1 /* Declaration of functions and data types used for MD5 sum computing
3 Copyright (C) 1995-1997,1999,2000,2001,2004,2005,2006,2008
4 Free Software Foundation, Inc.
6 NOTE: The canonical source of this file is maintained with the GNU C
7 Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
9 This program is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
29 # include <inttypes.h>
31 #if HAVE_STDINT_H || _LIBC
35 # include <sys/types.h>
39 # if defined __GNUC__ && defined __GNUC_MINOR__
40 # define __GNUC_PREREQ(maj, min) \
41 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
43 # define __GNUC_PREREQ(maj, min) 0
48 # if defined __cplusplus && __GNUC_PREREQ (2,8)
49 # define __THROW throw ()
56 # define __md5_buffer md5_buffer
57 # define __md5_finish_ctx md5_finish_ctx
58 # define __md5_init_ctx md5_init_ctx
59 # define __md5_process_block md5_process_block
60 # define __md5_process_bytes md5_process_bytes
61 # define __md5_read_ctx md5_read_ctx
62 # define __md5_stream md5_stream
65 typedef uint32_t md5_uint32;
67 /* Structure to save state of computation between the single steps. */
77 md5_uint32 buffer[32];
81 * The following three functions are build up the low level used in
82 * the functions `md5_stream' and `md5_buffer'.
85 /* Initialize structure containing state of computation.
86 (RFC 1321, 3.3: Step 3) */
87 extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
89 /* Starting with the result of former calls of this function (or the
90 initialization function update the context for the next LEN bytes
92 It is necessary that LEN is a multiple of 64!!! */
93 extern void __md5_process_block (const void *buffer, size_t len,
94 struct md5_ctx *ctx) __THROW;
96 /* Starting with the result of former calls of this function (or the
97 initialization function update the context for the next LEN bytes
99 It is NOT required that LEN is a multiple of 64. */
100 extern void __md5_process_bytes (const void *buffer, size_t len,
101 struct md5_ctx *ctx) __THROW;
103 /* Process the remaining bytes in the buffer and put result from CTX
104 in first 16 bytes following RESBUF. The result is always in little
105 endian byte order, so that a byte-wise output yields to the wanted
106 ASCII representation of the message digest. */
107 extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;
110 /* Put result from CTX in first 16 bytes following RESBUF. The result is
111 always in little endian byte order, so that a byte-wise output yields
112 to the wanted ASCII representation of the message digest. */
113 extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
116 /* Compute MD5 message digest for bytes read from STREAM. The
117 resulting message digest number will be written into the 16 bytes
118 beginning at RESBLOCK. */
119 extern int __md5_stream (FILE *stream, void *resblock) __THROW;
121 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
122 result is always in little endian byte order, so that a byte-wise
123 output yields to the wanted ASCII representation of the message
125 extern void *__md5_buffer (const char *buffer, size_t len,
126 void *resblock) __THROW;