mcs/class/System.Security/System.Security.Cryptography.Pkcs/ContentInfo.cs

   1 //
   2 // System.Security.Cryptography.Pkcs.ContentInfo
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 #if NET_2_0
  31
  32 using System;
  33 using System.Security.Cryptography;
  34
  35 using Mono.Security;
  36
  37 namespace System.Security.Cryptography.Pkcs {
  38
  39         /*
  40         * ContentInfo ::= SEQUENCE {
  41         *       contentType ContentType,
  42         *       content [0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
  43         * }
  44         * ContentType ::= OBJECT IDENTIFIER
  45         */
  46
  47         public sealed class ContentInfo {
  48
  49                 private Oid _oid;
  50                 private byte[] _content;
  51
  52                 // constructors
  53
  54                 public ContentInfo (byte[] content)
  55                         : this (new Oid ("1.2.840.113549.1.7.1"), content)
  56                 {
  57                 }
  58
  59                 public ContentInfo (Oid oid, byte[] content)
  60                 {
  61                         if (oid == null)
  62                                 throw new ArgumentNullException ("oid");
  63                         if (content == null)
  64                                 throw new ArgumentNullException ("content");
  65
  66                         _oid = oid;
  67                         _content = content;
  68                 }
  69
  70                 ~ContentInfo ()
  71                 {
  72                 }
  73
  74                 // properties
  75
  76                 public byte[] Content {
  77                         get { return _content; }
  78                 }
  79
  80                 public Oid ContentType {
  81                         get { return _oid; }
  82                 }
  83
  84                 // static methods
  85
  86                 [MonoTODO("Incomplete OID support")]
  87                 public static Oid GetContentType (byte[] encodedMessage)
  88                 {
  89 // FIXME: compatibility with fx 1.2.3400.0
  90                         if (encodedMessage == null)
  91                                 throw new NullReferenceException ();
  92 //                              throw new ArgumentNullException ("algorithm");
  93                         try {
  94                                 PKCS7.ContentInfo ci = new PKCS7.ContentInfo (encodedMessage);
  95                                 switch (ci.ContentType) {
  96                                         // TODO - there are probably more - need testing
  97                                         case PKCS7.Oid.signedData:
  98                                                 return new Oid (ci.ContentType);
  99                                         default:
 100                                                 throw new CryptographicException ("Bad ASN1 - invalid OID");
 101                                 }
 102                         }
 103                         catch (Exception e) {
 104                                 throw new CryptographicException ("Bad ASN1 - invalid structure", e);
 105                         }
 106                 }
 107         }
 108 }
 109
 110 #endif