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7
Makefile
View File

@ -57,7 +57,7 @@ OBJECTS_MIRACL=${MIRACL_LIB_DIR}/*.o
MIRACL_LIB=${EXT}/miracl_lib/miracl.a
all: miracl core bench demo
all: miracl core bench demo cuckoo
@echo "make all done."
@ -72,6 +72,9 @@ bench:
demo:
${CC} -o demo.exe ${SRC}/mains/psi_demo.cpp ${OBJECTS_DHPSI} ${OBJECTS_OTPSI} ${OBJECTS_NAIVE} ${OBJECTS_SERVERAIDED} ${OBJECTS_UTIL} ${OBJECTS_HASHING} ${OBJECTS_CRYPTO} ${OBJECTS_OT} ${OBJECTS_MIRACL} ${CFLAGS} ${DEBUG_OPTIONS} ${LIBRARIES} ${MIRACL_LIB} ${INCLUDE} ${COMPILER_OPTIONS}
cuckoo:
${CC} -o cuckoo.exe ${SRC}/mains/cuckoo_analysis.cpp ${OBJECTS_UTIL} ${OBJECTS_HASHING} ${OBJECTS_CRYPTO} ${OBJECTS_MIRACL} ${CFLAGS} ${DEBUG_OPTIONS} ${LIBRARIES} ${MIRACL_LIB} ${INCLUDE} ${COMPILER_OPTIONS}
# this will create a copy of the files in ${SOURCES_MIRACL} and its sub-directories and put them into ${MIRACL_LIB_DIR} without sub-directories, then compile it
miracl: ${MIRACL_LIB_DIR}/miracl.a
@ -83,7 +86,7 @@ ${MIRACL_LIB_DIR}/miracl.a: ${SOURCES_MIRACL}
# only clean example objects, test object and binaries
clean:
rm -f ${OBJECTS_EXAMPLE} ${OBJECTS_TEST} *.exe ${OBJECTS_DHPSI} ${OBJECTS_OTPSI} ${OBJECTS_NAIVE} ${OBJECTS_SERVERAIDED} ${OBJECTS_UTIL} ${OBJECTS_CRYPTO} ${OBJECTS_OT}
rm -f ${OBJECTS_EXAMPLE} ${OBJECTS_TEST} *.exe ${OBJECTS_DHPSI} ${OBJECTS_OTPSI} ${OBJECTS_HASHING} ${OBJECTS_CRYPTO} ${OBJECTS_NAIVE} ${OBJECTS_SERVERAIDED} ${OBJECTS_UTIL} ${OBJECTS_CRYPTO} ${OBJECTS_OT}
# this will clean everything: example objects, test object and binaries and the Miracl library
cleanall: clean

2
sample_sets/emails_bob.txt
View File

@ -1,7 +1,7 @@
Michael.Zohner@ec-spride.de
Wolfram.Hipp@yahoo.co.jp
Carl.Zitzmann@facebook.com
Tilmann.Wittke@neuf.fr
Michael.Zohner@ec-spride.de
Leila.Thiele@love.com
Andres.Wölfle@o2.co.uk
Semra.Kranz@live.com.ar

106
src/hashing/cuckoo.cpp
View File

@ -8,12 +8,21 @@
#include "cuckoo.h"
//returns a cuckoo hash table with the first dimension being the bins and the second dimension being the pointer to the elements
uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_t bitlen, uint32_t *outbitlen, uint32_t* nelesinbin,
#ifndef TEST_UTILIZATION
uint8_t*
#else
uint32_t
#endif
cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_t bitlen, uint32_t *outbitlen, uint32_t* nelesinbin,
uint32_t* perm, uint32_t ntasks, prf_state_ctx* prf_state)
{
//The resulting hash table
uint8_t* hash_table;
#ifdef DOUBLE_TABLE
cuckoo_entry_ctx*** cuckoo_table;
#else
cuckoo_entry_ctx** cuckoo_table;
#endif
cuckoo_entry_ctx* cuckoo_entries;
uint32_t i, j;
uint32_t *perm_ptr;
@ -28,12 +37,18 @@ uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint3
init_hashing_state(&hs, neles, bitlen, nbins, prf_state);
*outbitlen = hs.outbitlen;
#ifdef DOUBLE_TABLE
cuckoo_table = (cuckoo_entry_ctx***) calloc(2, sizeof(cuckoo_entry_ctx**));
cuckoo_table[0] = (cuckoo_entry_ctx**) calloc(nbins, sizeof(cuckoo_entry_ctx*));
cuckoo_table[1] = (cuckoo_entry_ctx**) calloc(nbins, sizeof(cuckoo_entry_ctx*));
#else
cuckoo_table = (cuckoo_entry_ctx**) calloc(nbins, sizeof(cuckoo_entry_ctx*));
#endif
cuckoo_entries = (cuckoo_entry_ctx*) malloc(neles * sizeof(cuckoo_entry_ctx));
entry_gen_tasks = (pthread_t*) malloc(sizeof(pthread_t) * ntasks);
ctx = (cuckoo_entry_gen_ctx*) malloc(sizeof(cuckoo_entry_gen_ctx) * ntasks);
#ifndef TEST_UTILIZATION
for(i = 0; i < ntasks; i++) {
ctx[i].elements = elements;
ctx[i].cuckoo_entries = cuckoo_entries;
@ -53,13 +68,20 @@ uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint3
exit(0);
}
}
#else
ctx[0].elements = elements;
ctx[0].cuckoo_entries = cuckoo_entries;
ctx[0].hs = &hs;
ctx[0].startpos = 0;
ctx[0].endpos = neles;
gen_cuckoo_entries(ctx);
#endif
//for(i = 0; i < nbins; i++) {
// cout << "Address " << i << " mapped to " << hs.address_used[i] << " times" << endl;
//}
//insert all elements into the cuckoo hash table
for(i = 0; i < neles; i++) {
if(!(insert_element(cuckoo_table, cuckoo_entries + i))) {
if(!(insert_element(cuckoo_table, cuckoo_entries + i, neles))) {
#ifdef COUNT_FAILS
fails++;
/*cout << "insertion failed for element " << (hex) << (*(((uint32_t*) elements)+i)) << ", inserting to address: ";
@ -68,19 +90,16 @@ uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint3
}
cout << (dec) << endl;*/
#else
//cerr << "Insertion not successful for element " <<i <<"!" << endl;
//exit(0);
cerr << "Insertion not successful for element " <<i <<"!" << endl;
exit(0);
#endif
}
}
#ifdef COUNT_FAILS
if(fails > 0)
cout << "insertion performed with " << fails << " fails" << endl;
#endif
//Copy the final state of the cuckoo table into the hash table
perm_ptr = perm;
#ifndef TEST_UTILIZATION
hash_table = (uint8_t*) calloc(nbins, hs.outbytelen);
for(i = 0; i < nbins; i++) {
@ -96,22 +115,32 @@ uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint3
}
}
//Cleanup
#endif
#ifndef TEST_UTILIZATION
//Cleanup
for(i = 0; i < neles; i++) {
//for(j = 0; j < NUM_HASH_FUNCTIONS; j++) {
free(cuckoo_entries[i].val);
//}
free(cuckoo_entries[i].val);
}
#endif
free(cuckoo_entries);
#ifdef DOUBLE_TABLE
free(cuckoo_table[0]);
free(cuckoo_table[1]);
#else
free(cuckoo_table);
#endif
free(entry_gen_tasks);
free(ctx);
free_hashing_state(&hs);
#ifdef TEST_UTILIZATION
return fails;
#else
return hash_table;
#endif
}
@ -135,15 +164,17 @@ inline void gen_cuckoo_entry(uint8_t* in, cuckoo_entry_ctx* out, hs_t* hs, uint3
out->pos = 0;
out->eleid = ele_id;
//for(i = 0; i < NUM_HASH_FUNCTIONS; i++) {
#ifndef TEST_UTILIZATION
out->val = (uint8_t*) malloc(hs->outbytelen);
#endif
hashElement(in, out->address, out->val, hs);
//}
hashElement(in, out->address, out->val, hs);
}
inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element) {
#ifdef DOUBLE_TABLE
inline bool insert_element(cuckoo_entry_ctx*** ctable, cuckoo_entry_ctx* element, uint32_t max_iterations) {
#else
inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element, uint32_t max_iterations) {
#endif
cuckoo_entry_ctx *evicted, *tmp_evicted;
uint32_t i, ev_pos, iter_cnt;
#ifdef DEBUG_CUCKOO
@ -151,21 +182,40 @@ inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element)
<< element->address[element->pos] << " or " << element->address[element->pos^1] << endl;
#endif
for(iter_cnt = 0, evicted = element; iter_cnt < MAX_ITERATIONS; iter_cnt++) {
for(iter_cnt = 0, evicted = element; iter_cnt < max_iterations; iter_cnt++) {
//TODO: assert(addr < MAX_TAB_ENTRIES)
for(i = 0; i < NUM_HASH_FUNCTIONS; i++) {//, ele_pos=(ele_pos+1)%NUM_HASH_FUNCTIONS) {
if(ctable[evicted->address[i]] == NULL) {
ctable[evicted->address[i]] = evicted;
#ifdef DOUBLE_TABLE
if(ctable[i][evicted->address[i]] == NULL) {
ctable[i][evicted->address[i]] = evicted;
evicted->pos = i;
return true;
}
#else
if(ctable[evicted->address[i]] == NULL) {
ctable[evicted->address[i]] = evicted;
evicted->pos = i;
#ifdef TEST_CHAINLEN
chain_cnt[iter_cnt]++;
#endif
return true;
}
#endif
}
//choose random bin to evict other element
#if NUM_HASH_FUNCTIONS == 2
ev_pos = evicted->address[evicted->pos% NUM_HASH_FUNCTIONS];
#else
ev_pos = evicted->address[(evicted->pos^iter_cnt) % NUM_HASH_FUNCTIONS];
#endif
#ifdef DOUBLE_TABLE
tmp_evicted = ctable[evicted->pos][ev_pos];
ctable[evicted->pos][ev_pos] = evicted;
#else
tmp_evicted = ctable[ev_pos];
ctable[ev_pos] = evicted;
#endif
evicted = tmp_evicted;
//change position - if the number of HF's is increased beyond 2 this should be replaced by a different strategy
@ -175,3 +225,13 @@ inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element)
//the highest number of iterations has been reached
return false;
}
#ifdef TEST_CHAINLEN
void print_chain_cnt() {
//cout << "Chain Count: " << endl;
for(uint32_t i = 0; i < MAX_ITERATIONS; i++) {
//if(chain_cnt[i] > 0)
cout << i << "\t" << chain_cnt[i] << endl;
}
}
#endif

26
src/hashing/cuckoo.h
View File

@ -10,10 +10,18 @@
#include "hashing_util.h"
#define MAX_ITERATIONS 1000
#define MAX_ITERATIONS 1024
//#define DEBUG_CUCKOO
//#define COUNT_FAILS
#ifdef TEST_UTILIZATION
#define COUNT_FAILS
#endif
//#define DOUBLE_TABLE
//#define TEST_CHAINLEN
#ifdef TEST_CHAINLEN
static uint64_t chain_cnt[MAX_ITERATIONS];
void print_chain_cnt();
#endif
struct cuckoo_entry_ctx {
//id of the element in the source set
@ -30,6 +38,7 @@ struct cuckoo_entry_ctx {
};
struct cuckoo_entry_gen_ctx {
//starting position in the generation process
uint32_t startpos;
@ -48,12 +57,21 @@ struct cuckoo_entry_gen_ctx {
//returns a cuckoo hash table with the first dimension being the bins and the second dimension being the pointer to the elements
uint8_t* cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_t bitlen, uint32_t* outbitlen, uint32_t* nelesinbin,
#ifndef TEST_UTILIZATION
uint8_t*
#else
uint32_t
#endif
cuckoo_hashing(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_t bitlen, uint32_t* outbitlen, uint32_t* nelesinbin,
uint32_t* perm, uint32_t ntasks, prf_state_ctx* prf_state);
//routine for generating the entries, is invoked by the threads
void *gen_cuckoo_entries(void *ctx);
inline void gen_cuckoo_entry(uint8_t* in, cuckoo_entry_ctx* out, hs_t* hs, uint32_t ele_id);
inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element);
#ifdef DOUBLE_TABLE
inline bool insert_element(cuckoo_entry_ctx*** ctable, cuckoo_entry_ctx* element, uint32_t max_iterations);
#else
inline bool insert_element(cuckoo_entry_ctx** ctable, cuckoo_entry_ctx* element, uint32_t max_iterations);
#endif

19
src/hashing/hashing_util.h
View File

@ -13,13 +13,14 @@
typedef uint16_t TABLEID_T;
#define NUM_HASH_FUNCTIONS 2
//#define TEST_UTILIZATION
//#define NUM_HASH_FUNCTIONS 2
#define NUM_HASH_FUNCTIONS 3
#define MAX_TABLE_SIZE_BYTES sizeof(TABLEID_T)
#define DUMMY_ENTRY_SERVER 0x00
#define DUMMY_ENTRY_CLIENT 0xFF
#define USE_LUBY_RACKOFF
//#define TEST_UTILIZATION
typedef struct hashing_state_ctx {
uint32_t** hf_values[NUM_HASH_FUNCTIONS];
@ -103,9 +104,15 @@ static void init_hashing_state(hs_t* hs, uint32_t nelements, uint32_t inbitlen,
}
static void free_hashing_state(hs_t* hs) {
uint32_t i;
for(i = 0; i < NUM_HASH_FUNCTIONS; i++)
uint32_t i, j;
for(i = 0; i < NUM_HASH_FUNCTIONS; i++) {
for(j = 0; j < hs->nhfvals; j++) {
free(hs->hf_values[i][j]);
}
free(hs->hf_values[i]);
}
free(hs->address_used);
//free(hs->hf_values);
}
//reduce the bit-length of the elements if some bits are used to determine the bin and a permutation is used for hashing
@ -151,17 +158,19 @@ inline void hashElement(uint8_t* element, uint32_t* address, uint8_t* val, hs_t*
//cout << "i = " << i << ", j = " << j << ", Hfmaskaddr = " << hfmaskaddr << endl;
//cout << "Hfvalue: " << hs->hf_values[i][j][hfmaskaddr] << endl;
address[i] = (L ^ *((hs->hf_values[i][j]+hfmaskaddr))) % hs->nbins;
//address[i] = (L ^ (i * R)) % hs->nbins;
}
//cout << address[i] << ", ";
//hs->address_used[address[i]]++;
}
//cout << endl;
#ifndef TEST_UTILIZATION
*((uint32_t*) val) = R;
//TODO copy remaining bits
if(hs->outbytelen >= sizeof(uint32_t))
memcpy(val + (sizeof(uint32_t) - hs->addrbytelen), element + sizeof(uint32_t), hs->outbytelen - sizeof(uint32_t));
#endif
//cout << "Address for hfid = " << hfid << ": " << *address << ", L = " << L << ", R = " << R << endl;
#else

182
src/ot-based/ot-psi.cpp
View File

@ -7,80 +7,6 @@
#include "ot-psi.h"
/*int32_t main(int32_t argc, char** argv) {
uint32_t pid, nelements=10, elebytelen=4, symsecbits=80,
intersect_size, i, ntasks=1, runs=1, j;
int32_t nargs=8;
uint8_t *elements, *intersection;
const char* address;
uint16_t port;
timeval begin, end;
//CSocket* sockfd = (CSocket*) malloc(sizeof(CSocket) * ntasks);
vector<CSocket> sockfd(ntasks);
role_type role = (role_type) 0;
double epsilon=1.2;
if(argc < nargs) {
print_ot_psi_usage();
}
pid = atoi(argv[1]);
nelements = atoi(argv[2]);
elebytelen = atoi(argv[3]);
symsecbits = atoi(argv[4]);
address = argv[5];
port = (uint16_t) atoi(argv[6]);
epsilon = atof(argv[7]);
ntasks=atoi(argv[8]);
if(pid == 0) {
role = SERVER;
listen(address, port, sockfd.data(), ntasks);
} else {
role = CLIENT;
for(i = 0; i < ntasks; i++)
connect(address, port, sockfd[i]);
}
crypto crypto(symsecbits);//, const_ot_psi_seed);
elements = (uint8_t*) calloc(nelements * elebytelen, sizeof(uint8_t));
#ifdef SET_INPUT_ELEMENTS
for(i = 0; i < nelements; i++) {
//for(j = 0; j < elebytelen; j++)
elements[i*elebytelen] = i;
}
#endif
#ifdef PRINT_INPUT_ELEMENTS
for(i = 0; i < nelements; i++) {
cout << "Element " << i << ": " << (hex);
for(j = 0; j < elebytelen; j++)
cout << (unsigned int) elements[i*elebytelen + j];
cout << (dec) << endl;
}
#endif
gettimeofday(&begin, NULL);
for(i = 0; i < runs; i++) {
crypto.gen_rnd(elements, elebytelen * nelements);
intersect_size = otpsi(nelements, elebytelen*8, elements, &intersection, &crypto, sockfd.data(), role, ntasks, epsilon);
}
gettimeofday(&end, NULL);
cout << "Computing the intersection took " << getMillies(begin, end) << " ms" << endl;
#ifdef PRINT_INTERSECTION
cout << "Intersecting elements" << endl;
for(i = 0; i < intersect_size; i++) {
for(j = 0; j < elebytelen; j++) {
cout << (hex) << (uint32_t) intersection[i * elebytelen + j] << (dec);
}
cout << endl;
}
#endif
return 0;
}*/
uint32_t otpsi(role_type role, uint32_t neles, uint32_t pneles, uint32_t* elebytelens, uint8_t** elements,
uint8_t*** result, uint32_t** res_bytelen, crypto* crypt_env, CSocket* sock, uint32_t ntasks, double epsilon,
@ -126,15 +52,16 @@ uint32_t otpsi(role_type role, uint32_t neles, uint32_t pneles, uint32_t* elebyt
intersect_size = otpsi_client(eleptr, neles, nbins, pneles, internal_bitlen, maskbitlen, crypt_env,
sock, ntasks, &prf_state, &res_pos);
std::sort(res_pos, res_pos+intersect_size);
//std::sort(res_pos, res_pos+intersect_size);
*result = (uint8_t**) malloc(intersect_size * sizeof(uint8_t*));
*res_bytelen = (uint32_t*) malloc(intersect_size * sizeof(uint32_t));
for(i = 0; i < intersect_size; i++) {
//*result = (uint8_t**) malloc(intersect_size * sizeof(uint8_t*));
//*res_bytelen = (uint32_t*) malloc(intersect_size * sizeof(uint32_t));
/*for(i = 0; i < intersect_size; i++) {
(*res_bytelen)[i] = elebytelens[res_pos[i]];
(*result)[i] = (uint8_t*) malloc((*res_bytelen)[i]);
memcpy((*result)[i], elements[res_pos[i]], (*res_bytelen)[i]);
}
}*/
create_result_from_matches_var_bitlen(result, res_bytelen, elebytelens, elements, res_pos, intersect_size);
}
free(eleptr);
@ -173,7 +100,6 @@ uint32_t otpsi(role_type role, uint32_t neles, uint32_t pneles, uint32_t elebitl
internal_bitlen = elebitlen;
}
crypt_env->gen_common_seed(&prf_state, sock[0]);
if(role == SERVER) {
@ -223,8 +149,14 @@ uint32_t otpsi_client(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_
if(DETAILED_TIMINGS) {
gettimeofday(&t_start, NULL);
}
#ifndef TEST_UTILIZATION
hash_table = cuckoo_hashing(elements, neles, nbins, elebitlen, &outbitlen,
nelesinbin, perm, ntasks, prf_state);
#else
cerr << "Test utilization is active, PSI protocol will not be working correctly!" << endl;
cuckoo_hashing(elements, neles, nbins, elebitlen, &outbitlen,
nelesinbin, perm, ntasks, prf_state);
#endif
if(DETAILED_TIMINGS) {
gettimeofday(&t_end, NULL);
cout << "Time for Cuckoo hashing:\t" << fixed << std::setprecision(2) <<
@ -238,6 +170,7 @@ uint32_t otpsi_client(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_
gettimeofday(&t_start, NULL);
#endif
#ifdef PRINT_BIN_CONTENT
cout << "Client bin content: " << endl;
print_bin_content(hash_table, nbins, ceil_divide(outbitlen, 8), NULL, false);
#endif
@ -248,12 +181,22 @@ uint32_t otpsi_client(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_
if(DETAILED_TIMINGS) {
gettimeofday(&t_start, NULL);
}
/*uint64_t tmpmask = 0;
for(uint32_t i = 0; i < neles-1; i++) {
memcpy((uint8_t*) &tmpmask, masks + i*maskbytelen, maskbytelen);
cout << "Mask " << i << " : " << (hex) << tmpmask << (dec) << endl; //"intersection found at position " << tmpval[0] << " for key " << tmpbuf[0] << endl;
}*/
#ifdef TIMING
gettimeofday(&t_end, NULL);
cout << "Client: time for OPRG evaluation: " << getMillies(t_start, t_end) << " ms" << endl;
gettimeofday(&t_start, NULL);
#endif
/*#ifdef PRINT_BIN_CONTENT
cout << "Client masks: " << endl;
print_bin_content(masks, neles, maskbytelen, NULL, false);
#endif*/
//receive server masks
server_masks = (uint8_t*) malloc(NUM_HASH_FUNCTIONS * pneles * maskbytelen);
@ -289,7 +232,7 @@ uint32_t otpsi_client(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_
#endif
#ifdef PRINT_RECEIVED_VALUES
cout << "Received server masks: " << endl;
print_bin_content(server_masks, NUM_HASH_FUNCTIONS*neles, maskbytelen, NULL, false);
print_bin_content(server_masks, NUM_HASH_FUNCTIONS*pneles, maskbytelen, NULL, false);
#endif
//query hash table using multiple threads
@ -315,7 +258,7 @@ uint32_t otpsi_client(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_
//compute intersection
intersect_size = otpsi_find_intersection(result, masks, neles, server_masks,
neles * NUM_HASH_FUNCTIONS, maskbytelen, perm);
pneles * NUM_HASH_FUNCTIONS, maskbytelen, perm);
if(DETAILED_TIMINGS) {
gettimeofday(&t_end, NULL);
@ -397,19 +340,6 @@ void otpsi_server(uint8_t* elements, uint32_t neles, uint32_t nbins, uint32_t pn
free(nelesinbin);
}
void print_ot_psi_usage() {
cout << "Usage: ./otpsi [0 (server)/1 (client)] [num_elements] [element_byte_length] "
<< "[sym_security_bits] [server_ip] [server_port] [CH_epsilon] [nthreads]" << endl;
cout << "Program exiting" << endl;
exit(0);
}
void oprg_client(uint8_t* hash_table, uint32_t nbins, uint32_t neles, uint32_t* nelesinbin, uint32_t elebitlen,
uint32_t maskbitlen, crypto* crypt, CSocket* sock, uint32_t nthreads, uint8_t* res_buf) {
CBitVector choices;
@ -477,10 +407,16 @@ void oprg_client(uint8_t* hash_table, uint32_t nbins, uint32_t neles, uint32_t*
#ifdef PRINT_OPRG_MASKS
for(i = 0, ctr=0; i < nbins; i++) {
if(nelesinbin[i] > 0) {
cout << "Result for element i = " << i << " and choice = " << (hex) <<
choices.Get<uint64_t>(i * OTsPerElement*8, OTsPerElement*8) << (dec) << ": ";
cout << "Result for element i = " << i << " and choice = ";// << (hex) <<
for(uint32_t j = 0; j < OTsPerElement; j++) {
//cout << (hex) << (uint32_t) hash_table[j + i * OTsPerElement] << (dec);
cout << setw(2) << setfill('0') << (hex) << (uint32_t) choices.GetByte(j + i * OTsPerElement) << (dec);
}
cout << ": ";
//choices.Get<uint64_t>(i * OTsPerElement*8, OTsPerElement*8) << (dec) << ": ";
for(uint32_t j = 0; j < maskbytelen; j++) {
cout << (hex) << (uint32_t) res_buf[ctr * maskbytelen + j] << (dec);
cout << setw(2) << setfill('0') << (hex) << (uint32_t) res_buf[ctr * maskbytelen + j] << (dec);
}
cout << endl;
ctr++;
@ -493,6 +429,19 @@ void oprg_client(uint8_t* hash_table, uint32_t nbins, uint32_t neles, uint32_t*
evaluate_crf(res_buf, res_buf, neles, maskbytelen, crypt);
#ifdef PRINT_CRF_EVAL
for(i = 0, ctr=0; i < nbins; i++) {
if(nelesinbin[i] > 0) {
cout << "CRF Result for element i = " << i << ": ";
for(uint32_t j = 0; j < maskbytelen; j++) {
cout << setw(2) << setfill('0') << (hex) << (uint32_t) res_buf[ctr * maskbytelen + j] << (dec);
}
cout << endl;
ctr++;
}
}
#endif
if(DETAILED_TIMINGS) {
gettimeofday(&t_end, NULL);
cout << "Time for CRF evaluation:\t" << fixed << std::setprecision(2) <<
@ -510,14 +459,14 @@ void oprg_server(uint8_t* hash_table, uint32_t nbins, uint32_t totaleles, uint32
CBitVector input, results;
CBitVector baseOTchoices;
uint8_t* keySeeds;
uint32_t numOTs, OTsPerElement, i, maskbytelen;
uint32_t numOTs, OTsPerBin, i, maskbytelen;
OTExtension1ooNECCSender* sender;
timeval t_start, t_end;
maskbytelen = maskbitlen / 8;
OTsPerElement = ceil_divide(elebitlen, 8);
numOTs = nbins * OTsPerElement;
OTsPerBin = ceil_divide(elebitlen, 8);
numOTs = nbins * OTsPerBin;
#ifndef BATCH
cout << "Server: bins = " << nbins << ", elebitlen = " << elebitlen << " and maskbitlen = " <<
@ -570,9 +519,13 @@ void oprg_server(uint8_t* hash_table, uint32_t nbins, uint32_t totaleles, uint32
#ifdef PRINT_OPRG_MASKS
for(i = 0; i < totaleles; i++) {
cout << "Result for element i = " << i << ": ";
cout << "Result for element i = " << i << " ";
for(uint32_t j = 0; j < OTsPerBin; j++) {
cout << setw(2) << setfill('0') << (hex) << (uint32_t) hash_table[i * OTsPerBin + j] << (dec);
}
cout << ": ";
for(uint32_t j = 0; j < maskbytelen; j++) {
cout << (hex) << (uint32_t) res_buf[i * maskbytelen + j] << (dec);
cout << setw(2) << setfill('0') << (hex) << (uint32_t) res_buf[i * maskbytelen + j] << (dec);
}
cout << endl;
}
@ -583,6 +536,16 @@ void oprg_server(uint8_t* hash_table, uint32_t nbins, uint32_t totaleles, uint32
//evaluate correlation robust function on the elements
evaluate_crf(res_buf, res_buf, totaleles, maskbytelen, crypt);
#ifdef PRINT_CRF_EVAL
for(i = 0; i < totaleles; i++) {
cout << "Result for element i = " << i << ": ";
for(uint32_t j = 0; j < maskbytelen; j++) {
cout << setw(2) << setfill('0') << (hex) << (uint32_t) res_buf[i * maskbytelen + j] << (dec);
}
cout << endl;
}
#endif
if(DETAILED_TIMINGS) {
gettimeofday(&t_end, NULL);
cout << "Time for CRF evaluation:\t" << fixed << std::setprecision(2) <<
@ -732,11 +695,16 @@ void *otpsi_query_hash_table(void* ctx_tmp) {//GHashTable *map, uint8_t* element
//TODO if this works correctly, combine with other find intersection methods and outsource to hashing_util.h
uint32_t otpsi_find_intersection(uint32_t** result, uint8_t* my_hashes,
uint32_t my_neles, uint8_t* pa_hashes, uint32_t pa_neles, uint32_t hashbytelen, uint32_t* perm) {
uint32_t keys_stored;
uint32_t* matches = (uint32_t*) malloc(sizeof(uint32_t) * my_neles);
uint32_t* tmpval;
uint64_t tmpbuf;
uint32_t* tmpkeys;
uint32_t* invperm = (uint32_t*) malloc(sizeof(uint32_t) * my_neles);
for(uint32_t i = 0; i < my_neles; i++)
invperm[perm[i]] = i;
uint32_t size_intersect, i, intersect_ctr, tmp_hashbytelen;
@ -782,6 +750,7 @@ uint32_t otpsi_find_intersection(uint32_t** result, uint8_t* my_hashes,
}
} else {
matches[intersect_ctr] = tmpval[0];
//cout << "intersection found at position " << tmpval[0] << " for key " << (hex) << tmpbuf << (dec) << endl;
if(intersect_ctr<my_neles)
intersect_ctr++;
//cout << "Match found at " << tmpval[0] << " for i = " << i << endl;
@ -807,6 +776,7 @@ uint32_t otpsi_find_intersection(uint32_t** result, uint8_t* my_hashes,
free(matches);
free(map);
free(invperm);
return size_intersect;
}
@ -815,9 +785,7 @@ void evaluate_crf(uint8_t* result, uint8_t* masks, uint32_t nelements, uint32_t
AES_KEY_CTX aes_key;
crypt->init_aes_key(&aes_key, 128, (uint8_t*) const_seed);
for(i = 0; i < nelements; i++) {
//cout << "Input: " << ((uint64_t*)masks)[0] << endl;
crypt->fixed_key_aes_hash(&aes_key, result+i*elebytelen, elebytelen, masks+i*elebytelen, elebytelen);
//cout << "Input: " << ((uint64_t*)masks)[0] << endl;
}
}
@ -830,7 +798,7 @@ void print_bin_content(uint8_t* hash_table, uint32_t nbins, uint32_t elebytelen,
cout << "(" << nelesinbin[i] << ") Bin " << i << ": ";
for(j = 0; j < nelesinbin[i]; j++) {
for(k = 0; k < elebytelen; k++, ctr++) {
cout << (hex) << (unsigned int) hash_table[ctr] << (dec);
cout << setw(2) << setfill('0') << (hex) << (unsigned int) hash_table[ctr] << (dec);
}
cout << " ";
}
@ -840,7 +808,7 @@ void print_bin_content(uint8_t* hash_table, uint32_t nbins, uint32_t elebytelen,
for(i = 0, ctr = 0; i < nbins; i++) {
cout << "Bin " << i << ": ";
for(k = 0; k < elebytelen; k++, ctr++) {
cout << (hex) << (unsigned int) hash_table[ctr] << (dec);
cout << setw(2) << setfill('0') << (hex) << (unsigned int) hash_table[ctr] << (dec);
}
cout << endl;
}

4
src/ot-based/ot-psi.h
View File

@ -20,6 +20,7 @@
#include "../util/ot/opemasking.h"
#include <algorithm>
#include <glib.h>
#include "../util/helpers.h"
static bool DETAILED_TIMINGS=0;
@ -27,6 +28,7 @@ static bool DETAILED_TIMINGS=0;
//#define PRINT_BIN_CONTENT
//#define PRINT_OPRG_MASKS
//#define PRINT_RECEIVED_VALUES
//#define PRINT_CRF_EVAL
struct mask_rcv_ctx {
uint8_t* rcv_buf;
@ -76,8 +78,6 @@ void *receive_masks(void *ctx_tmp);
void InitOTReceiver(uint8_t* keyMtx, CSocket sock, crypto* crypt);
void InitOTSender(uint8_t* keySeeds, CBitVector& choices, CSocket sock, crypto* crypt);
void print_ot_psi_usage();
GHashTable* otpsi_create_hash_table(uint32_t elebytelen, uint8_t* hashes, uint32_t neles, uint32_t
hashbytelen, uint32_t* perm);
void *otpsi_query_hash_table(void* ctx_tmp);

4
src/util/crypto/crypto.cpp
View File

@ -110,7 +110,7 @@ void crypto::gen_rnd(uint8_t* resbuf, uint32_t nbytes) {
free(tmpbuf);*/
}
void crypto::gen_rnd_uniform(uint8_t* resbuf, uint64_t mod) {
void crypto::gen_rnd_uniform(uint8_t* res, uint64_t mod) {
//pad to multiple of 4 bytes for uint32_t length
uint32_t nrndbytes = pad_to_multiple(ceil_divide(secparam.symbits, 8) + ceil_log2(mod), sizeof(uint32_t));
uint64_t bitsint = (8*sizeof(uint32_t));
@ -215,7 +215,7 @@ void crypto::hash_ctr(uint8_t* resbuf, uint32_t noutbytes, uint8_t* inbuf, uint3
uint8_t* tmpbuf = (uint8_t*) malloc(ninbytes + sizeof(uint32_t));
memcpy(tmpbuf, &ctr, sizeof(uint32_t));
memcpy(tmpbuf + sizeof(uint32_t), inbuf, ninbytes);
hash_routine(resbuf, noutbytes, inbuf, ninbytes, sha_hash_buf);
hash_routine(resbuf, noutbytes, tmpbuf, ninbytes+sizeof(uint32_t), sha_hash_buf);
free(tmpbuf);
}

3
src/util/crypto/crypto.h
View File

@ -88,11 +88,12 @@ public:
uint32_t get_hash_bytes();
void gen_common_seed(prf_state_ctx* aes_key, CSocket& sock);
void init_prf_state(prf_state_ctx* prf_state, uint8_t* seed);
private:
void seed_aes_key(AES_KEY_CTX* aeskey, uint8_t* seed, bc_mode mode=ECB, const uint8_t* iv=ZERO_IV, bool encrypt=true);
void seed_aes_key(AES_KEY_CTX* aeskey, uint32_t symseclvl, uint8_t* seed, bc_mode mode=ECB, const uint8_t* iv=ZERO_IV, bool encrypt=true);
void init(uint32_t symsecbits, uint8_t* seed);
void init_prf_state(prf_state_ctx* prf_state, uint8_t* seed);
void free_prf_state(prf_state_ctx* prf_state);
AES_KEY_CTX aes_hash_key;

42
src/util/ot/opemasking.h
View File

@ -31,15 +31,16 @@ public:
assert(nbins > 0);
m_vStartingPosForBin[0] = 0;
m_nExpansionFactor = 1;
if(m_vNumEleInBin[0] > m_nCodeWordBits) {
m_nExpansionFactor = m_nCodeWordBits;
}
for(uint32_t i = 1; i < nbins; i++) {
m_vStartingPosForBin[i] = m_vStartingPosForBin[i-1] + m_vNumEleInBin[i-1];
if(m_vNumEleInBin[i] > m_nCodeWordBits) {
m_nExpansionFactor = m_nCodeWordBits;
}
}
if(m_vNumEleInBin[0] > m_nCodeWordBits) {
m_nExpansionFactor = m_nCodeWordBits;
}
};
//Constructor that is called by the client
@ -78,11 +79,13 @@ public:
//Expansion routine for the server
void ServerExpand(CBitVector& matrix, uint8_t* uptr, uint32_t ot_begin_id, uint32_t processedOTs) {
uint64_t ot_id, bin_id, bit_id, u, binoffset;
uint32_t hashinbytes = m_nCodeWordBytes + sizeof(uint64_t);
uint8_t *Mptr = matrix.GetArr();
CBitVector mask(m_nCodeWordBits * m_nExpansionFactor);
uint8_t* hash_buf = (uint8_t*) malloc(m_nCodeWordBytes * m_nExpansionFactor);
uint8_t* mask_ptr = mask.GetArr();
uint8_t* mask_ptr;
uint8_t* hash_ptr;
uint8_t* tmpbuf = (uint8_t*) malloc(hashinbytes);
//m_vServerChoices.PrintHex();
for(ot_id = ot_begin_id; ot_id < ot_begin_id+processedOTs; ot_id++, Mptr+=m_nCodeWordBytes)
@ -92,6 +95,8 @@ public:
binoffset = m_vStartingPosForBin[bin_id] * m_nOTsPerElement;
mask_ptr = mask.GetArr();
if(m_vNumEleInBin[bin_id] < m_nCodeWordBits) {
//cout << "Choice for ot_id = " << ot_id << ": ";
for(u = 0; u < m_vNumEleInBin[bin_id]; u++)
@ -111,7 +116,10 @@ public:
((uint64_t*) mask_ptr)[0] ^= ot_id;
m_cCrypto->aes_compression_hash(m_kCRFKey, hash_buf, mask_ptr, m_nCodeWordBytes);
#else
m_cCrypto->hash_ctr(hash_buf, AES_BYTES, mask_ptr, m_nCodeWordBytes, ot_id);
memcpy(tmpbuf, (uint8_t*) &ot_id, sizeof(uint64_t));
memcpy(tmpbuf+sizeof(uint64_t), mask_ptr, m_nCodeWordBytes);
m_cCrypto->hash(hash_buf, AES_BYTES, tmpbuf, hashinbytes);
//m_cCrypto->hash_ctr(hash_buf, AES_BYTES, mask_ptr, m_nCodeWordBytes, ot_id);
#endif
// cout << "MaskBitLen: " << m_nMaskBitLen << ", results size = " << m_vResults[bin_id].GetSize() << endl;
//cout << "(" << (hex) << ((uint64_t*) hash_buf)[0] << ") " << (dec);
@ -137,7 +145,16 @@ public:
((uint32_t*) mask_ptr)[0] ^= ot_id;
m_cCrypto->aes_compression_hash(m_kCRFKey, hash_ptr, mask_ptr, m_nCodeWordBytes);
#else
m_cCrypto->hash_ctr(hash_buf, AES_BYTES, mask_ptr, m_nCodeWordBytes, ot_id);
memcpy(tmpbuf, (uint8_t*) &ot_id, sizeof(uint64_t));
memcpy(tmpbuf+sizeof(uint64_t), mask_ptr, m_nCodeWordBytes);
m_cCrypto->hash(hash_ptr, AES_BYTES, tmpbuf, hashinbytes);
//m_cCrypto->hash_ctr(hash_ptr, AES_BYTES, mask_ptr, m_nCodeWordBytes, ot_id);
#endif
#ifdef DEBUG_HASH_OUTPUT
cout << "hash output for ot_id = " << ot_id << " and element_id = " << u << ": ";
for(uint32_t j = 0; j < AES_BYTES; j++)
cout << (hex) << (unsigned int) hash_buf[j];
cout << (dec) << endl;
#endif
}
uint64_t mask_id;
@ -151,14 +168,17 @@ public:
}
mask.delCBitVector();
free(hash_buf);
free(tmpbuf);
}
//Expansion routine for the client
void ClientExpand(CBitVector& matrix, uint32_t ot_begin_id, uint32_t processedOTs) {
//uint8_t hash_buf[m_cCrypto->get_hash_bytes()];
uint64_t ot_id, bin_id;
uint32_t hashinbytes = m_nCodeWordBytes + sizeof(uint64_t);
uint8_t *Mptr = matrix.GetArr();
uint8_t* hash_buf = (uint8_t*) malloc(m_nCodeWordBytes);
uint8_t* tmpbuf = (uint8_t*) malloc(hashinbytes);
for(ot_id = ot_begin_id; ot_id < ot_begin_id+processedOTs; ot_id++, Mptr+=m_nCodeWordBytes)
{
@ -176,7 +196,10 @@ public:
((uint64_t*) Mptr)[0] ^= ot_id;
m_cCrypto->aes_compression_hash(m_kCRFKey, hash_buf, Mptr, m_nCodeWordBytes);
#else
m_cCrypto->hash_ctr(hash_buf, AES_BYTES, Mptr, m_nCodeWordBytes, ot_id);
memcpy(tmpbuf, (uint8_t*) &ot_id, sizeof(uint64_t));
memcpy(tmpbuf+sizeof(uint64_t), Mptr, m_nCodeWordBytes);
m_cCrypto->hash(hash_buf, AES_BYTES, tmpbuf, hashinbytes);
//m_cCrypto->hash_ctr(hash_buf, AES_BYTES, Mptr, m_nCodeWordBytes, ot_id);
#endif
// cout << "Client expanding for bin_id : " << bin_id << endl;
@ -187,12 +210,13 @@ public:
#ifdef DEBUG_HASH_OUTPUT
cout << "hash output for ot_id = " << ot_id << ": ";
for(uint32_t j = 0; j < AES_BYTES; j++)
cout << (hex) << (unsigned int) hash_buf[j];
cout << (dec) << endl;
cout << (hex) << (uint32_t) hash_buf[j];
cout << (dec) << ", " << (ot_begin_id) << ", " << processedOTs << ", " << m_nCodeWordBytes << ", " << (uint64_t) Mptr << endl;
#endif
}
}
free(hash_buf);
free(tmpbuf);
}
//the out vector contains the matrix with the data that needs to be hashed, uptr is a pointer to the choice-bits of the server in the base-OTs