2 // System.Security.Cryptography DSASignatureFormatter.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)
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17 // permit persons to whom the Software is furnished to do so, subject to
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20 // The above copyright notice and this permission notice shall be
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32 using System.Globalization;
33 using System.Runtime.InteropServices;
35 using Mono.Security.Cryptography;
37 namespace System.Security.Cryptography {
40 public class DSASignatureFormatter : AsymmetricSignatureFormatter {
44 public DSASignatureFormatter () : base ()
48 public DSASignatureFormatter (AsymmetricAlgorithm key) : base ()
53 public override byte[] CreateSignature (byte[] rgbHash)
56 throw new CryptographicUnexpectedOperationException (
57 Locale.GetText ("missing key"));
60 return dsa.CreateSignature (rgbHash);
63 public override void SetHashAlgorithm (string strName)
66 throw new ArgumentNullException ("strName");
68 var instance = PKCS1.CreateFromName (strName) as SHA1;
70 throw new CryptographicUnexpectedOperationException (
71 Locale.GetText ("DSA requires SHA1"));
74 public override void SetKey (AsymmetricAlgorithm key)
77 // this will throw a InvalidCastException if this isn't
82 throw new ArgumentNullException ("key");