--- /dev/null
+/*-
+ * Copyright 2009 Colin Percival, 2011 ArtForz, 2011 pooler, 2012 Balthazar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file was originally written by Colin Percival as part of the Tarsnap
+ * online backup system.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <xmmintrin.h>
+
+#include "scrypt_mine.h"
+#include "pbkdf2.h"
+
+#include "util.h"
+#include "net.h"
+
+extern bool fShutdown;
+extern bool fGenerateBitcoins;
+
+extern CBlockIndex* pindexBest;
+extern uint32_t nTransactionsUpdated;
+
+
+#if defined(__x86_64__)
+
+#define SCRYPT_3WAY
+#define SCRYPT_BUFFER_SIZE (3 * 131072 + 63)
+
+extern "C" int scrypt_best_throughput();
+extern "C" void scrypt_core(uint32_t *X, uint32_t *V);
+extern "C" void scrypt_core_2way(uint32_t *X, uint32_t *Y, uint32_t *V);
+extern "C" void scrypt_core_3way(uint32_t *X, uint32_t *Y, uint32_t *Z, uint32_t *V);
+
+#elif defined(__i386__)
+
+#define SCRYPT_BUFFER_SIZE (131072 + 63)
+
+extern "C" void scrypt_core(uint32_t *X, uint32_t *V);
+
+#endif
+
+void *scrypt_buffer_alloc() {
+ return malloc(SCRYPT_BUFFER_SIZE);
+}
+
+void scrypt_buffer_free(void *scratchpad)
+{
+ free(scratchpad);
+}
+
+/* cpu and memory intensive function to transform a 80 byte buffer into a 32 byte output
+ scratchpad size needs to be at least 63 + (128 * r * p) + (256 * r + 64) + (128 * r * N) bytes
+ r = 1, p = 1, N = 1024
+ */
+
+static void scrypt(const void* input, size_t inputlen, uint32_t *res, void *scratchpad)
+{
+ uint32_t *V;
+ uint32_t X[32];
+ V = (uint32_t *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));
+
+ PBKDF2_SHA256((const uint8_t*)input, inputlen, (const uint8_t*)input, sizeof(block_header), 1, (uint8_t *)X, 128);
+
+ scrypt_core(X, V);
+
+ PBKDF2_SHA256((const uint8_t*)input, inputlen, (uint8_t *)X, 128, 1, (uint8_t*)res, 32);
+}
+
+void scrypt_hash(const void* input, size_t inputlen, uint32_t *res, void *scratchpad)
+{
+ return scrypt(input, inputlen, res, scratchpad);
+}
+
+#ifdef SCRYPT_3WAY
+static void scrypt_2way(const void *input1, const void *input2, size_t input1len, size_t input2len, uint32_t *res1, uint32_t *res2, void *scratchpad)
+{
+ uint32_t *V;
+ uint32_t X[32], Y[32];
+ V = (uint32_t *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));
+
+ PBKDF2_SHA256((const uint8_t*)input1, input1len, (const uint8_t*)input1, input1len, 1, (uint8_t *)X, 128);
+ PBKDF2_SHA256((const uint8_t*)input2, input2len, (const uint8_t*)input2, input2len, 1, (uint8_t *)Y, 128);
+
+ scrypt_core_2way(X, Y, V);
+
+ PBKDF2_SHA256((const uint8_t*)input1, input1len, (uint8_t *)X, 128, 1, (uint8_t*)res1, 32);
+ PBKDF2_SHA256((const uint8_t*)input2, input2len, (uint8_t *)Y, 128, 1, (uint8_t*)res2, 32);
+}
+
+static void scrypt_3way(const void *input1, const void *input2, const void *input3,
+ size_t input1len, size_t input2len, size_t input3len, uint32_t *res1, uint32_t *res2, uint32_t *res3,
+ void *scratchpad)
+{
+ uint32_t *V;
+ uint32_t X[32], Y[32], Z[32];
+ V = (uint32_t *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63));
+
+ PBKDF2_SHA256((const uint8_t*)input1, input1len, (const uint8_t*)input1, input1len, 1, (uint8_t *)X, 128);
+ PBKDF2_SHA256((const uint8_t*)input2, input2len, (const uint8_t*)input2, input2len, 1, (uint8_t *)Y, 128);
+ PBKDF2_SHA256((const uint8_t*)input3, input3len, (const uint8_t*)input3, input3len, 1, (uint8_t *)Z, 128);
+
+ scrypt_core_3way(X, Y, Z, V);
+
+ PBKDF2_SHA256((const uint8_t*)input1, input1len, (uint8_t *)X, 128, 1, (uint8_t*)res1, 32);
+ PBKDF2_SHA256((const uint8_t*)input2, input2len, (uint8_t *)Y, 128, 1, (uint8_t*)res2, 32);
+ PBKDF2_SHA256((const uint8_t*)input3, input3len, (uint8_t *)Z, 128, 1, (uint8_t*)res3, 32);
+}
+#endif
+
+unsigned int scanhash_scrypt(block_header *pdata, void *scratchbuf,
+ uint32_t max_nonce, uint32_t &hash_count,
+ void *result, block_header *res_header)
+{
+ hash_count = 0;
+ block_header data = *pdata;
+ uint32_t hash[8];
+ unsigned char *hashc = (unsigned char *) &hash;
+
+#ifdef SCRYPT_3WAY
+ block_header data2 = *pdata;
+ uint32_t hash2[8];
+ unsigned char *hashc2 = (unsigned char *) &hash2;
+
+ block_header data3 = *pdata;
+ uint32_t hash3[8];
+ unsigned char *hashc3 = (unsigned char *) &hash3;
+
+ int throughput = scrypt_best_throughput();
+#endif
+
+ uint32_t n = 0;
+
+ while (true) {
+
+ data.nonce = n++;
+
+#ifdef SCRYPT_3WAY
+ if (throughput >= 2 && n < max_nonce) {
+ data2.nonce = n++;
+ if(throughput >= 3)
+ {
+ data3.nonce = n++;
+ scrypt_3way(&data, &data2, &data3, 80, 80, 80, hash, hash2, hash3, scratchbuf);
+ hash_count += 3;
+
+ if (hashc3[31] == 0 && hashc3[30] == 0) {
+ memcpy(result, hash3, 32);
+ *res_header = data3;
+
+ return data3.nonce;
+ }
+ }
+ else
+ {
+ scrypt_2way(&data, &data2, 80, 80, hash, hash2, scratchbuf);
+ hash_count += 2;
+ }
+
+ if (hashc2[31] == 0 && hashc2[30] == 0) {
+ memcpy(result, hash2, 32);
+
+ return data2.nonce;
+ }
+ } else {
+ scrypt(&data, 80, hash, scratchbuf);
+ hash_count += 1;
+ }
+#else
+ scrypt(&data, 80, hash, scratchbuf);
+ hash_count += 1;
+#endif
+ if (hashc[31] == 0 && hashc[30] == 0) {
+ memcpy(result, hash, 32);
+
+ return data.nonce;
+ }
+
+ if (n >= max_nonce) {
+ hash_count = 0xffff + 1;
+ break;
+ }
+ }
+
+ return (unsigned int) -1;
+}
git://git.novaco.in / novacoin.git / blobdiff