| 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 | * | |
| 9ab346 | 27 | * @package Framework |
| AM | 28 | * @subpackage Utils |
| 1aceb9 | 29 | */ |
| A | 30 | class rcube_utils |
| 31 | { | |
| 32 | // define constants for input reading | |
| 33 | const INPUT_GET = 0x0101; | |
| 34 | const INPUT_POST = 0x0102; | |
| 35 | const INPUT_GPC = 0x0103; | |
| 36 | ||
| 37 | /** | |
| 38 | * Helper method to set a cookie with the current path and host settings | |
| 39 | * | |
| 40 | * @param string Cookie name | |
| 41 | * @param string Cookie value | |
| 42 | * @param string Expiration time | |
| 43 | */ | |
| 44 | public static function setcookie($name, $value, $exp = 0) | |
| 45 | { | |
| 46 | if (headers_sent()) { | |
| 47 | return; | |
| 48 | } | |
| 49 | ||
| 50 | $cookie = session_get_cookie_params(); | |
| 09e5fc | 51 | $secure = $cookie['secure'] || self::https_check(); |
| 1aceb9 | 52 | |
| A | 53 | setcookie($name, $value, $exp, $cookie['path'], $cookie['domain'], $secure, true); |
| 54 | } | |
| 55 | ||
| 56 | /** | |
| 57 | * E-mail address validation. | |
| 58 | * | |
| 59 | * @param string $email Email address | |
| 60 | * @param boolean $dns_check True to check dns | |
| 61 | * | |
| 62 | * @return boolean True on success, False if address is invalid | |
| 63 | */ | |
| 64 | public static function check_email($email, $dns_check=true) | |
| 65 | { | |
| 66 | // Check for invalid characters | |
| 67 | if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $email)) { | |
| 68 | return false; | |
| 69 | } | |
| 70 | ||
| 71 | // Check for length limit specified by RFC 5321 (#1486453) | |
| 72 | if (strlen($email) > 254) { | |
| 73 | return false; | |
| 74 | } | |
| 75 | ||
| 76 | $email_array = explode('@', $email); | |
| 77 | ||
| 78 | // Check that there's one @ symbol | |
| 79 | if (count($email_array) < 2) { | |
| 80 | return false; | |
| 81 | } | |
| 82 | ||
| 83 | $domain_part = array_pop($email_array); | |
| 84 | $local_part = implode('@', $email_array); | |
| 85 | ||
| 86 | // from PEAR::Validate | |
| 87 | $regexp = '&^(?: | |
| 413df0 | 88 | ("\s*(?:[^"\f\n\r\t\v\b\s]+\s*)+")| #1 quoted name |
| AM | 89 | ([-\w!\#\$%\&\'*+~/^`|{}=]+(?:\.[-\w!\#\$%\&\'*+~/^`|{}=]+)*)) #2 OR dot-atom (RFC5322) |
| 90 | $&xi'; | |
| 1aceb9 | 91 | |
| A | 92 | if (!preg_match($regexp, $local_part)) { |
| 93 | return false; | |
| 94 | } | |
| 95 | ||
| da2812 | 96 | // Validate domain part |
| AM | 97 | if (preg_match('/^\[((IPv6:[0-9a-f:.]+)|([0-9.]+))\]$/i', $domain_part, $matches)) { |
| a65ce5 | 98 | return self::check_ip(preg_replace('/^IPv6:/i', '', $matches[1])); // valid IPv4 or IPv6 address |
| 1aceb9 | 99 | } |
| A | 100 | else { |
| 101 | // If not an IP address | |
| 102 | $domain_array = explode('.', $domain_part); | |
| 103 | // Not enough parts to be a valid domain | |
| 104 | if (sizeof($domain_array) < 2) { | |
| 105 | return false; | |
| 106 | } | |
| 107 | ||
| 108 | foreach ($domain_array as $part) { | |
| 109 | if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]))$/', $part)) { | |
| 110 | return false; | |
| 111 | } | |
| 112 | } | |
| 113 | ||
| c83b83 | 114 | // last domain part |
| AM | 115 | if (preg_match('/[^a-zA-Z]/', array_pop($domain_array))) { |
| 116 | return false; | |
| 1aceb9 | 117 | } |
| A | 118 | |
| 119 | $rcube = rcube::get_instance(); | |
| 120 | ||
| 121 | if (!$dns_check || !$rcube->config->get('email_dns_check')) { | |
| 122 | return true; | |
| 123 | } | |
| 124 | ||
| 125 | if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<')) { | |
| 126 | $lookup = array(); | |
| 127 | @exec("nslookup -type=MX " . escapeshellarg($domain_part) . " 2>&1", $lookup); | |
| 128 | foreach ($lookup as $line) { | |
| 129 | if (strpos($line, 'MX preference')) { | |
| 130 | return true; | |
| 131 | } | |
| 132 | } | |
| 133 | return false; | |
| 134 | } | |
| 135 | ||
| 136 | // find MX record(s) | |
| 137 | if (getmxrr($domain_part, $mx_records)) { | |
| 138 | return true; | |
| 139 | } | |
| 140 | ||
| 141 | // find any DNS record | |
| 142 | if (checkdnsrr($domain_part, 'ANY')) { | |
| 143 | return true; | |
| 144 | } | |
| 145 | } | |
| 146 | ||
| 147 | return false; | |
| 148 | } | |
| 149 | ||
| da2812 | 150 | |
| AM | 151 | /** |
| 152 | * Validates IPv4 or IPv6 address | |
| 153 | * | |
| 154 | * @param string $ip IP address in v4 or v6 format | |
| 155 | * | |
| 156 | * @return bool True if the address is valid | |
| 157 | */ | |
| a65ce5 | 158 | public static function check_ip($ip) |
| da2812 | 159 | { |
| AM | 160 | // IPv6, but there's no build-in IPv6 support |
| 161 | if (strpos($ip, ':') !== false && !defined('AF_INET6')) { | |
| 162 | $parts = explode(':', $domain_part); | |
| 163 | $count = count($parts); | |
| 164 | ||
| 165 | if ($count > 8 || $count < 2) { | |
| 166 | return false; | |
| 167 | } | |
| 168 | ||
| 169 | foreach ($parts as $idx => $part) { | |
| 170 | $length = strlen($part); | |
| 171 | if (!$length) { | |
| 172 | // there can be only one :: | |
| 173 | if ($found_empty) { | |
| 174 | return false; | |
| 175 | } | |
| 176 | $found_empty = true; | |
| 177 | } | |
| 178 | // last part can be an IPv4 address | |
| 179 | else if ($idx == $count - 1) { | |
| 180 | if (!preg_match('/^[0-9a-f]{1,4}$/i', $part)) { | |
| 181 | return @inet_pton($part) !== false; | |
| 182 | } | |
| 183 | } | |
| 184 | else if (!preg_match('/^[0-9a-f]{1,4}$/i', $part)) { | |
| 185 | return false; | |
| 186 | } | |
| 187 | } | |
| 188 | ||
| 189 | return true; | |
| 190 | } | |
| 191 | ||
| 192 | return @inet_pton($ip) !== false; | |
| 193 | } | |
| 194 | ||
| 195 | ||
| 1aceb9 | 196 | /** |
| A | 197 | * Check whether the HTTP referer matches the current request |
| 198 | * | |
| 199 | * @return boolean True if referer is the same host+path, false if not | |
| 200 | */ | |
| 201 | public static function check_referer() | |
| 202 | { | |
| 203 | $uri = parse_url($_SERVER['REQUEST_URI']); | |
| be71ab | 204 | $referer = parse_url(self::request_header('Referer')); |
| AM | 205 | return $referer['host'] == self::request_header('Host') && $referer['path'] == $uri['path']; |
| 1aceb9 | 206 | } |
| A | 207 | |
| 208 | ||
| 209 | /** | |
| 210 | * Replacing specials characters to a specific encoding type | |
| 211 | * | |
| 212 | * @param string Input string | |
| 213 | * @param string Encoding type: text|html|xml|js|url | |
| 214 | * @param string Replace mode for tags: show|replace|remove | |
| 215 | * @param boolean Convert newlines | |
| 216 | * | |
| 217 | * @return string The quoted string | |
| 218 | */ | |
| 219 | public static function rep_specialchars_output($str, $enctype = '', $mode = '', $newlines = true) | |
| 220 | { | |
| 221 | static $html_encode_arr = false; | |
| 222 | static $js_rep_table = false; | |
| 223 | static $xml_rep_table = false; | |
| 224 | ||
| fa4bf4 | 225 | if (!is_string($str)) { |
| AM | 226 | $str = strval($str); |
| 227 | } | |
| 228 | ||
| 1aceb9 | 229 | // encode for HTML output |
| A | 230 | if ($enctype == 'html') { |
| 231 | if (!$html_encode_arr) { | |
| 232 | $html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS); | |
| 233 | unset($html_encode_arr['?']); | |
| 234 | } | |
| 235 | ||
| 236 | $encode_arr = $html_encode_arr; | |
| 237 | ||
| 238 | // don't replace quotes and html tags | |
| 239 | if ($mode == 'show' || $mode == '') { | |
| 240 | $ltpos = strpos($str, '<'); | |
| 241 | if ($ltpos !== false && strpos($str, '>', $ltpos) !== false) { | |
| 242 | unset($encode_arr['"']); | |
| 243 | unset($encode_arr['<']); | |
| 244 | unset($encode_arr['>']); | |
| 245 | unset($encode_arr['&']); | |
| 246 | } | |
| 247 | } | |
| 248 | else if ($mode == 'remove') { | |
| 249 | $str = strip_tags($str); | |
| 250 | } | |
| 251 | ||
| 252 | $out = strtr($str, $encode_arr); | |
| 253 | ||
| 254 | return $newlines ? nl2br($out) : $out; | |
| 255 | } | |
| 256 | ||
| 257 | // if the replace tables for XML and JS are not yet defined | |
| 258 | if ($js_rep_table === false) { | |
| 259 | $js_rep_table = $xml_rep_table = array(); | |
| 260 | $xml_rep_table['&'] = '&'; | |
| 261 | ||
| 262 | // can be increased to support more charsets | |
| 263 | for ($c=160; $c<256; $c++) { | |
| 264 | $xml_rep_table[chr($c)] = "&#$c;"; | |
| 265 | } | |
| 266 | ||
| 267 | $xml_rep_table['"'] = '"'; | |
| 268 | $js_rep_table['"'] = '\\"'; | |
| 269 | $js_rep_table["'"] = "\\'"; | |
| 270 | $js_rep_table["\\"] = "\\\\"; | |
| 271 | // Unicode line and paragraph separators (#1486310) | |
| 272 | $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = '
'; | |
| 273 | $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = '
'; | |
| 274 | } | |
| 275 | ||
| 276 | // encode for javascript use | |
| 277 | if ($enctype == 'js') { | |
| 278 | return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table)); | |
| 279 | } | |
| 280 | ||
| 281 | // encode for plaintext | |
| 282 | if ($enctype == 'text') { | |
| 283 | return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str); | |
| 284 | } | |
| 285 | ||
| 286 | if ($enctype == 'url') { | |
| 287 | return rawurlencode($str); | |
| 288 | } | |
| 289 | ||
| 290 | // encode for XML | |
| 291 | if ($enctype == 'xml') { | |
| 292 | return strtr($str, $xml_rep_table); | |
| 293 | } | |
| 294 | ||
| 295 | // no encoding given -> return original string | |
| 296 | return $str; | |
| 297 | } | |
| 298 | ||
| 299 | ||
| 300 | /** | |
| 301 | * Read input value and convert it for internal use | |
| 302 | * Performs stripslashes() and charset conversion if necessary | |
| 303 | * | |
| 304 | * @param string Field name to read | |
| 305 | * @param int Source to get value from (GPC) | |
| 306 | * @param boolean Allow HTML tags in field value | |
| 307 | * @param string Charset to convert into | |
| 308 | * | |
| 309 | * @return string Field value or NULL if not available | |
| 310 | */ | |
| 311 | public static function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL) | |
| 312 | { | |
| 313 | $value = NULL; | |
| 314 | ||
| 315 | if ($source == self::INPUT_GET) { | |
| 316 | if (isset($_GET[$fname])) { | |
| 317 | $value = $_GET[$fname]; | |
| 318 | } | |
| 319 | } | |
| 320 | else if ($source == self::INPUT_POST) { | |
| 321 | if (isset($_POST[$fname])) { | |
| 322 | $value = $_POST[$fname]; | |
| 323 | } | |
| 324 | } | |
| 325 | else if ($source == self::INPUT_GPC) { | |
| 326 | if (isset($_POST[$fname])) { | |
| 327 | $value = $_POST[$fname]; | |
| 328 | } | |
| 329 | else if (isset($_GET[$fname])) { | |
| 330 | $value = $_GET[$fname]; | |
| 331 | } | |
| 332 | else if (isset($_COOKIE[$fname])) { | |
| 333 | $value = $_COOKIE[$fname]; | |
| 334 | } | |
| 335 | } | |
| 336 | ||
| 337 | return self::parse_input_value($value, $allow_html, $charset); | |
| 338 | } | |
| 339 | ||
| 340 | ||
| 341 | /** | |
| 342 | * Parse/validate input value. See self::get_input_value() | |
| 343 | * Performs stripslashes() and charset conversion if necessary | |
| 344 | * | |
| 345 | * @param string Input value | |
| 346 | * @param boolean Allow HTML tags in field value | |
| 347 | * @param string Charset to convert into | |
| 348 | * | |
| 349 | * @return string Parsed value | |
| 350 | */ | |
| 351 | public static function parse_input_value($value, $allow_html=FALSE, $charset=NULL) | |
| 352 | { | |
| 353 | global $OUTPUT; | |
| 354 | ||
| 355 | if (empty($value)) { | |
| 356 | return $value; | |
| 357 | } | |
| 358 | ||
| 359 | if (is_array($value)) { | |
| 360 | foreach ($value as $idx => $val) { | |
| 361 | $value[$idx] = self::parse_input_value($val, $allow_html, $charset); | |
| 362 | } | |
| 363 | return $value; | |
| 364 | } | |
| 365 | ||
| 366 | // strip single quotes if magic_quotes_sybase is enabled | |
| 367 | if (ini_get('magic_quotes_sybase')) { | |
| 368 | $value = str_replace("''", "'", $value); | |
| 369 | } | |
| 370 | // strip slashes if magic_quotes enabled | |
| 371 | else if (get_magic_quotes_gpc() || get_magic_quotes_runtime()) { | |
| 372 | $value = stripslashes($value); | |
| 373 | } | |
| 374 | ||
| 375 | // remove HTML tags if not allowed | |
| 376 | if (!$allow_html) { | |
| 377 | $value = strip_tags($value); | |
| 378 | } | |
| 379 | ||
| 380 | $output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null; | |
| 381 | ||
| 382 | // remove invalid characters (#1488124) | |
| 383 | if ($output_charset == 'UTF-8') { | |
| 384 | $value = rcube_charset::clean($value); | |
| 385 | } | |
| 386 | ||
| 387 | // convert to internal charset | |
| 388 | if ($charset && $output_charset) { | |
| 389 | $value = rcube_charset::convert($value, $output_charset, $charset); | |
| 390 | } | |
| 391 | ||
| 392 | return $value; | |
| 393 | } | |
| 394 | ||
| 395 | ||
| 396 | /** | |
| 397 | * Convert array of request parameters (prefixed with _) | |
| 398 | * to a regular array with non-prefixed keys. | |
| 399 | * | |
| 400 | * @param int $mode Source to get value from (GPC) | |
| 401 | * @param string $ignore PCRE expression to skip parameters by name | |
| 402 | * | |
| 403 | * @return array Hash array with all request parameters | |
| 404 | */ | |
| 405 | public static function request2param($mode = null, $ignore = 'task|action') | |
| 406 | { | |
| 407 | $out = array(); | |
| 408 | $src = $mode == self::INPUT_GET ? $_GET : ($mode == self::INPUT_POST ? $_POST : $_REQUEST); | |
| 409 | ||
| 410 | foreach ($src as $key => $value) { | |
| 411 | $fname = $key[0] == '_' ? substr($key, 1) : $key; | |
| 412 | if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname)) { | |
| 413 | $out[$fname] = self::get_input_value($key, $mode); | |
| 414 | } | |
| 415 | } | |
| 416 | ||
| 417 | return $out; | |
| 418 | } | |
| 419 | ||
| 420 | ||
| 421 | /** | |
| 422 | * Convert the given string into a valid HTML identifier | |
| 423 | * Same functionality as done in app.js with rcube_webmail.html_identifier() | |
| 424 | */ | |
| 425 | public static function html_identifier($str, $encode=false) | |
| 426 | { | |
| 427 | if ($encode) { | |
| 428 | return rtrim(strtr(base64_encode($str), '+/', '-_'), '='); | |
| 429 | } | |
| 430 | else { | |
| 431 | return asciiwords($str, true, '_'); | |
| 432 | } | |
| 433 | } | |
| 434 | ||
| 435 | ||
| 436 | /** | |
| 437 | * Create an edit field for inclusion on a form | |
| 438 | * | |
| 439 | * @param string col field name | |
| 440 | * @param string value field value | |
| 441 | * @param array attrib HTML element attributes for field | |
| 442 | * @param string type HTML element type (default 'text') | |
| 443 | * | |
| 444 | * @return string HTML field definition | |
| 445 | */ | |
| 446 | public static function get_edit_field($col, $value, $attrib, $type = 'text') | |
| 447 | { | |
| 448 | static $colcounts = array(); | |
| 449 | ||
| 450 | $fname = '_'.$col; | |
| 451 | $attrib['name'] = $fname . ($attrib['array'] ? '[]' : ''); | |
| 452 | $attrib['class'] = trim($attrib['class'] . ' ff_' . $col); | |
| 453 | ||
| 454 | if ($type == 'checkbox') { | |
| 455 | $attrib['value'] = '1'; | |
| 456 | $input = new html_checkbox($attrib); | |
| 457 | } | |
| 458 | else if ($type == 'textarea') { | |
| 459 | $attrib['cols'] = $attrib['size']; | |
| 460 | $input = new html_textarea($attrib); | |
| 461 | } | |
| 462 | else if ($type == 'select') { | |
| 463 | $input = new html_select($attrib); | |
| 464 | $input->add('---', ''); | |
| 465 | $input->add(array_values($attrib['options']), array_keys($attrib['options'])); | |
| 466 | } | |
| 467 | else if ($attrib['type'] == 'password') { | |
| 468 | $input = new html_passwordfield($attrib); | |
| 469 | } | |
| 470 | else { | |
| 471 | if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden') { | |
| 472 | $attrib['type'] = 'text'; | |
| 473 | } | |
| 474 | $input = new html_inputfield($attrib); | |
| 475 | } | |
| 476 | ||
| 477 | // use value from post | |
| 478 | if (isset($_POST[$fname])) { | |
| 479 | $postvalue = self::get_input_value($fname, self::INPUT_POST, true); | |
| 480 | $value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue; | |
| 481 | } | |
| 482 | ||
| 483 | $out = $input->show($value); | |
| 484 | ||
| 485 | return $out; | |
| 486 | } | |
| 487 | ||
| 488 | ||
| 489 | /** | |
| 490 | * Replace all css definitions with #container [def] | |
| 491 | * and remove css-inlined scripting | |
| 492 | * | |
| 493 | * @param string CSS source code | |
| 494 | * @param string Container ID to use as prefix | |
| 495 | * | |
| 496 | * @return string Modified CSS source | |
| 497 | */ | |
| 498 | public static function mod_css_styles($source, $container_id, $allow_remote=false) | |
| 499 | { | |
| 500 | $last_pos = 0; | |
| 501 | $replacements = new rcube_string_replacer; | |
| 502 | ||
| 503 | // ignore the whole block if evil styles are detected | |
| 504 | $source = self::xss_entity_decode($source); | |
| 505 | $stripped = preg_replace('/[^a-z\(:;]/i', '', $source); | |
| 506 | $evilexpr = 'expression|behavior|javascript:|import[^a]' . (!$allow_remote ? '|url\(' : ''); | |
| 507 | if (preg_match("/$evilexpr/i", $stripped)) { | |
| 508 | return '/* evil! */'; | |
| 509 | } | |
| 510 | ||
| 511 | // cut out all contents between { and } | |
| 512 | while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) { | |
| 513 | $styles = substr($source, $pos+1, $pos2-($pos+1)); | |
| 514 | ||
| 515 | // check every line of a style block... | |
| 516 | if ($allow_remote) { | |
| 517 | $a_styles = preg_split('/;[\r\n]*/', $styles, -1, PREG_SPLIT_NO_EMPTY); | |
| 518 | foreach ($a_styles as $line) { | |
| 519 | $stripped = preg_replace('/[^a-z\(:;]/i', '', $line); | |
| 520 | // ... and only allow strict url() values | |
| 521 | $regexp = '!url\s*\([ "\'](https?:)//[a-z0-9/._+-]+["\' ]\)!Uims'; | |
| 522 | if (stripos($stripped, 'url(') && !preg_match($regexp, $line)) { | |
| 523 | $a_styles = array('/* evil! */'); | |
| 524 | break; | |
| 525 | } | |
| 526 | } | |
| 527 | $styles = join(";\n", $a_styles); | |
| 528 | } | |
| 529 | ||
| 530 | $key = $replacements->add($styles); | |
| 531 | $source = substr($source, 0, $pos+1) | |
| 532 | . $replacements->get_replacement($key) | |
| 533 | . substr($source, $pos2, strlen($source)-$pos2); | |
| 534 | $last_pos = $pos+2; | |
| 535 | } | |
| 536 | ||
| 537 | // remove html comments and add #container to each tag selector. | |
| 538 | // also replace body definition because we also stripped off the <body> tag | |
| 539 | $styles = preg_replace( | |
| 540 | array( | |
| 541 | '/(^\s*<!--)|(-->\s*$)/', | |
| 542 | '/(^\s*|,\s*|\}\s*)([a-z0-9\._#\*][a-z0-9\.\-_]*)/im', | |
| 543 | '/'.preg_quote($container_id, '/').'\s+body/i', | |
| 544 | ), | |
| 545 | array( | |
| 546 | '', | |
| 547 | "\\1#$container_id \\2", | |
| 548 | $container_id, | |
| 549 | ), | |
| 550 | $source); | |
| 551 | ||
| 552 | // put block contents back in | |
| 553 | $styles = $replacements->resolve($styles); | |
| 554 | ||
| 555 | return $styles; | |
| 556 | } | |
| 557 | ||
| 558 | ||
| 559 | /** | |
| 560 | * Generate CSS classes from mimetype and filename extension | |
| 561 | * | |
| 562 | * @param string $mimetype Mimetype | |
| 563 | * @param string $filename Filename | |
| 564 | * | |
| 565 | * @return string CSS classes separated by space | |
| 566 | */ | |
| 567 | public static function file2class($mimetype, $filename) | |
| 568 | { | |
| 569 | list($primary, $secondary) = explode('/', $mimetype); | |
| 570 | ||
| 571 | $classes = array($primary ? $primary : 'unknown'); | |
| 572 | if ($secondary) { | |
| 573 | $classes[] = $secondary; | |
| 574 | } | |
| 575 | if (preg_match('/\.([a-z0-9]+)$/i', $filename, $m)) { | |
| 576 | $classes[] = $m[1]; | |
| 577 | } | |
| 578 | ||
| 579 | return strtolower(join(" ", $classes)); | |
| 580 | } | |
| 581 | ||
| 582 | ||
| 583 | /** | |
| 584 | * Decode escaped entities used by known XSS exploits. | |
| 585 | * See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples | |
| 586 | * | |
| 587 | * @param string CSS content to decode | |
| 588 | * | |
| 589 | * @return string Decoded string | |
| 590 | */ | |
| 591 | public static function xss_entity_decode($content) | |
| 592 | { | |
| 593 | $out = html_entity_decode(html_entity_decode($content)); | |
| 594 | $out = preg_replace_callback('/\\\([0-9a-f]{4})/i', | |
| 595 | array(self, 'xss_entity_decode_callback'), $out); | |
| 596 | $out = preg_replace('#/\*.*\*/#Ums', '', $out); | |
| 597 | ||
| 598 | return $out; | |
| 599 | } | |
| 600 | ||
| 601 | ||
| 602 | /** | |
| 603 | * preg_replace_callback callback for xss_entity_decode | |
| 604 | * | |
| 605 | * @param array $matches Result from preg_replace_callback | |
| 606 | * | |
| 607 | * @return string Decoded entity | |
| 608 | */ | |
| 609 | public static function xss_entity_decode_callback($matches) | |
| 610 | { | |
| 611 | return chr(hexdec($matches[1])); | |
| 612 | } | |
| 613 | ||
| 614 | ||
| 615 | /** | |
| 616 | * Check if we can process not exceeding memory_limit | |
| 617 | * | |
| 618 | * @param integer Required amount of memory | |
| 619 | * | |
| 620 | * @return boolean True if memory won't be exceeded, False otherwise | |
| 621 | */ | |
| 622 | public static function mem_check($need) | |
| 623 | { | |
| 624 | $mem_limit = parse_bytes(ini_get('memory_limit')); | |
| 625 | $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB | |
| 626 | ||
| 627 | return $mem_limit > 0 && $memory + $need > $mem_limit ? false : true; | |
| 628 | } | |
| 629 | ||
| 630 | ||
| 631 | /** | |
| 632 | * Check if working in SSL mode | |
| 633 | * | |
| 634 | * @param integer $port HTTPS port number | |
| 635 | * @param boolean $use_https Enables 'use_https' option checking | |
| 636 | * | |
| 637 | * @return boolean | |
| 638 | */ | |
| 639 | public static function https_check($port=null, $use_https=true) | |
| 640 | { | |
| 641 | global $RCMAIL; | |
| 642 | ||
| 643 | if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') { | |
| 644 | return true; | |
| 645 | } | |
| 646 | if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https') { | |
| 647 | return true; | |
| 648 | } | |
| 649 | if ($port && $_SERVER['SERVER_PORT'] == $port) { | |
| 650 | return true; | |
| 651 | } | |
| 652 | if ($use_https && isset($RCMAIL) && $RCMAIL->config->get('use_https')) { | |
| 653 | return true; | |
| 654 | } | |
| 655 | ||
| 656 | return false; | |
| 657 | } | |
| 658 | ||
| 659 | ||
| 660 | /** | |
| 661 | * Replaces hostname variables. | |
| 662 | * | |
| 663 | * @param string $name Hostname | |
| 664 | * @param string $host Optional IMAP hostname | |
| 665 | * | |
| 666 | * @return string Hostname | |
| 667 | */ | |
| 668 | public static function parse_host($name, $host = '') | |
| 669 | { | |
| 670 | // %n - host | |
| 671 | $n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']); | |
| d359dc | 672 | // %t - host name without first part, e.g. %n=mail.domain.tld, %t=domain.tld |
| a13035 | 673 | $t = preg_replace('/^[^\.]+\./', '', $n); |
| TB | 674 | // %d - domain name without first part |
| d359dc | 675 | $d = preg_replace('/^[^\.]+\./', '', $_SERVER['HTTP_HOST']); |
| 1aceb9 | 676 | // %h - IMAP host |
| A | 677 | $h = $_SESSION['storage_host'] ? $_SESSION['storage_host'] : $host; |
| 678 | // %z - IMAP domain without first part, e.g. %h=imap.domain.tld, %z=domain.tld | |
| 679 | $z = preg_replace('/^[^\.]+\./', '', $h); | |
| 680 | // %s - domain name after the '@' from e-mail address provided at login screen. Returns FALSE if an invalid email is provided | |
| 681 | if (strpos($name, '%s') !== false) { | |
| 682 | $user_email = self::get_input_value('_user', self::INPUT_POST); | |
| a13035 | 683 | $user_email = self::idn_convert($user_email, true); |
| 1aceb9 | 684 | $matches = preg_match('/(.*)@([a-z0-9\.\-\[\]\:]+)/i', $user_email, $s); |
| A | 685 | if ($matches < 1 || filter_var($s[1]."@".$s[2], FILTER_VALIDATE_EMAIL) === false) { |
| 686 | return false; | |
| 687 | } | |
| 688 | } | |
| 689 | ||
| d359dc | 690 | $name = str_replace(array('%n', '%t', '%d', '%h', '%z', '%s'), array($n, $t, $d, $h, $z, $s[2]), $name); |
| 1aceb9 | 691 | return $name; |
| A | 692 | } |
| 693 | ||
| 694 | ||
| 695 | /** | |
| 696 | * Returns remote IP address and forwarded addresses if found | |
| 697 | * | |
| 698 | * @return string Remote IP address(es) | |
| 699 | */ | |
| 700 | public static function remote_ip() | |
| 701 | { | |
| 702 | $address = $_SERVER['REMOTE_ADDR']; | |
| 703 | ||
| 704 | // append the NGINX X-Real-IP header, if set | |
| 705 | if (!empty($_SERVER['HTTP_X_REAL_IP'])) { | |
| 706 | $remote_ip[] = 'X-Real-IP: ' . $_SERVER['HTTP_X_REAL_IP']; | |
| 707 | } | |
| 708 | // append the X-Forwarded-For header, if set | |
| 709 | if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { | |
| 710 | $remote_ip[] = 'X-Forwarded-For: ' . $_SERVER['HTTP_X_FORWARDED_FOR']; | |
| 711 | } | |
| 712 | ||
| 713 | if (!empty($remote_ip)) { | |
| 714 | $address .= '(' . implode(',', $remote_ip) . ')'; | |
| 715 | } | |
| 716 | ||
| 717 | return $address; | |
| 718 | } | |
| 719 | ||
| 720 | ||
| 721 | /** | |
| 722 | * Read a specific HTTP request header. | |
| 723 | * | |
| 724 | * @param string $name Header name | |
| 725 | * | |
| 726 | * @return mixed Header value or null if not available | |
| 727 | */ | |
| 728 | public static function request_header($name) | |
| 729 | { | |
| 730 | if (function_exists('getallheaders')) { | |
| 731 | $hdrs = array_change_key_case(getallheaders(), CASE_UPPER); | |
| 732 | $key = strtoupper($name); | |
| 733 | } | |
| 734 | else { | |
| 735 | $key = 'HTTP_' . strtoupper(strtr($name, '-', '_')); | |
| 736 | $hdrs = array_change_key_case($_SERVER, CASE_UPPER); | |
| 737 | } | |
| 738 | ||
| 739 | return $hdrs[$key]; | |
| 740 | } | |
| 741 | ||
| 742 | /** | |
| 743 | * Explode quoted string | |
| 744 | * | |
| 745 | * @param string Delimiter expression string for preg_match() | |
| 746 | * @param string Input string | |
| 747 | * | |
| 748 | * @return array String items | |
| 749 | */ | |
| 750 | public static function explode_quoted_string($delimiter, $string) | |
| 751 | { | |
| 752 | $result = array(); | |
| 753 | $strlen = strlen($string); | |
| 754 | ||
| 755 | for ($q=$p=$i=0; $i < $strlen; $i++) { | |
| 756 | if ($string[$i] == "\"" && $string[$i-1] != "\\") { | |
| 757 | $q = $q ? false : true; | |
| 758 | } | |
| 759 | else if (!$q && preg_match("/$delimiter/", $string[$i])) { | |
| 760 | $result[] = substr($string, $p, $i - $p); | |
| 761 | $p = $i + 1; | |
| 762 | } | |
| 763 | } | |
| 764 | ||
| 3a54cc | 765 | $result[] = (string) substr($string, $p); |
| 1aceb9 | 766 | |
| A | 767 | return $result; |
| 768 | } | |
| 769 | ||
| 770 | ||
| 771 | /** | |
| 772 | * Improved equivalent to strtotime() | |
| 773 | * | |
| 774 | * @param string $date Date string | |
| 775 | * | |
| 776 | * @return int Unix timestamp | |
| 777 | */ | |
| 778 | public static function strtotime($date) | |
| 779 | { | |
| 780 | // check for MS Outlook vCard date format YYYYMMDD | |
| 781 | if (preg_match('/^([12][90]\d\d)([01]\d)(\d\d)$/', trim($date), $matches)) { | |
| 782 | return mktime(0,0,0, intval($matches[2]), intval($matches[3]), intval($matches[1])); | |
| 783 | } | |
| 784 | else if (is_numeric($date)) { | |
| 785 | return $date; | |
| 786 | } | |
| 787 | ||
| 788 | // support non-standard "GMTXXXX" literal | |
| 789 | $date = preg_replace('/GMT\s*([+-][0-9]+)/', '\\1', $date); | |
| 790 | ||
| 791 | // if date parsing fails, we have a date in non-rfc format. | |
| 792 | // remove token from the end and try again | |
| 793 | while ((($ts = @strtotime($date)) === false) || ($ts < 0)) { | |
| 794 | $d = explode(' ', $date); | |
| 795 | array_pop($d); | |
| 796 | if (!$d) { | |
| 797 | break; | |
| 798 | } | |
| 799 | $date = implode(' ', $d); | |
| 800 | } | |
| 801 | ||
| 802 | return $ts; | |
| 803 | } | |
| 804 | ||
| 805 | ||
| 806 | /* | |
| 807 | * Idn_to_ascii wrapper. | |
| 808 | * Intl/Idn modules version of this function doesn't work with e-mail address | |
| 809 | */ | |
| 810 | public static function idn_to_ascii($str) | |
| 811 | { | |
| 812 | return self::idn_convert($str, true); | |
| 813 | } | |
| 814 | ||
| 815 | ||
| 816 | /* | |
| 817 | * Idn_to_ascii wrapper. | |
| 818 | * Intl/Idn modules version of this function doesn't work with e-mail address | |
| 819 | */ | |
| 820 | public static function idn_to_utf8($str) | |
| 821 | { | |
| 822 | return self::idn_convert($str, false); | |
| 823 | } | |
| 824 | ||
| 825 | ||
| 826 | public static function idn_convert($input, $is_utf=false) | |
| 827 | { | |
| 828 | if ($at = strpos($input, '@')) { | |
| 829 | $user = substr($input, 0, $at); | |
| 830 | $domain = substr($input, $at+1); | |
| 831 | } | |
| 832 | else { | |
| 833 | $domain = $input; | |
| 834 | } | |
| 835 | ||
| 836 | $domain = $is_utf ? idn_to_ascii($domain) : idn_to_utf8($domain); | |
| 837 | ||
| 838 | if ($domain === false) { | |
| 839 | return ''; | |
| 840 | } | |
| 841 | ||
| 842 | return $at ? $user . '@' . $domain : $domain; | |
| 843 | } | |
| 844 | ||
| ceb5b5 | 845 | /** |
| TB | 846 | * Split the given string into word tokens |
| 847 | * | |
| 848 | * @param string Input to tokenize | |
| 849 | * @return array List of tokens | |
| 850 | */ | |
| 851 | public static function tokenize_string($str) | |
| 852 | { | |
| 853 | return explode(" ", preg_replace( | |
| 854 | array('/[\s;\/+-]+/i', '/(\d)[-.\s]+(\d)/', '/\s\w{1,3}\s/u'), | |
| 855 | array(' ', '\\1\\2', ' '), | |
| 856 | $str)); | |
| 857 | } | |
| 858 | ||
| 859 | /** | |
| 860 | * Normalize the given string for fulltext search. | |
| 861 | * Currently only optimized for Latin-1 characters; to be extended | |
| 862 | * | |
| 863 | * @param string Input string (UTF-8) | |
| 864 | * @param boolean True to return list of words as array | |
| 865 | * @return mixed Normalized string or a list of normalized tokens | |
| 866 | */ | |
| 867 | public static function normalize_string($str, $as_array = false) | |
| 868 | { | |
| 869 | // split by words | |
| 870 | $arr = self::tokenize_string($str); | |
| 871 | ||
| 872 | foreach ($arr as $i => $part) { | |
| 873 | if (utf8_encode(utf8_decode($part)) == $part) { // is latin-1 ? | |
| 874 | $arr[$i] = utf8_encode(strtr(strtolower(strtr(utf8_decode($part), | |
| 875 | 'ÇçäâàåéêëèïîìÅÉöôòüûùÿøØáíóúñÑÁÂÀãÃÊËÈÍÎÏÓÔõÕÚÛÙýÝ', | |
| 876 | 'ccaaaaeeeeiiiaeooouuuyooaiounnaaaaaeeeiiioooouuuyy')), | |
| 877 | array('ß' => 'ss', 'ae' => 'a', 'oe' => 'o', 'ue' => 'u'))); | |
| 878 | } | |
| 879 | else | |
| 880 | $arr[$i] = mb_strtolower($part); | |
| 881 | } | |
| 882 | ||
| 883 | return $as_array ? $arr : join(" ", $arr); | |
| 884 | } | |
| 885 | ||
| 1aceb9 | 886 | } |
