| 1 | /* Declaration of functions and data types used for MD5 sum computing |
| 2 | library functions. |
| 3 | Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2014 Free Software |
| 4 | Foundation, Inc. |
| 5 | This file is part of the GNU C Library. |
| 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 3, 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef _MD5_H |
| 21 | #define _MD5_H 1 |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | # if HAVE_OPENSSL_MD5 |
| 27 | # include <openssl/md5.h> |
| 28 | # endif |
| 29 | |
| 30 | #define MD5_DIGEST_SIZE 16 |
| 31 | #define MD5_BLOCK_SIZE 64 |
| 32 | |
| 33 | #ifndef __GNUC_PREREQ |
| 34 | # if defined __GNUC__ && defined __GNUC_MINOR__ |
| 35 | # define __GNUC_PREREQ(maj, min) \ |
| 36 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
| 37 | # else |
| 38 | # define __GNUC_PREREQ(maj, min) 0 |
| 39 | # endif |
| 40 | #endif |
| 41 | |
| 42 | #ifndef __THROW |
| 43 | # if defined __cplusplus && __GNUC_PREREQ (2,8) |
| 44 | # define __THROW throw () |
| 45 | # else |
| 46 | # define __THROW |
| 47 | # endif |
| 48 | #endif |
| 49 | |
| 50 | #ifndef _LIBC |
| 51 | # define __md5_buffer md5_buffer |
| 52 | # define __md5_finish_ctx md5_finish_ctx |
| 53 | # define __md5_init_ctx md5_init_ctx |
| 54 | # define __md5_process_block md5_process_block |
| 55 | # define __md5_process_bytes md5_process_bytes |
| 56 | # define __md5_read_ctx md5_read_ctx |
| 57 | # define __md5_stream md5_stream |
| 58 | #endif |
| 59 | |
| 60 | # ifdef __cplusplus |
| 61 | extern "C" { |
| 62 | # endif |
| 63 | |
| 64 | # if HAVE_OPENSSL_MD5 |
| 65 | # define GL_OPENSSL_NAME 5 |
| 66 | # include "gl_openssl.h" |
| 67 | # else |
| 68 | /* Structure to save state of computation between the single steps. */ |
| 69 | struct md5_ctx |
| 70 | { |
| 71 | uint32_t A; |
| 72 | uint32_t B; |
| 73 | uint32_t C; |
| 74 | uint32_t D; |
| 75 | |
| 76 | uint32_t total[2]; |
| 77 | uint32_t buflen; |
| 78 | uint32_t buffer[32]; |
| 79 | }; |
| 80 | |
| 81 | /* |
| 82 | * The following three functions are build up the low level used in |
| 83 | * the functions 'md5_stream' and 'md5_buffer'. |
| 84 | */ |
| 85 | |
| 86 | /* Initialize structure containing state of computation. |
| 87 | (RFC 1321, 3.3: Step 3) */ |
| 88 | extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW; |
| 89 | |
| 90 | /* Starting with the result of former calls of this function (or the |
| 91 | initialization function update the context for the next LEN bytes |
| 92 | starting at BUFFER. |
| 93 | It is necessary that LEN is a multiple of 64!!! */ |
| 94 | extern void __md5_process_block (const void *buffer, size_t len, |
| 95 | struct md5_ctx *ctx) __THROW; |
| 96 | |
| 97 | /* Starting with the result of former calls of this function (or the |
| 98 | initialization function update the context for the next LEN bytes |
| 99 | starting at BUFFER. |
| 100 | It is NOT required that LEN is a multiple of 64. */ |
| 101 | extern void __md5_process_bytes (const void *buffer, size_t len, |
| 102 | struct md5_ctx *ctx) __THROW; |
| 103 | |
| 104 | /* Process the remaining bytes in the buffer and put result from CTX |
| 105 | in first 16 bytes following RESBUF. The result is always in little |
| 106 | endian byte order, so that a byte-wise output yields to the wanted |
| 107 | ASCII representation of the message digest. */ |
| 108 | extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW; |
| 109 | |
| 110 | |
| 111 | /* Put result from CTX in first 16 bytes following RESBUF. The result is |
| 112 | always in little endian byte order, so that a byte-wise output yields |
| 113 | to the wanted ASCII representation of the message digest. */ |
| 114 | extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW; |
| 115 | |
| 116 | |
| 117 | /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The |
| 118 | result is always in little endian byte order, so that a byte-wise |
| 119 | output yields to the wanted ASCII representation of the message |
| 120 | digest. */ |
| 121 | extern void *__md5_buffer (const char *buffer, size_t len, |
| 122 | void *resblock) __THROW; |
| 123 | |
| 124 | # endif |
| 125 | /* Compute MD5 message digest for bytes read from STREAM. The |
| 126 | resulting message digest number will be written into the 16 bytes |
| 127 | beginning at RESBLOCK. */ |
| 128 | extern int __md5_stream (FILE *stream, void *resblock) __THROW; |
| 129 | |
| 130 | |
| 131 | # ifdef __cplusplus |
| 132 | } |
| 133 | # endif |
| 134 | |
| 135 | #endif /* md5.h */ |