Samples/MindDump/Castle.Applications.MindDump/Services/EncryptionService.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Applications.MindDump.Services
  16 {
  17         using System;
  18         using System.Text;
  19         using System.Security.Cryptography;
  20
  21
  22         public class EncryptionService
  23         {
  24                 private readonly byte[] _key;
  25                 private readonly byte[] _initVector;
  26
  27                 private DESCryptoServiceProvider _provider;
  28
  29                 public EncryptionService()
  30                 {
  31                         _provider = new DESCryptoServiceProvider();
  32                         _key = Encoding.Default.GetBytes("MyKeyCaS");
  33                         _initVector = Encoding.Default.GetBytes("itVector");
  34                 }
  35
  36                 public string Encrypt(string contents)
  37                 {
  38                         ICryptoTransform transform = _provider.CreateEncryptor(_key, _initVector);
  39
  40                         byte[] bArray = Encoding.Default.GetBytes(contents);
  41                         byte[] bOutput = transform.TransformFinalBlock( bArray, 0, bArray.Length);
  42
  43                         return  Convert.ToBase64String( bOutput );
  44                 }
  45
  46                 public string Decrypt(string contents)
  47                 {
  48                         ICryptoTransform transform = _provider.CreateDecryptor(_key, _initVector);
  49
  50 //                      byte[] bArray = Encoding.Default.GetBytes( Convert.FromBase64String( contents) );
  51                         byte[] bArray = Convert.FromBase64String(contents);
  52                         byte[] bOutput = transform.TransformFinalBlock( bArray, 0, bArray.Length );
  53
  54                         return Encoding.Default.GetString( bOutput );
  55                 }
  56         }
  57 }