mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 11:13:07 +00:00
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*/
|
|
|
|
#include "avb_hash_descriptor.h"
|
|
#include "avb_util.h"
|
|
|
|
bool avb_hash_descriptor_validate_and_byteswap(const AvbHashDescriptor* src,
|
|
AvbHashDescriptor* dest) {
|
|
uint64_t expected_size;
|
|
|
|
avb_memcpy(dest, src, sizeof(AvbHashDescriptor));
|
|
|
|
if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src,
|
|
(AvbDescriptor*)dest))
|
|
return false;
|
|
|
|
if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_HASH) {
|
|
avb_error("Invalid tag for hash descriptor.\n");
|
|
return false;
|
|
}
|
|
|
|
dest->image_size = avb_be64toh(dest->image_size);
|
|
dest->partition_name_len = avb_be32toh(dest->partition_name_len);
|
|
dest->salt_len = avb_be32toh(dest->salt_len);
|
|
dest->digest_len = avb_be32toh(dest->digest_len);
|
|
dest->flags = avb_be32toh(dest->flags);
|
|
|
|
/* Check that partition_name, salt, and digest are fully contained. */
|
|
expected_size = sizeof(AvbHashDescriptor) - 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->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;
|
|
}
|