class/corlib/System.Security.Cryptography/RijndaelManagedTransform.cs

   1 //
   2 // System.Security.Cryptography.RijndaelManagedTransform
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //
   7 // Copyright (C) 2004-2005 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 #if  !MOONLIGHT
  30
  31 using System.Runtime.InteropServices;
  32
  33 namespace System.Security.Cryptography {
  34
  35         // Notes: This class is "publicly" new in Fx 2.0 but was already
  36         // existing in Fx 1.0. So this new class is only calling the old
  37         // (and more general) one (RijndaelTransform) located in
  38         // RijndaelManaged.cs.
  39
  40         [ComVisible (true)]
  41         public sealed class RijndaelManagedTransform: ICryptoTransform, IDisposable {
  42
  43                 private RijndaelTransform _st;
  44                 private int _bs;
  45
  46                 internal RijndaelManagedTransform (Rijndael algo, bool encryption, byte[] key, byte[] iv)
  47                 {
  48                         _st = new RijndaelTransform (algo, encryption, key, iv);
  49                         _bs = algo.BlockSize;
  50                 }
  51
  52                 public int BlockSizeValue {
  53                         get { return _bs; }
  54                 }
  55
  56                 public bool CanTransformMultipleBlocks {
  57                         get { return _st.CanTransformMultipleBlocks; }
  58                 }
  59
  60                 public bool CanReuseTransform {
  61                         get { return _st.CanReuseTransform; }
  62                 }
  63
  64                 public int InputBlockSize {
  65                         get { return _st.InputBlockSize; }
  66                 }
  67
  68                 public int OutputBlockSize {
  69                         get { return _st.OutputBlockSize; }
  70                 }
  71
  72                 public void Clear ()
  73                 {
  74                         _st.Clear ();
  75                 }
  76
  77                 [MonoTODO ("Reset does nothing since CanReuseTransform return false.")]
  78                 public void Reset ()
  79                 {
  80                 }
  81
  82                 void System.IDisposable.Dispose ()
  83                 {
  84                         _st.Clear ();
  85                 }
  86
  87                 public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset)
  88                 {
  89                         return _st.TransformBlock (inputBuffer, inputOffset, inputCount, outputBuffer, outputOffset);
  90                 }
  91
  92                 public byte[] TransformFinalBlock (byte[] inputBuffer, int inputOffset, int inputCount)
  93                 {
  94                         return _st.TransformFinalBlock (inputBuffer, inputOffset, inputCount);
  95                 }
  96         }
  97 }
  98
  99 #endif