mcs/class/referencesource/System.Core/System/Security/Cryptography/ECDsa.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6
   7 using System;
   8
   9 namespace System.Security.Cryptography {
  10     /// <summary>
  11     ///     Base class for implementations of elliptic curve DSA
  12     /// </summary>
  13     [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
  14     public abstract class ECDsa : AsymmetricAlgorithm {
  15         public override string KeyExchangeAlgorithm {
  16             get { return null; }
  17         }
  18
  19         public override string SignatureAlgorithm {
  20             get { return "ECDsa"; }
  21         }
  22
  23         //
  24         // Creation factory methods
  25         //
  26
  27         public static new ECDsa Create() {
  28 #if MONO
  29             throw new NotImplementedException ();
  30 #else
  31             return Create(typeof(ECDsaCng).FullName);
  32 #endif
  33         }
  34
  35         public static new ECDsa Create(string algorithm) {
  36             if (algorithm == null) {
  37                 throw new ArgumentNullException("algorithm");
  38             }
  39
  40             return CryptoConfig.CreateFromName(algorithm) as ECDsa;
  41         }
  42
  43         //
  44         // Signature operations
  45         //
  46
  47         public abstract byte[] SignHash(byte[] hash);
  48         public abstract bool VerifyHash(byte[] hash, byte[] signature);
  49     }
  50 }