// 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.
  ");
      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.
  ");
      return false;
    }
    if (expected_size > dest->parent_descriptor.num_bytes_following) {
      avb_error("Descriptor payload size overflow.
  ");
      return false;
    }
  
    return true;
  }