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PHP Cross Reference of phpBB-3.2.11-deutsch |
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1 <?php 2 /** 3 * 4 * This file is part of the phpBB Forum Software package. 5 * 6 * @copyright (c) phpBB Limited <https://www.phpbb.com> 7 * @license GNU General Public License, version 2 (GPL-2.0) 8 * 9 * For full copyright and license information, please see 10 * the docs/CREDITS.txt file. 11 * 12 */ 13 14 namespace phpbb\captcha\plugins; 15 16 /** 17 * This class holds the code shared by the two default 3.0.x CAPTCHAs. 18 */ 19 abstract class captcha_abstract 20 { 21 var $confirm_id; 22 var $confirm_code; 23 var $code; 24 var $seed; 25 var $attempts = 0; 26 var $type; 27 var $solved = 0; 28 var $captcha_vars = false; 29 30 /** 31 * @var string name of the service. 32 */ 33 protected $service_name; 34 35 function init($type) 36 { 37 global $config, $request; 38 39 // read input 40 $this->confirm_id = $request->variable('confirm_id', ''); 41 $this->confirm_code = $request->variable('confirm_code', ''); 42 $refresh = $request->variable('refresh_vc', false) && $config['confirm_refresh']; 43 44 $this->type = (int) $type; 45 46 if (!strlen($this->confirm_id) || !$this->load_code()) 47 { 48 // we have no confirm ID, better get ready to display something 49 $this->generate_code(); 50 } 51 else if ($refresh) 52 { 53 $this->regenerate_code(); 54 } 55 } 56 57 function execute_demo() 58 { 59 $this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS)); 60 $this->seed = hexdec(substr(unique_id(), 4, 10)); 61 62 // compute $seed % 0x7fffffff 63 $this->seed -= 0x7fffffff * floor($this->seed / 0x7fffffff); 64 65 $generator = $this->get_generator_class(); 66 $captcha = new $generator(); 67 define('IMAGE_OUTPUT', 1); 68 $captcha->execute($this->code, $this->seed); 69 } 70 71 function execute() 72 { 73 if (empty($this->code)) 74 { 75 if (!$this->load_code()) 76 { 77 // invalid request, bail out 78 return false; 79 } 80 } 81 $generator = $this->get_generator_class(); 82 $captcha = new $generator(); 83 define('IMAGE_OUTPUT', 1); 84 $captcha->execute($this->code, $this->seed); 85 } 86 87 function get_template() 88 { 89 global $config, $user, $template, $phpEx, $phpbb_root_path; 90 91 if ($this->is_solved()) 92 { 93 return false; 94 } 95 else 96 { 97 $link = append_sid($phpbb_root_path . 'ucp.' . $phpEx, 'mode=confirm&confirm_id=' . $this->confirm_id . '&type=' . $this->type); 98 $contact_link = phpbb_get_board_contact_link($config, $phpbb_root_path, $phpEx); 99 $explain = $user->lang(($this->type != CONFIRM_POST) ? 'CONFIRM_EXPLAIN' : 'POST_CONFIRM_EXPLAIN', '<a href="' . $contact_link . '">', '</a>'); 100 101 $template->assign_vars(array( 102 'CONFIRM_IMAGE_LINK' => $link, 103 'CONFIRM_IMAGE' => '<img src="' . $link . '" />', 104 'CONFIRM_IMG' => '<img src="' . $link . '" />', 105 'CONFIRM_ID' => $this->confirm_id, 106 'S_CONFIRM_CODE' => true, 107 'S_TYPE' => $this->type, 108 'S_CONFIRM_REFRESH' => ($config['enable_confirm'] && $config['confirm_refresh'] && $this->type == CONFIRM_REG) ? true : false, 109 'L_CONFIRM_EXPLAIN' => $explain, 110 )); 111 112 return 'captcha_default.html'; 113 } 114 } 115 116 function get_demo_template($id) 117 { 118 global $config, $template, $request, $phpbb_admin_path, $phpEx; 119 120 $variables = ''; 121 122 if (is_array($this->captcha_vars)) 123 { 124 foreach ($this->captcha_vars as $captcha_var => $template_var) 125 { 126 $variables .= '&' . rawurlencode($captcha_var) . '=' . $request->variable($captcha_var, (int) $config[$captcha_var]); 127 } 128 } 129 130 // acp_captcha has a delivery function; let's use it 131 $template->assign_vars(array( 132 'CONFIRM_IMAGE' => append_sid($phpbb_admin_path . 'index.' . $phpEx, 'captcha_demo=1&mode=visual&i=' . $id . '&select_captcha=' . $this->get_service_name()) . $variables, 133 'CONFIRM_ID' => $this->confirm_id, 134 )); 135 136 return 'captcha_default_acp_demo.html'; 137 } 138 139 function get_hidden_fields() 140 { 141 $hidden_fields = array(); 142 143 // this is required for posting.php - otherwise we would forget about the captcha being already solved 144 if ($this->solved) 145 { 146 $hidden_fields['confirm_code'] = $this->confirm_code; 147 } 148 $hidden_fields['confirm_id'] = $this->confirm_id; 149 return $hidden_fields; 150 } 151 152 function garbage_collect($type) 153 { 154 global $db; 155 156 $sql = 'SELECT DISTINCT c.session_id 157 FROM ' . CONFIRM_TABLE . ' c 158 LEFT JOIN ' . SESSIONS_TABLE . ' s ON (c.session_id = s.session_id) 159 WHERE s.session_id IS NULL' . 160 ((empty($type)) ? '' : ' AND c.confirm_type = ' . (int) $type); 161 $result = $db->sql_query($sql); 162 163 if ($row = $db->sql_fetchrow($result)) 164 { 165 $sql_in = array(); 166 do 167 { 168 $sql_in[] = (string) $row['session_id']; 169 } 170 while ($row = $db->sql_fetchrow($result)); 171 172 if (count($sql_in)) 173 { 174 $sql = 'DELETE FROM ' . CONFIRM_TABLE . ' 175 WHERE ' . $db->sql_in_set('session_id', $sql_in); 176 $db->sql_query($sql); 177 } 178 } 179 $db->sql_freeresult($result); 180 } 181 182 function uninstall() 183 { 184 $this->garbage_collect(0); 185 } 186 187 function install() 188 { 189 return; 190 } 191 192 function validate() 193 { 194 global $user; 195 196 if (!$user->is_setup()) 197 { 198 $user->setup(); 199 } 200 201 $error = ''; 202 if (!$this->confirm_id) 203 { 204 $error = $user->lang['CONFIRM_CODE_WRONG']; 205 } 206 else 207 { 208 if ($this->check_code()) 209 { 210 $this->solved = true; 211 } 212 else 213 { 214 $error = $user->lang['CONFIRM_CODE_WRONG']; 215 } 216 } 217 218 if (strlen($error)) 219 { 220 // okay, incorrect answer. Let's ask a new question. 221 $this->new_attempt(); 222 return $error; 223 } 224 else 225 { 226 return false; 227 } 228 } 229 230 /** 231 * The old way to generate code, suitable for GD and non-GD. Resets the internal state. 232 */ 233 function generate_code() 234 { 235 global $db, $user; 236 237 $this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS)); 238 $this->confirm_id = md5(unique_id($user->ip)); 239 $this->seed = hexdec(substr(unique_id(), 4, 10)); 240 $this->solved = 0; 241 // compute $seed % 0x7fffffff 242 $this->seed -= 0x7fffffff * floor($this->seed / 0x7fffffff); 243 244 $sql = 'INSERT INTO ' . CONFIRM_TABLE . ' ' . $db->sql_build_array('INSERT', array( 245 'confirm_id' => (string) $this->confirm_id, 246 'session_id' => (string) $user->session_id, 247 'confirm_type' => (int) $this->type, 248 'code' => (string) $this->code, 249 'seed' => (int) $this->seed) 250 ); 251 $db->sql_query($sql); 252 } 253 254 /** 255 * New Question, if desired. 256 */ 257 function regenerate_code() 258 { 259 global $db, $user; 260 261 $this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS)); 262 $this->seed = hexdec(substr(unique_id(), 4, 10)); 263 $this->solved = 0; 264 // compute $seed % 0x7fffffff 265 $this->seed -= 0x7fffffff * floor($this->seed / 0x7fffffff); 266 267 $sql = 'UPDATE ' . CONFIRM_TABLE . ' SET ' . $db->sql_build_array('UPDATE', array( 268 'code' => (string) $this->code, 269 'seed' => (int) $this->seed)) . ' 270 WHERE 271 confirm_id = \'' . $db->sql_escape($this->confirm_id) . '\' 272 AND session_id = \'' . $db->sql_escape($user->session_id) . '\''; 273 $db->sql_query($sql); 274 } 275 276 /** 277 * New Question, if desired. 278 */ 279 function new_attempt() 280 { 281 global $db, $user; 282 283 $this->code = gen_rand_string_friendly(mt_rand(CAPTCHA_MIN_CHARS, CAPTCHA_MAX_CHARS)); 284 $this->seed = hexdec(substr(unique_id(), 4, 10)); 285 $this->solved = 0; 286 // compute $seed % 0x7fffffff 287 $this->seed -= 0x7fffffff * floor($this->seed / 0x7fffffff); 288 289 $sql = 'UPDATE ' . CONFIRM_TABLE . ' SET ' . $db->sql_build_array('UPDATE', array( 290 'code' => (string) $this->code, 291 'seed' => (int) $this->seed)) . ' 292 , attempts = attempts + 1 293 WHERE 294 confirm_id = \'' . $db->sql_escape($this->confirm_id) . '\' 295 AND session_id = \'' . $db->sql_escape($user->session_id) . '\''; 296 $db->sql_query($sql); 297 } 298 299 /** 300 * Look up everything we need for painting&checking. 301 */ 302 function load_code() 303 { 304 global $db, $user; 305 306 $sql = 'SELECT code, seed, attempts 307 FROM ' . CONFIRM_TABLE . " 308 WHERE confirm_id = '" . $db->sql_escape($this->confirm_id) . "' 309 AND session_id = '" . $db->sql_escape($user->session_id) . "' 310 AND confirm_type = " . $this->type; 311 $result = $db->sql_query($sql); 312 $row = $db->sql_fetchrow($result); 313 $db->sql_freeresult($result); 314 315 if ($row) 316 { 317 $this->code = $row['code']; 318 $this->seed = $row['seed']; 319 $this->attempts = $row['attempts']; 320 return true; 321 } 322 323 return false; 324 } 325 326 function check_code() 327 { 328 return (strcasecmp($this->code, $this->confirm_code) === 0); 329 } 330 331 function get_attempt_count() 332 { 333 return $this->attempts; 334 } 335 336 function reset() 337 { 338 global $db, $user; 339 340 $sql = 'DELETE FROM ' . CONFIRM_TABLE . " 341 WHERE session_id = '" . $db->sql_escape($user->session_id) . "' 342 AND confirm_type = " . (int) $this->type; 343 $db->sql_query($sql); 344 345 // we leave the class usable by generating a new question 346 $this->generate_code(); 347 } 348 349 function is_solved() 350 { 351 global $request; 352 353 if ($request->variable('confirm_code', false) && $this->solved === 0) 354 { 355 $this->validate(); 356 } 357 return (bool) $this->solved; 358 } 359 360 /** 361 * API function 362 */ 363 function has_config() 364 { 365 return false; 366 } 367 368 /** 369 * @return string the name of the service corresponding to the plugin 370 */ 371 function get_service_name() 372 { 373 return $this->service_name; 374 } 375 376 /** 377 * Set the name of the plugin 378 * 379 * @param string $name 380 */ 381 public function set_name($name) 382 { 383 $this->service_name = $name; 384 } 385 386 /** 387 * @return string the name of the class used to generate the captcha 388 */ 389 abstract function get_generator_class(); 390 }
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| Generated: Wed Nov 11 20:33:01 2020 | Cross-referenced by PHPXref 0.7.1 |