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// List discriminant and bits in r and q for type G pairings that may be
// suitable for cryptography.
#include "pbc.h"
int show(pbc_cm_t cm, void *data) {
unsigned int D = * (unsigned *) data;
int qbits, rbits;
qbits = mpz_sizeinbase(cm->q, 2);
rbits = mpz_sizeinbase(cm->r, 2);
printf("%d, %d, %d\n", D, qbits, rbits);
fflush(stdout);
return 0;
}
void try(int tryD) {
pbc_cm_search_g(show, &tryD, tryD, 500);
}
int main(int argc, char **argv) {
unsigned int D = 0;
if (argc > 1) {
D = atoi(argv[1]);
if (D % 120) {
pbc_die("D must be multiple of 120");
}
}
printf("D < %u, bits in q, bits in r\n", 1000000000);
while (D < 1000000000) {
try(D + 43);
try(D + 67);
D+=120;
}
return 0;
}
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