source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/tools/avr/lib/gcc/avr/4.9.2/plugin/include/md5.h @ 4837

Last change on this file since 4837 was 4837, checked in by daduve, 2 years ago

Adding new version

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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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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
30#include "ansidecl.h"
31
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;
42typedef uintptr_t md5_uintptr;
43#elif defined (HAVE_SYS_TYPES_H) && defined (HAVE_STDINT_H)
44#include <stdint.h>
45#include <sys/types.h>
46typedef uint32_t md5_uint32;
47typedef uintptr_t md5_uintptr;
48#else
49#  define INT_MAX_32_BITS 2147483647
50
51/* If UINT_MAX isn't defined, assume it's a 32-bit type.
52   This should be valid for all systems GNU cares about because
53   that doesn't include 16-bit systems, and only modern systems
54   (that certainly have <limits.h>) have 64+-bit integral types.  */
55
56# ifndef INT_MAX
57#  define INT_MAX INT_MAX_32_BITS
58# endif
59
60# if INT_MAX == INT_MAX_32_BITS
61   typedef unsigned int md5_uint32;
62# else
63#  if SHRT_MAX == INT_MAX_32_BITS
64    typedef unsigned short md5_uint32;
65#  else
66#   if LONG_MAX == INT_MAX_32_BITS
67     typedef unsigned long md5_uint32;
68#   else
69     /* The following line is intended to evoke an error.
70        Using #error is not portable enough.  */
71     "Cannot determine unsigned 32-bit data type."
72#   endif
73#  endif
74# endif
75/* We have to make a guess about the integer type equivalent in size
76   to pointers which should always be correct.  */
77typedef unsigned long int md5_uintptr;
78#endif
79
80#ifdef __cplusplus
81extern "C" {
82#endif
83
84/* Structure to save state of computation between the single steps.  */
85struct md5_ctx
86{
87  md5_uint32 A;
88  md5_uint32 B;
89  md5_uint32 C;
90  md5_uint32 D;
91
92  md5_uint32 total[2];
93  md5_uint32 buflen;
94  char buffer[128] ATTRIBUTE_ALIGNED_ALIGNOF(md5_uint32);
95};
96
97/*
98 * The following three functions are build up the low level used in
99 * the functions `md5_stream' and `md5_buffer'.
100 */
101
102/* Initialize structure containing state of computation.
103   (RFC 1321, 3.3: Step 3)  */
104extern void md5_init_ctx (struct md5_ctx *ctx);
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   It is necessary that LEN is a multiple of 64!!! */
110extern void md5_process_block (const void *buffer, size_t len,
111                               struct md5_ctx *ctx);
112
113/* Starting with the result of former calls of this function (or the
114   initialization function update the context for the next LEN bytes
115   starting at BUFFER.
116   It is NOT required that LEN is a multiple of 64.  */
117extern void md5_process_bytes (const void *buffer, size_t len,
118                               struct md5_ctx *ctx);
119
120/* Process the remaining bytes in the buffer and put result from CTX
121   in first 16 bytes following RESBUF.  The result is always in little
122   endian byte order, so that a byte-wise output yields to the wanted
123   ASCII representation of the message digest.
124
125   IMPORTANT: On some systems it is required that RESBUF is correctly
126   aligned for a 32 bits value.  */
127extern void *md5_finish_ctx (struct md5_ctx *ctx, void *resbuf);
128
129
130/* Put result from CTX in first 16 bytes following RESBUF.  The result is
131   always in little endian byte order, so that a byte-wise output yields
132   to the wanted ASCII representation of the message digest.
133
134   IMPORTANT: On some systems it is required that RESBUF is correctly
135   aligned for a 32 bits value.  */
136extern void *md5_read_ctx (const struct md5_ctx *ctx, void *resbuf);
137
138
139/* Compute MD5 message digest for bytes read from STREAM.  The
140   resulting message digest number will be written into the 16 bytes
141   beginning at RESBLOCK.  */
142extern int md5_stream (FILE *stream, void *resblock);
143
144/* Compute MD5 message digest for LEN bytes beginning at BUFFER.  The
145   result is always in little endian byte order, so that a byte-wise
146   output yields to the wanted ASCII representation of the message
147   digest.  */
148extern void *md5_buffer (const char *buffer, size_t len, void *resblock);
149
150#ifdef __cplusplus
151}
152#endif
153
154#endif
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