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