mcs/class/corlib/System.Security.Cryptography/CryptoAPITransform.cs

   1 //
   2 // System.Security.Cryptography CryptoAPITransform.cs
   3 //
   4 // Authors:
   5 //      Thomas Neidhart (tome@sbox.tugraz.at)
   6 //      Sebastien Pouliot (sebastien@ximian.com)
   7 //
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31
  32 namespace System.Security.Cryptography {
  33
  34         // Note: This class isn't used by Mono as all algorithms are provided with
  35         // 100% managed implementations.
  36
  37         public sealed class CryptoAPITransform : ICryptoTransform {
  38
  39                 private bool m_disposed;
  40
  41                 internal CryptoAPITransform ()
  42                 {
  43                         m_disposed = false;
  44                 }
  45
  46 #if ! NET_2_0
  47                 ~CryptoAPITransform ()
  48                 {
  49                         Dispose (false);
  50                 }
  51 #endif
  52
  53                 public bool CanReuseTransform {
  54                         get { return true; }
  55                 }
  56
  57                 public bool CanTransformMultipleBlocks {
  58                         get { return true; }
  59                 }
  60
  61                 public int InputBlockSize {
  62                         get { return 0; }
  63                 }
  64
  65                 public IntPtr KeyHandle {
  66                         get { return IntPtr.Zero; }
  67                 }
  68
  69                 public int OutputBlockSize {
  70                         get { return 0; }
  71                 }
  72
  73                 void IDisposable.Dispose ()
  74                 {
  75                         Dispose (true);
  76                         GC.SuppressFinalize (this);  // Finalization is now unnecessary
  77                 }
  78
  79                 public void Clear ()
  80                 {
  81                         Dispose (false);
  82                 }
  83
  84                 private void Dispose (bool disposing)
  85                 {
  86                         if (!m_disposed) {
  87                                 // dispose unmanaged objects
  88                                 if (disposing) {
  89                                         // dispose managed objects
  90                                 }
  91                                 m_disposed = true;
  92                         }
  93                 }
  94
  95                 public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset)
  96                 {
  97                         return 0;
  98                 }
  99
 100                 public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
 101                 {
 102                         // Reset (); should be called here before returning final data
 103                         return null;
 104                 }
 105
 106 #if NET_2_0
 107                 public void Reset ()
 108                 {
 109                 }
 110 #endif
 111         }
 112 }