internal TwofishManagedTransform(byte[] key, CipherMode mode, byte[] iv, TwofishManagedTransformMode transformMode, PaddingMode paddingMode)
{
this.TransformMode = transformMode;
this.PaddingMode = paddingMode;
var key32 = new uint[key.Length / 4];
Buffer.BlockCopy(key, 0, key32, 0, key.Length);
if (iv != null)
{
var iv32 = new uint[iv.Length / 4];
Buffer.BlockCopy(iv, 0, iv32, 0, iv.Length);
this.Implementation = new TwofishImplementation(key32, iv32, mode);
}
else
{
this.Implementation = new TwofishImplementation(key32, null, mode);
}
}
private ICryptoTransform NewEncryptor(byte[] rgbKey, CipherMode mode, byte[] rgbIV, TwofishManagedTransformMode encryptMode)
{
if (rgbKey == null)
{
rgbKey = new byte[this.KeySize / 8];
Rng.Value.GetBytes(rgbKey);
}
if ((mode != CipherMode.ECB) && (rgbIV == null))
{
rgbIV = new byte[this.KeySize / 8];
Rng.Value.GetBytes(rgbIV);
}
return(new TwofishManagedTransform(rgbKey, mode, rgbIV, encryptMode, this.Padding));
}
//private static readonly Lazy<RandomNumberGenerator> Rng = new Lazy<RandomNumberGenerator>(() => RandomNumberGenerator.Create());
private ICryptoTransform NewEncryptor(byte[] rgbKey, CipherMode mode, byte[] rgbIV, TwofishManagedTransformMode encryptMode)
{
if (rgbKey == null)
{
//rgbKey = new byte[KeySize / 8];
//Rng.Value.GetBytes(rgbKey);
throw new InvalidOperationException("Key is required");
}
if ((mode != CipherMode.ECB) && (rgbIV == null))
{
//rgbIV = new byte[KeySize / 8];
//Rng.Value.GetBytes(rgbIV);
throw new InvalidOperationException("IV is required");
}
return(new TwofishManagedTransform(rgbKey, mode, rgbIV, encryptMode, Padding));
}