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wolfSSL: Get EC generator for DPP

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Signed-off-by: Juliusz Sosinowicz <juliusz@wolfssl.com>
This commit is contained in:
Juliusz Sosinowicz 2023-03-08 18:18:49 +01:00 • committed by Jouni Malinen
parent 732ed5abe1
commit 8dabc1fede
1 changed files with 26 additions and 0 deletions
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26
src/crypto/crypto_wolfssl.c
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@ -1617,6 +1617,9 @@ int ecc_projective_add_point(ecc_point *P, ecc_point *Q, ecc_point *R,
struct crypto_ec { struct crypto_ec {
ecc_key *key; ecc_key *key;
#ifdef CONFIG_DPP
ecc_point *g; /* Only used in DPP for now */
#endif /* CONFIG_DPP */
mp_int a; mp_int a;
mp_int prime; mp_int prime;
mp_int order; mp_int order;
@ -1658,6 +1661,18 @@ struct crypto_ec * crypto_ec_init(int group)
LOG_WOLF_ERROR_FUNC(wc_ecc_set_curve, err); LOG_WOLF_ERROR_FUNC(wc_ecc_set_curve, err);
goto done; goto done;
} }
#ifdef CONFIG_DPP
e->g = wc_ecc_new_point();
if (!e->g) {
LOG_WOLF_ERROR_FUNC_NULL(wc_ecc_new_point);
goto done;
}
err = wc_ecc_get_generator(e->g, wc_ecc_get_curve_idx(curve_id));
if (err != MP_OKAY) {
LOG_WOLF_ERROR_FUNC(wc_ecc_get_generator, err);
goto done;
}
#endif /* CONFIG_DPP */
err = mp_init_multi(&e->a, &e->prime, &e->order, &e->b, NULL, NULL); err = mp_init_multi(&e->a, &e->prime, &e->order, &e->b, NULL, NULL);
if (err != MP_OKAY) { if (err != MP_OKAY) {
LOG_WOLF_ERROR_FUNC(mp_init_multi, err); LOG_WOLF_ERROR_FUNC(mp_init_multi, err);
@ -1708,6 +1723,9 @@ void crypto_ec_deinit(struct crypto_ec* e)
mp_clear(&e->order); mp_clear(&e->order);
mp_clear(&e->prime); mp_clear(&e->prime);
mp_clear(&e->a); mp_clear(&e->a);
#ifdef CONFIG_DPP
wc_ecc_del_point(e->g);
#endif /* CONFIG_DPP */
if (e->own_key) if (e->own_key)
ecc_key_deinit(e->key); ecc_key_deinit(e->key);
os_free(e); os_free(e);
@ -1786,6 +1804,14 @@ void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear)
} }
#ifdef CONFIG_DPP
const struct crypto_ec_point * crypto_ec_get_generator(struct crypto_ec *e)
{
return (const struct crypto_ec_point *) e->g;
}
#endif /* CONFIG_DPP */
int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p, int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p,
struct crypto_bignum *x) struct crypto_bignum *x)
{ {