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1 | <?php |
2 | |
3 | /** |
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4 | * global.php |
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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. |
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27 | * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this. |
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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 | /* Since we decided all IMAP servers must implement the UID command as defined in |
33 | * the IMAP RFC, we force $uid_support to be on. |
34 | */ |
35 | |
36 | global $uid_support; |
37 | $uid_support = true; |
38 | |
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39 | sqsession_is_active(); |
40 | |
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41 | /* convert old-style superglobals to current method |
42 | * this is executed if you are running PHP 4.0.x. |
43 | * it is run via a require_once directive in validate.php |
44 | * and redirect.php. Patch submitted by Ray Black. |
45 | */ |
46 | |
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47 | if ( !check_php_version(4,1) ) { |
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48 | global $_COOKIE, $_ENV, $_FILES, $_GET, $_POST, $_SERVER, $_SESSION; |
49 | global $HTTP_COOKIE_VARS, $HTTP_ENV_VARS, $HTTP_POST_FILES, $HTTP_GET_VARS, |
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50 | $HTTP_POST_VARS, $HTTP_SERVER_VARS, $HTTP_SESSION_VARS, $PHP_SELF; |
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51 | $_COOKIE =& $HTTP_COOKIE_VARS; |
52 | $_ENV =& $HTTP_ENV_VARS; |
53 | $_FILES =& $HTTP_POST_FILES; |
54 | $_GET =& $HTTP_GET_VARS; |
55 | $_POST =& $HTTP_POST_VARS; |
56 | $_SERVER =& $HTTP_SERVER_VARS; |
57 | $_SESSION =& $HTTP_SESSION_VARS; |
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58 | if (!isset($PHP_SELF) || empty($PHP_SELF)) { |
59 | $PHP_SELF = $HTTP_SERVER_VARS['PHP_SELF']; |
60 | } |
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61 | } |
62 | |
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63 | /* if running with magic_quotes_gpc then strip the slashes |
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64 | from POST and GET global arrays */ |
65 | |
66 | if (get_magic_quotes_gpc()) { |
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67 | sqstripslashes($_GET); |
68 | sqstripslashes($_POST); |
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69 | } |
70 | |
71 | /* strip any tags added to the url from PHP_SELF. |
72 | This fixes hand crafted url XXS expoits for any |
73 | page that uses PHP_SELF as the FORM action */ |
74 | |
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75 | $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); |
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76 | |
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77 | /** |
78 | * returns true if current php version is at mimimum a.b.c |
79 | * |
80 | * Called: check_php_version(4,1) |
81 | */ |
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82 | function check_php_version ($a = '0', $b = '0', $c = '0') |
83 | { |
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84 | global $SQ_PHP_VERSION; |
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85 | |
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86 | if(!isset($SQ_PHP_VERSION)) |
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87 | $SQ_PHP_VERSION = substr( str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'), 0, 3); |
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88 | |
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89 | return $SQ_PHP_VERSION >= ($a.$b.$c); |
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90 | } |
91 | |
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92 | /** |
93 | * returns true if the current internal SM version is at minimum a.b.c |
94 | * These are plain integer comparisons, as our internal version is |
95 | * constructed by us, as an array of 3 ints. |
96 | * |
97 | * Called: check_sm_version(1,3,3) |
98 | */ |
99 | function check_sm_version($a = 0, $b = 0, $c = 0) |
100 | { |
101 | global $SQM_INTERNAL_VERSION; |
102 | if ( !isset($SQM_INTERNAL_VERSION) || |
103 | $SQM_INTERNAL_VERSION[0] < $a || |
104 | $SQM_INTERNAL_VERSION[1] < $b || |
105 | ( $SQM_INTERNAL_VERSION[1] == $b && |
106 | $SQM_INTERNAL_VERSION[2] < $c ) ) { |
107 | return FALSE; |
108 | } |
109 | return TRUE; |
110 | } |
111 | |
112 | |
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113 | /* recursively strip slashes from the values of an array */ |
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114 | function sqstripslashes(&$array) { |
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115 | if(count($array) > 0) { |
116 | foreach ($array as $index=>$value) { |
117 | if (is_array($array[$index])) { |
118 | sqstripslashes($array[$index]); |
119 | } |
120 | else { |
121 | $array[$index] = stripslashes($value); |
122 | } |
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123 | } |
124 | } |
125 | } |
126 | |
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127 | function sqsession_register ($var, $name) { |
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128 | |
129 | sqsession_is_active(); |
130 | |
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131 | if ( !check_php_version(4,1) ) { |
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132 | global $HTTP_SESSION_VARS; |
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133 | $HTTP_SESSION_VARS[$name] = $var; |
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134 | } |
135 | else { |
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136 | $_SESSION["$name"] = $var; |
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137 | } |
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138 | session_register("$name"); |
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139 | } |
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140 | |
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141 | function sqsession_unregister ($name) { |
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142 | |
143 | sqsession_is_active(); |
144 | |
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145 | if ( !check_php_version(4,1) ) { |
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146 | global $HTTP_SESSION_VARS; |
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147 | unset($HTTP_SESSION_VARS[$name]); |
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148 | } |
149 | else { |
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150 | unset($_SESSION[$name]); |
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151 | } |
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152 | session_unregister("$name"); |
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153 | } |
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154 | |
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155 | function sqsession_is_registered ($name) { |
156 | $test_name = &$name; |
157 | $result = false; |
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158 | if ( !check_php_version(4,1) ) { |
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159 | global $HTTP_SESSION_VARS; |
160 | if (isset($HTTP_SESSION_VARS[$test_name])) { |
161 | $result = true; |
162 | } |
163 | } |
164 | else { |
165 | if (isset($_SESSION[$test_name])) { |
166 | $result = true; |
167 | } |
168 | } |
169 | return $result; |
170 | } |
171 | |
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172 | |
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173 | define('SQ_INORDER',0); |
174 | define('SQ_GET',1); |
175 | define('SQ_POST',2); |
176 | define('SQ_SESSION',3); |
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177 | define('SQ_COOKIE',4); |
178 | define('SQ_SERVER',5); |
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179 | define('SQ_FORM',6); |
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180 | |
181 | /** |
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182 | * Search for the var $name in $_SESSION, $_POST, $_GET, |
183 | * $_COOKIE, or $_SERVER and set it in provided var. |
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184 | * |
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185 | * If $search is not provided, or == SQ_INORDER, it will search |
186 | * $_SESSION, then $_POST, then $_GET. Otherwise, |
187 | * use one of the defined constants to look for |
188 | * a var in one place specifically. |
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189 | * |
190 | * Note: $search is an int value equal to one of the |
191 | * constants defined above. |
192 | * |
193 | * example: |
194 | * sqgetGlobalVar('username',$username,SQ_SESSION); |
195 | * -- no quotes around last param! |
196 | * |
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197 | * Returns FALSE if variable is not found. |
198 | * Returns TRUE if it is. |
199 | */ |
200 | function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { |
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201 | |
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202 | if ( !check_php_version(4,1) ) { |
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203 | global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $HTTP_POST_VARS, |
204 | $HTTP_SERVER_VARS, $HTTP_SESSION_VARS; |
205 | |
206 | $_COOKIE =& $HTTP_COOKIE_VARS; |
207 | $_GET =& $HTTP_GET_VARS; |
208 | $_POST =& $HTTP_POST_VARS; |
209 | $_SERVER =& $HTTP_SERVER_VARS; |
210 | $_SESSION =& $HTTP_SESSION_VARS; |
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211 | } |
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212 | |
213 | /* NOTE: DO NOT enclose the constants in the switch |
214 | statement with quotes. They are constant values, |
215 | enclosing them in quotes will cause them to evaluate |
216 | as strings. */ |
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217 | switch ($search) { |
218 | /* we want the default case to be first here, |
219 | so that if a valid value isn't specified, |
220 | all three arrays will be searched. */ |
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221 | default: |
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222 | case SQ_INORDER: // check session, post, get |
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223 | case SQ_SESSION: |
224 | if( isset($_SESSION[$name]) ) { |
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225 | $value = $_SESSION[$name]; |
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226 | return TRUE; |
227 | } elseif ( $search == SQ_SESSION ) { |
228 | break; |
229 | } |
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230 | case SQ_FORM: // check post, get |
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231 | case SQ_POST: |
232 | if( isset($_POST[$name]) ) { |
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233 | $value = $_POST[$name]; |
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234 | return TRUE; |
235 | } elseif ( $search == SQ_POST ) { |
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236 | break; |
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237 | } |
238 | case SQ_GET: |
239 | if ( isset($_GET[$name]) ) { |
240 | $value = $_GET[$name]; |
241 | return TRUE; |
242 | } |
243 | /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ |
244 | break; |
245 | case SQ_COOKIE: |
246 | if ( isset($_COOKIE[$name]) ) { |
247 | $value = $_COOKIE[$name]; |
248 | return TRUE; |
249 | } |
250 | break; |
251 | case SQ_SERVER: |
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252 | if ( isset($_SERVER[$name]) ) { |
253 | $value = $_SERVER[$name]; |
254 | return TRUE; |
255 | } |
256 | break; |
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257 | } |
258 | return FALSE; |
259 | } |
260 | |
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261 | function sqsession_destroy() { |
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262 | |
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263 | /* |
264 | * php.net says we can kill the cookie by setting just the name: |
265 | * http://www.php.net/manual/en/function.setcookie.php |
266 | * maybe this will help fix the session merging again. |
267 | * |
268 | * Changed the theory on this to kill the cookies first starting |
269 | * a new session will provide a new session for all instances of |
270 | * the browser, we don't want that, as that is what is causing the |
271 | * merging of sessions. |
272 | */ |
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273 | |
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274 | global $base_uri; |
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275 | |
276 | if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time() - 5, $base_uri); |
277 | if (isset($_COOKIE['username'])) setcookie('username','',time() - 5,$base_uri); |
278 | if (isset($_COOKIE['key'])) setcookie('key','',time() - 5,$base_uri); |
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279 | |
280 | $sessid = session_id(); |
281 | if (!empty( $sessid )) { |
282 | if ( !check_php_version(4,1) ) { |
283 | global $HTTP_SESSION_VARS; |
284 | $HTTP_SESSION_VARS = array(); |
285 | } else { |
286 | $_SESSION = array(); |
287 | } |
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288 | @session_destroy(); |
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289 | } |
290 | |
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291 | } |
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292 | |
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293 | /* |
294 | * Function to verify a session has been started. If it hasn't |
295 | * start a session up. php.net doesn't tell you that $_SESSION |
296 | * (even though autoglobal), is not created unless a session is |
297 | * started, unlike $_POST, $_GET and such |
298 | */ |
299 | |
300 | function sqsession_is_active() { |
301 | |
302 | $sessid = session_id(); |
303 | if ( empty( $sessid ) ) { |
304 | session_start(); |
305 | } |
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306 | } |
307 | |
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308 | |
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309 | ?> |