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// Generate MNT curve(s) for a given D.
#include <stdint.h> // for intptr_t
#include "pbc.h"
#include "pbc_utils.h" // for UNUSED_VAR
int generate(pbc_cm_t cm, void *data) {
UNUSED_VAR(data);
pbc_param_t param;
pbc_info("gendparam: computing Hilbert polynomial and finding roots...");
pbc_param_init_d_gen(param, cm);
pbc_info("gendparam: bits in q = %zu\n", mpz_sizeinbase(cm->q, 2));
pbc_param_out_str(stdout, param);
pbc_param_clear(param);
return 1;
}
int main(int argc, char **argv) {
int D = 9563;
if (argc > 1) {
int m;
D = atoi(argv[1]);
m = D % 4;
if (D <= 0 || m == 1 || m == 2) {
pbc_die("D must be 0 or 3 mod 4 and positive");
}
}
pbc_info("Using D = %d\n", D);
if (!pbc_cm_search_d(generate, NULL, D, 500)) {
pbc_die("no suitable curves for this D");
}
return 0;
}
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