src/basic/hmac.h

   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). */
  10 void hmac_sha256(const void *key, size_t key_size, const void *input, size_t input_size, uint8_t res[static SHA256_DIGEST_SIZE]);