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Defines.cpp
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Defines.cpp
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#include "Common/Defines.h"
#include "Crypto/Commit.h"
#include "Common/BitVector.h"
//#include "Common/Timer.h"
#include <boost/math/special_functions/binomial.hpp>
#include <boost/multiprecision/cpp_bin_float.hpp>
namespace bOPRF {
Timer gTimer;
const block ZeroBlock = _mm_set_epi64x(0, 0);
const block OneBlock = _mm_set_epi64x(0, 1);
const block AllOneBlock = _mm_set_epi64x(u64(-1), u64(-1));
const block CCBlock = ([]() {block cc; memset(&cc, 0xcc, sizeof(block)); return cc; })();
std::ostream& operator<<(std::ostream& out, const block& blk)
{
out << std::hex;
u64* data = (u64*)&blk;
out << std::setw(16) << std::setfill('0') << data[0]
<< std::setw(16) << std::setfill('0') << data[1];
out << std::dec << std::setw(0);
return out;
}
std::ostream& operator<<(std::ostream& out, const blockBop& blk)
{
out << std::hex;
u64* data = (u64*)&blk;
out << std::setw(16) << std::setfill('0') << data[0] << "..."
//<< std::setw(16) << std::setfill('0') << data[1]
//<< std::setw(16) << std::setfill('0') << data[2]
//<< std::setw(16) << std::setfill('0') << data[3]
//<< std::setw(16) << std::setfill('0') << data[4]
//<< std::setw(16) << std::setfill('0') << data[5]
<< std::setw(16) << std::setfill('0') << data[6];
out << std::dec << std::setw(0);
return out;
}
std::ostream* gOut = &std::cout;
std::ostream& operator<<(std::ostream& out, const Commit& comm)
{
out << std::hex;
u32* data = (u32*)comm.data();
out << std::setw(8) << std::setfill('0') << data[0]
<< std::setw(8) << std::setfill('0') << data[1]
<< std::setw(8) << std::setfill('0') << data[2]
<< std::setw(8) << std::setfill('0') << data[3]
<< std::setw(8) << std::setfill('0') << data[4];
out << std::dec << std::setw(0);
return out;
}
block PRF(const block& b, u64 i)
{
//TODO("REMOVE THIS!!");
//return b;
block ret, tweak = _mm_set1_epi64x(i), enc;
ret = b ^ tweak;
mAesFixedKey.ecbEncBlock(ret, enc);
ret = ret ^ enc; // H( a0 )
return ret;
}
void split(const std::string &s, char delim, std::vector<std::string> &elems) {
std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, delim)) {
elems.push_back(item);
}
}
std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
split(s, delim, elems);
return elems;
}
const int tab64[64] = {
63, 0, 58, 1, 59, 47, 53, 2,
60, 39, 48, 27, 54, 33, 42, 3,
61, 51, 37, 40, 49, 18, 28, 20,
55, 30, 34, 11, 43, 14, 22, 4,
62, 57, 46, 52, 38, 26, 32, 41,
50, 36, 17, 19, 29, 10, 13, 21,
56, 45, 25, 31, 35, 16, 9, 12,
44, 24, 15, 8, 23, 7, 6, 5 };
u64 log2floor(u64 value)
{
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
value |= value >> 8;
value |= value >> 16;
value |= value >> 32;
return tab64[((uint64_t)((value - (value >> 1)) * 0x07EDD5E59A4E28C2)) >> 58];
}
u64 log2ceil(u64 value)
{
return u64(std::ceil(std::log2(value)));
}
u64 get_stash_size(u64 neles) {
if (neles >= (1 << 24))
return 2;
if (neles >= (1 << 20))
return 3;
if (neles >= (1 << 16))
return 4;
if (neles >= (1 << 12))
return 6;
if (neles >= (1 << 8))
return 12;
return 12; //other
throw std::runtime_error("get_stash_size: rt error at " LOCATION);
}
//template<unsigned int N = 16>
double getBinOverflowProb(u64 numBins, u64 numBalls, u64 binSize, double epsilon = 0.0001)
{
if (numBalls <= binSize)
return std::numeric_limits<double>::max();
if (numBalls > unsigned(-1))
{
auto msg = ("boost::math::binomial_coefficient(...) only supports " + std::to_string(sizeof(unsigned) * 8) + " bit inputs which was exceeded." LOCATION);
std::cout << msg << std::endl;
throw std::runtime_error(msg);
}
//try
//{
//std::cout << numBalls << " " << numBins << " " << binSize << std::endl;
typedef boost::multiprecision::number<boost::multiprecision::backends::cpp_bin_float<16>> T;
T sum = 0.0;
T sec = 0.0;// minSec + 1;
T diff = 1;
u64 i = binSize + 1;
while (diff > T(epsilon) && numBalls >= i /*&& sec > minSec*/)
{
sum += numBins * boost::math::binomial_coefficient<T>(numBalls, i)
* boost::multiprecision::pow(T(1.0) / numBins, i) * boost::multiprecision::pow(1 - T(1.0) / numBins, numBalls - i);
//std::cout << "sum[" << i << "] " << sum << std::endl;
T sec2 = boost::multiprecision::log2(sum);
diff = boost::multiprecision::abs(sec - sec2);
//std::cout << diff << std::endl;
sec = sec2;
i++;
}
return std::max<double>(0, (double)-sec);
//}
//catch (std::exception& e)
//{
// if (N == 16)
// {
// std::cout << "percision failure at " << LOCATION << "\n tring again with high percision (performance penalty)" << std::endl;
// // try again with higher percition
// return getBinOverflowProb<128>(numBins, numBalls, binSize);
// }
//
// std::cout << "retry percision failure at " << LOCATION << "\n" << e.what() << std::endl;
// throw;
//}
}
u64 get_bin_size(u64 numBins, u64 numBalls, u64 statSecParam)
{
auto B = std::max<u64>(1, numBalls / numBins);
double currentProb = 0;
u64 step = 1;
bool doubling = true;
while (currentProb < statSecParam || step > 1)
{
if (!step)
throw std::runtime_error(LOCATION);
if (statSecParam > currentProb)
{
if (doubling) step = std::max<u64>(1, step * 2);
else step = std::max<u64>(1, step / 2);
B += step;
}
else
{
doubling = false;
step = std::max<u64>(1, step / 2);
B -= step;
}
currentProb = getBinOverflowProb(numBins, numBalls, B);
}
return B;
//if (simpleSize <= cuckooSize)
//{
// if (simpleSize >= (1 << 24))
// return 28;
// if (simpleSize >= (1 << 20))
// return 27;
// if (simpleSize >= (1 << 16))
// return 26;
// if (simpleSize >= (1 << 12))
// return 25;
// if (simpleSize >= (1 << 8))
// return 24;
// //return 30; //other
//}
//else
//{
// return simpleSize / cuckooSize + 16 + 4 * std::sqrt(simpleSize * std::log2(cuckooSize) / cuckooSize);
//}
//throw std::runtime_error("get_bin_size: rt error at " LOCATION);
}
u64 get_codeword_size(u64 neles) {
if (neles >= (1 << 24))
return 448 / 8; // in byte
if (neles >= (1 << 20))
return 448 / 8;
if (neles >= (1 << 16))
return 440 / 8;
if (neles >= (1 << 12))
return 432 / 8;
if (neles >= (1 << 8))
return 424 / 8;
return 424 / 8;
//throw std::runtime_error("get_codeword_size: rt error at " LOCATION);
}
u64 get_mask_size(u64 neles, u64 othersize, u64 statSecParam) {
return (statSecParam + log2(neles * othersize) + 7 ) / 8;
//if (neles >= (1 << 24))
// return 88 / 8; // in byte
//if (neles >= (1 << 20))
// return 80 / 8;
//if (neles >= (1 << 16))
// return 72 / 8;
//if (neles >= (1 << 12))
// return 64 / 8;
//if (neles >= (1 << 8))
// return 56 / 8;
//return 56 / 8;
////return (40 + 2 * log(neles)) / 8;
// throw std::runtime_error("get_codeword_size: rt error at " LOCATION);
}
}