
} else {
msg = channelRequestSuccessMsg{
PeersId: ch.remoteId,
PeersID: ch.remoteId,
}
}
return ch.sendMessage(msg)

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

@ -16,6 +16,10 @@ import (
"hash"
"io"
"io/ioutil"
"math/bits"
"golang.org/x/crypto/internal/chacha20"
"golang.org/x/crypto/poly1305"
)
const (
@ -53,78 +57,78 @@ func newRC4(key, iv []byte) (cipher.Stream, error) {
return rc4.NewCipher(key)
}
type streamCipherMode struct {
keySize int
ivSize int
skip int
createFunc func(key, iv []byte) (cipher.Stream, error)
type cipherMode struct {
keySize int
ivSize int
create func(key, iv []byte, macKey []byte, algs directionAlgorithms) (packetCipher, error)
}
func (c *streamCipherMode) createStream(key, iv []byte) (cipher.Stream, error) {
if len(key) < c.keySize {
panic("ssh: key length too small for cipher")
}
if len(iv) < c.ivSize {
panic("ssh: iv too small for cipher")
}
stream, err := c.createFunc(key[:c.keySize], iv[:c.ivSize])
if err != nil {
return nil, err
}
var streamDump []byte
if c.skip > 0 {
streamDump = make([]byte, 512)
}
for remainingToDump := c.skip; remainingToDump > 0; {
dumpThisTime := remainingToDump
if dumpThisTime > len(streamDump) {
dumpThisTime = len(streamDump)
func streamCipherMode(skip int, createFunc func(key, iv []byte) (cipher.Stream, error)) func(key, iv []byte, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
return func(key, iv, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
stream, err := createFunc(key, iv)
if err != nil {
return nil, err
}
stream.XORKeyStream(streamDump[:dumpThisTime], streamDump[:dumpThisTime])
remainingToDump -= dumpThisTime
}
return stream, nil
var streamDump []byte
if skip > 0 {
streamDump = make([]byte, 512)
}
for remainingToDump := skip; remainingToDump > 0; {
dumpThisTime := remainingToDump
if dumpThisTime > len(streamDump) {
dumpThisTime = len(streamDump)
}
stream.XORKeyStream(streamDump[:dumpThisTime], streamDump[:dumpThisTime])
remainingToDump -= dumpThisTime
}
mac := macModes[algs.MAC].new(macKey)
return &streamPacketCipher{
mac: mac,
etm: macModes[algs.MAC].etm,
macResult: make([]byte, mac.Size()),
cipher: stream,
}, nil
}
}
// cipherModes documents properties of supported ciphers. Ciphers not included
// are not supported and will not be negotiated, even if explicitly requested in
// ClientConfig.Crypto.Ciphers.
var cipherModes = map[string]*streamCipherMode{
var cipherModes = map[string]*cipherMode{
// Ciphers from RFC4344, which introduced many CTR-based ciphers. Algorithms
// are defined in the order specified in the RFC.
"aes128-ctr": {16, aes.BlockSize, 0, newAESCTR},
"aes192-ctr": {24, aes.BlockSize, 0, newAESCTR},
"aes256-ctr": {32, aes.BlockSize, 0, newAESCTR},
"aes128-ctr": {16, aes.BlockSize, streamCipherMode(0, newAESCTR)},
"aes192-ctr": {24, aes.BlockSize, streamCipherMode(0, newAESCTR)},
"aes256-ctr": {32, aes.BlockSize, streamCipherMode(0, newAESCTR)},
// Ciphers from RFC4345, which introduces security-improved arcfour ciphers.
// They are defined in the order specified in the RFC.
"arcfour128": {16, 0, 1536, newRC4},
"arcfour256": {32, 0, 1536, newRC4},
"arcfour128": {16, 0, streamCipherMode(1536, newRC4)},
"arcfour256": {32, 0, streamCipherMode(1536, newRC4)},
// Cipher defined in RFC 4253, which describes SSH Transport Layer Protocol.
// Note that this cipher is not safe, as stated in RFC 4253: "Arcfour (and
// RC4) has problems with weak keys, and should be used with caution."
// RFC4345 introduces improved versions of Arcfour.
"arcfour": {16, 0, 0, newRC4},
"arcfour": {16, 0, streamCipherMode(0, newRC4)},
// AES-GCM is not a stream cipher, so it is constructed with a
// special case. If we add any more non-stream ciphers, we
// should invest a cleaner way to do this.
gcmCipherID: {16, 12, 0, nil},
// AEAD ciphers
gcmCipherID: {16, 12, newGCMCipher},
chacha20Poly1305ID: {64, 0, newChaCha20Cipher},
// CBC mode is insecure and so is not included in the default config.
// (See http://www.isg.rhul.ac.uk/~kp/SandPfinal.pdf). If absolutely
// needed, it's possible to specify a custom Config to enable it.
// You should expect that an active attacker can recover plaintext if
// you do.
aes128cbcID: {16, aes.BlockSize, 0, nil},
aes128cbcID: {16, aes.BlockSize, newAESCBCCipher},
// 3des-cbc is insecure and is disabled by default.
tripledescbcID: {24, des.BlockSize, 0, nil},
// 3des-cbc is insecure and is not included in the default
// config.
tripledescbcID: {24, des.BlockSize, newTripleDESCBCCipher},
}
// prefixLen is the length of the packet prefix that contains the packet length
@ -304,7 +308,7 @@ type gcmCipher struct {
buf []byte
}
func newGCMCipher(iv, key, macKey []byte) (packetCipher, error) {
func newGCMCipher(key, iv, unusedMacKey []byte, unusedAlgs directionAlgorithms) (packetCipher, error) {
c, err := aes.NewCipher(key)
if err != nil {
return nil, err
@ -372,7 +376,7 @@ func (c *gcmCipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
}
length := binary.BigEndian.Uint32(c.prefix[:])
if length > maxPacket {
return nil, errors.New("ssh: max packet length exceeded.")
return nil, errors.New("ssh: max packet length exceeded")
}
if cap(c.buf) < int(length+gcmTagSize) {
@ -422,7 +426,7 @@ type cbcCipher struct {
oracleCamouflage uint32
}
func newCBCCipher(c cipher.Block, iv, key, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
func newCBCCipher(c cipher.Block, key, iv, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
cbc := &cbcCipher{
mac: macModes[algs.MAC].new(macKey),
decrypter: cipher.NewCBCDecrypter(c, iv),
@ -436,13 +440,13 @@ func newCBCCipher(c cipher.Block, iv, key, macKey []byte, algs directionAlgorith
return cbc, nil
}
func newAESCBCCipher(iv, key, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
func newAESCBCCipher(key, iv, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
c, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
cbc, err := newCBCCipher(c, iv, key, macKey, algs)
cbc, err := newCBCCipher(c, key, iv, macKey, algs)
if err != nil {
return nil, err
}
@ -450,13 +454,13 @@ func newAESCBCCipher(iv, key, macKey []byte, algs directionAlgorithms) (packetCi
return cbc, nil
}
func newTripleDESCBCCipher(iv, key, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
func newTripleDESCBCCipher(key, iv, macKey []byte, algs directionAlgorithms) (packetCipher, error) {
c, err := des.NewTripleDESCipher(key)
if err != nil {
return nil, err
}
cbc, err := newCBCCipher(c, iv, key, macKey, algs)
cbc, err := newCBCCipher(c, key, iv, macKey, algs)
if err != nil {
return nil, err
}
@ -548,11 +552,11 @@ func (c *cbcCipher) readPacketLeaky(seqNum uint32, r io.Reader) ([]byte, error)
c.packetData = c.packetData[:entirePacketSize]
}
if n, err := io.ReadFull(r, c.packetData[firstBlockLength:]); err != nil {
n, err := io.ReadFull(r, c.packetData[firstBlockLength:])
if err != nil {
return nil, err
} else {
c.oracleCamouflage -= uint32(n)
}
c.oracleCamouflage -= uint32(n)
remainingCrypted := c.packetData[firstBlockLength:macStart]
c.decrypter.CryptBlocks(remainingCrypted, remainingCrypted)
@ -627,3 +631,140 @@ func (c *cbcCipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, pack
return nil
}
const chacha20Poly1305ID = "chacha20-poly1305@openssh.com"
// chacha20Poly1305Cipher implements the chacha20-poly1305@openssh.com
// AEAD, which is described here:
//
// https://tools.ietf.org/html/draft-josefsson-ssh-chacha20-poly1305-openssh-00
//
// the methods here also implement padding, which RFC4253 Section 6
// also requires of stream ciphers.
type chacha20Poly1305Cipher struct {
lengthKey [8]uint32
contentKey [8]uint32
buf []byte
}
func newChaCha20Cipher(key, unusedIV, unusedMACKey []byte, unusedAlgs directionAlgorithms) (packetCipher, error) {
if len(key) != 64 {
panic(len(key))
}
c := &chacha20Poly1305Cipher{
buf: make([]byte, 256),
}
for i := range c.contentKey {
c.contentKey[i] = binary.LittleEndian.Uint32(key[i*4 : (i+1)*4])
}
for i := range c.lengthKey {
c.lengthKey[i] = binary.LittleEndian.Uint32(key[(i+8)*4 : (i+9)*4])
}
return c, nil
}
func (c *chacha20Poly1305Cipher) readPacket(seqNum uint32, r io.Reader) ([]byte, error) {
nonce := [3]uint32{0, 0, bits.ReverseBytes32(seqNum)}
s := chacha20.New(c.contentKey, nonce)
var polyKey [32]byte
s.XORKeyStream(polyKey[:], polyKey[:])
s.Advance() // skip next 32 bytes
encryptedLength := c.buf[:4]
if _, err := io.ReadFull(r, encryptedLength); err != nil {
return nil, err
}
var lenBytes [4]byte
chacha20.New(c.lengthKey, nonce).XORKeyStream(lenBytes[:], encryptedLength)
length := binary.BigEndian.Uint32(lenBytes[:])
if length > maxPacket {
return nil, errors.New("ssh: invalid packet length, packet too large")
}
contentEnd := 4 + length
packetEnd := contentEnd + poly1305.TagSize
if uint32(cap(c.buf)) < packetEnd {
c.buf = make([]byte, packetEnd)
copy(c.buf[:], encryptedLength)
} else {
c.buf = c.buf[:packetEnd]
}
if _, err := io.ReadFull(r, c.buf[4:packetEnd]); err != nil {
return nil, err
}
var mac [poly1305.TagSize]byte
copy(mac[:], c.buf[contentEnd:packetEnd])
if !poly1305.Verify(&mac, c.buf[:contentEnd], &polyKey) {
return nil, errors.New("ssh: MAC failure")
}
plain := c.buf[4:contentEnd]
s.XORKeyStream(plain, plain)
padding := plain[0]
if padding < 4 {
// padding is a byte, so it automatically satisfies
// the maximum size, which is 255.
return nil, fmt.Errorf("ssh: illegal padding %d", padding)
}
if int(padding)+1 >= len(plain) {
return nil, fmt.Errorf("ssh: padding %d too large", padding)
}
plain = plain[1 : len(plain)-int(padding)]
return plain, nil
}
func (c *chacha20Poly1305Cipher) writePacket(seqNum uint32, w io.Writer, rand io.Reader, payload []byte) error {
nonce := [3]uint32{0, 0, bits.ReverseBytes32(seqNum)}
s := chacha20.New(c.contentKey, nonce)
var polyKey [32]byte
s.XORKeyStream(polyKey[:], polyKey[:])
s.Advance() // skip next 32 bytes
// There is no blocksize, so fall back to multiple of 8 byte
// padding, as described in RFC 4253, Sec 6.
const packetSizeMultiple = 8
padding := packetSizeMultiple - (1+len(payload))%packetSizeMultiple
if padding < 4 {
padding += packetSizeMultiple
}
// size (4 bytes), padding (1), payload, padding, tag.
totalLength := 4 + 1 + len(payload) + padding + poly1305.TagSize
if cap(c.buf) < totalLength {
c.buf = make([]byte, totalLength)
} else {
c.buf = c.buf[:totalLength]
}
binary.BigEndian.PutUint32(c.buf, uint32(1+len(payload)+padding))
chacha20.New(c.lengthKey, nonce).XORKeyStream(c.buf, c.buf[:4])
c.buf[4] = byte(padding)
copy(c.buf[5:], payload)
packetEnd := 5 + len(payload) + padding
if _, err := io.ReadFull(rand, c.buf[5+len(payload):packetEnd]); err != nil {
return err
}
s.XORKeyStream(c.buf[4:], c.buf[4:packetEnd])
var mac [poly1305.TagSize]byte
poly1305.Sum(&mac, c.buf[:packetEnd], &polyKey)
copy(c.buf[packetEnd:], mac[:])
if _, err := w.Write(c.buf); err != nil {
return err
}
return nil
}

25
vendor/golang.org/x/crypto/ssh/client.go generated vendored
View File

@ -9,6 +9,7 @@ import (
"errors"
"fmt"
"net"
"os"
"sync"
"time"
)
@ -18,6 +19,8 @@ import (
type Client struct {
Conn
handleForwardsOnce sync.Once // guards calling (*Client).handleForwards
forwards forwardList // forwarded tcpip connections from the remote side
mu sync.Mutex
channelHandlers map[string]chan NewChannel
@ -59,8 +62,6 @@ func NewClient(c Conn, chans <-chan NewChannel, reqs <-chan *Request) *Client {
conn.Wait()
conn.forwards.closeAll()
}()
go conn.forwards.handleChannels(conn.HandleChannelOpen("forwarded-tcpip"))
go conn.forwards.handleChannels(conn.HandleChannelOpen("forwarded-streamlocal@openssh.com"))
return conn
}
@ -187,6 +188,10 @@ func Dial(network, addr string, config *ClientConfig) (*Client, error) {
// net.Conn underlying the the SSH connection.
type HostKeyCallback func(hostname string, remote net.Addr, key PublicKey) error
// BannerCallback is the function type used for treat the banner sent by
// the server. A BannerCallback receives the message sent by the remote server.
type BannerCallback func(message string) error
// A ClientConfig structure is used to configure a Client. It must not be
// modified after having been passed to an SSH function.
type ClientConfig struct {
@ -209,6 +214,12 @@ type ClientConfig struct {
// FixedHostKey can be used for simplistic host key checks.
HostKeyCallback HostKeyCallback
// BannerCallback is called during the SSH dance to display a custom
// server's message. The client configuration can supply this callback to
// handle it as wished. The function BannerDisplayStderr can be used for
// simplistic display on Stderr.
BannerCallback BannerCallback
// ClientVersion contains the version identification string that will
// be used for the connection. If empty, a reasonable default is used.
ClientVersion string
@ -255,3 +266,13 @@ func FixedHostKey(key PublicKey) HostKeyCallback {
hk := &fixedHostKey{key}
return hk.check
}
// BannerDisplayStderr returns a function that can be used for
// ClientConfig.BannerCallback to display banners on os.Stderr.
func BannerDisplayStderr() BannerCallback {
return func(banner string) error {
_, err := os.Stderr.WriteString(banner)
return err
}
}

121
vendor/golang.org/x/crypto/ssh/client_auth.go generated vendored
View File

@ -11,6 +11,14 @@ import (
"io"
)
type authResult int
const (
authFailure authResult = iota
authPartialSuccess
authSuccess
)
// clientAuthenticate authenticates with the remote server. See RFC 4252.
func (c *connection) clientAuthenticate(config *ClientConfig) error {
// initiate user auth session
@ -37,11 +45,12 @@ func (c *connection) clientAuthenticate(config *ClientConfig) error {
if err != nil {
return err
}
if ok {
if ok == authSuccess {
// success
return nil
} else if ok == authFailure {
tried[auth.method()] = true
}
tried[auth.method()] = true
if methods == nil {
methods = lastMethods
}
@ -82,7 +91,7 @@ type AuthMethod interface {
// If authentication is not successful, a []string of alternative
// method names is returned. If the slice is nil, it will be ignored
// and the previous set of possible methods will be reused.
auth(session []byte, user string, p packetConn, rand io.Reader) (bool, []string, error)
auth(session []byte, user string, p packetConn, rand io.Reader) (authResult, []string, error)
// method returns the RFC 4252 method name.
method() string
@ -91,13 +100,13 @@ type AuthMethod interface {
// "none" authentication, RFC 4252 section 5.2.
type noneAuth int
func (n *noneAuth) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) {
func (n *noneAuth) auth(session []byte, user string, c packetConn, rand io.Reader) (authResult, []string, error) {
if err := c.writePacket(Marshal(&userAuthRequestMsg{
User: user,
Service: serviceSSH,
Method: "none",
})); err != nil {
return false, nil, err
return authFailure, nil, err
}
return handleAuthResponse(c)
@ -111,7 +120,7 @@ func (n *noneAuth) method() string {
// a function call, e.g. by prompting the user.
type passwordCallback func() (password string, err error)
func (cb passwordCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) {
func (cb passwordCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (authResult, []string, error) {
type passwordAuthMsg struct {
User string `sshtype:"50"`
Service string
@ -125,7 +134,7 @@ func (cb passwordCallback) auth(session []byte, user string, c packetConn, rand
// The program may only find out that the user doesn't have a password
// when prompting.
if err != nil {
return false, nil, err
return authFailure, nil, err
}
if err := c.writePacket(Marshal(&passwordAuthMsg{
@ -135,7 +144,7 @@ func (cb passwordCallback) auth(session []byte, user string, c packetConn, rand
Reply: false,
Password: pw,
})); err != nil {
return false, nil, err
return authFailure, nil, err
}
return handleAuthResponse(c)
@ -178,7 +187,7 @@ func (cb publicKeyCallback) method() string {
return "publickey"
}
func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) {
func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand io.Reader) (authResult, []string, error) {
// Authentication is performed by sending an enquiry to test if a key is
// acceptable to the remote. If the key is acceptable, the client will
// attempt to authenticate with the valid key. If not the client will repeat
@ -186,13 +195,13 @@ func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand
signers, err := cb()
if err != nil {
return false, nil, err
return authFailure, nil, err
}
var methods []string
for _, signer := range signers {
ok, err := validateKey(signer.PublicKey(), user, c)
if err != nil {
return false, nil, err
return authFailure, nil, err
}
if !ok {
continue
@ -206,7 +215,7 @@ func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand
Method: cb.method(),
}, []byte(pub.Type()), pubKey))
if err != nil {
return false, nil, err
return authFailure, nil, err
}
// manually wrap the serialized signature in a string
@ -224,24 +233,24 @@ func (cb publicKeyCallback) auth(session []byte, user string, c packetConn, rand
}
p := Marshal(&msg)
if err := c.writePacket(p); err != nil {
return false, nil, err
return authFailure, nil, err
}
var success bool
var success authResult
success, methods, err = handleAuthResponse(c)
if err != nil {
return false, nil, err
return authFailure, nil, err
}
// If authentication succeeds or the list of available methods does not
// contain the "publickey" method, do not attempt to authenticate with any
// other keys. According to RFC 4252 Section 7, the latter can occur when
// additional authentication methods are required.
if success || !containsMethod(methods, cb.method()) {
if success == authSuccess || !containsMethod(methods, cb.method()) {
return success, methods, err
}
}
return false, methods, nil
return authFailure, methods, nil
}
func containsMethod(methods []string, method string) bool {
@ -283,7 +292,9 @@ func confirmKeyAck(key PublicKey, c packetConn) (bool, error) {
}
switch packet[0] {
case msgUserAuthBanner:
// TODO(gpaul): add callback to present the banner to the user
if err := handleBannerResponse(c, packet); err != nil {
return false, err
}
case msgUserAuthPubKeyOk:
var msg userAuthPubKeyOkMsg
if err := Unmarshal(packet, &msg); err != nil {
@ -316,30 +327,53 @@ func PublicKeysCallback(getSigners func() (signers []Signer, err error)) AuthMet
// handleAuthResponse returns whether the preceding authentication request succeeded
// along with a list of remaining authentication methods to try next and
// an error if an unexpected response was received.
func handleAuthResponse(c packetConn) (bool, []string, error) {
func handleAuthResponse(c packetConn) (authResult, []string, error) {
for {
packet, err := c.readPacket()
if err != nil {
return false, nil, err
return authFailure, nil, err
}
switch packet[0] {
case msgUserAuthBanner:
// TODO: add callback to present the banner to the user
if err := handleBannerResponse(c, packet); err != nil {
return authFailure, nil, err
}
case msgUserAuthFailure:
var msg userAuthFailureMsg
if err := Unmarshal(packet, &msg); err != nil {
return false, nil, err
return authFailure, nil, err
}
return false, msg.Methods, nil
if msg.PartialSuccess {
return authPartialSuccess, msg.Methods, nil
}
return authFailure, msg.Methods, nil
case msgUserAuthSuccess:
return true, nil, nil
return authSuccess, nil, nil
default:
return false, nil, unexpectedMessageError(msgUserAuthSuccess, packet[0])
return authFailure, nil, unexpectedMessageError(msgUserAuthSuccess, packet[0])
}
}
}
func handleBannerResponse(c packetConn, packet []byte) error {
var msg userAuthBannerMsg
if err := Unmarshal(packet, &msg); err != nil {
return err
}
transport, ok := c.(*handshakeTransport)
if !ok {
return nil
}
if transport.bannerCallback != nil {
return transport.bannerCallback(msg.Message)
}
return nil
}
// KeyboardInteractiveChallenge should print questions, optionally
// disabling echoing (e.g. for passwords), and return all the answers.
// Challenge may be called multiple times in a single session. After
@ -359,7 +393,7 @@ func (cb KeyboardInteractiveChallenge) method() string {
return "keyboard-interactive"
}
func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packetConn, rand io.Reader) (bool, []string, error) {
func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packetConn, rand io.Reader) (authResult, []string, error) {
type initiateMsg struct {
User string `sshtype:"50"`
Service string
@ -373,37 +407,42 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
Service: serviceSSH,
Method: "keyboard-interactive",
})); err != nil {
return false, nil, err
return authFailure, nil, err
}
for {
packet, err := c.readPacket()
if err != nil {
return false, nil, err
return authFailure, nil, err
}
// like handleAuthResponse, but with less options.
switch packet[0] {
case msgUserAuthBanner:
// TODO: Print banners during userauth.
if err := handleBannerResponse(c, packet); err != nil {
return authFailure, nil, err
}
continue
case msgUserAuthInfoRequest:
// OK
case msgUserAuthFailure:
var msg userAuthFailureMsg
if err := Unmarshal(packet, &msg); err != nil {
return false, nil, err
return authFailure, nil, err
}
return false, msg.Methods, nil
if msg.PartialSuccess {
return authPartialSuccess, msg.Methods, nil
}
return authFailure, msg.Methods, nil
case msgUserAuthSuccess:
return true, nil, nil
return authSuccess, nil, nil
default:
return false, nil, unexpectedMessageError(msgUserAuthInfoRequest, packet[0])
return authFailure, nil, unexpectedMessageError(msgUserAuthInfoRequest, packet[0])
}
var msg userAuthInfoRequestMsg
if err := Unmarshal(packet, &msg); err != nil {
return false, nil, err
return authFailure, nil, err
}
// Manually unpack the prompt/echo pairs.
@ -413,7 +452,7 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
for i := 0; i < int(msg.NumPrompts); i++ {
prompt, r, ok := parseString(rest)
if !ok || len(r) == 0 {
return false, nil, errors.New("ssh: prompt format error")
return authFailure, nil, errors.New("ssh: prompt format error")
}
prompts = append(prompts, string(prompt))
echos = append(echos, r[0] != 0)
@ -421,16 +460,16 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
}
if len(rest) != 0 {
return false, nil, errors.New("ssh: extra data following keyboard-interactive pairs")
return authFailure, nil, errors.New("ssh: extra data following keyboard-interactive pairs")
}
answers, err := cb(msg.User, msg.Instruction, prompts, echos)
if err != nil {
return false, nil, err
return authFailure, nil, err
}
if len(answers) != len(prompts) {
return false, nil, errors.New("ssh: not enough answers from keyboard-interactive callback")
return authFailure, nil, errors.New("ssh: not enough answers from keyboard-interactive callback")
}
responseLength := 1 + 4
for _, a := range answers {
@ -446,7 +485,7 @@ func (cb KeyboardInteractiveChallenge) auth(session []byte, user string, c packe
}
if err := c.writePacket(serialized); err != nil {
return false, nil, err
return authFailure, nil, err
}
}
}
@ -456,10 +495,10 @@ type retryableAuthMethod struct {
maxTries int
}
func (r *retryableAuthMethod) auth(session []byte, user string, c packetConn, rand io.Reader) (ok bool, methods []string, err error) {
func (r *retryableAuthMethod) auth(session []byte, user string, c packetConn, rand io.Reader) (ok authResult, methods []string, err error) {
for i := 0; r.maxTries <= 0 || i < r.maxTries; i++ {
ok, methods, err = r.authMethod.auth(session, user, c, rand)
if ok || err != nil { // either success or error terminate
if ok != authFailure || err != nil { // either success, partial success or error terminate
return ok, methods, err
}
}

20
vendor/golang.org/x/crypto/ssh/common.go generated vendored
View File

@ -24,11 +24,21 @@ const (
serviceSSH = "ssh-connection"
)
// supportedCiphers specifies the supported ciphers in preference order.
// supportedCiphers lists ciphers we support but might not recommend.
var supportedCiphers = []string{
"aes128-ctr", "aes192-ctr", "aes256-ctr",
"aes128-gcm@openssh.com",
"arcfour256", "arcfour128",
chacha20Poly1305ID,
"arcfour256", "arcfour128", "arcfour",
aes128cbcID,
tripledescbcID,
}
// preferredCiphers specifies the default preference for ciphers.
var preferredCiphers = []string{
"aes128-gcm@openssh.com",
chacha20Poly1305ID,
"aes128-ctr", "aes192-ctr", "aes256-ctr",
}
// supportedKexAlgos specifies the supported key-exchange algorithms in
@ -211,7 +221,7 @@ func (c *Config) SetDefaults() {
c.Rand = rand.Reader
}
if c.Ciphers == nil {
c.Ciphers = supportedCiphers
c.Ciphers = preferredCiphers
}
var ciphers []string
for _, c := range c.Ciphers {
@ -242,7 +252,7 @@ func (c *Config) SetDefaults() {
// buildDataSignedForAuth returns the data that is signed in order to prove
// possession of a private key. See RFC 4252, section 7.
func buildDataSignedForAuth(sessionId []byte, req userAuthRequestMsg, algo, pubKey []byte) []byte {
func buildDataSignedForAuth(sessionID []byte, req userAuthRequestMsg, algo, pubKey []byte) []byte {
data := struct {
Session []byte
Type byte
@ -253,7 +263,7 @@ func buildDataSignedForAuth(sessionId []byte, req userAuthRequestMsg, algo, pubK
Algo []byte
PubKey []byte
}{
sessionId,
sessionID,
msgUserAuthRequest,
req.User,
req.Service,

6
vendor/golang.org/x/crypto/ssh/handshake.go generated vendored
View File

@ -78,6 +78,11 @@ type handshakeTransport struct {
dialAddress string
remoteAddr net.Addr
// bannerCallback is non-empty if we are the client and it has been set in
// ClientConfig. In that case it is called during the user authentication
// dance to handle a custom server's message.
bannerCallback BannerCallback
// Algorithms agreed in the last key exchange.
algorithms *algorithms
@ -120,6 +125,7 @@ func newClientTransport(conn keyingTransport, clientVersion, serverVersion []byt
t.dialAddress = dialAddr
t.remoteAddr = addr
t.hostKeyCallback = config.HostKeyCallback
t.bannerCallback = config.BannerCallback
if config.HostKeyAlgorithms != nil {
t.hostKeyAlgorithms = config.HostKeyAlgorithms
} else {

24
vendor/golang.org/x/crypto/ssh/kex.go generated vendored
View File

@ -119,7 +119,7 @@ func (group *dhGroup) Client(c packetConn, randSource io.Reader, magics *handsha
return nil, err
}
kInt, err := group.diffieHellman(kexDHReply.Y, x)
ki, err := group.diffieHellman(kexDHReply.Y, x)
if err != nil {
return nil, err
}
@ -129,8 +129,8 @@ func (group *dhGroup) Client(c packetConn, randSource io.Reader, magics *handsha
writeString(h, kexDHReply.HostKey)
writeInt(h, X)
writeInt(h, kexDHReply.Y)
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
K := make([]byte, intLength(ki))
marshalInt(K, ki)
h.Write(K)
return &kexResult{
@ -164,7 +164,7 @@ func (group *dhGroup) Server(c packetConn, randSource io.Reader, magics *handsha
}
Y := new(big.Int).Exp(group.g, y, group.p)
kInt, err := group.diffieHellman(kexDHInit.X, y)
ki, err := group.diffieHellman(kexDHInit.X, y)
if err != nil {
return nil, err
}
@ -177,8 +177,8 @@ func (group *dhGroup) Server(c packetConn, randSource io.Reader, magics *handsha
writeInt(h, kexDHInit.X)
writeInt(h, Y)
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
K := make([]byte, intLength(ki))
marshalInt(K, ki)
h.Write(K)
H := h.Sum(nil)
@ -462,9 +462,9 @@ func (kex *curve25519sha256) Client(c packetConn, rand io.Reader, magics *handsh
writeString(h, kp.pub[:])
writeString(h, reply.EphemeralPubKey)
kInt := new(big.Int).SetBytes(secret[:])
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
ki := new(big.Int).SetBytes(secret[:])
K := make([]byte, intLength(ki))
marshalInt(K, ki)
h.Write(K)
return &kexResult{
@ -510,9 +510,9 @@ func (kex *curve25519sha256) Server(c packetConn, rand io.Reader, magics *handsh
writeString(h, kexInit.ClientPubKey)
writeString(h, kp.pub[:])
kInt := new(big.Int).SetBytes(secret[:])
K := make([]byte, intLength(kInt))
marshalInt(K, kInt)
ki := new(big.Int).SetBytes(secret[:])
K := make([]byte, intLength(ki))
marshalInt(K, ki)
h.Write(K)
H := h.Sum(nil)

47
vendor/golang.org/x/crypto/ssh/keys.go generated vendored
View File

@ -276,7 +276,8 @@ type PublicKey interface {
Type() string
// Marshal returns the serialized key data in SSH wire format,
// with the name prefix.
// with the name prefix. To unmarshal the returned data, use
// the ParsePublicKey function.
Marshal() []byte
// Verify that sig is a signature on the given data using this
@ -363,7 +364,7 @@ func (r *rsaPublicKey) CryptoPublicKey() crypto.PublicKey {
type dsaPublicKey dsa.PublicKey
func (r *dsaPublicKey) Type() string {
func (k *dsaPublicKey) Type() string {
return "ssh-dss"
}
@ -481,12 +482,12 @@ func (k *dsaPrivateKey) Sign(rand io.Reader, data []byte) (*Signature, error) {
type ecdsaPublicKey ecdsa.PublicKey
func (key *ecdsaPublicKey) Type() string {
return "ecdsa-sha2-" + key.nistID()
func (k *ecdsaPublicKey) Type() string {
return "ecdsa-sha2-" + k.nistID()
}
func (key *ecdsaPublicKey) nistID() string {
switch key.Params().BitSize {
func (k *ecdsaPublicKey) nistID() string {
switch k.Params().BitSize {
case 256:
return "nistp256"
case 384:
@ -499,7 +500,7 @@ func (key *ecdsaPublicKey) nistID() string {
type ed25519PublicKey ed25519.PublicKey
func (key ed25519PublicKey) Type() string {
func (k ed25519PublicKey) Type() string {
return KeyAlgoED25519
}
@ -518,23 +519,23 @@ func parseED25519(in []byte) (out PublicKey, rest []byte, err error) {
return (ed25519PublicKey)(key), w.Rest, nil
}
func (key ed25519PublicKey) Marshal() []byte {
func (k ed25519PublicKey) Marshal() []byte {
w := struct {
Name string
KeyBytes []byte
}{
KeyAlgoED25519,
[]byte(key),
[]byte(k),
}
return Marshal(&w)
}
func (key ed25519PublicKey) Verify(b []byte, sig *Signature) error {
if sig.Format != key.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, key.Type())
func (k ed25519PublicKey) Verify(b []byte, sig *Signature) error {
if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, k.Type())
}
edKey := (ed25519.PublicKey)(key)
edKey := (ed25519.PublicKey)(k)
if ok := ed25519.Verify(edKey, b, sig.Blob); !ok {
return errors.New("ssh: signature did not verify")
}
@ -595,9 +596,9 @@ func parseECDSA(in []byte) (out PublicKey, rest []byte, err error) {
return (*ecdsaPublicKey)(key), w.Rest, nil
}
func (key *ecdsaPublicKey) Marshal() []byte {
func (k *ecdsaPublicKey) Marshal() []byte {
// See RFC 5656, section 3.1.
keyBytes := elliptic.Marshal(key.Curve, key.X, key.Y)
keyBytes := elliptic.Marshal(k.Curve, k.X, k.Y)
// ECDSA publickey struct layout should match the struct used by
// parseECDSACert in the x/crypto/ssh/agent package.
w := struct {
@ -605,20 +606,20 @@ func (key *ecdsaPublicKey) Marshal() []byte {
ID string
Key []byte
}{
key.Type(),
key.nistID(),
k.Type(),
k.nistID(),
keyBytes,
}
return Marshal(&w)
}
func (key *ecdsaPublicKey) Verify(data []byte, sig *Signature) error {
if sig.Format != key.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, key.Type())
func (k *ecdsaPublicKey) Verify(data []byte, sig *Signature) error {
if sig.Format != k.Type() {
return fmt.Errorf("ssh: signature type %s for key type %s", sig.Format, k.Type())
}
h := ecHash(key.Curve).New()
h := ecHash(k.Curve).New()
h.Write(data)
digest := h.Sum(nil)
@ -635,7 +636,7 @@ func (key *ecdsaPublicKey) Verify(data []byte, sig *Signature) error {
return err
}
if ecdsa.Verify((*ecdsa.PublicKey)(key), digest, ecSig.R, ecSig.S) {
if ecdsa.Verify((*ecdsa.PublicKey)(k), digest, ecSig.R, ecSig.S) {
return nil
}
return errors.New("ssh: signature did not verify")
@ -758,7 +759,7 @@ func NewPublicKey(key interface{}) (PublicKey, error) {
return (*rsaPublicKey)(key), nil
case *ecdsa.PublicKey:
if !supportedEllipticCurve(key.Curve) {
return nil, errors.New("ssh: only P-256, P-384 and P-521 EC keys are supported.")
return nil, errors.New("ssh: only P-256, P-384 and P-521 EC keys are supported")
}
return (*ecdsaPublicKey)(key), nil
case *dsa.PublicKey:

38
vendor/golang.org/x/crypto/ssh/messages.go generated vendored
View File

@ -23,10 +23,6 @@ const (
msgUnimplemented = 3
msgDebug = 4
msgNewKeys = 21
// Standard authentication messages
msgUserAuthSuccess = 52
msgUserAuthBanner = 53
)
// SSH messages:
@ -137,6 +133,18 @@ type userAuthFailureMsg struct {
PartialSuccess bool
}
// See RFC 4252, section 5.1
const msgUserAuthSuccess = 52
// See RFC 4252, section 5.4
const msgUserAuthBanner = 53
type userAuthBannerMsg struct {
Message string `sshtype:"53"`
// unused, but required to allow message parsing
Language string
}
// See RFC 4256, section 3.2
const msgUserAuthInfoRequest = 60
const msgUserAuthInfoResponse = 61
@ -154,7 +162,7 @@ const msgChannelOpen = 90
type channelOpenMsg struct {
ChanType string `sshtype:"90"`
PeersId uint32
PeersID uint32
PeersWindow uint32
MaxPacketSize uint32
TypeSpecificData []byte `ssh:"rest"`
@ -165,7 +173,7 @@ const msgChannelData = 94
// Used for debug print outs of packets.
type channelDataMsg struct {
PeersId uint32 `sshtype:"94"`
PeersID uint32 `sshtype:"94"`
Length uint32
Rest []byte `ssh:"rest"`
}
@ -174,8 +182,8 @@ type channelDataMsg struct {
const msgChannelOpenConfirm = 91
type channelOpenConfirmMsg struct {
PeersId uint32 `sshtype:"91"`
MyId uint32
PeersID uint32 `sshtype:"91"`
MyID uint32
MyWindow uint32
MaxPacketSize uint32
TypeSpecificData []byte `ssh:"rest"`
@ -185,7 +193,7 @@ type channelOpenConfirmMsg struct {
const msgChannelOpenFailure = 92
type channelOpenFailureMsg struct {
PeersId uint32 `sshtype:"92"`
PeersID uint32 `sshtype:"92"`
Reason RejectionReason
Message string
Language string
@ -194,7 +202,7 @@ type channelOpenFailureMsg struct {
const msgChannelRequest = 98
type channelRequestMsg struct {
PeersId uint32 `sshtype:"98"`
PeersID uint32 `sshtype:"98"`
Request string
WantReply bool
RequestSpecificData []byte `ssh:"rest"`
@ -204,28 +212,28 @@ type channelRequestMsg struct {
const msgChannelSuccess = 99
type channelRequestSuccessMsg struct {
PeersId uint32 `sshtype:"99"`
PeersID uint32 `sshtype:"99"`
}
// See RFC 4254, section 5.4.
const msgChannelFailure = 100
type channelRequestFailureMsg struct {
PeersId uint32 `sshtype:"100"`
PeersID uint32 `sshtype:"100"`
}
// See RFC 4254, section 5.3
const msgChannelClose = 97
type channelCloseMsg struct {
PeersId uint32 `sshtype:"97"`
PeersID uint32 `sshtype:"97"`
}
// See RFC 4254, section 5.3
const msgChannelEOF = 96
type channelEOFMsg struct {
PeersId uint32 `sshtype:"96"`
PeersID uint32 `sshtype:"96"`
}
// See RFC 4254, section 4
@ -255,7 +263,7 @@ type globalRequestFailureMsg struct {
const msgChannelWindowAdjust = 93
type windowAdjustMsg struct {
PeersId uint32 `sshtype:"93"`
PeersID uint32 `sshtype:"93"`
AdditionalBytes uint32
}

6
vendor/golang.org/x/crypto/ssh/mux.go generated vendored
View File

@ -278,7 +278,7 @@ func (m *mux) handleChannelOpen(packet []byte) error {
if msg.MaxPacketSize < minPacketLength || msg.MaxPacketSize > 1<<31 {
failMsg := channelOpenFailureMsg{
PeersId: msg.PeersId,
PeersID: msg.PeersID,
Reason: ConnectionFailed,
Message: "invalid request",
Language: "en_US.UTF-8",
@ -287,7 +287,7 @@ func (m *mux) handleChannelOpen(packet []byte) error {
}
c := m.newChannel(msg.ChanType, channelInbound, msg.TypeSpecificData)
c.remoteId = msg.PeersId
c.remoteId = msg.PeersID
c.maxRemotePayload = msg.MaxPacketSize
c.remoteWin.add(msg.PeersWindow)
m.incomingChannels <- c
@ -313,7 +313,7 @@ func (m *mux) openChannel(chanType string, extra []byte) (*channel, error) {
PeersWindow: ch.myWindow,
MaxPacketSize: ch.maxIncomingPayload,
TypeSpecificData: extra,
PeersId: ch.localId,
PeersID: ch.localId,
}
if err := m.sendMessage(open); err != nil {
return nil, err

42
vendor/golang.org/x/crypto/ssh/server.go generated vendored
View File

@ -95,6 +95,10 @@ type ServerConfig struct {
// Note that RFC 4253 section 4.2 requires that this string start with
// "SSH-2.0-".
ServerVersion string
// BannerCallback, if present, is called and the return string is sent to
// the client after key exchange completed but before authentication.
BannerCallback func(conn ConnMetadata) string
}
// AddHostKey adds a private key as a host key. If an existing host
@ -162,6 +166,9 @@ type ServerConn struct {
// unsuccessful, it closes the connection and returns an error. The
// Request and NewChannel channels must be serviced, or the connection
// will hang.
//
// The returned error may be of type *ServerAuthError for
// authentication errors.
func NewServerConn(c net.Conn, config *ServerConfig) (*ServerConn, <-chan NewChannel, <-chan *Request, error) {
fullConf := *config
fullConf.SetDefaults()
@ -252,7 +259,7 @@ func (s *connection) serverHandshake(config *ServerConfig) (*Permissions, error)
func isAcceptableAlgo(algo string) bool {
switch algo {
case KeyAlgoRSA, KeyAlgoDSA, KeyAlgoECDSA256, KeyAlgoECDSA384, KeyAlgoECDSA521, KeyAlgoED25519,
CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01:
CertAlgoRSAv01, CertAlgoDSAv01, CertAlgoECDSA256v01, CertAlgoECDSA384v01, CertAlgoECDSA521v01, CertAlgoED25519v01:
return true
}
return false
@ -288,12 +295,13 @@ func checkSourceAddress(addr net.Addr, sourceAddrs string) error {
return fmt.Errorf("ssh: remote address %v is not allowed because of source-address restriction", addr)
}
// ServerAuthError implements the error interface. It appends any authentication
// errors that may occur, and is returned if all of the authentication methods
// provided by the user failed to authenticate.
// ServerAuthError represents server authentication errors and is
// sometimes returned by NewServerConn. It appends any authentication
// errors that may occur, and is returned if all of the authentication
// methods provided by the user failed to authenticate.
type ServerAuthError struct {
// Errors contains authentication errors returned by the authentication
// callback methods.
// callback methods. The first entry is typically ErrNoAuth.
Errors []error
}
@ -305,6 +313,13 @@ func (l ServerAuthError) Error() string {
return "[" + strings.Join(errs, ", ") + "]"
}
// ErrNoAuth is the error value returned if no
// authentication method has been passed yet. This happens as a normal
// part of the authentication loop, since the client first tries
// 'none' authentication to discover available methods.
// It is returned in ServerAuthError.Errors from NewServerConn.
var ErrNoAuth = errors.New("ssh: no auth passed yet")
func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, error) {
sessionID := s.transport.getSessionID()
var cache pubKeyCache
@ -312,6 +327,7 @@ func (s *connection) serverAuthenticate(config *ServerConfig) (*Permissions, err
authFailures := 0
var authErrs []error
var displayedBanner bool
userAuthLoop:
for {
@ -343,8 +359,22 @@ userAuthLoop:
}
s.user = userAuthReq.User
if !displayedBanner && config.BannerCallback != nil {
displayedBanner = true
msg := config.BannerCallback(s)
if msg != "" {
bannerMsg := &userAuthBannerMsg{
Message: msg,
}
if err := s.transport.writePacket(Marshal(bannerMsg)); err != nil {
return nil, err
}
}
}
perms = nil
authErr := errors.New("no auth passed yet")
authErr := ErrNoAuth
switch userAuthReq.Method {
case "none":

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

@ -406,7 +406,7 @@ func (s *Session) Wait() error {
s.stdinPipeWriter.Close()
}
var copyError error
for _ = range s.copyFuncs {
for range s.copyFuncs {
if err := <-s.errors; err != nil && copyError == nil {
copyError = err
}

1
vendor/golang.org/x/crypto/ssh/streamlocal.go generated vendored
View File

@ -32,6 +32,7 @@ type streamLocalChannelForwardMsg struct {
// ListenUnix is similar to ListenTCP but uses a Unix domain socket.
func (c *Client) ListenUnix(socketPath string) (net.Listener, error) {
c.handleForwardsOnce.Do(c.handleForwards)
m := streamLocalChannelForwardMsg{
socketPath,
}

9
vendor/golang.org/x/crypto/ssh/tcpip.go generated vendored
View File

@ -90,10 +90,19 @@ type channelForwardMsg struct {
rport uint32
}
// handleForwards starts goroutines handling forwarded connections.
// It's called on first use by (*Client).ListenTCP to not launch
// goroutines until needed.
func (c *Client) handleForwards() {
go c.forwards.handleChannels(c.HandleChannelOpen("forwarded-tcpip"))
go c.forwards.handleChannels(c.HandleChannelOpen("forwarded-streamlocal@openssh.com"))
}
// ListenTCP requests the remote peer open a listening socket
// on laddr. Incoming connections will be available by calling
// Accept on the returned net.Listener.
func (c *Client) ListenTCP(laddr *net.TCPAddr) (net.Listener, error) {
c.handleForwardsOnce.Do(c.handleForwards)
if laddr.Port == 0 && isBrokenOpenSSHVersion(string(c.ServerVersion())) {
return c.autoPortListenWorkaround(laddr)
}

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

@ -617,7 +617,7 @@ func writeWithCRLF(w io.Writer, buf []byte) (n int, err error) {
if _, err = w.Write(crlf); err != nil {
return n, err
}
n += 1
n++
buf = buf[1:]
}
}

71
vendor/golang.org/x/crypto/ssh/terminal/util.go generated vendored
View File

@ -17,44 +17,41 @@
package terminal // import "golang.org/x/crypto/ssh/terminal"
import (
"syscall"
"unsafe"
"golang.org/x/sys/unix"
)
// State contains the state of a terminal.
type State struct {
termios syscall.Termios
termios unix.Termios
}
// IsTerminal returns true if the given file descriptor is a terminal.
func IsTerminal(fd int) bool {
var termios syscall.Termios
_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
return err == 0
_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
return err == nil
}
// MakeRaw put the terminal connected to the given file descriptor into raw
// mode and returns the previous state of the terminal so that it can be
// restored.
func MakeRaw(fd int) (*State, error) {
var oldState State
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); err != 0 {
termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
if err != nil {
return nil, err
}
newState := oldState.termios
oldState := State{termios: *termios}
// This attempts to replicate the behaviour documented for cfmakeraw in
// the termios(3) manpage.
newState.Iflag &^= syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON
newState.Oflag &^= syscall.OPOST
newState.Lflag &^= syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN
newState.Cflag &^= syscall.CSIZE | syscall.PARENB
newState.Cflag |= syscall.CS8
newState.Cc[unix.VMIN] = 1
newState.Cc[unix.VTIME] = 0
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&newState)), 0, 0, 0); err != 0 {
termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
termios.Oflag &^= unix.OPOST
termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
termios.Cflag &^= unix.CSIZE | unix.PARENB
termios.Cflag |= unix.CS8
termios.Cc[unix.VMIN] = 1
termios.Cc[unix.VTIME] = 0
if err := unix.IoctlSetTermios(fd, ioctlWriteTermios, termios); err != nil {
return nil, err
}
@ -64,60 +61,54 @@ func MakeRaw(fd int) (*State, error) {
// GetState returns the current state of a terminal which may be useful to
// restore the terminal after a signal.
func GetState(fd int) (*State, error) {
var oldState State
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); err != 0 {
termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
if err != nil {
return nil, err
}
return &oldState, nil
return &State{termios: *termios}, nil
}
// Restore restores the terminal connected to the given file descriptor to a
// previous state.
func Restore(fd int, state *State) error {
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0); err != 0 {
return err
}
return nil
return unix.IoctlSetTermios(fd, ioctlWriteTermios, &state.termios)
}
// GetSize returns the dimensions of the given terminal.
func GetSize(fd int) (width, height int, err error) {
var dimensions [4]uint16
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&dimensions)), 0, 0, 0); err != 0 {
ws, err := unix.IoctlGetWinsize(fd, unix.TIOCGWINSZ)
if err != nil {
return -1, -1, err
}
return int(dimensions[1]), int(dimensions[0]), nil
return int(ws.Col), int(ws.Row), nil
}
// passwordReader is an io.Reader that reads from a specific file descriptor.
type passwordReader int
func (r passwordReader) Read(buf []byte) (int, error) {
return syscall.Read(int(r), buf)
return unix.Read(int(r), buf)
}
// ReadPassword reads a line of input from a terminal without local echo. This
// is commonly used for inputting passwords and other sensitive data. The slice
// returned does not include the \n.
func ReadPassword(fd int) ([]byte, error) {
var oldState syscall.Termios
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlReadTermios, uintptr(unsafe.Pointer(&oldState)), 0, 0, 0); err != 0 {
termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
if err != nil {
return nil, err
}
newState := oldState
newState.Lflag &^= syscall.ECHO
newState.Lflag |= syscall.ICANON | syscall.ISIG
newState.Iflag |= syscall.ICRNL
if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&newState)), 0, 0, 0); err != 0 {
newState := *termios
newState.Lflag &^= unix.ECHO
newState.Lflag |= unix.ICANON | unix.ISIG
newState.Iflag |= unix.ICRNL
if err := unix.IoctlSetTermios(fd, ioctlWriteTermios, &newState); err != nil {
return nil, err
}
defer func() {
syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&oldState)), 0, 0, 0)
}()
defer unix.IoctlSetTermios(fd, ioctlWriteTermios, termios)
return readPasswordLine(passwordReader(fd))
}

36
vendor/golang.org/x/crypto/ssh/terminal/util_solaris.go generated vendored
View File

@ -14,7 +14,7 @@ import (
// State contains the state of a terminal.
type State struct {
state *unix.Termios
termios unix.Termios
}
// IsTerminal returns true if the given file descriptor is a terminal.
@ -75,47 +75,43 @@ func ReadPassword(fd int) ([]byte, error) {
// restored.
// see http://cr.illumos.org/~webrev/andy_js/1060/
func MakeRaw(fd int) (*State, error) {
oldTermiosPtr, err := unix.IoctlGetTermios(fd, unix.TCGETS)
termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
if err != nil {
return nil, err
}
oldTermios := *oldTermiosPtr
newTermios := oldTermios
newTermios.Iflag &^= syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON
newTermios.Oflag &^= syscall.OPOST
newTermios.Lflag &^= syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN
newTermios.Cflag &^= syscall.CSIZE | syscall.PARENB
newTermios.Cflag |= syscall.CS8
newTermios.Cc[unix.VMIN] = 1
newTermios.Cc[unix.VTIME] = 0
oldState := State{termios: *termios}
if err := unix.IoctlSetTermios(fd, unix.TCSETS, &newTermios); err != nil {
termios.Iflag &^= unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON
termios.Oflag &^= unix.OPOST
termios.Lflag &^= unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN
termios.Cflag &^= unix.CSIZE | unix.PARENB
termios.Cflag |= unix.CS8
termios.Cc[unix.VMIN] = 1
termios.Cc[unix.VTIME] = 0
if err := unix.IoctlSetTermios(fd, unix.TCSETS, termios); err != nil {
return nil, err
}
return &State{
state: oldTermiosPtr,
}, nil
return &oldState, nil
}
// Restore restores the terminal connected to the given file descriptor to a
// previous state.
func Restore(fd int, oldState *State) error {
return unix.IoctlSetTermios(fd, unix.TCSETS, oldState.state)
return unix.IoctlSetTermios(fd, unix.TCSETS, &oldState.termios)
}
// GetState returns the current state of a terminal which may be useful to
// restore the terminal after a signal.
func GetState(fd int) (*State, error) {
oldTermiosPtr, err := unix.IoctlGetTermios(fd, unix.TCGETS)
termios, err := unix.IoctlGetTermios(fd, unix.TCGETS)
if err != nil {
return nil, err
}
return &State{
state: oldTermiosPtr,
}, nil
return &State{termios: *termios}, nil
}
// GetSize returns the dimensions of the given terminal.

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

@ -17,6 +17,8 @@
package terminal
import (
"os"
"golang.org/x/sys/windows"
)
@ -71,13 +73,6 @@ func GetSize(fd int) (width, height int, err error) {
return int(info.Size.X), int(info.Size.Y), nil
}
// passwordReader is an io.Reader that reads from a specific Windows HANDLE.
type passwordReader int
func (r passwordReader) Read(buf []byte) (int, error) {
return windows.Read(windows.Handle(r), buf)
}
// ReadPassword reads a line of input from a terminal without local echo. This
// is commonly used for inputting passwords and other sensitive data. The slice
// returned does not include the \n.
@ -94,9 +89,15 @@ func ReadPassword(fd int) ([]byte, error) {
return nil, err
}
defer func() {
windows.SetConsoleMode(windows.Handle(fd), old)
}()
defer windows.SetConsoleMode(windows.Handle(fd), old)
return readPasswordLine(passwordReader(fd))
var h windows.Handle
p, _ := windows.GetCurrentProcess()
if err := windows.DuplicateHandle(p, windows.Handle(fd), p, &h, 0, false, windows.DUPLICATE_SAME_ACCESS); err != nil {
return nil, err
}
f := os.NewFile(uintptr(h), "stdin")
defer f.Close()
return readPasswordLine(f)
}

72
vendor/golang.org/x/crypto/ssh/transport.go generated vendored
View File

@ -6,6 +6,7 @@ package ssh
import (
"bufio"
"bytes"
"errors"
"io"
"log"
@ -76,17 +77,17 @@ type connectionState struct {
// both directions are triggered by reading and writing a msgNewKey packet
// respectively.
func (t *transport) prepareKeyChange(algs *algorithms, kexResult *kexResult) error {
if ciph, err := newPacketCipher(t.reader.dir, algs.r, kexResult); err != nil {
ciph, err := newPacketCipher(t.reader.dir, algs.r, kexResult)
if err != nil {
return err
} else {
t.reader.pendingKeyChange <- ciph
}
t.reader.pendingKeyChange <- ciph
if ciph, err := newPacketCipher(t.writer.dir, algs.w, kexResult); err != nil {
ciph, err = newPacketCipher(t.writer.dir, algs.w, kexResult)
if err != nil {
return err
} else {
t.writer.pendingKeyChange <- ciph
}
t.writer.pendingKeyChange <- ciph
return nil
}
@ -139,7 +140,7 @@ func (s *connectionState) readPacket(r *bufio.Reader) ([]byte, error) {
case cipher := <-s.pendingKeyChange:
s.packetCipher = cipher
default:
return nil, errors.New("ssh: got bogus newkeys message.")
return nil, errors.New("ssh: got bogus newkeys message")
}
case msgDisconnect:
@ -232,52 +233,22 @@ var (
clientKeys = direction{[]byte{'A'}, []byte{'C'}, []byte{'E'}}
)
// generateKeys generates key material for IV, MAC and encryption.
func generateKeys(d direction, algs directionAlgorithms, kex *kexResult) (iv, key, macKey []byte) {
cipherMode := cipherModes[algs.Cipher]
macMode := macModes[algs.MAC]
iv = make([]byte, cipherMode.ivSize)
key = make([]byte, cipherMode.keySize)
macKey = make([]byte, macMode.keySize)
generateKeyMaterial(iv, d.ivTag, kex)
generateKeyMaterial(key, d.keyTag, kex)
generateKeyMaterial(macKey, d.macKeyTag, kex)
return
}
// setupKeys sets the cipher and MAC keys from kex.K, kex.H and sessionId, as
// described in RFC 4253, section 6.4. direction should either be serverKeys
// (to setup server->client keys) or clientKeys (for client->server keys).
func newPacketCipher(d direction, algs directionAlgorithms, kex *kexResult) (packetCipher, error) {
iv, key, macKey := generateKeys(d, algs, kex)
cipherMode := cipherModes[algs.Cipher]
macMode := macModes[algs.MAC]
if algs.Cipher == gcmCipherID {
return newGCMCipher(iv, key, macKey)
}
iv := make([]byte, cipherMode.ivSize)
key := make([]byte, cipherMode.keySize)
macKey := make([]byte, macMode.keySize)
if algs.Cipher == aes128cbcID {
return newAESCBCCipher(iv, key, macKey, algs)
}
generateKeyMaterial(iv, d.ivTag, kex)
generateKeyMaterial(key, d.keyTag, kex)
generateKeyMaterial(macKey, d.macKeyTag, kex)
if algs.Cipher == tripledescbcID {
return newTripleDESCBCCipher(iv, key, macKey, algs)
}
c := &streamPacketCipher{
mac: macModes[algs.MAC].new(macKey),
etm: macModes[algs.MAC].etm,
}
c.macResult = make([]byte, c.mac.Size())
var err error
c.cipher, err = cipherModes[algs.Cipher].createStream(key, iv)
if err != nil {
return nil, err
}
return c, nil
return cipherModes[algs.Cipher].create(key, iv, macKey, algs)
}
// generateKeyMaterial fills out with key material generated from tag, K, H
@ -342,7 +313,7 @@ func readVersion(r io.Reader) ([]byte, error) {
var ok bool
var buf [1]byte
for len(versionString) < maxVersionStringBytes {
for length := 0; length < maxVersionStringBytes; length++ {
_, err := io.ReadFull(r, buf[:])
if err != nil {
return nil, err
@ -350,6 +321,13 @@ func readVersion(r io.Reader) ([]byte, error) {
// The RFC says that the version should be terminated with \r\n
// but several SSH servers actually only send a \n.
if buf[0] == '\n' {
if !bytes.HasPrefix(versionString, []byte("SSH-")) {
// RFC 4253 says we need to ignore all version string lines
// except the one containing the SSH version (provided that
// all the lines do not exceed 255 bytes in total).
versionString = versionString[:0]
continue
}
ok = true
break
}