public void InvalidPaddingThrows(byte[] error, int blockSize)
{
var blkCipher = new NoOpTransform(blockSize);
var dec = new PaddingTransform(blkCipher, PaddingMode.PKCS7, true);
Assert.True(dec.CanReuseTransform);
Assert.True(dec.CanTransformMultipleBlocks);
Assert.Throws <CryptographicException>(() => dec.TransformFinalBlock(error, 0, error.Length));
}
public void Pkcs7PaddingVector(byte[] input, int blockSize, byte[] reference)
{
var blkCipher = new NoOpSingleBlockTransform(blockSize);
var enc = new PaddingTransform(blkCipher, PaddingMode.PKCS7, false);
var dec = new PaddingTransform(blkCipher, PaddingMode.PKCS7, true);
var padded = enc.TransformFinalBlock(input, 0, input.Length);
Assert.Equal(reference.AsEnumerable(), padded);
using (var unPadded = new MemoryStream()) {
using (var cryptoStream = new CryptoStream(unPadded, dec, CryptoStreamMode.Write)) {
for (var i = 0; i < padded.Length; i += blockSize)
{
cryptoStream.Write(padded, i, blockSize);
}
}
Assert.Equal(input.AsEnumerable(), unPadded.ToArray());
}
Assert.True(enc.CanReuseTransform);
Assert.False(enc.CanTransformMultipleBlocks);
}