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    1   /* Copyright 2004 Acegi Technology Pty Limited
    2    *
    3    * Licensed under the Apache License, Version 2.0 (the "License");
    4    * you may not use this file except in compliance with the License.
    5    * You may obtain a copy of the License at
    6    *
    7    *     http://www.apache.org/licenses/LICENSE-2.0
    8    *
    9    * Unless required by applicable law or agreed to in writing, software
    10   * distributed under the License is distributed on an "AS IS" BASIS,
    11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12   * See the License for the specific language governing permissions and
    13   * limitations under the License.
    14   */
    15
    16  package org.acegisecurity.providers.jaas;
    17
    18  import org.acegisecurity.Authentication;
    19
    20  import java.io.IOException;
    21
    22  import javax.security.auth.callback.Callback;
    23  import javax.security.auth.callback.PasswordCallback;
    24  import javax.security.auth.callback.UnsupportedCallbackException;
    25
    26
    27  /***
    28   * The most basic Callbacks to be handled when using a LoginContext from JAAS,
    29   * are the NameCallback and PasswordCallback. The acegi security framework
    30   * provides the JaasPasswordCallbackHandler specifically tailored to handling
    31   * the PasswordCallback. <br>
    32   *
    33   * @author Ray Krueger
    34   * @version $Id: JaasPasswordCallbackHandler.java,v 1.4 2005/11/17 00:55:52 benalex Exp $
    35   *
    36   * @see <a
    37   *      href="http://java.sun.com/j2se/1.4.2/docs/api/javax/security/auth/callback/Callback.html">Callback</a>
    38   * @see <a
    39   *      href="http://java.sun.com/j2se/1.4.2/docs/api/javax/security/auth/callback/PasswordCallback.html">PasswordCallback</a>
    40   */
    41  public class JaasPasswordCallbackHandler
    42      implements JaasAuthenticationCallbackHandler {
    43      //~ Methods ================================================================
    44
    45      /***
    46       * If the callback passed to the 'handle' method is an instance of
    47       * PasswordCallback, the JaasPasswordCallbackHandler will call,
    48       * callback.setPassword(authentication.getCredentials().toString()).
    49       *
    50       * @param callback
    51       * @param auth
    52       *
    53       * @throws IOException
    54       * @throws UnsupportedCallbackException
    55       */
    56      public void handle(Callback callback, Authentication auth)
    57          throws IOException, UnsupportedCallbackException {
    58          if (callback instanceof PasswordCallback) {
    59              PasswordCallback pc = (PasswordCallback) callback;
    60              pc.setPassword(auth.getCredentials().toString().toCharArray());
    61          }
    62      }
    63  }