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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017 J08nY
*/
#include "output.h"
#include <parson/parson.h>
#include "math/curve.h"
#include "math/field.h"
FILE *out;
FILE *debug;
char *output_scsv(curve_t *curve, const config_t *cfg) {
pari_sp ltop = avma;
GEN vector = curve_params(curve);
long len = glength(vector);
char *params[len];
size_t lengths[len];
size_t total = 0;
for (long i = 0; i < len; ++i) {
params[i] = pari_sprintf("%P#x", gel(vector, i + 1));
lengths[i] = strlen(params[i]);
total += lengths[i];
}
char *result = (char *)malloc(total + len);
if (!result) {
perror("Couldn't malloc.");
exit(1);
}
size_t offset = 0;
for (long i = 0; i < len; ++i) {
memcpy(result + offset, params[i], lengths[i]);
free(params[i]);
offset += lengths[i];
if (i != len - 1) {
result[offset] = ',';
offset++;
}
}
memset(result + offset, 0, 1);
avma = ltop;
return result;
}
void output_fcsv(FILE *out, curve_t *curve, const config_t *cfg) {
char *string = output_scsv(curve, cfg);
fprintf(out, "%s\n", string);
fflush(out);
free(string);
}
void output_csv(curve_t *curve, const config_t *cfg) {
output_fcsv(out, curve, cfg);
}
static JSON_Value *output_jjson(curve_t *curve, const config_t *cfg) {
pari_sp ltop = avma;
// root object/value is curve
JSON_Value *root_value = json_value_init_object();
JSON_Object *root_object = json_value_get_object(root_value);
switch (cfg->field) {
case FIELD_PRIME: {
char *prime = pari_sprintf("%P#x", curve->field);
json_object_dotset_string(root_object, "field.p", prime);
pari_free(prime);
break;
}
case FIELD_BINARY: {
GEN field = field_params(curve->field);
char *m = pari_sprintf("%P#x", gel(field, 1));
char *e1 = pari_sprintf("%P#x", gel(field, 2));
char *e2 = pari_sprintf("%P#x", gel(field, 3));
char *e3 = pari_sprintf("%P#x", gel(field, 4));
json_object_dotset_string(root_object, "field.m", m);
json_object_dotset_string(root_object, "field.e1", e1);
json_object_dotset_string(root_object, "field.e2", e2);
json_object_dotset_string(root_object, "field.e3", e3);
pari_free(m);
pari_free(e1);
pari_free(e2);
pari_free(e3);
break;
}
default:
fprintf(stderr, "Error, field has unknown amount of elements.\n");
exit(1);
}
char *a = pari_sprintf("%P#x", field_elementi(curve->a));
json_object_set_string(root_object, "a", a);
pari_free(a);
char *b = pari_sprintf("%P#x", field_elementi(curve->b));
json_object_set_string(root_object, "b", b);
pari_free(b);
char *order = pari_sprintf("%P#x", curve->order);
json_object_set_string(root_object, "order", order);
pari_free(order);
if (curve->ngens) {
JSON_Value *gens_value = json_value_init_array();
JSON_Array *gens_array = json_value_get_array(gens_value);
for (size_t i = 0; i < curve->ngens; ++i) {
JSON_Value *point_value = json_value_init_object();
JSON_Object *point_object = json_value_get_object(point_value);
char *x = pari_sprintf(
"%P#x", field_elementi(gel(curve->generators[i]->point, 1)));
json_object_set_string(point_object, "x", x);
pari_free(x);
char *y = pari_sprintf(
"%P#x", field_elementi(gel(curve->generators[i]->point, 2)));
json_object_set_string(point_object, "y", y);
pari_free(y);
char *p_order = pari_sprintf("%P#x", curve->generators[i]->order);
json_object_set_string(point_object, "order", p_order);
pari_free(p_order);
if (curve->generators[i]->cofactor) {
char *cofactor =
pari_sprintf("%P#x", curve->generators[i]->cofactor);
json_object_set_string(point_object, "cofactor", cofactor);
pari_free(cofactor);
}
json_array_append_value(gens_array, point_value);
}
json_object_set_value(root_object, "generators", gens_value);
}
if (curve->npoints) {
JSON_Value *points_value = json_value_init_array();
JSON_Array *points_array = json_value_get_array(points_value);
for (size_t i = 0; i < curve->npoints; ++i) {
JSON_Value *point_value = json_value_init_object();
JSON_Object *point_object = json_value_get_object(point_value);
char *x = pari_sprintf(
"%P#x", field_elementi(gel(curve->points[i]->point, 1)));
json_object_set_string(point_object, "x", x);
pari_free(x);
char *y = pari_sprintf(
"%P#x", field_elementi(gel(curve->points[i]->point, 2)));
json_object_set_string(point_object, "y", y);
pari_free(y);
char *p_order = pari_sprintf("%P#x", curve->points[i]->order);
json_object_set_string(point_object, "order", p_order);
pari_free(p_order);
if (curve->points[i]->cofactor) {
char *cofactor =
pari_sprintf("%P#x", curve->points[i]->cofactor);
json_object_set_string(point_object, "cofactor", cofactor);
pari_free(cofactor);
}
json_array_append_value(points_array, point_value);
}
json_object_set_value(root_object, "points", points_value);
}
avma = ltop;
return root_value;
}
char *output_sjson(curve_t *curve, const config_t *cfg) {
JSON_Value *root_value = output_jjson(curve, cfg);
char *result = json_serialize_to_string_pretty(root_value);
json_value_free(root_value);
return result;
}
void output_fjson(FILE *out, curve_t *curve, const config_t *cfg) {
char *s = output_sjson(curve, cfg);
fprintf(out, "%s\n", s);
fflush(out);
json_free_serialized_string(s);
}
void output_json(curve_t *curve, const config_t *cfg) {
output_fjson(out, curve, cfg);
}
void output_init(const config_t *cfg) {
json_set_allocation_functions(pari_malloc, pari_free);
if (cfg->output) {
out = fopen(cfg->output, cfg->append ? "a" : "w");
if (!out) {
// fallback to stdout and output err
out = stdout;
perror("Failed to open output file.");
}
} else {
out = stdout;
}
setvbuf(out, NULL, _IONBF, 0);
if (cfg->debug) {
debug = fopen(cfg->debug, "w");
if (!debug) {
debug = stdout;
perror("Failed to open verbose output file.");
}
} else {
debug = stdout;
}
setvbuf(debug, NULL, _IONBF, 0);
switch (cfg->format) {
case FORMAT_JSON:
output_s = &output_sjson;
output_f = &output_fjson;
output_o = &output_json;
break;
case FORMAT_CSV:
output_s = &output_scsv;
output_f = &output_fcsv;
output_o = &output_csv;
break;
}
}
void output_quit(void) {
if (out != NULL && out != stdout) {
fclose(out);
}
}
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