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13c3daa4 LL |
1 | /* Declarations of functions and data types used for SHA1 sum |
2 | library functions. | |
ab422c4d | 3 | Copyright (C) 2000-2001, 2003, 2005-2006, 2008-2013 Free Software |
13c3daa4 LL |
4 | Foundation, Inc. |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 3, or (at your option) any | |
9 | later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
caf8a9b2 | 17 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
13c3daa4 LL |
18 | |
19 | #ifndef SHA1_H | |
20 | # define SHA1_H 1 | |
21 | ||
22 | # include <stdio.h> | |
23 | # include <stdint.h> | |
24 | ||
25 | # ifdef __cplusplus | |
26 | extern "C" { | |
27 | # endif | |
28 | ||
29 | #define SHA1_DIGEST_SIZE 20 | |
30 | ||
31 | /* Structure to save state of computation between the single steps. */ | |
32 | struct sha1_ctx | |
33 | { | |
34 | uint32_t A; | |
35 | uint32_t B; | |
36 | uint32_t C; | |
37 | uint32_t D; | |
38 | uint32_t E; | |
39 | ||
40 | uint32_t total[2]; | |
41 | uint32_t buflen; | |
42 | uint32_t buffer[32]; | |
43 | }; | |
44 | ||
45 | ||
46 | /* Initialize structure containing state of computation. */ | |
47 | extern void sha1_init_ctx (struct sha1_ctx *ctx); | |
48 | ||
49 | /* Starting with the result of former calls of this function (or the | |
50 | initialization function update the context for the next LEN bytes | |
51 | starting at BUFFER. | |
52 | It is necessary that LEN is a multiple of 64!!! */ | |
53 | extern void sha1_process_block (const void *buffer, size_t len, | |
54 | struct sha1_ctx *ctx); | |
55 | ||
56 | /* Starting with the result of former calls of this function (or the | |
57 | initialization function update the context for the next LEN bytes | |
58 | starting at BUFFER. | |
59 | It is NOT required that LEN is a multiple of 64. */ | |
60 | extern void sha1_process_bytes (const void *buffer, size_t len, | |
61 | struct sha1_ctx *ctx); | |
62 | ||
63 | /* Process the remaining bytes in the buffer and put result from CTX | |
64 | in first 20 bytes following RESBUF. The result is always in little | |
65 | endian byte order, so that a byte-wise output yields to the wanted | |
66 | ASCII representation of the message digest. */ | |
67 | extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); | |
68 | ||
69 | ||
70 | /* Put result from CTX in first 20 bytes following RESBUF. The result is | |
71 | always in little endian byte order, so that a byte-wise output yields | |
72 | to the wanted ASCII representation of the message digest. */ | |
73 | extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); | |
74 | ||
75 | ||
76 | /* Compute SHA1 message digest for bytes read from STREAM. The | |
77 | resulting message digest number will be written into the 20 bytes | |
78 | beginning at RESBLOCK. */ | |
79 | extern int sha1_stream (FILE *stream, void *resblock); | |
80 | ||
81 | /* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The | |
82 | result is always in little endian byte order, so that a byte-wise | |
83 | output yields to the wanted ASCII representation of the message | |
84 | digest. */ | |
85 | extern void *sha1_buffer (const char *buffer, size_t len, void *resblock); | |
86 | ||
87 | # ifdef __cplusplus | |
88 | } | |
89 | # endif | |
90 | ||
91 | #endif |