mcs/class/System.Core/System.Security.Cryptography/CngAlgorithmGroup.cs

   1 //
   2 // System.Security.Cryptography.CngAlgorithmGroup
   3 //
   4 // Authors:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30
  31 namespace System.Security.Cryptography {
  32
  33         // note: CNG stands for "Cryptography API: Next Generation"
  34
  35         [Serializable]
  36         public sealed class CngAlgorithmGroup : IEquatable<CngAlgorithmGroup> {
  37
  38                 private string m_algorithmGroup;
  39
  40                 public CngAlgorithmGroup (string algorithmGroup)
  41                 {
  42                         if (algorithmGroup == null)
  43                                 throw new ArgumentNullException ("algorithmGroup");
  44                         if (algorithmGroup.Length == 0)
  45                                 throw new ArgumentException ("algorithmGroup");
  46
  47                         m_algorithmGroup = algorithmGroup;
  48                 }
  49
  50                 public string AlgorithmGroup {
  51                         get { return m_algorithmGroup; }
  52                 }
  53
  54                 public bool Equals (CngAlgorithmGroup other)
  55                 {
  56                         if (other == null)
  57                                 return false;
  58                         return m_algorithmGroup == other.m_algorithmGroup;
  59                 }
  60
  61                 public override bool Equals (object obj)
  62                 {
  63                         return Equals (obj as CngAlgorithmGroup);
  64                 }
  65
  66                 public override int GetHashCode ()
  67                 {
  68                         return m_algorithmGroup.GetHashCode ();
  69                 }
  70
  71                 public override string ToString ()
  72                 {
  73                         return m_algorithmGroup;
  74                 }
  75
  76                 // static
  77
  78                 private static CngAlgorithmGroup dh;
  79                 private static CngAlgorithmGroup dsa;
  80                 private static CngAlgorithmGroup ecdh;
  81                 private static CngAlgorithmGroup ecdsa;
  82                 private static CngAlgorithmGroup rsa;
  83
  84                 public static CngAlgorithmGroup DiffieHellman {
  85                         get {
  86                                 if (dh == null)
  87                                         dh = new CngAlgorithmGroup ("DH");
  88                                 return dh;
  89                         }
  90                 }
  91
  92                 public static CngAlgorithmGroup Dsa {
  93                         get {
  94                                 if (dsa == null)
  95                                         dsa = new CngAlgorithmGroup ("DSA");
  96                                 return dsa;
  97                         }
  98                 }
  99
 100                 public static CngAlgorithmGroup ECDiffieHellman {
 101                         get {
 102                                 if (ecdh == null)
 103                                         ecdh = new CngAlgorithmGroup ("ECDH");
 104                                 return ecdh;
 105                         }
 106                 }
 107
 108                 public static CngAlgorithmGroup ECDsa {
 109                         get {
 110                                 if (ecdsa == null)
 111                                         ecdsa = new CngAlgorithmGroup ("ECDSA");
 112                                 return ecdsa;
 113                         }
 114                 }
 115
 116                 public static CngAlgorithmGroup Rsa {
 117                         get {
 118                                 if (rsa == null)
 119                                         rsa = new CngAlgorithmGroup ("RSA");
 120                                 return rsa;
 121                         }
 122                 }
 123
 124                 public static bool operator == (CngAlgorithmGroup left, CngAlgorithmGroup right)
 125                 {
 126                         if ((object)left == null)
 127                                 return ((object)right == null);
 128                         return left.Equals (right);
 129                 }
 130
 131                 public static bool operator != (CngAlgorithmGroup left, CngAlgorithmGroup right)
 132                 {
 133                         if ((object)left == null)
 134                                 return ((object)right != null);
 135                         return !left.Equals (right);
 136                 }
 137         }
 138 }