Mercurial > cpython-lru_cache-weakref

annotate Modules/md5module.c @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 65d2d8e67da3
children 49745ddb4f69
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* MD5 module */
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33
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34 /* This module provides an interface to the RSA Data Security,
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35 Inc. MD5 Message-Digest Algorithm, described in RFC 1321.
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36 It requires the files md5c.c and md5.h (which are slightly changed
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37 from the versions in the RFC to avoid the "global.h" file.) */
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38
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39
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40 /* MD5 objects */
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41
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42 #include "allobjects.h"
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43 #include "modsupport.h"
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44
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45 #include "md5.h"
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46
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47 typedef struct {
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48 OB_HEAD
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49 MD5_CTX md5; /* the context holder */
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50 } md5object;
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51
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52 staticforward typeobject MD5type;
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53
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54 #define is_md5object(v) ((v)->ob_type == &MD5type)
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55
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56 static md5object *
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57 newmd5object()
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58 {
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59 md5object *md5p;
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60
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61 md5p = NEWOBJ(md5object, &MD5type);
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62 if (md5p == NULL)
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63 return NULL;
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64
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65 MD5Init(&md5p->md5); /* actual initialisation */
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66 return md5p;
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67 }
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69
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70 /* MD5 methods */
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71
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72 static void
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73 md5_dealloc(md5p)
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74 md5object *md5p;
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75 {
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76 DEL(md5p);
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77 }
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78
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79
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80 /* MD5 methods-as-attributes */
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81
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82 static object *
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83 md5_update(self, args)
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84 md5object *self;
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85 object *args;
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86 {
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87 unsigned char *cp;
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88 int len;
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89
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90 if (!getargs(args, "s#", &cp, &len))
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91 return NULL;
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92
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93 MD5Update(&self->md5, cp, len);
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94
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95 INCREF(None);
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96 return None;
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97 }
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98
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99 static object *
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100 md5_digest(self, args)
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101 md5object *self;
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102 object *args;
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103 {
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104
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105 MD5_CTX mdContext;
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106 unsigned char aDigest[16];
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107
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108 if (!getnoarg(args))
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109 return NULL;
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110
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111 /* make a temporary copy, and perform the final */
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112 mdContext = self->md5;
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113 MD5Final(aDigest, &mdContext);
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114
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115 return newsizedstringobject((char *)aDigest, 16);
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116 }
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117
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118 static object *
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119 md5_copy(self, args)
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120 md5object *self;
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121 object *args;
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122 {
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123 md5object *md5p;
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124
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125 if (!getnoarg(args))
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126 return NULL;
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127
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128 if ((md5p = newmd5object()) == NULL)
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129 return NULL;
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130
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131 md5p->md5 = self->md5;
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132
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133 return (object *)md5p;
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134 }
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135
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136 static struct methodlist md5_methods[] = {
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137 {"update", (method)md5_update},
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138 {"digest", (method)md5_digest},
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139 {"copy", (method)md5_copy},
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140 {NULL, NULL} /* sentinel */
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141 };
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142
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143 static object *
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144 md5_getattr(self, name)
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145 md5object *self;
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146 char *name;
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147 {
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148 return findmethod(md5_methods, (object *)self, name);
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149 }
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150
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151 statichere typeobject MD5type = {
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152 OB_HEAD_INIT(&Typetype)
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153 0, /*ob_size*/
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154 "md5", /*tp_name*/
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155 sizeof(md5object), /*tp_size*/
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156 0, /*tp_itemsize*/
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157 /* methods */
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158 (destructor)md5_dealloc, /*tp_dealloc*/
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159 0, /*tp_print*/
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160 (getattrfunc)md5_getattr, /*tp_getattr*/
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161 0, /*tp_setattr*/
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162 0, /*tp_compare*/
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163 0, /*tp_repr*/
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164 0, /*tp_as_number*/
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165 };
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166
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167
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168 /* MD5 functions */
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169
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170 static object *
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171 MD5_new(self, args)
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172 object *self;
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173 object *args;
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174 {
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175 md5object *md5p;
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176 unsigned char *cp = NULL;
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177 int len = 0;
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178
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179 if (!newgetargs(args, "|s#", &cp, &len))
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180 return NULL;
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181
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182 if ((md5p = newmd5object()) == NULL)
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183 return NULL;
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184
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185 if (cp)
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186 MD5Update(&md5p->md5, cp, len);
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187
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188 return (object *)md5p;
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189 }
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190
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191
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192 /* List of functions exported by this module */
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193
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194 static struct methodlist md5_functions[] = {
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195 {"new", (method)MD5_new, 1},
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196 {"md5", (method)MD5_new, 1}, /* Backward compatibility */
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197 {NULL, NULL} /* Sentinel */
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198 };
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199
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200
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201 /* Initialize this module. */
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202
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203 void
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204 initmd5()
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205 {
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206 (void)initmodule("md5", md5_functions);
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207 }