xref: /openbmc/u-boot/lib/libavb/avb_sha.h (revision e3963c09)
1 /* SPDX-License-Identifier: MIT */
2 /*
3  * Copyright (C) 2016 The Android Open Source Project
4  */
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
18 extern "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. */
32 typedef struct {
33   uint32_t h[8];
34   uint32_t tot_len;
35   uint32_t len;
36   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. */
41 typedef struct {
42   uint64_t h[8];
43   uint32_t tot_len;
44   uint32_t len;
45   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. */
50 void avb_sha256_init(AvbSHA256Ctx* ctx);
51 
52 /* Updates the SHA-256 context with |len| bytes from |data|. */
53 void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, uint32_t len);
54 
55 /* Returns the SHA-256 digest. */
56 uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
57 
58 /* Initializes the SHA-512 context. */
59 void avb_sha512_init(AvbSHA512Ctx* ctx);
60 
61 /* Updates the SHA-512 context with |len| bytes from |data|. */
62 void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len);
63 
64 /* Returns the SHA-512 digest. */
65 uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT;
66 
67 #ifdef __cplusplus
68 }
69 #endif
70 
71 #endif /* AVB_SHA_H_ */
72