Function bsgs_secondcheck

keyhunt.cpp:4271–4304

The bsgs_secondcheck function is made to perform a second BSGS search in a Range of less size. This funtion is made with the especific purpouse to USE a smaller bPtable in RAM. */

	This funtion is made with the especific purpouse to USE a smaller bPtable in RAM.
*/
int bsgs_secondcheck(Int *start_range,uint32_t a,uint32_t k_index,Int *privatekey)	{
	int i = 0,found = 0,r = 0;
	Int base_key;
	Point base_point,point_aux;
	Point BSGS_Q, BSGS_S,BSGS_Q_AMP;
	char xpoint_raw[32];


	base_key.Set(&BSGS_M_double);
	base_key.Mult((uint64_t) a);
	base_key.Add(start_range);

	base_point = secp->ComputePublicKey(&base_key);
	point_aux = secp->Negation(base_point);

	/*
		BSGS_S = Q - base_key
				 Q is the target Key
		base_key is the Start range + a*BSGS_M
	*/
	BSGS_S = secp->AddDirect(OriginalPointsBSGS[k_index],point_aux);
	BSGS_Q.Set(BSGS_S);
	do {
		BSGS_Q_AMP = secp->AddDirect(BSGS_Q,BSGS_AMP2[i]);
		BSGS_S.Set(BSGS_Q_AMP);
		BSGS_S.x.Get32Bytes((unsigned char *) xpoint_raw);
		r = bloom_check(&bloom_bPx2nd[(uint8_t) xpoint_raw[0]],xpoint_raw,32);
		if(r)	{
			found = bsgs_thirdcheck(&base_key,i,k_index,privatekey);
		}
		i++;
	}while(i < 32 && !found);
	return found;
}

int bsgs_thirdcheck(Int *start_range,uint32_t a,uint32_t k_index,Int *privatekey)	{
	uint64_t j = 0;