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/*
* Copyright (C) 2020 Red Hat
*
* Author: Ondrej Moris
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#include "config.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#define HMAC_SIZE 32
#define HMAC_ALGO GNUTLS_MAC_SHA256
int main(int argc, char *argv[]) {
gnutls_datum_t data = { NULL, 0 };
gnutls_datum_t hex = { NULL, 0 };
uint8_t buffer[HMAC_SIZE];
gnutls_datum_t hmac = { buffer, sizeof(buffer) };
int status = EXIT_FAILURE;
int ret;
if (argc != 2) {
fprintf(stderr, "Usage: %s <file>\n", argv[0]);
goto error;
}
ret = gnutls_load_file(argv[1], &data);
if (ret < 0) {
fprintf(stderr, "Could not load %s: %s\n", argv[1],
gnutls_strerror(ret));
goto error;
}
GNUTLS_FIPS140_SET_LAX_MODE();
ret = gnutls_hmac_fast(HMAC_ALGO, FIPS_KEY, sizeof(FIPS_KEY)-1,
data.data, data.size, buffer);
if (ret < 0) {
fprintf(stderr, "Could not calculate MAC on %s: %s\n", argv[1],
gnutls_strerror(ret));
goto error;
}
GNUTLS_FIPS140_SET_STRICT_MODE();
ret = gnutls_hex_encode2(&hmac, &hex);
if (ret < 0) {
fprintf(stderr, "Could not encode MAC value: %s\n",
gnutls_strerror(ret));
goto error;
}
printf("%s\n", hex.data);
status = EXIT_SUCCESS;
error:
gnutls_free(data.data);
gnutls_free(hex.data);
return status;
}
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