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class crypt { public static byte[] Encrypt(byte[] data, string password) { SymmetricAlgorithm sa = Rijndael.Create(); ICryptoTransform ct = sa.CreateEncryptor( (new PasswordDeriveBytes(password, null)).GetBytes(16), new byte[16]); MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, ct, CryptoStreamMode.Write); cs.Write(data, 0, data.Length); cs.FlushFinalBlock(); return ms.ToArray(); } public static string Encrypt(string data, string password) { return Convert.ToBase64String(Encrypt(Encoding.UTF8.GetBytes(data), password)); } static public byte[] Decrypt(byte[] data, string password) { BinaryReader br = new BinaryReader(InternalDecrypt(data, password)); return br.ReadBytes((int)br.BaseStream.Length); } static public string Decrypt(string data, string password) { CryptoStream cs = InternalDecrypt(Convert.FromBase64String(data), password); StreamReader sr = new StreamReader(cs); return sr.ReadToEnd(); } static CryptoStream InternalDecrypt(byte[] data, string password) { SymmetricAlgorithm sa = Rijndael.Create(); ICryptoTransform ct = sa.CreateDecryptor( (new PasswordDeriveBytes(password, null)).GetBytes(16), new byte[16]); MemoryStream ms = new MemoryStream(data); return new CryptoStream(ms, ct, CryptoStreamMode.Read); } }