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packet mode reader and writer

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This commit is contained in:
Darien Raymond 2017-05-02 00:28:16 +02:00
parent 9594243ee2
commit 939fae00e9
No known key found for this signature in database
GPG Key ID: 7251FFA14BB18169
8 changed files with 234 additions and 44 deletions
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24
common/buf/multi_buffer.go
View File

@ -61,6 +61,21 @@ func (mb *MultiBuffer) Read(b []byte) (int, error) {
return totalBytes, nil
}
func (mb *MultiBuffer) Write(b []byte) {
n := len(*mb)
if n > 0 && !(*mb)[n-1].IsFull() {
nBytes, _ := (*mb)[n-1].Write(b)
b = b[nBytes:]
}
for len(b) > 0 {
bb := New()
nBytes, _ := bb.Write(b)
b = b[nBytes:]
mb.Append(bb)
}
}
// Len returns the total number of bytes in the MultiBuffer.
func (mb MultiBuffer) Len() int {
size := 0
@ -112,3 +127,12 @@ func (mb *MultiBuffer) SliceBySize(size int) MultiBuffer {
*mb = (*mb)[endIndex:]
return slice
}
func (mb *MultiBuffer) SplitFirst() *Buffer {
if len(*mb) == 0 {
return nil
}
b := (*mb)[0]
*mb = (*mb)[1:]
return b
}

10
common/buf/reader.go
View File

@ -20,14 +20,8 @@ func (r *BytesToBufferReader) Read() (MultiBuffer, error) {
}
mb := NewMultiBuffer()
p := r.buffer[:nBytes]
for len(p) > 0 {
b := New()
nBytes, _ := b.Write(p)
mb.Append(b)
p = p[nBytes:]
}
return mb, nil
mb.Write(r.buffer[:nBytes])
return mb, nil
}
type readerAdpater struct {

7
common/buf/writer.go
View File

@ -72,12 +72,7 @@ type bytesToBufferWriter struct {
// Write implements io.Writer.
func (w *bytesToBufferWriter) Write(payload []byte) (int, error) {
mb := NewMultiBuffer()
for p := payload; len(p) > 0; {
b := New()
nBytes, _ := b.Write(p)
p = p[nBytes:]
mb.Append(b)
}
mb.Write(payload)
if err := w.writer.Write(mb); err != nil {
return 0, err
}

77
common/crypto/auth.go
View File

@ -73,19 +73,21 @@ type AuthenticationReader struct {
reader io.Reader
sizeParser ChunkSizeDecoder
size int
mode StreamMode
}
const (
readerBufferSize = 32 * 1024
)
func NewAuthenticationReader(auth Authenticator, sizeParser ChunkSizeDecoder, reader io.Reader) *AuthenticationReader {
func NewAuthenticationReader(auth Authenticator, sizeParser ChunkSizeDecoder, reader io.Reader, mode StreamMode) *AuthenticationReader {
return &AuthenticationReader{
auth: auth,
buffer: buf.NewLocal(readerBufferSize),
reader: reader,
sizeParser: sizeParser,
size: -1,
mode: mode,
}
}
@ -151,23 +153,36 @@ func (r *AuthenticationReader) Read() (buf.MultiBuffer, error) {
}
mb := buf.NewMultiBuffer()
appendBytes := func(b []byte) {
for len(b) > 0 {
buffer := buf.New()
n, _ := buffer.Write(b)
b = b[n:]
mb.Append(buffer)
if r.mode == ModeStream {
mb.Write(b)
} else {
var bb *buf.Buffer
if len(b) < buf.Size {
bb = buf.New()
} else {
bb = buf.NewLocal(len(b))
}
bb.Append(b)
mb.Append(bb)
}
appendBytes(b)
for r.buffer.Len() >= r.sizeParser.SizeBytes() {
b, err := r.readChunk(false)
if err != nil {
break
}
appendBytes(b)
if r.mode == ModeStream {
mb.Write(b)
} else {
var bb *buf.Buffer
if len(b) < buf.Size {
bb = buf.New()
} else {
bb = buf.NewLocal(len(b))
}
bb.Append(b)
mb.Append(bb)
}
}
return mb, nil
@ -179,15 +194,17 @@ type AuthenticationWriter struct {
buffer *buf.Buffer
writer io.Writer
sizeParser ChunkSizeEncoder
mode StreamMode
}
func NewAuthenticationWriter(auth Authenticator, sizeParser ChunkSizeEncoder, writer io.Writer) *AuthenticationWriter {
func NewAuthenticationWriter(auth Authenticator, sizeParser ChunkSizeEncoder, writer io.Writer, mode StreamMode) *AuthenticationWriter {
return &AuthenticationWriter{
auth: auth,
payload: make([]byte, 1024),
buffer: buf.NewLocal(readerBufferSize),
writer: writer,
sizeParser: sizeParser,
mode: mode,
}
}
@ -211,7 +228,7 @@ func (w *AuthenticationWriter) flush() error {
return err
}
func (w *AuthenticationWriter) Write(mb buf.MultiBuffer) error {
func (w *AuthenticationWriter) writeStream(mb buf.MultiBuffer) error {
defer mb.Release()
for {
@ -232,3 +249,39 @@ func (w *AuthenticationWriter) Write(mb buf.MultiBuffer) error {
}
return nil
}
func (w *AuthenticationWriter) writePacket(mb buf.MultiBuffer) error {
defer mb.Release()
for {
b := mb.SplitFirst()
if b == nil {
b = buf.New()
}
if w.buffer.Len() > readerBufferSize-b.Len()-128 {
if err := w.flush(); err != nil {
b.Release()
return err
}
}
w.append(b.Bytes())
b.Release()
if mb.IsEmpty() {
break
}
}
if !w.buffer.IsEmpty() {
return w.flush()
}
return nil
}
func (w *AuthenticationWriter) Write(mb buf.MultiBuffer) error {
if w.mode == ModeStream {
return w.writeStream(mb)
}
return w.writePacket(mb)
}

62
common/crypto/auth_test.go
View File

@ -39,7 +39,7 @@ func TestAuthenticationReaderWriter(t *testing.T) {
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
}, PlainChunkSizeParser{}, cache)
}, PlainChunkSizeParser{}, cache, ModeStream)
assert.Error(writer.Write(buf.NewMultiBufferValue(payload))).IsNil()
assert.Int(cache.Len()).Equals(83360)
@ -52,7 +52,7 @@ func TestAuthenticationReaderWriter(t *testing.T) {
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
}, PlainChunkSizeParser{}, cache)
}, PlainChunkSizeParser{}, cache, ModeStream)
mb := buf.NewMultiBuffer()
@ -70,3 +70,61 @@ func TestAuthenticationReaderWriter(t *testing.T) {
_, err = reader.Read()
assert.Error(err).Equals(io.EOF)
}
func TestAuthenticationReaderWriterPacket(t *testing.T) {
assert := assert.On(t)
key := make([]byte, 16)
rand.Read(key)
block, err := aes.NewCipher(key)
assert.Error(err).IsNil()
aead, err := cipher.NewGCM(block)
assert.Error(err).IsNil()
cache := buf.NewLocal(1024)
iv := make([]byte, 12)
rand.Read(iv)
writer := NewAuthenticationWriter(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
}, PlainChunkSizeParser{}, cache, ModePacket)
payload := buf.NewMultiBuffer()
pb1 := buf.New()
pb1.Append([]byte("abcd"))
payload.Append(pb1)
pb2 := buf.New()
pb2.Append([]byte("efgh"))
payload.Append(pb2)
assert.Error(writer.Write(payload)).IsNil()
assert.Int(cache.Len()).GreaterThan(0)
assert.Error(writer.Write(buf.NewMultiBuffer())).IsNil()
assert.Error(err).IsNil()
reader := NewAuthenticationReader(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
}, PlainChunkSizeParser{}, cache, ModePacket)
mb, err := reader.Read()
assert.Error(err).IsNil()
b1 := mb.SplitFirst()
assert.String(b1.String()).Equals("abcd")
b2 := mb.SplitFirst()
assert.String(b2.String()).Equals("efgh")
assert.Bool(mb.IsEmpty()).IsTrue()
_, err = reader.Read()
assert.Error(err).Equals(io.EOF)
}

30
proxy/vmess/encoding/auth.go
View File

@ -6,6 +6,8 @@ import (
"golang.org/x/crypto/sha3"
"v2ray.com/core/common/crypto"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/serial"
)
@ -16,6 +18,26 @@ func Authenticate(b []byte) uint32 {
return fnv1hash.Sum32()
}
type NoOpAuthenticator struct{}
func (NoOpAuthenticator) NonceSize() int {
return 0
}
func (NoOpAuthenticator) Overhead() int {
return 0
}
// Seal implements AEAD.Seal().
func (NoOpAuthenticator) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
return append(dst[:0], plaintext...)
}
// Open implements AEAD.Open().
func (NoOpAuthenticator) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
return append(dst[:0], ciphertext...), nil
}
// FnvAuthenticator is an AEAD based on Fnv hash.
type FnvAuthenticator struct {
}
@ -86,3 +108,11 @@ func (s *ShakeSizeParser) Encode(size uint16, b []byte) []byte {
mask := s.next()
return serial.Uint16ToBytes(mask^size, b[:0])
}
func GetStreamMode(request *protocol.RequestHeader) crypto.StreamMode {
if request.Command == protocol.RequestCommandTCP {
return crypto.ModeStream
}
return crypto.ModePacket
}

34
proxy/vmess/encoding/client.go
View File

@ -123,7 +123,15 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
}
if request.Security.Is(protocol.SecurityType_NONE) {
if request.Option.Has(protocol.RequestOptionChunkStream) {
return crypto.NewChunkStreamWriter(sizeParser, writer)
if request.Command == protocol.RequestCommandTCP {
return crypto.NewChunkStreamWriter(sizeParser, writer)
}
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, crypto.ModePacket)
}
return buf.NewWriter(writer)
@ -138,7 +146,7 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, cryptionWriter)
return crypto.NewAuthenticationWriter(auth, sizeParser, cryptionWriter, GetStreamMode(request))
}
return buf.NewWriter(cryptionWriter)
@ -156,7 +164,7 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer)
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, GetStreamMode(request))
}
if request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
@ -170,7 +178,7 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer)
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, GetStreamMode(request))
}
panic("Unknown security type.")
@ -221,7 +229,17 @@ func (v *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
}
if request.Security.Is(protocol.SecurityType_NONE) {
if request.Option.Has(protocol.RequestOptionChunkStream) {
return crypto.NewChunkStreamReader(sizeParser, reader)
if request.Command == protocol.RequestCommandTCP {
return crypto.NewChunkStreamReader(sizeParser, reader)
}
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, crypto.ModePacket)
}
return buf.NewReader(reader)
@ -234,7 +252,7 @@ func (v *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, v.responseReader)
return crypto.NewAuthenticationReader(auth, sizeParser, v.responseReader, GetStreamMode(request))
}
return buf.NewReader(v.responseReader)
@ -252,7 +270,7 @@ func (v *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader)
return crypto.NewAuthenticationReader(auth, sizeParser, reader, GetStreamMode(request))
}
if request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
@ -266,7 +284,7 @@ func (v *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader)
return crypto.NewAuthenticationReader(auth, sizeParser, reader, GetStreamMode(request))
}
panic("Unknown security type.")

34
proxy/vmess/encoding/server.go
View File

@ -240,7 +240,16 @@ func (v *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
}
if request.Security.Is(protocol.SecurityType_NONE) {
if request.Option.Has(protocol.RequestOptionChunkStream) {
return crypto.NewChunkStreamReader(sizeParser, reader)
if request.Command == protocol.RequestCommandTCP {
return crypto.NewChunkStreamReader(sizeParser, reader)
}
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, crypto.ModePacket)
}
return buf.NewReader(reader)
@ -255,7 +264,7 @@ func (v *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, cryptionReader)
return crypto.NewAuthenticationReader(auth, sizeParser, cryptionReader, GetStreamMode(request))
}
return buf.NewReader(cryptionReader)
@ -273,7 +282,7 @@ func (v *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader)
return crypto.NewAuthenticationReader(auth, sizeParser, reader, GetStreamMode(request))
}
if request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
@ -287,7 +296,7 @@ func (v *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader)
return crypto.NewAuthenticationReader(auth, sizeParser, reader, GetStreamMode(request))
}
panic("Unknown security type.")
@ -317,7 +326,16 @@ func (v *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
}
if request.Security.Is(protocol.SecurityType_NONE) {
if request.Option.Has(protocol.RequestOptionChunkStream) {
return crypto.NewChunkStreamWriter(sizeParser, writer)
if request.Command == protocol.RequestCommandTCP {
return crypto.NewChunkStreamWriter(sizeParser, writer)
}
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: &crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, crypto.ModePacket)
}
return buf.NewWriter(writer)
@ -330,7 +348,7 @@ func (v *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, v.responseWriter)
return crypto.NewAuthenticationWriter(auth, sizeParser, v.responseWriter, GetStreamMode(request))
}
return buf.NewWriter(v.responseWriter)
@ -348,7 +366,7 @@ func (v *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer)
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, GetStreamMode(request))
}
if request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
@ -362,7 +380,7 @@ func (v *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer)
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, GetStreamMode(request))
}
panic("Unknown security type.")