Mercurial > cpython-lru_cache-weakref

annotate Modules/md5module.c @ 5817:48b94de85bf3 legacy-trunk

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author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 49745ddb4f69
children f351c64c82ed
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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 "Python.h"
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43 #include "md5.h"
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44
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45 typedef struct {
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46 PyObject_HEAD
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47 MD5_CTX md5; /* the context holder */
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48 } md5object;
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49
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50 staticforward PyTypeObject MD5type;
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51
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52 #define is_md5object(v) ((v)->ob_type == &MD5type)
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53
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54 static md5object *
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55 newmd5object()
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56 {
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57 md5object *md5p;
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58
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59 md5p = PyObject_NEW(md5object, &MD5type);
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60 if (md5p == NULL)
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61 return NULL;
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62
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63 MD5Init(&md5p->md5); /* actual initialisation */
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64 return md5p;
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65 }
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66
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67
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68 /* MD5 methods */
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69
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70 static void
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71 md5_dealloc(md5p)
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72 md5object *md5p;
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73 {
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74 PyMem_DEL(md5p);
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75 }
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76
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77
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78 /* MD5 methods-as-attributes */
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79
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80 static PyObject *
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81 md5_update(self, args)
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82 md5object *self;
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83 PyObject *args;
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84 {
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85 unsigned char *cp;
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86 int len;
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87
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88 if (!PyArg_Parse(args, "s#", &cp, &len))
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89 return NULL;
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90
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91 MD5Update(&self->md5, cp, len);
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92
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93 Py_INCREF(Py_None);
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94 return Py_None;
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95 }
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96
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97 static PyObject *
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98 md5_digest(self, args)
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99 md5object *self;
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100 PyObject *args;
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101 {
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102
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103 MD5_CTX mdContext;
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104 unsigned char aDigest[16];
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105
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106 if (!PyArg_NoArgs(args))
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107 return NULL;
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108
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109 /* make a temporary copy, and perform the final */
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110 mdContext = self->md5;
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111 MD5Final(aDigest, &mdContext);
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112
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113 return PyString_FromStringAndSize((char *)aDigest, 16);
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114 }
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115
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116 static PyObject *
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117 md5_copy(self, args)
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118 md5object *self;
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119 PyObject *args;
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120 {
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121 md5object *md5p;
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122
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123 if (!PyArg_NoArgs(args))
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124 return NULL;
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125
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126 if ((md5p = newmd5object()) == NULL)
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127 return NULL;
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128
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129 md5p->md5 = self->md5;
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130
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131 return (PyObject *)md5p;
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132 }
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133
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134 static PyMethodDef md5_methods[] = {
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135 {"update", (PyCFunction)md5_update},
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136 {"digest", (PyCFunction)md5_digest},
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137 {"copy", (PyCFunction)md5_copy},
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138 {NULL, NULL} /* sentinel */
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139 };
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140
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141 static PyObject *
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142 md5_getattr(self, name)
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143 md5object *self;
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144 char *name;
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145 {
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146 return Py_FindMethod(md5_methods, (PyObject *)self, name);
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147 }
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148
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149 statichere PyTypeObject MD5type = {
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150 PyObject_HEAD_INIT(&PyType_Type)
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151 0, /*ob_size*/
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152 "md5", /*tp_name*/
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153 sizeof(md5object), /*tp_size*/
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154 0, /*tp_itemsize*/
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155 /* methods */
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156 (destructor)md5_dealloc, /*tp_dealloc*/
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157 0, /*tp_print*/
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158 (getattrfunc)md5_getattr, /*tp_getattr*/
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159 0, /*tp_setattr*/
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160 0, /*tp_compare*/
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161 0, /*tp_repr*/
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162 0, /*tp_as_number*/
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163 };
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164
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165
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166 /* MD5 functions */
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167
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168 static PyObject *
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169 MD5_new(self, args)
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170 PyObject *self;
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171 PyObject *args;
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172 {
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173 md5object *md5p;
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174 unsigned char *cp = NULL;
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175 int len = 0;
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176
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177 if (!PyArg_ParseTuple(args, "|s#", &cp, &len))
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178 return NULL;
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179
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180 if ((md5p = newmd5object()) == NULL)
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181 return NULL;
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182
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183 if (cp)
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184 MD5Update(&md5p->md5, cp, len);
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185
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186 return (PyObject *)md5p;
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187 }
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188
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189
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190 /* List of functions exported by this module */
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191
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192 static PyMethodDef md5_functions[] = {
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193 {"new", (PyCFunction)MD5_new, 1},
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194 {"md5", (PyCFunction)MD5_new, 1}, /* Backward compatibility */
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195 {NULL, NULL} /* Sentinel */
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196 };
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197
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198
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199 /* Initialize this module. */
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200
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201 void
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202 initmd5()
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203 {
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204 (void)Py_InitModule("md5", md5_functions);
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205 }