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git.ipfire.org Git - thirdparty/mdadm.git/blob - md5.h
1 /* Declaration of functions and data types used for MD5 sum computing
3 Copyright (C) 1995-1997,1999-2005 Free Software Foundation, Inc.
5 NOTE: The canonical source of this file is maintained with the GNU C
6 Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software Foundation,
20 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
28 # include <inttypes.h>
30 #if HAVE_STDINT_H || _LIBC || defined __UCLIBC__
35 # if defined __GNUC__ && defined __GNUC_MINOR__
36 # define __GNUC_PREREQ(maj, min) \
37 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
39 # define __GNUC_PREREQ(maj, min) 0
44 # if defined __cplusplus && __GNUC_PREREQ (2,8)
45 # define __THROW throw ()
52 # if ! __GNUC_PREREQ (2,8) || __STRICT_ANSI__
53 # define __attribute__(x)
58 # define __md5_buffer md5_buffer
59 # define __md5_finish_ctx md5_finish_ctx
60 # define __md5_init_ctx md5_init_ctx
61 # define __md5_process_block md5_process_block
62 # define __md5_process_bytes md5_process_bytes
63 # define __md5_read_ctx md5_read_ctx
64 # define __md5_stream md5_stream
67 typedef uint32_t md5_uint32
;
69 /* Structure to save state of computation between the single steps. */
79 char buffer
[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32
))));
83 * The following three functions are build up the low level used in
84 * the functions `md5_stream' and `md5_buffer'.
87 /* Initialize structure containing state of computation.
88 (RFC 1321, 3.3: Step 3) */
89 extern void __md5_init_ctx (struct md5_ctx
*ctx
) __THROW
;
91 /* Starting with the result of former calls of this function (or the
92 initialization function update the context for the next LEN bytes
94 It is necessary that LEN is a multiple of 64!!! */
95 extern void __md5_process_block (const void *buffer
, size_t len
,
96 struct md5_ctx
*ctx
) __THROW
;
98 /* Starting with the result of former calls of this function (or the
99 initialization function update the context for the next LEN bytes
101 It is NOT required that LEN is a multiple of 64. */
102 extern void __md5_process_bytes (const void *buffer
, size_t len
,
103 struct md5_ctx
*ctx
) __THROW
;
105 /* Process the remaining bytes in the buffer and put result from CTX
106 in first 16 bytes following RESBUF. The result is always in little
107 endian byte order, so that a byte-wise output yields to the wanted
108 ASCII representation of the message digest.
110 IMPORTANT: On some systems it is required that RESBUF be correctly
111 aligned for a 32 bits value. */
112 extern void *__md5_finish_ctx (struct md5_ctx
*ctx
, void *resbuf
) __THROW
;
115 /* Put result from CTX in first 16 bytes following RESBUF. The result is
116 always in little endian byte order, so that a byte-wise output yields
117 to the wanted ASCII representation of the message digest.
119 IMPORTANT: On some systems it is required that RESBUF is correctly
120 aligned for a 32 bits value. */
121 extern void *__md5_read_ctx (const struct md5_ctx
*ctx
, void *resbuf
) __THROW
;
124 /* Compute MD5 message digest for bytes read from STREAM. The
125 resulting message digest number will be written into the 16 bytes
126 beginning at RESBLOCK. */
127 extern int __md5_stream (FILE *stream
, void *resblock
) __THROW
;
129 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
130 result is always in little endian byte order, so that a byte-wise
131 output yields to the wanted ASCII representation of the message
133 extern void *__md5_buffer (const char *buffer
, size_t len
,
134 void *resblock
) __THROW
;