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  1. using System;
  2. using System.IO;
  3. using System.Security.Cryptography;
  4. using System.Text;
  5.  
  6. public class Test
  7. {
  8. 	public static void Main()
  9. 	{
  10. 		var tempData = "This is the text to encrypt. It's not much, but it's all there is.";
  11. 		byte[] iv;
  12. 		byte[] key;
  13. 		byte[] encryptedData;
  14. 		using (var rijCrypto = new RijndaelManaged())
  15. 		{
  16. 		    rijCrypto.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
  17. 		    rijCrypto.KeySize = 256;
  18. 		    rijCrypto.GenerateIV();
  19. 		    rijCrypto.GenerateKey();
  20. 		    iv = new byte[rijCrypto.IV.Length];
  21. 		    rijCrypto.IV.CopyTo(iv, 0);
  22. 		    key = new byte[rijCrypto.Key.Length];
  23. 		    rijCrypto.Key.CopyTo(key, 0);
  24.  
  25. 		    using (var input = new MemoryStream(Encoding.Unicode.GetBytes(tempData)))
  26. 		    using (var output = new MemoryStream())
  27. 		    {
  28. 		        var encryptor = rijCrypto.CreateEncryptor();
  29.  
  30. 		        using (var cryptStream = new CryptoStream(output, encryptor, CryptoStreamMode.Write))
  31. 		        {
  32. 		            var buffer = new byte[1024];
  33. 		            var read = input.Read(buffer, 0, buffer.Length);
  34. 		            while (read > 0)
  35. 		            {
  36. 		                cryptStream.Write(buffer, 0, read);
  37. 		                read = input.Read(buffer, 0, buffer.Length);
  38. 		            }
  39. 		            cryptStream.FlushFinalBlock();
  40. 		            encryptedData = output.ToArray();
  41. 		        }
  42. 		    }
  43. 		}
  44.  
  45. 		using (var rijCrypto = new RijndaelManaged())
  46. 		{
  47. 		    rijCrypto.Padding = System.Security.Cryptography.PaddingMode.ISO10126;
  48. 		    rijCrypto.KeySize = 256;
  49. 		    rijCrypto.IV = iv;
  50. 		    rijCrypto.Key = key;
  51.  
  52. 		    using (var input = new MemoryStream(encryptedData))
  53. 		    using (var output = new MemoryStream())
  54. 		    {
  55. 		        var decryptor = rijCrypto.CreateDecryptor();
  56. 		        using (var cryptStream = new CryptoStream(input, decryptor, CryptoStreamMode.Read))
  57. 		        {
  58. 		            var buffer = new byte[1024];
  59. 		            var read = cryptStream.Read(buffer, 0, buffer.Length);
  60. 		            while (read > 0)
  61. 		            {
  62. 		                output.Write(buffer, 0, read);
  63. 		                read = cryptStream.Read(buffer, 0, buffer.Length);
  64. 		            }
  65. 		            cryptStream.Flush();
  66. 		            var result = Encoding.Unicode.GetString(output.ToArray());
  67. 		            Console.WriteLine(result);
  68. 		        }
  69. 		    }
  70. 		}
  71. 	}
  72. }
Success #stdin #stdout 0.03s 15468KB
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stdin
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Standard input is empty
stdout
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This is the text to encrypt. It's not much, but it's all there is.
https://ideone.com/iLzDIs
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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