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Use little-endian for hash personalisation and hashing indices

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The test vectors have been regenerated using the basic solver.
This commit is contained in:
Jack Grigg
2016-06-09 18:51:06 +12:00
parent d07cf62991
commit a6dcf2ee6f
2 changed files with 53 additions and 37 deletions
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21
src/crypto/equihash.cpp
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@@ -24,12 +24,16 @@
template<unsigned int N, unsigned int K>
int Equihash<N,K>::InitialiseState(eh_HashState& base_state)
{
unsigned int n = N;
unsigned int k = K;
unsigned char personalization[crypto_generichash_blake2b_PERSONALBYTES] = {};
memcpy(personalization, "ZcashPOW", 8);
memcpy(personalization+8, &n, 4);
memcpy(personalization+12, &k, 4);
memcpy(personalization, "ZcashPoW", 8);
personalization[8] = N & 0xFF;
personalization[9] = (N >> 8) & 0xFF;
personalization[10] = (N >> 16) & 0xFF;
personalization[11] = (N >> 24) & 0xFF;
personalization[12] = K & 0xFF;
personalization[13] = (K >> 8) & 0xFF;
personalization[14] = (K >> 16) & 0xFF;
personalization[15] = (K >> 24) & 0xFF;
return crypto_generichash_blake2b_init_salt_personal(&base_state,
NULL, 0, // No key.
N/8,
@@ -79,7 +83,12 @@ StepRow<WIDTH>::StepRow(unsigned int n, const eh_HashState& base_state, eh_index
{
eh_HashState state;
state = base_state;
crypto_generichash_blake2b_update(&state, (unsigned char*) &i, sizeof(eh_index));
unsigned char array[sizeof(eh_index)];
array[0] = i & 0xFF;
array[1] = (i >> 8) & 0xFF;
array[2] = (i >> 16) & 0xFF;
array[3] = (i >> 24) & 0xFF;
crypto_generichash_blake2b_update(&state, array, sizeof(eh_index));
crypto_generichash_blake2b_final(&state, hash, n/8);
}