org.jasig.portlet.calendar.adapter.exchange.JCIFSEngine.java Source code

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Here is the source code for org.jasig.portlet.calendar.adapter.exchange.JCIFSEngine.java

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/**
 * Licensed to Apereo under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Apereo licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file
 * except in compliance with the License.  You may obtain a
 * copy of the License at the following location:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.jasig.portlet.calendar.adapter.exchange;

import java.io.IOException;

import jcifs.ntlmssp.NtlmFlags;
import jcifs.ntlmssp.Type1Message;
import jcifs.ntlmssp.Type2Message;
import jcifs.ntlmssp.Type3Message;
import jcifs.util.Base64;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.impl.auth.NTLMEngine;
import org.apache.http.impl.auth.NTLMEngineException;

public final class JCIFSEngine implements NTLMEngine {

    private static final int TYPE_1_FLAGS = NtlmFlags.NTLMSSP_NEGOTIATE_56 | NtlmFlags.NTLMSSP_NEGOTIATE_128
            | NtlmFlags.NTLMSSP_NEGOTIATE_NTLM2 | NtlmFlags.NTLMSSP_NEGOTIATE_ALWAYS_SIGN
            | NtlmFlags.NTLMSSP_REQUEST_TARGET;

    private final Log log = LogFactory.getLog(this.getClass());

    public String generateType1Msg(final String domain, final String workstation) throws NTLMEngineException {

        if (log.isDebugEnabled()) {
            log.debug("Generating NTLM Type 1 message;  domain=" + domain + ", workstation=" + workstation);
        }

        final Type1Message type1Message = new Type1Message(TYPE_1_FLAGS, domain, workstation);
        return Base64.encode(type1Message.toByteArray());
    }

    public String generateType3Msg(final String username, final String password, final String domain,
            final String workstation, final String challenge) throws NTLMEngineException {

        if (log.isDebugEnabled()) {
            log.debug("Generating NTLM Type 3 message;  username=" + username + ", password.length="
                    + password.length() + ", domain=" + domain + ", workstation=" + workstation + ", challenge="
                    + challenge);
        }

        Type2Message type2Message;
        try {
            type2Message = new Type2Message(Base64.decode(challenge));
        } catch (final IOException exception) {
            throw new NTLMEngineException("Invalid NTLM type 2 message", exception);
        }
        final int type2Flags = type2Message.getFlags();
        final int type3Flags = type2Flags
                & (0xffffffff ^ (NtlmFlags.NTLMSSP_TARGET_TYPE_DOMAIN | NtlmFlags.NTLMSSP_TARGET_TYPE_SERVER));
        final Type3Message type3Message = new Type3Message(type2Message, password, domain, username, workstation,
                type3Flags);
        return Base64.encode(type3Message.toByteArray());
    }

}