SpeedportHybridControl.Implementations/Cryptography.cs

   1 using System;
   2 using System.Security.Cryptography;
   3 using System.Text;
   4
   5 namespace SpeedportHybridControl.Implementations
   6 {
   7     public static class Cryptography
   8     {
   9         private static string GetKeyFromContainer()
  10         {
  11             // store key in keycontainer, this generates a new key if none exist
  12             CspParameters cp = new CspParameters();
  13             cp.KeyContainerName = "SpeedportHybridControl";
  14             RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(2048, cp);
  15             string result = rsa.ToXmlString(true);
  16             rsa.Dispose();
  17
  18             return result;
  19         }
  20
  21         public static string Encrypt(string clearText)
  22         {
  23             RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
  24             byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
  25             rsa.FromXmlString(GetKeyFromContainer());
  26             string result = Convert.ToBase64String(rsa.Encrypt(clearBytes, true));
  27             rsa.Dispose();
  28
  29             return result;
  30         }
  31
  32         public static string Decrypt(string cipherText)
  33         {
  34             RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
  35             byte[] cipherBytes = Convert.FromBase64String(cipherText);
  36             rsa.FromXmlString(GetKeyFromContainer());
  37             string result = Encoding.Unicode.GetString(rsa.Decrypt(cipherBytes, true));
  38             rsa.Dispose();
  39
  40             return result;
  41         }
  42     }
  43 }