Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / include / md5.h
CommitLineData
003757ed
MD
1/* md5.h - Declaration of functions and data types used for MD5 sum
2 computing library functions.
3 Copyright 1995, 1996, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#ifndef _MD5_H
22#define _MD5_H 1
23
24#include <stdio.h>
25
26#if defined HAVE_LIMITS_H || _LIBC
27# include <limits.h>
28#endif
29
1378ea41
SS
30#include "ansidecl.h"
31
003757ed
MD
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
40# include <sys/types.h>
41typedef u_int32_t md5_uint32;
1378ea41 42typedef uintptr_t md5_uintptr;
003757ed
MD
43#else
44# define INT_MAX_32_BITS 2147483647
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 INT_MAX
52# define INT_MAX INT_MAX_32_BITS
53# endif
54
55# if INT_MAX == INT_MAX_32_BITS
56 typedef unsigned int md5_uint32;
57# else
58# if SHRT_MAX == INT_MAX_32_BITS
59 typedef unsigned short md5_uint32;
60# else
61# if LONG_MAX == INT_MAX_32_BITS
62 typedef unsigned long md5_uint32;
63# else
64 /* The following line is intended to evoke an error.
65 Using #error is not portable enough. */
66 "Cannot determine unsigned 32-bit data type."
67# endif
68# endif
69# endif
1378ea41
SS
70/* We have to make a guess about the integer type equivalent in size
71 to pointers which should always be correct. */
72typedef unsigned long int md5_uintptr;
003757ed
MD
73#endif
74
75#undef __P
76#if defined (__STDC__) && __STDC__
77#define __P(x) x
78#else
79#define __P(x) ()
80#endif
81
82/* Structure to save state of computation between the single steps. */
83struct md5_ctx
84{
85 md5_uint32 A;
86 md5_uint32 B;
87 md5_uint32 C;
88 md5_uint32 D;
89
90 md5_uint32 total[2];
91 md5_uint32 buflen;
1378ea41 92 char buffer[128] ATTRIBUTE_ALIGNED_ALIGNOF(md5_uint32);
003757ed
MD
93};
94
95/*
96 * The following three functions are build up the low level used in
97 * the functions `md5_stream' and `md5_buffer'.
98 */
99
100/* Initialize structure containing state of computation.
101 (RFC 1321, 3.3: Step 3) */
102extern void md5_init_ctx __P ((struct md5_ctx *ctx));
103
104/* Starting with the result of former calls of this function (or the
105 initialization function update the context for the next LEN bytes
106 starting at BUFFER.
107 It is necessary that LEN is a multiple of 64!!! */
108extern void md5_process_block __P ((const void *buffer, size_t len,
109 struct md5_ctx *ctx));
110
111/* Starting with the result of former calls of this function (or the
112 initialization function update the context for the next LEN bytes
113 starting at BUFFER.
114 It is NOT required that LEN is a multiple of 64. */
115extern void md5_process_bytes __P ((const void *buffer, size_t len,
116 struct md5_ctx *ctx));
117
118/* Process the remaining bytes in the buffer and put result from CTX
119 in first 16 bytes following RESBUF. The result is always in little
120 endian byte order, so that a byte-wise output yields to the wanted
121 ASCII representation of the message digest.
122
123 IMPORTANT: On some systems it is required that RESBUF is correctly
124 aligned for a 32 bits value. */
125extern void *md5_finish_ctx __P ((struct md5_ctx *ctx, void *resbuf));
126
127
128/* Put result from CTX in first 16 bytes following RESBUF. The result is
129 always in little endian byte order, so that a byte-wise output yields
130 to the wanted ASCII representation of the message digest.
131
132 IMPORTANT: On some systems it is required that RESBUF is correctly
133 aligned for a 32 bits value. */
134extern void *md5_read_ctx __P ((const struct md5_ctx *ctx, void *resbuf));
135
136
137/* Compute MD5 message digest for bytes read from STREAM. The
138 resulting message digest number will be written into the 16 bytes
139 beginning at RESBLOCK. */
140extern int md5_stream __P ((FILE *stream, void *resblock));
141
142/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
143 result is always in little endian byte order, so that a byte-wise
144 output yields to the wanted ASCII representation of the message
145 digest. */
146extern void *md5_buffer __P ((const char *buffer, size_t len, void *resblock));
147
148#endif