int main(void)
{
mpz_t p, q, N;
mpz_init(p);
mpz_init(q);
mpz_init(N);
// In a real application, p and q must be stored somewhere safe.
pbc_mpz_randomb(p, 512);
pbc_mpz_randomb(q, 512);
mpz_nextprime(p, p);
mpz_nextprime(q, q);
mpz_mul(N, p, q);
pbc_param_t param;
pbc_param_init_a1_gen(param, N);
pbc_param_out_str(stdout, param);
pbc_param_clear(param);
mpz_clear(p);
mpz_clear(q);
mpz_clear(N);
return 0;
}
int main(int argc, char **argv) {
int rbits = argc > 1 ? atoi(argv[1]) : 160;
int qbits = argc > 2 ? atoi(argv[2]) : 512;
pbc_param_t par;
pbc_param_init_a_gen(par, rbits, qbits);
pbc_param_out_str(stdout, par);
pbc_param_clear(par);
return 0;
}
int main(int argc, char* argv[]) {
QTextStream err(stderr, QIODevice::WriteOnly);
if(argc != 2) {
err << "Usage: " << argv[0] << " qbits\n";
return 1;
}
int qbits;
QTextStream in(argv[1], QIODevice::ReadOnly);
in >> qbits;
if(qbits < 10) {
err << "qbits must be greater than 10\n";
return 1;
}
QTextStream out(stdout, QIODevice::WriteOnly);
out << "--- PBC Parameter Utility ---\n";
out << "r < q (for prime r and q)\n";
out << "Bits: " << qbits << "\n";
out << "\n\n";
out.flush();
pbc_param_t params;
pairing_t pairing;
const int rbits = qbits-8;
pbc_param_init_a_gen(params, rbits, qbits);
pbc_param_out_str(stdout, params);
pairing_init_pbc_param(pairing, params);
element_t gen1;
element_t neg1;
element_t gent;
element_t tmp, tmp2;
element_init_G1(tmp, pairing);
element_init_G1(tmp2, pairing);
element_init_Zr(neg1, pairing);
element_init_G1(gen1, pairing);
element_init_G1(gent, pairing);
// neg1 = 1
element_set1(neg1);
// neg1 = -1 mod r
element_neg(neg1, neg1);
do {
element_random(gen1);
// tmp = gen1^-1
element_pow_zn(tmp, gen1, neg1);
// tmp = (gen1^-1)*gen1 == gen1^r
element_mul(tmp2, tmp, gen1);
} while (!element_is1(tmp2));
element_fprintf(stdout, "g1 = %B\n", gen1);
do {
element_random(gent);
// tmp = gen1^-1
element_pow_zn(tmp, gent, neg1);
// tmp = (gen1^-1)*gen1 == gen1^r
element_mul(tmp2, tmp, gent);
} while (!element_is1(tmp2));
element_fprintf(stdout, "gT = %B\n", gent);
element_clear(gen1);
element_clear(gent);
element_clear(tmp);
element_clear(tmp2);
element_clear(neg1);
pbc_param_clear(params);
pairing_clear(pairing);
return 0;
}
void pairing_param_to_file( pbc_param_t param, char* outputFile){
FILE* fp_pairing_param = fopen(outputFile, "w");
pbc_param_out_str( fp_pairing_param, param );
fclose( fp_pairing_param );
}
