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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#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->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;
}
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