1 files changed, 46 insertions, 0 deletions
diff --git a/lib/utils_fips.c b/lib/utils_fips.c
new file mode 100644
index 0000000..4fa22fb
--- /dev/null
+++ b/lib/utils_fips.c
@@ -0,0 +1,46 @@
+/*
+ * 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 */