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