2 // System.Security.Cryptography DSASignatureDeformatter.cs
5 // Thomas Neidhart (tome@sbox.tugraz.at)
6 // Sebastien Pouliot <sebastien@xamarin.com>
8 // Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
9 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
10 // Copyright 2013 Xamarin Inc. (http://www.xamarin.com)
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 using System.Globalization;
33 using System.Runtime.InteropServices;
35 using Mono.Security.Cryptography;
37 namespace System.Security.Cryptography {
40 public class DSASignatureDeformatter : AsymmetricSignatureDeformatter {
44 public DSASignatureDeformatter () : base ()
48 public DSASignatureDeformatter (AsymmetricAlgorithm key) : base ()
53 public override void SetHashAlgorithm (string strName)
56 throw new ArgumentNullException ("strName");
58 var instance = PKCS1.CreateFromName (strName) as SHA1;
60 throw new CryptographicUnexpectedOperationException (
61 Locale.GetText ("DSA requires SHA1"));
64 public override void SetKey (AsymmetricAlgorithm key)
67 // this will throw a InvalidCastException if this isn't
72 throw new ArgumentNullException ("key");
75 public override bool VerifySignature (byte[] rgbHash, byte[] rgbSignature)
78 throw new CryptographicUnexpectedOperationException (
79 Locale.GetText ("missing key"));
82 return dsa.VerifySignature (rgbHash, rgbSignature);