mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 14:53:06 +00:00
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*/
|
|
|
|
#include "avb_hashtree_descriptor.h"
|
|
#include "avb_util.h"
|
|
|
|
bool avb_hashtree_descriptor_validate_and_byteswap(
|
|
const AvbHashtreeDescriptor* src, AvbHashtreeDescriptor* dest) {
|
|
uint64_t expected_size;
|
|
|
|
avb_memcpy(dest, src, sizeof(AvbHashtreeDescriptor));
|
|
|
|
if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src,
|
|
(AvbDescriptor*)dest))
|
|
return false;
|
|
|
|
if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_HASHTREE) {
|
|
avb_error("Invalid tag for hashtree descriptor.\n");
|
|
return false;
|
|
}
|
|
|
|
dest->dm_verity_version = avb_be32toh(dest->dm_verity_version);
|
|
dest->image_size = avb_be64toh(dest->image_size);
|
|
dest->tree_offset = avb_be64toh(dest->tree_offset);
|
|
dest->tree_size = avb_be64toh(dest->tree_size);
|
|
dest->data_block_size = avb_be32toh(dest->data_block_size);
|
|
dest->hash_block_size = avb_be32toh(dest->hash_block_size);
|
|
dest->fec_num_roots = avb_be32toh(dest->fec_num_roots);
|
|
dest->fec_offset = avb_be64toh(dest->fec_offset);
|
|
dest->fec_size = avb_be64toh(dest->fec_size);
|
|
dest->partition_name_len = avb_be32toh(dest->partition_name_len);
|
|
dest->salt_len = avb_be32toh(dest->salt_len);
|
|
dest->root_digest_len = avb_be32toh(dest->root_digest_len);
|
|
dest->flags = avb_be32toh(dest->flags);
|
|
|
|
/* Check that partition_name, salt, and root_digest are fully contained. */
|
|
expected_size = sizeof(AvbHashtreeDescriptor) - sizeof(AvbDescriptor);
|
|
if (!avb_safe_add_to(&expected_size, dest->partition_name_len) ||
|
|
!avb_safe_add_to(&expected_size, dest->salt_len) ||
|
|
!avb_safe_add_to(&expected_size, dest->root_digest_len)) {
|
|
avb_error("Overflow while adding up sizes.\n");
|
|
return false;
|
|
}
|
|
if (expected_size > dest->parent_descriptor.num_bytes_following) {
|
|
avb_error("Descriptor payload size overflow.\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|