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1   /************************************************************************
2    * Copyright (c) 2000-2006 The Apache Software Foundation.             *
3    * All rights reserved.                                                *
4    * ------------------------------------------------------------------- *
5    * Licensed under the Apache License, Version 2.0 (the "License"); you *
6    * may not use this file except in compliance with the License. You    *
7    * may obtain a copy of the License at:                                *
8    *                                                                     *
9    *     http://www.apache.org/licenses/LICENSE-2.0                      *
10   *                                                                     *
11   * Unless required by applicable law or agreed to in writing, software *
12   * distributed under the License is distributed on an "AS IS" BASIS,   *
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or     *
14   * implied.  See the License for the specific language governing       *
15   * permissions and limitations under the License.                      *
16   ***********************************************************************/
17  package org.apache.james.transport.matchers.smime;
18  
19  import java.util.Collection;
20  
21  import javax.mail.MessagingException;
22  import javax.mail.internet.MimeMessage;
23  
24  import org.apache.mailet.GenericMatcher;
25  import org.apache.mailet.Mail;
26  
27  /***
28   * Checks if a mail is smime encrypted.
29   * 
30   */
31  public class IsSMIMEEncrypted extends GenericMatcher {
32  
33      /***
34       * @see org.apache.mailet.Matcher#match(org.apache.mailet.Mail)
35       */
36      public Collection match(Mail mail) throws MessagingException {
37          if (mail == null) return null;
38          
39          MimeMessage message = mail.getMessage();
40          if (message == null) return null;
41          
42          if ((message.isMimeType("application/x-pkcs7-mime") 
43                  || message.isMimeType("application/pkcs7-mime")) && (message.getContentType().indexOf("smime-type=enveloped-data") != -1)) {
44              return mail.getRecipients();
45          } else return null;
46      }
47  
48  }