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Kangaroo.cpp
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Kangaroo.cpp
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/*
* This file is part of the BSGS distribution (https://github.com/JeanLucPons/Kangaroo).
* Copyright (c) 2020 Jean Luc PONS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http:https://www.gnu.org/licenses/>.
*/
#include "Kangaroo.h"
#include <fstream>
#include "SECPK1/IntGroup.h"
#include "Timer.h"
#include <string.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <algorithm>
#ifndef WIN64
#include <pthread.h>
#endif
using namespace std;
#define safe_delete_array(x) \
if (x) \
{ \
delete[] x; \
x = NULL; \
}
// ----------------------------------------------------------------------------
Kangaroo::Kangaroo(Secp256K1 *secp, int32_t initDPSize, bool useGpu, string &workFile, string &iWorkFile, uint32_t savePeriod, bool saveKangaroo, bool saveKangarooByServer,
double maxStep, int wtimeout, int port, int ntimeout, string serverIp, string outputFile, bool splitWorkfile)
{
this->secp = secp;
this->initDPSize = initDPSize;
this->useGpu = useGpu;
this->offsetCount = 0;
this->offsetTime = 0.0;
this->workFile = workFile;
this->saveWorkPeriod = savePeriod;
this->inputFile = iWorkFile;
this->nbLoadedWalk = 0;
this->clientMode = serverIp.length() > 0;
this->saveKangarooByServer = this->clientMode && saveKangarooByServer;
this->saveKangaroo = saveKangaroo || this->saveKangarooByServer;
this->fRead = NULL;
this->maxStep = maxStep;
this->wtimeout = wtimeout;
this->port = port;
this->ntimeout = ntimeout;
this->serverIp = serverIp;
this->outputFile = outputFile;
this->hostInfo = NULL;
this->endOfSearch = false;
this->saveRequest = false;
this->connectedClient = 0;
this->totalRW = 0;
this->collisionInSameHerd = 0;
this->keyIdx = 0;
this->splitWorkfile = splitWorkfile;
this->pid = Timer::getPID();
CPU_GRP_SIZE = 1024;
// Init mutex
#ifdef WIN64
ghMutex = CreateMutex(NULL, FALSE, NULL);
saveMutex = CreateMutex(NULL, FALSE, NULL);
#else
pthread_mutex_init(&ghMutex, NULL);
pthread_mutex_init(&saveMutex, NULL);
signal(SIGPIPE, SIG_IGN);
#endif
}
// ----------------------------------------------------------------------------
bool Kangaroo::ParseConfigFile(std::string &fileName)
{
// In client mode, config come from the server
if (clientMode)
return true;
// Check file
FILE *fp = fopen(fileName.c_str(), "rb");
if (fp == NULL)
{
::printf("Error: Cannot open %s %s\n", fileName.c_str(), strerror(errno));
return false;
}
fclose(fp);
// Get lines
vector<string> lines;
int nbLine = 0;
string line;
ifstream inFile(fileName);
while (getline(inFile, line))
{
// Remove ending \r\n
int l = (int)line.length() - 1;
while (l >= 0 && isspace(line.at(l)))
{
line.pop_back();
l--;
}
if (line.length() > 0)
{
lines.push_back(line);
nbLine++;
}
}
if (lines.size() < 3)
{
::printf("Error: %s not enough arguments\n", fileName.c_str());
return false;
}
rangeStart.SetBase16((char *)lines[0].c_str());
rangeEnd.SetBase16((char *)lines[1].c_str());
for (int i = 2; i < (int)lines.size(); i++)
{
Point p;
bool isCompressed;
if (!secp->ParsePublicKeyHex(lines[i], p, isCompressed))
{
::printf("%s, error line %d: %s\n", fileName.c_str(), i, lines[i].c_str());
return false;
}
keysToSearch.push_back(p);
}
::printf("Start:%s\n", rangeStart.GetBase16().c_str());
::printf("Stop :%s\n", rangeEnd.GetBase16().c_str());
::printf("Keys :%d\n", (int)keysToSearch.size());
return true;
}
// ----------------------------------------------------------------------------
bool Kangaroo::IsDP(uint64_t x)
{
return (x & dMask) == 0;
}
void Kangaroo::SetDP(int size)
{
// Mask for distinguised point
dpSize = size;
if (dpSize == 0)
{
dMask = 0;
}
else
{
if (dpSize > 64)
dpSize = 64;
dMask = (1ULL << (64 - dpSize)) - 1;
dMask = ~dMask;
}
#ifdef WIN64
::printf("DP size: %d [0x%016I64X]\n", dpSize, dMask);
#else
::printf("DP size: %d [0x%" PRIx64 "]\n", dpSize, dMask);
#endif
}
// ----------------------------------------------------------------------------
bool Kangaroo::Output(Int *pk, char sInfo, int sType)
{
FILE *f = stdout;
bool needToClose = false;
if (outputFile.length() > 0)
{
f = fopen(outputFile.c_str(), "a");
if (f == NULL)
{
printf("Cannot open %s for writing\n", outputFile.c_str());
f = stdout;
}
else
{
needToClose = true;
}
}
if (!needToClose)
::printf("\n");
Point PR = secp->ComputePublicKey(pk);
::fprintf(f, "Key#%2d [%d%c]Pub: 0x%s \n", keyIdx, sType, sInfo, secp->GetPublicKeyHex(true, keysToSearch[keyIdx]).c_str());
if (PR.equals(keysToSearch[keyIdx]))
{
::fprintf(f, " Priv: 0x%s \n", pk->GetBase16().c_str());
}
else
{
::fprintf(f, " Failed !\n");
if (needToClose)
fclose(f);
return false;
}
if (needToClose)
fclose(f);
return true;
}
// ----------------------------------------------------------------------------
bool Kangaroo::CheckKey(Int d1, Int d2, uint8_t type)
{
// Resolve equivalence collision
if (type & 0x1)
d1.ModNegK1order();
if (type & 0x2)
d2.ModNegK1order();
Int pk(&d1);
pk.ModAddK1order(&d2);
Point P = secp->ComputePublicKey(&pk);
if (P.equals(keyToSearch))
{
// Key solved
#ifdef USE_SYMMETRY
pk.ModAddK1order(&rangeWidthDiv2);
#endif
pk.ModAddK1order(&rangeStart);
return Output(&pk, 'N', type);
}
if (P.equals(keyToSearchNeg))
{
// Key solved
pk.ModNegK1order();
#ifdef USE_SYMMETRY
pk.ModAddK1order(&rangeWidthDiv2);
#endif
pk.ModAddK1order(&rangeStart);
return Output(&pk, 'S', type);
}
return false;
}
bool Kangaroo::CollisionCheck(Int *d1, uint32_t type1, Int *d2, uint32_t type2)
{
if (type1 == type2)
{
// Collision inside the same herd
return false;
}
else
{
Int Td;
Int Wd;
if (type1 == TAME)
{
Td.Set(d1);
Wd.Set(d2);
}
else
{
Td.Set(d2);
Wd.Set(d1);
}
endOfSearch = CheckKey(Td, Wd, 0) || CheckKey(Td, Wd, 1) || CheckKey(Td, Wd, 2) || CheckKey(Td, Wd, 3);
if (!endOfSearch)
{
// Should not happen, reset the kangaroo
::printf("\n Unexpected wrong collision, reset kangaroo !\n");
if ((int64_t)(Td.bits64[3]) < 0)
{
Td.ModNegK1order();
::printf("Found: Td-%s\n", Td.GetBase16().c_str());
}
else
{
::printf("Found: Td %s\n", Td.GetBase16().c_str());
}
if ((int64_t)(Wd.bits64[3]) < 0)
{
Wd.ModNegK1order();
::printf("Found: Wd-%s\n", Wd.GetBase16().c_str());
}
else
{
::printf("Found: Wd %s\n", Wd.GetBase16().c_str());
}
return false;
}
}
return true;
}
// ----------------------------------------------------------------------------
bool Kangaroo::AddToTable(Int *pos, Int *dist, uint32_t kType)
{
int addStatus = hashTable.Add(pos, dist, kType);
if (addStatus == ADD_COLLISION)
return CollisionCheck(&hashTable.kDist, hashTable.kType, dist, kType);
return addStatus == ADD_OK;
}
bool Kangaroo::AddToTable(uint64_t h, int128_t *x, int128_t *d)
{
int addStatus = hashTable.Add(h, x, d);
if (addStatus == ADD_COLLISION)
{
Int dist;
uint32_t kType;
HashTable::CalcDistAndType(*d, &dist, &kType);
return CollisionCheck(&hashTable.kDist, hashTable.kType, &dist, kType);
}
return addStatus == ADD_OK;
}
// ----------------------------------------------------------------------------
void Kangaroo::SolveKeyCPU(TH_PARAM *ph)
{
vector<ITEM> dps;
double lastSent = 0;
// Global init
int thId = ph->threadId;
// Create Kangaroos
ph->nbKangaroo = CPU_GRP_SIZE;
#ifdef USE_SYMMETRY
ph->symClass = new uint64_t[CPU_GRP_SIZE];
for (int i = 0; i < CPU_GRP_SIZE; i++)
ph->symClass[i] = 0;
#endif
IntGroup *grp = new IntGroup(CPU_GRP_SIZE);
Int *dx = new Int[CPU_GRP_SIZE];
if (ph->px == NULL)
{
// Create Kangaroos, if not already loaded
ph->px = new Int[CPU_GRP_SIZE];
ph->py = new Int[CPU_GRP_SIZE];
ph->distance = new Int[CPU_GRP_SIZE];
CreateHerd(CPU_GRP_SIZE, ph->px, ph->py, ph->distance, TAME);
}
if (keyIdx == 0)
::printf("SolveKeyCPU Thread %d: %d kangaroos\n", ph->threadId, CPU_GRP_SIZE);
ph->hasStarted = true;
// Using Affine coord
Int dy;
Int rx;
Int ry;
Int _s;
Int _p;
while (!endOfSearch)
{
// Random walk
for (int g = 0; g < CPU_GRP_SIZE; g++)
{
#ifdef USE_SYMMETRY
uint64_t jmp = ph->px[g].bits64[0] % (NB_JUMP / 2) + (NB_JUMP / 2) * ph->symClass[g];
#else
uint64_t jmp = ph->px[g].bits64[0] % NB_JUMP;
#endif
Int *p1x = &jumpPointx[jmp];
Int *p2x = &ph->px[g];
dx[g].ModSub(p2x, p1x);
}
grp->Set(dx);
grp->ModInv();
for (int g = 0; g < CPU_GRP_SIZE; g++)
{
#ifdef USE_SYMMETRY
uint64_t jmp = ph->px[g].bits64[0] % (NB_JUMP / 2) + (NB_JUMP / 2) * ph->symClass[g];
#else
uint64_t jmp = ph->px[g].bits64[0] % NB_JUMP;
#endif
Int *p1x = &jumpPointx[jmp];
Int *p1y = &jumpPointy[jmp];
Int *p2x = &ph->px[g];
Int *p2y = &ph->py[g];
dy.ModSub(p2y, p1y);
_s.ModMulK1(&dy, &dx[g]);
_p.ModSquareK1(&_s);
rx.ModSub(&_p, p1x);
rx.ModSub(p2x);
ry.ModSub(p2x, &rx);
ry.ModMulK1(&_s);
ry.ModSub(p2y);
ph->distance[g].ModAddK1order(&jumpDistance[jmp]);
#ifdef USE_SYMMETRY
// Equivalence symmetry class switch
if (ry.ModPositiveK1())
{
ph->distance[g].ModNegK1order();
ph->symClass[g] = !ph->symClass[g];
}
#endif
ph->px[g].Set(&rx);
ph->py[g].Set(&ry);
}
if (clientMode)
{
// Send DP to server
for (int g = 0; g < CPU_GRP_SIZE; g++)
{
if (IsDP(ph->px[g].bits64[3]))
{
ITEM it;
it.x.Set(&ph->px[g]);
it.d.Set(&ph->distance[g]);
it.kIdx = g;
dps.push_back(it);
}
}
double now = Timer::get_tick();
if (now - lastSent > SEND_PERIOD)
{
LOCK(ghMutex);
SendToServer(dps, ph->threadId, 0xFFFF);
UNLOCK(ghMutex);
lastSent = now;
}
if (!endOfSearch)
counters[thId] += CPU_GRP_SIZE;
}
else
{
// Add to table and collision check
for (int g = 0; g < CPU_GRP_SIZE && !endOfSearch; g++)
{
if (IsDP(ph->px[g].bits64[3]))
{
LOCK(ghMutex);
if (!endOfSearch)
{
if (!AddToTable(&ph->px[g], &ph->distance[g], g % 2))
{
// Collision inside the same herd
// We need to reset the kangaroo
CreateHerd(1, &ph->px[g], &ph->py[g], &ph->distance[g], g % 2, false);
collisionInSameHerd++;
}
}
UNLOCK(ghMutex);
}
if (!endOfSearch)
counters[thId]++;
}
}
// Save request
if (saveRequest && !endOfSearch)
{
ph->isWaiting = true;
LOCK(saveMutex);
ph->isWaiting = false;
UNLOCK(saveMutex);
}
}
// Free
delete grp;
delete[] dx;
safe_delete_array(ph->px);
safe_delete_array(ph->py);
safe_delete_array(ph->distance);
#ifdef USE_SYMMETRY
safe_delete_array(ph->symClass);
#endif
ph->isRunning = false;
}
// ----------------------------------------------------------------------------
void Kangaroo::SolveKeyGPU(TH_PARAM *ph)
{
double lastSent = 0;
// Global init
int thId = ph->threadId;
#ifdef WITHGPU
vector<ITEM> dps;
vector<ITEM> gpuFound;
GPUEngine *gpu;
gpu = new GPUEngine(ph->gridSizeX, ph->gridSizeY, ph->gpuId, 65536 * 2);
if (keyIdx == 0)
::printf("GPU: %s (%.1f MB used)\n", gpu->deviceName.c_str(), gpu->GetMemory() / 1048576.0);
double t0 = Timer::get_tick();
if (ph->px == NULL)
{
if (keyIdx == 0)
::printf("SolveKeyGPU Thread GPU#%d: creating kangaroos...\n", ph->gpuId);
// Create Kangaroos, if not already loaded
uint64_t nbThread = gpu->GetNbThread();
ph->px = new Int[ph->nbKangaroo];
ph->py = new Int[ph->nbKangaroo];
ph->distance = new Int[ph->nbKangaroo];
for (uint64_t i = 0; i < nbThread; i++)
{
CreateHerd(GPU_GRP_SIZE, &(ph->px[i * GPU_GRP_SIZE]),
&(ph->py[i * GPU_GRP_SIZE]),
&(ph->distance[i * GPU_GRP_SIZE]),
TAME);
}
}
#ifdef USE_SYMMETRY
gpu->SetWildOffset(&rangeWidthDiv4);
#else
gpu->SetWildOffset(&rangeWidthDiv2);
#endif
gpu->SetParams(dMask, jumpDistance, jumpPointx, jumpPointy);
gpu->SetKangaroos(ph->px, ph->py, ph->distance);
if (workFile.length() == 0 || !saveKangaroo)
{
// No need to get back kangaroo, free memory
safe_delete_array(ph->px);
safe_delete_array(ph->py);
safe_delete_array(ph->distance);
}
gpu->callKernel();
double t1 = Timer::get_tick();
if (keyIdx == 0)
::printf("SolveKeyGPU Thread GPU#%d: 2^%.2f kangaroos [%.1fs]\n", ph->gpuId, log2((double)ph->nbKangaroo), (t1 - t0));
ph->hasStarted = true;
while (!endOfSearch)
{
gpu->Launch(gpuFound);
counters[thId] += ph->nbKangaroo * NB_RUN;
if (clientMode)
{
for (int i = 0; i < (int)gpuFound.size(); i++)
dps.push_back(gpuFound[i]);
double now = Timer::get_tick();
if (now - lastSent > SEND_PERIOD)
{
LOCK(ghMutex);
SendToServer(dps, ph->threadId, ph->gpuId);
UNLOCK(ghMutex);
lastSent = now;
}
}
else
{
if (gpuFound.size() > 0)
{
LOCK(ghMutex);
for (int g = 0; !endOfSearch && g < gpuFound.size(); g++)
{
uint32_t kType = (uint32_t)(gpuFound[g].kIdx % 2);
if (!AddToTable(&gpuFound[g].x, &gpuFound[g].d, kType))
{
// Collision inside the same herd
// We need to reset the kangaroo
Int px;
Int py;
Int d;
CreateHerd(1, &px, &py, &d, kType, false);
gpu->SetKangaroo(gpuFound[g].kIdx, &px, &py, &d);
collisionInSameHerd++;
}
}
UNLOCK(ghMutex);
}
}
// Save request
if (saveRequest && !endOfSearch)
{
// Get kangaroos
if (saveKangaroo)
gpu->GetKangaroos(ph->px, ph->py, ph->distance);
ph->isWaiting = true;
LOCK(saveMutex);
ph->isWaiting = false;
UNLOCK(saveMutex);
}
}
safe_delete_array(ph->px);
safe_delete_array(ph->py);
safe_delete_array(ph->distance);
delete gpu;
#else
ph->hasStarted = true;
#endif
ph->isRunning = false;
}
// ----------------------------------------------------------------------------
#ifdef WIN64
DWORD WINAPI _SolveKeyCPU(LPVOID lpParam)
{
#else
void *_SolveKeyCPU(void *lpParam)
{
#endif
TH_PARAM *p = (TH_PARAM *)lpParam;
p->obj->SolveKeyCPU(p);
return 0;
}
#ifdef WIN64
DWORD WINAPI _SolveKeyGPU(LPVOID lpParam)
{
#else
void *_SolveKeyGPU(void *lpParam)
{
#endif
TH_PARAM *p = (TH_PARAM *)lpParam;
p->obj->SolveKeyGPU(p);
return 0;
}
// ----------------------------------------------------------------------------
void Kangaroo::CreateHerd(int nbKangaroo, Int *px, Int *py, Int *d, int firstType, bool lock)
{
vector<Int> pk;
vector<Point> S;
vector<Point> Sp;
pk.reserve(nbKangaroo);
S.reserve(nbKangaroo);
Sp.reserve(nbKangaroo);
Point Z;
Z.Clear();
// Choose random starting distance
if (lock)
LOCK(ghMutex);
for (uint64_t j = 0; j < nbKangaroo; j++)
{
#ifdef USE_SYMMETRY
// Tame in [0..N/2]
d[j].Rand(rangePower - 1);
if ((j + firstType) % 2 == WILD)
{
// Wild in [-N/4..N/4]
d[j].ModSubK1order(&rangeWidthDiv4);
}
#else
// Tame in [0..N]
d[j].Rand(rangePower);
if ((j + firstType) % 2 == WILD)
{
// Wild in [-N/2..N/2]
d[j].ModSubK1order(&rangeWidthDiv2);
}
#endif
pk.push_back(d[j]);
}
if (lock)
UNLOCK(ghMutex);
// Compute starting pos
S = secp->ComputePublicKeys(pk);
for (uint64_t j = 0; j < nbKangaroo; j++)
{
if ((j + firstType) % 2 == TAME)
{
Sp.push_back(Z);
}
else
{
Sp.push_back(keyToSearch);
}
}
S = secp->AddDirect(Sp, S);
for (uint64_t j = 0; j < nbKangaroo; j++)
{
px[j].Set(&S[j].x);
py[j].Set(&S[j].y);
#ifdef USE_SYMMETRY
// Equivalence symmetry class switch
if (py[j].ModPositiveK1())
d[j].ModNegK1order();
#endif
}
}
// ----------------------------------------------------------------------------
void Kangaroo::CreateJumpTable()
{
#ifdef USE_SYMMETRY
int jumpBit = rangePower / 2;
#else
int jumpBit = rangePower / 2 + 1;
#endif
if (jumpBit > 128)
jumpBit = 128;
int maxRetry = 100;
bool ok = false;
double distAvg;
double maxAvg = pow(2.0, (double)jumpBit - 0.95);
double minAvg = pow(2.0, (double)jumpBit - 1.05);
//::printf("Jump Avg distance min: 2^%.2f\n",log2(minAvg));
//::printf("Jump Avg distance max: 2^%.2f\n",log2(maxAvg));
// Kangaroo jumps
// Constant seed for compatibilty of workfiles
rseed(0x600DCAFE);
#ifdef USE_SYMMETRY
Int old;
old.Set(Int::GetFieldCharacteristic());
Int u;
Int v;
u.SetInt32(1);
u.ShiftL(jumpBit / 2);
u.AddOne();
while (!u.IsProbablePrime())
{
u.AddOne();
u.AddOne();
}
v.Set(&u);
v.AddOne();
v.AddOne();
while (!v.IsProbablePrime())
{
v.AddOne();
v.AddOne();
}
Int::SetupField(&old);
::printf("U= %s\n", u.GetBase16().c_str());
::printf("V= %s\n", v.GetBase16().c_str());
#endif
// Positive only
// When using symmetry, the sign is switched by the symmetry class switch
while (!ok && maxRetry > 0)
{
Int totalDist;
totalDist.SetInt32(0);
#ifdef USE_SYMMETRY
for (int i = 0; i < NB_JUMP / 2; ++i)
{
jumpDistance[i].Rand(jumpBit / 2);
jumpDistance[i].Mult(&u);
if (jumpDistance[i].IsZero())
jumpDistance[i].SetInt32(1);
totalDist.Add(&jumpDistance[i]);
}
for (int i = NB_JUMP / 2; i < NB_JUMP; ++i)
{
jumpDistance[i].Rand(jumpBit / 2);
jumpDistance[i].Mult(&v);
if (jumpDistance[i].IsZero())
jumpDistance[i].SetInt32(1);
totalDist.Add(&jumpDistance[i]);
}
#else
for (int i = 0; i < NB_JUMP; ++i)
{
jumpDistance[i].Rand(jumpBit);
if (jumpDistance[i].IsZero())
jumpDistance[i].SetInt32(1);
totalDist.Add(&jumpDistance[i]);
}
#endif
distAvg = totalDist.ToDouble() / (double)(NB_JUMP);
ok = distAvg > minAvg && distAvg < maxAvg;
maxRetry--;
}
for (int i = 0; i < NB_JUMP; ++i)
{
Point J = secp->ComputePublicKey(&jumpDistance[i]);
jumpPointx[i].Set(&J.x);
jumpPointy[i].Set(&J.y);
}
::printf("Jump Avg distance: 2^%.2f\n", log2(distAvg));
unsigned long seed = Timer::getSeed32();
rseed(seed);
}
// ----------------------------------------------------------------------------
void Kangaroo::ComputeExpected(double dp, double *op, double *ram, double *overHead)
{
// Compute expected number of operation and memory
#ifdef USE_SYMMETRY
double gainS = 1.0 / sqrt(2.0);
#else
double gainS = 1.0;
#endif
// Kangaroo number
double k = (double)totalRW;
// Range size
double N = pow(2.0, (double)rangePower);
// theta
double theta = pow(2.0, dp);
// Z0
double Z0 = (2.0 * (2.0 - sqrt(2.0)) * gainS) * sqrt(M_PI);
// Average for DP = 0
double avgDP0 = Z0 * sqrt(N);
// DP Overhead
*op = Z0 * pow(N * (k * theta + sqrt(N)), 1.0 / 3.0);
*ram = (double)sizeof(HASH_ENTRY) * (double)HASH_SIZE + // Table
(double)sizeof(ENTRY *) * (double)(HASH_SIZE * 4) + // Allocation overhead
(double)(sizeof(ENTRY) + sizeof(ENTRY *)) * (*op / theta); // Entries
*ram /= (1024.0 * 1024.0);
if (overHead)
*overHead = *op / avgDP0;
}
// ----------------------------------------------------------------------------
void Kangaroo::InitRange()
{
rangeWidth.Set(&rangeEnd);
rangeWidth.Sub(&rangeStart);
rangePower = rangeWidth.GetBitLength();
::printf("Range width: 2^%d\n", rangePower);
rangeWidthDiv2.Set(&rangeWidth);
rangeWidthDiv2.ShiftR(1);
rangeWidthDiv4.Set(&rangeWidthDiv2);
rangeWidthDiv4.ShiftR(1);
rangeWidthDiv8.Set(&rangeWidthDiv4);
rangeWidthDiv8.ShiftR(1);
}
void Kangaroo::InitSearchKey()
{
Int SP;
SP.Set(&rangeStart);
#ifdef USE_SYMMETRY
SP.ModAddK1order(&rangeWidthDiv2);
#endif
if (!SP.IsZero())
{
Point RS = secp->ComputePublicKey(&SP);
RS.y.ModNeg();
keyToSearch = secp->AddDirect(keysToSearch[keyIdx], RS);
}
else
{
keyToSearch = keysToSearch[keyIdx];
}
keyToSearchNeg = keyToSearch;
keyToSearchNeg.y.ModNeg();
}
// ----------------------------------------------------------------------------
void Kangaroo::Run(int nbThread, std::vector<int> gpuId, std::vector<int> gridSize)
{
double t0 = Timer::get_tick();
nbCPUThread = nbThread;
nbGPUThread = (useGpu ? (int)gpuId.size() : 0);
totalRW = 0;
#ifndef WITHGPU
if (nbGPUThread > 0)
{
::printf("GPU code not compiled, use -DWITHGPU when compiling.\n");
nbGPUThread = 0;
}
#endif