| /* CramMD5Client.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.sasl.ClientMechanism; |
| |
| import java.io.IOException; |
| import java.security.InvalidKeyException; |
| |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.NameCallback; |
| import javax.security.auth.callback.PasswordCallback; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import javax.security.sasl.AuthenticationException; |
| import javax.security.sasl.SaslClient; |
| import javax.security.sasl.SaslException; |
| |
| /** |
| * The CRAM-MD5 SASL client-side mechanism. |
| */ |
| public class CramMD5Client |
| extends ClientMechanism |
| implements SaslClient |
| { |
| public CramMD5Client() |
| { |
| super(Registry.SASL_CRAM_MD5_MECHANISM); |
| } |
| |
| protected void initMechanism() throws SaslException |
| { |
| } |
| |
| protected void resetMechanism() throws SaslException |
| { |
| } |
| |
| public boolean hasInitialResponse() |
| { |
| return false; |
| } |
| |
| public byte[] evaluateChallenge(final byte[] challenge) throws SaslException |
| { |
| if (challenge == null) |
| throw new SaslException("null challenge"); |
| try |
| { |
| final String username; |
| final char[] password; |
| Callback[] callbacks; |
| if ((! properties.containsKey(Registry.SASL_USERNAME)) |
| && (! properties.containsKey(Registry.SASL_PASSWORD))) |
| { |
| callbacks = new Callback[2]; |
| final NameCallback nameCB; |
| final String defaultName = System.getProperty("user.name"); |
| if (defaultName == null) |
| nameCB = new NameCallback("username: "); |
| else |
| nameCB = new NameCallback("username: ", defaultName); |
| final PasswordCallback pwdCB = new PasswordCallback("password: ", |
| false); |
| callbacks[0] = nameCB; |
| callbacks[1] = pwdCB; |
| this.handler.handle(callbacks); |
| username = nameCB.getName(); |
| password = pwdCB.getPassword(); |
| } |
| else |
| { |
| if (properties.containsKey(Registry.SASL_USERNAME)) |
| username = (String) properties.get(Registry.SASL_USERNAME); |
| else |
| { |
| callbacks = new Callback[1]; |
| final NameCallback nameCB; |
| final String defaultName = System.getProperty("user.name"); |
| if (defaultName == null) |
| nameCB = new NameCallback("username: "); |
| else |
| nameCB = new NameCallback("username: ", defaultName); |
| callbacks[0] = nameCB; |
| this.handler.handle(callbacks); |
| username = nameCB.getName(); |
| } |
| |
| if (properties.containsKey(Registry.SASL_PASSWORD)) |
| password = ((String) properties.get(Registry.SASL_PASSWORD)).toCharArray(); |
| else |
| { |
| callbacks = new Callback[1]; |
| final PasswordCallback pwdCB = new PasswordCallback("password: ", |
| false); |
| callbacks[0] = pwdCB; |
| this.handler.handle(callbacks); |
| password = pwdCB.getPassword(); |
| } |
| } |
| if (password == null) |
| throw new SaslException("null password supplied"); |
| final byte[] digest; |
| try |
| { |
| digest = CramMD5Util.createHMac(password, challenge); |
| } |
| catch (InvalidKeyException x) |
| { |
| throw new AuthenticationException("evaluateChallenge()", x); |
| } |
| final String response = username + " " |
| + Util.toString(digest).toLowerCase(); |
| this.complete = true; |
| return response.getBytes("UTF-8"); |
| } |
| catch (UnsupportedCallbackException x) |
| { |
| throw new AuthenticationException("evaluateChallenge()", x); |
| } |
| catch (IOException x) |
| { |
| throw new AuthenticationException("evaluateChallenge()", x); |
| } |
| } |
| |
| protected String getNegotiatedQOP() |
| { |
| return Registry.QOP_AUTH; |
| } |
| } |