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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <stdint.h>
#include <stdlib.h>
#define SHA256_DIGEST_SIZE 32
/* Unoptimized implementation based on FIPS 198. 'res' has to be allocated by
* the caller. Prefer external OpenSSL functions, and use this only when
* linking to OpenSSL is not desirable (eg: libsystemd.so). */
void hmac_sha256(const void *key, size_t key_size, const void *input, size_t input_size, uint8_t res[static SHA256_DIGEST_SIZE]);
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