public static byte[] Decrypt(this byte[] Data,
DeriveBytes Key,
SymmetricAlgorithm AlgorithmUsing = null,
string InitialVector = "OFRna73m*aze01xY",
int KeySize = 256)
{
Contract.Requires <ArgumentNullException>(!string.IsNullOrEmpty(InitialVector), "InitialVector");
if (Data == null)
{
return(null);
}
AlgorithmUsing = AlgorithmUsing.Check(() => new RijndaelManaged());
using (DeriveBytes DerivedPassword = Key)
{
using (SymmetricAlgorithm SymmetricKey = AlgorithmUsing)
{
SymmetricKey.Mode = CipherMode.CBC;
byte[] PlainTextBytes = null;
using (ICryptoTransform Decryptor = SymmetricKey.CreateDecryptor(DerivedPassword.GetBytes(KeySize / 8), InitialVector.ToByteArray()))
{
using (MemoryStream MemStream = new MemoryStream(Data))
{
using (CryptoStream CryptoStream = new CryptoStream(MemStream, Decryptor, CryptoStreamMode.Read))
{
PlainTextBytes = CryptoStream.ReadAllBinary();
}
}
}
SymmetricKey.Clear();
return(PlainTextBytes);
}
}
}