Method initializeBasePoints

CLKeySearchDevice/CLKeySearchDevice.cpp:487–522

}

void CLKeySearchDevice::initializeBasePoints()
{
    // generate a table of points G, 2G, 4G, 8G...(2^255)G
    std::vector<secp256k1::ecpoint> table;

    table.push_back(secp256k1::G());
    for(uint64_t i = 1; i < 256; i++) {

        secp256k1::ecpoint p = doublePoint(table[i - 1]);
        if(!pointExists(p)) {
            throw std::string("Point does not exist!");
        }
        table.push_back(p);
    }

    size_t count = 256;

    unsigned int *tmpX = new unsigned int[count * 8];
    unsigned int *tmpY = new unsigned int[count * 8];

    for(int i = 0; i < 256; i++) {
        unsigned int bufX[8];
        unsigned int bufY[8];
        table[i].x.exportWords(bufX, 8, secp256k1::uint256::BigEndian);
        table[i].y.exportWords(bufY, 8, secp256k1::uint256::BigEndian);

        for(int j = 0; j < 8; j++) {
            tmpX[i * 8 + j] = bufX[j];
            tmpY[i * 8 + j] = bufY[j];
        }
    }

    _clContext->copyHostToDevice(tmpX, _xTable, count * 8 * sizeof(unsigned int));

    _clContext->copyHostToDevice(tmpY, _yTable, count * 8 * sizeof(unsigned int));
}