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Viewing changes to gnu/javax/crypto/sasl/crammd5/CramMD5Util.java

  • Committer: Bazaar Package Importer
  • Author(s): Michael Koch
  • Date: 2006-05-27 16:11:15 UTC
  • mfrom: (1.1.3 upstream)
  • Revision ID: james.westby@ubuntu.com-20060527161115-h6e39eposdt5snb6
Tags: 2:0.91-3
http://bugs.debian.org/368172
* Install header files to /usr/include/classpath.
* debian/control: classpath: Conflict with jamvm < 1.4.3 and
  cacao < 0.96 (Closes: #368172).

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gnu/javax/crypto/sasl/crammd5/CramMD5Util.java
 
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/* CramMD5Util.java -- 
 
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   Copyright (C) 2003, 2006 Free Software Foundation, Inc.
 
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This file is a part of GNU Classpath.
 
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GNU Classpath is free software; you can redistribute it and/or modify
 
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it under the terms of the GNU General Public License as published by
 
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the Free Software Foundation; either version 2 of the License, or (at
 
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your option) any later version.
 
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GNU Classpath is distributed in the hope that it will be useful, but
 
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WITHOUT ANY WARRANTY; without even the implied warranty of
 
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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General Public License for more details.
 
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You should have received a copy of the GNU General Public License
 
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along with GNU Classpath; if not, write to the Free Software
 
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 
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USA
 
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Linking this library statically or dynamically with other modules is
 
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making a combined work based on this library.  Thus, the terms and
 
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conditions of the GNU General Public License cover the whole
 
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combination.
 
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As a special exception, the copyright holders of this library give you
 
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permission to link this library with independent modules to produce an
 
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executable, regardless of the license terms of these independent
 
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modules, and to copy and distribute the resulting executable under
 
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terms of your choice, provided that you also meet, for each linked
 
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independent module, the terms and conditions of the license of that
 
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module.  An independent module is a module which is not derived from
 
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or based on this library.  If you modify this library, you may extend
 
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this exception to your version of the library, but you are not
 
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obligated to do so.  If you do not wish to do so, delete this
 
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exception statement from your version.  */
 
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package gnu.javax.crypto.sasl.crammd5;
 
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import gnu.java.security.Registry;
 
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import gnu.java.security.util.Util;
 
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import gnu.javax.crypto.mac.HMacFactory;
 
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import gnu.javax.crypto.mac.IMac;
 
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import java.io.UnsupportedEncodingException;
 
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import java.net.InetAddress;
 
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import java.net.UnknownHostException;
 
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import java.security.InvalidKeyException;
 
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import java.util.HashMap;
 
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import javax.security.sasl.SaslException;
 
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/**
 
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 * A package-private CRAM-MD5-specific utility class.
 
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 */
 
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class CramMD5Util
 
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{
 
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  // Constants and variables
 
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  // -------------------------------------------------------------------------
 
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  // Constructor(s)
 
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  // -------------------------------------------------------------------------
 
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  private CramMD5Util()
 
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  {
 
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    super();
 
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  }
 
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  // Class methods
 
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  // -------------------------------------------------------------------------
 
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  static byte[] createMsgID() throws SaslException
 
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  {
 
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    // <process-ID.clock@hostname>
 
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    final String encoded;
 
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    try
 
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      {
 
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        encoded = Util.toBase64(Thread.currentThread().getName().getBytes(
 
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                                                                          "UTF-8"));
 
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      }
 
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    catch (UnsupportedEncodingException x)
 
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      {
 
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        throw new SaslException("createMsgID()", x);
 
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      }
 
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    String hostname = "localhost";
 
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    try
 
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      {
 
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        hostname = InetAddress.getLocalHost().getHostAddress();
 
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      }
 
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    catch (UnknownHostException ignored)
 
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      {
 
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      }
 
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    final byte[] result;
 
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    try
 
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      {
 
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        result = new StringBuffer().append("<").append(
 
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                                                       encoded.substring(
 
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                                                                         0,
 
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                                                                         encoded.length())).append(
 
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                                                                                                   ".").append(
 
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                                                                                                               String.valueOf(System.currentTimeMillis())).append(
 
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                                                                                                                                                                  "@").append(
 
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                                                                                                                                                                              hostname).append(
 
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                                                                                                                                                                                               ">").toString().getBytes(
 
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                                                                                                                                                                                                                        "UTF-8");
 
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      }
 
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    catch (UnsupportedEncodingException x)
 
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      {
 
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        throw new SaslException("createMsgID()", x);
 
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      }
 
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    return result;
 
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  }
 
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  static byte[] createHMac(final char[] passwd, final byte[] data)
 
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      throws InvalidKeyException, SaslException
 
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  {
 
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    final IMac mac = HMacFactory.getInstance(Registry.HMAC_NAME_PREFIX
 
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                                             + Registry.MD5_HASH);
 
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    final HashMap map = new HashMap();
 
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    final byte[] km;
 
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    try
 
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      {
 
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        km = new String(passwd).getBytes("UTF-8");
 
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      }
 
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    catch (UnsupportedEncodingException x)
 
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      {
 
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        throw new SaslException("createHMac()", x);
 
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      }
 
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    map.put(IMac.MAC_KEY_MATERIAL, km);
 
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    mac.init(map);
 
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    mac.update(data, 0, data.length);
 
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    return mac.digest();
 
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  }
 
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}
 
 
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