| /* CramMD5Util.java -- |
| Copyright (C) 2003, 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 |
| USA |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.javax.crypto.sasl.crammd5; |
| |
| import gnu.java.security.Registry; |
| import gnu.java.security.util.Util; |
| import gnu.javax.crypto.mac.HMacFactory; |
| import gnu.javax.crypto.mac.IMac; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.security.InvalidKeyException; |
| import java.util.HashMap; |
| |
| import javax.security.sasl.SaslException; |
| |
| /** |
| * A package-private CRAM-MD5-specific utility class. |
| */ |
| class CramMD5Util |
| { |
| private CramMD5Util() |
| { |
| super(); |
| } |
| |
| static byte[] createMsgID() throws SaslException |
| { |
| final String encoded; |
| try |
| { |
| encoded = Util.toBase64(Thread.currentThread().getName().getBytes("UTF-8")); |
| } |
| catch (UnsupportedEncodingException x) |
| { |
| throw new SaslException("createMsgID()", x); |
| } |
| String hostname = "localhost"; |
| try |
| { |
| hostname = InetAddress.getLocalHost().getHostAddress(); |
| } |
| catch (UnknownHostException ignored) |
| { |
| } |
| final byte[] result; |
| try |
| { |
| result = new StringBuffer("<") |
| .append(encoded.substring(0,encoded.length())) |
| .append(".").append(String.valueOf(System.currentTimeMillis())) |
| .append("@").append(hostname).append(">") |
| .toString() |
| .getBytes("UTF-8"); |
| } |
| catch (UnsupportedEncodingException x) |
| { |
| throw new SaslException("createMsgID()", x); |
| } |
| return result; |
| } |
| |
| static byte[] createHMac(final char[] passwd, final byte[] data) |
| throws InvalidKeyException, SaslException |
| { |
| final IMac mac = HMacFactory.getInstance(Registry.HMAC_NAME_PREFIX |
| + Registry.MD5_HASH); |
| final HashMap map = new HashMap(); |
| final byte[] km; |
| try |
| { |
| km = new String(passwd).getBytes("UTF-8"); |
| } |
| catch (UnsupportedEncodingException x) |
| { |
| throw new SaslException("createHMac()", x); |
| } |
| map.put(IMac.MAC_KEY_MATERIAL, km); |
| mac.init(map); |
| mac.update(data, 0, data.length); |
| return mac.digest(); |
| } |
| } |