Mercurial > cpython-lru_cache-weakref

annotate Modules/md5module.c @ 12357:5b59ea41db4e legacy-trunk

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Install the docs (with fewer rules). Add descriptions for the system variables.
author Guido van Rossum <guido@python.org>
date Mon, 10 Apr 2000 19:36:27 +0000
parents dc65c5f6ad7c
children 1c7c2dd1beb1
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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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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 char update_doc [] =
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98 "update (arg)\n\
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99 \n\
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100 Update the md5 object with the string arg. Repeated calls are\n\
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101 equivalent to a single call with the concatenation of all the\n\
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102 arguments.";
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103
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104
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105 static PyObject *
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106 md5_digest(self, args)
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107 md5object *self;
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108 PyObject *args;
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109 {
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110
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111 MD5_CTX mdContext;
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112 unsigned char aDigest[16];
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113
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114 if (!PyArg_NoArgs(args))
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115 return NULL;
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116
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117 /* make a temporary copy, and perform the final */
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118 mdContext = self->md5;
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119 MD5Final(aDigest, &mdContext);
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120
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121 return PyString_FromStringAndSize((char *)aDigest, 16);
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122 }
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123
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124 static char digest_doc [] =
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125 "digest() -> string\n\
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126 \n\
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127 Return the digest of the strings passed to the update() method so\n\
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128 far. This is an 16-byte string which may contain non-ASCII characters,\n\
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129 including null bytes.";
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130
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131
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132 static PyObject *
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133 md5_copy(self, args)
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134 md5object *self;
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135 PyObject *args;
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136 {
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137 md5object *md5p;
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138
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139 if (!PyArg_NoArgs(args))
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140 return NULL;
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141
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142 if ((md5p = newmd5object()) == NULL)
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143 return NULL;
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144
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145 md5p->md5 = self->md5;
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146
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147 return (PyObject *)md5p;
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148 }
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149
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150 static char copy_doc [] =
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151 "copy() -> md5 object\n\
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152 \n\
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153 Return a copy (``clone'') of the md5 object.";
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154
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155
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156 static PyMethodDef md5_methods[] = {
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157 {"update", (PyCFunction)md5_update, 0, update_doc},
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158 {"digest", (PyCFunction)md5_digest, 0, digest_doc},
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159 {"copy", (PyCFunction)md5_copy, 0, copy_doc},
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160 {NULL, NULL} /* sentinel */
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161 };
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162
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163 static PyObject *
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164 md5_getattr(self, name)
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165 md5object *self;
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166 char *name;
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167 {
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168 return Py_FindMethod(md5_methods, (PyObject *)self, name);
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169 }
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170
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171 static char module_doc [] =
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172
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173 "This module implements the interface to RSA's MD5 message digest\n\
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174 algorithm (see also Internet RFC 1321). Its use is quite\n\
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175 straightforward: use the new() to create an md5 object. You can now\n\
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176 feed this object with arbitrary strings using the update() method, and\n\
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177 at any point you can ask it for the digest (a strong kind of 128-bit\n\
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178 checksum, a.k.a. ``fingerprint'') of the contatenation of the strings\n\
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179 fed to it so far using the digest() method.\n\
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180 \n\
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181 Functions:\n\
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182 \n\
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183 new([arg]) -- return a new md5 object, initialized with arg if provided\n\
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184 md5([arg]) -- DEPRECATED, same as new, but for compatibility\n\
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185 \n\
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186 Special Objects:\n\
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187 \n\
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188 MD5Type -- type object for md5 objects\n\
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189 ";
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190
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191 static char md5type_doc [] =
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192 "An md5 represents the object used to calculate the MD5 checksum of a\n\
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193 string of information.\n\
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194 \n\
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195 Methods:\n\
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196 \n\
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197 update() -- updates the current digest with an additional string\n\
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198 digest() -- return the current digest value\n\
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199 copy() -- return a copy of the current md5 object\n\
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200 ";
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201
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202 statichere PyTypeObject MD5type = {
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203 PyObject_HEAD_INIT(NULL)
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204 0, /*ob_size*/
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205 "md5", /*tp_name*/
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206 sizeof(md5object), /*tp_size*/
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207 0, /*tp_itemsize*/
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208 /* methods */
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209 (destructor)md5_dealloc, /*tp_dealloc*/
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210 0, /*tp_print*/
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211 (getattrfunc)md5_getattr, /*tp_getattr*/
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212 0, /*tp_setattr*/
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213 0, /*tp_compare*/
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214 0, /*tp_repr*/
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215 0, /*tp_as_number*/
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216 0, /*tp_as_sequence*/
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217 0, /*tp_as_mapping*/
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218 0, /*tp_hash*/
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219 0, /*tp_call*/
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220 0, /*tp_str*/
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221 0, /*tp_getattro*/
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222 0, /*tp_setattro*/
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223 0, /*tp_as_buffer*/
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224 0, /*tp_xxx4*/
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225 md5type_doc, /*tp_doc*/
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226 };
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227
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228
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229 /* MD5 functions */
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230
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231 static PyObject *
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232 MD5_new(self, args)
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233 PyObject *self;
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234 PyObject *args;
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235 {
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236 md5object *md5p;
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237 unsigned char *cp = NULL;
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238 int len = 0;
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239
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240 if (!PyArg_ParseTuple(args, "|s#:new", &cp, &len))
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241 return NULL;
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242
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243 if ((md5p = newmd5object()) == NULL)
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244 return NULL;
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245
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246 if (cp)
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247 MD5Update(&md5p->md5, cp, len);
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248
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249 return (PyObject *)md5p;
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250 }
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251
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252 static char new_doc [] =
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253 "new([arg]) -> md5 object\n\
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254 \n\
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255 Return a new md5 object. If arg is present, the method call update(arg)\n\
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256 is made.";
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257
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258
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259 /* List of functions exported by this module */
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260
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261 static PyMethodDef md5_functions[] = {
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262 {"new", (PyCFunction)MD5_new, 1, new_doc},
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263 {"md5", (PyCFunction)MD5_new, 1, new_doc}, /* Backward compatibility */
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264 {NULL, NULL} /* Sentinel */
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265 };
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266
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267
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268 /* Initialize this module. */
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269
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270 DL_EXPORT(void)
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271 initmd5()
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272 {
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273 PyObject *m, *d;
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274
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275 MD5type.ob_type = &PyType_Type;
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276 m = Py_InitModule3("md5", md5_functions, module_doc);
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277 d = PyModule_GetDict(m);
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278 PyDict_SetItemString(d, "MD5Type", (PyObject *)&MD5type);
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279 /* No need to check the error here, the caller will do that */
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280 }