ISO7816d4Padding public class ISO7816d4Padding : IBlockCipherPadding A padder that adds the padding according to the scheme referenced in ISO 7814-4 - scheme 2 from ISO 9797-1. The first byte is 0x80, rest is 0x00 Documentation Code public string PaddingName { get; } public ISO7816d4Padding() public int AddPadding(byte[] input, int inOff) public int AddPadding(Span<byte> block, int position) public void Init(SecureRandom random) public int PadCount(byte[] input) public int PadCount(ReadOnlySpan<byte> block)