release/src/router/mdu/md5.h

   1 /* md5.h - Declaration of functions and data types used for MD5 sum
   2    computing library functions.
   3    Copyright (C) 1995, 1996 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
  23
  24 #define PARAMS(args) args
  25
  26 #include <stdio.h>
  27
  28 /* The following contortions are an attempt to use the C preprocessor
  29    to determine an unsigned integral type that is 32 bits wide.  An
  30    alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
  31    doing that would require that the configure script compile and *run*
  32    the resulting executable.  Locally running cross-compiled executables
  33    is usually not possible.  */
  34
  35 #ifdef _LIBC
  36 # include <limits.h>
  37 # include <sys/types.h>
  38 typedef u_int32_t md5_uint32;
  39 #else
  40 # if defined __STDC__ && __STDC__
  41 #  define UINT_MAX_32_BITS 4294967295U
  42 # else
  43 #  define UINT_MAX_32_BITS 0xFFFFFFFF
  44 # endif
  45
  46 #define MD5_DIGEST_BYTES (16)
  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
  74 /* Structure to save state of computation between the single steps.  */
  75 struct md5_ctx
  76 {
  77   md5_uint32 A;
  78   md5_uint32 B;
  79   md5_uint32 C;
  80   md5_uint32 D;
  81
  82   md5_uint32 total[2];
  83   md5_uint32 buflen;
  84   char buffer[128];
  85 };
  86
  87 #if 0
  88 /* Compute MD5 message digest for bytes read from STREAM.  The
  89    resulting message digest number will be written into the 16 bytes
  90    beginning at RESBLOCK.  */
  91 extern int md5_stream PARAMS ((FILE *stream, void *resblock));
  92 #endif
  93
  94 /* Compute MD5 message digest for LEN bytes beginning at BUFFER.  The
  95    result is always in little endian byte order, so that a byte-wise
  96    output yields to the wanted ASCII representation of the message
  97    digest.  */
  98 extern void *md5_buffer PARAMS ((const char *buffer, size_t len,
  99                                  void *resblock));
 100
 101 #endif