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1 | /* Declarations of functions and data types used for SHA1 sum | |
2 | library functions. | |
3 | Copyright (C) 2000, 2001, 2003, 2005 Free Software Foundation, Inc. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of the GNU General Public License as published by the | |
7 | Free Software Foundation; either version 2, or (at your option) any | |
8 | later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software Foundation, | |
17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
18 | ||
19 | #ifndef SHA1_H | |
20 | # define SHA1_H 1 | |
21 | ||
22 | # include <stdio.h> | |
23 | # include "md5.h" | |
24 | ||
25 | /* Structure to save state of computation between the single steps. */ | |
26 | struct sha1_ctx | |
27 | { | |
28 | md5_uint32 A; | |
29 | md5_uint32 B; | |
30 | md5_uint32 C; | |
31 | md5_uint32 D; | |
32 | md5_uint32 E; | |
33 | ||
34 | md5_uint32 total[2]; | |
35 | md5_uint32 buflen; | |
36 | char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32)))); | |
37 | }; | |
38 | ||
39 | ||
40 | /* Initialize structure containing state of computation. */ | |
41 | extern void sha1_init_ctx (struct sha1_ctx *ctx); | |
42 | ||
43 | /* Starting with the result of former calls of this function (or the | |
44 | initialization function update the context for the next LEN bytes | |
45 | starting at BUFFER. | |
46 | It is necessary that LEN is a multiple of 64!!! */ | |
47 | extern void sha1_process_block (const void *buffer, size_t len, | |
48 | 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 NOT required that LEN is a multiple of 64. */ | |
54 | extern void sha1_process_bytes (const void *buffer, size_t len, | |
55 | struct sha1_ctx *ctx); | |
56 | ||
57 | /* Process the remaining bytes in the buffer and put result from CTX | |
58 | in first 20 bytes following RESBUF. The result is always in little | |
59 | endian byte order, so that a byte-wise output yields to the wanted | |
60 | ASCII representation of the message digest. | |
61 | ||
62 | IMPORTANT: On some systems it is required that RESBUF be correctly | |
63 | aligned for a 32 bits value. */ | |
64 | extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf); | |
65 | ||
66 | ||
67 | /* Put result from CTX in first 20 bytes following RESBUF. The result is | |
68 | always in little endian byte order, so that a byte-wise output yields | |
69 | to the wanted ASCII representation of the message digest. | |
70 | ||
71 | IMPORTANT: On some systems it is required that RESBUF is correctly | |
72 | aligned for a 32 bits value. */ | |
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 | #endif |