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1   /* Copyright 2004, 2005, 2006 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 org.acegisecurity.AcegiMessageSource;
19  
20  import org.acegisecurity.providers.cas.CasProxyDecider;
21  import org.acegisecurity.providers.cas.ProxyUntrustedException;
22  
23  import org.apache.commons.logging.Log;
24  import org.apache.commons.logging.LogFactory;
25  
26  import org.springframework.beans.factory.InitializingBean;
27  
28  import org.springframework.context.MessageSource;
29  import org.springframework.context.MessageSourceAware;
30  import org.springframework.context.support.MessageSourceAccessor;
31  
32  import org.springframework.util.Assert;
33  
34  import java.util.List;
35  
36  
37  /**
38   * Accepts proxied requests if the closest proxy is named in the <code>validProxies</code> list.<P>Also accepts the
39   * request if there was no proxy (ie the user directly authenticated against this service).</p>
40   */
41  public class NamedCasProxyDecider implements CasProxyDecider, InitializingBean, MessageSourceAware {
42      //~ Static fields/initializers =====================================================================================
43  
44      private static final Log logger = LogFactory.getLog(NamedCasProxyDecider.class);
45  
46      //~ Instance fields ================================================================================================
47  
48      private List validProxies;
49      protected MessageSourceAccessor messages = AcegiMessageSource.getAccessor();
50  
51      //~ Methods ========================================================================================================
52  
53      public void afterPropertiesSet() throws Exception {
54          Assert.notNull(this.validProxies, "A validProxies list must be set");
55          Assert.notNull(this.messages, "A message source must be set");
56      }
57  
58      public void confirmProxyListTrusted(List proxyList)
59          throws ProxyUntrustedException {
60          Assert.notNull(proxyList, "proxyList cannot be null");
61  
62          if (logger.isDebugEnabled()) {
63              logger.debug("Proxy list: " + proxyList.toString());
64          }
65  
66          if (proxyList.size() == 0) {
67              // A Service Ticket (not a Proxy Ticket)
68              return;
69          }
70  
71          if (!validProxies.contains(proxyList.get(0))) {
72              throw new ProxyUntrustedException(messages.getMessage("NamedCasProxyDecider.untrusted",
73                      new Object[] {proxyList.get(0)}, "Nearest proxy {0} is untrusted"));
74          }
75      }
76  
77      public List getValidProxies() {
78          return validProxies;
79      }
80  
81      public void setMessageSource(MessageSource messageSource) {
82          this.messages = new MessageSourceAccessor(messageSource);
83      }
84  
85      public void setValidProxies(List validProxies) {
86          this.validProxies = validProxies;
87      }
88  }