152 lines
4.2 KiB
C
152 lines
4.2 KiB
C
// Copyright (c) 2012-2013 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include "common/int-util.h"
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#include "hash-ops.h"
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#include "oaes_lib.h"
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static void (*const extra_hashes[4])(const void *, size_t, char *) = {
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hash_extra_blake, hash_extra_groestl, hash_extra_jh, hash_extra_skein
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};
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#define MEMORY (1 << 21) /* 2 MiB */
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#define ITER (1 << 20)
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#define AES_BLOCK_SIZE 16
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#define AES_KEY_SIZE 32 /*16*/
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#define INIT_SIZE_BLK 8
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#define INIT_SIZE_BYTE (INIT_SIZE_BLK * AES_BLOCK_SIZE)
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static size_t e2i(const uint8_t* a, size_t count) { return (*((uint64_t*)a) / AES_BLOCK_SIZE) & (count - 1); }
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static void mul(const uint8_t* a, const uint8_t* b, uint8_t* res) {
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uint64_t a0, b0;
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uint64_t hi, lo;
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a0 = SWAP64LE(((uint64_t*)a)[0]);
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b0 = SWAP64LE(((uint64_t*)b)[0]);
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lo = mul128(a0, b0, &hi);
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((uint64_t*)res)[0] = SWAP64LE(hi);
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((uint64_t*)res)[1] = SWAP64LE(lo);
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}
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static void sum_half_blocks(uint8_t* a, const uint8_t* b) {
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uint64_t a0, a1, b0, b1;
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a0 = SWAP64LE(((uint64_t*)a)[0]);
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a1 = SWAP64LE(((uint64_t*)a)[1]);
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b0 = SWAP64LE(((uint64_t*)b)[0]);
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b1 = SWAP64LE(((uint64_t*)b)[1]);
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a0 += b0;
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a1 += b1;
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((uint64_t*)a)[0] = SWAP64LE(a0);
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((uint64_t*)a)[1] = SWAP64LE(a1);
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}
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static void copy_block(uint8_t* dst, const uint8_t* src) {
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memcpy(dst, src, AES_BLOCK_SIZE);
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}
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static void swap_blocks(uint8_t* a, uint8_t* b) {
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size_t i;
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uint8_t t;
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for (i = 0; i < AES_BLOCK_SIZE; i++) {
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t = a[i];
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a[i] = b[i];
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b[i] = t;
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}
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}
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static void xor_blocks(uint8_t* a, const uint8_t* b) {
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size_t i;
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for (i = 0; i < AES_BLOCK_SIZE; i++) {
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a[i] ^= b[i];
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}
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}
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#pragma pack(push, 1)
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union cn_slow_hash_state {
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union hash_state hs;
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struct {
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uint8_t k[64];
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uint8_t init[INIT_SIZE_BYTE];
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};
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};
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#pragma pack(pop)
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void cn_slow_hash(const void *data, size_t length, char *hash) {
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uint8_t long_state[MEMORY];
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union cn_slow_hash_state state;
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uint8_t text[INIT_SIZE_BYTE];
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uint8_t a[AES_BLOCK_SIZE];
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uint8_t b[AES_BLOCK_SIZE];
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uint8_t c[AES_BLOCK_SIZE];
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uint8_t d[AES_BLOCK_SIZE];
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size_t i, j;
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uint8_t aes_key[AES_KEY_SIZE];
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OAES_CTX* aes_ctx;
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hash_process(&state.hs, data, length);
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memcpy(text, state.init, INIT_SIZE_BYTE);
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memcpy(aes_key, state.hs.b, AES_KEY_SIZE);
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aes_ctx = oaes_alloc();
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oaes_key_import_data(aes_ctx, aes_key, AES_KEY_SIZE);
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for (i = 0; i < MEMORY / INIT_SIZE_BYTE; i++) {
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for (j = 0; j < INIT_SIZE_BLK; j++) {
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oaes_pseudo_encrypt_ecb(aes_ctx, &text[AES_BLOCK_SIZE * j]);
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}
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memcpy(&long_state[i * INIT_SIZE_BYTE], text, INIT_SIZE_BYTE);
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}
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for (i = 0; i < 16; i++) {
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a[i] = state.k[ i] ^ state.k[32 + i];
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b[i] = state.k[16 + i] ^ state.k[48 + i];
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}
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for (i = 0; i < ITER / 2; i++) {
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/* Dependency chain: address -> read value ------+
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* written value <-+ hard function (AES or MUL) <+
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* next address <-+
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*/
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/* Iteration 1 */
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j = e2i(a, MEMORY / AES_BLOCK_SIZE);
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copy_block(c, &long_state[j * AES_BLOCK_SIZE]);
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oaes_encryption_round(a, c);
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xor_blocks(b, c);
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swap_blocks(b, c);
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copy_block(&long_state[j * AES_BLOCK_SIZE], c);
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assert(j == e2i(a, MEMORY / AES_BLOCK_SIZE));
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swap_blocks(a, b);
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/* Iteration 2 */
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j = e2i(a, MEMORY / AES_BLOCK_SIZE);
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copy_block(c, &long_state[j * AES_BLOCK_SIZE]);
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mul(a, c, d);
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sum_half_blocks(b, d);
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swap_blocks(b, c);
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xor_blocks(b, c);
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copy_block(&long_state[j * AES_BLOCK_SIZE], c);
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assert(j == e2i(a, MEMORY / AES_BLOCK_SIZE));
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swap_blocks(a, b);
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}
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memcpy(text, state.init, INIT_SIZE_BYTE);
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oaes_key_import_data(aes_ctx, &state.hs.b[32], AES_KEY_SIZE);
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for (i = 0; i < MEMORY / INIT_SIZE_BYTE; i++) {
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for (j = 0; j < INIT_SIZE_BLK; j++) {
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xor_blocks(&text[j * AES_BLOCK_SIZE], &long_state[i * INIT_SIZE_BYTE + j * AES_BLOCK_SIZE]);
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oaes_pseudo_encrypt_ecb(aes_ctx, &text[j * AES_BLOCK_SIZE]);
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}
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}
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memcpy(state.init, text, INIT_SIZE_BYTE);
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hash_permutation(&state.hs);
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/*memcpy(hash, &state, 32);*/
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extra_hashes[state.hs.b[0] & 3](&state, 200, hash);
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oaes_free(&aes_ctx);
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}
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