2 // System.Security.Cryptography.Pkcs.Pkcs9MessageDigest class
5 // Tim Coleman (tim@timcoleman.com)
6 // Sebastien Pouliot <sebastien@ximian.com>
8 // Copyright (C) Tim Coleman, 2004
9 // Copyright (C) 2004-2005 Novell Inc. (http://www.novell.com)
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35 namespace System.Security.Cryptography.Pkcs {
37 public sealed class Pkcs9MessageDigest : Pkcs9AttributeObject {
39 internal const string oid = "1.2.840.113549.1.9.4";
40 internal const string friendlyName = "Message Digest";
42 private byte[] _messageDigest;
43 private byte[] _encoded;
47 public Pkcs9MessageDigest ()
49 // Pkcs9Attribute remove the "set" accessor on Oid :-(
50 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
54 internal Pkcs9MessageDigest (byte[] messageDigest, bool encoded)
56 if (messageDigest == null)
57 throw new ArgumentNullException ("messageDigest");
60 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
61 RawData = messageDigest;
62 Decode (messageDigest);
64 (this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
65 _messageDigest = (byte[]) _messageDigest.Clone ();
72 public byte[] MessageDigest {
76 // FIXME: beta2 returns a reference
77 return _messageDigest;
83 public override void CopyFrom (AsnEncodedData asnEncodedData)
85 base.CopyFrom (asnEncodedData);
86 _encoded = asnEncodedData.RawData;
91 internal void Decode (byte[] attribute)
93 if ((attribute == null) || (attribute [0] != 0x04))
94 throw new CryptographicException (Locale.GetText ("Expected an OCTETSTRING."));
96 ASN1 md = new ASN1 (attribute);
97 _messageDigest = md.Value;
101 internal byte[] Encode ()
103 ASN1 md = new ASN1 (0x04, _messageDigest);
104 return md.GetBytes ();