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/*
* Copyright (C) 2016 The Android Open Source Project
*
* SPDX-License-Identifier: MIT
*/
#include "avb_footer.h"
#include "avb_util.h"
bool avb_footer_validate_and_byteswap(const AvbFooter* src, AvbFooter* dest) {
avb_memcpy(dest, src, sizeof(AvbFooter));
dest->version_major = avb_be32toh(dest->version_major);
dest->version_minor = avb_be32toh(dest->version_minor);
dest->original_image_size = avb_be64toh(dest->original_image_size);
dest->vbmeta_offset = avb_be64toh(dest->vbmeta_offset);
dest->vbmeta_size = avb_be64toh(dest->vbmeta_size);
/* Check that magic is correct. */
if (avb_safe_memcmp(dest->magic, AVB_FOOTER_MAGIC, AVB_FOOTER_MAGIC_LEN) !=
0) {
avb_error("Footer magic is incorrect.\n");
return false;
}
/* Ensure we don't attempt to access any fields if the footer major
* version is not supported.
*/
if (dest->version_major > AVB_FOOTER_VERSION_MAJOR) {
avb_error("No support for footer version.\n");
return false;
}
return true;
}
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