wolfSSL: Get EC generator for DPP

Signed-off-by: Juliusz Sosinowicz <juliusz@wolfssl.com>

diff --git a/src/crypto/crypto_wolfssl.c b/src/crypto/crypto_wolfssl.c
index 95c5208a2546364dd478bdfe4e3db5bb4643b76e..35f66abb4f77720eb61be5ba190411958d57c077 100644 (file)
--- a/src/crypto/crypto_wolfssl.c
+++ b/src/crypto/crypto_wolfssl.c
@@ -1617,6 +1617,9 @@ int ecc_projective_add_point(ecc_point *P, ecc_point *Q, ecc_point *R,
 
 struct crypto_ec {
        ecc_key *key;
+#ifdef CONFIG_DPP
+       ecc_point *g; /* Only used in DPP for now */
+#endif /* CONFIG_DPP */
        mp_int a;
        mp_int prime;
        mp_int order;
@@ -1658,6 +1661,18 @@ struct crypto_ec * crypto_ec_init(int group)
                LOG_WOLF_ERROR_FUNC(wc_ecc_set_curve, err);
                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);
        if (err != MP_OKAY) {
                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->prime);
        mp_clear(&e->a);
+#ifdef CONFIG_DPP
+       wc_ecc_del_point(e->g);
+#endif /* CONFIG_DPP */
        if (e->own_key)
                ecc_key_deinit(e->key);
        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,
                      struct crypto_bignum *x)
 {