2 // System.Security.Cryptography.Pkcs.Pkcs9DocumentDescription class
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
8 // Copyright (C) 2004-2005 Novell Inc. (http://www.novell.com)
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:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
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.
36 namespace System.Security.Cryptography.Pkcs {
38 public sealed class Pkcs9DocumentDescription : Pkcs9AttributeObject {
40 internal const string oid = "1.3.6.1.4.1.311.88.2.2";
41 internal const string friendlyName = null;
45 public Pkcs9DocumentDescription ()
47 // Pkcs9Attribute remove the "set" accessor on Oid :-(
48 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
51 public Pkcs9DocumentDescription (string documentDescription)
53 if (documentDescription == null)
54 throw new ArgumentNullException ("documentName");
56 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
57 _desc = documentDescription;
61 public Pkcs9DocumentDescription (byte[] encodedDocumentDescription)
63 if (encodedDocumentDescription == null)
64 throw new ArgumentNullException ("encodedDocumentDescription");
66 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
67 RawData = encodedDocumentDescription;
68 Decode (encodedDocumentDescription);
71 public string DocumentDescription {
75 public override void CopyFrom (AsnEncodedData asnEncodedData)
77 base.CopyFrom (asnEncodedData);
78 Decode (this.RawData);
83 internal void Decode (byte[] attribute)
85 if (attribute [0] != 0x04)
88 ASN1 attr = new ASN1 (attribute);
89 byte[] str = attr.Value;
90 int length = str.Length;
91 if (str [length - 2] == 0x00)
92 length -= 2; // zero-terminated (normal)
93 _desc = Encoding.Unicode.GetString (str, 0, length);
96 internal byte[] Encode ()
98 // OCTETSTRING (0x04) Of the zero-terminated unicode string
99 ASN1 attr = new ASN1 (0x04, Encoding.Unicode.GetBytes (_desc + (char)0));
100 return attr.GetBytes ();