mirror of
https://github.com/physwizz/a155-U-u1.git
synced 2024-11-19 13:27:49 +00:00
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright 2019 Google LLC
|
|
*/
|
|
#ifndef _INCFS_INTEGRITY_H
|
|
#define _INCFS_INTEGRITY_H
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <crypto/hash.h>
|
|
|
|
#include <uapi/linux/incrementalfs.h>
|
|
|
|
#include "internal.h"
|
|
|
|
#define INCFS_MAX_MTREE_LEVELS 8
|
|
#define INCFS_MAX_HASH_AREA_SIZE (1280 * 1024 * 1024)
|
|
|
|
struct incfs_hash_alg {
|
|
const char *name;
|
|
int digest_size;
|
|
enum incfs_hash_tree_algorithm id;
|
|
|
|
struct crypto_shash *shash;
|
|
};
|
|
|
|
/* Merkle tree structure. */
|
|
struct mtree {
|
|
struct incfs_hash_alg *alg;
|
|
|
|
u8 root_hash[INCFS_MAX_HASH_SIZE];
|
|
|
|
/* Offset of each hash level in the hash area. */
|
|
u32 hash_level_suboffset[INCFS_MAX_MTREE_LEVELS];
|
|
|
|
u32 hash_tree_area_size;
|
|
|
|
/* Number of levels in hash_level_suboffset */
|
|
int depth;
|
|
};
|
|
|
|
struct incfs_hash_alg *incfs_get_hash_alg(enum incfs_hash_tree_algorithm id);
|
|
|
|
struct mtree *incfs_alloc_mtree(struct mem_range signature,
|
|
int data_block_count);
|
|
|
|
void incfs_free_mtree(struct mtree *tree);
|
|
|
|
size_t incfs_get_mtree_depth(enum incfs_hash_tree_algorithm alg, loff_t size);
|
|
|
|
size_t incfs_get_mtree_hash_count(enum incfs_hash_tree_algorithm alg,
|
|
loff_t size);
|
|
|
|
int incfs_calc_digest(struct incfs_hash_alg *alg, struct mem_range data,
|
|
struct mem_range digest);
|
|
|
|
#endif /* _INCFS_INTEGRITY_H */
|