i2o_ECPublicKey
len = i2o_ECPublicKey(cp->u.ecdh.key, NULL);
len = i2o_ECPublicKey(cp->u.ecdh.key, &p);
xlen = i2o_ECPublicKey(ctx->u.eckey, NULL);
xlen = i2o_ECPublicKey(ctx->u.eckey, &p);
len = i2o_ECPublicKey(eckey, NULL);
(void)i2o_ECPublicKey(eckey, &outptr);
return i2o_ECPublicKey(EVP_PKEY_get0_EC_KEY(a), pp);
penclen = i2o_ECPublicKey(ec_key, NULL);
penclen = i2o_ECPublicKey(ec_key, &p);
OSSL_DEPRECATEDIN_3_0 int i2o_ECPublicKey(const EC_KEY *key, unsigned char **out);
return i2o_ECPublicKey(eckey, pder);
pubkey_len = i2o_ECPublicKey(key, &pubkey);