Method readServerFinished

handshake_client_tls13.go:497–541

()

}

func (hs *clientHandshakeStateTLS13) readServerFinished() error {
	c := hs.c

	msg, err := c.readHandshake()
	if err != nil {
		return err
	}

	finished, ok := msg.(*finishedMsg)
	if !ok {
		c.sendAlert(alertUnexpectedMessage)
		return unexpectedMessageError(finished, msg)
	}

	expectedMAC := hs.suite.finishedHash(c.in.trafficSecret, hs.transcript)
	if !hmac.Equal(expectedMAC, finished.verifyData) {
		c.sendAlert(alertDecryptError)
		return errors.New("tls: invalid server finished hash")
	}

	hs.transcript.Write(finished.marshal())

	// Derive secrets that take context through the server Finished.

	hs.trafficSecret = hs.suite.deriveSecret(hs.masterSecret,
		clientApplicationTrafficLabel, hs.transcript)
	serverSecret := hs.suite.deriveSecret(hs.masterSecret,
		serverApplicationTrafficLabel, hs.transcript)
	c.in.setTrafficSecret(hs.suite, serverSecret)

	err = c.config.writeKeyLog(keyLogLabelClientTraffic, hs.hello.random, hs.trafficSecret)
	if err != nil {
		c.sendAlert(alertInternalError)
		return err
	}
	err = c.config.writeKeyLog(keyLogLabelServerTraffic, hs.hello.random, serverSecret)
	if err != nil {
		c.sendAlert(alertInternalError)
		return err
	}

	c.ekm = hs.suite.exportKeyingMaterial(hs.masterSecret, hs.transcript)

	return nil
}

func (hs *clientHandshakeStateTLS13) sendClientCertificate() error {
	c := hs.c