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ssh-generator: generate /etc/issue.d/ with VSOCK ssh info data (#37819)
[thirdparty/systemd.git] / src / basic / hmac.h
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2#pragma once
3
4#include "forward.h"
5#include "sha256.h"
6
7/* Unoptimized implementation based on FIPS 198. 'res' has to be allocated by
8 * the caller. Prefer external OpenSSL functions, and use this only when
9 * linking to OpenSSL is not desirable (eg: libsystemd.so). */
10void hmac_sha256(const void *key, size_t key_size, const void *input, size_t input_size, uint8_t res[static SHA256_DIGEST_SIZE]);