Initial upload v3.4.7

algo/skein/skein.c

@@ -0,0 +1,80 @@
+#include "miner.h"
+#include "algo-gate-api.h"
+
+#include <string.h>
+#include <stdint.h>
+
+#include <openssl/sha.h>
+
+#include "sph_skein.h"
+
+typedef struct {
+        sph_skein512_context skein;
+        SHA256_CTX           sha256;
+} skein_ctx_holder;
+
+skein_ctx_holder skein_ctx;
+
+void init_skein_ctx()
+{
+        sph_skein512_init(&skein_ctx.skein);
+        SHA256_Init(&skein_ctx.sha256);
+}
+
+void skeinhash(void *state, const void *input)
+{
+     skein_ctx_holder ctx;
+     memcpy( &ctx, &skein_ctx, sizeof(skein_ctx) );
+     uint32_t hash[16];
+	
+     sph_skein512(&ctx.skein, input, 80);
+     sph_skein512_close(&ctx.skein, hash);
+
+     SHA256_Update(&ctx.sha256, hash, 64);
+     SHA256_Final((unsigned char*) hash, &ctx.sha256);
+
+     memcpy(state, hash, 32);
+}
+
+int scanhash_skein(int thr_id, struct work *work,
+	uint32_t max_nonce, uint64_t *hashes_done)
+{
+        uint32_t *pdata = work->data;
+        uint32_t *ptarget = work->target;
+	uint32_t _ALIGN(64) hash64[8];
+	uint32_t _ALIGN(64) endiandata[20];
+	const uint32_t Htarg = ptarget[7];
+	const uint32_t first_nonce = pdata[19];
+	uint32_t n = first_nonce;
+	
+        swab32_array( endiandata, pdata, 20 );
+
+	do {
+		be32enc(&endiandata[19], n); 
+		skeinhash(hash64, endiandata);
+		if (hash64[7] < Htarg && fulltest(hash64, ptarget)) {
+			*hashes_done = n - first_nonce + 1;
+			pdata[19] = n;
+			return true;
+		}
+		n++;
+
+	} while (n < max_nonce && !work_restart[thr_id].restart);
+
+	*hashes_done = n - first_nonce + 1;
+	pdata[19] = n;
+
+	return 0;
+}
+
+int64_t skein_get_max64() { return 0x7ffffLL; }
+
+bool register_skein_algo( algo_gate_t* gate )
+{
+    init_skein_ctx();
+    gate->scanhash  = (void*)&scanhash_skein;
+    gate->hash      = (void*)&skeinhash;
+    gate->get_max64 = (void*)&skein_get_max64;
+    return true;
+};
+