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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017 J08nY
*/
#include "curve.h"
#include "exhaustive/seed.h"
#include "point.h"
#include "util/memory.h"
curve_t *curve_new(void) { return try_calloc(sizeof(curve_t)); }
curve_t *curve_copy(const curve_t *src, curve_t *dest) {
if (src->seed) dest->seed = seed_copy(src->seed, dest->seed);
if (src->field) dest->field = gcopy(src->field);
if (src->a) dest->a = gcopy(src->a);
if (src->b) dest->b = gcopy(src->b);
if (src->curve) dest->curve = gcopy(src->curve);
if (src->order) dest->order = gcopy(src->order);
if (src->generators) {
dest->generators = points_new_copy(src->generators, src->ngens);
dest->ngens = src->ngens;
}
if (src->points) {
dest->points = points_new_copy(src->points, src->npoints);
dest->npoints = src->npoints;
}
return dest;
}
curve_t *curve_new_copy(const curve_t *src) {
curve_t *result = curve_new();
return curve_copy(src, result);
}
curve_t *curve_clone(const curve_t *src, curve_t *dest) {
if (src->seed) dest->seed = seed_clone(src->seed, dest->seed);
if (src->field) dest->field = gclone(src->field);
if (src->a) dest->a = gclone(src->a);
if (src->b) dest->b = gclone(src->b);
if (src->curve) dest->curve = gclone(src->curve);
if (src->order) dest->order = gclone(src->order);
if (src->generators) {
dest->generators = points_new_clone(src->generators, src->ngens);
dest->ngens = src->ngens;
}
if (src->points) {
dest->points = points_new_clone(src->points, src->npoints);
dest->npoints = src->npoints;
}
return dest;
}
curve_t *curve_new_clone(const curve_t *src) {
curve_t *result = curve_new();
return curve_clone(src, result);
}
void curve_free(curve_t **curve) {
if (*curve) {
seed_free(&(*curve)->seed);
points_free_deep(&(*curve)->generators, (*curve)->ngens);
points_free_deep(&(*curve)->points, (*curve)->npoints);
if ((*curve)->curve) {
// TODO, this is possibly dangerous...
obj_free((*curve)->curve);
if (isclone((*curve)->curve)) {
gunclone((*curve)->curve);
}
}
if ((*curve)->field && isclone((*curve)->field)) {
gunclone((*curve)->field);
}
if ((*curve)->a && isclone((*curve)->a)) {
gunclone((*curve)->a);
}
if ((*curve)->b && isclone((*curve)->b)) {
gunclone((*curve)->b);
}
if ((*curve)->order && isclone((*curve)->order)) {
gunclone((*curve)->order);
}
pari_free(*curve);
*curve = NULL;
}
}
GENERATOR(curve_gen_any) {
pari_sp ltop = avma;
GEN v = gen_0;
switch (typ(curve->field)) {
case t_INT:
v = gtovec0(gen_0, 2);
gel(v, 1) = curve->a;
gel(v, 2) = curve->b;
break;
case t_FFELT:
v = gtovec0(gen_0, 5);
gel(v, 1) = gen_1;
gel(v, 2) = curve->a;
gel(v, 4) = curve->b;
break;
default:
pari_err_TYPE("curve_gen_any", curve->field);
}
GEN crv = ellinit(v, curve->field, -1);
if (glength(crv) == 0) {
avma = ltop;
return -3;
} else {
curve->curve = gerepilecopy(ltop, crv);
return 1;
}
}
GENERATOR(curve_gen_nonzero) {
pari_sp ltop = avma;
int any = curve_gen_any(curve, cfg, args);
if (any <= 0) {
return any;
}
if (gequal0(ell_get_disc(curve->curve))) {
avma = ltop;
return -3;
} else {
return 1;
}
}
static int curve_gen_seed_fp(curve_t *curve, const config_t *cfg, arg_t *args) {
// TODO implement
return INT_MIN;
}
static int curve_gen_seed_f2m(curve_t *curve, const config_t *cfg,
arg_t *args) {
// TODO implement
return INT_MIN;
}
GENERATOR(curve_gen_seed) {
switch (typ(curve->field)) {
case t_INT:
return curve_gen_seed_fp(curve, cfg, args);
case t_FFELT:
return curve_gen_seed_f2m(curve, cfg, args);
default:
pari_err_TYPE("curve_gen_seed", curve->field);
return INT_MIN; /* NOT REACHABLE */
}
}
UNROLL(curve_unroll) {
if (curve->curve) {
obj_free(curve->curve);
curve->curve = NULL;
}
return -1;
}
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