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comparison program/lib/Roundcube/rcube_utils.php @ 0:4681f974d28b

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vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:52:31 -0500
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-1:000000000000 0:4681f974d28b
1 <?php
2
3 /**
4 +-----------------------------------------------------------------------+
5 | This file is part of the Roundcube Webmail client |
6 | Copyright (C) 2008-2012, The Roundcube Dev Team |
7 | Copyright (C) 2011-2012, Kolab Systems AG |
8 | |
9 | Licensed under the GNU General Public License version 3 or |
10 | any later version with exceptions for skins & plugins. |
11 | See the README file for a full license statement. |
12 | |
13 | PURPOSE: |
14 | Utility class providing common functions |
15 +-----------------------------------------------------------------------+
16 | Author: Thomas Bruederli <roundcube@gmail.com> |
17 | Author: Aleksander Machniak <alec@alec.pl> |
18 +-----------------------------------------------------------------------+
19 */
20
21 /**
22 * Utility class providing common functions
23 *
24 * @package Framework
25 * @subpackage Utils
26 */
27 class rcube_utils
28 {
29 // define constants for input reading
30 const INPUT_GET = 1;
31 const INPUT_POST = 2;
32 const INPUT_COOKIE = 4;
33 const INPUT_GP = 3; // GET + POST
34 const INPUT_GPC = 7; // GET + POST + COOKIE
35
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();
51 $secure = $cookie['secure'] || self::https_check();
52
53 setcookie($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 = '&^(?:
88 ("\s*(?:[^"\f\n\r\t\v\b\s]+\s*)+")| #1 quoted name
89 ([-\w!\#\$%\&\'*+~/^`|{}=]+(?:\.[-\w!\#\$%\&\'*+~/^`|{}=]+)*)) #2 OR dot-atom (RFC5322)
90 $&xi';
91
92 if (!preg_match($regexp, $local_part)) {
93 return false;
94 }
95
96 // Validate domain part
97 if (preg_match('/^\[((IPv6:[0-9a-f:.]+)|([0-9.]+))\]$/i', $domain_part, $matches)) {
98 return self::check_ip(preg_replace('/^IPv6:/i', '', $matches[1])); // valid IPv4 or IPv6 address
99 }
100 else {
101 // If not an IP address
102 $domain_array = explode('.', $domain_part);
103 // Not enough parts to be a valid domain
104 if (count($domain_array) < 2) {
105 return false;
106 }
107
108 foreach ($domain_array as $part) {
109 if (!preg_match('/^((xn--)?([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]))$/', $part)) {
110 return false;
111 }
112 }
113
114 // last domain part
115 $last_part = array_pop($domain_array);
116 if (strpos($last_part, 'xn--') !== 0 && preg_match('/[^a-zA-Z]/', $last_part)) {
117 return false;
118 }
119
120 $rcube = rcube::get_instance();
121
122 if (!$dns_check || !$rcube->config->get('email_dns_check')) {
123 return true;
124 }
125
126 // find MX record(s)
127 if (!function_exists('getmxrr') || getmxrr($domain_part, $mx_records)) {
128 return true;
129 }
130
131 // find any DNS record
132 if (!function_exists('checkdnsrr') || checkdnsrr($domain_part, 'ANY')) {
133 return true;
134 }
135 }
136
137 return false;
138 }
139
140 /**
141 * Validates IPv4 or IPv6 address
142 *
143 * @param string $ip IP address in v4 or v6 format
144 *
145 * @return bool True if the address is valid
146 */
147 public static function check_ip($ip)
148 {
149 return filter_var($ip, FILTER_VALIDATE_IP) !== false;
150 }
151
152 /**
153 * Check whether the HTTP referer matches the current request
154 *
155 * @return boolean True if referer is the same host+path, false if not
156 */
157 public static function check_referer()
158 {
159 $uri = parse_url($_SERVER['REQUEST_URI']);
160 $referer = parse_url(self::request_header('Referer'));
161
162 return $referer['host'] == self::request_header('Host') && $referer['path'] == $uri['path'];
163 }
164
165 /**
166 * Replacing specials characters to a specific encoding type
167 *
168 * @param string Input string
169 * @param string Encoding type: text|html|xml|js|url
170 * @param string Replace mode for tags: show|remove|strict
171 * @param boolean Convert newlines
172 *
173 * @return string The quoted string
174 */
175 public static function rep_specialchars_output($str, $enctype = '', $mode = '', $newlines = true)
176 {
177 static $html_encode_arr = false;
178 static $js_rep_table = false;
179 static $xml_rep_table = false;
180
181 if (!is_string($str)) {
182 $str = strval($str);
183 }
184
185 // encode for HTML output
186 if ($enctype == 'html') {
187 if (!$html_encode_arr) {
188 $html_encode_arr = get_html_translation_table(HTML_SPECIALCHARS);
189 unset($html_encode_arr['?']);
190 }
191
192 $encode_arr = $html_encode_arr;
193
194 if ($mode == 'remove') {
195 $str = strip_tags($str);
196 }
197 else if ($mode != 'strict') {
198 // don't replace quotes and html tags
199 $ltpos = strpos($str, '<');
200 if ($ltpos !== false && strpos($str, '>', $ltpos) !== false) {
201 unset($encode_arr['"']);
202 unset($encode_arr['<']);
203 unset($encode_arr['>']);
204 unset($encode_arr['&']);
205 }
206 }
207
208 $out = strtr($str, $encode_arr);
209
210 return $newlines ? nl2br($out) : $out;
211 }
212
213 // if the replace tables for XML and JS are not yet defined
214 if ($js_rep_table === false) {
215 $js_rep_table = $xml_rep_table = array();
216 $xml_rep_table['&'] = '&amp;';
217
218 // can be increased to support more charsets
219 for ($c=160; $c<256; $c++) {
220 $xml_rep_table[chr($c)] = "&#$c;";
221 }
222
223 $xml_rep_table['"'] = '&quot;';
224 $js_rep_table['"'] = '\\"';
225 $js_rep_table["'"] = "\\'";
226 $js_rep_table["\\"] = "\\\\";
227 // Unicode line and paragraph separators (#1486310)
228 $js_rep_table[chr(hexdec('E2')).chr(hexdec('80')).chr(hexdec('A8'))] = '&#8232;';
229 $js_rep_table[chr(hexdec('E2')).chr(hexdec('80')).chr(hexdec('A9'))] = '&#8233;';
230 }
231
232 // encode for javascript use
233 if ($enctype == 'js') {
234 return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));
235 }
236
237 // encode for plaintext
238 if ($enctype == 'text') {
239 return str_replace("\r\n", "\n", $mode == 'remove' ? strip_tags($str) : $str);
240 }
241
242 if ($enctype == 'url') {
243 return rawurlencode($str);
244 }
245
246 // encode for XML
247 if ($enctype == 'xml') {
248 return strtr($str, $xml_rep_table);
249 }
250
251 // no encoding given -> return original string
252 return $str;
253 }
254
255 /**
256 * Read input value and convert it for internal use
257 * Performs stripslashes() and charset conversion if necessary
258 *
259 * @param string Field name to read
260 * @param int Source to get value from (see self::INPUT_*)
261 * @param boolean Allow HTML tags in field value
262 * @param string Charset to convert into
263 *
264 * @return string Field value or NULL if not available
265 */
266 public static function get_input_value($fname, $source, $allow_html = false, $charset = null)
267 {
268 $value = null;
269
270 if (($source & self::INPUT_GET) && isset($_GET[$fname])) {
271 $value = $_GET[$fname];
272 }
273
274 if (($source & self::INPUT_POST) && isset($_POST[$fname])) {
275 $value = $_POST[$fname];
276 }
277
278 if (($source & self::INPUT_COOKIE) && isset($_COOKIE[$fname])) {
279 $value = $_COOKIE[$fname];
280 }
281
282 return self::parse_input_value($value, $allow_html, $charset);
283 }
284
285 /**
286 * Parse/validate input value. See self::get_input_value()
287 * Performs stripslashes() and charset conversion if necessary
288 *
289 * @param string Input value
290 * @param boolean Allow HTML tags in field value
291 * @param string Charset to convert into
292 *
293 * @return string Parsed value
294 */
295 public static function parse_input_value($value, $allow_html = false, $charset = null)
296 {
297 global $OUTPUT;
298
299 if (empty($value)) {
300 return $value;
301 }
302
303 if (is_array($value)) {
304 foreach ($value as $idx => $val) {
305 $value[$idx] = self::parse_input_value($val, $allow_html, $charset);
306 }
307 return $value;
308 }
309
310 // remove HTML tags if not allowed
311 if (!$allow_html) {
312 $value = strip_tags($value);
313 }
314
315 $output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null;
316
317 // remove invalid characters (#1488124)
318 if ($output_charset == 'UTF-8') {
319 $value = rcube_charset::clean($value);
320 }
321
322 // convert to internal charset
323 if ($charset && $output_charset) {
324 $value = rcube_charset::convert($value, $output_charset, $charset);
325 }
326
327 return $value;
328 }
329
330 /**
331 * Convert array of request parameters (prefixed with _)
332 * to a regular array with non-prefixed keys.
333 *
334 * @param int $mode Source to get value from (GPC)
335 * @param string $ignore PCRE expression to skip parameters by name
336 * @param boolean $allow_html Allow HTML tags in field value
337 *
338 * @return array Hash array with all request parameters
339 */
340 public static function request2param($mode = null, $ignore = 'task|action', $allow_html = false)
341 {
342 $out = array();
343 $src = $mode == self::INPUT_GET ? $_GET : ($mode == self::INPUT_POST ? $_POST : $_REQUEST);
344
345 foreach (array_keys($src) as $key) {
346 $fname = $key[0] == '_' ? substr($key, 1) : $key;
347 if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname)) {
348 $out[$fname] = self::get_input_value($key, $mode, $allow_html);
349 }
350 }
351
352 return $out;
353 }
354
355 /**
356 * Convert the given string into a valid HTML identifier
357 * Same functionality as done in app.js with rcube_webmail.html_identifier()
358 */
359 public static function html_identifier($str, $encode=false)
360 {
361 if ($encode) {
362 return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
363 }
364 else {
365 return asciiwords($str, true, '_');
366 }
367 }
368
369 /**
370 * Replace all css definitions with #container [def]
371 * and remove css-inlined scripting, make position style safe
372 *
373 * @param string CSS source code
374 * @param string Container ID to use as prefix
375 * @param bool Allow remote content
376 *
377 * @return string Modified CSS source
378 */
379 public static function mod_css_styles($source, $container_id, $allow_remote = false)
380 {
381 $last_pos = 0;
382 $replacements = new rcube_string_replacer;
383
384 // ignore the whole block if evil styles are detected
385 $source = self::xss_entity_decode($source);
386 $stripped = preg_replace('/[^a-z\(:;]/i', '', $source);
387 $evilexpr = 'expression|behavior|javascript:|import[^a]' . (!$allow_remote ? '|url\((?!data:image)' : '');
388
389 if (preg_match("/$evilexpr/i", $stripped)) {
390 return '/* evil! */';
391 }
392
393 $strict_url_regexp = '!url\s*\([ "\'](https?:)//[a-z0-9/._+-]+["\' ]\)!Uims';
394
395 // cut out all contents between { and }
396 while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) {
397 $nested = strpos($source, '{', $pos+1);
398 if ($nested && $nested < $pos2) // when dealing with nested blocks (e.g. @media), take the inner one
399 $pos = $nested;
400 $length = $pos2 - $pos - 1;
401 $styles = substr($source, $pos+1, $length);
402
403 // Convert position:fixed to position:absolute (#5264)
404 $styles = preg_replace('/position:[\s\r\n]*fixed/i', 'position: absolute', $styles);
405
406 // check every line of a style block...
407 if ($allow_remote) {
408 $a_styles = preg_split('/;[\r\n]*/', $styles, -1, PREG_SPLIT_NO_EMPTY);
409
410 for ($i=0, $len=count($a_styles); $i < $len; $i++) {
411 $line = $a_styles[$i];
412 $stripped = preg_replace('/[^a-z\(:;]/i', '', $line);
413
414 // allow data:image uri, join with continuation
415 if (stripos($stripped, 'url(data:image')) {
416 $a_styles[$i] .= ';' . $a_styles[$i+1];
417 unset($a_styles[$i+1]);
418 }
419 // allow strict url() values only
420 else if (stripos($stripped, 'url(') && !preg_match($strict_url_regexp, $line)) {
421 $a_styles = array('/* evil! */');
422 break;
423 }
424 }
425
426 $styles = join(";\n", $a_styles);
427 }
428
429 $key = $replacements->add($styles);
430 $repl = $replacements->get_replacement($key);
431 $source = substr_replace($source, $repl, $pos+1, $length);
432 $last_pos = $pos2 - ($length - strlen($repl));
433 }
434
435 // remove html comments and add #container to each tag selector.
436 // also replace body definition because we also stripped off the <body> tag
437 $source = preg_replace(
438 array(
439 '/(^\s*<\!--)|(-->\s*$)/m',
440 // (?!##str) below is to not match with ##str_replacement_0##
441 // from rcube_string_replacer used above, this is needed for
442 // cases like @media { body { position: fixed; } } (#5811)
443 '/(^\s*|,\s*|\}\s*|\{\s*)((?!##str)[a-z0-9\._#\*][a-z0-9\.\-_]*)/im',
444 '/'.preg_quote($container_id, '/').'\s+body/i',
445 ),
446 array(
447 '',
448 "\\1#$container_id \\2",
449 $container_id,
450 ),
451 $source);
452
453 // put block contents back in
454 $source = $replacements->resolve($source);
455
456 return $source;
457 }
458
459 /**
460 * Generate CSS classes from mimetype and filename extension
461 *
462 * @param string $mimetype Mimetype
463 * @param string $filename Filename
464 *
465 * @return string CSS classes separated by space
466 */
467 public static function file2class($mimetype, $filename)
468 {
469 $mimetype = strtolower($mimetype);
470 $filename = strtolower($filename);
471
472 list($primary, $secondary) = explode('/', $mimetype);
473
474 $classes = array($primary ?: 'unknown');
475
476 if ($secondary) {
477 $classes[] = $secondary;
478 }
479
480 if (preg_match('/\.([a-z0-9]+)$/', $filename, $m)) {
481 if (!in_array($m[1], $classes)) {
482 $classes[] = $m[1];
483 }
484 }
485
486 return join(" ", $classes);
487 }
488
489 /**
490 * Decode escaped entities used by known XSS exploits.
491 * See http://downloads.securityfocus.com/vulnerabilities/exploits/26800.eml for examples
492 *
493 * @param string CSS content to decode
494 *
495 * @return string Decoded string
496 */
497 public static function xss_entity_decode($content)
498 {
499 $callback = function($matches) { return chr(hexdec($matches[1])); };
500
501 $out = html_entity_decode(html_entity_decode($content));
502 $out = trim(preg_replace('/(^<!--|-->$)/', '', trim($out)));
503 $out = preg_replace_callback('/\\\([0-9a-f]{4})/i', $callback, $out);
504 $out = preg_replace('#/\*.*\*/#Ums', '', $out);
505 $out = strip_tags($out);
506
507 return $out;
508 }
509
510 /**
511 * Check if we can process not exceeding memory_limit
512 *
513 * @param integer Required amount of memory
514 *
515 * @return boolean True if memory won't be exceeded, False otherwise
516 */
517 public static function mem_check($need)
518 {
519 $mem_limit = parse_bytes(ini_get('memory_limit'));
520 $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
521
522 return $mem_limit > 0 && $memory + $need > $mem_limit ? false : true;
523 }
524
525 /**
526 * Check if working in SSL mode
527 *
528 * @param integer $port HTTPS port number
529 * @param boolean $use_https Enables 'use_https' option checking
530 *
531 * @return boolean
532 */
533 public static function https_check($port=null, $use_https=true)
534 {
535 if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') {
536 return true;
537 }
538 if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])
539 && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https'
540 && in_array($_SERVER['REMOTE_ADDR'], rcube::get_instance()->config->get('proxy_whitelist', array()))
541 ) {
542 return true;
543 }
544 if ($port && $_SERVER['SERVER_PORT'] == $port) {
545 return true;
546 }
547 if ($use_https && rcube::get_instance()->config->get('use_https')) {
548 return true;
549 }
550
551 return false;
552 }
553
554 /**
555 * Replaces hostname variables.
556 *
557 * @param string $name Hostname
558 * @param string $host Optional IMAP hostname
559 *
560 * @return string Hostname
561 */
562 public static function parse_host($name, $host = '')
563 {
564 if (!is_string($name)) {
565 return $name;
566 }
567
568 // %n - host
569 $n = preg_replace('/:\d+$/', '', $_SERVER['SERVER_NAME']);
570 // %t - host name without first part, e.g. %n=mail.domain.tld, %t=domain.tld
571 $t = preg_replace('/^[^\.]+\./', '', $n);
572 // %d - domain name without first part
573 $d = preg_replace('/^[^\.]+\./', '', $_SERVER['HTTP_HOST']);
574 // %h - IMAP host
575 $h = $_SESSION['storage_host'] ?: $host;
576 // %z - IMAP domain without first part, e.g. %h=imap.domain.tld, %z=domain.tld
577 $z = preg_replace('/^[^\.]+\./', '', $h);
578 // %s - domain name after the '@' from e-mail address provided at login screen.
579 // Returns FALSE if an invalid email is provided
580 if (strpos($name, '%s') !== false) {
581 $user_email = self::get_input_value('_user', self::INPUT_POST);
582 $user_email = self::idn_convert($user_email, true);
583 $matches = preg_match('/(.*)@([a-z0-9\.\-\[\]\:]+)/i', $user_email, $s);
584 if ($matches < 1 || filter_var($s[1]."@".$s[2], FILTER_VALIDATE_EMAIL) === false) {
585 return false;
586 }
587 }
588
589 return str_replace(array('%n', '%t', '%d', '%h', '%z', '%s'), array($n, $t, $d, $h, $z, $s[2]), $name);
590 }
591
592 /**
593 * Returns remote IP address and forwarded addresses if found
594 *
595 * @return string Remote IP address(es)
596 */
597 public static function remote_ip()
598 {
599 $address = $_SERVER['REMOTE_ADDR'];
600
601 // append the NGINX X-Real-IP header, if set
602 if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
603 $remote_ip[] = 'X-Real-IP: ' . $_SERVER['HTTP_X_REAL_IP'];
604 }
605
606 // append the X-Forwarded-For header, if set
607 if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
608 $remote_ip[] = 'X-Forwarded-For: ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
609 }
610
611 if (!empty($remote_ip)) {
612 $address .= '(' . implode(',', $remote_ip) . ')';
613 }
614
615 return $address;
616 }
617
618 /**
619 * Returns the real remote IP address
620 *
621 * @return string Remote IP address
622 */
623 public static function remote_addr()
624 {
625 // Check if any of the headers are set first to improve performance
626 if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']) || !empty($_SERVER['HTTP_X_REAL_IP'])) {
627 $proxy_whitelist = rcube::get_instance()->config->get('proxy_whitelist', array());
628 if (in_array($_SERVER['REMOTE_ADDR'], $proxy_whitelist)) {
629 if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
630 foreach (array_reverse(explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'])) as $forwarded_ip) {
631 if (!in_array($forwarded_ip, $proxy_whitelist)) {
632 return $forwarded_ip;
633 }
634 }
635 }
636
637 if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
638 return $_SERVER['HTTP_X_REAL_IP'];
639 }
640 }
641 }
642
643 if (!empty($_SERVER['REMOTE_ADDR'])) {
644 return $_SERVER['REMOTE_ADDR'];
645 }
646
647 return '';
648 }
649
650 /**
651 * Read a specific HTTP request header.
652 *
653 * @param string $name Header name
654 *
655 * @return mixed Header value or null if not available
656 */
657 public static function request_header($name)
658 {
659 if (function_exists('getallheaders')) {
660 $hdrs = array_change_key_case(getallheaders(), CASE_UPPER);
661 $key = strtoupper($name);
662 }
663 else {
664 $key = 'HTTP_' . strtoupper(strtr($name, '-', '_'));
665 $hdrs = array_change_key_case($_SERVER, CASE_UPPER);
666 }
667
668 return $hdrs[$key];
669 }
670
671 /**
672 * Explode quoted string
673 *
674 * @param string Delimiter expression string for preg_match()
675 * @param string Input string
676 *
677 * @return array String items
678 */
679 public static function explode_quoted_string($delimiter, $string)
680 {
681 $result = array();
682 $strlen = strlen($string);
683
684 for ($q=$p=$i=0; $i < $strlen; $i++) {
685 if ($string[$i] == "\"" && $string[$i-1] != "\\") {
686 $q = $q ? false : true;
687 }
688 else if (!$q && preg_match("/$delimiter/", $string[$i])) {
689 $result[] = substr($string, $p, $i - $p);
690 $p = $i + 1;
691 }
692 }
693
694 $result[] = (string) substr($string, $p);
695
696 return $result;
697 }
698
699 /**
700 * Improved equivalent to strtotime()
701 *
702 * @param string $date Date string
703 * @param DateTimeZone $timezone Timezone to use for DateTime object
704 *
705 * @return int Unix timestamp
706 */
707 public static function strtotime($date, $timezone = null)
708 {
709 $date = self::clean_datestr($date);
710 $tzname = $timezone ? ' ' . $timezone->getName() : '';
711
712 // unix timestamp
713 if (is_numeric($date)) {
714 return (int) $date;
715 }
716
717 // if date parsing fails, we have a date in non-rfc format.
718 // remove token from the end and try again
719 while ((($ts = @strtotime($date . $tzname)) === false) || ($ts < 0)) {
720 $d = explode(' ', $date);
721 array_pop($d);
722 if (!$d) {
723 break;
724 }
725 $date = implode(' ', $d);
726 }
727
728 return (int) $ts;
729 }
730
731 /**
732 * Date parsing function that turns the given value into a DateTime object
733 *
734 * @param string $date Date string
735 * @param DateTimeZone $timezone Timezone to use for DateTime object
736 *
737 * @return DateTime instance or false on failure
738 */
739 public static function anytodatetime($date, $timezone = null)
740 {
741 if ($date instanceof DateTime) {
742 return $date;
743 }
744
745 $dt = false;
746 $date = self::clean_datestr($date);
747
748 // try to parse string with DateTime first
749 if (!empty($date)) {
750 try {
751 $dt = $timezone ? new DateTime($date, $timezone) : new DateTime($date);
752 }
753 catch (Exception $e) {
754 // ignore
755 }
756 }
757
758 // try our advanced strtotime() method
759 if (!$dt && ($timestamp = self::strtotime($date, $timezone))) {
760 try {
761 $dt = new DateTime("@".$timestamp);
762 if ($timezone) {
763 $dt->setTimezone($timezone);
764 }
765 }
766 catch (Exception $e) {
767 // ignore
768 }
769 }
770
771 return $dt;
772 }
773
774 /**
775 * Clean up date string for strtotime() input
776 *
777 * @param string $date Date string
778 *
779 * @return string Date string
780 */
781 public static function clean_datestr($date)
782 {
783 $date = trim($date);
784
785 // check for MS Outlook vCard date format YYYYMMDD
786 if (preg_match('/^([12][90]\d\d)([01]\d)([0123]\d)$/', $date, $m)) {
787 return sprintf('%04d-%02d-%02d 00:00:00', intval($m[1]), intval($m[2]), intval($m[3]));
788 }
789
790 // Clean malformed data
791 $date = preg_replace(
792 array(
793 '/GMT\s*([+-][0-9]+)/', // support non-standard "GMTXXXX" literal
794 '/[^a-z0-9\x20\x09:+-\/]/i', // remove any invalid characters
795 '/\s*(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s*/i', // remove weekday names
796 ),
797 array(
798 '\\1',
799 '',
800 '',
801 ), $date);
802
803 $date = trim($date);
804
805 // try to fix dd/mm vs. mm/dd discrepancy, we can't do more here
806 if (preg_match('/^(\d{1,2})[.\/-](\d{1,2})[.\/-](\d{4})(\s.*)?$/', $date, $m)) {
807 $mdy = $m[2] > 12 && $m[1] <= 12;
808 $day = $mdy ? $m[2] : $m[1];
809 $month = $mdy ? $m[1] : $m[2];
810 $date = sprintf('%04d-%02d-%02d%s', $m[3], $month, $day, $m[4] ?: ' 00:00:00');
811 }
812 // I've found that YYYY.MM.DD is recognized wrong, so here's a fix
813 else if (preg_match('/^(\d{4})\.(\d{1,2})\.(\d{1,2})(\s.*)?$/', $date, $m)) {
814 $date = sprintf('%04d-%02d-%02d%s', $m[1], $m[2], $m[3], $m[4] ?: ' 00:00:00');
815 }
816
817 return $date;
818 }
819
820 /**
821 * Turns the given date-only string in defined format into YYYY-MM-DD format.
822 *
823 * Supported formats: 'Y/m/d', 'Y.m.d', 'd-m-Y', 'd/m/Y', 'd.m.Y', 'j.n.Y'
824 *
825 * @param string $date Date string
826 * @param string $format Input date format
827 *
828 * @return strin Date string in YYYY-MM-DD format, or the original string
829 * if format is not supported
830 */
831 public static function format_datestr($date, $format)
832 {
833 $format_items = preg_split('/[.-\/\\\\]/', $format);
834 $date_items = preg_split('/[.-\/\\\\]/', $date);
835 $iso_format = '%04d-%02d-%02d';
836
837 if (count($format_items) == 3 && count($date_items) == 3) {
838 if ($format_items[0] == 'Y') {
839 $date = sprintf($iso_format, $date_items[0], $date_items[1], $date_items[2]);
840 }
841 else if (strpos('dj', $format_items[0]) !== false) {
842 $date = sprintf($iso_format, $date_items[2], $date_items[1], $date_items[0]);
843 }
844 else if (strpos('mn', $format_items[0]) !== false) {
845 $date = sprintf($iso_format, $date_items[2], $date_items[0], $date_items[1]);
846 }
847 }
848
849 return $date;
850 }
851
852 /*
853 * Idn_to_ascii wrapper.
854 * Intl/Idn modules version of this function doesn't work with e-mail address
855 */
856 public static function idn_to_ascii($str)
857 {
858 return self::idn_convert($str, true);
859 }
860
861 /*
862 * Idn_to_ascii wrapper.
863 * Intl/Idn modules version of this function doesn't work with e-mail address
864 */
865 public static function idn_to_utf8($str)
866 {
867 return self::idn_convert($str, false);
868 }
869
870 public static function idn_convert($input, $is_utf = false)
871 {
872 if ($at = strpos($input, '@')) {
873 $user = substr($input, 0, $at);
874 $domain = substr($input, $at+1);
875 }
876 else {
877 $domain = $input;
878 }
879
880 $domain = $is_utf ? idn_to_ascii($domain) : idn_to_utf8($domain);
881
882 if ($domain === false) {
883 return '';
884 }
885
886 return $at ? $user . '@' . $domain : $domain;
887 }
888
889 /**
890 * Split the given string into word tokens
891 *
892 * @param string Input to tokenize
893 * @param integer Minimum length of a single token
894 * @return array List of tokens
895 */
896 public static function tokenize_string($str, $minlen = 2)
897 {
898 $expr = array('/[\s;,"\'\/+-]+/ui', '/(\d)[-.\s]+(\d)/u');
899 $repl = array(' ', '\\1\\2');
900
901 if ($minlen > 1) {
902 $minlen--;
903 $expr[] = "/(^|\s+)\w{1,$minlen}(\s+|$)/u";
904 $repl[] = ' ';
905 }
906
907 return array_filter(explode(" ", preg_replace($expr, $repl, $str)));
908 }
909
910 /**
911 * Normalize the given string for fulltext search.
912 * Currently only optimized for ISO-8859-1 and ISO-8859-2 characters; to be extended
913 *
914 * @param string Input string (UTF-8)
915 * @param boolean True to return list of words as array
916 * @param integer Minimum length of tokens
917 *
918 * @return mixed Normalized string or a list of normalized tokens
919 */
920 public static function normalize_string($str, $as_array = false, $minlen = 2)
921 {
922 // replace 4-byte unicode characters with '?' character,
923 // these are not supported in default utf-8 charset on mysql,
924 // the chance we'd need them in searching is very low
925 $str = preg_replace('/('
926 . '\xF0[\x90-\xBF][\x80-\xBF]{2}'
927 . '|[\xF1-\xF3][\x80-\xBF]{3}'
928 . '|\xF4[\x80-\x8F][\x80-\xBF]{2}'
929 . ')/', '?', $str);
930
931 // split by words
932 $arr = self::tokenize_string($str, $minlen);
933
934 // detect character set
935 if (utf8_encode(utf8_decode($str)) == $str) {
936 // ISO-8859-1 (or ASCII)
937 preg_match_all('/./u', 'äâàåáãæçéêëèïîìíñöôòøõóüûùúýÿ', $keys);
938 preg_match_all('/./', 'aaaaaaaceeeeiiiinoooooouuuuyy', $values);
939
940 $mapping = array_combine($keys[0], $values[0]);
941 $mapping = array_merge($mapping, array('ß' => 'ss', 'ae' => 'a', 'oe' => 'o', 'ue' => 'u'));
942 }
943 else if (rcube_charset::convert(rcube_charset::convert($str, 'UTF-8', 'ISO-8859-2'), 'ISO-8859-2', 'UTF-8') == $str) {
944 // ISO-8859-2
945 preg_match_all('/./u', 'ąáâäćçčéęëěíîłľĺńňóôöŕřśšşťţůúűüźžżý', $keys);
946 preg_match_all('/./', 'aaaaccceeeeiilllnnooorrsssttuuuuzzzy', $values);
947
948 $mapping = array_combine($keys[0], $values[0]);
949 $mapping = array_merge($mapping, array('ß' => 'ss', 'ae' => 'a', 'oe' => 'o', 'ue' => 'u'));
950 }
951
952 foreach ($arr as $i => $part) {
953 $part = mb_strtolower($part);
954
955 if (!empty($mapping)) {
956 $part = strtr($part, $mapping);
957 }
958
959 $arr[$i] = $part;
960 }
961
962 return $as_array ? $arr : join(" ", $arr);
963 }
964
965 /**
966 * Compare two strings for matching words (order not relevant)
967 *
968 * @param string Haystack
969 * @param string Needle
970 *
971 * @return boolean True if match, False otherwise
972 */
973 public static function words_match($haystack, $needle)
974 {
975 $a_needle = self::tokenize_string($needle, 1);
976 $_haystack = join(" ", self::tokenize_string($haystack, 1));
977 $valid = strlen($_haystack) > 0;
978 $hits = 0;
979
980 foreach ($a_needle as $w) {
981 if ($valid) {
982 if (stripos($_haystack, $w) !== false) {
983 $hits++;
984 }
985 }
986 else if (stripos($haystack, $w) !== false) {
987 $hits++;
988 }
989 }
990
991 return $hits >= count($a_needle);
992 }
993
994 /**
995 * Parse commandline arguments into a hash array
996 *
997 * @param array $aliases Argument alias names
998 *
999 * @return array Argument values hash
1000 */
1001 public static function get_opt($aliases = array())
1002 {
1003 $args = array();
1004 $bool = array();
1005
1006 // find boolean (no value) options
1007 foreach ($aliases as $key => $alias) {
1008 if ($pos = strpos($alias, ':')) {
1009 $aliases[$key] = substr($alias, 0, $pos);
1010 $bool[] = $key;
1011 $bool[] = $aliases[$key];
1012 }
1013 }
1014
1015 for ($i=1; $i < count($_SERVER['argv']); $i++) {
1016 $arg = $_SERVER['argv'][$i];
1017 $value = true;
1018 $key = null;
1019
1020 if ($arg[0] == '-') {
1021 $key = preg_replace('/^-+/', '', $arg);
1022 $sp = strpos($arg, '=');
1023
1024 if ($sp > 0) {
1025 $key = substr($key, 0, $sp - 2);
1026 $value = substr($arg, $sp+1);
1027 }
1028 else if (in_array($key, $bool)) {
1029 $value = true;
1030 }
1031 else if (strlen($_SERVER['argv'][$i+1]) && $_SERVER['argv'][$i+1][0] != '-') {
1032 $value = $_SERVER['argv'][++$i];
1033 }
1034
1035 $args[$key] = is_string($value) ? preg_replace(array('/^["\']/', '/["\']$/'), '', $value) : $value;
1036 }
1037 else {
1038 $args[] = $arg;
1039 }
1040
1041 if ($alias = $aliases[$key]) {
1042 $args[$alias] = $args[$key];
1043 }
1044 }
1045
1046 return $args;
1047 }
1048
1049 /**
1050 * Safe password prompt for command line
1051 * from http://blogs.sitepoint.com/2009/05/01/interactive-cli-password-prompt-in-php/
1052 *
1053 * @return string Password
1054 */
1055 public static function prompt_silent($prompt = "Password:")
1056 {
1057 if (preg_match('/^win/i', PHP_OS)) {
1058 $vbscript = sys_get_temp_dir() . 'prompt_password.vbs';
1059 $vbcontent = 'wscript.echo(InputBox("' . addslashes($prompt) . '", "", "password here"))';
1060 file_put_contents($vbscript, $vbcontent);
1061
1062 $command = "cscript //nologo " . escapeshellarg($vbscript);
1063 $password = rtrim(shell_exec($command));
1064 unlink($vbscript);
1065
1066 return $password;
1067 }
1068 else {
1069 $command = "/usr/bin/env bash -c 'echo OK'";
1070 if (rtrim(shell_exec($command)) !== 'OK') {
1071 echo $prompt;
1072 $pass = trim(fgets(STDIN));
1073 echo chr(8)."\r" . $prompt . str_repeat("*", strlen($pass))."\n";
1074 return $pass;
1075 }
1076
1077 $command = "/usr/bin/env bash -c 'read -s -p \"" . addslashes($prompt) . "\" mypassword && echo \$mypassword'";
1078 $password = rtrim(shell_exec($command));
1079 echo "\n";
1080 return $password;
1081 }
1082 }
1083
1084 /**
1085 * Find out if the string content means true or false
1086 *
1087 * @param string $str Input value
1088 *
1089 * @return boolean Boolean value
1090 */
1091 public static function get_boolean($str)
1092 {
1093 $str = strtolower($str);
1094
1095 return !in_array($str, array('false', '0', 'no', 'off', 'nein', ''), true);
1096 }
1097
1098 /**
1099 * OS-dependent absolute path detection
1100 */
1101 public static function is_absolute_path($path)
1102 {
1103 if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
1104 return (bool) preg_match('!^[a-z]:[\\\\/]!i', $path);
1105 }
1106 else {
1107 return $path[0] == '/';
1108 }
1109 }
1110
1111 /**
1112 * Resolve relative URL
1113 *
1114 * @param string $url Relative URL
1115 *
1116 * @return string Absolute URL
1117 */
1118 public static function resolve_url($url)
1119 {
1120 // prepend protocol://hostname:port
1121 if (!preg_match('|^https?://|', $url)) {
1122 $schema = 'http';
1123 $default_port = 80;
1124
1125 if (self::https_check()) {
1126 $schema = 'https';
1127 $default_port = 443;
1128 }
1129
1130 $prefix = $schema . '://' . preg_replace('/:\d+$/', '', $_SERVER['HTTP_HOST']);
1131 if ($_SERVER['SERVER_PORT'] != $default_port) {
1132 $prefix .= ':' . $_SERVER['SERVER_PORT'];
1133 }
1134
1135 $url = $prefix . ($url[0] == '/' ? '' : '/') . $url;
1136 }
1137
1138 return $url;
1139 }
1140
1141 /**
1142 * Generate a random string
1143 *
1144 * @param int $length String length
1145 * @param bool $raw Return RAW data instead of ascii
1146 *
1147 * @return string The generated random string
1148 */
1149 public static function random_bytes($length, $raw = false)
1150 {
1151 $hextab = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1152 $tabsize = strlen($hextab);
1153
1154 // Use PHP7 true random generator
1155 if ($raw && function_exists('random_bytes')) {
1156 return random_bytes($length);
1157 }
1158
1159 if (!$raw && function_exists('random_int')) {
1160 $result = '';
1161 while ($length-- > 0) {
1162 $result .= $hextab[random_int(0, $tabsize - 1)];
1163 }
1164
1165 return $result;
1166 }
1167
1168 $random = openssl_random_pseudo_bytes($length);
1169
1170 if ($random === false && $length > 0) {
1171 throw new Exception("Failed to get random bytes");
1172 }
1173
1174 if (!$raw) {
1175 for ($x = 0; $x < $length; $x++) {
1176 $random[$x] = $hextab[ord($random[$x]) % $tabsize];
1177 }
1178 }
1179
1180 return $random;
1181 }
1182
1183 /**
1184 * Convert binary data into readable form (containing a-zA-Z0-9 characters)
1185 *
1186 * @param string $input Binary input
1187 *
1188 * @return string Readable output (Base62)
1189 * @deprecated since 1.3.1
1190 */
1191 public static function bin2ascii($input)
1192 {
1193 $hextab = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
1194 $result = '';
1195
1196 for ($x = 0; $x < strlen($input); $x++) {
1197 $result .= $hextab[ord($input[$x]) % 62];
1198 }
1199
1200 return $result;
1201 }
1202
1203 /**
1204 * Format current date according to specified format.
1205 * This method supports microseconds (u).
1206 *
1207 * @param string $format Date format (default: 'd-M-Y H:i:s O')
1208 *
1209 * @return string Formatted date
1210 */
1211 public static function date_format($format = null)
1212 {
1213 if (empty($format)) {
1214 $format = 'd-M-Y H:i:s O';
1215 }
1216
1217 if (strpos($format, 'u') !== false) {
1218 $dt = number_format(microtime(true), 6, '.', '');
1219 $dt .= '.' . date_default_timezone_get();
1220
1221 if ($date = date_create_from_format('U.u.e', $dt)) {
1222 return $date->format($format);
1223 }
1224 }
1225
1226 return date($format);
1227 }
1228
1229 /**
1230 * Parses socket options and returns options for specified hostname.
1231 *
1232 * @param array &$options Configured socket options
1233 * @param string $host Hostname
1234 */
1235 public static function parse_socket_options(&$options, $host = null)
1236 {
1237 if (empty($host) || empty($options)) {
1238 return $options;
1239 }
1240
1241 // get rid of schema and port from the hostname
1242 $host_url = parse_url($host);
1243 if (isset($host_url['host'])) {
1244 $host = $host_url['host'];
1245 }
1246
1247 // find per-host options
1248 if (array_key_exists($host, $options)) {
1249 $options = $options[$host];
1250 }
1251 }
1252
1253 /**
1254 * Get maximum upload size
1255 *
1256 * @return int Maximum size in bytes
1257 */
1258 public static function max_upload_size()
1259 {
1260 // find max filesize value
1261 $max_filesize = parse_bytes(ini_get('upload_max_filesize'));
1262 $max_postsize = parse_bytes(ini_get('post_max_size'));
1263
1264 if ($max_postsize && $max_postsize < $max_filesize) {
1265 $max_filesize = $max_postsize;
1266 }
1267
1268 return $max_filesize;
1269 }
1270 }