mphell_tuto_ec_random.c

Go to the documentation of this file.

/* 
  MPHELL-5.0 
  Author(s): The MPHELL team
 
 (C) Copyright 2015-2021 - Institut Fourier / Univ. Grenoble Alpes (France)
 
 This file is part of the MPHELL Library.
 MPHELL is free software: you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation, version 3 of the License.
 
 MPHELL 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 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public License
 along with MPHELL.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "mphell/mphell.h"
#include <stdio.h>
#include <string.h>
 
int main()
{
    init_mphell(128, RANDOM_AES128, DEVURANDOM);
    
    int i, j;
    bool res1;
    
    number p, n;
    field k;
    ec_curve E;
    
    number_init(&p, bits_to_nblock(512));
    number_init(&n, bits_to_nblock(512));
    field_alloc(k, FP, bits_to_nblock(512), NULL);
    
    number_set_str(p, "6703903964971298549787012499102923063739682910296196688861780721860882015036773488400937149083451713845015929093243025426876941405973284973216824503042159", 10); 
#if MPHELL_USE_AMNS == 1
    amns AMNS;
#if MPHELL_USE_AMNS_32 == 0
    amns_alloc_init_str(&AMNS, "[1, 10, [-2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1], 56, 1949715550477596391050085143019979962187489833398677588465030396092261681514158064546239921492428732105309264987401712740590694494340370264447759306218043, [-845528290199225, 1497961916346049, 90585915898951, 820213644784137, -418821346875421, 109771977934600, 1417978576852651, -962942853221725, 143096186561835, -1324914973060058], [15983654131394969033, 16968083590411639579, 11782429094846756482, 11205845458815222214, 17093288067982085116, 9998295128409825969, 11270860305329337426, 2425357736791511401, 8703551856315982458, 8445990296066650717], [-127069546631968, -166989335710652, -2445954811583878, 49017698439948, 227449256453923, 141269326656102, 1701918410502233, -1073389722232402, 563013565593825, -217007402518282], [1899551367165673, -804402297003831, -99557494915669, 1068669298035161, -1015237632853644, 1181005277717623, -1774109424859449, -574005976420006, 529912473712413, -494747968884078]]", p);
#else
    amns_alloc_init_str(&AMNS, "[0, 25, [-2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1], 25, 5272013709936016948593560360247807441965478824314811527282560785564390252940232029521554688907682841600720826163445829871273796278697033507587796526749811, [403175, 106687, -564204, -559311, 227005, -201089, 159568, -207716, 189216, 473331, -643646, 268885, -114862, 458206, 253944, 451925, 136939, -161289, -616347, 169765, 41552, 534117, -226111, -574653, -172568], [1143524063, 3060431233, 1471859933, 2062471496, 365278526, 1627772417, 1441512363, 4213903656, 1884167813, 1257312250, 696377799, 2267257753, 4181862705, 3615529898, 2596401023, 148574974, 2138936575, 2937846772, 3262652758, 3270552461, 2820818494, 1359648921, 546172945, 1534080154, 2030909667], [717930, 1018381, 497620, -1177464, 506923, 1417195, 1126168, -20875, -1566829, -22859, -397311, 634966, -193429, -575208, -1608771, -807302, -955671, 973637, -809281, -1397935, -794421, 349799, -101423, 22396, -643027], [-675578, -1661259, 959538, 1399909, 444505, -1696167, -427423, 2030238, -196183, 81582, -1615037, -304743, 248531, -205239, 264770, -188737, -1490392, -1705651, -1043280, 1956742, 44353, -1233696, -1377288, 62848, 1193153]]", p);
#endif
    field_set_amns(k, AMNS);
#endif
    
    field_create(k, "k_512", STACK_1, 1, p);
    
    ec_alloc(E, k);
    ec_init(E, k);
    
    char seed[41];
 
    char bad_seed[41]="ffffffffffffffffffffffffffffffffffffffff";
 
    /* Create random Weietrass curve and test them */
    ec_random(E, "randomCurveWeiertrass", seed, k, WEIERSTRASS, PROJECTIVE, STACK_1);
 
    res1 = ec_verify_random_generation(E, seed, STACK_1);
 
    if(res1==true)
    {
        printf("E: \n"); ec_curve_print(E, 16, STACK_1); printf("\n");
        printf("Weietrass: E was generated from seed:%s\n", seed);
    }
    else
    {
        printf("Problem of creation of the random weierstrass curve \n");
    }
    
    number_free(&p);
    number_free(&n);
    field_free(k);
#if MPHELL_USE_AMNS == 1
    amns_free(&AMNS);
#endif
    ec_free(E);
    free_mphell();
    
}