/* ECC get key size helper */
int CRYPT_ECC_KeySizeGet(CRYPT_ECC_CTX* ecc)
{
if (ecc == NULL)
return BAD_FUNC_ARG;
return ecc_size((ecc_key*)ecc->holder);
}
void
test_main (void)
{
gmp_randstate_t rands;
mpz_t r;
unsigned i;
gmp_randinit_default (rands);
mpz_init (r);
for (i = 0; ecc_curves[i]; i++)
{
const struct ecc_curve *ecc = ecc_curves[i];
mp_size_t size = ecc_size (ecc);
mp_limb_t *p = xalloc_limbs (ecc_size_j (ecc));
mp_limb_t *q = xalloc_limbs (ecc_size_j (ecc));
mp_limb_t *n = xalloc_limbs (size);
mp_limb_t *scratch = xalloc_limbs (ecc->mul_g_itch);
mpn_zero (n, size);
n[0] = 1;
ecc->mul_g (ecc, p, n, scratch);
ecc->h_to_a (ecc, 0, p, p, scratch);
if (mpn_cmp (p, ecc->g, 2*size != 0))
{
fprintf (stderr, "ecc->mul_g with n = 1 failed.\n");
abort ();
}
for (n[0] = 2; n[0] <= 4; n[0]++)
{
ecc->mul_g (ecc, p, n, scratch);
test_ecc_mul_h (i, n[0], p);
}
/* (order - 1) * g = - g */
mpn_sub_1 (n, ecc->q.m, size, 1);
ecc->mul_g (ecc, p, n, scratch);
ecc->h_to_a (ecc, 0, p, p, scratch);
if (ecc->p.bit_size == 255)
/* For edwards curves, - (x,y ) == (-x, y). FIXME: Swap x and
y, to get identical negation? */
mpn_sub_n (p, ecc->p.m, p, size);
else
mpn_sub_n (p + size, ecc->p.m, p + size, size);
if (mpn_cmp (p, ecc->g, 2*size) != 0)
{
fprintf (stderr, "ecc->mul_g with n = order - 1 failed.\n");
abort ();
}
free (n);
free (p);
free (q);
free (scratch);
}
mpz_clear (r);
gmp_randclear (rands);
}
static void
ecc_scalar_zclear (struct ecc_scalar *s)
{
zeroize_key(s->p, ecc_size(s->ecc)*sizeof(mp_limb_t));
ecc_scalar_clear(s);
}
