Add Crypto++ sha256 implementation (C only, ASM elided for now)

Makefile.am

@@ -12,7 +12,7 @@ INCLUDES	= $(PTHREAD_FLAGS) -fno-strict-aliasing $(JANSSON_INCLUDES)
 bin_PROGRAMS	= minerd
 
 minerd_SOURCES	= cpu-miner.c sha256_generic.c sha256_4way.c sha256_via.c \
-		  util.c miner.h compat.h
+		  sha256_cryptopp.c util.c miner.h compat.h
 minerd_LDFLAGS	= $(PTHREAD_FLAGS)
 minerd_LDADD	= @LIBCURL@ @JANSSON_LIBS@ @PTHREAD_LIBS@
 

cpu-miner.c

@@ -39,6 +39,7 @@ enum sha256_algos {
 	ALGO_C,			/* plain C */
 	ALGO_4WAY,		/* parallel SSE2 */
 	ALGO_VIA,		/* VIA padlock */
+	ALGO_CRYPTOPP,		/* Crypto++ */
 };
 
 static const char *algo_names[] = {
@@ -49,6 +50,7 @@ static const char *algo_names[] = {
 #ifdef WANT_VIA_PADLOCK
 	[ALGO_VIA]		= "via",
 #endif
+	[ALGO_CRYPTOPP]		= "cryptopp",
 };
 
 bool opt_debug = false;
@@ -74,11 +76,12 @@ static struct option_help options_help[] = {
 	  "(-a XXX) Specify sha256 implementation:\n"
 	  "\tc\t\tLinux kernel sha256, implemented in C (default)"
 #ifdef WANT_SSE2_4WAY
-	  "\n\t4way\t\ttcatm's 4-way SSE2 implementation (EXPERIMENTAL)"
+	  "\n\t4way\t\ttcatm's 4-way SSE2 implementation"
 #endif
 #ifdef WANT_VIA_PADLOCK
 	  "\n\tvia\t\tVIA padlock implementation (EXPERIMENTAL)"
 #endif
+	  "\n\tcryptopp\tCrypto++ library implementation (EXPERIMENTAL)"
 	  },
 
 	{ "debug",
@@ -286,6 +289,11 @@ static void *miner_thread(void *thr_id_int)
 					  &hashes_done);
 			break;
 #endif
+		case ALGO_CRYPTOPP:
+			rc = scanhash_cryptopp(work.midstate, work.data + 64,
+				        work.hash1, work.hash, &hashes_done);
+			break;
+
 		}
 
 		hashmeter(thr_id, &tv_start, hashes_done);

miner.h

@@ -37,6 +37,9 @@ extern bool scanhash_via(const unsigned char *midstate, const unsigned char *dat
 extern bool scanhash_c(const unsigned char *midstate, unsigned char *data,
 	      unsigned char *hash1, unsigned char *hash,
 	      unsigned long *hashes_done);
+extern bool scanhash_cryptopp(const unsigned char *midstate,unsigned char *data,
+	      unsigned char *hash1, unsigned char *hash,
+	      unsigned long *hashes_done);
 
 extern int
 timeval_subtract (struct timeval *result, struct timeval *x, struct timeval *y);

sha256_cryptopp.c

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