]>
Commit | Line | Data |
---|---|---|
b13927da UD |
1 | /* Declaration of functions and data types used for MD5 sum computing |
2 | library functions. | |
04277e02 | 3 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
68dbb3a6 UD |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
68dbb3a6 UD |
10 | |
11 | The GNU C Library 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 GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
68dbb3a6 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
68dbb3a6 UD |
19 | |
20 | #ifndef _MD5_H | |
21 | #define _MD5_H 1 | |
22 | ||
23 | #include <stdio.h> | |
24 | ||
ceaa9889 | 25 | #if defined HAVE_LIMITS_H || defined _LIBC |
68dbb3a6 UD |
26 | # include <limits.h> |
27 | #endif | |
28 | ||
d91c4c2e RM |
29 | #define MD5_DIGEST_SIZE 16 |
30 | #define MD5_BLOCK_SIZE 64 | |
31 | ||
68dbb3a6 UD |
32 | /* The following contortions are an attempt to use the C preprocessor |
33 | to determine an unsigned integral type that is 32 bits wide. An | |
34 | alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but | |
35 | doing that would require that the configure script compile and *run* | |
36 | the resulting executable. Locally running cross-compiled executables | |
37 | is usually not possible. */ | |
38 | ||
39 | #ifdef _LIBC | |
35d30630 UD |
40 | # include <stdint.h> |
41 | typedef uint32_t md5_uint32; | |
42 | typedef uintptr_t md5_uintptr; | |
68dbb3a6 | 43 | #else |
965a54a4 | 44 | # define UINT_MAX_32_BITS 4294967295U |
68dbb3a6 UD |
45 | |
46 | /* If UINT_MAX isn't defined, assume it's a 32-bit type. | |
47 | This should be valid for all systems GNU cares about because | |
48 | that doesn't include 16-bit systems, and only modern systems | |
49 | (that certainly have <limits.h>) have 64+-bit integral types. */ | |
50 | ||
51 | # ifndef UINT_MAX | |
52 | # define UINT_MAX UINT_MAX_32_BITS | |
53 | # endif | |
54 | ||
55 | # if UINT_MAX == UINT_MAX_32_BITS | |
56 | typedef unsigned int md5_uint32; | |
57 | # else | |
58 | # if USHRT_MAX == UINT_MAX_32_BITS | |
59 | typedef unsigned short md5_uint32; | |
60 | # else | |
61 | # if ULONG_MAX == UINT_MAX_32_BITS | |
62 | typedef unsigned long md5_uint32; | |
63 | # else | |
64 | /* The following line is intended to evoke an error. | |
7dc6bd90 | 65 | Using #error is not portable enough. */ |
68dbb3a6 UD |
66 | "Cannot determine unsigned 32-bit data type." |
67 | # endif | |
68 | # endif | |
69 | # endif | |
35d30630 UD |
70 | /* We have to make a guess about the integer type equivalent in size |
71 | to pointers which should always be correct. */ | |
72 | typedef unsigned long int md5_uintptr; | |
68dbb3a6 UD |
73 | #endif |
74 | ||
68dbb3a6 UD |
75 | /* Structure to save state of computation between the single steps. */ |
76 | struct md5_ctx | |
77 | { | |
78 | md5_uint32 A; | |
79 | md5_uint32 B; | |
80 | md5_uint32 C; | |
81 | md5_uint32 D; | |
82 | ||
83 | md5_uint32 total[2]; | |
84 | md5_uint32 buflen; | |
7dc6bd90 UD |
85 | union |
86 | { | |
87 | char buffer[128]; | |
88 | md5_uint32 buffer32[32]; | |
89 | }; | |
68dbb3a6 UD |
90 | }; |
91 | ||
92 | /* | |
93 | * The following three functions are build up the low level used in | |
94 | * the functions `md5_stream' and `md5_buffer'. | |
95 | */ | |
96 | ||
97 | /* Initialize structure containing state of computation. | |
98 | (RFC 1321, 3.3: Step 3) */ | |
79937577 | 99 | extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW; |
68dbb3a6 UD |
100 | |
101 | /* Starting with the result of former calls of this function (or the | |
102 | initialization function update the context for the next LEN bytes | |
103 | starting at BUFFER. | |
104 | It is necessary that LEN is a multiple of 64!!! */ | |
79937577 UD |
105 | extern void __md5_process_block (const void *buffer, size_t len, |
106 | struct md5_ctx *ctx) __THROW; | |
68dbb3a6 UD |
107 | |
108 | /* Starting with the result of former calls of this function (or the | |
109 | initialization function update the context for the next LEN bytes | |
110 | starting at BUFFER. | |
111 | It is NOT required that LEN is a multiple of 64. */ | |
79937577 UD |
112 | extern void __md5_process_bytes (const void *buffer, size_t len, |
113 | struct md5_ctx *ctx) __THROW; | |
68dbb3a6 UD |
114 | |
115 | /* Process the remaining bytes in the buffer and put result from CTX | |
116 | in first 16 bytes following RESBUF. The result is always in little | |
117 | endian byte order, so that a byte-wise output yields to the wanted | |
118 | ASCII representation of the message digest. | |
119 | ||
120 | IMPORTANT: On some systems it is required that RESBUF is correctly | |
121 | aligned for a 32 bits value. */ | |
79937577 | 122 | extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW; |
68dbb3a6 UD |
123 | |
124 | ||
125 | /* Put result from CTX in first 16 bytes following RESBUF. The result is | |
126 | always in little endian byte order, so that a byte-wise output yields | |
127 | to the wanted ASCII representation of the message digest. | |
128 | ||
129 | IMPORTANT: On some systems it is required that RESBUF is correctly | |
130 | aligned for a 32 bits value. */ | |
79937577 | 131 | extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW; |
68dbb3a6 UD |
132 | |
133 | ||
134 | /* Compute MD5 message digest for bytes read from STREAM. The | |
135 | resulting message digest number will be written into the 16 bytes | |
136 | beginning at RESBLOCK. */ | |
79937577 | 137 | extern int __md5_stream (FILE *stream, void *resblock) __THROW; |
68dbb3a6 UD |
138 | |
139 | /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The | |
140 | result is always in little endian byte order, so that a byte-wise | |
141 | output yields to the wanted ASCII representation of the message | |
142 | digest. */ | |
79937577 UD |
143 | extern void *__md5_buffer (const char *buffer, size_t len, |
144 | void *resblock) __THROW; | |
68dbb3a6 | 145 | |
36775c3b | 146 | #endif /* md5.h */ |