mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 15:23:07 +00:00
897a1d947e
Signed-off-by: Tom Rini <trini@konsulko.com>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*/
|
|
|
|
#include "avb_chain_partition_descriptor.h"
|
|
#include "avb_util.h"
|
|
|
|
bool avb_chain_partition_descriptor_validate_and_byteswap(
|
|
const AvbChainPartitionDescriptor* src, AvbChainPartitionDescriptor* dest) {
|
|
uint64_t expected_size;
|
|
|
|
avb_memcpy(dest, src, sizeof(AvbChainPartitionDescriptor));
|
|
|
|
if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src,
|
|
(AvbDescriptor*)dest))
|
|
return false;
|
|
|
|
if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_CHAIN_PARTITION) {
|
|
avb_error("Invalid tag for chain partition descriptor.\n");
|
|
return false;
|
|
}
|
|
|
|
dest->rollback_index_location = avb_be32toh(dest->rollback_index_location);
|
|
dest->partition_name_len = avb_be32toh(dest->partition_name_len);
|
|
dest->public_key_len = avb_be32toh(dest->public_key_len);
|
|
|
|
if (dest->rollback_index_location < 1) {
|
|
avb_error("Invalid rollback index location value.\n");
|
|
return false;
|
|
}
|
|
|
|
/* Check that partition_name and public_key are fully contained. */
|
|
expected_size = sizeof(AvbChainPartitionDescriptor) - sizeof(AvbDescriptor);
|
|
if (!avb_safe_add_to(&expected_size, dest->partition_name_len) ||
|
|
!avb_safe_add_to(&expected_size, dest->public_key_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;
|
|
}
|