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1 | <?php |
2 | |
3 | /** |
4 | * globals.php |
5 | * |
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6 | * Copyright (c) 1999-2003 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This includes code to update < 4.1.0 globals to the newer format |
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10 | * It also has some session register functions that work across various |
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11 | * php versions. |
12 | * |
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13 | * $Id$ |
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14 | */ |
15 | |
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16 | require_once(SM_PATH . 'config/config.php'); |
17 | |
18 | /* set the name of the session cookie */ |
19 | if(isset($session_name) && $session_name) { |
20 | ini_set('session.name' , $session_name); |
21 | } else { |
22 | ini_set('session.name' , 'SQMSESSID'); |
23 | } |
24 | |
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25 | /* If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways. |
26 | * Force magic_quotes_runtime off. |
27 | * chilts@birdbrained.org - I put it here in the hopes that all SM code includes this. |
28 | * If there's a better place, please let me know. |
29 | */ |
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30 | ini_set('magic_quotes_runtime','0'); |
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31 | |
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32 | sqsession_is_active(); |
33 | |
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34 | /* convert old-style superglobals to current method |
35 | * this is executed if you are running PHP 4.0.x. |
36 | * it is run via a require_once directive in validate.php |
37 | * and redirect.php. Patch submitted by Ray Black. |
38 | */ |
39 | |
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40 | if ( !check_php_version(4,1) ) { |
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41 | global $_COOKIE, $_ENV, $_FILES, $_GET, $_POST, $_SERVER, $_SESSION; |
42 | global $HTTP_COOKIE_VARS, $HTTP_ENV_VARS, $HTTP_POST_FILES, $HTTP_GET_VARS, |
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43 | $HTTP_POST_VARS, $HTTP_SERVER_VARS, $HTTP_SESSION_VARS, $PHP_SELF; |
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44 | $_COOKIE =& $HTTP_COOKIE_VARS; |
45 | $_ENV =& $HTTP_ENV_VARS; |
46 | $_FILES =& $HTTP_POST_FILES; |
47 | $_GET =& $HTTP_GET_VARS; |
48 | $_POST =& $HTTP_POST_VARS; |
49 | $_SERVER =& $HTTP_SERVER_VARS; |
50 | $_SESSION =& $HTTP_SESSION_VARS; |
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51 | if (!isset($PHP_SELF) || empty($PHP_SELF)) { |
52 | $PHP_SELF = $HTTP_SERVER_VARS['PHP_SELF']; |
53 | } |
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54 | } |
55 | |
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56 | /* if running with magic_quotes_gpc then strip the slashes |
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57 | from POST and GET global arrays */ |
58 | |
59 | if (get_magic_quotes_gpc()) { |
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60 | sqstripslashes($_GET); |
61 | sqstripslashes($_POST); |
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62 | } |
63 | |
64 | /* strip any tags added to the url from PHP_SELF. |
65 | This fixes hand crafted url XXS expoits for any |
66 | page that uses PHP_SELF as the FORM action */ |
67 | |
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68 | $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); |
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69 | |
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70 | /** |
71 | * returns true if current php version is at mimimum a.b.c |
72 | * |
73 | * Called: check_php_version(4,1) |
74 | */ |
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75 | function check_php_version ($a = '0', $b = '0', $c = '0') |
76 | { |
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77 | global $SQ_PHP_VERSION; |
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78 | |
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79 | if(!isset($SQ_PHP_VERSION)) |
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80 | $SQ_PHP_VERSION = substr( str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'), 0, 3); |
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81 | |
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82 | return $SQ_PHP_VERSION >= ($a.$b.$c); |
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83 | } |
84 | |
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85 | /** |
86 | * returns true if the current internal SM version is at minimum a.b.c |
87 | * These are plain integer comparisons, as our internal version is |
88 | * constructed by us, as an array of 3 ints. |
89 | * |
90 | * Called: check_sm_version(1,3,3) |
91 | */ |
92 | function check_sm_version($a = 0, $b = 0, $c = 0) |
93 | { |
94 | global $SQM_INTERNAL_VERSION; |
95 | if ( !isset($SQM_INTERNAL_VERSION) || |
96 | $SQM_INTERNAL_VERSION[0] < $a || |
97 | $SQM_INTERNAL_VERSION[1] < $b || |
98 | ( $SQM_INTERNAL_VERSION[1] == $b && |
99 | $SQM_INTERNAL_VERSION[2] < $c ) ) { |
100 | return FALSE; |
101 | } |
102 | return TRUE; |
103 | } |
104 | |
105 | |
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106 | /* recursively strip slashes from the values of an array */ |
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107 | function sqstripslashes(&$array) { |
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108 | if(count($array) > 0) { |
109 | foreach ($array as $index=>$value) { |
110 | if (is_array($array[$index])) { |
111 | sqstripslashes($array[$index]); |
112 | } |
113 | else { |
114 | $array[$index] = stripslashes($value); |
115 | } |
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116 | } |
117 | } |
118 | } |
119 | |
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120 | function sqsession_register ($var, $name) { |
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121 | |
122 | sqsession_is_active(); |
123 | |
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124 | if ( !check_php_version(4,1) ) { |
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125 | global $HTTP_SESSION_VARS; |
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126 | $HTTP_SESSION_VARS[$name] = $var; |
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127 | } |
128 | else { |
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129 | $_SESSION["$name"] = $var; |
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130 | } |
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131 | session_register("$name"); |
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132 | } |
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133 | |
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134 | function sqsession_unregister ($name) { |
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135 | |
136 | sqsession_is_active(); |
137 | |
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138 | if ( !check_php_version(4,1) ) { |
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139 | global $HTTP_SESSION_VARS; |
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140 | unset($HTTP_SESSION_VARS[$name]); |
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141 | } |
142 | else { |
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143 | unset($_SESSION[$name]); |
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144 | } |
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145 | session_unregister("$name"); |
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146 | } |
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147 | |
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148 | function sqsession_is_registered ($name) { |
149 | $test_name = &$name; |
150 | $result = false; |
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151 | if ( !check_php_version(4,1) ) { |
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152 | global $HTTP_SESSION_VARS; |
153 | if (isset($HTTP_SESSION_VARS[$test_name])) { |
154 | $result = true; |
155 | } |
156 | } |
157 | else { |
158 | if (isset($_SESSION[$test_name])) { |
159 | $result = true; |
160 | } |
161 | } |
162 | return $result; |
163 | } |
164 | |
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165 | |
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166 | define('SQ_INORDER',0); |
167 | define('SQ_GET',1); |
168 | define('SQ_POST',2); |
169 | define('SQ_SESSION',3); |
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170 | define('SQ_COOKIE',4); |
171 | define('SQ_SERVER',5); |
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172 | define('SQ_FORM',6); |
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173 | |
174 | /** |
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175 | * Search for the var $name in $_SESSION, $_POST, $_GET, |
176 | * $_COOKIE, or $_SERVER and set it in provided var. |
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177 | * |
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178 | * If $search is not provided, or == SQ_INORDER, it will search |
179 | * $_SESSION, then $_POST, then $_GET. Otherwise, |
180 | * use one of the defined constants to look for |
181 | * a var in one place specifically. |
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182 | * |
183 | * Note: $search is an int value equal to one of the |
184 | * constants defined above. |
185 | * |
186 | * example: |
187 | * sqgetGlobalVar('username',$username,SQ_SESSION); |
188 | * -- no quotes around last param! |
189 | * |
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190 | * Returns FALSE if variable is not found. |
191 | * Returns TRUE if it is. |
192 | */ |
193 | function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { |
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194 | |
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195 | if ( !check_php_version(4,1) ) { |
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196 | global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $HTTP_POST_VARS, |
197 | $HTTP_SERVER_VARS, $HTTP_SESSION_VARS; |
198 | |
199 | $_COOKIE =& $HTTP_COOKIE_VARS; |
200 | $_GET =& $HTTP_GET_VARS; |
201 | $_POST =& $HTTP_POST_VARS; |
202 | $_SERVER =& $HTTP_SERVER_VARS; |
203 | $_SESSION =& $HTTP_SESSION_VARS; |
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204 | } |
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205 | |
206 | /* NOTE: DO NOT enclose the constants in the switch |
207 | statement with quotes. They are constant values, |
208 | enclosing them in quotes will cause them to evaluate |
209 | as strings. */ |
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210 | switch ($search) { |
211 | /* we want the default case to be first here, |
212 | so that if a valid value isn't specified, |
213 | all three arrays will be searched. */ |
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214 | default: |
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215 | case SQ_INORDER: // check session, post, get |
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216 | case SQ_SESSION: |
217 | if( isset($_SESSION[$name]) ) { |
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218 | $value = $_SESSION[$name]; |
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219 | return TRUE; |
220 | } elseif ( $search == SQ_SESSION ) { |
221 | break; |
222 | } |
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223 | case SQ_FORM: // check post, get |
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224 | case SQ_POST: |
225 | if( isset($_POST[$name]) ) { |
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226 | $value = $_POST[$name]; |
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227 | return TRUE; |
228 | } elseif ( $search == SQ_POST ) { |
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229 | break; |
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230 | } |
231 | case SQ_GET: |
232 | if ( isset($_GET[$name]) ) { |
233 | $value = $_GET[$name]; |
234 | return TRUE; |
235 | } |
236 | /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ |
237 | break; |
238 | case SQ_COOKIE: |
239 | if ( isset($_COOKIE[$name]) ) { |
240 | $value = $_COOKIE[$name]; |
241 | return TRUE; |
242 | } |
243 | break; |
244 | case SQ_SERVER: |
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245 | if ( isset($_SERVER[$name]) ) { |
246 | $value = $_SERVER[$name]; |
247 | return TRUE; |
248 | } |
249 | break; |
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250 | } |
251 | return FALSE; |
252 | } |
253 | |
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254 | function sqsession_destroy() { |
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255 | |
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256 | /* |
257 | * php.net says we can kill the cookie by setting just the name: |
258 | * http://www.php.net/manual/en/function.setcookie.php |
259 | * maybe this will help fix the session merging again. |
260 | * |
261 | * Changed the theory on this to kill the cookies first starting |
262 | * a new session will provide a new session for all instances of |
263 | * the browser, we don't want that, as that is what is causing the |
264 | * merging of sessions. |
265 | */ |
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266 | |
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267 | global $base_uri; |
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268 | |
269 | if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time() - 5, $base_uri); |
270 | if (isset($_COOKIE['username'])) setcookie('username','',time() - 5,$base_uri); |
271 | if (isset($_COOKIE['key'])) setcookie('key','',time() - 5,$base_uri); |
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272 | |
273 | $sessid = session_id(); |
274 | if (!empty( $sessid )) { |
275 | if ( !check_php_version(4,1) ) { |
276 | global $HTTP_SESSION_VARS; |
277 | $HTTP_SESSION_VARS = array(); |
278 | } else { |
279 | $_SESSION = array(); |
280 | } |
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281 | @session_destroy(); |
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282 | } |
283 | |
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284 | } |
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285 | |
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286 | /* |
287 | * Function to verify a session has been started. If it hasn't |
288 | * start a session up. php.net doesn't tell you that $_SESSION |
289 | * (even though autoglobal), is not created unless a session is |
290 | * started, unlike $_POST, $_GET and such |
291 | */ |
292 | |
293 | function sqsession_is_active() { |
294 | |
295 | $sessid = session_id(); |
296 | if ( empty( $sessid ) ) { |
297 | session_start(); |
298 | } |
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299 | } |
300 | |
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301 | |
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302 | ?> |