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#include "testutils.h"
static void
ref_mod (mp_limb_t *rp, const mp_limb_t *ap, const mp_limb_t *mp, mp_size_t mn)
{
mp_limb_t q[mn + 1];
mpn_tdiv_qr (q, rp, 0, ap, 2*mn, mp, mn);
}
#define MAX_ECC_SIZE (1 + 521 / GMP_NUMB_BITS)
#define MAX_SIZE (2*MAX_ECC_SIZE)
#define COUNT 50000
void
test_main (void)
{
gmp_randstate_t state;
mp_limb_t a[MAX_SIZE];
mp_limb_t m[MAX_SIZE];
mp_limb_t ref[MAX_SIZE];
unsigned i;
mpz_t r;
gmp_randinit_default (state);
mpz_init (r);
for (i = 0; ecc_curves[i]; i++)
{
const struct ecc_curve *ecc = ecc_curves[i];
unsigned j;
for (j = 0; j < COUNT; j++)
{
if (j & 1)
mpz_rrandomb (r, state, 2*ecc->size * GMP_NUMB_BITS);
else
mpz_urandomb (r, state, 2*ecc->size * GMP_NUMB_BITS);
mpz_limbs_copy (a, r, 2*ecc->size);
ref_mod (ref, a, ecc->p, ecc->size);
mpn_copyi (m, a, 2*ecc->size);
ecc->modp (ecc, m);
if (mpn_cmp (m, ecc->p, ecc->size) >= 0)
mpn_sub_n (m, m, ecc->p, ecc->size);
if (mpn_cmp (m, ref, ecc->size))
{
fprintf (stderr, "ecc->modp failed: bit_size = %u\n",
ecc->bit_size);
gmp_fprintf (stderr, "a = %Nx\n", a, 2*ecc->size);
gmp_fprintf (stderr, "m = %Nx (bad)\n", m, ecc->size);
gmp_fprintf (stderr, "ref = %Nx\n", ref, ecc->size);
abort ();
}
if (ecc->Bmodp_size < ecc->size)
{
mpn_copyi (m, a, 2*ecc->size);
ecc_generic_modp (ecc, m);
if (mpn_cmp (m, ecc->p, ecc->size) >= 0)
mpn_sub_n (m, m, ecc->p, ecc->size);
if (mpn_cmp (m, ref, ecc->size))
{
fprintf (stderr, "ecc_generic_modp failed: bit_size = %u\n",
ecc->bit_size);
gmp_fprintf (stderr, "a = %Nx\n", a, 2*ecc->size);
gmp_fprintf (stderr, "m = %Nx (bad)\n", m, ecc->size);
gmp_fprintf (stderr, "ref = %Nx\n", ref, ecc->size);
abort ();
}
}
ref_mod (ref, a, ecc->q, ecc->size);
mpn_copyi (m, a, 2*ecc->size);
ecc->modq (ecc, m);
if (mpn_cmp (m, ecc->q, ecc->size) >= 0)
mpn_sub_n (m, m, ecc->q, ecc->size);
if (mpn_cmp (m, ref, ecc->size))
{
fprintf (stderr, "ecc->modq failed: bit_size = %u\n",
ecc->bit_size);
gmp_fprintf (stderr, "a = %Nx\n", a, 2*ecc->size);
gmp_fprintf (stderr, "m = %Nx (bad)\n", m, ecc->size);
gmp_fprintf (stderr, "ref = %Nx\n", ref, ecc->size);
abort ();
}
if (ecc->Bmodp_size < ecc->size)
{
mpn_copyi (m, a, 2*ecc->size);
ecc_generic_modq (ecc, m);
if (mpn_cmp (m, ecc->q, ecc->size) >= 0)
mpn_sub_n (m, m, ecc->q, ecc->size);
if (mpn_cmp (m, ref, ecc->size))
{
fprintf (stderr, "ecc_generic_modp failed: bit_size = %u\n",
ecc->bit_size);
gmp_fprintf (stderr, "a = %Nx\n", a, 2*ecc->size);
gmp_fprintf (stderr, "m = %Nx (bad)\n", m, ecc->size);
gmp_fprintf (stderr, "ref = %Nx\n", ref, ecc->size);
abort ();
}
}
}
}
mpz_clear (r);
gmp_randclear (state);
}
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