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Java example source code file (NTLMAuthSequence.java)

This example Java source code file (NTLMAuthSequence.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

internal, ioexception, ntlmauthsequence, status, string, util

The NTLMAuthSequence.java Java example source code

/*
 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.net.www.protocol.http.ntlm;

import java.io.IOException;
import java.util.Base64;

/*
 * Hooks into Windows implementation of NTLM.
 * This class will be replaced if a cross-platform version of NTLM
 * is implemented in the future.
 */

public class NTLMAuthSequence {

    private String username;
    private String password;
    private String ntdomain;
    private int state;
    private long crdHandle;
    private long ctxHandle;

    static {
        initFirst(Status.class);
    }

    // Used by native code to indicate when a particular protocol sequence is completed
    // and must not be re-used.

    class Status {
        boolean sequenceComplete;
    }

    Status status;

    NTLMAuthSequence (String username, String password, String ntdomain)
    throws IOException
    {
        this.username = username;
        this.password = password;
        this.ntdomain = ntdomain;
        this.status = new Status();
        state = 0;
        crdHandle = getCredentialsHandle (username, ntdomain, password);
        if (crdHandle == 0) {
            throw new IOException ("could not get credentials handle");
        }
    }

    public String getAuthHeader (String token) throws IOException {
        byte[] input = null;

        assert !status.sequenceComplete;

        if (token != null)
            input = Base64.getDecoder().decode(token);
        byte[] b = getNextToken (crdHandle, input, status);
        if (b == null)
            throw new IOException ("Internal authentication error");
        return Base64.getEncoder().encodeToString(b);
    }

    public boolean isComplete() {
        return status.sequenceComplete;
    }

    private native static void initFirst (Class<NTLMAuthSequence.Status> clazz);

    private native long getCredentialsHandle (String user, String domain, String password);

    private native byte[] getNextToken (long crdHandle, byte[] lastToken, Status returned);
}

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