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pprl5.c
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pprl5.c
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// Boneh-Lynn-Shacham short signatures demo.
//
// See the PBC_sig library for a practical implementation.
//
// Ben Lynn
#include <pbc.h>
#include <pbc_test.h>
#include <time.h>
#include <string.h>
void get_hash_code(char*temp,char*s,int start);
int main(int argc, char **argv) {
pairing_t pairing;
element_t g, hA,hB;
element_t public_keyA, sigA, public_keyB, sigB;
element_t secret_keyA, secret_keyB;
element_t temp1, temp2;
char bufferA[1200]="",bufferB[1200]=""; //file read buffer
float weight[5]={0.2,0.2,0.2,0.2,0.2};
clock_t start, end; //calculate the program running time
pbc_demo_pairing_init(pairing, argc, argv);
element_init_G2(g, pairing);
element_init_G2(public_keyA, pairing);
element_init_G2(public_keyB, pairing);
element_init_G1(hA, pairing);
element_init_G1(hB, pairing);
element_init_G1(sigA, pairing);
element_init_G1(sigB, pairing);
element_init_GT(temp1, pairing);
element_init_GT(temp2, pairing);
element_init_Zr(secret_keyA, pairing);
element_init_Zr(secret_keyB, pairing);
//generate system parameters
element_random(g);
//generate private key
element_random(secret_keyA);
element_random(secret_keyB);
//compute corresponding public key
element_pow_zn(public_keyA, g, secret_keyA);
element_pow_zn(public_keyB, g, secret_keyB);
FILE *filePair;
filePair=fopen("pair","w");
int comparetimes = 0;
int hitnumber = 0;
//char filename1[15][10] = {"outputa01", "outputb01", "pair01.txt", "outputa02", "outputb02", "pair02.txt","outputa03", "outputb03", "pair03.txt","outputa04", "outputb04", "pair04.txt","outputa05", "outputb05", "pair05.txt"};
char filename1[10][11] = {"outputa01", "outputb01", "outputa02", "outputb02","outputa03", "outputb03", "outputa04", "outputb04", "outputa05", "outputb05"};
int PPRLround = 0;
for(int fround = 0; fround < 10; fround += 2){
PPRLround++;
FILE *fileA,*fileB;
fileA=fopen(filename1[0 + fround],"r"); //open files
fileB=fopen(filename1[1 + fround],"rb+");
int ia =1,ib=1,totalPair=0; //ia:the line number of A
float score=0;
char tempA[115]="",tempB[115]=""; //store the slice of A and B
start=clock(); //start timer
while(fgets(bufferA,sizeof(bufferA),fileA) != NULL) //read a line from A
{
while(fgets(bufferB,sizeof(bufferB),fileB) != NULL) //read a line from B
{
for(int i=1;i<=5;i++) //test the 10 elements of A and B
{
strcpy(tempA,""); //init
strcpy(tempB,"");
get_hash_code(tempA,bufferA,i-1); //get the slice of string
get_hash_code(tempB,bufferB,i-1);
//generate element from a hash
element_from_hash(hA, tempA, sizeof(tempA));
element_from_hash(hB, tempB, sizeof(tempB));
//making signature
element_pow_zn(sigA, hA, secret_keyA);
element_pow_zn(sigB, hB, secret_keyB);
//apply
pairing_apply(temp1,sigA,public_keyB,pairing);
pairing_apply(temp2,sigB,public_keyA,pairing);
//compare
comparetimes++;
if (!element_cmp(temp1, temp2)) {
score=score+weight[i-1];
}
}
if (score>0.8) {
//claim that 2 records are equivalent
printf("[%d,%d,%f]\n",ia,ib,score);
fprintf(filePair,"[%s , %d , %d] = %f\n",filename1[0 + fround],ia,ib,score);
totalPair++;
hitnumber++;
}
score=0;
ib++;
}
ia++; //clear all variables
ib=1;
score=0;
strcpy(bufferA,"");
strcpy(bufferB,"");
rewind(fileB);
}
end=clock(); //end timer
printf("PPRL finished.It takes %lf s.\n",(end-start)/(double)(CLOCKS_PER_SEC));
printf("Number of total pairs is:%d\n",totalPair);
printf("END for %d round\n",PPRLround);
fprintf(filePair,"PPRL finished.It takes %lf s.\n",(end-start)/(double)(CLOCKS_PER_SEC));
fprintf(filePair,"Number of total pairs is:%d\n",totalPair);
fclose(fileA);
fclose(fileB);
}
fclose(filePair);
printf("total compare times: %d\n", comparetimes);
printf("total hit times: %d\n", hitnumber);
/*
char filename2[15][10] = {"outputa6", "outputa6", "pair6.txt", "outputa7", "outputb7", "pair7.txt","outputa8", "outputb8", "pair8.txt","outputa9", "outputb9", "pair9.txt","outputaA", "outputbA", "pairA.txt"};
for(int fround = 0; fround < 15; fround += 3){
FILE *fileA,*fileB,*filePair;
fileA=fopen(filename2[0 + fround],"r"); //open files
fileB=fopen(filename2[1 + fround],"rb+");
filePair=fopen(filename2[2 + fround],"w");
int ia =1,ib=1,totalPair=0; //ia:the line number of A
float score=0;
char tempA[115]="",tempB[115]=""; //store the slice of A and B
start=clock(); //start timer
while(fgets(bufferA,sizeof(bufferA),fileA) != NULL) //read a line from A
{
while(fgets(bufferB,sizeof(bufferB),fileB) != NULL) //read a line from B
{
for(int i=1;i<=10;i++) //test the 10 elements of A and B
{
strcpy(tempA,""); //init
strcpy(tempB,"");
get_hash_code(tempA,bufferA,i-1); //get the slice of string
get_hash_code(tempB,bufferB,i-1);
//generate element from a hash
element_from_hash(hA, tempA, sizeof(tempA));
element_from_hash(hB, tempB, sizeof(tempB));
//making signature
element_pow_zn(sigA, hA, secret_keyA);
element_pow_zn(sigB, hB, secret_keyB);
//apply
pairing_apply(temp1,sigA,public_keyB,pairing);
pairing_apply(temp2,sigB,public_keyA,pairing);
//compare
if (!element_cmp(temp1, temp2)) {
score=score+weight[i-1];
}
}
if (score>0.8) {
//claim that 2 records are equivalent
printf("[%d,%d,%f]\n",ia,ib,score);
fprintf(filePair,"[%d,%d,%f]\n",ia,ib,score);
totalPair++;
}
score=0;
ib++;
}
ia++; //clear all variables
ib=1;
score=0;
strcpy(bufferA,"");
strcpy(bufferB,"");
rewind(fileB);
}
end=clock(); //end timer
printf("PPRL finished.It takes %lf s.\n",(end-start)/(double)(CLOCKS_PER_SEC));
printf("Number of total pairs is:%d\n",totalPair);
fprintf(filePair,"PPRL finished.It takes %lf s.\n",(end-start)/(double)(CLOCKS_PER_SEC));
fprintf(filePair,"Number of total pairs is:%d\n",totalPair);
fclose(fileA);
fclose(fileB);
fclose(filePair);
}
*/
element_clear(sigA);
element_clear(public_keyA);
element_clear(secret_keyA);
element_clear(sigB);
element_clear(public_keyB);
element_clear(secret_keyB);
element_clear(g);
element_clear(hA);
element_clear(hB);
element_clear(temp1);
element_clear(temp2);
pairing_clear(pairing);
return 0;
}
void get_hash_code(char*temp,char*s,int start)
{
int i=0;
while(i<114)
{ //get the hash code
temp[i]=s[start*115+i];
i++;
}
}