133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "miner.h"
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typedef uint32_t word32;
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static word32 rotrFixed(word32 word, unsigned int shift)
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{
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return (word >> shift) | (word << (32 - shift));
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}
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#define blk0(i) (W[i] = data[i])
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static const word32 SHA256_K[64] = {
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
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0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
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0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
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0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
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0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
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0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
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0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
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0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
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0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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};
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#define blk2(i) (W[i&15]+=s1(W[(i-2)&15])+W[(i-7)&15]+s0(W[(i-15)&15]))
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#define Ch(x,y,z) (z^(x&(y^z)))
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#define Maj(x,y,z) (y^((x^y)&(y^z)))
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#define a(i) T[(0-i)&7]
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#define b(i) T[(1-i)&7]
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#define c(i) T[(2-i)&7]
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#define d(i) T[(3-i)&7]
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#define e(i) T[(4-i)&7]
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#define f(i) T[(5-i)&7]
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#define g(i) T[(6-i)&7]
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#define h(i) T[(7-i)&7]
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#define R(i) h(i)+=S1(e(i))+Ch(e(i),f(i),g(i))+SHA256_K[i+j]+(j?blk2(i):blk0(i));\
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d(i)+=h(i);h(i)+=S0(a(i))+Maj(a(i),b(i),c(i))
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// for SHA256
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#define S0(x) (rotrFixed(x,2)^rotrFixed(x,13)^rotrFixed(x,22))
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#define S1(x) (rotrFixed(x,6)^rotrFixed(x,11)^rotrFixed(x,25))
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#define s0(x) (rotrFixed(x,7)^rotrFixed(x,18)^(x>>3))
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#define s1(x) (rotrFixed(x,17)^rotrFixed(x,19)^(x>>10))
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static void SHA256_Transform(word32 *state, const word32 *data)
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{
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word32 W[16];
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word32 T[8];
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unsigned int j;
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/* Copy context->state[] to working vars */
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memcpy(T, state, sizeof(T));
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/* 64 operations, partially loop unrolled */
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for (j=0; j<64; j+=16)
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{
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R( 0); R( 1); R( 2); R( 3);
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R( 4); R( 5); R( 6); R( 7);
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R( 8); R( 9); R(10); R(11);
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R(12); R(13); R(14); R(15);
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}
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/* Add the working vars back into context.state[] */
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state[0] += a(0);
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state[1] += b(0);
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state[2] += c(0);
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state[3] += d(0);
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state[4] += e(0);
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state[5] += f(0);
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state[6] += g(0);
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state[7] += h(0);
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}
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static void runhash(void *state, const void *input, const void *init)
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{
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memcpy(state, init, 32);
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SHA256_Transform(state, input);
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}
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/* suspiciously similar to ScanHash* from bitcoin */
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bool scanhash_cryptopp(const unsigned char *midstate, unsigned char *data,
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unsigned char *hash1, unsigned char *hash,
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unsigned long *hashes_done)
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{
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uint32_t *hash32 = (uint32_t *) hash;
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uint32_t *nonce = (uint32_t *)(data + 12);
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uint32_t n = 0;
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unsigned long stat_ctr = 0;
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while (1) {
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n++;
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*nonce = n;
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runhash(hash1, data, midstate);
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runhash(hash, hash1, sha256_init_state);
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stat_ctr++;
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if (hash32[7] == 0) {
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char *hexstr;
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hexstr = bin2hex(hash, 32);
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fprintf(stderr,
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"DBG: found zeroes in hash:\n%s\n",
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hexstr);
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free(hexstr);
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*hashes_done = stat_ctr;
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return true;
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}
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if ((n & 0xffffff) == 0) {
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if (opt_debug)
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fprintf(stderr, "DBG: end of nonce range\n");
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*hashes_done = stat_ctr;
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return false;
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}
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}
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}
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