110 lines
3.0 KiB
C#
110 lines
3.0 KiB
C#
//
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// System.Security.Cryptography.Pkcs.Pkcs9MessageDigest class
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//
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// Authors:
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// Tim Coleman (tim@timcoleman.com)
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// Copyright (C) Tim Coleman, 2004
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// Copyright (C) 2004-2005 Novell Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if SECURITY_DEP
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using Mono.Security;
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namespace System.Security.Cryptography.Pkcs {
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public sealed class Pkcs9MessageDigest : Pkcs9AttributeObject {
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internal const string oid = "1.2.840.113549.1.9.4";
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internal const string friendlyName = "Message Digest";
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private byte[] _messageDigest;
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private byte[] _encoded;
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// constructors
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public Pkcs9MessageDigest ()
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{
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// Pkcs9Attribute remove the "set" accessor on Oid :-(
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(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
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_encoded = null;
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}
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internal Pkcs9MessageDigest (byte[] messageDigest, bool encoded)
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{
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if (messageDigest == null)
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throw new ArgumentNullException ("messageDigest");
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if (encoded) {
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(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
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RawData = messageDigest;
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Decode (messageDigest);
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} else {
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(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
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_messageDigest = (byte[]) _messageDigest.Clone ();
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RawData = Encode ();
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}
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}
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// properties
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public byte[] MessageDigest {
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get {
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if (_encoded != null)
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Decode (_encoded);
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// FIXME: beta2 returns a reference
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return _messageDigest;
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}
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}
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// methods
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public override void CopyFrom (AsnEncodedData asnEncodedData)
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{
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base.CopyFrom (asnEncodedData);
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_encoded = asnEncodedData.RawData;
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}
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// internal stuff
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internal void Decode (byte[] attribute)
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{
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if ((attribute == null) || (attribute [0] != 0x04))
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throw new CryptographicException (Locale.GetText ("Expected an OCTETSTRING."));
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ASN1 md = new ASN1 (attribute);
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_messageDigest = md.Value;
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_encoded = null;
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}
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internal byte[] Encode ()
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{
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ASN1 md = new ASN1 (0x04, _messageDigest);
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return md.GetBytes ();
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}
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}
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}
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#endif
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