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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2020 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <grub/dl.h>
#include <grub/env.h>
#include <grub/file.h>
#include <grub/lockdown.h>
#include <grub/verify.h>
static int lockdown = GRUB_LOCKDOWN_DISABLED;
static grub_err_t
lockdown_verifier_init (grub_file_t io __attribute__ ((unused)),
enum grub_file_type type,
void **context __attribute__ ((unused)),
enum grub_verify_flags *flags)
{
*flags = GRUB_VERIFY_FLAGS_SKIP_VERIFICATION;
switch (type & GRUB_FILE_TYPE_MASK)
{
case GRUB_FILE_TYPE_GRUB_MODULE:
case GRUB_FILE_TYPE_LINUX_KERNEL:
case GRUB_FILE_TYPE_MULTIBOOT_KERNEL:
case GRUB_FILE_TYPE_XEN_HYPERVISOR:
case GRUB_FILE_TYPE_BSD_KERNEL:
case GRUB_FILE_TYPE_XNU_KERNEL:
case GRUB_FILE_TYPE_PLAN9_KERNEL:
case GRUB_FILE_TYPE_NTLDR:
case GRUB_FILE_TYPE_TRUECRYPT:
case GRUB_FILE_TYPE_FREEDOS:
case GRUB_FILE_TYPE_PXECHAINLOADER:
case GRUB_FILE_TYPE_PCCHAINLOADER:
case GRUB_FILE_TYPE_COREBOOT_CHAINLOADER:
case GRUB_FILE_TYPE_EFI_CHAINLOADED_IMAGE:
case GRUB_FILE_TYPE_ACPI_TABLE:
case GRUB_FILE_TYPE_DEVICE_TREE_IMAGE:
case GRUB_FILE_TYPE_FONT:
*flags = GRUB_VERIFY_FLAGS_DEFER_AUTH;
/* Fall through. */
default:
return GRUB_ERR_NONE;
}
}
struct grub_file_verifier lockdown_verifier =
{
.name = "lockdown_verifier",
.init = lockdown_verifier_init,
};
void
grub_lockdown (void)
{
lockdown = GRUB_LOCKDOWN_ENABLED;
grub_verifier_register (&lockdown_verifier);
grub_env_set ("lockdown", "y");
grub_env_export ("lockdown");
}
int
grub_is_lockdown (void)
{
return lockdown;
}
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