| /trunk/Winify/Utilities/AES.cs |
|---|
| @@ -0,0 +1,97 @@ |
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| /////////////////////////////////////////////////////////////////////////// |
| // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
| // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // |
| // rights of fair usage, the disclaimer and warranty conditions. // |
| /////////////////////////////////////////////////////////////////////////// |
| |
| using System.IO; |
| using System.Linq; |
| using System.Security.Cryptography; |
| |
| namespace Winify.Utilities |
| { |
| public static class AES |
| { |
| #region Static Fields and Constants |
| |
| private const int AESKeySaltBytes = 16; |
| |
| private static readonly RNGCryptoServiceProvider Rng = new RNGCryptoServiceProvider(); |
| |
| #endregion |
| |
| #region Public Methods |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
| /////////////////////////////////////////////////////////////////////////// |
| public static byte[] Encrypt(byte[] plain, string password) |
| { |
| using (var rijndael = Rijndael.Create()) |
| { |
| rijndael.BlockSize = 128; |
| rijndael.Mode = CipherMode.CBC; |
| rijndael.KeySize = 256; |
| rijndael.Padding = PaddingMode.PKCS7; |
| var salt = new byte[AESKeySaltBytes]; |
| Rng.GetBytes(salt); |
| var pdb = new Rfc2898DeriveBytes(password, salt, 1000); |
| rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8); |
| rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8); |
| |
| using (var memoryStream = new MemoryStream()) |
| { |
| using (var cryptoStream = |
| new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write)) |
| { |
| cryptoStream.Write(plain, 0, plain.Length); |
| cryptoStream.Close(); |
| |
| var ciphertext = memoryStream.ToArray(); |
| |
| return salt.Concat(ciphertext) |
| .ToArray(); |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // |
| /////////////////////////////////////////////////////////////////////////// |
| public static byte[] Decrypt(byte[] cipher, string password) |
| { |
| using (var rijndael = Rijndael.Create()) |
| { |
| rijndael.BlockSize = 128; |
| rijndael.Mode = CipherMode.CBC; |
| rijndael.KeySize = 256; |
| rijndael.Padding = PaddingMode.PKCS7; |
| |
| var salt = cipher.Take(16) |
| .ToArray(); |
| |
| var ciphertext = cipher.Skip(16) |
| .ToArray(); |
| |
| var pdb = new Rfc2898DeriveBytes(password, salt, 1000); |
| rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8); |
| rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8); |
| |
| using (var memoryStream = new MemoryStream()) |
| { |
| using (var cryptoStream = |
| new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write)) |
| { |
| cryptoStream.Write(ciphertext, 0, ciphertext.Length); |
| cryptoStream.Close(); |
| |
| return memoryStream.ToArray(); |
| } |
| } |
| } |
| } |
| |
| #endregion |
| } |
| } |
