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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017-2018 J08nY
*/
#include "cm.h"
#include "anomalous.h"
#include "cm_any.h"
#include "cm_prime.h"
#include "exhaustive/check.h"
#include "exhaustive/exhaustive.h"
#include "gen/curve.h"
#include "gen/field.h"
#include "gen/gens.h"
#include "gen/hex.h"
#include "gen/metadata.h"
#include "gen/point.h"
#include "obj/curve.h"
#include "supersingular.h"
#include "util/str.h"
static void cm_ginit(gen_f *generators, bool prime) {
// SEED unused.
generators[OFFSET_SEED] = &gen_skip;
// Setup stuff so it can be overridden.
if (cfg->unique) {
generators[OFFSET_GENERATORS] = &gens_gen_one;
} else {
generators[OFFSET_GENERATORS] = &gens_gen_any;
}
if (cfg->metadata) {
generators[OFFSET_METADATA] = &metadata_gen;
} else {
generators[OFFSET_METADATA] = &gen_skip;
}
switch (cfg->points.type) {
case POINTS_RANDOM:
if (cfg->points.amount) {
generators[OFFSET_POINTS] = &points_gen_random;
} else {
generators[OFFSET_POINTS] = &point_gen_random;
}
break;
case POINTS_PRIME:
generators[OFFSET_POINTS] = &points_gen_prime;
break;
case POINTS_NONPRIME:
generators[OFFSET_POINTS] = &points_gen_nonprime;
break;
case POINTS_ALL:
generators[OFFSET_POINTS] = &points_gen_allgroups;
break;
case POINTS_NONE:
generators[OFFSET_POINTS] = &gen_skip;
break;
}
// Now do the actual CM setup.
if (cfg->method == METHOD_CM) {
generators[OFFSET_FIELD] = &gen_skip;
generators[OFFSET_A] = &gen_skip;
generators[OFFSET_B] = &gen_skip;
if (prime) {
generators[OFFSET_CURVE] = &cm_gen_curve_prime;
generators[OFFSET_POINTS] = &points_gen_prime;
} else {
generators[OFFSET_CURVE] = &cm_gen_curve_any;
}
generators[OFFSET_ORDER] = &cm_gen_order;
} else if (cfg->method == METHOD_ANOMALOUS) {
generators[OFFSET_FIELD] = &anomalous_gen_field;
generators[OFFSET_A] = &gen_skip;
generators[OFFSET_B] = &anomalous_gen_equation;
generators[OFFSET_CURVE] = &curve_gen_any;
generators[OFFSET_ORDER] = &anomalous_gen_order;
} else if (cfg->method == METHOD_SUPERSINGULAR) {
if (cfg->random & RANDOM_FIELD) {
generators[OFFSET_FIELD] = &field_gen_random;
} else {
generators[OFFSET_FIELD] = &field_gen_input;
}
generators[OFFSET_A] = &gen_skip;
generators[OFFSET_B] = &supersingular_gen_equation;
generators[OFFSET_CURVE] = &curve_gen_any;
generators[OFFSET_ORDER] = &supersingular_gen_order;
}
}
static void cm_ainit(arg_t **gen_argss, arg_t **check_argss,
const char *order_s) {
if (cfg->method == METHOD_CM) {
arg_t *curve_arg = arg_new();
arg_t *order_arg = arg_new();
char *order = try_strdup(order_s);
curve_arg->args = order;
curve_arg->nargs = 1;
order_arg->args = order;
order_arg->nargs = 1;
order_arg->allocd = order;
gen_argss[OFFSET_CURVE] = curve_arg;
gen_argss[OFFSET_ORDER] = order_arg;
}
if (cfg->method == METHOD_ANOMALOUS) {
arg_t *field_arg = arg_new();
arg_t *eq_arg = arg_new();
size_t *i = try_calloc(sizeof(size_t));
*i = 3;
field_arg->args = i;
field_arg->nargs = 1;
eq_arg->args = i;
eq_arg->nargs = 1;
eq_arg->allocd = i;
gen_argss[OFFSET_FIELD] = field_arg;
gen_argss[OFFSET_B] = eq_arg;
}
if (cfg->points.type == POINTS_RANDOM) {
arg_t *points_arg = arg_new();
points_arg->args = &cfg->points.amount;
points_arg->nargs = 1;
gen_argss[OFFSET_POINTS] = points_arg;
}
}
static void cm_cinit(check_t **validators) {
check_t *curve_check = check_new(curve_check_nonzero, NULL);
validators[OFFSET_CURVE] = curve_check;
if (cfg->hex_check) {
check_t *hex_check = check_new(hex_check_param, NULL);
validators[OFFSET_POINTS] = hex_check;
}
}
static int cm_init(exhaustive_t *setup) {
bool ord_prime = false;
char *order_s = NULL;
if (cfg->method == METHOD_CM) {
size_t delims = str_cnt(cfg->cm_order, ',');
GEN order;
if (delims == 0) {
order = strtoi(cfg->cm_order);
order_s = cfg->cm_order;
} else {
GEN factors = gtovec0(gen_0, delims + 1);
char *delim;
char *s_start = try_strdup(cfg->cm_order);
char *s = s_start;
long i = 1;
while (true) {
if ((delim = strchr(s, ',')) != NULL) {
*delim = 0;
gel(factors, i++) = strtoi(s);
s = delim + 1;
} else {
gel(factors, i++) = strtoi(s);
break;
}
}
order = gen_1;
long len = glength(factors);
for (long j = 1; j <= len; ++j) {
GEN factor = gel(factors, j);
if (isprime(factor)) {
addprimes(gtovec(factor));
} else {
GEN factored = Z_factor(order);
addprimes(gel(factored, 1));
}
order = mulii(order, factor);
}
try_free(s_start);
order_s = pari_sprintf("%Pi", order);
}
if (gequal0(order)) {
fprintf(err, "Order requested not a number: %s\n", cfg->cm_order);
return 1;
}
long ord_log = logint0(order, gen_2, NULL);
if (ord_log > cfg->bits) {
pari_fprintf(err,
"Order requested does not fit(2^%li) into requested "
"bitsize(2^%li): %Pi\n",
ord_log, cfg->bits, order);
return 1;
}
if (delims == 0) {
ord_prime = (bool)isprime(order);
} else {
ord_prime = false;
}
}
if (cfg->method == METHOD_ANOMALOUS) {
GEN order;
if (cfg->anom_order) {
//TODO: Finish implementation of anomalous method with given order.
}
anomalous_init();
}
cm_ginit(setup->generators, ord_prime);
cm_ainit(setup->gen_argss, setup->check_argss, order_s);
cm_cinit(setup->validators);
exhaustive_uinit(setup->unrolls);
return 0;
}
static void cm_quit(exhaustive_t *setup) {
if (cfg->method == METHOD_ANOMALOUS) {
anomalous_quit();
}
exhaustive_clear(setup);
}
int cm_do() {
debug_log_start("Starting Complex Multiplication method");
gen_f generators[OFFSET_END] = {NULL};
arg_t *gen_argss[OFFSET_END] = {NULL};
check_t *validators[OFFSET_END] = {NULL};
arg_t *check_argss[OFFSET_END] = {NULL};
unroll_f unrolls[OFFSET_END] = {NULL};
exhaustive_t setup = {.generators = generators,
.gen_argss = gen_argss,
.validators = validators,
.check_argss = check_argss,
.unrolls = unrolls};
int result = cm_init(&setup);
if (result) {
return result;
}
result = exhaustive_generate(&setup);
cm_quit(&setup);
debug_log_start("Finished Complex Multiplication method");
return result;
}
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