[bpt/emacs.git] / lib / md5.h

/* Declaration of functions and data types used for MD5 sum computing
   library functions.
   Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2011 Free Software
   Foundation, Inc.
   This file is part of the GNU C Library.

   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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

#ifndef _MD5_H
#define _MD5_H 1

#include <stdio.h>
#include <stdint.h>

#define MD5_DIGEST_SIZE 16
#define MD5_BLOCK_SIZE 64

#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
#  define __GNUC_PREREQ(maj, min)                                       \
  ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
# else
#  define __GNUC_PREREQ(maj, min) 0
# endif
#endif

#ifndef __THROW
# if defined __cplusplus && __GNUC_PREREQ (2,8)
#  define __THROW       throw ()
# else
#  define __THROW
# endif
#endif

#ifndef _LIBC
# define __md5_buffer md5_buffer
# define __md5_finish_ctx md5_finish_ctx
# define __md5_init_ctx md5_init_ctx
# define __md5_process_block md5_process_block
# define __md5_process_bytes md5_process_bytes
# define __md5_read_ctx md5_read_ctx
# define __md5_stream md5_stream
#endif

# ifdef __cplusplus
extern "C" {
# endif

/* Structure to save state of computation between the single steps.  */
struct md5_ctx
{
  uint32_t A;
  uint32_t B;
  uint32_t C;
  uint32_t D;

  uint32_t total[2];
  uint32_t buflen;
  uint32_t buffer[32];
};

/*
 * 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 (struct md5_ctx *ctx) __THROW;

/* 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 (const void *buffer, size_t len,
                                 struct md5_ctx *ctx) __THROW;

/* 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 (const void *buffer, size_t len,
                                 struct md5_ctx *ctx) __THROW;

/* 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.  */
extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;


/* 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.  */
extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;


/* 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 (FILE *stream, void *resblock) __THROW;

/* 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 (const char *buffer, size_t len,
                           void *resblock) __THROW;

# ifdef __cplusplus
}
# endif

#endif /* md5.h */
Commit	Line	Data
693c4692 GM	1	/* Declaration of functions and data types used for MD5 sum computing
693c4692 GM	2	library functions.
942f733f PE	3	Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2011 Free Software
	4	Foundation, Inc.
	5	This file is part of the GNU C Library.
693c4692	6
942f733f PE	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 3, or (at your option) any
	10	later version.
693c4692	11
942f733f	12	This program is distributed in the hope that it will be useful,
693c4692	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
942f733f PE	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
942f733f PE	15	GNU General Public License for more details.
693c4692	16
942f733f PE	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. */
693c4692 GM	20
	21	#ifndef _MD5_H
	22	#define _MD5_H 1
	23
	24	#include <stdio.h>
5f90be1b	25	#include <stdint.h>
693c4692	26
942f733f PE	27	#define MD5_DIGEST_SIZE 16
	28	#define MD5_BLOCK_SIZE 64
	29
	30	#ifndef __GNUC_PREREQ
	31	# if defined __GNUC__ && defined __GNUC_MINOR__
	32	# define __GNUC_PREREQ(maj, min) \
	33	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
	34	# else
	35	# define __GNUC_PREREQ(maj, min) 0
	36	# endif
	37	#endif
	38
	39	#ifndef __THROW
	40	# if defined __cplusplus && __GNUC_PREREQ (2,8)
	41	# define __THROW throw ()
	42	# else
	43	# define __THROW
	44	# endif
	45	#endif
	46
	47	#ifndef _LIBC
	48	# define __md5_buffer md5_buffer
	49	# define __md5_finish_ctx md5_finish_ctx
	50	# define __md5_init_ctx md5_init_ctx
	51	# define __md5_process_block md5_process_block
	52	# define __md5_process_bytes md5_process_bytes
	53	# define __md5_read_ctx md5_read_ctx
	54	# define __md5_stream md5_stream
693c4692 GM	55	#endif
693c4692 GM	56
942f733f PE	57	# ifdef __cplusplus
	58	extern "C" {
	59	# endif
	60
693c4692 GM	61	/* Structure to save state of computation between the single steps. */
	62	struct md5_ctx
	63	{
5f90be1b PE	64	uint32_t A;
	65	uint32_t B;
	66	uint32_t C;
	67	uint32_t D;
	68
	69	uint32_t total[2];
	70	uint32_t buflen;
	71	uint32_t buffer[32];
693c4692 GM	72	};
	73
	74	/*
	75	* The following three functions are build up the low level used in
	76	* the functions `md5_stream' and `md5_buffer'.
	77	*/
	78
	79	/* Initialize structure containing state of computation.
	80	(RFC 1321, 3.3: Step 3) */
942f733f	81	extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
693c4692 GM	82
	83	/* Starting with the result of former calls of this function (or the
	84	initialization function update the context for the next LEN bytes
	85	starting at BUFFER.
	86	It is necessary that LEN is a multiple of 64!!! */
942f733f PE	87	extern void __md5_process_block (const void *buffer, size_t len,
942f733f PE	88	struct md5_ctx *ctx) __THROW;
693c4692 GM	89
	90	/* Starting with the result of former calls of this function (or the
	91	initialization function update the context for the next LEN bytes
	92	starting at BUFFER.
	93	It is NOT required that LEN is a multiple of 64. */
942f733f PE	94	extern void __md5_process_bytes (const void *buffer, size_t len,
942f733f PE	95	struct md5_ctx *ctx) __THROW;
693c4692 GM	96
	97	/* Process the remaining bytes in the buffer and put result from CTX
	98	in first 16 bytes following RESBUF. The result is always in little
	99	endian byte order, so that a byte-wise output yields to the wanted
942f733f PE	100	ASCII representation of the message digest. */
942f733f PE	101	extern void __md5_finish_ctx (struct md5_ctx ctx, void *resbuf) __THROW;
693c4692 GM	102
	103
	104	/* Put result from CTX in first 16 bytes following RESBUF. The result is
	105	always in little endian byte order, so that a byte-wise output yields
942f733f PE	106	to the wanted ASCII representation of the message digest. */
942f733f PE	107	extern void __md5_read_ctx (const struct md5_ctx ctx, void *resbuf) __THROW;
693c4692 GM	108
	109
	110	/* Compute MD5 message digest for bytes read from STREAM. The
	111	resulting message digest number will be written into the 16 bytes
	112	beginning at RESBLOCK. */
942f733f	113	extern int __md5_stream (FILE stream, void resblock) __THROW;
693c4692 GM	114
	115	/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
	116	result is always in little endian byte order, so that a byte-wise
	117	output yields to the wanted ASCII representation of the message
	118	digest. */
942f733f PE	119	extern void __md5_buffer (const char buffer, size_t len,
	120	void *resblock) __THROW;
	121
	122	# ifdef __cplusplus
	123	}
	124	# endif
693c4692 GM	125
693c4692 GM	126	#endif /* md5.h */