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