@@ -5,6 +5,7 @@
#define PATH_LOCKDOWN "/sys/kernel/security/lockdown"
+int tst_secureboot_enabled(void);
int tst_lockdown_enabled(void);
#endif /* TST_LOCKDOWN_H */
@@ -9,14 +9,52 @@
#include "tst_test.h"
#include "tst_safe_macros.h"
#include "tst_safe_stdio.h"
+#include "tst_kconfig.h"
#include "tst_lockdown.h"
+#define EFIVAR_SECUREBOOT "/sys/firmware/efi/efivars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c"
+
+int tst_secureboot_enabled(void)
+{
+ int fd;
+ char data[5];
+
+ if (access(EFIVAR_SECUREBOOT, F_OK)) {
+ tst_res(TINFO, "Efivar FS not available");
+ return -1;
+ }
+
+ fd = open(EFIVAR_SECUREBOOT, O_RDONLY);
+
+ if (fd == -1) {
+ tst_res(TINFO | TERRNO,
+ "Cannot open SecureBoot Efivar sysfile");
+ return -1;
+ } else if (fd < 0) {
+ tst_brk(TBROK | TERRNO, "Invalid open() return value %d", fd);
+ return -1;
+ }
+
+ SAFE_READ(1, fd, data, 5);
+ SAFE_CLOSE(fd);
+ tst_res(TINFO, "SecureBoot: %s", data[4] ? "on" : "off");
+ return data[4];
+}
+
int tst_lockdown_enabled(void)
{
char line[BUFSIZ];
FILE *file;
if (access(PATH_LOCKDOWN, F_OK) != 0) {
+ char flag;
+
+ flag = tst_kconfig_get("CONFIG_EFI_SECURE_BOOT_LOCK_DOWN");
+
+ /* SecureBoot enabled could mean integrity lockdown */
+ if (flag == 'y' && tst_secureboot_enabled() > 0)
+ return 1;
+
tst_res(TINFO, "Unable to determine system lockdown state");
return 0;
}
Also check for SecureBoot status in tst_lockdown_enabled() if the lockdown sysfile is not available/readable and the kernel is configured to enable lockdown automatically under SecureBoot. Signed-off-by: Martin Doucha <mdoucha@suse.cz> --- include/tst_lockdown.h | 1 + lib/tst_lockdown.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+)