utils_fips.c 1.3 KB
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/*
 * FIPS mode utilities
 *
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 * Copyright (C) 2011-2015, Red Hat, Inc. All rights reserved.
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 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
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 *
 * 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.
 */

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Milan Broz committed
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#include <unistd.h>
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#include <fcntl.h>
#include <errno.h>
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#include "utils_fips.h"

#if !ENABLE_FIPS
int crypt_fips_mode(void) { return 0; }
#else
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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;
}
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int crypt_fips_mode(void)
{
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	return kernel_fips_mode() && !access("/etc/system-fips", F_OK);
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}
#endif /* ENABLE_FIPS */