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/*
This file is part of GNUnet.
Copyright (C) 2015 Christian Grothoff (and other contributing authors)
GNUnet 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 3, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file util/test_crypto_ecc_dlog.c
* @brief testcase for ECC DLOG calculation
* @author Christian Grothoff
*
* TODO:
* - test negative numbers
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include <gcrypt.h>
/**
* Name of the curve we are using. Note that we have hard-coded
* structs that use 256 bits, so using a bigger curve will require
* changes that break stuff badly. The name of the curve given here
* must be agreed by all peers and be supported by libgcrypt.
*/
#define CURVE "Ed25519"
/**
* Maximum value we test dlog for.
*/
#define MAX_FACT 1000000
/**
* Maximum memory to use, sqrt(MAX_FACT) is a good choice.
*/
#define MAX_MEM 1000
static void
test_dlog (struct GNUNET_CRYPTO_EccDlogContext *edc)
{
gcry_mpi_t fact;
gcry_ctx_t ctx;
gcry_mpi_point_t q;
gcry_mpi_point_t g;
unsigned int i;
unsigned int x;
GNUNET_assert (0 == gcry_mpi_ec_new (&ctx, NULL, CURVE));
g = gcry_mpi_ec_get_point ("g", ctx, 0);
GNUNET_assert (NULL != g);
q = gcry_mpi_point_new (0);
fact = gcry_mpi_new (0);
for (i=0;i<10;i++)
{
x = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
MAX_FACT);
gcry_mpi_set_ui (fact, x);
gcry_mpi_ec_mul (q, fact, g, ctx);
if (x !=
GNUNET_CRYPTO_ecc_dlog (edc,
q))
{
fprintf (stderr,
"DLOG failed for value %u\n",
x);
GNUNET_assert (0);
}
}
gcry_mpi_release (fact);
gcry_mpi_point_release (g);
gcry_mpi_point_release (q);
gcry_ctx_release (ctx);
}
int
main (int argc, char *argv[])
{
struct GNUNET_CRYPTO_EccDlogContext *edc;
if (! gcry_check_version ("1.6.0"))
{
FPRINTF (stderr,
_
("libgcrypt has not the expected version (version %s is required).\n"),
"1.6.0");
return 0;
}
if (getenv ("GNUNET_GCRYPT_DEBUG"))
gcry_control (GCRYCTL_SET_DEBUG_FLAGS, 1u , 0);
GNUNET_log_setup ("test-crypto-ecc-dlog",
"WARNING",
NULL);
edc = GNUNET_CRYPTO_ecc_dlog_prepare (MAX_FACT,
MAX_MEM);
test_dlog (edc);
GNUNET_CRYPTO_ecc_dlog_release (edc);
return 0;
}
/* end of test_crypto_ecc_dlog.c */
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