Implement CryptoNight Dark hashing algorithm

[cmarshall108]

CryoNote uses the CryptoNight-Dark hashing algorithm which is optimized for CPU based mining.

Specifications

• Memory: 1 << 19 (524288)
• Iter: 1 << 18 (262144)

Last 4 states of the CryptoNight hashing algorithm is replaced with just blake256 in order to achieve more efficient stable hashrate...

#define MEMORY         (1 << 19) /* 0.5 MiB */
#define ITER           (1 << 18)
#define AES_BLOCK_SIZE  16
#define AES_KEY_SIZE    32 /*16*/
#define INIT_SIZE_BLK   8
#define INIT_SIZE_BYTE (INIT_SIZE_BLK * AES_BLOCK_SIZE)

  memcpy(state.init, text, INIT_SIZE_BYTE);
  hash_permutation(&state.hs);
  hash_extra_blake(&state, 200, hash);
  oaes_free((OAES_CTX **)&aes_ctx);
  free(long_state);

Source: slow-hash.c

Links

CryoNote Website CryoNote Github Repository

[jceminer]

Nice, a 512K scratchpad variant, that would be fine to mine on older CPUs I'll take a look, thanks!

[jceminer]

looks easy to implement but where can i get a pool to mine on? jce miner is for pool mining only, no solo-mining

[cmarshall108]

Feel free to checkout this pool:

• https://crypto9coin.cf/xcn/

[jceminer]

That's exactly what I needed, thanks!

[jceminer]

Done, in 0.33f --variation 17

[cmarshall108]

Great, thanks!

[cmarshall108]

I do have a proposed feature that will be implemented into the algorithm. Essentially this feature allows you to mine and submit hash’s using both BLAKE2b and BLAKE2s which gives x32 and x64 machines absolute optimal performance. Currently CryptoNight Dark uses BLAKE2s...

[jceminer]

The cost of the Blake256 on PC is negligible compared to the whole cryptonight loops (even on the Dark one where the loop is shorter). Don't spend time tweaking that part of algo to give advantage to x86/x64. Even the Keccak part takes more time than the Blake.

[jceminer]

The standalone .exe for GPU is an experimental version with some new features, including CN-Dark for GPU, in case you want to take a look.

[cmarshall108]

Will do, thanks.