| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * SPDX-License-Identifier: MIT |
| */ |
| |
| #if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION) |
| #error "Never include this file directly, include libavb.h instead." |
| #endif |
| |
| #ifndef AVB_HASH_DESCRIPTOR_H_ |
| #define AVB_HASH_DESCRIPTOR_H_ |
| |
| #include "avb_descriptor.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* Flags for hash descriptors. |
| * |
| * AVB_HASH_DESCRIPTOR_FLAGS_DO_NOT_USE_AB: Do not apply the default A/B |
| * partition logic to this partition. This is intentionally a negative boolean |
| * because A/B should be both the default and most used in practice. |
| */ |
| typedef enum { |
| AVB_HASH_DESCRIPTOR_FLAGS_DO_NOT_USE_AB = (1 << 0), |
| } AvbHashDescriptorFlags; |
| |
| /* A descriptor containing information about hash for an image. |
| * |
| * This descriptor is typically used for boot partitions to verify the |
| * entire kernel+initramfs image before executing it. |
| * |
| * Following this struct are |partition_name_len| bytes of the |
| * partition name (UTF-8 encoded), |salt_len| bytes of salt, and then |
| * |digest_len| bytes of the digest. |
| * |
| * The |reserved| field is for future expansion and must be set to NUL |
| * bytes. |
| * |
| * Changes in v1.1: |
| * - flags field is added which supports AVB_HASH_DESCRIPTOR_FLAGS_USE_AB |
| * - digest_len may be zero, which indicates the use of a persistent digest |
| */ |
| typedef struct AvbHashDescriptor { |
| AvbDescriptor parent_descriptor; |
| uint64_t image_size; |
| uint8_t hash_algorithm[32]; |
| uint32_t partition_name_len; |
| uint32_t salt_len; |
| uint32_t digest_len; |
| uint32_t flags; |
| uint8_t reserved[60]; |
| } AVB_ATTR_PACKED AvbHashDescriptor; |
| |
| /* Copies |src| to |dest| and validates, byte-swapping fields in the |
| * process if needed. Returns true if valid, false if invalid. |
| * |
| * Data following the struct is not validated nor copied. |
| */ |
| bool avb_hash_descriptor_validate_and_byteswap(const AvbHashDescriptor* src, |
| AvbHashDescriptor* dest) |
| AVB_ATTR_WARN_UNUSED_RESULT; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* AVB_HASH_DESCRIPTOR_H_ */ |