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Update slow-hash.c 

1. Various optimizations for faster hashing performance.
This commit is contained in:
NoodleDoodleNoodleDoodleNoodleDoodleNoo 2014-05-17 16:25:00 -07:00
parent e4f7b92ff9
commit 49d55d3c30
1 changed files with 18 additions and 14 deletions
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32
src/crypto/slow-hash.c
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@ -22,6 +22,9 @@ static void (*const extra_hashes[4])(const void *, size_t, char *) = {
#define INIT_SIZE_BLK 8
#define INIT_SIZE_BYTE (INIT_SIZE_BLK * AES_BLOCK_SIZE)
extern int aesb_single_round(const uint8_t *in, uint8_t*out, const uint8_t *expandedKey);
extern int aesb_pseudo_round(const uint8_t *in, uint8_t *out, const uint8_t *expandedKey);
static size_t e2i(const uint8_t* a, size_t count) { return (*((uint64_t*)a) / AES_BLOCK_SIZE) & (count - 1); }
static void mul(const uint8_t* a, const uint8_t* b, uint8_t* res) {
@ -47,19 +50,20 @@ static void sum_half_blocks(uint8_t* a, const uint8_t* b) {
((uint64_t*)a)[0] = SWAP64LE(a0);
((uint64_t*)a)[1] = SWAP64LE(a1);
}
#define U64(x) ((uint64_t *) (x))
static void copy_block(uint8_t* dst, const uint8_t* src) {
memcpy(dst, src, AES_BLOCK_SIZE);
}
static void swap_blocks(uint8_t* a, uint8_t* b) {
size_t i;
uint8_t t;
for (i = 0; i < AES_BLOCK_SIZE; i++) {
t = a[i];
a[i] = b[i];
b[i] = t;
}
static void swap_blocks(uint8_t *a, uint8_t *b){
uint64_t t[2];
U64(t)[0] = U64(a)[0];
U64(t)[1] = U64(a)[1];
U64(a)[0] = U64(b)[0];
U64(a)[1] = U64(b)[1];
U64(b)[0] = U64(t)[0];
U64(b)[1] = U64(t)[1];
}
static void xor_blocks(uint8_t* a, const uint8_t* b) {
@ -89,17 +93,17 @@ void cn_slow_hash(const void *data, size_t length, char *hash) {
uint8_t d[AES_BLOCK_SIZE];
size_t i, j;
uint8_t aes_key[AES_KEY_SIZE];
OAES_CTX* aes_ctx;
oaes_ctx *aes_ctx;
hash_process(&state.hs, data, length);
memcpy(text, state.init, INIT_SIZE_BYTE);
memcpy(aes_key, state.hs.b, AES_KEY_SIZE);
aes_ctx = oaes_alloc();
aes_ctx = (oaes_ctx *) oaes_alloc();
oaes_key_import_data(aes_ctx, aes_key, AES_KEY_SIZE);
for (i = 0; i < MEMORY / INIT_SIZE_BYTE; i++) {
for (j = 0; j < INIT_SIZE_BLK; j++) {
oaes_pseudo_encrypt_ecb(aes_ctx, &text[AES_BLOCK_SIZE * j]);
aesb_pseudo_round(&text[AES_BLOCK_SIZE * j], &text[AES_BLOCK_SIZE * j], aes_ctx->key->exp_data);
}
memcpy(&long_state[i * INIT_SIZE_BYTE], text, INIT_SIZE_BYTE);
}
@ -117,7 +121,7 @@ void cn_slow_hash(const void *data, size_t length, char *hash) {
/* Iteration 1 */
j = e2i(a, MEMORY / AES_BLOCK_SIZE);
copy_block(c, &long_state[j * AES_BLOCK_SIZE]);
oaes_encryption_round(a, c);
aesb_single_round(c, c, a);
xor_blocks(b, c);
swap_blocks(b, c);
copy_block(&long_state[j * AES_BLOCK_SIZE], c);
@ -140,12 +144,12 @@ void cn_slow_hash(const void *data, size_t length, char *hash) {
for (i = 0; i < MEMORY / INIT_SIZE_BYTE; i++) {
for (j = 0; j < INIT_SIZE_BLK; j++) {
xor_blocks(&text[j * AES_BLOCK_SIZE], &long_state[i * INIT_SIZE_BYTE + j * AES_BLOCK_SIZE]);
oaes_pseudo_encrypt_ecb(aes_ctx, &text[j * AES_BLOCK_SIZE]);
aesb_pseudo_round(&text[AES_BLOCK_SIZE * j], &text[AES_BLOCK_SIZE * j], aes_ctx->key->exp_data);
}
}
memcpy(state.init, text, INIT_SIZE_BYTE);
hash_permutation(&state.hs);
/*memcpy(hash, &state, 32);*/
extra_hashes[state.hs.b[0] & 3](&state, 200, hash);
oaes_free(&aes_ctx);
oaes_free((OAES_CTX **) &aes_ctx);
}