SpeedportHybridControl.Implementations/Cryptography.cs

   1 using System;
   2 using System.IO;
   3 using System.Security.Cryptography;
   4 using System.Text;
   5
   6 namespace SpeedportHybridControl.Implementations
   7 {
   8     public static class Cryptography
   9     {
  10         private static string KEY = "8E16A57381AFDA47856682CEBE85DCF5982F59321AE28B2822C1C9E1FC481C50";
  11         private static string IV = "7CD37E78623793D4C4BB81DB73B08522";
  12
  13         public static string Encrypt(string clearText)
  14         {
  15             byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
  16             string result;
  17             using (Aes encryptor = Aes.Create())
  18             {
  19                 if (Object.Equals(encryptor, null))
  20                 {
  21                     result = null;
  22                     return result;
  23                 }
  24
  25                 encryptor.KeySize = 256;
  26                 encryptor.BlockSize = 128;
  27                 encryptor.Mode = CipherMode.CBC;
  28                 encryptor.Padding = PaddingMode.PKCS7;
  29                 encryptor.Key = util.HexToByte(KEY);
  30                 encryptor.IV = util.HexToByte(IV);
  31
  32                 using (MemoryStream ms = new MemoryStream())
  33                 {
  34                     using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
  35                     {
  36                         cs.Write(clearBytes, 0, clearBytes.Length);
  37                         cs.Close();
  38                     }
  39                     clearText = Convert.ToBase64String(ms.ToArray());
  40                 }
  41             }
  42             result = clearText;
  43             return result;
  44         }
  45
  46         public static string Decrypt(string cipherText)
  47         {
  48             byte[] cipherBytes = Convert.FromBase64String(cipherText);
  49             string result;
  50             using (Aes encryptor = Aes.Create())
  51             {
  52                 if (Object.Equals(encryptor, null))
  53                 {
  54                     result = null;
  55                     return result;
  56                 }
  57
  58                 encryptor.KeySize = 256;
  59                 encryptor.BlockSize = 128;
  60                 encryptor.Mode = CipherMode.CBC;
  61                 encryptor.Padding = PaddingMode.PKCS7;
  62                 encryptor.Key = util.HexToByte(KEY);
  63                 encryptor.IV = util.HexToByte(IV);
  64
  65                 using (MemoryStream ms = new MemoryStream())
  66                 {
  67                     using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
  68                     {
  69                         cs.Write(cipherBytes, 0, cipherBytes.Length);
  70                         cs.Close();
  71                     }
  72                     cipherText = Encoding.Unicode.GetString(ms.ToArray());
  73                 }
  74             }
  75             result = cipherText;
  76             return result;
  77         }
  78     }
  79 }