150 lines
5.0 KiB
C
Executable File
150 lines
5.0 KiB
C
Executable File
/* md5.h - Declaration of functions and data types used for MD5 sum
|
|
computing library functions.
|
|
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
|
|
NOTE: The canonical source of this file is maintained with the GNU C
|
|
Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the
|
|
Free Software Foundation; either version 2, or (at your option) any
|
|
later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _MD5_H
|
|
#define _MD5_H 1
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#ifdef USE_MD5
|
|
|
|
#define PARAMS(args) args
|
|
|
|
#include <stdio.h>
|
|
|
|
#if defined HAVE_LIMITS_H || _LIBC
|
|
# include <limits.h>
|
|
#endif
|
|
|
|
/* The following contortions are an attempt to use the C preprocessor
|
|
to determine an unsigned integral type that is 32 bits wide. An
|
|
alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
|
|
doing that would require that the configure script compile and *run*
|
|
the resulting executable. Locally running cross-compiled executables
|
|
is usually not possible. */
|
|
|
|
#ifdef _LIBC
|
|
# include <sys/types.h>
|
|
typedef u_int32_t md5_uint32;
|
|
#else
|
|
# if defined __STDC__ && __STDC__
|
|
# define UINT_MAX_32_BITS 4294967295U
|
|
# else
|
|
# define UINT_MAX_32_BITS 0xFFFFFFFF
|
|
# endif
|
|
|
|
/* If UINT_MAX isn't defined, assume it's a 32-bit type.
|
|
This should be valid for all systems GNU cares about because
|
|
that doesn't include 16-bit systems, and only modern systems
|
|
(that certainly have <limits.h>) have 64+-bit integral types. */
|
|
|
|
# ifndef UINT_MAX
|
|
# define UINT_MAX UINT_MAX_32_BITS
|
|
# endif
|
|
|
|
# if UINT_MAX == UINT_MAX_32_BITS
|
|
typedef unsigned int md5_uint32;
|
|
# else
|
|
# if USHRT_MAX == UINT_MAX_32_BITS
|
|
typedef unsigned short md5_uint32;
|
|
# else
|
|
# if ULONG_MAX == UINT_MAX_32_BITS
|
|
typedef unsigned long md5_uint32;
|
|
# else
|
|
/* The following line is intended to evoke an error.
|
|
Using #error is not portable enough. */
|
|
"Cannot determine unsigned 32-bit data type."
|
|
# endif
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
/* Structure to save state of computation between the single steps. */
|
|
struct md5_ctx
|
|
{
|
|
md5_uint32 A;
|
|
md5_uint32 B;
|
|
md5_uint32 C;
|
|
md5_uint32 D;
|
|
|
|
md5_uint32 total[2];
|
|
md5_uint32 buflen;
|
|
char buffer[128];
|
|
};
|
|
|
|
/*
|
|
* The following three functions are build up the low level used in
|
|
* the functions `md5_stream' and `md5_buffer'.
|
|
*/
|
|
|
|
/* Initialize structure containing state of computation.
|
|
(RFC 1321, 3.3: Step 3) */
|
|
extern void md5_init_ctx PARAMS ((struct md5_ctx *ctx));
|
|
|
|
/* Starting with the result of former calls of this function (or the
|
|
initialization function update the context for the next LEN bytes
|
|
starting at BUFFER.
|
|
It is necessary that LEN is a multiple of 64!!! */
|
|
extern void md5_process_block PARAMS ((const void *buffer, size_t len,
|
|
struct md5_ctx *ctx));
|
|
|
|
/* Starting with the result of former calls of this function (or the
|
|
initialization function update the context for the next LEN bytes
|
|
starting at BUFFER.
|
|
It is NOT required that LEN is a multiple of 64. */
|
|
extern void md5_process_bytes PARAMS ((const void *buffer, size_t len,
|
|
struct md5_ctx *ctx));
|
|
|
|
/* Process the remaining bytes in the buffer and put result from CTX
|
|
in first 16 bytes following RESBUF. The result is always in little
|
|
endian byte order, so that a byte-wise output yields to the wanted
|
|
ASCII representation of the message digest.
|
|
|
|
IMPORTANT: On some systems it is required that RESBUF is correctly
|
|
aligned for a 32 bits value. */
|
|
extern void *md5_finish_ctx PARAMS ((struct md5_ctx *ctx, void *resbuf));
|
|
|
|
|
|
/* Put result from CTX in first 16 bytes following RESBUF. The result is
|
|
always in little endian byte order, so that a byte-wise output yields
|
|
to the wanted ASCII representation of the message digest.
|
|
|
|
IMPORTANT: On some systems it is required that RESBUF is correctly
|
|
aligned for a 32 bits value. */
|
|
extern void *md5_read_ctx PARAMS ((const struct md5_ctx *ctx, void *resbuf));
|
|
|
|
|
|
/* Compute MD5 message digest for bytes read from STREAM. The
|
|
resulting message digest number will be written into the 16 bytes
|
|
beginning at RESBLOCK. */
|
|
extern int md5_stream PARAMS ((FILE *stream, void *resblock));
|
|
|
|
/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
|
|
result is always in little endian byte order, so that a byte-wise
|
|
output yields to the wanted ASCII representation of the message
|
|
digest. */
|
|
extern void *md5_buffer PARAMS ((const char *buffer, size_t len,
|
|
void *resblock));
|
|
|
|
#endif
|
|
#endif
|