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Tom Rini897a1d92018-06-19 11:21:44 -04001/* SPDX-License-Identifier: MIT */
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +03002/*
3 * Copyright (C) 2016 The Android Open Source Project
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +03004 */
5
6#ifdef AVB_INSIDE_LIBAVB_H
7#error "You can't include avb_sha.h in the public header libavb.h."
8#endif
9
10#ifndef AVB_COMPILATION
11#error "Never include this file, it may only be used from internal avb code."
12#endif
13
14#ifndef AVB_SHA_H_
15#define AVB_SHA_H_
16
17#ifdef __cplusplus
18extern "C" {
19#endif
20
21#include "avb_crypto.h"
22#include "avb_sysdeps.h"
23
24/* Block size in bytes of a SHA-256 digest. */
25#define AVB_SHA256_BLOCK_SIZE 64
26
27
28/* Block size in bytes of a SHA-512 digest. */
29#define AVB_SHA512_BLOCK_SIZE 128
30
31/* Data structure used for SHA-256. */
32typedef struct {
33 uint32_t h[8];
Sam Protsenko4d579a42019-08-15 23:04:02 +030034 uint64_t tot_len;
35 size_t len;
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +030036 uint8_t block[2 * AVB_SHA256_BLOCK_SIZE];
37 uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */
38} AvbSHA256Ctx;
39
40/* Data structure used for SHA-512. */
41typedef struct {
42 uint64_t h[8];
Sam Protsenko4d579a42019-08-15 23:04:02 +030043 uint64_t tot_len;
44 size_t len;
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +030045 uint8_t block[2 * AVB_SHA512_BLOCK_SIZE];
46 uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */
47} AvbSHA512Ctx;
48
49/* Initializes the SHA-256 context. */
50void avb_sha256_init(AvbSHA256Ctx* ctx);
51
52/* Updates the SHA-256 context with |len| bytes from |data|. */
Sam Protsenko4d579a42019-08-15 23:04:02 +030053void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, size_t len);
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +030054
55/* Returns the SHA-256 digest. */
56uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
57
58/* Initializes the SHA-512 context. */
59void avb_sha512_init(AvbSHA512Ctx* ctx);
60
61/* Updates the SHA-512 context with |len| bytes from |data|. */
Sam Protsenko4d579a42019-08-15 23:04:02 +030062void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, size_t len);
Igor Opaniukd8f9d2a2018-06-03 21:56:36 +030063
64/* Returns the SHA-512 digest. */
65uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
66
67#ifdef __cplusplus
68}
69#endif
70
71#endif /* AVB_SHA_H_ */