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/*
Copyright (C) 2019-Present SKALE Labs
This file is part of sgxwallet.
sgxwallet is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
sgxwallet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with sgxwallet. If not, see <https://www.gnu.org/licenses/>.
@file domain_parameters.c
@author Stan Kladko
@date 2019
*/
#ifdef USER_SPACE
#include <gmp.h>
#else
#include <../tgmp-build/include/sgx_tgmp.h>
#endif
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include "Point.h"
#include "DomainParameters.h"
/*Initialize a curve*/
domain_parameters domain_parameters_init()
{
domain_parameters curve;
curve = calloc(sizeof(struct domain_parameters_s),1);
//Initialize all members
mpz_init(curve->p);
mpz_init(curve->a);
mpz_init(curve->b);
curve->G = point_init();
mpz_init(curve->n);
mpz_init(curve->h);
return curve;
}
/*Sets the name of a curve*/
void domain_parameters_set_name(domain_parameters curve, char* name)
{
int len = strlen(name);
curve->name = (char*)calloc( sizeof(char) * (len+1), 1 );
curve->name[len] = '\0';
strncpy(curve->name, name, len+1);
}
/*Set domain parameters from decimal unsigned long ints*/
void domain_parameters_set_ui(domain_parameters curve,
char* name,
unsigned long int p,
unsigned long int a,
unsigned long int b,
unsigned long int Gx,
unsigned long int Gy,
unsigned long int n,
unsigned long int h)
{
domain_parameters_set_name(curve, name);
mpz_set_ui(curve->p, p);
mpz_set_ui(curve->a, a);
mpz_set_ui(curve->b, b);
point_set_ui(curve->G, Gx, Gy);
mpz_set_ui(curve->n, n);
mpz_set_ui(curve->h, h);
}
/*Set domain parameters from hexadecimal string*/
void domain_parameters_set_hex(domain_parameters curve, char* name, char* p, char* a, char* b, char* Gx, char* Gy, char* n, char* h)
{
domain_parameters_set_name(curve, name);
mpz_set_str(curve->p, p, 16);
mpz_set_str(curve->a, a, 16);
mpz_set_str(curve->b, b, 16);
point_set_hex(curve->G, Gx, Gy);
mpz_set_str(curve->n, n, 16);
mpz_set_str(curve->h, h, 16);
}
/*Release memory*/
void domain_parameters_clear(domain_parameters curve)
{
if (!curve)
return;
mpz_clear(curve->p);
mpz_clear(curve->a);
mpz_clear(curve->b);
point_clear(curve->G);
mpz_clear(curve->n);
mpz_clear(curve->h);
free(curve->name);
free(curve);
}