public void ZeroPaddingVector(byte[] input, int blockSize, byte[] reference)
{
var blkCipher = new NoOpSingleBlockTransform(blockSize);
var enc = new ZerosPaddingTransform(blkCipher, false);
var padded = enc.TransformFinalBlock(input, 0, input.Length);
Assert.Equal(reference.AsEnumerable(), padded);
Assert.True(enc.CanReuseTransform);
Assert.False(enc.CanTransformMultipleBlocks);
}
private ICryptoTransform CreateXfrm(byte[] rgbKey, byte[] rgbIV, bool decrypt)
{
ICryptoTransform xfrm = new SM4Transform(rgbKey, decrypt);
switch (Mode)
{
case CipherMode.ECB:
break;
case CipherMode.CBC:
xfrm = new CbcTransform(xfrm, rgbIV, decrypt);
break;
default:
throw new NotSupportedException("Only CBC/ECB is supported");
}
switch (PaddingValue)
{
case PaddingMode.None:
break;
case PaddingMode.PKCS7:
#pragma warning disable 618
case PaddingTransform.Iso10126:
case PaddingTransform.AnsiX923:
#pragma warning restore 618
xfrm = new PaddingTransform(xfrm, PaddingValue, decrypt);
break;
case PaddingMode.Zeros:
xfrm = new ZerosPaddingTransform(xfrm, decrypt);
break;
default:
throw new NotSupportedException("Only PKCS#7 padding is supported");
}
return(xfrm);
}
