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fix UDP handling in Shadowsocks client

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This commit is contained in:
Darien Raymond
2018-01-19 11:08:34 +01:00
parent 0e01e28278
commit 4b5e41c783
2 changed files with 10 additions and 1 deletions
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9
proxy/shadowsocks/config.go
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@@ -140,6 +140,9 @@ func (v *AesCfb) EncodePacket(key []byte, b *buf.Buffer) error {
}
func (v *AesCfb) DecodePacket(key []byte, b *buf.Buffer) error {
if b.Len() <= v.IVSize() {
return newError("insufficient data: ", b.Len())
}
iv := b.BytesTo(v.IVSize())
stream := crypto.NewAesDecryptionStream(key, iv)
stream.XORKeyStream(b.BytesFrom(v.IVSize()), b.BytesFrom(v.IVSize()))
@@ -203,6 +206,9 @@ func (c *AEADCipher) EncodePacket(key []byte, b *buf.Buffer) error {
}
func (c *AEADCipher) DecodePacket(key []byte, b *buf.Buffer) error {
if b.Len() <= v.IVSize() {
return newError("insufficient data: ", b.Len())
}
ivLen := c.IVSize()
payloadLen := b.Len()
auth := c.createAuthenticator(key, b.BytesTo(ivLen))
@@ -253,6 +259,9 @@ func (v *ChaCha20) EncodePacket(key []byte, b *buf.Buffer) error {
}
func (v *ChaCha20) DecodePacket(key []byte, b *buf.Buffer) error {
if b.Len() <= v.IVSize() {
return newError("insufficient data: ", b.Len())
}
iv := b.BytesTo(v.IVSize())
stream := crypto.NewChaCha20Stream(key, iv)
stream.XORKeyStream(b.BytesFrom(v.IVSize()), b.BytesFrom(v.IVSize()))