hmac_init
ATTRIBUTE_WARN_UNUSED_RET int hmac_init(hmac_context *ctx, const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type);
ret = hmac_init(&ctx, hmackey, hmackey_len, hash_type); EG(ret, err);
ret = hmac_init(&ctx, hmackey, hmackey_len, hash_type); EG(ret, err);
ret = hmac_init(&hmac_ctx, K, hsize, hash_type); EG(ret, err);
ret = hmac_init(&hmac_ctx, K, hsize, hash_type); EG(ret, err);
ret = hmac_init(&hmac_ctx, K, hsize, hash_type); EG(ret, err);
{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
static OSSL_FUNC_mac_init_fn hmac_init;