beginHandshake() — netty Function Reference

Source Code

handler/src/main/java/io/netty/handler/ssl/ReferenceCountedOpenSslEngine.java lines 1868–1900

    @Override
    public final synchronized void beginHandshake() throws SSLException {
        switch (handshakeState) {
            case STARTED_IMPLICITLY:
                checkEngineClosed();

                // A user did not start handshake by calling this method by him/herself,
                // but handshake has been started already by wrap() or unwrap() implicitly.
                // Because it's the user's first time to call this method, it is unfair to
                // raise an exception.  From the user's standpoint, he or she never asked
                // for renegotiation.

                handshakeState = HandshakeState.STARTED_EXPLICITLY; // Next time this method is invoked by the user,
                calculateMaxWrapOverhead();
                // we should raise an exception.
                break;
            case STARTED_EXPLICITLY:
                // Nothing to do as the handshake is not done yet.
                break;
            case FINISHED:
                throw new SSLException("renegotiation unsupported");
            case NOT_STARTED:
                handshakeState = HandshakeState.STARTED_EXPLICITLY;
                if (handshake() == NEED_TASK) {
                    // Set needTask to true so getHandshakeStatus() will return the correct value.
                    needTask = true;
                }
                calculateMaxWrapOverhead();
                break;
            default:
                throw new Error("Unexpected handshake state: " + handshakeState);
        }
    }