//Initialize and start numThreads OTSenderThread
BOOL OTExtSnd::start_send(uint32_t numThreads) {
if (m_nOTs == 0)
return true;
if(numThreads * m_nBlockSizeBits > m_nOTs && numThreads > 1) {
cerr << "Decreasing nthreads from " << numThreads << " to " << max(m_nOTs / m_nBlockSizeBits, (uint64_t) 1) << " to fit window size" << endl;
numThreads = max(m_nOTs / m_nBlockSizeBits, (uint64_t) 1);
}
//The total number of OTs that is performed has to be a multiple of numThreads*Z_REGISTER_BITS
uint32_t wd_size_bits = m_nBlockSizeBits;//pad_to_power_of_two(m_nBaseOTs);//1 << (ceil_log2(m_nBaseOTs));
//uint64_t numOTs = ceil_divide(PadToMultiple(m_nOTs, wd_size_bits), numThreads);
uint64_t internal_numOTs = PadToMultiple(ceil_divide(m_nOTs, numThreads), wd_size_bits);
vector<OTSenderThread*> sThreads(numThreads);
for (uint32_t i = 0; i < numThreads; i++) {
sThreads[i] = new OTSenderThread(i, internal_numOTs, this);
sThreads[i]->Start();
}
for (uint32_t i = 0; i < numThreads; i++) {
sThreads[i]->Wait();
}
m_nCounter += m_nOTs;
for (uint32_t i = 0; i < numThreads; i++) {
delete sThreads[i];
}
#ifdef VERIFY_OT
verifyOT(m_nOTs);
#endif
return true;
}
void KKOTExtSnd::KKHashValues(CBitVector &Q, CBitVector *seedbuf,
CBitVector *snd_buf, uint64_t OT_ptr,
uint64_t OT_len, uint64_t **mat_mul) {
uint64_t numhashiters =
ceil_divide(m_nBitLength, m_cCrypt->get_hash_bytes());
uint32_t rowbytelen = bits_in_bytes(m_nBaseOTs);
uint32_t hashinbytelen = rowbytelen + sizeof(uint64_t);
uint32_t hashoutbitlen = ceil_log2(m_nSndVals);
uint64_t wd_size_bytes =
m_nBlockSizeBytes; // 1 << (ceil_log2(m_nBaseOTs) - 3);
uint32_t u;
uint32_t aes_key_bytes = m_cCrypt->get_aes_key_bytes();
uint32_t choicebitlen = ceil_log2(m_nSndVals);
uint64_t *Qptr = (uint64_t *)Q.GetArr();
uint8_t **sbp = (uint8_t **)malloc(sizeof(uint8_t *) * m_nSndVals);
uint8_t *inbuf = (uint8_t *)calloc(hashinbytelen, 1);
uint8_t *resbuf = (uint8_t *)calloc(m_cCrypt->get_hash_bytes(), 1);
uint8_t *hash_buf = (uint8_t *)calloc(m_cCrypt->get_hash_bytes(), 1);
uint64_t *tmpbuf = (uint64_t *)calloc(
PadToMultiple(bits_in_bytes(m_nBitLength), sizeof(uint64_t)), 1);
uint8_t *tmpbufb = (uint8_t *)calloc(bits_in_bytes(m_nBitLength), 1);
uint64_t global_OT_ptr = OT_ptr + m_nCounter;
CBitVector mask(m_nCodeWordBits);
for (u = 0; u < m_nSndVals; u++) {
sbp[u] = seedbuf[u].GetArr();
}
for (uint64_t i = 0; i < OT_len; global_OT_ptr++, i++, Qptr += 2) {
for (u = 0; u < m_nSndVals; u++) {
mask.Copy(m_vU, 0, rowbytelen);
mask.ANDBytes((uint8_t *)m_vCodeWords[u], 0, rowbytelen);
mask.XORBytes(Q.GetArr() + i * rowbytelen, rowbytelen);
#ifdef DEBUG_OT_HASH_IN
cout << "Hash-In for i = " << global_OT_ptr << ", u = " << u << ": "
<< (hex);
for (uint32_t p = 0; p < rowbytelen; p++)
cout << setw(2) << setfill('0') << (uint32_t)mask.GetArr()[p];
cout << (dec) << endl;
// cout << "Using codeword " << (hex) << m_vCodeWords[u][0] <<
// m_vCodeWords[u][1] << (hex) << m_vCodeWords[u][2] << m_vCodeWords[u][3] <<
// (dec) << endl;
#endif
if (m_eSndOTFlav != Snd_GC_OT) {
#ifdef FIXED_KEY_AES_HASHING
FixedKeyHashing(m_kCRFKey, sbp[u], (BYTE *)Qptr, hash_buf, i,
hashinbytelen, m_cCrypt);
#else
memcpy(inbuf, &global_OT_ptr, sizeof(uint64_t));
// memcpy(inbuf+sizeof(uint64_t), Q.GetArr() + i *
// wd_size_bytes, rowbytelen);
memcpy(inbuf + sizeof(uint64_t), mask.GetArr(), rowbytelen);
m_cCrypt->hash_buf(resbuf, aes_key_bytes, inbuf, hashinbytelen,
hash_buf);
memcpy(sbp[u], resbuf, aes_key_bytes);
// snd_buf[u].SetBits(resbuf, i * hashoutbitlen, hashoutbitlen);
} else {
// TODO: mecr has not been tested with KK-OT!!
BitMatrixMultiplication(tmpbufb, bits_in_bytes(hashoutbitlen),
mask.GetArr(), m_nBaseOTs, mat_mul,
tmpbuf);
// BitMatrixMultiplication(tmpbufb, bits_in_bytes(m_nBitLength),
// Q.GetArr() + i * wd_size_bytes, m_nBaseOTs, mat_mul, tmpbuf);
// m_vValues[u].SetBits(tmpbufb, (OT_ptr + i)* m_nBitLength,
// m_nBitLength);
snd_buf[u].SetBits(tmpbufb, i * hashoutbitlen, hashoutbitlen);
// m_vTempOTMasks.SetBytes(tmpbufb, (uint64_t) (OT_ptr + i) *
// aes_key_bytes, (uint64_t) aes_key_bytes);
// m_vValues[u].SetBytes(Q.GetArr() + i * wd_size_bytes, (OT_ptr
// + i)* wd_size_bytes, rowbytelen);
}
#endif
#ifdef DEBUG_OT_HASH_OUT
cout << "Hash-Out for i = " << global_OT_ptr << ", u = " << u
<< ": " << (hex);
for (uint32_t p = 0; p < aes_key_bytes; p++)
cout << setw(2) << setfill('0') << (uint32_t)sbp[u][p];
cout << (dec) << endl;
#endif
sbp[u] += m_cCrypt->get_aes_key_bytes();
}
}
// TODO: difference is in here!! (could be solved by giving the
// bit-length as parameter in the function call)
for (uint32_t u = 0; u < m_nSndVals; u++) {
m_fMaskFct->expandMask(&snd_buf[u], seedbuf[u].GetArr(), 0, OT_len,
m_nBitLength * choicebitlen, m_cCrypt);
// cout << "Mask " << u << ": ";
// snd_buf[u].PrintHex();
}
// m_vValues[0].PrintHex();
// m_vValues[1].PrintHex();
free(resbuf);
free(inbuf);
free(sbp);
free(hash_buf);
free(tmpbuf);
free(tmpbufb);
}
void OTExtSnd::HashValues(CBitVector& Q, CBitVector* seedbuf, CBitVector* snd_buf, uint64_t OT_ptr, uint64_t OT_len, uint64_t** mat_mul) {
uint64_t numhashiters = ceil_divide(m_nBitLength, m_cCrypt->get_hash_bytes());
uint32_t rowbytelen = bits_in_bytes(m_nBaseOTs);
uint32_t hashinbytelen = rowbytelen + sizeof(uint64_t);
uint64_t wd_size_bytes = m_nBlockSizeBytes;//1 << (ceil_log2(m_nBaseOTs) - 3);
uint32_t u;
uint32_t aes_key_bytes = m_cCrypt->get_aes_key_bytes();
uint64_t* Qptr = (uint64_t*) Q.GetArr();
uint64_t* Uptr = (uint64_t*) m_vU.GetArr();
uint8_t** sbp = (uint8_t**) malloc(sizeof(uint8_t*) * m_nSndVals);
uint8_t* inbuf = (uint8_t*) calloc(hashinbytelen, 1);
uint8_t* resbuf = (uint8_t*) calloc(m_cCrypt->get_hash_bytes(), 1);
uint8_t* hash_buf = (uint8_t*) calloc(m_cCrypt->get_hash_bytes(), 1);
uint64_t* tmpbuf = (uint64_t*) calloc(PadToMultiple(bits_in_bytes(m_nBitLength), sizeof(uint64_t)), 1);
uint8_t* tmpbufb = (uint8_t*) calloc(bits_in_bytes(m_nBitLength), 1);
uint64_t global_OT_ptr = OT_ptr + m_nCounter;
for (u = 0; u < m_nSndVals; u++)
sbp[u] = seedbuf[u].GetArr();
for (uint64_t i = 0; i < OT_len; global_OT_ptr++, i++, Qptr += 2) {
for (u = 0; u < m_nSndVals; u++) {
#ifdef HIGH_SPEED_ROT_LT
if(u == 1) {
Qptr[0]^=Uptr[0];
Qptr[1]^=Uptr[1];
}
#else
if (u == 1)
Q.XORBytes((uint8_t*) Uptr, i * wd_size_bytes, rowbytelen);
#endif
#ifdef DEBUG_OT_HASH_IN
cout << "Hash-In for i = " << global_OT_ptr << ", u = " << u << ": " << (hex);
for(uint32_t p = 0; p < rowbytelen; p++)
cout << setw(2) << setfill('0') << (uint32_t) (Q.GetArr() + i * wd_size_bytes)[p];
cout << (dec) << endl;
#endif
if(m_eSndOTFlav != Snd_GC_OT) {
#ifdef FIXED_KEY_AES_HASHING
FixedKeyHashing(m_kCRFKey, sbp[u], (BYTE*) Qptr, hash_buf, i, hashinbytelen, m_cCrypt);
#else
memcpy(inbuf, &global_OT_ptr, sizeof(uint64_t));
memcpy(inbuf+sizeof(uint64_t), Q.GetArr() + i * wd_size_bytes, rowbytelen);
m_cCrypt->hash_buf(resbuf, aes_key_bytes, inbuf, hashinbytelen, hash_buf);
memcpy(sbp[u], resbuf, aes_key_bytes);
} else {
BitMatrixMultiplication(tmpbufb, bits_in_bytes(m_nBitLength), Q.GetArr() + i * wd_size_bytes, m_nBaseOTs, mat_mul, tmpbuf);
//m_vValues[u].SetBits(tmpbufb, (OT_ptr + i)* m_nBitLength, m_nBitLength);
snd_buf[u].SetBits(tmpbufb, i * m_nBitLength, m_nBitLength);
//m_vTempOTMasks.SetBytes(tmpbufb, (uint64_t) (OT_ptr + i) * aes_key_bytes, (uint64_t) aes_key_bytes);
//m_vValues[u].SetBytes(Q.GetArr() + i * wd_size_bytes, (OT_ptr + i)* wd_size_bytes, rowbytelen);
}
#endif
#ifdef DEBUG_OT_HASH_OUT
cout << "Hash-Out for i = " << global_OT_ptr << ", u = " << u << ": " << (hex);
for(uint32_t p = 0; p < aes_key_bytes; p++)
cout << setw(2) << setfill('0') << (uint32_t) sbp[u][p];
cout << (dec) << endl;
#endif
sbp[u] += aes_key_bytes;
}
}
//m_vValues[0].PrintHex();
//m_vValues[1].PrintHex();
#ifndef HIGH_SPEED_ROT_LT
if(m_eSndOTFlav != Snd_GC_OT) {
//Two calls to expandMask, both writing into snd_buf
for (uint32_t u = 0; u < m_nSndVals; u++)
m_fMaskFct->expandMask(snd_buf[u], seedbuf[u].GetArr(), 0, OT_len, m_nBitLength, m_cCrypt);
}
#endif
free(resbuf);
free(inbuf);
free(sbp);
free(hash_buf);
free(tmpbuf);
free(tmpbufb);
}