src/boot/efi/secure-boot.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "secure-boot.h"
#include "util.h"

BOOLEAN secure_boot_enabled(void) {
        BOOLEAN secure;
        EFI_STATUS err;

        err = efivar_get_boolean_u8(EFI_GLOBAL_GUID, L"SecureBoot", &secure);

        return !EFI_ERROR(err) && secure;
}

SecureBootMode secure_boot_mode(void) {
        BOOLEAN secure, audit = FALSE, deployed = FALSE, setup = FALSE;
        EFI_STATUS err;

        err = efivar_get_boolean_u8(EFI_GLOBAL_GUID, L"SecureBoot", &secure);
        if (EFI_ERROR(err))
                return SECURE_BOOT_UNSUPPORTED;

        /* We can assume FALSE for all these if they are abscent (AuditMode and
         * DeployedMode may not exist on older firmware). */
        (void) efivar_get_boolean_u8(EFI_GLOBAL_GUID, L"AuditMode", &audit);
        (void) efivar_get_boolean_u8(EFI_GLOBAL_GUID, L"DeployedMode", &deployed);
        (void) efivar_get_boolean_u8(EFI_GLOBAL_GUID, L"SetupMode", &setup);

        return decode_secure_boot_mode(secure, audit, deployed, setup);
}

#ifdef SBAT_DISTRO
static const char sbat[] _used_ _section_(".sbat") =
        "sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md\n"
        SBAT_PROJECT ",1,The systemd Developers," SBAT_PROJECT "," PROJECT_VERSION "," PROJECT_URL "\n"
        SBAT_PROJECT "." SBAT_DISTRO "," STRINGIFY(SBAT_DISTRO_GENERATION) "," SBAT_DISTRO_SUMMARY "," SBAT_DISTRO_PKGNAME "," SBAT_DISTRO_VERSION "," SBAT_DISTRO_URL "\n";
#endif