public IHashAlgorithm CreateAlgoObject(string name)
{
IHashAlgorithm algo = null;
switch (name)
{
case "Skein":
algo = new Skein.Skein();
break;
}
return(algo);
}
/* CryptoNight Step 5: Apply Keccak to the state again, and then
* use the resulting data to select which of four finalizer
* hash functions to apply to the data (Blake, Groestl, JH,
* or Skein). Use this hash to squeeze the state array down
* to the final 32 byte hash output.
*/
private static byte[] HashFinalState(CNState cnState)
{
/* Get the state buffer as an array of ulongs rather than bytes */
ulong[] hashState = cnState.GetHashState();
Keccak.Keccak.keccakf(hashState, 24);
/* Set the state buffer from the coerced hash state */
cnState.SetHashState(hashState);
/* Get the actual state buffer finally */
byte[] state = cnState.GetState();
IHashProvider p;
/* Choose the final hashing function to use based on the value of
* state[0] */
switch (state[0] % 4)
{
case 0:
{
p = new Blake.Blake();
return(p.Hash(state));
}
case 1:
{
p = new Groestl.Groestl();
return(p.Hash(state));
}
case 2:
{
p = new JH.JH();
return(p.Hash(state));
}
default:
{
p = new Skein.Skein();
return(p.Hash(state));
}
}
}
