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.
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
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.
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. */
24 #define PARAMS(args) args
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. */
37 # include <sys/types.h>
38 typedef u_int32_t md5_uint32
;
40 # if defined __STDC__ && __STDC__
41 # define UINT_MAX_32_BITS 4294967295U
43 # define UINT_MAX_32_BITS 0xFFFFFFFF
46 #define MD5_DIGEST_BYTES (16)
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. */
54 # define UINT_MAX UINT_MAX_32_BITS
57 # if UINT_MAX == UINT_MAX_32_BITS
58 typedef unsigned int md5_uint32
;
60 # if USHRT_MAX == UINT_MAX_32_BITS
61 typedef unsigned short md5_uint32
;
63 # if ULONG_MAX == UINT_MAX_32_BITS
64 typedef unsigned long md5_uint32
;
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."
74 /* Structure to save state of computation between the single steps. */
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
));
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
98 extern void *md5_buffer
PARAMS ((const char *buffer
, size_t len
,