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13c3daa4 LL |
1 | /* Declarations of functions and data types used for SHA1 sum |
2 | library functions. | |
3 | Copyright (C) 2000-2001, 2003, 2005-2006, 2008-2011 Free Software | |
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 | |
17 | along with this program; if not, write to the Free Software Foundation, | |
18 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
19 | ||
20 | #ifndef SHA1_H | |
21 | # define SHA1_H 1 | |
22 | ||
23 | # include <stdio.h> | |
24 | # include <stdint.h> | |
25 | ||
26 | # ifdef __cplusplus | |
27 | extern "C" { | |
28 | # endif | |
29 | ||
30 | #define SHA1_DIGEST_SIZE 20 | |
31 | ||
32 | /* Structure to save state of computation between the single steps. */ | |
33 | struct sha1_ctx | |
34 | { | |
35 | uint32_t A; | |
36 | uint32_t B; | |
37 | uint32_t C; | |
38 | uint32_t D; | |
39 | uint32_t E; | |
40 | ||
41 | uint32_t total[2]; | |
42 | uint32_t buflen; | |
43 | uint32_t buffer[32]; | |
44 | }; | |
45 | ||
46 | ||
47 | /* Initialize structure containing state of computation. */ | |
48 | extern void sha1_init_ctx (struct sha1_ctx *ctx); | |
49 | ||
50 | /* Starting with the result of former calls of this function (or the | |
51 | initialization function update the context for the next LEN bytes | |
52 | starting at BUFFER. | |
53 | It is necessary that LEN is a multiple of 64!!! */ | |
54 | extern void sha1_process_block (const void *buffer, size_t len, | |
55 | struct sha1_ctx *ctx); | |
56 | ||
57 | /* Starting with the result of former calls of this function (or the | |
58 | initialization function update the context for the next LEN bytes | |
59 | starting at BUFFER. | |
60 | It is NOT required that LEN is a multiple of 64. */ | |
61 | extern void sha1_process_bytes (const void *buffer, size_t len, | |
62 | struct sha1_ctx *ctx); | |
63 | ||
64 | /* Process the remaining bytes in the buffer and put result from CTX | |
65 | in first 20 bytes following RESBUF. The result is always in little | |
66 | endian byte order, so that a byte-wise output yields to the wanted | |
67 | ASCII representation of the message digest. */ | |
68 | extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); | |
69 | ||
70 | ||
71 | /* Put result from CTX in first 20 bytes following RESBUF. The result is | |
72 | always in little endian byte order, so that a byte-wise output yields | |
73 | to the wanted ASCII representation of the message digest. */ | |
74 | extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf); | |
75 | ||
76 | ||
77 | /* Compute SHA1 message digest for bytes read from STREAM. The | |
78 | resulting message digest number will be written into the 20 bytes | |
79 | beginning at RESBLOCK. */ | |
80 | extern int sha1_stream (FILE *stream, void *resblock); | |
81 | ||
82 | /* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The | |
83 | result is always in little endian byte order, so that a byte-wise | |
84 | output yields to the wanted ASCII representation of the message | |
85 | digest. */ | |
86 | extern void *sha1_buffer (const char *buffer, size_t len, void *resblock); | |
87 | ||
88 | # ifdef __cplusplus | |
89 | } | |
90 | # endif | |
91 | ||
92 | #endif |