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lazy init of authenticator

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Darien Raymond 2017-11-29 23:08:02 +01:00
parent f6bb214d30
commit 3aa5102036
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GPG Key ID: 7251FFA14BB18169
1 changed files with 1 additions and 2 deletions
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3
proxy/shadowsocks/protocol.go
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@ -299,7 +299,6 @@ func DecodeUDPPacket(user *protocol.User, payload *buf.Buffer) (*protocol.Reques
account := rawAccount.(*MemoryAccount) account := rawAccount.(*MemoryAccount)
var iv []byte var iv []byte
var authenticator *Authenticator
if !account.Cipher.IsAEAD() && account.Cipher.IVSize() > 0 { if !account.Cipher.IsAEAD() && account.Cipher.IVSize() > 0 {
// Keep track of IV as it gets removed from payload in DecodePacket. // Keep track of IV as it gets removed from payload in DecodePacket.
iv = make([]byte, account.Cipher.IVSize()) iv = make([]byte, account.Cipher.IVSize())
@ -333,7 +332,7 @@ func DecodeUDPPacket(user *protocol.User, payload *buf.Buffer) (*protocol.Reques
payloadLen := payload.Len() - AuthSize payloadLen := payload.Len() - AuthSize
authBytes := payload.BytesFrom(payloadLen) authBytes := payload.BytesFrom(payloadLen)
authenticator = NewAuthenticator(HeaderKeyGenerator(account.Key, iv)) authenticator := NewAuthenticator(HeaderKeyGenerator(account.Key, iv))
actualAuth := make([]byte, AuthSize) actualAuth := make([]byte, AuthSize)
authenticator.Authenticate(payload.BytesTo(payloadLen))(actualAuth) authenticator.Authenticate(payload.BytesTo(payloadLen))(actualAuth)
if !bytes.Equal(actualAuth, authBytes) { if !bytes.Equal(actualAuth, authBytes) {