QOF  0.8.7
md5.h
1 /* md5.h - Declaration of functions and data types used for MD5 sum
2  computing library functions.
3  Copyright (C) 1995, 1996, 2011 Free Software Foundation, Inc.
4  NOTE: The canonical source of this file is maintained with the GNU C
5  Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
6 
7  This program is free software; you can redistribute it and/or modify it
8  under the terms of the GNU General Public License as published by the
9  Free Software Foundation; either version 2, or (at your option) any
10  later version.
11 
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  GNU General Public License for more details.
16 
17  You should have received a copy of the GNU General Public License
18  along with this program; if not, write to the Free Software Foundation,
19  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 
21 #ifndef _MD5_H
22 #define _MD5_H 1
23 
24 #include <stddef.h>
25 #include <stdio.h>
26 
27 #if defined HAVE_LIMITS_H || _LIBC
28 # include <limits.h>
29 #endif
30 
31 /* The following contortions are an attempt to use the C preprocessor
32  to determine an unsigned integral type that is 32 bits wide. An
33  alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
34  doing that would require that the configure script compile and *run*
35  the resulting executable. Locally running cross-compiled executables
36  is usually not possible. */
37 
38 #ifdef _LIBC
39 # include <sys/types.h>
40 typedef u_int32_t md5_uint32;
41 #else
42 # if defined __STDC__ && __STDC__
43 # define UINT_MAX_32_BITS 4294967295U
44 # else
45 # define UINT_MAX_32_BITS 0xFFFFFFFF
46 # endif
47 
48 /* If UINT_MAX isn't defined, assume it's a 32-bit type.
49  This should be valid for all systems GNU cares about because
50  that doesn't include 16-bit systems, and only modern systems
51  (that certainly have <limits.h>) have 64+-bit integral types. */
52 
53 # ifndef UINT_MAX
54 # define UINT_MAX UINT_MAX_32_BITS
55 # endif
56 
57 # if UINT_MAX == UINT_MAX_32_BITS
58 typedef unsigned int md5_uint32;
59 # else
60 # if USHRT_MAX == UINT_MAX_32_BITS
61 typedef unsigned short md5_uint32;
62 # else
63 # if ULONG_MAX == UINT_MAX_32_BITS
64 typedef unsigned long md5_uint32;
65 # else
66  /* The following line is intended to evoke an error.
67  Using #error is not portable enough. */
68 "Cannot determine unsigned 32-bit data type."
69 # endif
70 # endif
71 # endif
72 #endif
73 #undef __P
74 #if defined (__STDC__) && __STDC__
75 #define __P(x) x
76 #else
77 #define __P(x) ()
78 #endif
79 /* Structure to save state of computation between the single steps. */
80  struct md5_ctx
81 {
82  md5_uint32 A;
83  md5_uint32 B;
84  md5_uint32 C;
85  md5_uint32 D;
86 
87  md5_uint32 total[2];
88  md5_uint32 buflen;
89  union
90  {
91  char buffer[128];
92  md5_uint32 buffer32[32];
93  };
94 };
95 
96 /*
97  * The following three functions are build up the low level used in
98  * the functions `md5_stream' and `md5_buffer'.
99  */
100 
101 /* Initialize structure containing state of computation.
102  (RFC 1321, 3.3: Step 3) */
103 extern void md5_init_ctx __P ((struct md5_ctx * ctx));
104 
105 
106 /* Starting with the result of former calls of this function (or the
107  initialization function update the context for the next LEN bytes
108  starting at BUFFER.
109 
110  It is necessary that LEN is a multiple of 64!!!
111 
112  IMPORTANT: On some systems it is required that buffer be 32-bit
113  aligned. */
114 extern void md5_process_block __P ((const void *buffer, size_t len,
115  struct md5_ctx * ctx));
116 
117 /* Starting with the result of former calls of this function (or the
118  initialization function) update the context for the next LEN bytes
119  starting at BUFFER.
120 
121  It is NOT required that LEN is a multiple of 64.
122 
123  IMPORTANT: On some systems it is required that buffer be 32-bit
124  aligned. */
125 extern void md5_process_bytes __P ((const void *buffer, size_t len,
126  struct md5_ctx * ctx));
127 
128 /* Process the remaining bytes in the buffer and put result from CTX
129  in first 16 bytes following RESBUF. The result is always in little
130  endian byte order, so that a byte-wise output yields to the wanted
131  ASCII representation of the message digest.
132 
133  IMPORTANT: On some systems it is required that RESBUF be correctly
134  aligned for a 32 bits value. */
135 extern void *md5_finish_ctx __P ((struct md5_ctx * ctx, void *resbuf));
136 
137 
138 /* Put result from CTX in first 16 bytes following RESBUF. The result is
139  always in little endian byte order, so that a byte-wise output yields
140  to the wanted ASCII representation of the message digest.
141 
142  IMPORTANT: On some systems it is required that RESBUF be correctly
143  aligned for a 32 bits value. */
144 extern void *md5_read_ctx __P ((const struct md5_ctx * ctx, void *resbuf));
145 
146 
147 /* Compute MD5 message digest for bytes read from STREAM. The
148  resulting message digest number will be written into the 16 bytes
149  beginning at RESBLOCK.
150 
151  IMPORTANT: On some systems it is required that resblock be 32-bit
152  aligned. */
153 extern int md5_stream __P ((FILE * stream, void *resblock));
154 
155 
156 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
157  result is always in little endian byte order, so that a byte-wise
158  output yields to the wanted ASCII representation of the message
159  digest.
160 
161  IMPORTANT: On some systems it is required that buffer and resblock
162  be correctly 32-bit aligned. */
163 extern void *md5_buffer
164 __P ((const char *buffer, size_t len, void *resblock));
165 
166 #endif
Definition: md5.h:80