| 1 | <?php
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| 2 | /*
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| 3 | $Id: common.php 2275 2009-08-21 20:11:41Z andrewsimpson $
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| 4 |
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| 5 | (c) 2002 - 2009 Andrew Simpson <andrew.simpson at paradise.net.nz>
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| 6 |
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| 7 | WebCollab
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| 8 | ---------------------------------------
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| 9 |
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| 10 | This program is free software; you can redistribute it and/or modify it under the
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| 11 | terms of the GNU General Public License as published by the Free Software Foundation;
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| 12 | either version 2 of the License, or (at your option) any later version.
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| 13 |
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| 14 | This program is distributed in the hope that it will be useful, but WITHOUT ANY
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| 15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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| 16 | PARTICULAR PURPOSE. See the GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License along with this
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| 19 | program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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| 20 | Cambridge, MA 02139, USA.
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| 21 |
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| 22 | Function:
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| 23 | ---------
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| 24 |
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| 25 | Common functions library
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| 26 |
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| 27 | */
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| 28 |
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| 29 | //
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| 30 | // Input validation (single line input)
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| 31 | //
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| 32 | function safe_data($body ) {
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| 33 |
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| 34 | //remove excess whitespace
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| 35 | $body = trim($body);
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| 36 |
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| 37 | //return null for nothing input
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| 38 | if(strlen($body) == 0 ) {
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| 39 | return '';
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| 40 | }
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| 41 |
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| 42 | //validate characters
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| 43 | $body = validate($body);
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| 44 |
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| 45 | //limit line length for single line entries
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| 46 | if(strlen($body ) > 100 ) {
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| 47 | if(UNICODE_VERSION == 'Y' ) {
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| 48 | $body = mb_strimwidth($body, 0, 100, '...' );
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| 49 | }
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| 50 | else {
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| 51 | $body = substr($body, 0, 100 );
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | //remove line breaks (not allowed in single lines!)
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| 56 | $body = strtr($body, array("\r"=>' ', "\n"=>' ' ) );
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| 57 | //add HTML entities
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| 58 | $body = html_clean_up($body);
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| 59 | //prevent SQL injection
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| 60 | $body = db_escape_string($body );
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| 61 |
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| 62 | return $body;
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| 63 | }
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| 64 |
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| 65 | //
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| 66 | // Input validation (multiple line input)
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| 67 | //
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| 68 | function safe_data_long($body ) {
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| 69 |
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| 70 | //remove excess whitespace
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| 71 | $body = trim($body);
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| 72 |
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| 73 | //return null for nothing input
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| 74 | if(strlen($body) == 0 ) {
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| 75 | return '';
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| 76 | }
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| 77 |
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| 78 | //validate characters
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| 79 | $body = validate($body);
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| 80 |
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| 81 | //normalise line breaks from Windows & Mac to UNIX style '\n'
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| 82 | $body = str_replace("\r\n", "\n", $body );
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| 83 | $body = str_replace("\r", "\n", $body );
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| 84 | //break up long non-wrap words
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| 85 | $pattern_modifier = (UNICODE_VERSION == 'Y' ) ? 'u' : '';
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| 86 | $body = preg_replace("/[^\s\n\t]{100}/".$pattern_modifier, "$0\n", $body );
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| 87 | //add HTML entities
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| 88 | $body = html_clean_up($body);
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| 89 | //prevent SQL injection
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| 90 | $body = db_escape_string($body );
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| 91 |
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| 92 | return $body;
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| 93 | }
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| 94 |
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| 95 | function validate($body ) {
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| 96 |
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| 97 | //we don't use magic_quotes
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| 98 | if(get_magic_quotes_gpc() ) {
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| 99 | $body = stripslashes($body );
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| 100 | }
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| 101 |
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| 102 | if(UNICODE_VERSION == 'Y' || CHARACTER_SET == 'UTF-8' ) {
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| 103 |
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| 104 | $body = preg_replace('/[\x00-\x08\x10\x0B\x0C\x0E-\x19\x7F]'. //ASCII
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| 105 | '|[\x00-\x7F][\x80-\xBF]+'. //continuation with no start
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| 106 | '|[\xC0-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})'. //illegal two byte
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| 107 | '|[\xE0-\xEF](([\x80-\xBF](?![\x80-\xBF]))|(?![\x80-\xBF]{2})|[\x80-\xBF]{3,})'. //illegal three byte
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| 108 | '|[\xF0-\xFF][\x80-\xBF]*/', //reject more than 3 byte
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| 109 | '?', $body );
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| 110 |
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| 111 | $body = preg_replace('/[\xC0\xC1][\x80-\xBF]'. //exclude two byte over longs
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| 112 | '|\xE0[\x80-\x9F][\x80-\xBF]'. //exclude three byte over longs
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| 113 | '|\xED[\xA0-\xBF][\x80-\xBF]/','?', $body ); //exclude surrogates
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| 114 |
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| 115 | }
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| 116 | else {
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| 117 | //Single byte validation regex
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| 118 | // allow only normal printing characters valid for the character set in use
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| 119 | // character set regex in language file
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| 120 | $body = preg_replace(VALIDATION_REGEX, '?', $body );
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| 121 | }
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| 122 |
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| 123 | return $body;
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| 124 | }
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| 125 |
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| 126 | function html_clean_up($body ) {
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| 127 |
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| 128 | if(version_compare(PHP_VERSION, '5.2.3', '>=' ) ) {
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| 129 | $body = @htmlspecialchars($body, ENT_QUOTES, CHARACTER_SET, false );
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| 130 |
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| 131 | }
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| 132 | else {
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| 133 | //change '&' to '&' except when part of an entity, or already changed
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| 134 | if(! strpos($body, '&' ) === false ) {
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| 135 | $body = preg_replace('/&(?!(#[\d]{2,5}|amp);)/', '&', $body );
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| 136 | }
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| 137 | //use HTML for characters that could be used for xss <script>
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| 138 | // also convert quotes to HTML for XHTML compliance
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| 139 | $trans = array('<'=>'<', '>'=>'>', '"'=>'"', "'"=>''' );
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| 140 | $body = strtr($body, $trans );
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| 141 | }
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| 142 |
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| 143 | return $body;
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| 144 | }
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| 145 |
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| 146 | //
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| 147 | //check for true positive integer values to max size limits of PHP
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| 148 | //
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| 149 | function safe_integer($integer ) {
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| 150 |
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| 151 | if(is_numeric($integer) && ((string)$integer === (string)intval(abs($integer ) ) ) ) {
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| 152 | return true;
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| 153 | }
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| 154 | return false;
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| 155 | }
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| 156 |
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| 157 | //
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| 158 | // shorten a character string to 20 characters (to fit a small box)
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| 159 | //
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| 160 | function box_shorten($body, $len=20 ){
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| 161 |
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| 162 | $m_strlen = (UNICODE_VERSION == 'Y' ) ? 'mb_strlen' : 'strlen';
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| 163 | $m_substr = (UNICODE_VERSION == 'Y' ) ? 'mb_substr' : 'substr';
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| 164 |
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| 165 | if($m_strlen($body ) > $len ) {
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| 166 |
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| 167 | //rough cut to fit, then look for word boundaries for better cut
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| 168 | $first_cut = $m_substr($body, 0, ($len + 5 ) );
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| 169 | $last_space_pos = strrpos($first_cut, ' ' );
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| 170 |
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| 171 | //adjust to suit word boundary if possible
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| 172 | if(($last_space_pos === false ) || ($last_space_pos > ($len - 5 ) ) ) {
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| 173 | $len = $last_space_pos;
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| 174 | }
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| 175 | $body = substr($body, 0, $len );
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| 176 | $body .= ' ...';
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| 177 | }
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| 178 |
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| 179 | return $body;
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| 180 | }
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| 181 |
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| 182 | //
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| 183 | // single quotes in javascript fields are escaped
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| 184 | // double quotes are left as HTML (escaping won't work)
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| 185 | //
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| 186 | function javascript_escape($body ) {
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| 187 |
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| 188 | //convert HTML
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| 189 | $body = strtr($body, array('''=>"'") );
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| 190 | //escape quotes
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| 191 | $body = strtr($body, array("'"=>"\\'" ) );
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| 192 |
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| 193 | return $body;
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| 194 | }
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| 195 |
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| 196 | //
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| 197 | // add bbcode tags functionality
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| 198 | //
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| 199 | function bbcode($body ) {
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| 200 |
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| 201 | if(strlen($body) == 0 ) {
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| 202 | return '';
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| 203 | }
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| 204 |
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| 205 | if(! strpos($body, '@' ) === false ) {
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| 206 | //email links
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| 207 | $body = preg_replace('/\b[a-z0-9\.\_\-]+@[a-z0-9][a-z0-9\.\-]+\.[a-z\.]+\b/i', "<a href=\"mailto:$0\">$0</a>", $body );
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| 208 | }
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| 209 |
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| 210 | //bbcode tags
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| 211 | if(! strpos($body, '[/' ) === false ) {
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| 212 | $body = preg_replace('#\[i\](.+?)\[/i\]#i', "<i>$1</i>", $body );
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| 213 | $body = preg_replace('#\[b\](.+?)\[/b\]#i', "<b>$1</b>", $body );
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| 214 | $body = preg_replace('#\[u\](.+?)\[/u\]#i', "<span style=\"text-decoration: underline;\">$1</span>", $body );
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| 215 | $body = preg_replace('#\[quote\](.+?)\[/quote\]#i', "<blockquote><p>$1</p></blockquote>", $body );
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| 216 | $body = preg_replace('#\[code\](.+?)\[/code\]#i', "<pre>$1</pre>", $body );
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| 217 | $body = preg_replace('#\[color=(red|blue|green|yellow)\](.+?)\[/color\]#i', "<span style=\"color:$1\">$2</span>", $body );
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| 218 | $body = preg_replace('#\[img\](http(s)?:\/\/([a-z0-9\-_~/.])+?\.(jpg|jpeg|gif|png))\[/img\]#i', "<img src=\"$1\" alt=\"\"/>", $body );
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| 219 | $body = preg_replace_callback('#\[url\]((http|ftp)+(s)?:\/\/[a-z0-9\-_~/@:?=&;+\#.]+)\[/url\]#i', 'link1', $body );
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| 220 | $body = preg_replace_callback('#\[url=((http|ftp)+(s)?:\/\/([a-z0-9\-_~.]+[.][a-z]{2,6})[a-z0-9\-_~/@:?=&;+\#.%]*)\](.+?)\[/url\]#i', 'link2', $body );
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| 221 | }
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| 222 | return $body;
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| 223 | }
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| 224 |
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| 225 | function link1($url) {
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| 226 | $url[1] = strtr($url[1], array("&" => "&" ) );
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| 227 | $body = "<a href=\"".$url[1]."\" onclick=\"window.open('".$url[1]."'); return false\">".$url[1]."</a>";
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| 228 | return $body;
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| 229 | }
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| 230 |
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| 231 | function link2($url) {
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| 232 | $url[1] = strtr($url[1], array("&" => "&" ) );
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| 233 | $body = "<a href=\"".$url[1]."\" onclick=\"window.open('".$url[1]."'); return false\">".$url[5]."</a> [".$url[4]."]";
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| 234 | return $body;
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| 235 | }
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| 236 |
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| 237 | //
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| 238 | // Nice format for file size
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| 239 | //
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| 240 |
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| 241 | function nice_size($size ) {
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| 242 |
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| 243 | if(! $size ) {
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| 244 | $size = 0;
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| 245 | }
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| 246 | elseif($size > (1043741824 ) ) {
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| 247 | $size = sprintf('%.2f GB', ($size/(1043741824 ) ) );
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| 248 | }
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| 249 | elseif($size > (1048576 ) ) {
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| 250 | $size = sprintf('%.2f MB', ($size/(1048576 ) ) );
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| 251 | }
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| 252 | elseif($size > 1024 ) {
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| 253 | $size = (sprintf('%d kB', $size/(1024 ) ) );
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| 254 | }
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| 255 | else {
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| 256 | $size = (sprintf('%d B', $size ) );
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| 257 | }
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| 258 |
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| 259 | return $size;
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| 260 | }
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| 261 |
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| 262 | //
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| 263 | // Check security token still valid
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| 264 | //
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| 265 |
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| 266 | function token_check($token ) {
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| 267 |
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| 268 | if((! preg_match('/^[a-f\d]{32}$/i', $token ) ) || $token !== OLD_TOKEN ) {
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| 269 | error("Invalid session", "Possible session hijacking detected." );
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| 270 | }
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| 271 |
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| 272 | return true;
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| 273 | }
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| 274 |
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| 275 | //
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| 276 | // Builds up an error screen
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| 277 | //
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| 278 | function error($box_title, $error ) {
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| 279 |
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| 280 | global $db_error_message;
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| 281 |
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| 282 | include_once(BASE.'lang/lang.php' );
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| 283 | include_once(BASE.'includes/screen.php' );
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| 284 |
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| 285 | create_top('ERROR', 1 );
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| 286 |
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| 287 | if(NO_ERROR !== 'Y' ) {
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| 288 | $content = "<div style=\"text-align : center\">".$error."</div>";
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| 289 | new_box( $box_title, $content, 'boxdata', 'singlebox' );
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| 290 | }
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| 291 | else {
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| 292 | new_box($lang['report'], $lang['warning'], 'boxdata2', 'singlebox' );
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| 293 | }
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| 294 |
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| 295 | if((EMAIL_ERROR != NULL ) || (DEBUG === 'Y' ) ) {
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| 296 |
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| 297 | $uid_name = defined('UID_NAME') ? UID_NAME : '';
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| 298 | $uid_email = defined('UID_EMAIL') ? UID_EMAIL : '';
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| 299 | $manager_name = defined('MANAGER_NAME') ? MANAGER_NAME : 'WebCollab';
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| 300 |
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| 301 | //get the post vars
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| 302 | ob_start();
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| 303 | print_r($_REQUEST );
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| 304 | $post = ob_get_contents();
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| 305 | ob_end_clean();
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| 306 |
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| 307 | //email to the error address
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| 308 | $message = "Hello,\n This is the ".$manager_name." site and I have an error :/ \n".
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| 309 | "\n\n".
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| 310 | "Error message: ".$error."\n".
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| 311 | "Database message: ".$db_error_message."\n".
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| 312 | "User: ".$uid_name." (".$uid_email.")\n".
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| 313 | "Component: ".$box_title."\n".
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| 314 | "Page that was called: ".$_SERVER['SCRIPT_NAME']."\n".
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| 315 | "Requested URL: ".$_SERVER['REQUEST_URI']."\n".
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| 316 | "URL string: ".$_SERVER['QUERY_STRING']."\n".
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| 317 | "Browser: ".$_SERVER['HTTP_USER_AGENT']."\n".
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| 318 | "Time: ".date("F j, Y, H:i")."\n".
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| 319 | "IP: ".$_SERVER['REMOTE_ADDR']."\n".
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| 320 | "WebCollab version:".WEBCOLLAB_VERSION."\n".
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| 321 | "POST variables: $post\n\n";
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| 322 |
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| 323 | if(EMAIL_ERROR != NULL ) {
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| 324 | include_once(BASE.'includes/email.php' );
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| 325 | email(EMAIL_ERROR, "ERROR on ".MANAGER_NAME, $message );
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| 326 | }
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| 327 |
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| 328 | if(DEBUG === 'Y' ) {
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| 329 | $content = nl2br($message);
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| 330 | new_box("Error Debug", $content );
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| 331 | }
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| 332 | }
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| 333 |
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| 334 | create_bottom();
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| 335 |
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| 336 | //do not return
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| 337 | die;
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| 338 | }
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| 339 |
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| 340 | //
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| 341 | // Builds up a warning screen
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| 342 | //
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| 343 | function warning($box_title, $message ) {
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| 344 |
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| 345 | global $lang;
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| 346 |
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| 347 | include_once(BASE.'lang/lang.php' );
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| 348 | include_once(BASE.'includes/screen.php' );
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| 349 |
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| 350 | create_top($lang['error'], 1 );
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| 351 |
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| 352 | $content = "<div style=\"text-align : center\">".$message."</div>\n";
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| 353 | new_box($box_title, $content, 'boxdata', 'singlebox' );
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| 354 |
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| 355 | create_bottom();
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| 356 |
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| 357 | //do not return
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| 358 | die;
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| 359 | }
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| 360 |
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| 361 | ?>
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