86 lines
2.6 KiB
C#
86 lines
2.6 KiB
C#
//
|
|
// System.Security.Cryptography DSASignatureDeformatter.cs
|
|
//
|
|
// Authors:
|
|
// Thomas Neidhart (tome@sbox.tugraz.at)
|
|
// Sebastien Pouliot <sebastien@xamarin.com>
|
|
//
|
|
// Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
|
|
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
|
|
// Copyright 2013 Xamarin Inc. (http://www.xamarin.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.
|
|
//
|
|
|
|
using System.Globalization;
|
|
using System.Runtime.InteropServices;
|
|
|
|
using Mono.Security.Cryptography;
|
|
|
|
namespace System.Security.Cryptography {
|
|
|
|
[ComVisible (true)]
|
|
public class DSASignatureDeformatter : AsymmetricSignatureDeformatter {
|
|
|
|
private DSA dsa;
|
|
|
|
public DSASignatureDeformatter () : base ()
|
|
{
|
|
}
|
|
|
|
public DSASignatureDeformatter (AsymmetricAlgorithm key) : base ()
|
|
{
|
|
SetKey (key);
|
|
}
|
|
|
|
public override void SetHashAlgorithm (string strName)
|
|
{
|
|
if (strName == null)
|
|
throw new ArgumentNullException ("strName");
|
|
|
|
var instance = PKCS1.CreateFromName (strName) as SHA1;
|
|
if (instance == null)
|
|
throw new CryptographicUnexpectedOperationException (
|
|
Locale.GetText ("DSA requires SHA1"));
|
|
}
|
|
|
|
public override void SetKey (AsymmetricAlgorithm key)
|
|
{
|
|
if (key != null) {
|
|
// this will throw a InvalidCastException if this isn't
|
|
// a DSA keypair
|
|
dsa = (DSA) key;
|
|
}
|
|
else
|
|
throw new ArgumentNullException ("key");
|
|
}
|
|
|
|
public override bool VerifySignature (byte[] rgbHash, byte[] rgbSignature)
|
|
{
|
|
if (dsa == null) {
|
|
throw new CryptographicUnexpectedOperationException (
|
|
Locale.GetText ("missing key"));
|
|
}
|
|
|
|
return dsa.VerifySignature (rgbHash, rgbSignature);
|
|
}
|
|
}
|
|
}
|