private byte[] EncodeBlock(
byte[] input,
int inOff,
int inLen)
{
byte[] block = new byte[(bitSize + 7) / 8];
int r = padBits + 1;
int z = inLen;
int t = (bitSize + 13) / 16;
for (int i = 0; i < t; i += z)
{
if (i > t - z)
{
Array.Copy(input, inOff + inLen - (t - i),
block, block.Length - t, t - i);
}
else
{
Array.Copy(input, inOff, block, block.Length - (i + z), z);
}
}
for (int i = block.Length - 2 * t; i != block.Length; i += 2)
{
byte val = block[block.Length - t + i / 2];
block[i] = (byte)((shadows[(uint) (val & 0xff) >> 4] << 4)
| shadows[val & 0x0f]);
block[i + 1] = val;
}
block[block.Length - 2 * z] ^= (byte) r;
block[block.Length - 1] = (byte)((block[block.Length - 1] << 4) | 0x06);
int maxBit = (8 - (bitSize - 1) % 8);
int offSet = 0;
if (maxBit != 8)
{
block[0] &= (byte) ((ushort) 0xff >> maxBit);
block[0] |= (byte) ((ushort) 0x80 >> maxBit);
}
else
{
block[0] = 0x00;
block[1] |= 0x80;
offSet = 1;
}
return engine.ProcessBlock(block, offSet, block.Length - offSet);
}