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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) 1999-2004 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 | * @package squirrelmail |
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15 | */ |
16 | |
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17 | /** Bring in the config file. */ |
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18 | require_once(SM_PATH . 'config/config.php'); |
19 | |
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20 | /** set the name of the session cookie */ |
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21 | if(isset($session_name) && $session_name) { |
22 | ini_set('session.name' , $session_name); |
23 | } else { |
24 | ini_set('session.name' , 'SQMSESSID'); |
25 | } |
26 | |
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27 | /** If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways. |
28 | * Force magic_quotes_runtime off. |
29 | * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this. |
30 | * If there's a better place, please let me know. |
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31 | */ |
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32 | ini_set('magic_quotes_runtime','0'); |
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33 | |
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34 | /* Since we decided all IMAP servers must implement the UID command as defined in |
35 | * the IMAP RFC, we force $uid_support to be on. |
36 | */ |
37 | |
38 | global $uid_support; |
39 | $uid_support = true; |
40 | |
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41 | sqsession_is_active(); |
42 | |
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43 | /* if running with magic_quotes_gpc then strip the slashes |
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44 | from POST and GET global arrays */ |
45 | |
46 | if (get_magic_quotes_gpc()) { |
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47 | sqstripslashes($_GET); |
48 | sqstripslashes($_POST); |
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49 | } |
50 | |
51 | /* strip any tags added to the url from PHP_SELF. |
52 | This fixes hand crafted url XXS expoits for any |
53 | page that uses PHP_SELF as the FORM action */ |
54 | |
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55 | $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); |
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56 | |
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57 | /** |
58 | * returns true if current php version is at mimimum a.b.c |
59 | * |
60 | * Called: check_php_version(4,1) |
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61 | * @param int a major version number |
62 | * @param int b minor version number |
63 | * @param int c release number |
64 | * @return bool |
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65 | */ |
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66 | function check_php_version ($a = '0', $b = '0', $c = '0') |
67 | { |
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68 | global $SQ_PHP_VERSION; |
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69 | |
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70 | if(!isset($SQ_PHP_VERSION)) |
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71 | $SQ_PHP_VERSION = substr( str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'), 0, 3); |
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72 | |
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73 | return $SQ_PHP_VERSION >= ($a.$b.$c); |
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74 | } |
75 | |
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76 | /** |
77 | * returns true if the current internal SM version is at minimum a.b.c |
78 | * These are plain integer comparisons, as our internal version is |
79 | * constructed by us, as an array of 3 ints. |
80 | * |
81 | * Called: check_sm_version(1,3,3) |
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82 | * @param int a major version number |
83 | * @param int b minor version number |
84 | * @param int c release number |
85 | * @return bool |
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86 | */ |
87 | function check_sm_version($a = 0, $b = 0, $c = 0) |
88 | { |
89 | global $SQM_INTERNAL_VERSION; |
90 | if ( !isset($SQM_INTERNAL_VERSION) || |
91 | $SQM_INTERNAL_VERSION[0] < $a || |
92 | $SQM_INTERNAL_VERSION[1] < $b || |
93 | ( $SQM_INTERNAL_VERSION[1] == $b && |
94 | $SQM_INTERNAL_VERSION[2] < $c ) ) { |
95 | return FALSE; |
96 | } |
97 | return TRUE; |
98 | } |
99 | |
100 | |
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101 | /** |
102 | * Recursively strip slashes from the values of an array. |
103 | * @param array array the array to strip, passed by reference |
104 | * @return void |
105 | */ |
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106 | function sqstripslashes(&$array) { |
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107 | if(count($array) > 0) { |
108 | foreach ($array as $index=>$value) { |
109 | if (is_array($array[$index])) { |
110 | sqstripslashes($array[$index]); |
111 | } |
112 | else { |
113 | $array[$index] = stripslashes($value); |
114 | } |
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115 | } |
116 | } |
117 | } |
118 | |
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119 | /** |
120 | * Add a variable to the session. |
121 | * @param mixed $var the variable to register |
122 | * @param string $name the name to refer to this variable |
123 | * @return void |
124 | */ |
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125 | function sqsession_register ($var, $name) { |
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126 | |
127 | sqsession_is_active(); |
128 | |
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129 | $_SESSION["$name"] = $var; |
130 | |
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131 | session_register("$name"); |
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132 | } |
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133 | |
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134 | /** |
135 | * Delete a variable from the session. |
136 | * @param string $name the name of the var to delete |
137 | * @return void |
138 | */ |
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139 | function sqsession_unregister ($name) { |
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140 | |
141 | sqsession_is_active(); |
142 | |
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143 | unset($_SESSION[$name]); |
144 | |
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145 | session_unregister("$name"); |
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146 | } |
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147 | |
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148 | /** |
149 | * Checks to see if a variable has already been registered |
150 | * in the session. |
151 | * @param string $name the name of the var to check |
152 | * @return bool whether the var has been registered |
153 | */ |
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154 | function sqsession_is_registered ($name) { |
155 | $test_name = &$name; |
156 | $result = false; |
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157 | |
158 | if (isset($_SESSION[$test_name])) { |
159 | $result = true; |
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160 | } |
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161 | |
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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 | * @param string name the name of the var to search |
191 | * @param mixed value the variable to return |
192 | * @param int search constant defining where to look |
193 | * @return bool whether variable is found. |
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194 | */ |
195 | function sqgetGlobalVar($name, &$value, $search = SQ_INORDER) { |
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196 | |
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197 | /* NOTE: DO NOT enclose the constants in the switch |
198 | statement with quotes. They are constant values, |
199 | enclosing them in quotes will cause them to evaluate |
200 | as strings. */ |
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201 | switch ($search) { |
202 | /* we want the default case to be first here, |
203 | so that if a valid value isn't specified, |
204 | all three arrays will be searched. */ |
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205 | default: |
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206 | case SQ_INORDER: // check session, post, get |
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207 | case SQ_SESSION: |
208 | if( isset($_SESSION[$name]) ) { |
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209 | $value = $_SESSION[$name]; |
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210 | return TRUE; |
211 | } elseif ( $search == SQ_SESSION ) { |
212 | break; |
213 | } |
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214 | case SQ_FORM: // check post, get |
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215 | case SQ_POST: |
216 | if( isset($_POST[$name]) ) { |
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217 | $value = $_POST[$name]; |
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218 | return TRUE; |
219 | } elseif ( $search == SQ_POST ) { |
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220 | break; |
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221 | } |
222 | case SQ_GET: |
223 | if ( isset($_GET[$name]) ) { |
224 | $value = $_GET[$name]; |
225 | return TRUE; |
226 | } |
227 | /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ |
228 | break; |
229 | case SQ_COOKIE: |
230 | if ( isset($_COOKIE[$name]) ) { |
231 | $value = $_COOKIE[$name]; |
232 | return TRUE; |
233 | } |
234 | break; |
235 | case SQ_SERVER: |
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236 | if ( isset($_SERVER[$name]) ) { |
237 | $value = $_SERVER[$name]; |
238 | return TRUE; |
239 | } |
240 | break; |
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241 | } |
242 | return FALSE; |
243 | } |
244 | |
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245 | /** |
246 | * Deletes an existing session, more advanced than the standard PHP |
247 | * session_destroy(), it explicitly deletes the cookies and global vars. |
248 | */ |
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249 | function sqsession_destroy() { |
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250 | |
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251 | /* |
252 | * php.net says we can kill the cookie by setting just the name: |
253 | * http://www.php.net/manual/en/function.setcookie.php |
254 | * maybe this will help fix the session merging again. |
255 | * |
256 | * Changed the theory on this to kill the cookies first starting |
257 | * a new session will provide a new session for all instances of |
258 | * the browser, we don't want that, as that is what is causing the |
259 | * merging of sessions. |
260 | */ |
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261 | |
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262 | global $base_uri; |
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263 | |
264 | if (isset($_COOKIE[session_name()])) setcookie(session_name(), '', time() - 5, $base_uri); |
265 | if (isset($_COOKIE['username'])) setcookie('username','',time() - 5,$base_uri); |
266 | if (isset($_COOKIE['key'])) setcookie('key','',time() - 5,$base_uri); |
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267 | |
268 | $sessid = session_id(); |
269 | if (!empty( $sessid )) { |
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270 | $_SESSION = array(); |
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271 | @session_destroy(); |
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272 | } |
273 | |
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274 | } |
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275 | |
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276 | /** |
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277 | * Function to verify a session has been started. If it hasn't |
278 | * start a session up. php.net doesn't tell you that $_SESSION |
279 | * (even though autoglobal), is not created unless a session is |
280 | * started, unlike $_POST, $_GET and such |
281 | */ |
282 | |
283 | function sqsession_is_active() { |
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284 | |
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285 | $sessid = session_id(); |
286 | if ( empty( $sessid ) ) { |
287 | session_start(); |
288 | } |
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289 | } |
290 | |
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291 | |
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292 | ?> |