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simplify BytesGenerator

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This commit is contained in:
Darien Raymond 2018-04-14 13:10:12 +02:00
parent f175d322ae
commit 66ed1bab2a
No known key found for this signature in database
GPG Key ID: 7251FFA14BB18169
5 changed files with 91 additions and 133 deletions
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64
common/crypto/auth.go
View File

@ -9,44 +9,36 @@ import (
"v2ray.com/core/common/protocol"
)
type BytesGenerator interface {
Next() []byte
}
type BytesGenerator func() []byte
type NoOpBytesGenerator struct {
buffer [1]byte
}
func (v NoOpBytesGenerator) Next() []byte {
return v.buffer[:0]
}
type StaticBytesGenerator struct {
Content []byte
}
func (v StaticBytesGenerator) Next() []byte {
return v.Content
}
type IncreasingAEADNonceGenerator struct {
nonce []byte
}
func NewIncreasingAEADNonceGenerator() *IncreasingAEADNonceGenerator {
return &IncreasingAEADNonceGenerator{
nonce: []byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
func GenerateEmptyBytes() BytesGenerator {
var b [1]byte
return func() []byte {
return b[:0]
}
}
func (g *IncreasingAEADNonceGenerator) Next() []byte {
for i := range g.nonce {
g.nonce[i]++
if g.nonce[i] != 0 {
break
func GenerateStaticBytes(content []byte) BytesGenerator {
return func() []byte {
return content
}
}
func GenerateIncreasingNonce(nonce []byte) BytesGenerator {
c := append([]byte(nil), nonce...)
return func() []byte {
for i := range c {
c[i]++
if c[i] != 0 {
break
}
}
return c
}
return g.nonce
}
func GenerateInitialAEADNonce() BytesGenerator {
return GenerateIncreasingNonce([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF})
}
type Authenticator interface {
@ -63,27 +55,27 @@ type AEADAuthenticator struct {
}
func (v *AEADAuthenticator) Open(dst, cipherText []byte) ([]byte, error) {
iv := v.NonceGenerator.Next()
iv := v.NonceGenerator()
if len(iv) != v.AEAD.NonceSize() {
return nil, newError("invalid AEAD nonce size: ", len(iv))
}
var additionalData []byte
if v.AdditionalDataGenerator != nil {
additionalData = v.AdditionalDataGenerator.Next()
additionalData = v.AdditionalDataGenerator()
}
return v.AEAD.Open(dst, iv, cipherText, additionalData)
}
func (v *AEADAuthenticator) Seal(dst, plainText []byte) ([]byte, error) {
iv := v.NonceGenerator.Next()
iv := v.NonceGenerator()
if len(iv) != v.AEAD.NonceSize() {
return nil, newError("invalid AEAD nonce size: ", len(iv))
}
var additionalData []byte
if v.AdditionalDataGenerator != nil {
additionalData = v.AdditionalDataGenerator.Next()
additionalData = v.AdditionalDataGenerator()
}
return v.AEAD.Seal(dst, iv, plainText, additionalData), nil
}

32
common/crypto/auth_test.go
View File

@ -37,11 +37,9 @@ func TestAuthenticationReaderWriter(t *testing.T) {
rand.Read(iv)
writer := NewAuthenticationWriter(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateStaticBytes(iv),
AdditionalDataGenerator: GenerateEmptyBytes(),
}, PlainChunkSizeParser{}, cache, protocol.TransferTypeStream)
assert(writer.WriteMultiBuffer(buf.NewMultiBufferValue(payload)), IsNil)
@ -49,11 +47,9 @@ func TestAuthenticationReaderWriter(t *testing.T) {
assert(writer.WriteMultiBuffer(buf.MultiBuffer{}), IsNil)
reader := NewAuthenticationReader(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateStaticBytes(iv),
AdditionalDataGenerator: GenerateEmptyBytes(),
}, PlainChunkSizeParser{}, cache, protocol.TransferTypeStream)
var mb buf.MultiBuffer
@ -91,11 +87,9 @@ func TestAuthenticationReaderWriterPacket(t *testing.T) {
rand.Read(iv)
writer := NewAuthenticationWriter(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateStaticBytes(iv),
AdditionalDataGenerator: GenerateEmptyBytes(),
}, PlainChunkSizeParser{}, cache, protocol.TransferTypePacket)
var payload buf.MultiBuffer
@ -113,11 +107,9 @@ func TestAuthenticationReaderWriterPacket(t *testing.T) {
assert(err, IsNil)
reader := NewAuthenticationReader(&AEADAuthenticator{
AEAD: aead,
NonceGenerator: &StaticBytesGenerator{
Content: iv,
},
AdditionalDataGenerator: &NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateStaticBytes(iv),
AdditionalDataGenerator: GenerateEmptyBytes(),
}, PlainChunkSizeParser{}, cache, protocol.TransferTypePacket)
mb, err := reader.ReadMultiBuffer()

2
proxy/shadowsocks/config.go
View File

@ -169,7 +169,7 @@ func (c *AEADCipher) IVSize() int32 {
}
func (c *AEADCipher) createAuthenticator(key []byte, iv []byte) *crypto.AEADAuthenticator {
nonce := crypto.NewIncreasingAEADNonceGenerator()
nonce := crypto.GenerateInitialAEADNonce()
subkey := make([]byte, c.KeyBytes)
hkdfSHA1(key, iv, subkey)
return &crypto.AEADAuthenticator{

70
proxy/vmess/encoding/client.go
View File

@ -120,8 +120,8 @@ func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
}
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, protocol.TransferTypePacket)
}
@ -133,8 +133,8 @@ func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
if request.Option.Has(protocol.RequestOptionChunkStream) {
auth := &crypto.AEADAuthenticator{
AEAD: new(FnvAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, cryptionWriter, request.Command.TransferType())
}
@ -145,24 +145,18 @@ func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
aead, _ := cipher.NewGCM(block)
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), c.requestBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(c.requestBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType())
case protocol.SecurityType_CHACHA20_POLY1305:
aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(c.requestBodyKey))
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), c.requestBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(c.requestBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType())
default:
@ -219,8 +213,8 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, protocol.TransferTypePacket)
@ -231,8 +225,8 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
if request.Option.Has(protocol.RequestOptionChunkStream) {
auth := &crypto.AEADAuthenticator{
AEAD: new(FnvAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, c.responseReader, request.Command.TransferType())
}
@ -243,24 +237,18 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
aead, _ := cipher.NewGCM(block)
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), c.responseBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(c.responseBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType())
case protocol.SecurityType_CHACHA20_POLY1305:
aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(c.responseBodyKey))
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), c.responseBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(c.responseBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType())
default:
@ -268,14 +256,12 @@ func (c *ClientSession) DecodeResponseBody(request *protocol.RequestHeader, read
}
}
type ChunkNonceGenerator struct {
Nonce []byte
Size int
count uint16
}
func (g *ChunkNonceGenerator) Next() []byte {
serial.Uint16ToBytes(g.count, g.Nonce[:0])
g.count++
return g.Nonce[:g.Size]
func GenerateChunkNonce(nonce []byte, size uint32) crypto.BytesGenerator {
c := append([]byte(nil), nonce...)
count := uint16(0)
return func() []byte {
serial.Uint16ToBytes(count, c[:0])
count++
return c[:size]
}
}

56
proxy/vmess/encoding/server.go
View File

@ -9,13 +9,13 @@ import (
"sync"
"time"
"v2ray.com/core/common/dice"
"golang.org/x/crypto/chacha20poly1305"
"v2ray.com/core/common"
"v2ray.com/core/common/bitmask"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/crypto"
"v2ray.com/core/common/dice"
"v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/serial"
@ -238,8 +238,8 @@ func (s *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, protocol.TransferTypePacket)
}
@ -251,8 +251,8 @@ func (s *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
if request.Option.Has(protocol.RequestOptionChunkStream) {
auth := &crypto.AEADAuthenticator{
AEAD: new(FnvAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, cryptionReader, request.Command.TransferType())
}
@ -263,24 +263,18 @@ func (s *ServerSession) DecodeRequestBody(request *protocol.RequestHeader, reade
aead, _ := cipher.NewGCM(block)
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), s.requestBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(s.requestBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType())
case protocol.SecurityType_CHACHA20_POLY1305:
aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(s.requestBodyKey))
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), s.requestBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(s.requestBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationReader(auth, sizeParser, reader, request.Command.TransferType())
default:
@ -319,8 +313,8 @@ func (s *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
auth := &crypto.AEADAuthenticator{
AEAD: new(NoOpAuthenticator),
NonceGenerator: &crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, protocol.TransferTypePacket)
}
@ -330,8 +324,8 @@ func (s *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
if request.Option.Has(protocol.RequestOptionChunkStream) {
auth := &crypto.AEADAuthenticator{
AEAD: new(FnvAuthenticator),
NonceGenerator: crypto.NoOpBytesGenerator{},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
NonceGenerator: crypto.GenerateEmptyBytes(),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, s.responseWriter, request.Command.TransferType())
}
@ -342,24 +336,18 @@ func (s *ServerSession) EncodeResponseBody(request *protocol.RequestHeader, writ
aead, _ := cipher.NewGCM(block)
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), s.responseBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(s.responseBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType())
case protocol.SecurityType_CHACHA20_POLY1305:
aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(s.responseBodyKey))
auth := &crypto.AEADAuthenticator{
AEAD: aead,
NonceGenerator: &ChunkNonceGenerator{
Nonce: append([]byte(nil), s.responseBodyIV...),
Size: aead.NonceSize(),
},
AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
AEAD: aead,
NonceGenerator: GenerateChunkNonce(s.responseBodyIV, uint32(aead.NonceSize())),
AdditionalDataGenerator: crypto.GenerateEmptyBytes(),
}
return crypto.NewAuthenticationWriter(auth, sizeParser, writer, request.Command.TransferType())
default: