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// SPDX-License-Identifier: GPL-2.0-or-later
#define TST_NO_DEFAULT_MAIN
#define PATH_LOCKDOWN "/sys/kernel/security/lockdown"
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h>
#include "tst_test.h"
#include "tst_safe_macros.h"
#include "tst_safe_stdio.h"
#include "tst_lockdown.h"
#include "tst_private.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;
}
file = SAFE_FOPEN(PATH_LOCKDOWN, "r");
if (!fgets(line, sizeof(line), file))
tst_brk(TBROK | TERRNO, "fgets %s", PATH_LOCKDOWN);
SAFE_FCLOSE(file);
return (strstr(line, "[none]") == NULL);
}
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