BOOL ALSZOTExtRec::receiver_routine(uint32_t id, uint64_t myNumOTs) {
uint64_t myStartPos = id * myNumOTs;
uint64_t wd_size_bits = m_nBlockSizeBits;
uint64_t internal_numOTs = std::min(myNumOTs + myStartPos, m_nOTs) - myStartPos;
uint64_t lim = myStartPos + internal_numOTs;
uint64_t processedOTBlocks = std::min(num_ot_blocks, ceil_divide(internal_numOTs, wd_size_bits));
uint64_t OTsPerIteration = processedOTBlocks * wd_size_bits;
uint64_t OTwindow = num_ot_blocks * wd_size_bits;
uint64_t** rndmat;
bool use_mat_chan = (m_eSndOTFlav == Snd_GC_OT || m_bUseMinEntCorRob);
uint32_t nchans = 2;
if(use_mat_chan) {
nchans = 3;
}
channel* ot_chan = new channel(OT_BASE_CHANNEL+nchans*id, m_cRcvThread, m_cSndThread);
channel* check_chan = new channel(OT_BASE_CHANNEL+nchans*id+1, m_cRcvThread, m_cSndThread);
channel* mat_chan;
if(use_mat_chan) {
mat_chan = new channel(nchans*id+2, m_cRcvThread, m_cSndThread);
}
// A temporary part of the T matrix
CBitVector T(wd_size_bits * OTsPerIteration);
// The send buffer
CBitVector vSnd(m_nBaseOTs * OTsPerIteration);
// A temporary buffer that stores the resulting seeds from the hash buffer
//TODO: Check for some maximum size
CBitVector seedbuf(OTwindow * m_cCrypt->get_aes_key_bytes() * 8);
uint64_t otid = myStartPos;
std::queue<alsz_rcv_check_t> check_buf;
std::queue<mask_block*> mask_queue;
CBitVector maskbuf;
maskbuf.Create(m_nBitLength * OTwindow);
//these two values are only required for the min entropy correlation robustness assumption
alsz_rcv_check_t check_tmp;
CBitVector Ttmp(wd_size_bits * OTsPerIteration);
OT_AES_KEY_CTX* tmp_base_keys;
uint64_t base_ot_block_ctr = otid / (myNumOTs);
//TODO only do when successfull checks
if(m_eSndOTFlav == Snd_GC_OT) {
initRndMatrix(&rndmat, m_nBitLength, m_nBaseOTs);
}
#ifdef OTTiming
double totalMtxTime = 0, totalTnsTime = 0, totalHshTime = 0, totalRcvTime = 0, totalSndTime = 0,
totalChkTime = 0, totalMaskTime = 0, totalEnqueueTime = 0, totalOutputSetTime = 0;
timespec tempStart, tempEnd;
#endif
while (otid < lim) {
processedOTBlocks = std::min(num_ot_blocks, ceil_divide(lim - otid, wd_size_bits));
OTsPerIteration = processedOTBlocks * wd_size_bits;
//nSize = bits_in_bytes(m_nBaseOTs * OTsPerIteration);
tmp_base_keys = m_tBaseOTKeys[base_ot_block_ctr];
//m_tBaseOTQ.pop();
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
BuildMatrices(&T, &vSnd, otid, processedOTBlocks, tmp_base_keys);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalMtxTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
check_buf.push(EnqueueSeed(T.GetArr(), vSnd.GetArr(), otid, processedOTBlocks));
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalEnqueueTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
MaskBaseOTs(&T, &vSnd, otid, processedOTBlocks);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalMaskTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
SendMasks(&vSnd, ot_chan, otid, OTsPerIteration);
//ot_chan->send_id_len(vSnd.GetArr(), nSize, otid, OTsPerIteration);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalSndTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
ReceiveAndFillMatrix(rndmat, mat_chan);
if(!m_bUseMinEntCorRob) {
T.Transpose(wd_size_bits, OTsPerIteration);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalTnsTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
HashValues(&T, &seedbuf, &maskbuf, otid, std::min(lim - otid, OTsPerIteration), rndmat);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalHshTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
}
if(check_chan->data_available()) {
if(m_bUseMinEntCorRob) {
check_tmp = check_buf.front();
Ttmp.Copy(check_tmp.T0, 0, check_tmp.numblocks * m_nBlockSizeBytes);
}
ComputeOWF(&check_buf, check_chan);
if(m_bUseMinEntCorRob) {
ReceiveAndXORCorRobVector(&Ttmp, check_tmp.numblocks * wd_size_bits, mat_chan);
Ttmp.Transpose(wd_size_bits, OTsPerIteration);
HashValues(&Ttmp, &seedbuf, &maskbuf, check_tmp.otid, std::min(lim - check_tmp.otid, check_tmp.numblocks * wd_size_bits), rndmat);
}
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalChkTime += getMillies(tempStart, tempEnd);
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
}
SetOutput(&maskbuf, otid, OTsPerIteration, &mask_queue, ot_chan);
otid += std::min(lim - otid, OTsPerIteration);
base_ot_block_ctr++;
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalOutputSetTime += getMillies(tempStart, tempEnd);
#endif
//free(tmp_base_keys);
//free(tmp_baseots);
vSnd.Reset();
T.Reset();
}
while(!check_buf.empty()) {
if(check_chan->data_available()) {
if(m_bUseMinEntCorRob) {
check_tmp = check_buf.front();
Ttmp.Copy(check_tmp.T0, 0, check_tmp.numblocks * m_nBlockSizeBytes);
}
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
ComputeOWF(&check_buf, check_chan);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalChkTime += getMillies(tempStart, tempEnd);
#endif
if(m_bUseMinEntCorRob) {
ReceiveAndXORCorRobVector(&Ttmp, check_tmp.numblocks * wd_size_bits, mat_chan);
Ttmp.Transpose(wd_size_bits, OTsPerIteration);
HashValues(&Ttmp, &seedbuf, &maskbuf, check_tmp.otid, std::min(lim - check_tmp.otid, check_tmp.numblocks * wd_size_bits), rndmat);
}
}
}
if(m_eSndOTFlav != Snd_R_OT) {
//finevent->Wait();
#ifdef ABY_OT
while(!(mask_queue.empty())) {
#else
while(ot_chan->is_alive() && !(mask_queue.empty())) {
#endif
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempStart);
#endif
ReceiveAndUnMask(ot_chan, &mask_queue);
#ifdef OTTiming
clock_gettime(CLOCK_MONOTONIC, &tempEnd);
totalOutputSetTime += getMillies(tempStart, tempEnd);
#endif
}
}
ot_chan->synchronize_end();
check_chan->synchronize_end();
delete ot_chan;
delete check_chan;
T.delCBitVector();
vSnd.delCBitVector();
seedbuf.delCBitVector();
maskbuf.delCBitVector();
Ttmp.delCBitVector();
if(use_mat_chan) {
mat_chan->synchronize_end();
delete mat_chan;
}
if(m_eSndOTFlav==Snd_GC_OT) {
freeRndMatrix(rndmat, m_nBaseOTs);
}
#ifdef OTTiming
std::cout << "Receiver time benchmark for performing " << internal_numOTs << " OTs on " << m_nBitLength << " bit strings" << std::endl;
std::cout << "Time needed for: " << std::endl;
std::cout << "\t Matrix Generation:\t" << totalMtxTime << " ms" << std::endl;
std::cout << "\t Enqueuing Seeds:\t" << totalEnqueueTime << " ms" << std::endl;
std::cout << "\t Base OT Masking:\t" << totalMaskTime << " ms" << std::endl;
std::cout << "\t Sending Matrix:\t" << totalSndTime << " ms" << std::endl;
std::cout << "\t Transposing Matrix:\t" << totalTnsTime << " ms" << std::endl;
std::cout << "\t Hashing Matrix:\t" << totalHshTime << " ms" << std::endl;
std::cout << "\t Receiving Values:\t" << totalRcvTime << " ms" << std::endl;
std::cout << "\t Checking OWF: \t" << totalChkTime << " ms" << std::endl;
std::cout << "\t Setting Output:\t" << totalOutputSetTime << " ms" << std::endl;
#endif
return TRUE;
}
void ALSZOTExtRec::ReceiveAndFillMatrix(uint64_t** rndmat, channel* mat_chan) {
if(m_eSndOTFlav == Snd_GC_OT) {
uint8_t* rnd_seed = mat_chan->blocking_receive();
//initRndMatrix(&rndmat, m_nBitLength, m_nBaseOTs);
fillRndMatrix(rnd_seed, rndmat, m_nBitLength, m_nBaseOTs, m_cCrypt);
free(rnd_seed);
}
}
alsz_rcv_check_t ALSZOTExtRec::EnqueueSeed(uint8_t* T0, uint8_t* T1, uint64_t otid, uint64_t numblocks) {
uint64_t expseedbytelen = m_nBaseOTs * numblocks * m_nBlockSizeBytes;
alsz_rcv_check_t seedstr;
seedstr.otid = otid;
seedstr.numblocks = numblocks;
seedstr.T0 = (uint8_t*) malloc(expseedbytelen);
seedstr.T1 = (uint8_t*) malloc(expseedbytelen);
memcpy(seedstr.T0, T0, expseedbytelen);
memcpy(seedstr.T1, T1, expseedbytelen);
return seedstr;
}
BOOL NNOBOTExtRec::receiver_routine(uint32_t id, uint64_t myNumOTs) {
uint64_t myStartPos = id * myNumOTs;
uint64_t wd_size_bits = m_nBlockSizeBits;
myNumOTs = min(myNumOTs + myStartPos, m_nOTs) - myStartPos;
uint64_t lim = myStartPos + myNumOTs;
uint64_t processedOTBlocks = min((uint64_t) NUMOTBLOCKS, ceil_divide(myNumOTs, wd_size_bits));
uint64_t OTsPerIteration = processedOTBlocks * wd_size_bits;
uint64_t OTwindow = NUMOTBLOCKS * wd_size_bits;
uint64_t** rndmat;
bool use_mat_chan = (m_eSndOTFlav == Snd_GC_OT || m_bUseMinEntCorRob);
uint32_t nchans = 2;
if(use_mat_chan) {
nchans = 3;
}
channel* ot_chan = new channel(nchans*id, m_cRcvThread, m_cSndThread);
channel* check_chan = new channel(nchans*id+1, m_cRcvThread, m_cSndThread);
channel* mat_chan;
if(use_mat_chan) {
mat_chan = new channel(nchans*id+2, m_cRcvThread, m_cSndThread);
}
//counter variables
uint64_t numblocks = ceil_divide(myNumOTs, OTsPerIteration);
// A temporary part of the T matrix
CBitVector T(wd_size_bits * OTsPerIteration);
// The send buffer
CBitVector vSnd(m_nBaseOTs * OTsPerIteration);
// A temporary buffer that stores the resulting seeds from the hash buffer
//TODO: Check for some maximum size
CBitVector seedbuf(OTwindow * m_cCrypt->get_aes_key_bytes() * 8);
uint64_t otid = myStartPos;
queue<nnob_rcv_check_t> check_buf;
queue<mask_block*> mask_queue;
CBitVector maskbuf;
maskbuf.Create(m_nBitLength * OTwindow);
//TODO only do when successfull checks
if(m_eSndOTFlav == Snd_GC_OT) {
initRndMatrix(&rndmat, m_nBitLength, m_nBaseOTs);
}
#ifdef OTTiming
double totalMtxTime = 0, totalTnsTime = 0, totalHshTime = 0, totalRcvTime = 0, totalSndTime = 0,
totalChkTime = 0, totalMaskTime = 0, totalEnqueueTime = 0;
timeval tempStart, tempEnd;
#endif
while (otid < lim) {
processedOTBlocks = min((uint64_t) NUMOTBLOCKS, ceil_divide(lim - otid, wd_size_bits));
OTsPerIteration = processedOTBlocks * wd_size_bits;
//nSize = bits_in_bytes(m_nBaseOTs * OTsPerIteration);
#ifdef OTTiming
gettimeofday(&tempStart, NULL);
#endif
BuildMatrices(T, vSnd, otid, processedOTBlocks);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalMtxTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
check_buf.push(EnqueueSeed(T.GetArr(), otid, processedOTBlocks));
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalEnqueueTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
MaskBaseOTs(T, vSnd, otid, processedOTBlocks);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalMaskTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
SendMasks(vSnd, ot_chan, otid, OTsPerIteration);
//ot_chan->send_id_len(vSnd.GetArr(), nSize, otid, OTsPerIteration);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalSndTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
ReceiveAndFillMatrix(rndmat, mat_chan);
ReceiveAndXORCorRobVector(T, OTsPerIteration, mat_chan);
T.Transpose(wd_size_bits, OTsPerIteration);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalTnsTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
HashValues(&T, &seedbuf, &maskbuf, otid, min(lim - otid, OTsPerIteration), rndmat);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalHshTime += getMillies(tempStart, tempEnd);
gettimeofday(&tempStart, NULL);
#endif
if(check_chan->data_available()) {
ComputeOWF(&check_buf, check_chan);
}
//if(ot_chan->data_available()) {
// ReceiveAndUnMask(ot_chan);
//}
SetOutput(&maskbuf, otid, OTsPerIteration, &mask_queue, ot_chan);
otid += min(lim - otid, OTsPerIteration);
#ifdef OTTiming
gettimeofday(&tempEnd, NULL);
totalRcvTime += getMillies(tempStart, tempEnd);
#endif
vSnd.Reset();
T.Reset();
}
while(!check_buf.empty()) {
if(check_chan->data_available()) {
ComputeOWF(&check_buf, check_chan);
}
}
if(m_eSndOTFlav != Snd_R_OT) {
//finevent->Wait();
while(ot_chan->is_alive() && !(mask_queue.empty()))
ReceiveAndUnMask(ot_chan, &mask_queue);
}
ot_chan->synchronize_end();
check_chan->synchronize_end();
T.delCBitVector();
vSnd.delCBitVector();
seedbuf.delCBitVector();
maskbuf.delCBitVector();
if(use_mat_chan) {
mat_chan->synchronize_end();
}
if(m_eSndOTFlav==Snd_GC_OT) {
freeRndMatrix(rndmat, m_nBaseOTs);
}
#ifdef OTTiming
cout << "Receiver time benchmark for performing " << myNumOTs << " OTs on " << m_nBitLength << " bit strings" << endl;
cout << "Time needed for: " << endl;
cout << "\t Matrix Generation:\t" << totalMtxTime << " ms" << endl;
cout << "\t Enqueuing Seeds:\t" << totalEnqueueTime << " ms" << endl;
cout << "\t Base OT Masking:\t" << totalMaskTime << " ms" << endl;
cout << "\t Sending Matrix:\t" << totalSndTime << " ms" << endl;
cout << "\t Transposing Matrix:\t" << totalTnsTime << " ms" << endl;
cout << "\t Hashing Matrix:\t" << totalHshTime << " ms" << endl;
cout << "\t Receiving Values:\t" << totalRcvTime << " ms" << endl;
#endif
return TRUE;
}
