diff options
Diffstat (limited to 'src/crypto/tls/handshake_client_tls13.go')
| -rw-r--r-- | src/crypto/tls/handshake_client_tls13.go | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/src/crypto/tls/handshake_client_tls13.go b/src/crypto/tls/handshake_client_tls13.go index be37c681c6..eb59ac90d1 100644 --- a/src/crypto/tls/handshake_client_tls13.go +++ b/src/crypto/tls/handshake_client_tls13.go @@ -396,17 +396,11 @@ func (hs *clientHandshakeStateTLS13) readServerParameters() error { } hs.transcript.Write(encryptedExtensions.marshal()) - if encryptedExtensions.alpnProtocol != "" { - if len(hs.hello.alpnProtocols) == 0 { - c.sendAlert(alertUnsupportedExtension) - return errors.New("tls: server advertised unrequested ALPN extension") - } - if mutualProtocol([]string{encryptedExtensions.alpnProtocol}, hs.hello.alpnProtocols) == "" { - c.sendAlert(alertUnsupportedExtension) - return errors.New("tls: server selected unadvertised ALPN protocol") - } - c.clientProtocol = encryptedExtensions.alpnProtocol + if err := checkALPN(hs.hello.alpnProtocols, encryptedExtensions.alpnProtocol); err != nil { + c.sendAlert(alertUnsupportedExtension) + return err } + c.clientProtocol = encryptedExtensions.alpnProtocol return nil } |