cvsroot/libcpjit/md5.h

/* md5.h - Declaration of functions and data types used for MD5 sum
   computing library functions.
   Copyright (C) 1995, 1996, 1999, 2000, 2003 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

#include <inttypes.h>

/* 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.  */

typedef uint32_t md5_uint32;
typedef uintptr_t md5_uintptr;

/* 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 (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 (const void *buffer, int 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 (const void *buffer, int 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 be correctly
   aligned for a 32 bits value.  */
extern void *md5_finish_ctx (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 (const struct md5_ctx *ctx, void *resbuf);


/* 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, int len, void *resblock);

#endif
Revision:	1.2
Committed:	Fri Oct 14 01:29:45 2005 UTC (18 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.1:	+93 -13 lines
Log Message:	* empty log message *
#	Content
1	/* md5.h - Declaration of functions and data types used for MD5 sum
2	computing library functions.
3	Copyright (C) 1995, 1996, 1999, 2000, 2003 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 1
23
24	#include <inttypes.h>
25
26	/* The following contortions are an attempt to use the C preprocessor
27	to determine an unsigned integral type that is 32 bits wide. An
28	alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
29	doing that would require that the configure script compile and run
30	the resulting executable. Locally running cross-compiled executables
31	is usually not possible. */
32
33	typedef uint32_t md5_uint32;
34	typedef uintptr_t md5_uintptr;
35
36	/* Structure to save state of computation between the single steps. */
37	struct md5_ctx
38	{
39	md5_uint32 A;
40	md5_uint32 B;
41	md5_uint32 C;
42	md5_uint32 D;
43
44	md5_uint32 total[2];
45	md5_uint32 buflen;
46	char buffer[128];
47	};
48
49	/*
50	* The following three functions are build up the low level used in
51	* the functions `md5_stream' and `md5_buffer'.
52	*/
53
54	/* Initialize structure containing state of computation.
55	(RFC 1321, 3.3: Step 3) */
56	extern void md5_init_ctx (struct md5_ctx *ctx);
57
58	/* Starting with the result of former calls of this function (or the
59	initialization function update the context for the next LEN bytes
60	starting at BUFFER.
61	It is necessary that LEN is a multiple of 64!!! */
62	extern void md5_process_block (const void *buffer, int len,
63	struct md5_ctx *ctx);
64
65	/* Starting with the result of former calls of this function (or the
66	initialization function update the context for the next LEN bytes
67	starting at BUFFER.
68	It is NOT required that LEN is a multiple of 64. */
69	extern void md5_process_bytes (const void *buffer, int len,
70	struct md5_ctx *ctx);
71
72	/* Process the remaining bytes in the buffer and put result from CTX
73	in first 16 bytes following RESBUF. The result is always in little
74	endian byte order, so that a byte-wise output yields to the wanted
75	ASCII representation of the message digest.
76
77	IMPORTANT: On some systems it is required that RESBUF be correctly
78	aligned for a 32 bits value. */
79	extern void md5_finish_ctx (struct md5_ctx ctx, void *resbuf);
80
81
82	/* Put result from CTX in first 16 bytes following RESBUF. The result is
83	always in little endian byte order, so that a byte-wise output yields
84	to the wanted ASCII representation of the message digest.
85
86	IMPORTANT: On some systems it is required that RESBUF is correctly
87	aligned for a 32 bits value. */
88	extern void md5_read_ctx (const struct md5_ctx ctx, void *resbuf);
89
90
91	/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
92	result is always in little endian byte order, so that a byte-wise
93	output yields to the wanted ASCII representation of the message
94	digest. */
95	extern void md5_buffer (const char buffer, int len, void *resblock);
96
97	#endif