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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_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_MAJOR_VERSION) {
avb_error("No support for footer version.\n");
return false;
}
return true;
}
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