import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;

/**
 * Represents an NTLMSSP Type-2 message.
 */
public class Type2Message extends NtlmMessage {

    private static final Logger log = LoggerFactory.getLogger(Type2Message.class);

    private byte[] challenge;
    private String target;
    private byte[] context;
    private byte[] targetInformation;

     * environment.
     */
    public Type2Message() {
        this(getDefaultFlags(), null, null);
    }

    /**
     * Creates a Type-2 message in response to the given Type-1 message
     * using default values from the current environment.
     *
     * @param type1 The Type-1 message which this represents a response to.
     */
    public Type2Message(final Type1Message type1) {
        this(type1, null, null);

                | NtlmFlags.NTLMSSP_NEGOTIATE_SIGN;
        Type2Message type2Message = new Type2Message(type2Flags, serverChallenge, domain);
        byte[] type2Token = type2Message.toByteArray();

        // State 2: Process Type 2 and generate Type 3
        byte[] type3Token = context.initSecContext(type2Token, 0, type2Token.length);

            Type2Message originalMessage = new Type2Message(mockContext,
                    Type2Message.NTLMSSP_NEGOTIATE_UNICODE | Type2Message.NTLMSSP_NEGOTIATE_VERSION | Type2Message.NTLMSSP_REQUEST_TARGET,
                    TEST_CHALLENGE, TEST_TARGET);
            byte[] rawMessage = originalMessage.toByteArray();

            // When
            Type2Message parsedMessage = new Type2Message(rawMessage);

     */
    private Type2Message createMockType2Message() {
        // Create a basic Type 2 message with challenge
        byte[] challenge = new byte[8];
        new SecureRandom().nextBytes(challenge);

        int flags = NtlmFlags.NTLMSSP_NEGOTIATE_UNICODE | NtlmFlags.NTLMSSP_NEGOTIATE_NTLM;

        return new Type2Message(createMockContext(), flags, challenge, "TARGET");
    }

            final String challenge) throws NTLMEngineException {
        Type2Message type2Message;
        try {
            type2Message = new Type2Message(Base64.getDecoder().decode(challenge));
        } catch (final IOException exception) {
            throw new NTLMEngineException("Invalid NTLM type 2 message", exception);
        }
        final int type2Flags = type2Message.getFlags();

            final byte[] src = Base64.decode(msg.substring(5));
            if (src[8] == 1) {
                final Type1Message type1 = new Type1Message(src);
                final Type2Message type2 = new Type2Message(tc, type1, challenge, null);
                msg = new String(Base64.encode(type2.toByteArray()), "US-ASCII");
                resp.setHeader("WWW-Authenticate", "NTLM " + msg);
            } else if (src[8] == 3) {

     * @throws SmbException if an error occurs during message creation
     */
    protected byte[] makeAuthenticate(final byte[] token) throws SmbException {
        try {
            final Type2Message msg2 = new Type2Message(token);

            if (log.isTraceEnabled()) {
                log.trace(msg2.toString());
                log.trace(Hexdump.toHexString(token));
            }

     * @throws GeneralSecurityException if a cryptographic error occurs
     * @throws CIFSException if a CIFS protocol error occurs
     */
    public Type3Message(final CIFSContext tc, final Type2Message type2, final String targetName, final String password, final String domain,
            final String user, final String workstation, final int flags) throws GeneralSecurityException, CIFSException {

                    user = auth.getUserName();
                    password = new String(auth.getPassword());
                } catch (final Exception ex) {}
            }
            final Type2Message type2 = (Type2Message) message;
            message = new Type3Message(type2, password, domain, user, Type3Message.getDefaultWorkstation(), 0);
        }
        return message;
    }