// SPDX-License-Identifier: MIT
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/*
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* Copyright (C) 2016 The Android Open Source Project
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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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