ntlmcontext.java

实现网上邻居需要的jar库；可以使用库中的接口实现文件共享的功能

/* jcifs smb client library in Java
 * Copyright (C) 2008  "Michael B. Allen" <jcifs at samba dot org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb;

import java.io.IOException;
import java.security.*;
import jcifs.ntlmssp.*;

public class NtlmContext {

    NtlmPasswordAuthentication auth;
    int ntlmsspFlags;
    String workstation;
    boolean isEstablished = false;
    byte[] serverChallenge = null;
    byte[] signingKey = null;
    int state = 1;

    public NtlmContext(NtlmPasswordAuthentication auth, boolean doSigning) {
        this.auth = auth;
        this.ntlmsspFlags = ntlmsspFlags |
                NtlmFlags.NTLMSSP_REQUEST_TARGET |
                NtlmFlags.NTLMSSP_NEGOTIATE_NTLM2 |
                NtlmFlags.NTLMSSP_NEGOTIATE_128;
        if (doSigning) {
            this.ntlmsspFlags |= NtlmFlags.NTLMSSP_NEGOTIATE_SIGN |
                NtlmFlags.NTLMSSP_NEGOTIATE_ALWAYS_SIGN |
                NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH;
        }
        this.workstation = Type1Message.getDefaultWorkstation();
    }

    public boolean isEstablished() {
        return isEstablished;
    }
    public byte[] getServerChallenge()
    {
        return serverChallenge;
    }
    public byte[] getSigningKey()
    {
        return signingKey;
    }

    public byte[] initSecContext(byte[] token, int offset, int len) throws SmbException {
        switch (state) {
            case 1:
                Type1Message msg1 = new Type1Message(ntlmsspFlags, auth.getDomain(), workstation);
                token = msg1.toByteArray();
                state++;
                break;
            case 2:
                try {
                    Type2Message msg2 = new Type2Message(token);

                    serverChallenge = msg2.getChallenge();
                    ntlmsspFlags &= msg2.getFlags();

                    Type3Message msg3 = new Type3Message(msg2,
                                auth.getPassword(),
                                auth.getDomain(),
                                auth.getUsername(),
                                workstation,
                                ntlmsspFlags);
                    token = msg3.toByteArray();

                    if ((ntlmsspFlags & NtlmFlags.NTLMSSP_NEGOTIATE_SIGN) != 0)
                        signingKey = msg3.getMasterKey();

                    isEstablished = true;
                    state++;
                    break;
                } catch (Exception e) {
                    throw new SmbException(e.getMessage(), e);
                }
            default:
                throw new SmbException("Invalid state");
        }
        return token;
    }
}