From b6cf57cea56bc22b2965fcc94a06068949cbe437 Mon Sep 17 00:00:00 2001
From: orignal <i2porignal@yandex.ru>
Date: Thu, 23 Mar 2017 14:00:48 -0400
Subject: [PATCH] use double GOST 34.11 for hash function

---
 src/main.cpp | 28 +++++++++-------------------
 src/main.h   |  8 ++++++--
 2 files changed, 15 insertions(+), 21 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index a0e6d90..e23f672 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -11,6 +11,7 @@
 #include "init.h"
 #include "ui_interface.h"
 #include "checkqueue.h"
+#include "Gost.h" // i2pd
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
@@ -4703,9 +4704,9 @@ bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
 
 void static LitecoinMiner(CWallet *pwallet)
 {
-    printf("AnoncoinMiner started\n");
+    printf("UnioncoinMiner started\n");
     SetThreadPriority(THREAD_PRIORITY_LOWEST);
-    RenameThread("anoncoin-miner");
+    RenameThread("unioncoin-miner");
 
     // Each thread has its own key and counter
     CReserveKey reservekey(pwallet);
@@ -4727,7 +4728,7 @@ void static LitecoinMiner(CWallet *pwallet)
         CBlock *pblock = &pblocktemplate->block;
         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 
-        printf("Running AnoncoinMiner with %"PRIszu" transactions in block (%u bytes)\n", pblock->vtx.size(),
+        printf("Running UnioncoinMiner with %"PRIszu" transactions in block (%u bytes)\n", pblock->vtx.size(),
                ::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION));
 
         //
@@ -4754,24 +4755,13 @@ void static LitecoinMiner(CWallet *pwallet)
             unsigned int nHashesDone = 0;
 
             uint256 thash;
-			// TODO:
-            //char scratchpad[SCRYPT_SCRATCHPAD_SIZE];
             loop
             {
-#if defined(USE_SSE2)
-                // Detection would work, but in cases where we KNOW it always has SSE2,
-                // it is faster to use directly than to use a function pointer or conditional.
-#if defined(_M_X64) || defined(__x86_64__) || defined(_M_AMD64) || (defined(MAC_OSX) && defined(__i386__))
-                // Always SSE2: x86_64 or Intel MacOS X
-               // scrypt_1024_1_1_256_sp_sse2(BEGIN(pblock->nVersion), BEGIN(thash), scratchpad);
-#else
-                // Detect SSE2: 32bit x86 Linux or Windows
-                //scrypt_1024_1_1_256_sp(BEGIN(pblock->nVersion), BEGIN(thash), scratchpad);
-#endif
-#else
-                // Generic scrypt
-                //scrypt_1024_1_1_256_sp_generic(BEGIN(pblock->nVersion), BEGIN(thash), scratchpad);
-#endif
+				// GOST 34.11-256 (GOST 34.11-512 (pblock->header))
+				uint8_t digest[64];
+				i2p::crypto::GOSTR3411_2012_512 ((const uint8_t *)(&pblock->nVersion), 80, digest);
+				i2p::crypto::GOSTR3411_2012_256 (digest, 64, thash.begin ());    
+
 
                 if (thash <= hashTarget)
                 {
diff --git a/src/main.h b/src/main.h
index a784e3e..6d4af7d 100644
--- a/src/main.h
+++ b/src/main.h
@@ -10,6 +10,8 @@
 #include "net.h"
 #include "script.h"
 
+#include "Gost.h" // i2pd
+
 #include <list>
 
 class CWallet;
@@ -1360,9 +1362,11 @@ public:
 
     uint256 GetPoWHash() const
     {
+		// GOST 34.11-256 (GOST 34.11-512 (header))
+		uint8_t digest[64];
+		i2p::crypto::GOSTR3411_2012_512 ((const uint8_t *)&nVersion, 80, digest);
         uint256 thash;
-	   // TODO:	
-       // scrypt_1024_1_1_256(BEGIN(nVersion), BEGIN(thash));
+		i2p::crypto::GOSTR3411_2012_256 (digest, 64, thash.begin ());
         return thash;
     }