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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2024 J08nY
*/
#include "family.h"
#include "cm/cm_any.h"
#include "gen/seed.h"
#include "misc/config.h"
#include "util/random.h"
#define FAMILIES (FAMILY_KSS40 + 1)
static GEN nz_store[FAMILIES] = {0};
static GEN pz_store[FAMILIES] = {0};
static GEN rz_store[FAMILIES] = {0};
static GEN tz_store[FAMILIES] = {0};
static GEN D_store[FAMILIES] = {0};
void family_init() {
pari_sp ltop = avma;
nz_store[FAMILY_BN] = gclone(closure_evalgen(compile_str("(z) -> z")));
pz_store[FAMILY_BN] = gclone(closure_evalgen(
compile_str("(z) -> 36*z^4 + 36*z^3 + 24*z^2 + 6*z + 1")));
rz_store[FAMILY_BN] = gclone(closure_evalgen(
compile_str("(z) -> 36*z^4 + 36*z^3 + 18*z^2 + 6*z + 1")));
tz_store[FAMILY_BN] =
gclone(closure_evalgen(compile_str("(z) -> 6*z + 1")));
D_store[FAMILY_BN] = gclone(stoi(-3));
nz_store[FAMILY_BLS12] = gclone(closure_evalgen(compile_str("(z) -> z")));
pz_store[FAMILY_BLS12] = gclone(closure_evalgen(
compile_str("(z) -> (z - 1)^2 * (z^4 - z^2 + 1)/3 + z")));
rz_store[FAMILY_BLS12] =
gclone(closure_evalgen(compile_str("(z) -> z^4 - z^2 + 1")));
tz_store[FAMILY_BLS12] =
gclone(closure_evalgen(compile_str("(z) -> z + 1")));
D_store[FAMILY_BLS12] = gclone(stoi(-3));
nz_store[FAMILY_BLS24] = gclone(closure_evalgen(compile_str("(z) -> z")));
pz_store[FAMILY_BLS24] = gclone(closure_evalgen(
compile_str("(z) -> (z - 1)^2 * (z^8 - z^4 + 1)/3 + z")));
rz_store[FAMILY_BLS24] =
gclone(closure_evalgen(compile_str("(z) -> z^8 - z^4 + 1")));
tz_store[FAMILY_BLS24] =
gclone(closure_evalgen(compile_str("(z) -> z + 1")));
D_store[FAMILY_BLS24] = gclone(stoi(-3));
//TODO: This does not work...
nz_store[FAMILY_KSS16] =
gclone(closure_evalgen(compile_str("(z) -> 70*z + 25")));
pz_store[FAMILY_KSS16] = gclone(closure_evalgen(
compile_str("(z) -> (z^10 + 2*z^9 + 5*z^8 + 48*z^6 + 152*z^5 + 240*z^4 "
"+ 625*z^2 + 2398*z + 3125)/980")));
rz_store[FAMILY_KSS16] = gclone(
closure_evalgen(compile_str("(z) -> (z^8 + 48*z^4 + 625)/61250")));
tz_store[FAMILY_KSS16] =
gclone(closure_evalgen(compile_str("(z) -> (2*z^5 + 41*z + 35)/35")));
D_store[FAMILY_KSS16] = gclone(stoi(-1));
avma = ltop;
}
static seed_t *family_new_seed() {
seed_t *result = seed_new();
result->type = SEED_FAMILY;
return result;
}
GENERATOR(family_gen_seed_random) {
curve->seed = family_new_seed();
curve->seed->family.z = random_int(cfg->bits);
return 1;
}
GENERATOR(family_gen_seed_input) {
pari_sp ltop = avma;
GEN inp = input_int("z:", cfg->bits);
if (gequalm1(inp)) {
avma = ltop;
return 0;
} else if (equalii(inp, gen_m2)) {
avma = ltop;
return INT_MIN;
}
curve->seed = family_new_seed();
curve->seed->family.z = inp;
return 1;
}
GENERATOR(family_gen_field) {
pari_sp ltop = avma;
GEN n = closure_callgen1(nz_store[cfg->family], curve->seed->family.z);
GEN pz = closure_callgen1(pz_store[cfg->family], n);
if (typ(pz) != t_INT || !isprime(pz)) {
avma = ltop;
return -1;
}
printf("p");
GEN rz = closure_callgen1(rz_store[cfg->family], n);
if (typ(rz) != t_INT || !isprime(rz)) {
avma = ltop;
return -1;
}
printf("r");
curve->field = gerepilecopy(ltop, pz);
return 1;
}
static GEN b = NULL;
static curve_t *b_curve = NULL;
GENERATOR(family_gen_equation_iter) {
curve->a = gmodulo(gen_0, curve->field);
pari_sp ltop = avma;
if (!b) {
b = gclone(gen_1);
curve->b = gmodulo(gen_1, curve->field);
b_curve = curve;
return 1;
} else {
if (curve == b_curve) {
GEN bn = addii(b, gen_1);
gunclone(b);
b = gclone(bn);
curve->b = gerepilecopy(ltop, gmodulo(bn, curve->field));
return 1;
} else {
// dont use b, regenerate it,
gunclone(b);
b = gclone(gen_1);
curve->b = gerepilecopy(ltop, gmodulo(gen_1, curve->field));
b_curve = curve;
return 1;
}
}
}
GENERATOR(family_gen_equation_cm) {
GEN n = closure_callgen1(nz_store[cfg->family], curve->seed->family.z);
GEN rz = closure_callgen1(rz_store[cfg->family], n);
GEN D = D_store[cfg->family];
GEN e = cm_construct_curve_subgroup(rz, D, curve->field);
if (e) {
curve->a = ell_get_a4(e);
curve->b = ell_get_a6(e);
return 1;
}
return -3;
}
GENERATOR(family_gen_order) {
pari_sp ltop = avma;
GEN n = closure_callgen1(nz_store[cfg->family], curve->seed->family.z);
GEN rz = closure_callgen1(rz_store[cfg->family], n);
GEN ord = ellff_get_card(curve->curve);
if (dvdii(ord, rz)) {
if (isclone(ord)) {
curve->order = gerepilecopy(ltop, ord);
} else {
avma = ltop;
curve->order = ord;
}
return 1;
} else {
avma = ltop;
return -2;
}
}
void family_quit() {
for (int i = 0; i < FAMILIES; i++) {
if (nz_store[i]) {
gunclone(nz_store[i]);
}
if (pz_store[i]) {
gunclone(pz_store[i]);
}
if (rz_store[i]) {
gunclone(rz_store[i]);
}
if (tz_store[i]) {
gunclone(tz_store[i]);
}
if (D_store[i]) {
gunclone(D_store[i]);
}
}
if (b) {
gunclone(b);
}
}
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