blob: 913c9181f2d566a6d2797b6178a5fbf79a33ecf7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef HASH_ALGS_H
#define HASH_ALGS_H
#include "util.h"
#include <stdio.h>
struct fsverity_hash_alg {
const char *name;
unsigned int digest_size;
unsigned int block_size;
struct hash_ctx *(*create_ctx)(const struct fsverity_hash_alg *alg);
};
extern const struct fsverity_hash_alg fsverity_hash_algs[];
struct hash_ctx {
const struct fsverity_hash_alg *alg;
void (*init)(struct hash_ctx *ctx);
void (*update)(struct hash_ctx *ctx, const void *data, size_t size);
void (*final)(struct hash_ctx *ctx, u8 *out);
void (*free)(struct hash_ctx *ctx);
};
const struct fsverity_hash_alg *find_hash_alg_by_name(const char *name);
const struct fsverity_hash_alg *find_hash_alg_by_num(unsigned int num);
void show_all_hash_algs(FILE *fp);
/* The hash algorithm that fsverity-utils assumes when none is specified */
#define FS_VERITY_HASH_ALG_DEFAULT FS_VERITY_HASH_ALG_SHA256
/*
* Largest digest size among all hash algorithms supported by fs-verity.
* This can be increased if needed.
*/
#define FS_VERITY_MAX_DIGEST_SIZE 64
static inline struct hash_ctx *hash_create(const struct fsverity_hash_alg *alg)
{
return alg->create_ctx(alg);
}
static inline void hash_init(struct hash_ctx *ctx)
{
ctx->init(ctx);
}
static inline void hash_update(struct hash_ctx *ctx,
const void *data, size_t size)
{
ctx->update(ctx, data, size);
}
static inline void hash_final(struct hash_ctx *ctx, u8 *digest)
{
ctx->final(ctx, digest);
}
static inline void hash_free(struct hash_ctx *ctx)
{
if (ctx)
ctx->free(ctx);
}
void hash_full(struct hash_ctx *ctx, const void *data, size_t size, u8 *digest);
#endif /* HASH_ALGS_H */
|
