1 /* 2 Copyright (C) 2011 Con Kolivas 3 Copyright (C) 1995-2011 Ulrich Drepper. 4 5 Declaration of functions and data types used for MD5 sum computing 6 library functions. 7 Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2011 Free Software 8 Foundation, Inc. 9 This file is part of the GNU C Library. 10 11 This program is free software; you can redistribute it and/or modify it 12 under the terms of the GNU General Public License as published by the 13 Free Software Foundation; either version 3, or (at your option) any 14 later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software Foundation, 23 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 24 25 #ifndef _MD5_H 26 #define _MD5_H 1 27 28 #include <stdint.h> 29 30 #include "lrzip_private.h" 31 32 #define MD5_DIGEST_SIZE 16 33 #define MD5_BLOCK_SIZE 64 34 35 #ifndef __GNUC_PREREQ 36 # if defined __GNUC__ && defined __GNUC_MINOR__ 37 # define __GNUC_PREREQ(maj, min) \ 38 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) 39 # else 40 # define __GNUC_PREREQ(maj, min) 0 41 # endif 42 #endif 43 44 #ifndef __THROW 45 # if defined __cplusplus && __GNUC_PREREQ (2,8) 46 # define __THROW throw () 47 # else 48 # define __THROW 49 # endif 50 #endif 51 52 #ifndef _LIBC 53 # define __md5_buffer md5_buffer 54 # define __md5_finish_ctx md5_finish_ctx 55 # define __md5_init_ctx md5_init_ctx 56 # define __md5_process_block md5_process_block 57 # define __md5_process_bytes md5_process_bytes 58 # define __md5_read_ctx md5_read_ctx 59 # define __md5_stream md5_stream 60 #endif 61 62 # ifdef __cplusplus 63 extern "C" { 64 # endif 65 66 /* 67 * The following three functions are build up the low level used in 68 * the functions `md5_stream' and `md5_buffer'. 69 */ 70 71 /* Initialize structure containing state of computation. 72 (RFC 1321, 3.3: Step 3) */ 73 extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW; 74 75 /* Starting with the result of former calls of this function (or the 76 initialization function update the context for the next LEN bytes 77 starting at BUFFER. 78 It is necessary that LEN is a multiple of 64!!! */ 79 extern void __md5_process_block (const void *buffer, size_t len, 80 struct md5_ctx *ctx) __THROW; 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 NOT required that LEN is a multiple of 64. */ 86 extern void __md5_process_bytes (const void *buffer, size_t len, 87 struct md5_ctx *ctx) __THROW; 88 89 /* Process the remaining bytes in the buffer and put result from CTX 90 in first 16 bytes following RESBUF. The result is always in little 91 endian byte order, so that a byte-wise output yields to the wanted 92 ASCII representation of the message digest. */ 93 extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW; 94 95 96 /* Put result from CTX in first 16 bytes following RESBUF. The result is 97 always in little endian byte order, so that a byte-wise output yields 98 to the wanted ASCII representation of the message digest. */ 99 extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW; 100 101 102 /* Compute MD5 message digest for bytes read from STREAM. The 103 resulting message digest number will be written into the 16 bytes 104 beginning at RESBLOCK. */ 105 extern int __md5_stream (FILE *stream, void *resblock) __THROW; 106 107 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The 108 result is always in little endian byte order, so that a byte-wise 109 output yields to the wanted ASCII representation of the message 110 digest. */ 111 extern void *__md5_buffer (const char *buffer, size_t len, 112 void *resblock) __THROW; 113 114 # ifdef __cplusplus 115 } 116 # endif 117 118 #endif /* md5.h */ 119