ntlmpasswordauthentication.java.orig

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) 2002  "Michael B. Allen" <jcifs at samba dot org>
 *                  "Eric Glass" <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.UnsupportedEncodingException;
import java.io.Serializable;
import java.security.Principal;
import java.util.Random;
import java.util.Arrays;
import jcifs.Config;
import jcifs.util.*;

/**
 * This class stores and encrypts NTLM user credentials. The default
 * credentials are retrieved from the <tt>jcifs.smb.client.domain</tt>,
 * <tt>jcifs.smb.client.username</tt>, and <tt>jcifs.smb.client.password</tt>
 * properties.
 * <p>
 * Read <a href="../../../authhandler.html">jCIFS Exceptions and
 * NtlmAuthenticator</a> for related information.
 */

public final class NtlmPasswordAuthentication implements Principal, Serializable {

    private static final int LM_COMPATIBILITY =
            Config.getInt("jcifs.smb.lmCompatibility", 0);

    private static final Random RANDOM = new Random();

    private static LogStream log = LogStream.getInstance();

    // KGS!@#$%
    private static final byte[] S8 = {
        (byte)0x4b, (byte)0x47, (byte)0x53, (byte)0x21,
        (byte)0x40, (byte)0x23, (byte)0x24, (byte)0x25
    };
    private static void E( byte[] key, byte[] data, byte[] e ) {
        byte[] key7 = new byte[7];
        byte[] e8 = new byte[8];

        for( int i = 0; i < key.length / 7; i++ ) {
            System.arraycopy( key, i * 7, key7, 0, 7 );
            DES des = new DES( key7 );
            des.encrypt( data, e8 );
            System.arraycopy( e8, 0, e, i * 8, 8 );
        }
    }

    static String DEFAULT_DOMAIN;
    static String DEFAULT_USERNAME;
    static String DEFAULT_PASSWORD;
    static final String BLANK = "";

    static void initDefaults() {
        if (DEFAULT_DOMAIN != null) return;
        DEFAULT_DOMAIN = Config.getProperty("jcifs.smb.client.domain", "?");
        DEFAULT_USERNAME = Config.getProperty("jcifs.smb.client.username", "GUEST");
        DEFAULT_PASSWORD = Config.getProperty("jcifs.smb.client.password", BLANK);
    }

/**
 * Generate the ANSI DES hash for the password associated with these credentials.
 */
    static public byte[] getPreNTLMResponse( String password, byte[] challenge ) {
        byte[] p14 = new byte[14];
        byte[] p21 = new byte[21];
        byte[] p24 = new byte[24];
        byte[] passwordBytes;
        try {
            passwordBytes = password.toUpperCase().getBytes( ServerMessageBlock.OEM_ENCODING );
        } catch( UnsupportedEncodingException uee ) {
            throw new RuntimeException("Try setting jcifs.encoding=US-ASCII", uee);
        }
        int passwordLength = passwordBytes.length;

        // Only encrypt the first 14 bytes of the password for Pre 0.12 NT LM
        if( passwordLength > 14) {
            passwordLength = 14;
        }
        System.arraycopy( passwordBytes, 0, p14, 0, passwordLength );
        E( p14, S8, p21);
        E( p21, challenge, p24);
        return p24;
    }
/**
 * Generate the Unicode MD4 hash for the password associated with these credentials.
 */
    static public byte[] getNTLMResponse( String password, byte[] challenge ) {
        byte[] uni = null;
        byte[] p21 = new byte[21];
        byte[] p24 = new byte[24];

        try {
            uni = password.getBytes( "UnicodeLittleUnmarked" );
        } catch( UnsupportedEncodingException uee ) {
            if( log.level > 0 )
                uee.printStackTrace( log );
        }
        MD4 md4 = new MD4();
        md4.update( uni );
        try {
            md4.digest(p21, 0, 16);
        } catch (Exception ex) {
            if( log.level > 0 )
                ex.printStackTrace( log );
        }
        E( p21, challenge, p24 );
        return p24;
    }

    /**
     * Creates the LMv2 response for the supplied information.
     *
     * @param domain The domain in which the username exists.
     * @param user The username.
     * @param password The user's password.
     * @param challenge The server challenge.
     * @param clientChallenge The client challenge (nonce). 
     */ 
    public static byte[] getLMv2Response(String domain, String user,
            String password, byte[] challenge, byte[] clientChallenge) {
        try {
            byte[] hash = new byte[16];
            byte[] response = new byte[24];
            MD4 md4 = new MD4();
            md4.update(password.getBytes("UnicodeLittleUnmarked"));
            HMACT64 hmac = new HMACT64(md4.digest());
            hmac.update(user.toUpperCase().getBytes("UnicodeLittleUnmarked"));
            hmac.update(domain.toUpperCase().getBytes("UnicodeLittleUnmarked"));
            hmac = new HMACT64(hmac.digest());
            hmac.update(challenge);
            hmac.update(clientChallenge);
            hmac.digest(response, 0, 16);
            System.arraycopy(clientChallenge, 0, response, 16, 8);
            return response;
        } catch (Exception ex) {
            if( log.level > 0 )
                ex.printStackTrace( log );
            return null;
        }
    }

    static final NtlmPasswordAuthentication NULL =
                new NtlmPasswordAuthentication( "", "", "" );
    static final NtlmPasswordAuthentication GUEST =
                new NtlmPasswordAuthentication( "?", "GUEST", "" );
    static final NtlmPasswordAuthentication DEFAULT =
                new NtlmPasswordAuthentication( null );

    String domain;
    String username;
    String password;
    byte[] ansiHash;
    byte[] unicodeHash;
    boolean hashesExternal = false;
    byte[] clientChallenge = null;
    byte[] challenge = null;

/**
 * Create an <tt>NtlmPasswordAuthentication</tt> object from the userinfo
 * component of an SMB URL like "<tt>domain;user:pass</tt>". This constructor
 * is used internally be jCIFS when parsing SMB URLs.
 */

    public NtlmPasswordAuthentication( String userInfo ) {
        domain = username = password = null;

        if( userInfo != null ) {
            int i, u, end;
            char c;

            end = userInfo.length();
            for( i = 0, u = 0; i < end; i++ ) {
                c = userInfo.charAt( i );
                if( c == ';' ) {
                    domain = userInfo.substring( 0, i );
                    u = i + 1;
                } else if( c == ':' ) {
                    password = userInfo.substring( i + 1 );
                    break;
                }
            }
            username = userInfo.substring( u, i );
        }

        initDefaults();

        if( domain == null ) this.domain = DEFAULT_DOMAIN;
        if( username == null ) this.username = DEFAULT_USERNAME;
        if( password == null ) this.password = DEFAULT_PASSWORD;
    }
/**
 * Create an <tt>NtlmPasswordAuthentication</tt> object from a
 * domain, username, and password. Parameters that are <tt>null</tt>
 * will be substituted with <tt>jcifs.smb.client.domain</tt>,
 * <tt>jcifs.smb.client.username</tt>, <tt>jcifs.smb.client.password</tt>
 * property values.
 */
    public NtlmPasswordAuthentication( String domain, String username, String password ) {
        this.domain = domain;
        this.username = username;
        this.password = password;

        initDefaults();