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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2022 Microsoft Corporation
* Copyright (C) 2024 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/list.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/key_protector.h>
GRUB_MOD_LICENSE ("GPLv3+");
struct grub_key_protector *grub_key_protectors = NULL;
grub_err_t
grub_key_protector_register (struct grub_key_protector *protector)
{
if (protector == NULL || protector->name == NULL || protector->name[0] == '\0')
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid key protector for registration");
if (grub_key_protectors != NULL &&
grub_named_list_find (GRUB_AS_NAMED_LIST (grub_key_protectors), protector->name) != NULL)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Key protector '%s' already registered", protector->name);
grub_list_push (GRUB_AS_LIST_P (&grub_key_protectors), GRUB_AS_LIST (protector));
return GRUB_ERR_NONE;
}
grub_err_t
grub_key_protector_unregister (struct grub_key_protector *protector)
{
if (protector == NULL)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid key protector for unregistration");
grub_list_remove (GRUB_AS_LIST (protector));
return GRUB_ERR_NONE;
}
grub_err_t
grub_key_protector_recover_key (const char *protector, grub_uint8_t **key,
grub_size_t *key_size)
{
struct grub_key_protector *kp = NULL;
if (grub_key_protectors == NULL)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "No key protector registered");
if (protector == NULL || protector[0] == '\0')
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Invalid key protector");
kp = grub_named_list_find (GRUB_AS_NAMED_LIST (grub_key_protectors), protector);
if (kp == NULL)
return grub_error (GRUB_ERR_OUT_OF_RANGE, "Key protector '%s' not found", protector);
return kp->recover_key (key, key_size);
}
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