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eliminated sha256

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orignal 2017-03-28 16:00:55 -04:00
parent 893133867d
commit 755171a256
3 changed files with 4 additions and 31 deletions
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26
src/main.cpp
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@ -4294,27 +4294,6 @@ int static FormatHashBlocks(void* pbuffer, unsigned int len)
return blocks;
}
static const unsigned int pSHA256InitState[8] =
{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
void SHA256Transform(void* pstate, void* pinput, const void* pinit)
{
SHA256_CTX ctx;
unsigned char data[64];
SHA256_Init(&ctx);
for (int i = 0; i < 16; i++)
((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
for (int i = 0; i < 8; i++)
ctx.h[i] = ((uint32_t*)pinit)[i];
SHA256_Update(&ctx, data, sizeof(data));
for (int i = 0; i < 8; i++)
((uint32_t*)pstate)[i] = ctx.h[i];
}
// Some explaining would be appreciated
class COrphan
{
@ -4634,7 +4613,7 @@ void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int&
}
void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
void FormatHashBuffers(CBlock* pblock, char* pdata, char* phash1)
{
//
// Pre-build hash buffers
@ -4672,9 +4651,6 @@ void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash
for (unsigned int i = 0; i < sizeof(tmp)/4; i++)
((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
// Precalc the first half of the first hash, which stays constant
SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
memcpy(pdata, &tmp.block, 128);
memcpy(phash1, &tmp.hash1, 64);
}

2
src/main.h
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@ -163,7 +163,7 @@ CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey);
/** Modify the extranonce in a block */
void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
/** Do mining precalculation */
void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1);
void FormatHashBuffers(CBlock* pblock, char* pdata, char* phash1);
/** Check mined block */
bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey);
/** Check whether a block hash satisfies the proof-of-work requirement specified by nBits */

7
src/rpcmining.cpp
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@ -231,10 +231,9 @@ Value getworkex(const Array& params, bool fHelp)
mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
// Pre-build hash buffers
char pmidstate[32];
char pdata[128];
char phash1[64];
FormatHashBuffers(pblock, pmidstate, pdata, phash1);
FormatHashBuffers(pblock, pdata, phash1);
uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
@ -370,15 +369,13 @@ Value getwork(const Array& params, bool fHelp)
mapNewBlock[pblock->hashMerkleRoot] = make_pair(pblock, pblock->vtx[0].vin[0].scriptSig);
// Pre-build hash buffers
char pmidstate[32];
char pdata[128];
char phash1[64];
FormatHashBuffers(pblock, pmidstate, pdata, phash1);
FormatHashBuffers(pblock, pdata, phash1);
uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
Object result;
result.push_back(Pair("midstate", HexStr(BEGIN(pmidstate), END(pmidstate)))); // deprecated
result.push_back(Pair("data", HexStr(BEGIN(pdata), END(pdata))));
result.push_back(Pair("hash1", HexStr(BEGIN(phash1), END(phash1)))); // deprecated
result.push_back(Pair("target", HexStr(BEGIN(hashTarget), END(hashTarget))));