Encrypt/Decrypt with ease (Rijndael, TripleDES, DES, RC2) - C#

SUBMITTED BY: emmek

DATE: May 19, 2022, 10:59 p.m.

FORMAT: C#

SIZE: 3.7 kB

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  1. using System;
  2. using System.Security.Cryptography;
  3. using System.Text;
  5. namespace HackForums.gigajew
  6. {
  7. /// <summary>
  8. /// Created by gigajew@hf
  9. /// </summary>
  10. public sealed class MultiCrypt
  11. {
  12. public string Key
  13. {
  14. get { return Convert.ToBase64String(_key); }
  15. set { _key = Convert.FromBase64String(value); }
  16. }
  18. public string IV
  19. {
  20. get { return Convert.ToBase64String(_iv); }
  21. set { _iv = Convert.FromBase64String(value); }
  22. }
  24. public void GenerateKey(MultiCryptType type)
  25. {
  26. SymmetricAlgorithm symmetricAlgorithm;
  27. using (symmetricAlgorithm = FromMultiCryptType(type))
  28. {
  29. symmetricAlgorithm.GenerateKey();
  30. _key = symmetricAlgorithm.Key;
  31. }
  32. }
  34. public void GenerateIV(MultiCryptType type)
  35. {
  36. SymmetricAlgorithm symmetricAlgorithm;
  37. using (symmetricAlgorithm = FromMultiCryptType(type))
  38. {
  39. symmetricAlgorithm.GenerateIV();
  40. _iv = symmetricAlgorithm.IV;
  41. }
  42. }
  44. public byte[] Encrypt(MultiCryptType type, byte[] data)
  45. {
  46. if (_key == null)
  47. GenerateKey(type);
  49. if (_iv == null)
  50. GenerateIV(type);
  52. SymmetricAlgorithm symmetricAlgorithm;
  53. using (symmetricAlgorithm = FromMultiCryptType(type))
  54. {
  55. symmetricAlgorithm.Key = _key;
  56. symmetricAlgorithm.IV = _iv;
  57. using (ICryptoTransform transformer = symmetricAlgorithm.CreateEncryptor())
  58. {
  59. return transformer.TransformFinalBlock(data, 0, data.Length);
  60. }
  61. }
  62. }
  64. public string Encrypt(MultiCryptType type, string data)
  65. {
  66. return Convert.ToBase64String(Encrypt(type, Encoding.UTF8.GetBytes(data)));
  67. }
  69. public byte[] Decrypt(MultiCryptType type, byte[] data)
  70. {
  71. if (_key == null)
  72. GenerateKey(type);
  74. if (_iv == null)
  75. GenerateIV(type);
  77. SymmetricAlgorithm symmetricAlgorithm;
  78. using (symmetricAlgorithm = FromMultiCryptType(type))
  79. {
  80. symmetricAlgorithm.Key = _key;
  81. symmetricAlgorithm.IV = _iv;
  82. using (ICryptoTransform transformer = symmetricAlgorithm.CreateDecryptor())
  83. {
  84. return transformer.TransformFinalBlock(data, 0, data.Length);
  85. }
  86. }
  87. }
  89. public string Decrypt(MultiCryptType type, string data)
  90. {
  91. return Encoding.UTF8.GetString(Decrypt(type, Convert.FromBase64String(data)));
  92. }
  94. private SymmetricAlgorithm FromMultiCryptType(MultiCryptType type)
  95. {
  96. switch (type)
  97. {
  98. case MultiCryptType.Rijndael:
  99. return RijndaelManaged.Create();
  100. case MultiCryptType.TripleDES:
  101. return TripleDES.Create();
  102. case MultiCryptType.DES:
  103. return DES.Create();
  104. case MultiCryptType.RC2:
  105. return RC2.Create();
  106. default:
  107. return RijndaelManaged.Create();
  108. }
  109. }
  111. private byte[] _key;
  112. private byte[] _iv;
  113. }
  115. public enum MultiCryptType
  116. {
  117. Rijndael, TripleDES, DES, RC2
  118. }
  119. }
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