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1 | /* Declaration of functions and data types used for MD5 sum computing |
2 | library functions. | |
3 | Copyright (C) 1995-1997,1999-2005 Free Software Foundation, Inc. | |
4 | ||
5 | NOTE: The canonical source of this file is maintained with the GNU C | |
6 | Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by the | |
10 | Free Software Foundation; either version 2, or (at your option) any | |
11 | later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software Foundation, | |
20 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
21 | ||
22 | #ifndef _MD5_H | |
23 | #define _MD5_H 1 | |
24 | ||
25 | #include <stdio.h> | |
26 | ||
27 | #if HAVE_INTTYPES_H | |
28 | # include <inttypes.h> | |
29 | #endif | |
2df1f269 | 30 | #if HAVE_STDINT_H || _LIBC || defined __UCLIBC__ |
05697ec1 NB |
31 | # include <stdint.h> |
32 | #endif | |
33 | ||
34 | #ifndef __GNUC_PREREQ | |
35 | # if defined __GNUC__ && defined __GNUC_MINOR__ | |
36 | # define __GNUC_PREREQ(maj, min) \ | |
37 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | |
38 | # else | |
39 | # define __GNUC_PREREQ(maj, min) 0 | |
40 | # endif | |
41 | #endif | |
42 | ||
43 | #ifndef __THROW | |
44 | # if defined __cplusplus && __GNUC_PREREQ (2,8) | |
45 | # define __THROW throw () | |
46 | # else | |
47 | # define __THROW | |
48 | # endif | |
49 | #endif | |
50 | ||
51 | #ifndef __attribute__ | |
52 | # if ! __GNUC_PREREQ (2,8) || __STRICT_ANSI__ | |
53 | # define __attribute__(x) | |
54 | # endif | |
55 | #endif | |
56 | ||
57 | #ifndef _LIBC | |
58 | # define __md5_buffer md5_buffer | |
59 | # define __md5_finish_ctx md5_finish_ctx | |
60 | # define __md5_init_ctx md5_init_ctx | |
61 | # define __md5_process_block md5_process_block | |
62 | # define __md5_process_bytes md5_process_bytes | |
63 | # define __md5_read_ctx md5_read_ctx | |
64 | # define __md5_stream md5_stream | |
65 | #endif | |
66 | ||
67 | typedef uint32_t md5_uint32; | |
68 | ||
69 | /* Structure to save state of computation between the single steps. */ | |
70 | struct md5_ctx | |
71 | { | |
72 | md5_uint32 A; | |
73 | md5_uint32 B; | |
74 | md5_uint32 C; | |
75 | md5_uint32 D; | |
76 | ||
77 | md5_uint32 total[2]; | |
78 | md5_uint32 buflen; | |
79 | char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32)))); | |
80 | }; | |
81 | ||
82 | /* | |
83 | * The following three functions are build up the low level used in | |
84 | * the functions `md5_stream' and `md5_buffer'. | |
85 | */ | |
86 | ||
87 | /* Initialize structure containing state of computation. | |
88 | (RFC 1321, 3.3: Step 3) */ | |
89 | extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW; | |
90 | ||
91 | /* Starting with the result of former calls of this function (or the | |
92 | initialization function update the context for the next LEN bytes | |
93 | starting at BUFFER. | |
94 | It is necessary that LEN is a multiple of 64!!! */ | |
95 | extern void __md5_process_block (const void *buffer, size_t len, | |
96 | struct md5_ctx *ctx) __THROW; | |
97 | ||
98 | /* Starting with the result of former calls of this function (or the | |
99 | initialization function update the context for the next LEN bytes | |
100 | starting at BUFFER. | |
101 | It is NOT required that LEN is a multiple of 64. */ | |
102 | extern void __md5_process_bytes (const void *buffer, size_t len, | |
103 | struct md5_ctx *ctx) __THROW; | |
104 | ||
105 | /* Process the remaining bytes in the buffer and put result from CTX | |
106 | in first 16 bytes following RESBUF. The result is always in little | |
107 | endian byte order, so that a byte-wise output yields to the wanted | |
108 | ASCII representation of the message digest. | |
109 | ||
110 | IMPORTANT: On some systems it is required that RESBUF be correctly | |
111 | aligned for a 32 bits value. */ | |
112 | extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW; | |
113 | ||
114 | ||
115 | /* Put result from CTX in first 16 bytes following RESBUF. The result is | |
116 | always in little endian byte order, so that a byte-wise output yields | |
117 | to the wanted ASCII representation of the message digest. | |
118 | ||
119 | IMPORTANT: On some systems it is required that RESBUF is correctly | |
120 | aligned for a 32 bits value. */ | |
121 | extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW; | |
122 | ||
123 | ||
124 | /* Compute MD5 message digest for bytes read from STREAM. The | |
125 | resulting message digest number will be written into the 16 bytes | |
126 | beginning at RESBLOCK. */ | |
127 | extern int __md5_stream (FILE *stream, void *resblock) __THROW; | |
128 | ||
129 | /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The | |
130 | result is always in little endian byte order, so that a byte-wise | |
131 | output yields to the wanted ASCII representation of the message | |
132 | digest. */ | |
133 | extern void *__md5_buffer (const char *buffer, size_t len, | |
134 | void *resblock) __THROW; | |
135 | ||
136 | #endif /* md5.h */ |