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1   /****************************************************************
2    * Licensed to the Apache Software Foundation (ASF) under one   *
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6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
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17   * under the License.                                           *
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19  
20  
21  package org.apache.james.mailet.crypto.matcher;
22  
23  import java.util.Collection;
24  
25  import javax.mail.MessagingException;
26  import javax.mail.internet.MimeMessage;
27  
28  import org.apache.mailet.base.GenericMatcher;
29  import org.apache.mailet.Mail;
30  
31  /**
32   * Checks if a mail is smime encrypted.
33   * 
34   */
35  public class IsSMIMEEncrypted extends GenericMatcher {
36  
37      /**
38       * @see org.apache.mailet.Matcher#match(org.apache.mailet.Mail)
39       */
40      public Collection match(Mail mail) throws MessagingException {
41          if (mail == null) return null;
42          
43          MimeMessage message = mail.getMessage();
44          if (message == null) return null;
45          
46          if ((message.isMimeType("application/x-pkcs7-mime") 
47                  || message.isMimeType("application/pkcs7-mime")) && (message.getContentType().indexOf("smime-type=enveloped-data") != -1)) {
48              return mail.getRecipients();
49          } else return null;
50      }
51  
52  }