/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "avb_footer.h"
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#include "avb_util.h"
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bool avb_footer_validate_and_byteswap(const AvbFooter* src, AvbFooter* dest) {
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avb_memcpy(dest, src, sizeof(AvbFooter));
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dest->version_major = avb_be32toh(dest->version_major);
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dest->version_minor = avb_be32toh(dest->version_minor);
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dest->original_image_size = avb_be64toh(dest->original_image_size);
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dest->vbmeta_offset = avb_be64toh(dest->vbmeta_offset);
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dest->vbmeta_size = avb_be64toh(dest->vbmeta_size);
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/* Check that magic is correct. */
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if (avb_safe_memcmp(dest->magic, AVB_FOOTER_MAGIC, AVB_FOOTER_MAGIC_LEN) !=
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0) {
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avb_error("Footer magic is incorrect.\n");
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return false;
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}
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/* Ensure we don't attempt to access any fields if the footer major
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* version is not supported.
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*/
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if (dest->version_major > AVB_FOOTER_VERSION_MAJOR) {
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avb_error("No support for footer version.\n");
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return false;
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}
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return true;
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}
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