mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-25 10:08:21 +01:00
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*/
|
|
|
|
#include "avb_kernel_cmdline_descriptor.h"
|
|
#include "avb_util.h"
|
|
|
|
bool avb_kernel_cmdline_descriptor_validate_and_byteswap(
|
|
const AvbKernelCmdlineDescriptor* src, AvbKernelCmdlineDescriptor* dest) {
|
|
uint64_t expected_size;
|
|
|
|
avb_memcpy(dest, src, sizeof(AvbKernelCmdlineDescriptor));
|
|
|
|
if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src,
|
|
(AvbDescriptor*)dest))
|
|
return false;
|
|
|
|
if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_KERNEL_CMDLINE) {
|
|
avb_error("Invalid tag for kernel cmdline descriptor.\n");
|
|
return false;
|
|
}
|
|
|
|
dest->flags = avb_be32toh(dest->flags);
|
|
dest->kernel_cmdline_length = avb_be32toh(dest->kernel_cmdline_length);
|
|
|
|
/* Check that kernel_cmdline is fully contained. */
|
|
expected_size = sizeof(AvbKernelCmdlineDescriptor) - sizeof(AvbDescriptor);
|
|
if (!avb_safe_add_to(&expected_size, dest->kernel_cmdline_length)) {
|
|
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;
|
|
}
|