[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, 2008-2013 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, see <http://www.gnu.org/licenses/>.  */

#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.
ab422c4d	3	Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2013 Free Software
942f733f PE	4	Foundation, Inc.
942f733f PE	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	17	You should have received a copy of the GNU General Public License
caf8a9b2	18	along with this program; if not, see <http://www.gnu.org/licenses/>. */
693c4692 GM	19
	20	#ifndef _MD5_H
	21	#define _MD5_H 1
	22
	23	#include <stdio.h>
5f90be1b	24	#include <stdint.h>
693c4692	25
942f733f PE	26	#define MD5_DIGEST_SIZE 16
	27	#define MD5_BLOCK_SIZE 64
	28
	29	#ifndef __GNUC_PREREQ
	30	# if defined __GNUC__ && defined __GNUC_MINOR__
	31	# define __GNUC_PREREQ(maj, min) \
	32	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
	33	# else
	34	# define __GNUC_PREREQ(maj, min) 0
	35	# endif
	36	#endif
	37
	38	#ifndef __THROW
	39	# if defined __cplusplus && __GNUC_PREREQ (2,8)
	40	# define __THROW throw ()
	41	# else
	42	# define __THROW
	43	# endif
	44	#endif
	45
	46	#ifndef _LIBC
	47	# define __md5_buffer md5_buffer
	48	# define __md5_finish_ctx md5_finish_ctx
	49	# define __md5_init_ctx md5_init_ctx
	50	# define __md5_process_block md5_process_block
	51	# define __md5_process_bytes md5_process_bytes
	52	# define __md5_read_ctx md5_read_ctx
	53	# define __md5_stream md5_stream
693c4692 GM	54	#endif
693c4692 GM	55
942f733f PE	56	# ifdef __cplusplus
	57	extern "C" {
	58	# endif
	59
693c4692 GM	60	/* Structure to save state of computation between the single steps. */
	61	struct md5_ctx
	62	{
5f90be1b PE	63	uint32_t A;
	64	uint32_t B;
	65	uint32_t C;
	66	uint32_t D;
	67
	68	uint32_t total[2];
	69	uint32_t buflen;
	70	uint32_t buffer[32];
693c4692 GM	71	};
	72
	73	/*
	74	* The following three functions are build up the low level used in
caf8a9b2	75	* the functions 'md5_stream' and 'md5_buffer'.
693c4692 GM	76	*/
	77
	78	/* Initialize structure containing state of computation.
	79	(RFC 1321, 3.3: Step 3) */
942f733f	80	extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
693c4692 GM	81
	82	/* Starting with the result of former calls of this function (or the
	83	initialization function update the context for the next LEN bytes
	84	starting at BUFFER.
	85	It is necessary that LEN is a multiple of 64!!! */
942f733f PE	86	extern void __md5_process_block (const void *buffer, size_t len,
942f733f PE	87	struct md5_ctx *ctx) __THROW;
693c4692 GM	88
	89	/* Starting with the result of former calls of this function (or the
	90	initialization function update the context for the next LEN bytes
	91	starting at BUFFER.
	92	It is NOT required that LEN is a multiple of 64. */
942f733f PE	93	extern void __md5_process_bytes (const void *buffer, size_t len,
942f733f PE	94	struct md5_ctx *ctx) __THROW;
693c4692 GM	95
	96	/* Process the remaining bytes in the buffer and put result from CTX
	97	in first 16 bytes following RESBUF. The result is always in little
	98	endian byte order, so that a byte-wise output yields to the wanted
942f733f PE	99	ASCII representation of the message digest. */
942f733f PE	100	extern void __md5_finish_ctx (struct md5_ctx ctx, void *resbuf) __THROW;
693c4692 GM	101
	102
	103	/* Put result from CTX in first 16 bytes following RESBUF. The result is
	104	always in little endian byte order, so that a byte-wise output yields
942f733f PE	105	to the wanted ASCII representation of the message digest. */
942f733f PE	106	extern void __md5_read_ctx (const struct md5_ctx ctx, void *resbuf) __THROW;
693c4692 GM	107
	108
	109	/* Compute MD5 message digest for bytes read from STREAM. The
	110	resulting message digest number will be written into the 16 bytes
	111	beginning at RESBLOCK. */
942f733f	112	extern int __md5_stream (FILE stream, void resblock) __THROW;
693c4692 GM	113
	114	/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
	115	result is always in little endian byte order, so that a byte-wise
	116	output yields to the wanted ASCII representation of the message
	117	digest. */
942f733f PE	118	extern void __md5_buffer (const char buffer, size_t len,
	119	void *resblock) __THROW;
	120
	121	# ifdef __cplusplus
	122	}
	123	# endif
693c4692 GM	124
693c4692 GM	125	#endif /* md5.h */