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/*
* FIPS mode utilities
*
* Copyright (C) 2011-2021 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include "utils_fips.h"
#if !ENABLE_FIPS
int crypt_fips_mode(void) { return 0; }
#else
static int kernel_fips_mode(void)
{
int fd;
char buf[1] = "";
if ((fd = open("/proc/sys/crypto/fips_enabled", O_RDONLY)) >= 0) {
while (read(fd, buf, sizeof(buf)) < 0 && errno == EINTR);
close(fd);
}
return (buf[0] == '1') ? 1 : 0;
}
int crypt_fips_mode(void)
{
return kernel_fips_mode() && !access("/etc/system-fips", F_OK);
}
#endif /* ENABLE_FIPS */
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