/**
* Do some DLOG operations for testing.
*
* @param edc context for ECC operations
* @param do_dlog #GNUNET_YES if we want to actually do the bencharked operation
*/
static void
test_dlog (struct GNUNET_CRYPTO_EccDlogContext *edc,
int do_dlog)
{
gcry_mpi_t fact;
gcry_mpi_t n;
gcry_ctx_t ctx;
gcry_mpi_point_t q;
gcry_mpi_point_t g;
unsigned int i;
int x;
int iret;
GNUNET_assert (0 == gcry_mpi_ec_new (&ctx, NULL, CURVE));
g = gcry_mpi_ec_get_point ("g", ctx, 0);
GNUNET_assert (NULL != g);
n = gcry_mpi_ec_get_mpi ("n", ctx, 0);
q = gcry_mpi_point_new (0);
fact = gcry_mpi_new (0);
for (i=0;i<TEST_ITER;i++)
{
fprintf (stderr, ".");
x = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
MAX_FACT);
if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
2))
{
gcry_mpi_set_ui (fact, x);
gcry_mpi_sub (fact, n, fact);
x = - x;
}
else
{
gcry_mpi_set_ui (fact, x);
}
gcry_mpi_ec_mul (q, fact, g, ctx);
if ( (GNUNET_YES == do_dlog) &&
(x !=
(iret = GNUNET_CRYPTO_ecc_dlog (edc,
q))) )
{
fprintf (stderr,
"DLOG failed for value %d (%d)\n",
x,
iret);
GNUNET_assert (0);
}
}
gcry_mpi_release (fact);
gcry_mpi_release (n);
gcry_mpi_point_release (g);
gcry_mpi_point_release (q);
gcry_ctx_release (ctx);
fprintf (stderr, "\n");
}
/**
* Do some arithmetic operations for testing.
*
* @param edc context for ECC operations
*/
static void
test_math (struct GNUNET_CRYPTO_EccDlogContext *edc)
{
int i;
int j;
gcry_mpi_point_t ip;
gcry_mpi_point_t jp;
gcry_mpi_point_t r;
gcry_mpi_point_t ir;
gcry_mpi_point_t irj;
gcry_mpi_point_t r_inv;
gcry_mpi_point_t sum;
for (i=-MATH_MAX;i<MATH_MAX;i++)
{
ip = GNUNET_CRYPTO_ecc_dexp (edc, i);
for (j=-MATH_MAX;j<MATH_MAX;j++)
{
fprintf (stderr, ".");
jp = GNUNET_CRYPTO_ecc_dexp (edc, j);
GNUNET_CRYPTO_ecc_rnd (edc,
&r,
&r_inv);
ir = GNUNET_CRYPTO_ecc_add (edc, ip, r);
irj = GNUNET_CRYPTO_ecc_add (edc, ir, jp);
sum = GNUNET_CRYPTO_ecc_add (edc, irj, r_inv);
GNUNET_assert (i + j ==
GNUNET_CRYPTO_ecc_dlog (edc,
sum));
GNUNET_CRYPTO_ecc_free (jp);
GNUNET_CRYPTO_ecc_free (ir);
GNUNET_CRYPTO_ecc_free (irj);
GNUNET_CRYPTO_ecc_free (r);
GNUNET_CRYPTO_ecc_free (r_inv);
GNUNET_CRYPTO_ecc_free (sum);
}
GNUNET_CRYPTO_ecc_free (ip);
}
fprintf (stderr, "\n");
}
