nettle  3.7.3
About: Nettle is a low-level cryptographic library.
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sha1.h
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1 /* sha1.h
2 
3  The sha1 hash function.
4 
5  Copyright (C) 2001, 2012 Niels Möller
6 
7  This file is part of GNU Nettle.
8 
9  GNU Nettle is free software: you can redistribute it and/or
10  modify it under the terms of either:
11 
12  * the GNU Lesser General Public License as published by the Free
13  Software Foundation; either version 3 of the License, or (at your
14  option) any later version.
15 
16  or
17 
18  * the GNU General Public License as published by the Free
19  Software Foundation; either version 2 of the License, or (at your
20  option) any later version.
21 
22  or both in parallel, as here.
23 
24  GNU Nettle is distributed in the hope that it will be useful,
25  but WITHOUT ANY WARRANTY; without even the implied warranty of
26  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27  General Public License for more details.
28 
29  You should have received copies of the GNU General Public License and
30  the GNU Lesser General Public License along with this program. If
31  not, see http://www.gnu.org/licenses/.
32 */
33 
34 #ifndef NETTLE_SHA1_H_INCLUDED
35 #define NETTLE_SHA1_H_INCLUDED
36 
37 #include "nettle-types.h"
38 
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42 
43 /* Name mangling */
44 #define sha1_init nettle_sha1_init
45 #define sha1_update nettle_sha1_update
46 #define sha1_digest nettle_sha1_digest
47 
48 /* SHA1 */
49 
50 #define SHA1_DIGEST_SIZE 20
51 #define SHA1_BLOCK_SIZE 64
52 /* For backwards compatibility */
53 #define SHA1_DATA_SIZE SHA1_BLOCK_SIZE
54 
55 /* Digest is kept internally as 5 32-bit words. */
56 #define _SHA1_DIGEST_LENGTH 5
57 
58 struct sha1_ctx
59 {
60  uint32_t state[_SHA1_DIGEST_LENGTH]; /* State variables */
61  uint64_t count; /* 64-bit block count */
62  unsigned int index; /* index into buffer */
63  uint8_t block[SHA1_BLOCK_SIZE]; /* SHA1 data buffer */
64 };
65 
66 void
67 sha1_init(struct sha1_ctx *ctx);
68 
69 void
70 sha1_update(struct sha1_ctx *ctx,
71  size_t length,
72  const uint8_t *data);
73 
74 void
75 sha1_digest(struct sha1_ctx *ctx,
76  size_t length,
77  uint8_t *digest);
78 
79 /* Internal compression function. STATE points to 5 uint32_t words,
80  and DATA points to 64 bytes of input data, possibly unaligned. */
81 void
82 nettle_sha1_compress(uint32_t *state, const uint8_t *data);
83 
84 #define _nettle_sha1_compress nettle_sha1_compress
85 
86 #ifdef __cplusplus
87 }
88 #endif
89 
90 #endif /* NETTLE_SHA1_H_INCLUDED */
#define _SHA1_DIGEST_LENGTH
Definition: sha1.h:56
#define sha1_init
Definition: sha1.h:44
#define SHA1_BLOCK_SIZE
Definition: sha1.h:51
void nettle_sha1_compress(uint32_t *state, const uint8_t *data)
Definition: fat-arm.c:264
#define sha1_digest
Definition: sha1.h:46
#define sha1_update
Definition: sha1.h:45
Definition: sha1.h:59
uint8_t block[64]
Definition: sha1.h:63
uint64_t count
Definition: sha1.h:61
uint32_t state[5]
Definition: sha1.h:60
unsigned int index
Definition: sha1.h:62