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    1   /* Copyright 2004, 2005 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.cas.proxy;
    17
    18  import java.util.List;
    19
    20  import org.acegisecurity.AcegiMessageSource;
    21  import org.acegisecurity.providers.cas.CasProxyDecider;
    22  import org.acegisecurity.providers.cas.ProxyUntrustedException;
    23  import org.apache.commons.logging.Log;
    24  import org.apache.commons.logging.LogFactory;
    25  import org.springframework.beans.factory.InitializingBean;
    26  import org.springframework.context.MessageSource;
    27  import org.springframework.context.MessageSourceAware;
    28  import org.springframework.context.support.MessageSourceAccessor;
    29  import org.springframework.util.Assert;
    30
    31
    32  /***
    33   * Accepts proxied requests if the closest proxy is named in the
    34   * <code>validProxies</code> list.
    35   *
    36   * <P>
    37   * Also accepts the request if there was no proxy (ie the user directly
    38   * authenticated against this service).
    39   * </p>
    40   */
    41  public class NamedCasProxyDecider implements CasProxyDecider, InitializingBean,
    42      MessageSourceAware {
    43      //~ Static fields/initializers =============================================
    44
    45      private static final Log logger = LogFactory.getLog(NamedCasProxyDecider.class);
    46
    47      //~ Instance fields ========================================================
    48
    49      private List validProxies;
    50      protected MessageSourceAccessor messages = AcegiMessageSource.getAccessor();
    51
    52      //~ Methods ================================================================
    53
    54      public void afterPropertiesSet() throws Exception {
    55          Assert.notNull(this.validProxies, "A validProxies list must be set");
    56          Assert.notNull(this.messages, "A message source must be set");
    57      }
    58
    59      public void confirmProxyListTrusted(List proxyList)
    60          throws ProxyUntrustedException {
    61          Assert.notNull(proxyList, "proxyList cannot be null");
    62
    63          if (logger.isDebugEnabled()) {
    64              logger.debug("Proxy list: " + proxyList.toString());
    65          }
    66
    67          if (proxyList.size() == 0) {
    68              // A Service Ticket (not a Proxy Ticket)
    69              return;
    70          }
    71
    72          if (!validProxies.contains(proxyList.get(0))) {
    73              throw new ProxyUntrustedException(messages.getMessage(
    74                      "NamedCasProxyDecider.untrusted",
    75                      new Object[] {proxyList.get(0)},
    76                      "Nearest proxy {0} is untrusted"));
    77          }
    78      }
    79
    80      public List getValidProxies() {
    81          return validProxies;
    82      }
    83
    84      public void setMessageSource(MessageSource messageSource) {
    85          this.messages = new MessageSourceAccessor(messageSource);
    86      }
    87
    88      public void setValidProxies(List validProxies) {
    89          this.validProxies = validProxies;
    90      }
    91  }