| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #if !defined(AVB_INSIDE_LIBAVB_H) && !defined(AVB_COMPILATION) |
| #error "Never include this file directly, include libavb.h instead." |
| #endif |
| |
| #ifndef AVB_HASHTREE_DESCRIPTOR_H_ |
| #define AVB_HASHTREE_DESCRIPTOR_H_ |
| |
| #include "avb_descriptor.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* A descriptor containing information about a dm-verity hashtree. |
| * |
| * Hash-trees are used to verify large partitions typically containing |
| * file systems. See |
| * https://gitlab.com/cryptsetup/cryptsetup/wikis/DMVerity for more |
| * information about dm-verity. |
| * |
| * Following this struct are |partition_name_len| bytes of the |
| * partition name (UTF-8 encoded), |salt_len| bytes of salt, and then |
| * |root_digest_len| bytes of the root digest. |
| */ |
| typedef struct AvbHashtreeDescriptor { |
| AvbDescriptor parent_descriptor; |
| uint32_t dm_verity_version; |
| uint64_t image_size; |
| uint64_t tree_offset; |
| uint64_t tree_size; |
| uint32_t data_block_size; |
| uint32_t hash_block_size; |
| uint8_t hash_algorithm[32]; |
| uint32_t partition_name_len; |
| uint32_t salt_len; |
| uint32_t root_digest_len; |
| } AVB_ATTR_PACKED AvbHashtreeDescriptor; |
| |
| /* 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_hashtree_descriptor_validate_and_byteswap( |
| const AvbHashtreeDescriptor* src, |
| AvbHashtreeDescriptor* dest) AVB_ATTR_WARN_UNUSED_RESULT; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* AVB_HASHTREE_DESCRIPTOR_H_ */ |