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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 1acf7ebb5dab
children
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1 /* Declaration of functions and data types used for MD5 sum computing
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2 library functions.
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3 Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2019 Free Software
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4 Foundation, Inc.
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5 This file is part of the GNU C Library.
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 This program is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with this program; if not, see <https://www.gnu.org/licenses/>. */
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19
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20 #ifndef _MD5_H
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21 #define _MD5_H 1
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22
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23 #include <stdio.h>
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24 #include <stdint.h>
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25
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26 # if HAVE_OPENSSL_MD5
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27 # include <openssl/md5.h>
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28 # endif
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29
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30 #define MD5_DIGEST_SIZE 16
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31 #define MD5_BLOCK_SIZE 64
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32
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33 #ifndef __GNUC_PREREQ
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34 # if defined __GNUC__ && defined __GNUC_MINOR__
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35 # define __GNUC_PREREQ(maj, min) \
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36 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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37 # else
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38 # define __GNUC_PREREQ(maj, min) 0
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39 # endif
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40 #endif
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41
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42 #ifndef __THROW
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43 # if defined __cplusplus && __GNUC_PREREQ (2,8)
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44 # define __THROW throw ()
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45 # else
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46 # define __THROW
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47 # endif
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48 #endif
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49
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50 #ifndef _LIBC
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51 # define __md5_buffer md5_buffer
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52 # define __md5_finish_ctx md5_finish_ctx
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53 # define __md5_init_ctx md5_init_ctx
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54 # define __md5_process_block md5_process_block
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55 # define __md5_process_bytes md5_process_bytes
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56 # define __md5_read_ctx md5_read_ctx
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57 # define __md5_stream md5_stream
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58 #endif
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59
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60 # ifdef __cplusplus
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61 extern "C" {
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62 # endif
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63
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64 # if HAVE_OPENSSL_MD5
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65 # define GL_OPENSSL_NAME 5
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66 # include "gl_openssl.h"
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67 # else
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68 /* Structure to save state of computation between the single steps. */
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69 struct md5_ctx
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70 {
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71 uint32_t A;
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72 uint32_t B;
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73 uint32_t C;
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74 uint32_t D;
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75
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76 uint32_t total[2];
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77 uint32_t buflen; /* ≥ 0, ≤ 128 */
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78 uint32_t buffer[32]; /* 128 bytes; the first buflen bytes are in use */
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79 };
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80
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81 /*
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82 * The following three functions are build up the low level used in
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83 * the functions 'md5_stream' and 'md5_buffer'.
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84 */
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85
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86 /* Initialize structure containing state of computation.
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87 (RFC 1321, 3.3: Step 3) */
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88 extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
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89
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90 /* Starting with the result of former calls of this function (or the
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91 initialization function update the context for the next LEN bytes
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92 starting at BUFFER.
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93 It is necessary that LEN is a multiple of 64!!! */
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94 extern void __md5_process_block (const void *buffer, size_t len,
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95 struct md5_ctx *ctx) __THROW;
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96
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97 /* Starting with the result of former calls of this function (or the
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98 initialization function update the context for the next LEN bytes
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99 starting at BUFFER.
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100 It is NOT required that LEN is a multiple of 64. */
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101 extern void __md5_process_bytes (const void *buffer, size_t len,
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102 struct md5_ctx *ctx) __THROW;
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103
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104 /* Process the remaining bytes in the buffer and put result from CTX
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105 in first 16 bytes following RESBUF. The result is always in little
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106 endian byte order, so that a byte-wise output yields to the wanted
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107 ASCII representation of the message digest. */
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108 extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;
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109
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110
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111 /* Put result from CTX in first 16 bytes following RESBUF. The result is
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112 always in little endian byte order, so that a byte-wise output yields
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113 to the wanted ASCII representation of the message digest. */
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114 extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
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115
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116
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117 /* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
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118 result is always in little endian byte order, so that a byte-wise
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119 output yields to the wanted ASCII representation of the message
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120 digest. */
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121 extern void *__md5_buffer (const char *buffer, size_t len,
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122 void *resblock) __THROW;
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123
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124 # endif
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125 /* Compute MD5 message digest for bytes read from STREAM.
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126 STREAM is an open file stream. Regular files are handled more efficiently.
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127 The contents of STREAM from its current position to its end will be read.
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128 The case that the last operation on STREAM was an 'ungetc' is not supported.
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129 The resulting message digest number will be written into the 16 bytes
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130 beginning at RESBLOCK. */
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131 extern int __md5_stream (FILE *stream, void *resblock) __THROW;
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132
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133
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134 # ifdef __cplusplus
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135 }
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136 # endif
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137
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138 #endif /* md5.h */
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139
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140 /*
33ee5e90be64 maint: Add encoding marker for Emacs to non-ASCII sources.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
141 * Hey Emacs!
33ee5e90be64 maint: Add encoding marker for Emacs to non-ASCII sources.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
142 * Local Variables:
33ee5e90be64 maint: Add encoding marker for Emacs to non-ASCII sources.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
143 * coding: utf-8
33ee5e90be64 maint: Add encoding marker for Emacs to non-ASCII sources.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
144 * End:
33ee5e90be64 maint: Add encoding marker for Emacs to non-ASCII sources.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
145 */