| commit | author | age | ||
| 9db0c8 | 1 | <?php |
| 1aceb9 | 2 | |
| A | 3 | /* |
| 4 | +-----------------------------------------------------------------------+ | |
| 5 | | program/include/rcube_utils.php | | |
| 6 | | | | |
| 7 | | This file is part of the Roundcube Webmail client | | |
| 8 | | Copyright (C) 2008-2012, The Roundcube Dev Team | | |
| 9 | | Copyright (C) 2011-2012, Kolab Systems AG | | |
| 10 | | | | |
| 11 | | Licensed under the GNU General Public License version 3 or | | |
| 12 | | any later version with exceptions for skins & plugins. | | |
| 13 | | See the README file for a full license statement. | | |
| 14 | | | | |
| 15 | | PURPOSE: | | |
| 16 | | Utility class providing common functions | | |
| 17 | +-----------------------------------------------------------------------+ | |
| 18 | | Author: Thomas Bruederli <roundcube@gmail.com> | | |
| 19 | | Author: Aleksander Machniak <alec@alec.pl> | | |
| 20 | +-----------------------------------------------------------------------+ | |
| 21 | */ | |
| 22 | ||
| 23 | ||
| 24 | /** | |
| 25 | * Utility class providing common functions | |
| 26 | * | |
| 27 | * @package Core | |
| 28 | */ | |
| 29 | class rcube_utils | |
| 30 | { | |
| 31 | // define constants for input reading | |
| 32 | const INPUT_GET = 0x0101; | |
| 33 | const INPUT_POST = 0x0102; | |
| 34 | const INPUT_GPC = 0x0103; | |
| 35 | ||
| 36 | /** | |
| 37 | * Helper method to set a cookie with the current path and host settings | |
| 38 | * | |
| 39 | * @param string Cookie name | |
| 40 | * @param string Cookie value | |
| 41 | * @param string Expiration time | |
| 42 | */ | |
| 43 | public static function setcookie($name, $value, $exp = 0) | |
| 44 | { | |
| 45 | if (headers_sent()) { | |
| 46 | return; | |
| 47 | } | |
| 48 | ||
| 49 | $cookie = session_get_cookie_params(); | |
| 09e5fc | 50 | $secure = $cookie['secure'] || self::https_check(); |
| 1aceb9 | 51 | |
| A | 52 | setcookie($name, $value, $exp, $cookie['path'], $cookie['domain'], $secure, true); |
| 53 | } | |
| 54 | ||
| 55 | /** | |
| 56 | * E-mail address validation. | |
| 57 | * | |
| 58 | * @param string $email Email address | |
| 59 | * @param boolean $dns_check True to check dns | |
| 60 | * | |
| 61 | * @return boolean True on success, False if address is invalid | |
| 62 | */ | |
| 63 | public static function check_email($email, $dns_check=true) | |
| 64 | { | |
| 65 | // Check for invalid characters | |
| 66 | if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $email)) { | |
| 67 | return false; | |
| 68 | } | |
| 69 | ||
| 70 | // Check for length limit specified by RFC 5321 (#1486453) | |
| 71 | if (strlen($email) > 254) { | |
| 72 | return false; | |
| 73 | } | |
| 74 | ||
| 75 | $email_array = explode('@', $email); | |
| 76 | ||
| 77 | // Check that there's one @ symbol | |
| 78 | if (count($email_array) < 2) { | |
| 79 | return false; | |
| 80 | } | |
| 81 | ||
| 82 | $domain_part = array_pop($email_array); | |
| 83 | $local_part = implode('@', $email_array); | |
| 84 | ||
| 85 | // from PEAR::Validate | |
| 86 | $regexp = '&^(?: | |
| 87 | ("\s*(?:[^"\f\n\r\t\v\b\s]+\s*)+")| #1 quoted name | |
| 88 | ([-\w!\#\$%\&\'*+~/^`|{}=]+(?:\.[-\w!\#\$%\&\'*+~/^`|{}=]+)*)) #2 OR dot-atom (RFC5322) | |
| 89 | $&xi'; | |
| 90 | ||
| 91 | if (!preg_match($regexp, $local_part)) { | |
| 92 | return false; | |
| 93 | } | |
| 94 | ||
| 95 | // Check domain part | |
| 96 | if (preg_match('/^\[*(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}\]*$/', $domain_part)) { | |
| 97 | return true; // IP address | |
| 98 | } | |
| 99 | else { | |
| 100 | // If not an IP address | |
| 101 | $domain_array = explode('.', $domain_part); | |
| 102 | // Not enough parts to be a valid domain | |
| 103 | if (sizeof($domain_array) < 2) { | |
| 104 | return false; | |
| 105 | } | |
| 106 | ||
| 107 | foreach ($domain_array as $part) { | |
| 108 | if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]))$/', $part)) { | |
| 109 | return false; | |
| 110 | } | |
| 111 | } | |
| 112 | ||
| 113 | $rcube = rcube::get_instance(); | |
| 114 | ||
| 115 | if (!$dns_check || !$rcube->config->get('email_dns_check')) { | |
| 116 | return true; | |
| 117 | } | |
| 118 | ||
| 119 | if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<')) { | |
| 120 | $lookup = array(); | |
| 121 | @exec("nslookup -type=MX " . escapeshellarg($domain_part) . " 2>&1", $lookup); | |
| 122 | foreach ($lookup as $line) { | |
| 123 | if (strpos($line, 'MX preference')) { | |
| 124 | return true; | |
| 125 | } | |
| 126 | } | |
| 127 | return false; | |
| 128 | } | |
| 129 | ||
| 130 | // find MX record(s) | |
| 131 | if (getmxrr($domain_part, $mx_records)) { | |
| 132 | return true; | |
| 133 | } | |
| 134 | ||
| 135 | // find any DNS record | |
| 136 | if (checkdnsrr($domain_part, 'ANY')) { | |
| 137 | return true; | |
| 138 | } | |
| 139 | } | |
| 140 | ||
| 141 | return false; | |
| 142 | } | |
| 143 | ||
| 144 | /** | |
| 145 | * Check whether the HTTP referer matches the current request | |
| 146 | * | |
| 147 | * @return boolean True if referer is the same host+path, false if not | |
| 148 | */ | |
| 149 | public static function check_referer() | |
| 150 | { | |
| 151 | $uri = parse_url($_SERVER['REQUEST_URI']); | |
| 152 | $referer = parse_url(rcube_request_header('Referer')); | |
| 153 | return $referer['host'] == rcube_request_header('Host') && $referer['path'] == $uri['path']; | |
| 154 | } | |
| 155 | ||
| 156 | ||
| 157 | /** | |
| 158 | * Replacing specials characters to a specific encoding type | |
| 159 | * | |
| 160 | * @param string Input string | |
| 161 | * @param string Encoding type: text|html|xml|js|url | |
| 162 | * @param string Replace mode for tags: show|replace|remove | |
| 163 | * @param boolean Convert newlines | |
| 164 | * | |
| 165 | * @return string The quoted string | |
| 166 | */ | |
| 167 | public static function rep_specialchars_output($str, $enctype = '', $mode = '', $newlines = true) | |
| 168 | { | |
| 169 | static $html_encode_arr = false; | |
| 170 | static $js_rep_table = false; | |
| 171 | static $xml_rep_table = false; | |
| 172 | ||
| 173 | // encode for HTML output | |
| 174 | if ($enctype == 'html') { | |
| 175 | if (!$html_encode_arr) { | |
| 176 | $html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS); | |
| 177 | unset($html_encode_arr['?']); | |
| 178 | } | |
| 179 | ||
| 180 | $encode_arr = $html_encode_arr; | |
| 181 | ||
| 182 | // don't replace quotes and html tags | |
| 183 | if ($mode == 'show' || $mode == '') { | |
| 184 | $ltpos = strpos($str, '<'); | |
| 185 | if ($ltpos !== false && strpos($str, '>', $ltpos) !== false) { | |
| 186 | unset($encode_arr['"']); | |
| 187 | unset($encode_arr['<']); | |
| 188 | unset($encode_arr['>']); | |
| 189 | unset($encode_arr['&']); | |
| 190 | } | |
| 191 | } | |
| 192 | else if ($mode == 'remove') { | |
| 193 | $str = strip_tags($str); | |
| 194 | } | |
| 195 | ||
| 196 | $out = strtr($str, $encode_arr); | |
| 197 | ||
| 198 | // avoid douple quotation of & | |
| 199 | $out = preg_replace('/&([A-Za-z]{2,6}|#[0-9]{2,4});/', '&\\1;', $out); | |
| 200 | ||
| 201 | return $newlines ? nl2br($out) : $out; | |
| 202 | } | |
| 203 | ||
| 204 | // if the replace tables for XML and JS are not yet defined | |
| 205 | if ($js_rep_table === false) { | |
| 206 | $js_rep_table = $xml_rep_table = array(); | |
| 207 | $xml_rep_table['&'] = '&'; | |
| 208 | ||
| 209 | // can be increased to support more charsets | |
| 210 | for ($c=160; $c<256; $c++) { | |
| 211 | $xml_rep_table[chr($c)] = "&#$c;"; | |
| 212 | } | |
| 213 | ||
| 214 | $xml_rep_table['"'] = '"'; | |
| 215 | $js_rep_table['"'] = '\\"'; | |
| 216 | $js_rep_table["'"] = "\\'"; | |
| 217 | $js_rep_table["\\"] = "\\\\"; | |
| 218 | // Unicode line and paragraph separators (#1486310) | |
| 219 | $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = '
'; | |
| 220 | $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = '
'; | |
| 221 | } | |
| 222 | ||
| 223 | // encode for javascript use | |
| 224 | if ($enctype == 'js') { | |
| 225 | return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table)); | |
| 226 | } | |
| 227 | ||
| 228 | // encode for plaintext | |
| 229 | if ($enctype == 'text') { | |
| 230 | return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str); | |
| 231 | } | |
| 232 | ||
| 233 | if ($enctype == 'url') { | |
| 234 | return rawurlencode($str); | |
| 235 | } | |
| 236 | ||
| 237 | // encode for XML | |
| 238 | if ($enctype == 'xml') { | |
| 239 | return strtr($str, $xml_rep_table); | |
| 240 | } | |
| 241 | ||
| 242 | // no encoding given -> return original string | |
| 243 | return $str; | |
| 244 | } | |
| 245 | ||
| 246 | ||
| 247 | /** | |
| 248 | * Read input value and convert it for internal use | |
| 249 | * Performs stripslashes() and charset conversion if necessary | |
| 250 | * | |
| 251 | * @param string Field name to read | |
| 252 | * @param int Source to get value from (GPC) | |
| 253 | * @param boolean Allow HTML tags in field value | |
| 254 | * @param string Charset to convert into | |
| 255 | * | |
| 256 | * @return string Field value or NULL if not available | |
| 257 | */ | |
| 258 | public static function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL) | |
| 259 | { | |
| 260 | $value = NULL; | |
| 261 | ||
| 262 | if ($source == self::INPUT_GET) { | |
| 263 | if (isset($_GET[$fname])) { | |
| 264 | $value = $_GET[$fname]; | |
| 265 | } | |
| 266 | } | |
| 267 | else if ($source == self::INPUT_POST) { | |
| 268 | if (isset($_POST[$fname])) { | |
| 269 | $value = $_POST[$fname]; | |
| 270 | } | |
| 271 | } | |
| 272 | else if ($source == self::INPUT_GPC) { | |
| 273 | if (isset($_POST[$fname])) { | |
| 274 | $value = $_POST[$fname]; | |
| 275 | } | |
| 276 | else if (isset($_GET[$fname])) { | |
| 277 | $value = $_GET[$fname]; | |
| 278 | } | |
| 279 | else if (isset($_COOKIE[$fname])) { | |
| 280 | $value = $_COOKIE[$fname]; | |
| 281 | } | |
| 282 | } | |
| 283 | ||
| 284 | return self::parse_input_value($value, $allow_html, $charset); | |
| 285 | } | |
| 286 | ||
| 287 | ||
| 288 | /** | |
| 289 | * Parse/validate input value. See self::get_input_value() | |
| 290 | * Performs stripslashes() and charset conversion if necessary | |
| 291 | * | |
| 292 | * @param string Input value | |
| 293 | * @param boolean Allow HTML tags in field value | |
| 294 | * @param string Charset to convert into | |
| 295 | * | |
| 296 | * @return string Parsed value | |
| 297 | */ | |
| 298 | public static function parse_input_value($value, $allow_html=FALSE, $charset=NULL) | |
| 299 | { | |
| 300 | global $OUTPUT; | |
| 301 | ||
| 302 | if (empty($value)) { | |
| 303 | return $value; | |
| 304 | } | |
| 305 | ||
| 306 | if (is_array($value)) { | |
| 307 | foreach ($value as $idx => $val) { | |
| 308 | $value[$idx] = self::parse_input_value($val, $allow_html, $charset); | |
| 309 | } | |
| 310 | return $value; | |
| 311 | } | |
| 312 | ||
| 313 | // strip single quotes if magic_quotes_sybase is enabled | |
| 314 | if (ini_get('magic_quotes_sybase')) { | |
| 315 | $value = str_replace("''", "'", $value); | |
| 316 | } | |
| 317 | // strip slashes if magic_quotes enabled | |
| 318 | else if (get_magic_quotes_gpc() || get_magic_quotes_runtime()) { | |
| 319 | $value = stripslashes($value); | |
| 320 | } | |
| 321 | ||
| 322 | // remove HTML tags if not allowed | |
| 323 | if (!$allow_html) { | |
| 324 | $value = strip_tags($value); | |
| 325 | } | |
| 326 | ||
| 327 | $output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null; | |
| 328 | ||
| 329 | // remove invalid characters (#1488124) | |
| 330 | if ($output_charset == 'UTF-8') { | |
| 331 | $value = rcube_charset::clean($value); | |
| 332 | } | |
| 333 | ||
| 334 | // convert to internal charset | |
| 335 | if ($charset && $output_charset) { | |
| 336 | $value = rcube_charset::convert($value, $output_charset, $charset); | |
| 337 | } | |
| 338 | ||
| 339 | return $value; | |
| 340 | } | |
| 341 | ||
| 342 | ||
| 343 | /** | |
| 344 | * Convert array of request parameters (prefixed with _) | |
| 345 | * to a regular array with non-prefixed keys. | |
| 346 | * | |
| 347 | * @param int $mode Source to get value from (GPC) | |
| 348 | * @param string $ignore PCRE expression to skip parameters by name | |
| 349 | * | |
| 350 | * @return array Hash array with all request parameters | |
| 351 | */ | |
| 352 | public static function request2param($mode = null, $ignore = 'task|action') | |
| 353 | { | |
| 354 | $out = array(); | |
| 355 | $src = $mode == self::INPUT_GET ? $_GET : ($mode == self::INPUT_POST ? $_POST : $_REQUEST); | |
| 356 | ||
| 357 | foreach ($src as $key => $value) { | |
| 358 | $fname = $key[0] == '_' ? substr($key, 1) : $key; | |
| 359 | if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname)) { | |
| 360 | $out[$fname] = self::get_input_value($key, $mode); | |
| 361 | } | |
| 362 | } | |
| 363 | ||
| 364 | return $out; | |
| 365 | } | |
| 366 | ||
| 367 | ||
| 368 | /** | |
| 369 | * Convert the given string into a valid HTML identifier | |
| 370 | * Same functionality as done in app.js with rcube_webmail.html_identifier() | |
| 371 | */ | |
| 372 | public static function html_identifier($str, $encode=false) | |
| 373 | { | |
| 374 | if ($encode) { | |
| 375 | return rtrim(strtr(base64_encode($str), '+/', '-_'), '='); | |
| 376 | } | |
| 377 | else { | |
| 378 | return asciiwords($str, true, '_'); | |
| 379 | } | |
| 380 | } | |
| 381 | ||
| 382 | ||
| 383 | /** | |
| 384 | * Create an edit field for inclusion on a form | |
| 385 | * | |
| 386 | * @param string col field name | |
| 387 | * @param string value field value | |
| 388 | * @param array attrib HTML element attributes for field | |
| 389 | * @param string type HTML element type (default 'text') | |
| 390 | * | |
| 391 | * @return string HTML field definition | |
| 392 | */ | |
| 393 | public static function get_edit_field($col, $value, $attrib, $type = 'text') | |
| 394 | { | |
| 395 | static $colcounts = array(); | |
| 396 | ||
| 397 | $fname = '_'.$col; | |
| 398 | $attrib['name'] = $fname . ($attrib['array'] ? '[]' : ''); | |
| 399 | $attrib['class'] = trim($attrib['class'] . ' ff_' . $col); | |
| 400 | ||
| 401 | if ($type == 'checkbox') { | |
| 402 | $attrib['value'] = '1'; | |
| 403 | $input = new html_checkbox($attrib); | |
| 404 | } | |
| 405 | else if ($type == 'textarea') { | |
| 406 | $attrib['cols'] = $attrib['size']; | |
| 407 | $input = new html_textarea($attrib); | |
| 408 | } | |
| 409 | else if ($type == 'select') { | |
| 410 | $input = new html_select($attrib); | |
| 411 | $input->add('---', ''); | |
| 412 | $input->add(array_values($attrib['options']), array_keys($attrib['options'])); | |
| 413 | } | |
| 414 | else if ($attrib['type'] == 'password') { | |
| 415 | $input = new html_passwordfield($attrib); | |
| 416 | } | |
| 417 | else { | |
| 418 | if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden') { | |
| 419 | $attrib['type'] = 'text'; | |
| 420 | } | |
| 421 | $input = new html_inputfield($attrib); | |
| 422 | } | |
| 423 | ||
| 424 | // use value from post | |
| 425 | if (isset($_POST[$fname])) { | |
| 426 | $postvalue = self::get_input_value($fname, self::INPUT_POST, true); | |
| 427 | $value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue; | |
| 428 | } | |
| 429 | ||
| 430 | $out = $input->show($value); | |
| 431 | ||
| 432 | return $out; | |
| 433 | } | |
| 434 | ||
| 435 | ||
| 436 | /** | |
| 437 | * Replace all css definitions with #container [def] | |
| 438 | * and remove css-inlined scripting | |
| 439 | * | |
| 440 | * @param string CSS source code | |
| 441 | * @param string Container ID to use as prefix | |
| 442 | * | |
| 443 | * @return string Modified CSS source | |
| 444 | */ | |
| 445 | public static function mod_css_styles($source, $container_id, $allow_remote=false) | |
| 446 | { | |
| 447 | $last_pos = 0; | |
| 448 | $replacements = new rcube_string_replacer; | |
| 449 | ||
| 450 | // ignore the whole block if evil styles are detected | |
| 451 | $source = self::xss_entity_decode($source); | |
| 452 | $stripped = preg_replace('/[^a-z\(:;]/i', '', $source); | |
| 453 | $evilexpr = 'expression|behavior|javascript:|import[^a]' . (!$allow_remote ? '|url\(' : ''); | |
| 454 | if (preg_match("/$evilexpr/i", $stripped)) { | |
| 455 | return '/* evil! */'; | |
| 456 | } | |
| 457 | ||
| 458 | // cut out all contents between { and } | |
| 459 | while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) { | |
| 460 | $styles = substr($source, $pos+1, $pos2-($pos+1)); | |
| 461 | ||
| 462 | // check every line of a style block... | |
| 463 | if ($allow_remote) { | |
| 464 | $a_styles = preg_split('/;[\r\n]*/', $styles, -1, PREG_SPLIT_NO_EMPTY); | |
| 465 | foreach ($a_styles as $line) { | |
| 466 | $stripped = preg_replace('/[^a-z\(:;]/i', '', $line); | |
| 467 | // ... and only allow strict url() values | |
| 468 | $regexp = '!url\s*\([ "\'](https?:)//[a-z0-9/._+-]+["\' ]\)!Uims'; | |
| 469 | if (stripos($stripped, 'url(') && !preg_match($regexp, $line)) { | |
| 470 | $a_styles = array('/* evil! */'); | |
| 471 | break; | |
| 472 | } | |
| 473 | } | |
| 474 | $styles = join(";\n", $a_styles); | |
| 475 | } | |
| 476 | ||
| 477 | $key = $replacements->add($styles); | |
| 478 | $source = substr($source, 0, $pos+1) | |
| 479 | . $replacements->get_replacement($key) | |
| 480 | . substr($source, $pos2, strlen($source)-$pos2); | |
| 481 | $last_pos = $pos+2; | |
| 482 | } | |
| 483 | ||
| 484 | // remove html comments and add #container to each tag selector. | |
| 485 | // also replace body definition because we also stripped off the <body> tag | |
| 486 | $styles = preg_replace( | |
| 487 | array( | |
| 488 | '/(^\s*<!--)|(-->\s*$)/', | |
| 489 | '/(^\s*|,\s*|\}\s*)([a-z0-9\._#\*][a-z0-9\.\-_]*)/im', | |
| 490 | '/'.preg_quote($container_id, '/').'\s+body/i', | |
| 491 | ), | |
| 492 | array( | |
| 493 | '', | |
| 494 | "\\1#$container_id \\2", | |
| 495 | $container_id, | |
| 496 | ), | |
| 497 | $source); | |
| 498 | ||
| 499 | // put block contents back in | |
| 500 | $styles = $replacements->resolve($styles); | |
| 501 | ||
| 502 | return $styles; | |
| 503 | } | |
| 504 | ||
| 505 | ||
| 506 | /** | |
| 507 | * Generate CSS classes from mimetype and filename extension | |
| 508 | * | |
| 509 | * @param string $mimetype Mimetype | |
| 510 | * @param string $filename Filename | |
| 511 | * | |
| 512 | * @return string CSS classes separated by space | |
| 513 | */ | |
| 514 | public static function file2class($mimetype, $filename) | |
| 515 | { | |
| 516 | list($primary, $secondary) = explode('/', $mimetype); | |
| 517 | ||
| 518 | $classes = array($primary ? $primary : 'unknown'); | |
| 519 | if ($secondary) { | |
| 520 | $classes[] = $secondary; | |
| 521 | } | |
| 522 | if (preg_match('/\.([a-z0-9]+)$/i', $filename, $m)) { | |
| 523 | $classes[] = $m[1]; | |
| 524 | } | |
| 525 | ||
| 526 | return strtolower(join(" ", $classes)); | |
| 527 | } | |
| 528 | ||
| 529 | ||
| 530 | /** | |
| 531 | * Decode escaped entities used by known XSS exploits. | |
| 532 | * See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples | |
| 533 | * | |
| 534 | * @param string CSS content to decode | |
| 535 | * | |
| 536 | * @return string Decoded string | |
| 537 | */ | |
| 538 | public static function xss_entity_decode($content) | |
| 539 | { | |
| 540 | $out = html_entity_decode(html_entity_decode($content)); | |
| 541 | $out = preg_replace_callback('/\\\([0-9a-f]{4})/i', | |
| 542 | array(self, 'xss_entity_decode_callback'), $out); | |
| 543 | $out = preg_replace('#/\*.*\*/#Ums', '', $out); | |
| 544 | ||
| 545 | return $out; | |
| 546 | } | |
| 547 | ||
| 548 | ||
| 549 | /** | |
| 550 | * preg_replace_callback callback for xss_entity_decode | |
| 551 | * | |
| 552 | * @param array $matches Result from preg_replace_callback | |
| 553 | * | |
| 554 | * @return string Decoded entity | |
| 555 | */ | |
| 556 | public static function xss_entity_decode_callback($matches) | |
| 557 | { | |
| 558 | return chr(hexdec($matches[1])); | |
| 559 | } | |
| 560 | ||
| 561 | ||
| 562 | /** | |
| 563 | * Check if we can process not exceeding memory_limit | |
| 564 | * | |
| 565 | * @param integer Required amount of memory | |
| 566 | * | |
| 567 | * @return boolean True if memory won't be exceeded, False otherwise | |
| 568 | */ | |
| 569 | public static function mem_check($need) | |
| 570 | { | |
| 571 | $mem_limit = parse_bytes(ini_get('memory_limit')); | |
| 572 | $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB | |
| 573 | ||
| 574 | return $mem_limit > 0 && $memory + $need > $mem_limit ? false : true; | |
| 575 | } | |
| 576 | ||
| 577 | ||
| 578 | /** | |
| 579 | * Check if working in SSL mode | |
| 580 | * | |
| 581 | * @param integer $port HTTPS port number | |
| 582 | * @param boolean $use_https Enables 'use_https' option checking | |
| 583 | * | |
| 584 | * @return boolean | |
| 585 | */ | |
| 586 | public static function https_check($port=null, $use_https=true) | |
| 587 | { | |
| 588 | global $RCMAIL; | |
| 589 | ||
| 590 | if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') { | |
| 591 | return true; | |
| 592 | } | |
| 593 | if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https') { | |
| 594 | return true; | |
| 595 | } | |
| 596 | if ($port && $_SERVER['SERVER_PORT'] == $port) { | |
| 597 | return true; | |
| 598 | } | |
| 599 | if ($use_https && isset($RCMAIL) && $RCMAIL->config->get('use_https')) { | |
| 600 | return true; | |
| 601 | } | |
| 602 | ||
| 603 | return false; | |
| 604 | } | |
| 605 | ||
| 606 | ||
| 607 | /** | |
| 608 | * Replaces hostname variables. | |
| 609 | * | |
| 610 | * @param string $name Hostname | |
| 611 | * @param string $host Optional IMAP hostname | |
| 612 | * | |
| 613 | * @return string Hostname | |
| 614 | */ | |
| 615 | public static function parse_host($name, $host = '') | |
| 616 | { | |
| 617 | // %n - host | |
| 618 | $n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']); | |
| d359dc | 619 | // %t - host name without first part, e.g. %n=mail.domain.tld, %t=domain.tld |
| B | 620 | $t = preg_replace('/^[^\.]+\./', '', $n); |
| 621 | // %d - domain name without first part | |
| 622 | $d = preg_replace('/^[^\.]+\./', '', $_SERVER['HTTP_HOST']); | |
| 1aceb9 | 623 | // %h - IMAP host |
| A | 624 | $h = $_SESSION['storage_host'] ? $_SESSION['storage_host'] : $host; |
| 625 | // %z - IMAP domain without first part, e.g. %h=imap.domain.tld, %z=domain.tld | |
| 626 | $z = preg_replace('/^[^\.]+\./', '', $h); | |
| 627 | // %s - domain name after the '@' from e-mail address provided at login screen. Returns FALSE if an invalid email is provided | |
| 628 | if (strpos($name, '%s') !== false) { | |
| 629 | $user_email = self::get_input_value('_user', self::INPUT_POST); | |
| 59db17 | 630 | $user_email = rcube_utils::idn_convert($user_email, true); |
| 1aceb9 | 631 | $matches = preg_match('/(.*)@([a-z0-9\.\-\[\]\:]+)/i', $user_email, $s); |
| A | 632 | if ($matches < 1 || filter_var($s[1]."@".$s[2], FILTER_VALIDATE_EMAIL) === false) { |
| 633 | return false; | |
| 634 | } | |
| 635 | } | |
| 636 | ||
| d359dc | 637 | $name = str_replace(array('%n', '%t', '%d', '%h', '%z', '%s'), array($n, $t, $d, $h, $z, $s[2]), $name); |
| 1aceb9 | 638 | return $name; |
| A | 639 | } |
| 640 | ||
| 641 | ||
| 642 | /** | |
| 643 | * Returns remote IP address and forwarded addresses if found | |
| 644 | * | |
| 645 | * @return string Remote IP address(es) | |
| 646 | */ | |
| 647 | public static function remote_ip() | |
| 648 | { | |
| 649 | $address = $_SERVER['REMOTE_ADDR']; | |
| 650 | ||
| 651 | // append the NGINX X-Real-IP header, if set | |
| 652 | if (!empty($_SERVER['HTTP_X_REAL_IP'])) { | |
| 653 | $remote_ip[] = 'X-Real-IP: ' . $_SERVER['HTTP_X_REAL_IP']; | |
| 654 | } | |
| 655 | // append the X-Forwarded-For header, if set | |
| 656 | if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { | |
| 657 | $remote_ip[] = 'X-Forwarded-For: ' . $_SERVER['HTTP_X_FORWARDED_FOR']; | |
| 658 | } | |
| 659 | ||
| 660 | if (!empty($remote_ip)) { | |
| 661 | $address .= '(' . implode(',', $remote_ip) . ')'; | |
| 662 | } | |
| 663 | ||
| 664 | return $address; | |
| 665 | } | |
| 666 | ||
| 667 | ||
| 668 | /** | |
| 669 | * Read a specific HTTP request header. | |
| 670 | * | |
| 671 | * @param string $name Header name | |
| 672 | * | |
| 673 | * @return mixed Header value or null if not available | |
| 674 | */ | |
| 675 | public static function request_header($name) | |
| 676 | { | |
| 677 | if (function_exists('getallheaders')) { | |
| 678 | $hdrs = array_change_key_case(getallheaders(), CASE_UPPER); | |
| 679 | $key = strtoupper($name); | |
| 680 | } | |
| 681 | else { | |
| 682 | $key = 'HTTP_' . strtoupper(strtr($name, '-', '_')); | |
| 683 | $hdrs = array_change_key_case($_SERVER, CASE_UPPER); | |
| 684 | } | |
| 685 | ||
| 686 | return $hdrs[$key]; | |
| 687 | } | |
| 688 | ||
| 689 | /** | |
| 690 | * Explode quoted string | |
| 691 | * | |
| 692 | * @param string Delimiter expression string for preg_match() | |
| 693 | * @param string Input string | |
| 694 | * | |
| 695 | * @return array String items | |
| 696 | */ | |
| 697 | public static function explode_quoted_string($delimiter, $string) | |
| 698 | { | |
| 699 | $result = array(); | |
| 700 | $strlen = strlen($string); | |
| 701 | ||
| 702 | for ($q=$p=$i=0; $i < $strlen; $i++) { | |
| 703 | if ($string[$i] == "\"" && $string[$i-1] != "\\") { | |
| 704 | $q = $q ? false : true; | |
| 705 | } | |
| 706 | else if (!$q && preg_match("/$delimiter/", $string[$i])) { | |
| 707 | $result[] = substr($string, $p, $i - $p); | |
| 708 | $p = $i + 1; | |
| 709 | } | |
| 710 | } | |
| 711 | ||
| 712 | $result[] = substr($string, $p); | |
| 713 | ||
| 714 | return $result; | |
| 715 | } | |
| 716 | ||
| 717 | ||
| 718 | /** | |
| 719 | * Improved equivalent to strtotime() | |
| 720 | * | |
| 721 | * @param string $date Date string | |
| 722 | * | |
| 723 | * @return int Unix timestamp | |
| 724 | */ | |
| 725 | public static function strtotime($date) | |
| 726 | { | |
| 727 | // check for MS Outlook vCard date format YYYYMMDD | |
| 728 | if (preg_match('/^([12][90]\d\d)([01]\d)(\d\d)$/', trim($date), $matches)) { | |
| 729 | return mktime(0,0,0, intval($matches[2]), intval($matches[3]), intval($matches[1])); | |
| 730 | } | |
| 731 | else if (is_numeric($date)) { | |
| 732 | return $date; | |
| 733 | } | |
| 734 | ||
| 735 | // support non-standard "GMTXXXX" literal | |
| 736 | $date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date); | |
| 737 | ||
| 738 | // if date parsing fails, we have a date in non-rfc format. | |
| 739 | // remove token from the end and try again | |
| 740 | while ((($ts = @strtotime($date)) === false) || ($ts < 0)) { | |
| 741 | $d = explode(' ', $date); | |
| 742 | array_pop($d); | |
| 743 | if (!$d) { | |
| 744 | break; | |
| 745 | } | |
| 746 | $date = implode(' ', $d); | |
| 747 | } | |
| 748 | ||
| 749 | return $ts; | |
| 750 | } | |
| 751 | ||
| 752 | ||
| 753 | /* | |
| 754 | * Idn_to_ascii wrapper. | |
| 755 | * Intl/Idn modules version of this function doesn't work with e-mail address | |
| 756 | */ | |
| 757 | public static function idn_to_ascii($str) | |
| 758 | { | |
| 759 | return self::idn_convert($str, true); | |
| 760 | } | |
| 761 | ||
| 762 | ||
| 763 | /* | |
| 764 | * Idn_to_ascii wrapper. | |
| 765 | * Intl/Idn modules version of this function doesn't work with e-mail address | |
| 766 | */ | |
| 767 | public static function idn_to_utf8($str) | |
| 768 | { | |
| 769 | return self::idn_convert($str, false); | |
| 770 | } | |
| 771 | ||
| 772 | ||
| 773 | public static function idn_convert($input, $is_utf=false) | |
| 774 | { | |
| 775 | if ($at = strpos($input, '@')) { | |
| 776 | $user = substr($input, 0, $at); | |
| 777 | $domain = substr($input, $at+1); | |
| 778 | } | |
| 779 | else { | |
| 780 | $domain = $input; | |
| 781 | } | |
| 782 | ||
| 783 | $domain = $is_utf ? idn_to_ascii($domain) : idn_to_utf8($domain); | |
| 784 | ||
| 785 | if ($domain === false) { | |
| 786 | return ''; | |
| 787 | } | |
| 788 | ||
| 789 | return $at ? $user . '@' . $domain : $domain; | |
| 790 | } | |
| 791 | ||
| ceb5b5 | 792 | /** |
| TB | 793 | * Split the given string into word tokens |
| 794 | * | |
| 795 | * @param string Input to tokenize | |
| 796 | * @return array List of tokens | |
| 797 | */ | |
| 798 | public static function tokenize_string($str) | |
| 799 | { | |
| 800 | return explode(" ", preg_replace( | |
| 801 | array('/[\s;\/+-]+/i', '/(\d)[-.\s]+(\d)/', '/\s\w{1,3}\s/u'), | |
| 802 | array(' ', '\\1\\2', ' '), | |
| 803 | $str)); | |
| 804 | } | |
| 805 | ||
| 806 | /** | |
| 807 | * Normalize the given string for fulltext search. | |
| 808 | * Currently only optimized for Latin-1 characters; to be extended | |
| 809 | * | |
| 810 | * @param string Input string (UTF-8) | |
| 811 | * @param boolean True to return list of words as array | |
| 812 | * @return mixed Normalized string or a list of normalized tokens | |
| 813 | */ | |
| 814 | public static function normalize_string($str, $as_array = false) | |
| 815 | { | |
| 816 | // split by words | |
| 817 | $arr = self::tokenize_string($str); | |
| 818 | ||
| 819 | foreach ($arr as $i => $part) { | |
| 820 | if (utf8_encode(utf8_decode($part)) == $part) { // is latin-1 ? | |
| 821 | $arr[$i] = utf8_encode(strtr(strtolower(strtr(utf8_decode($part), | |
| 822 | 'ÇçäâàåéêëèïîìÅÉöôòüûùÿøØáíóúñÑÁÂÀãÃÊËÈÍÎÏÓÔõÕÚÛÙýÝ', | |
| 823 | 'ccaaaaeeeeiiiaeooouuuyooaiounnaaaaaeeeiiioooouuuyy')), | |
| 824 | array('ß' => 'ss', 'ae' => 'a', 'oe' => 'o', 'ue' => 'u'))); | |
| 825 | } | |
| 826 | else | |
| 827 | $arr[$i] = mb_strtolower($part); | |
| 828 | } | |
| 829 | ||
| 830 | return $as_array ? $arr : join(" ", $arr); | |
| 831 | } | |
| 832 | ||
| 1aceb9 | 833 | } |
