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//
// System.Security.Cryptography.Pkcs.Pkcs9MessageDigest class
//
// Authors:
// Tim Coleman (tim@timcoleman.com)
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) Tim Coleman, 2004
// Copyright (C) 2004-2005 Novell Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0
using Mono.Security;
namespace System.Security.Cryptography.Pkcs {
public sealed class Pkcs9MessageDigest : Pkcs9AttributeObject {
internal const string oid = "1.2.840.113549.1.9.4";
internal const string friendlyName = "Message Digest";
private byte[] _messageDigest;
private byte[] _encoded;
// constructors
public Pkcs9MessageDigest ()
{
// Pkcs9Attribute remove the "set" accessor on Oid :-(
(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
_encoded = null;
}
internal Pkcs9MessageDigest (byte[] messageDigest, bool encoded)
{
if (messageDigest == null)
throw new ArgumentNullException ("messageDigest");
if (encoded) {
(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
RawData = messageDigest;
Decode (messageDigest);
} else {
(this as AsnEncodedData).Oid = new Oid (oid, friendlyName);
_messageDigest = (byte[]) _messageDigest.Clone ();
RawData = Encode ();
}
}
// properties
public byte[] MessageDigest {
get {
if (_encoded != null)
Decode (_encoded);
// FIXME: beta2 returns a reference
return _messageDigest;
}
}
// methods
public override void CopyFrom (AsnEncodedData asnEncodedData)
{
base.CopyFrom (asnEncodedData);
_encoded = asnEncodedData.RawData;
}
// internal stuff
internal void Decode (byte[] attribute)
{
if ((attribute == null) || (attribute [0] != 0x04))
throw new CryptographicException (Locale.GetText ("Expected an OCTETSTRING."));
ASN1 md = new ASN1 (attribute);
_messageDigest = md.Value;
_encoded = null;
}
internal byte[] Encode ()
{
ASN1 md = new ASN1 (0x04, _messageDigest);
return md.GetBytes ();
}
}
}
#endif
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