public int ProcessBlock(
byte[] input,
int inOff,
byte[] output,
int outOff)
{
if (key1 == null)
throw new InvalidOperationException("SKIPJACK engine not initialised");
if ((inOff + BLOCK_SIZE) > input.Length)
throw new DataLengthException("input buffer too short");
if ((outOff + BLOCK_SIZE) > output.Length)
throw new DataLengthException("output buffer too short");
if (encrypting)
{
EncryptBlock(input, inOff, output, outOff);
}
else
{
DecryptBlock(input, inOff, output, outOff);
}
return BLOCK_SIZE;
}