2018-06-19 15:21:44 +00:00
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/* SPDX-License-Identifier: MIT */
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2018-06-03 18:56:36 +00:00
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*/
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#if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION)
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#error "Never include this file directly, include libavb.h instead."
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#endif
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#ifndef AVB_FOOTER_H_
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#define AVB_FOOTER_H_
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#include "avb_sysdeps.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Magic for the footer. */
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#define AVB_FOOTER_MAGIC "AVBf"
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#define AVB_FOOTER_MAGIC_LEN 4
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/* Size of the footer. */
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#define AVB_FOOTER_SIZE 64
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/* The current footer version used - keep in sync with avbtool. */
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#define AVB_FOOTER_VERSION_MAJOR 1
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#define AVB_FOOTER_VERSION_MINOR 0
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/* The struct used as a footer used on partitions, used to find the
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* AvbVBMetaImageHeader struct. This struct is always stored at the
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* end of a partition.
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*/
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typedef struct AvbFooter {
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/* 0: Four bytes equal to "AVBf" (AVB_FOOTER_MAGIC). */
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uint8_t magic[AVB_FOOTER_MAGIC_LEN];
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/* 4: The major version of the footer struct. */
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uint32_t version_major;
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/* 8: The minor version of the footer struct. */
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uint32_t version_minor;
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/* 12: The original size of the image on the partition. */
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uint64_t original_image_size;
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/* 20: The offset of the |AvbVBMetaImageHeader| struct. */
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uint64_t vbmeta_offset;
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/* 28: The size of the vbmeta block (header + auth + aux blocks). */
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uint64_t vbmeta_size;
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/* 36: Padding to ensure struct is size AVB_FOOTER_SIZE bytes. This
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* must be set to zeroes.
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*/
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uint8_t reserved[28];
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} AVB_ATTR_PACKED AvbFooter;
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/* Copies |src| to |dest| and validates, byte-swapping fields in the
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* process if needed. Returns true if valid, false if invalid.
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*/
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bool avb_footer_validate_and_byteswap(const AvbFooter* src, AvbFooter* dest)
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AVB_ATTR_WARN_UNUSED_RESULT;
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#ifdef __cplusplus
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}
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#endif
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#endif /* AVB_FOOTER_H_ */
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