66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*=============================================================================
|
|
|
|
This file is part of FLINT.
|
|
|
|
FLINT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
FLINT 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with FLINT; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
=============================================================================*/
|
|
/******************************************************************************
|
|
|
|
Copyright (C) 2013 Mike Hansen
|
|
|
|
******************************************************************************/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "flint.h"
|
|
#include "ulong_extras.h"
|
|
|
|
int main(void)
|
|
{
|
|
int i;
|
|
FLINT_TEST_INIT(state);
|
|
|
|
flint_printf("discrete_log_bsgs....");
|
|
fflush(stdout);
|
|
|
|
flint_randinit(state);
|
|
|
|
for (i = 0; i < 1000; i++)
|
|
{
|
|
mp_limb_t p, root, b, d, result;
|
|
double pinv;
|
|
|
|
p = n_randprime(state, 20, 1);
|
|
pinv = n_precompute_inverse(p);
|
|
root = n_primitive_root_prime(p);
|
|
b = n_randint(state, p - 1) + 1;
|
|
d = n_discrete_log_bsgs(b, root, p);
|
|
|
|
result = n_powmod_precomp(root, d, p, pinv);
|
|
|
|
if (result != b)
|
|
{
|
|
flint_printf("FAIL:\n");
|
|
flint_printf("%wu ** (%wu) == %wu != %wu\n", root, d, result, b);
|
|
abort();
|
|
}
|
|
}
|
|
|
|
FLINT_TEST_CLEANUP(state);
|
|
flint_printf("PASS\n");
|
|
return 0;
|
|
|
|
}
|