/* CryptoNight Step 4: Sequentially pass through the mixing buffer
* and use 10 rounds of AES encryption to mix the random data back
* into the 'text' buffer.
*/
private static void EncryptScratchpadToText(CNState cnState,
ICryptoNight cnParams,
byte[] scratchpad)
{
/* Reinitialize text from state */
byte[] text = cnState.GetText();
/* Expand our initial key into many for each round of pseudo aes */
byte[] expandedKeys = AES.ExpandKey(cnState.GetAESKey2(), false);
for (int i = 0; i < cnParams.InitRounds; i++)
{
for (int j = 0; j < Constants.INIT_SIZE_BLOCK; j++)
{
int offsetA = j * AES.BLOCK_SIZE;
int offsetB = (i * Constants.INIT_SIZE_BYTE) + offsetA;
XORBlocks(text, scratchpad, offsetA, offsetB);
/* Need to pass the array with an offset because we manip
* it in place */
AES.AESBPseudoRound(expandedKeys, text, offsetA);
}
}
cnState.SetText(text);
}
/* CryptoNight Step 4: Sequentially pass through the mixing buffer
* and use 10 rounds of AES encryption to mix the random data back
* into the 'text' buffer.
*/
private static void EncryptScratchpadToText(CNState cnState,
ICryptoNight cnParams,
byte[] scratchpad)
{
/* Reinitialize text from state */
byte[] text = cnState.GetText();
/* Expand our initial key into many for each round of pseudo aes */
byte[] expandedKeys = AES.ExpandKey(cnState.GetAESKey2(), true);
for (int i = 0; i < cnParams.InitRounds; i++)
{
AES.AESPseudoRoundXOR(
expandedKeys,
text,
scratchpad,
i * Constants.INIT_SIZE_BYTE
);
}
cnState.SetText(text);
}
