pqc/external/flint-2.4.3/fmpz/test/t-powm.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
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) 2009 William Hart
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "fmpz.h"
int
main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("powm....");
fflush(stdout);
/* Compare with MPIR */
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
fmpz_t a, b, c;
mpz_t d, e, f, m;
fmpz_t x;
mpz_t y;
fmpz_init(a);
fmpz_init(b);
fmpz_init(c);
fmpz_init(x);
mpz_init(d);
mpz_init(e);
mpz_init(f);
mpz_init(m);
mpz_init(y);
fmpz_randtest(a, state, 200);
fmpz_randtest_not_zero(c, state, 200);
fmpz_abs(c, c);
fmpz_get_mpz(d, a);
fmpz_get_mpz(m, c);
fmpz_randtest_unsigned(x, state, 20);
fmpz_get_mpz(y, x);
fmpz_powm(b, a, x, c);
mpz_powm(e, d, y, m);
fmpz_get_mpz(f, b);
result = (mpz_cmp(e, f) == 0);
if (!result)
{
flint_printf("FAIL (cmp f with MPIR e := d^y mod m):\n");
gmp_printf("d = %Zd, e = %Zd, f = %Zd, y = %Zd, m = %Zd\n", d, e, f, y, m);
abort();
}
fmpz_clear(a);
fmpz_clear(b);
fmpz_clear(c);
fmpz_clear(x);
mpz_clear(d);
mpz_clear(e);
mpz_clear(f);
mpz_clear(m);
mpz_clear(y);
}
/* Check aliasing of a and b */
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
fmpz_t a, b, c;
fmpz_t n;
fmpz_init(a);
fmpz_init(b);
fmpz_init(c);
fmpz_init(n);
fmpz_randtest(b, state, 200);
fmpz_randtest_not_zero(c, state, 200);
fmpz_abs(c, c);
fmpz_randtest_unsigned(n, state, 20);
fmpz_powm(a, b, n, c);
fmpz_powm(b, b, n, c);
result = (fmpz_equal(a, b));
if (!result)
{
flint_printf("FAIL (alias a and b):\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("b = "), fmpz_print(b), flint_printf("\n");
flint_printf("c = "), fmpz_print(c), flint_printf("\n");
flint_printf("n = "), fmpz_print(n), flint_printf("\n");
abort();
}
fmpz_clear(a);
fmpz_clear(b);
fmpz_clear(c);
fmpz_clear(n);
}
/* Check aliasing of a and c */
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
fmpz_t a, b, c;
fmpz_t n;
fmpz_init(a);
fmpz_init(b);
fmpz_init(c);
fmpz_init(n);
fmpz_randtest(b, state, 200);
fmpz_randtest_not_zero(c, state, 200);
fmpz_abs(c, c);
fmpz_randtest_unsigned(n, state, 20);
fmpz_powm(a, b, n, c);
fmpz_powm(c, b, n, c);
result = (fmpz_equal(a, c));
if (!result)
{
flint_printf("FAIL (alias a and c):\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("b = "), fmpz_print(b), flint_printf("\n");
flint_printf("c = "), fmpz_print(c), flint_printf("\n");
flint_printf("n = "), fmpz_print(n), flint_printf("\n");
abort();
}
fmpz_clear(a);
fmpz_clear(b);
fmpz_clear(c);
fmpz_clear(n);
}
/* Check aliasing of a and {b, c} */
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
{
fmpz_t a, c;
fmpz_t n;
fmpz_init(a);
fmpz_init(c);
fmpz_init(n);
fmpz_randtest_not_zero(c, state, 200);
fmpz_abs(c, c);
fmpz_randtest_unsigned(n, state, 20);
fmpz_powm(a, c, n, c);
fmpz_powm(c, c, n, c);
result = (fmpz_equal(a, c));
if (!result)
{
flint_printf("FAIL (alias a and b,c):\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("c = "), fmpz_print(c), flint_printf("\n");
flint_printf("n = "), fmpz_print(n), flint_printf("\n");
abort();
}
fmpz_clear(a);
fmpz_clear(c);
fmpz_clear(n);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}