Method handleKeyUpdate

conn.go:1401–1436

(keyUpdate *keyUpdateMsg)

}

func (c *Conn) handleKeyUpdate(keyUpdate *keyUpdateMsg) error {
	if c.quic != nil {
		c.sendAlert(alertUnexpectedMessage)
		return c.in.setErrorLocked(errors.New("tls: received unexpected key update message"))
	}

	cipherSuite := cipherSuiteTLS13ByID(c.cipherSuite)
	if cipherSuite == nil {
		return c.in.setErrorLocked(c.sendAlert(alertInternalError))
	}

	newSecret := cipherSuite.nextTrafficSecret(c.in.trafficSecret)
	c.in.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret)

	if keyUpdate.updateRequested {
		c.out.Lock()
		defer c.out.Unlock()

		msg := &keyUpdateMsg{}
		msgBytes, err := msg.marshal()
		if err != nil {
			return err
		}
		_, err = c.writeRecordLocked(recordTypeHandshake, msgBytes)
		if err != nil {
			// Surface the error at the next write.
			c.out.setErrorLocked(err)
			return nil
		}

		newSecret := cipherSuite.nextTrafficSecret(c.out.trafficSecret)
		c.out.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret)
	}

	return nil
}

// Read reads data from the connection.
//