private byte[] EncodeBlock(byte[] inBytes, int inOff, int inLen)
{
var block = new byte[GetInputBlockSize() + 1 + 2 * _defHash.Length];
//
// copy in the message
//
Array.Copy(inBytes, inOff, block, block.Length - inLen, inLen);
//
// add sentinel
//
block[block.Length - inLen - 1] = 0x01;
//
// as the block is already zeroed - there's no need to add PS (the >= 0 pad of 0)
//
//
// add the hash of the encoding params.
//
Array.Copy(_defHash, 0, block, _defHash.Length, _defHash.Length);
//
// generate the seed.
//
var seed = _random.GenerateSeed(_defHash.Length);
//
// mask the message block.
//
var mask = MaskGeneratorFunction1(seed, 0, seed.Length, block.Length - _defHash.Length);
for (var i = _defHash.Length; i != block.Length; i++)
{
block[i] ^= mask[i - _defHash.Length];
}
//
// add in the seed
//
Array.Copy(seed, 0, block, 0, _defHash.Length);
//
// mask the seed.
//
mask = MaskGeneratorFunction1(
block, _defHash.Length, block.Length - _defHash.Length, _defHash.Length);
for (var i = 0; i != _defHash.Length; i++)
{
block[i] ^= mask[i];
}
return(_engine.ProcessBlock(block, 0, block.Length));
}
protected virtual byte[] engineGenerateKey()
{
return(random.GenerateSeed(strength));
}
