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https://github.com/AsahiLinux/u-boot
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Add libavb lib (3rd party library from AOSP), that implements support of AVB 2.0. This library is used for integrity checking of Android partitions on eMMC. libavb was added as it is and minimal changes were introduced to reduce maintenance cost, because it will be deviated from AOSP upstream in the future. Changes: - license headers changed to conform SPDX-style - avb_crc32.c dropped - updates in avb_sysdeps_posix.c/avb_sysdeps.h For additional details check [1] AVB 2.0 README. [1] https://android.googlesource.com/platform/external/avb/+/master/README.md Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* SPDX-License-Identifier: MIT
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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_HASHTREE_DESCRIPTOR_H_
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#define AVB_HASHTREE_DESCRIPTOR_H_
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#include "avb_descriptor.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Flags for hashtree descriptors.
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*
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* AVB_HASHTREE_DESCRIPTOR_FLAGS_DO_NOT_USE_AB: Do not apply the default A/B
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* partition logic to this partition. This is intentionally a negative boolean
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* because A/B should be both the default and most used in practice.
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*/
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typedef enum {
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AVB_HASHTREE_DESCRIPTOR_FLAGS_DO_NOT_USE_AB = (1 << 0),
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} AvbHashtreeDescriptorFlags;
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/* A descriptor containing information about a dm-verity hashtree.
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*
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* Hash-trees are used to verify large partitions typically containing
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* file systems. See
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* https://gitlab.com/cryptsetup/cryptsetup/wikis/DMVerity for more
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* information about dm-verity.
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*
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* Following this struct are |partition_name_len| bytes of the
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* partition name (UTF-8 encoded), |salt_len| bytes of salt, and then
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* |root_digest_len| bytes of the root digest.
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*
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* The |reserved| field is for future expansion and must be set to NUL
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* bytes.
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*
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* Changes in v1.1:
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* - flags field is added which supports AVB_HASHTREE_DESCRIPTOR_FLAGS_USE_AB
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* - digest_len may be zero, which indicates the use of a persistent digest
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*/
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typedef struct AvbHashtreeDescriptor {
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AvbDescriptor parent_descriptor;
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uint32_t dm_verity_version;
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uint64_t image_size;
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uint64_t tree_offset;
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uint64_t tree_size;
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uint32_t data_block_size;
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uint32_t hash_block_size;
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uint32_t fec_num_roots;
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uint64_t fec_offset;
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uint64_t fec_size;
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uint8_t hash_algorithm[32];
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uint32_t partition_name_len;
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uint32_t salt_len;
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uint32_t root_digest_len;
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uint32_t flags;
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uint8_t reserved[60];
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} AVB_ATTR_PACKED AvbHashtreeDescriptor;
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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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* Data following the struct is not validated nor copied.
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*/
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bool avb_hashtree_descriptor_validate_and_byteswap(
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const AvbHashtreeDescriptor* src,
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AvbHashtreeDescriptor* dest) 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_HASHTREE_DESCRIPTOR_H_ */
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