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<?php |
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/** |
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* YOURLS modification of a small subset from WordPress' KSES implementation. |
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* Straight from the Let's Not Reinvent The Wheel department. |
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*/ |
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/** |
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* kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes |
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* Copyright (C) 2002, 2003, 2005 Ulf Harnhammar |
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* |
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* This program is free software and open source software; you can redistribute |
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* it and/or modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of the License, |
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* or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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* more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
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* http://www.gnu.org/licenses/gpl.html |
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* |
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* [kses strips evil scripts!] |
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* |
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* @version 0.2.2 |
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* @copyright (C) 2002, 2003, 2005 |
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* @author Ulf Harnhammar <http://advogato.org/person/metaur/> |
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* |
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* @package External |
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* @subpackage KSES |
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* |
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*/ |
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/* NOTE ABOUT GLOBALS |
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* Two globals are defined: $yourls_allowedentitynames and $yourls_allowedprotocols |
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* - $yourls_allowedentitynames is used internally in KSES functions to sanitize HTML entities |
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* - $yourls_allowedprotocols is used in various parts of YOURLS, not just in KSES, albeit being defined here |
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* Two globals are not defined and unused at this moment: $yourls_allowedtags_all and $yourls_allowedtags |
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* The code for these vars is here and ready for any future use |
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*/ |
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// Populate after plugins have loaded to allow user defined values |
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yourls_add_action( 'plugins_loaded', 'yourls_kses_init' ); |
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/** |
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* Init KSES globals if not already defined (by a plugin) |
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* |
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* @since 1.6 |
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* |
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*/ |
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function yourls_kses_init() { |
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global $yourls_allowedentitynames, $yourls_allowedprotocols; |
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if( ! $yourls_allowedentitynames ) { |
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$yourls_allowedentitynames = yourls_apply_filter( 'kses_allowed_entities', yourls_kses_allowed_entities() ); |
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} |
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if( ! $yourls_allowedprotocols ) { |
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$yourls_allowedprotocols = yourls_apply_filter( 'kses_allowed_protocols', yourls_kses_allowed_protocols() ); |
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} |
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/** See NOTE ABOUT GLOBALS ** |
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if( ! $yourls_allowedtags_all ) { |
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$yourls_allowedtags_all = yourls_kses_allowed_tags_all(); |
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$yourls_allowedtags_all = array_map( '_yourls_add_global_attributes', $yourls_allowedtags_all ); |
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$yourls_allowedtags_all = yourls_apply_filter( 'kses_allowed_tags_all', $yourls_allowedtags_all ); |
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} else { |
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// User defined: let's sanitize |
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$yourls_allowedtags_all = yourls_kses_array_lc( $yourls_allowedtags_all ); |
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} |
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if( ! $yourls_allowedtags ) { |
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$yourls_allowedtags = yourls_kses_allowed_tags(); |
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$yourls_allowedtags = array_map( '_yourls_add_global_attributes', $yourls_allowedtags ); |
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$yourls_allowedtags = yourls_apply_filter( 'kses_allowed_tags', $yourls_allowedtags ); |
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} else { |
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// User defined: let's sanitize |
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$yourls_allowedtags = yourls_kses_array_lc( $yourls_allowedtags ); |
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} |
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/**/ |
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} |
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/** |
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* Kses global for all allowable HTML tags. |
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* |
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* Complete (?) list of HTML tags. Keep this function available for any plugin or |
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* future feature that will want to display lots of HTML. |
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* |
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* @since 1.6 |
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* |
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* @return array All tags |
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*/ |
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function yourls_kses_allowed_tags_all() { |
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return array( |
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'address' => array(), |
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'a' => array( |
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'href' => true, |
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'rel' => true, |
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'rev' => true, |
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'name' => true, |
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'target' => true, |
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), |
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'abbr' => array(), |
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'acronym' => array(), |
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'area' => array( |
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'alt' => true, |
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'coords' => true, |
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'href' => true, |
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'nohref' => true, |
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'shape' => true, |
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'target' => true, |
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), |
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'article' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'aside' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'b' => array(), |
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'big' => array(), |
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'blockquote' => array( |
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'cite' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'br' => array(), |
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'button' => array( |
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'disabled' => true, |
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'name' => true, |
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'type' => true, |
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'value' => true, |
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), |
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'caption' => array( |
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'align' => true, |
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), |
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'cite' => array( |
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'dir' => true, |
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'lang' => true, |
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), |
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'code' => array(), |
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'col' => array( |
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'align' => true, |
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'char' => true, |
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'charoff' => true, |
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'span' => true, |
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'dir' => true, |
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'valign' => true, |
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'width' => true, |
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), |
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'del' => array( |
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'datetime' => true, |
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), |
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'dd' => array(), |
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'details' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'open' => true, |
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'xml:lang' => true, |
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), |
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'div' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'dl' => array(), |
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'dt' => array(), |
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'em' => array(), |
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'fieldset' => array(), |
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'figure' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'figcaption' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'font' => array( |
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'color' => true, |
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'face' => true, |
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'size' => true, |
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198
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), |
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'footer' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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'xml:lang' => true, |
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), |
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'form' => array( |
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206
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'action' => true, |
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'accept' => true, |
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'accept-charset' => true, |
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'enctype' => true, |
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210
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'method' => true, |
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'name' => true, |
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212
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'target' => true, |
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213
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), |
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'h1' => array( |
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215
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'align' => true, |
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), |
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'h2' => array( |
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'align' => true, |
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), |
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'h3' => array( |
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221
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'align' => true, |
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), |
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'h4' => array( |
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224
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'align' => true, |
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225
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), |
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226
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'h5' => array( |
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227
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'align' => true, |
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), |
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'h6' => array( |
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230
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'align' => true, |
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231
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), |
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'header' => array( |
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'align' => true, |
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'dir' => true, |
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'lang' => true, |
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236
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'xml:lang' => true, |
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237
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), |
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238
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'hgroup' => array( |
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239
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'align' => true, |
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240
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'dir' => true, |
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241
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'lang' => true, |
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242
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'xml:lang' => true, |
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243
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), |
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244
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'hr' => array( |
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245
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'align' => true, |
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246
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'noshade' => true, |
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247
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'size' => true, |
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248
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'width' => true, |
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249
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), |
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250
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'i' => array(), |
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|
251
|
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|
'img' => array( |
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|
252
|
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'alt' => true, |
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253
|
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'align' => true, |
|
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|
254
|
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|
'border' => true, |
|
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|
255
|
|
|
'height' => true, |
|
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256
|
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|
'hspace' => true, |
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257
|
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'longdesc' => true, |
|
258
|
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'vspace' => true, |
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259
|
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|
'src' => true, |
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260
|
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'usemap' => true, |
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261
|
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'width' => true, |
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|
262
|
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), |
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|
263
|
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|
'ins' => array( |
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264
|
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|
'datetime' => true, |
|
265
|
|
|
'cite' => true, |
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|
266
|
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|
), |
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|
267
|
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|
'kbd' => array(), |
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268
|
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'label' => array( |
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269
|
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'for' => true, |
|
270
|
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|
), |
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|
271
|
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|
'legend' => array( |
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272
|
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|
'align' => true, |
|
273
|
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|
), |
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|
274
|
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|
'li' => array( |
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275
|
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|
'align' => true, |
|
276
|
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|
), |
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|
277
|
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|
'map' => array( |
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278
|
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'name' => true, |
|
279
|
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|
), |
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|
280
|
|
|
'menu' => array( |
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|
281
|
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|
'type' => true, |
|
282
|
|
|
), |
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|
283
|
|
|
'nav' => array( |
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|
284
|
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|
'align' => true, |
|
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|
285
|
|
|
'dir' => true, |
|
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|
286
|
|
|
'lang' => true, |
|
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|
287
|
|
|
'xml:lang' => true, |
|
288
|
|
|
), |
|
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|
289
|
|
|
'p' => array( |
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|
290
|
|
|
'align' => true, |
|
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|
291
|
|
|
'dir' => true, |
|
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|
292
|
|
|
'lang' => true, |
|
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|
293
|
|
|
'xml:lang' => true, |
|
294
|
|
|
), |
|
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|
|
|
|
295
|
|
|
'pre' => array( |
|
|
|
|
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|
296
|
|
|
'width' => true, |
|
297
|
|
|
), |
|
|
|
|
|
|
298
|
|
|
'q' => array( |
|
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|
|
|
|
299
|
|
|
'cite' => true, |
|
300
|
|
|
), |
|
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|
|
|
|
301
|
|
|
's' => array(), |
|
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|
|
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|
302
|
|
|
'span' => array( |
|
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|
|
|
|
303
|
|
|
'dir' => true, |
|
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|
|
|
|
304
|
|
|
'align' => true, |
|
|
|
|
|
|
305
|
|
|
'lang' => true, |
|
|
|
|
|
|
306
|
|
|
'xml:lang' => true, |
|
307
|
|
|
), |
|
|
|
|
|
|
308
|
|
|
'section' => array( |
|
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|
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|
309
|
|
|
'align' => true, |
|
|
|
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|
|
310
|
|
|
'dir' => true, |
|
|
|
|
|
|
311
|
|
|
'lang' => true, |
|
|
|
|
|
|
312
|
|
|
'xml:lang' => true, |
|
313
|
|
|
), |
|
|
|
|
|
|
314
|
|
|
'small' => array(), |
|
|
|
|
|
|
315
|
|
|
'strike' => array(), |
|
|
|
|
|
|
316
|
|
|
'strong' => array(), |
|
|
|
|
|
|
317
|
|
|
'sub' => array(), |
|
|
|
|
|
|
318
|
|
|
'summary' => array( |
|
|
|
|
|
|
319
|
|
|
'align' => true, |
|
|
|
|
|
|
320
|
|
|
'dir' => true, |
|
|
|
|
|
|
321
|
|
|
'lang' => true, |
|
|
|
|
|
|
322
|
|
|
'xml:lang' => true, |
|
323
|
|
|
), |
|
|
|
|
|
|
324
|
|
|
'sup' => array(), |
|
|
|
|
|
|
325
|
|
|
'table' => array( |
|
|
|
|
|
|
326
|
|
|
'align' => true, |
|
|
|
|
|
|
327
|
|
|
'bgcolor' => true, |
|
|
|
|
|
|
328
|
|
|
'border' => true, |
|
|
|
|
|
|
329
|
|
|
'cellpadding' => true, |
|
330
|
|
|
'cellspacing' => true, |
|
331
|
|
|
'dir' => true, |
|
|
|
|
|
|
332
|
|
|
'rules' => true, |
|
|
|
|
|
|
333
|
|
|
'summary' => true, |
|
|
|
|
|
|
334
|
|
|
'width' => true, |
|
|
|
|
|
|
335
|
|
|
), |
|
|
|
|
|
|
336
|
|
|
'tbody' => array( |
|
|
|
|
|
|
337
|
|
|
'align' => true, |
|
|
|
|
|
|
338
|
|
|
'char' => true, |
|
|
|
|
|
|
339
|
|
|
'charoff' => true, |
|
340
|
|
|
'valign' => true, |
|
|
|
|
|
|
341
|
|
|
), |
|
|
|
|
|
|
342
|
|
|
'td' => array( |
|
|
|
|
|
|
343
|
|
|
'abbr' => true, |
|
|
|
|
|
|
344
|
|
|
'align' => true, |
|
|
|
|
|
|
345
|
|
|
'axis' => true, |
|
|
|
|
|
|
346
|
|
|
'bgcolor' => true, |
|
347
|
|
|
'char' => true, |
|
|
|
|
|
|
348
|
|
|
'charoff' => true, |
|
349
|
|
|
'colspan' => true, |
|
350
|
|
|
'dir' => true, |
|
|
|
|
|
|
351
|
|
|
'headers' => true, |
|
352
|
|
|
'height' => true, |
|
|
|
|
|
|
353
|
|
|
'nowrap' => true, |
|
|
|
|
|
|
354
|
|
|
'rowspan' => true, |
|
355
|
|
|
'scope' => true, |
|
|
|
|
|
|
356
|
|
|
'valign' => true, |
|
|
|
|
|
|
357
|
|
|
'width' => true, |
|
|
|
|
|
|
358
|
|
|
), |
|
|
|
|
|
|
359
|
|
|
'textarea' => array( |
|
|
|
|
|
|
360
|
|
|
'cols' => true, |
|
|
|
|
|
|
361
|
|
|
'rows' => true, |
|
|
|
|
|
|
362
|
|
|
'disabled' => true, |
|
363
|
|
|
'name' => true, |
|
|
|
|
|
|
364
|
|
|
'readonly' => true, |
|
365
|
|
|
), |
|
|
|
|
|
|
366
|
|
|
'tfoot' => array( |
|
|
|
|
|
|
367
|
|
|
'align' => true, |
|
|
|
|
|
|
368
|
|
|
'char' => true, |
|
|
|
|
|
|
369
|
|
|
'charoff' => true, |
|
370
|
|
|
'valign' => true, |
|
|
|
|
|
|
371
|
|
|
), |
|
|
|
|
|
|
372
|
|
|
'th' => array( |
|
|
|
|
|
|
373
|
|
|
'abbr' => true, |
|
|
|
|
|
|
374
|
|
|
'align' => true, |
|
|
|
|
|
|
375
|
|
|
'axis' => true, |
|
|
|
|
|
|
376
|
|
|
'bgcolor' => true, |
|
377
|
|
|
'char' => true, |
|
|
|
|
|
|
378
|
|
|
'charoff' => true, |
|
379
|
|
|
'colspan' => true, |
|
380
|
|
|
'headers' => true, |
|
381
|
|
|
'height' => true, |
|
|
|
|
|
|
382
|
|
|
'nowrap' => true, |
|
|
|
|
|
|
383
|
|
|
'rowspan' => true, |
|
384
|
|
|
'scope' => true, |
|
|
|
|
|
|
385
|
|
|
'valign' => true, |
|
|
|
|
|
|
386
|
|
|
'width' => true, |
|
|
|
|
|
|
387
|
|
|
), |
|
|
|
|
|
|
388
|
|
|
'thead' => array( |
|
|
|
|
|
|
389
|
|
|
'align' => true, |
|
|
|
|
|
|
390
|
|
|
'char' => true, |
|
|
|
|
|
|
391
|
|
|
'charoff' => true, |
|
392
|
|
|
'valign' => true, |
|
|
|
|
|
|
393
|
|
|
), |
|
|
|
|
|
|
394
|
|
|
'title' => array(), |
|
|
|
|
|
|
395
|
|
|
'tr' => array( |
|
|
|
|
|
|
396
|
|
|
'align' => true, |
|
|
|
|
|
|
397
|
|
|
'bgcolor' => true, |
|
398
|
|
|
'char' => true, |
|
|
|
|
|
|
399
|
|
|
'charoff' => true, |
|
400
|
|
|
'valign' => true, |
|
|
|
|
|
|
401
|
|
|
), |
|
|
|
|
|
|
402
|
|
|
'tt' => array(), |
|
|
|
|
|
|
403
|
|
|
'u' => array(), |
|
|
|
|
|
|
404
|
|
|
'ul' => array( |
|
|
|
|
|
|
405
|
|
|
'type' => true, |
|
406
|
|
|
), |
|
|
|
|
|
|
407
|
|
|
'ol' => array( |
|
|
|
|
|
|
408
|
|
|
'start' => true, |
|
409
|
|
|
'type' => true, |
|
|
|
|
|
|
410
|
|
|
), |
|
|
|
|
|
|
411
|
|
|
'var' => array(), |
|
|
|
|
|
|
412
|
|
|
); |
|
|
|
|
|
|
413
|
|
|
} |
|
414
|
|
|
|
|
415
|
|
|
/** |
|
416
|
|
|
* Kses global for default allowable HTML tags. TODO: trim down to necessary only. |
|
417
|
|
|
* |
|
418
|
|
|
* Short list of HTML tags used in YOURLS core for display |
|
419
|
|
|
* |
|
420
|
|
|
* @since 1.6 |
|
421
|
|
|
* |
|
422
|
|
|
* @return array Allowed tags |
|
423
|
|
|
*/ |
|
424
|
|
|
function yourls_kses_allowed_tags() { |
|
425
|
|
|
return array( |
|
426
|
|
|
'a' => array( |
|
|
|
|
|
|
427
|
1 |
|
'href' => true, |
|
|
|
|
|
|
428
|
|
|
'title' => true, |
|
429
|
|
|
), |
|
|
|
|
|
|
430
|
|
|
'abbr' => array( |
|
|
|
|
|
|
431
|
|
|
'title' => true, |
|
432
|
|
|
), |
|
|
|
|
|
|
433
|
|
|
'acronym' => array( |
|
|
|
|
|
|
434
|
|
|
'title' => true, |
|
435
|
|
|
), |
|
|
|
|
|
|
436
|
|
|
'b' => array(), |
|
|
|
|
|
|
437
|
|
|
'blockquote' => array( |
|
|
|
|
|
|
438
|
|
|
'cite' => true, |
|
439
|
|
|
), |
|
|
|
|
|
|
440
|
|
|
'cite' => array(), |
|
|
|
|
|
|
441
|
|
|
'code' => array(), |
|
|
|
|
|
|
442
|
|
|
'del' => array( |
|
|
|
|
|
|
443
|
|
|
'datetime' => true, |
|
444
|
|
|
), |
|
|
|
|
|
|
445
|
|
|
'em' => array(), |
|
|
|
|
|
|
446
|
|
|
'i' => array(), |
|
|
|
|
|
|
447
|
|
|
'q' => array( |
|
|
|
|
|
|
448
|
|
|
'cite' => true, |
|
449
|
|
|
), |
|
|
|
|
|
|
450
|
|
|
'strike' => array(), |
|
|
|
|
|
|
451
|
|
|
'strong' => array(), |
|
|
|
|
|
|
452
|
|
|
); |
|
|
|
|
|
|
453
|
|
|
} |
|
454
|
|
|
|
|
455
|
|
|
/** |
|
456
|
|
|
* Kses global for allowable HTML entities. |
|
457
|
|
|
* |
|
458
|
|
|
* @since 1.6 |
|
459
|
|
|
* |
|
460
|
|
|
* @return array Allowed entities |
|
461
|
|
|
*/ |
|
462
|
|
|
function yourls_kses_allowed_entities() { |
|
463
|
|
|
return array( |
|
464
|
2 |
|
'nbsp', 'iexcl', 'cent', 'pound', 'curren', 'yen', |
|
|
|
|
|
|
465
|
|
|
'brvbar', 'sect', 'uml', 'copy', 'ordf', 'laquo', |
|
|
|
|
|
|
466
|
|
|
'not', 'shy', 'reg', 'macr', 'deg', 'plusmn', |
|
|
|
|
|
|
467
|
|
|
'acute', 'micro', 'para', 'middot', 'cedil', 'ordm', |
|
|
|
|
|
|
468
|
|
|
'raquo', 'iquest', 'Agrave', 'Aacute', 'Acirc', 'Atilde', |
|
|
|
|
|
|
469
|
|
|
'Auml', 'Aring', 'AElig', 'Ccedil', 'Egrave', 'Eacute', |
|
|
|
|
|
|
470
|
|
|
'Ecirc', 'Euml', 'Igrave', 'Iacute', 'Icirc', 'Iuml', |
|
|
|
|
|
|
471
|
|
|
'ETH', 'Ntilde', 'Ograve', 'Oacute', 'Ocirc', 'Otilde', |
|
|
|
|
|
|
472
|
|
|
'Ouml', 'times', 'Oslash', 'Ugrave', 'Uacute', 'Ucirc', |
|
|
|
|
|
|
473
|
|
|
'Uuml', 'Yacute', 'THORN', 'szlig', 'agrave', 'aacute', |
|
|
|
|
|
|
474
|
|
|
'acirc', 'atilde', 'auml', 'aring', 'aelig', 'ccedil', |
|
|
|
|
|
|
475
|
|
|
'egrave', 'eacute', 'ecirc', 'euml', 'igrave', 'iacute', |
|
|
|
|
|
|
476
|
|
|
'icirc', 'iuml', 'eth', 'ntilde', 'ograve', 'oacute', |
|
|
|
|
|
|
477
|
|
|
'ocirc', 'otilde', 'ouml', 'divide', 'oslash', 'ugrave', |
|
|
|
|
|
|
478
|
|
|
'uacute', 'ucirc', 'uuml', 'yacute', 'thorn', 'yuml', |
|
|
|
|
|
|
479
|
|
|
'quot', 'amp', 'lt', 'gt', 'apos', 'OElig', |
|
|
|
|
|
|
480
|
|
|
'oelig', 'Scaron', 'scaron', 'Yuml', 'circ', 'tilde', |
|
|
|
|
|
|
481
|
|
|
'ensp', 'emsp', 'thinsp', 'zwnj', 'zwj', 'lrm', |
|
|
|
|
|
|
482
|
|
|
'rlm', 'ndash', 'mdash', 'lsquo', 'rsquo', 'sbquo', |
|
|
|
|
|
|
483
|
|
|
'ldquo', 'rdquo', 'bdquo', 'dagger', 'Dagger', 'permil', |
|
|
|
|
|
|
484
|
|
|
'lsaquo', 'rsaquo', 'euro', 'fnof', 'Alpha', 'Beta', |
|
|
|
|
|
|
485
|
|
|
'Gamma', 'Delta', 'Epsilon', 'Zeta', 'Eta', 'Theta', |
|
|
|
|
|
|
486
|
|
|
'Iota', 'Kappa', 'Lambda', 'Mu', 'Nu', 'Xi', |
|
|
|
|
|
|
487
|
|
|
'Omicron', 'Pi', 'Rho', 'Sigma', 'Tau', 'Upsilon', |
|
|
|
|
|
|
488
|
|
|
'Phi', 'Chi', 'Psi', 'Omega', 'alpha', 'beta', |
|
|
|
|
|
|
489
|
|
|
'gamma', 'delta', 'epsilon', 'zeta', 'eta', 'theta', |
|
|
|
|
|
|
490
|
|
|
'iota', 'kappa', 'lambda', 'mu', 'nu', 'xi', |
|
|
|
|
|
|
491
|
|
|
'omicron', 'pi', 'rho', 'sigmaf', 'sigma', 'tau', |
|
|
|
|
|
|
492
|
|
|
'upsilon', 'phi', 'chi', 'psi', 'omega', 'thetasym', |
|
|
|
|
|
|
493
|
|
|
'upsih', 'piv', 'bull', 'hellip', 'prime', 'Prime', |
|
|
|
|
|
|
494
|
|
|
'oline', 'frasl', 'weierp', 'image', 'real', 'trade', |
|
|
|
|
|
|
495
|
|
|
'alefsym', 'larr', 'uarr', 'rarr', 'darr', 'harr', |
|
|
|
|
|
|
496
|
|
|
'crarr', 'lArr', 'uArr', 'rArr', 'dArr', 'hArr', |
|
|
|
|
|
|
497
|
|
|
'forall', 'part', 'exist', 'empty', 'nabla', 'isin', |
|
|
|
|
|
|
498
|
|
|
'notin', 'ni', 'prod', 'sum', 'minus', 'lowast', |
|
|
|
|
|
|
499
|
|
|
'radic', 'prop', 'infin', 'ang', 'and', 'or', |
|
|
|
|
|
|
500
|
|
|
'cap', 'cup', 'int', 'sim', 'cong', 'asymp', |
|
|
|
|
|
|
501
|
|
|
'ne', 'equiv', 'le', 'ge', 'sub', 'sup', |
|
|
|
|
|
|
502
|
|
|
'nsub', 'sube', 'supe', 'oplus', 'otimes', 'perp', |
|
|
|
|
|
|
503
|
|
|
'sdot', 'lceil', 'rceil', 'lfloor', 'rfloor', 'lang', |
|
|
|
|
|
|
504
|
|
|
'rang', 'loz', 'spades', 'clubs', 'hearts', 'diams', |
|
|
|
|
|
|
505
|
|
|
); |
|
|
|
|
|
|
506
|
|
|
} |
|
507
|
|
|
|
|
508
|
|
|
/** |
|
509
|
|
|
* Kses global for allowable protocols. |
|
510
|
|
|
* |
|
511
|
|
|
* @since 1.6 |
|
512
|
|
|
* |
|
513
|
|
|
* @return array Allowed protocols |
|
514
|
|
|
*/ |
|
515
|
|
|
function yourls_kses_allowed_protocols() { |
|
516
|
|
|
// More or less common stuff in links. From http://en.wikipedia.org/wiki/URI_scheme |
|
517
|
|
|
return array( |
|
518
|
|
|
// Common |
|
519
|
2 |
|
'http://', 'https://', 'ftp://', |
|
|
|
|
|
|
520
|
|
|
'file://', 'smb://', |
|
|
|
|
|
|
521
|
|
|
'sftp://', |
|
|
|
|
|
|
522
|
|
|
'feed:', 'feed://', |
|
|
|
|
|
|
523
|
|
|
'mailto:', |
|
|
|
|
|
|
524
|
|
|
'news:', 'nntp://', |
|
|
|
|
|
|
525
|
|
|
|
|
526
|
|
|
// Old school bearded geek |
|
527
|
|
|
'gopher://', 'telnet://', 'finger://', |
|
|
|
|
|
|
528
|
|
|
'nntp://', 'worldwind://', |
|
|
|
|
|
|
529
|
|
|
|
|
530
|
|
|
// Dev |
|
531
|
|
|
'ssh://', 'svn://', 'svn+ssh://', 'git://', 'cvs://', |
|
|
|
|
|
|
532
|
|
|
'apt:', |
|
|
|
|
|
|
533
|
|
|
'market://', // Google Play |
|
|
|
|
|
|
534
|
|
|
'view-source:', |
|
|
|
|
|
|
535
|
|
|
|
|
536
|
|
|
// P2P |
|
537
|
|
|
'ed2k://', 'magnet:', 'udp://', |
|
|
|
|
|
|
538
|
|
|
|
|
539
|
|
|
// Streaming stuff |
|
540
|
|
|
'mms://', 'lastfm://', 'spotify:', 'rtsp://', |
|
|
|
|
|
|
541
|
|
|
|
|
542
|
|
|
// Text & voice |
|
543
|
|
|
'aim:', 'facetime://', 'gtalk:', 'xmpp:', |
|
|
|
|
|
|
544
|
|
|
'irc://', 'ircs://', 'mumble://', |
|
|
|
|
|
|
545
|
|
|
'callto:', 'skype:', 'sip:', |
|
|
|
|
|
|
546
|
|
|
'teamspeak://', 'tel:', 'ventrilo://', 'xfire:', |
|
|
|
|
|
|
547
|
|
|
'ymsgr:', 'tg://', 'whatsapp://', |
|
|
|
|
|
|
548
|
|
|
|
|
549
|
|
|
// Misc |
|
550
|
|
|
'steam:', 'steam://', |
|
|
|
|
|
|
551
|
|
|
'bitcoin:', |
|
|
|
|
|
|
552
|
|
|
'ldap://', 'ldaps://', |
|
|
|
|
|
|
553
|
|
|
|
|
554
|
|
|
// Purposedly removed for security |
|
555
|
|
|
/* |
|
|
|
|
|
|
556
|
|
|
'about:', 'chrome://', 'chrome-extension://', |
|
|
|
|
|
|
557
|
|
|
'javascript:', |
|
|
|
|
|
|
558
|
|
|
'data:', |
|
|
|
|
|
|
559
|
|
|
*/ |
|
|
|
|
|
|
560
|
|
|
); |
|
|
|
|
|
|
561
|
|
|
} |
|
562
|
|
|
|
|
563
|
|
|
|
|
564
|
|
|
/** |
|
565
|
|
|
* Converts and fixes HTML entities. |
|
566
|
|
|
* |
|
567
|
|
|
* This function normalizes HTML entities. It will convert "AT&T" to the correct |
|
568
|
|
|
* "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on. |
|
569
|
|
|
* |
|
570
|
|
|
* @since 1.6 |
|
571
|
|
|
* |
|
572
|
|
|
* @param string $string Content to normalize entities |
|
573
|
|
|
* @return string Content with normalized entities |
|
574
|
|
|
*/ |
|
575
|
|
|
function yourls_kses_normalize_entities($string) { |
|
576
|
|
|
# Disarm all entities by converting & to & |
|
577
|
|
|
|
|
578
|
25 |
|
$string = str_replace('&', '&', $string); |
|
579
|
|
|
|
|
580
|
|
|
# Change back the allowed entities in our entity whitelist |
|
581
|
|
|
|
|
582
|
25 |
|
$string = preg_replace_callback('/&([A-Za-z]{2,8});/', 'yourls_kses_named_entities', $string); |
|
583
|
25 |
|
$string = preg_replace_callback('/&#(0*[0-9]{1,7});/', 'yourls_kses_normalize_entities2', $string); |
|
|
|
|
|
|
584
|
25 |
|
$string = preg_replace_callback('/&#[Xx](0*[0-9A-Fa-f]{1,6});/', 'yourls_kses_normalize_entities3', $string); |
|
|
|
|
|
|
585
|
|
|
|
|
586
|
25 |
|
return $string; |
|
587
|
|
|
} |
|
588
|
|
|
|
|
589
|
|
|
/** |
|
590
|
|
|
* Callback for yourls_kses_normalize_entities() regular expression. |
|
591
|
|
|
* |
|
592
|
|
|
* This function only accepts valid named entity references, which are finite, |
|
593
|
|
|
* case-sensitive, and highly scrutinized by HTML and XML validators. |
|
594
|
|
|
* |
|
595
|
|
|
* @since 1.6 |
|
596
|
|
|
* |
|
597
|
|
|
* @param array $matches preg_replace_callback() matches array |
|
598
|
|
|
* @return string Correctly encoded entity |
|
599
|
|
|
*/ |
|
600
|
|
|
function yourls_kses_named_entities($matches) { |
|
601
|
5 |
|
global $yourls_allowedentitynames; |
|
602
|
|
|
|
|
603
|
5 |
|
if ( empty($matches[1]) ) |
|
604
|
|
|
return ''; |
|
605
|
|
|
|
|
606
|
5 |
|
$i = $matches[1]; |
|
607
|
5 |
|
return ( ( ! in_array($i, $yourls_allowedentitynames) ) ? "&$i;" : "&$i;" ); |
|
|
|
|
|
|
608
|
|
|
} |
|
609
|
|
|
|
|
610
|
|
|
/** |
|
611
|
|
|
* Callback for yourls_kses_normalize_entities() regular expression. |
|
612
|
|
|
* |
|
613
|
|
|
* This function helps yourls_kses_normalize_entities() to only accept 16-bit values |
|
614
|
|
|
* and nothing more for &#number; entities. |
|
615
|
|
|
* |
|
616
|
|
|
* @access private |
|
617
|
|
|
* @since 1.6 |
|
618
|
|
|
* |
|
619
|
|
|
* @param array $matches preg_replace_callback() matches array |
|
620
|
|
|
* @return string Correctly encoded entity |
|
621
|
|
|
*/ |
|
622
|
|
|
function yourls_kses_normalize_entities2($matches) { |
|
623
|
|
|
if ( empty($matches[1]) ) |
|
624
|
|
|
return ''; |
|
625
|
|
|
|
|
626
|
|
|
$i = $matches[1]; |
|
627
|
|
|
if (yourls_valid_unicode($i)) { |
|
628
|
|
|
$i = str_pad(ltrim($i,'0'), 3, '0', STR_PAD_LEFT); |
|
629
|
|
|
$i = "&#$i;"; |
|
|
|
|
|
|
630
|
|
|
} else { |
|
631
|
|
|
$i = "&#$i;"; |
|
|
|
|
|
|
632
|
|
|
} |
|
633
|
|
|
|
|
634
|
|
|
return $i; |
|
635
|
|
|
} |
|
636
|
|
|
|
|
637
|
|
|
/** |
|
638
|
|
|
* Callback for yourls_kses_normalize_entities() for regular expression. |
|
639
|
|
|
* |
|
640
|
|
|
* This function helps yourls_kses_normalize_entities() to only accept valid Unicode |
|
641
|
|
|
* numeric entities in hex form. |
|
642
|
|
|
* |
|
643
|
|
|
* @access private |
|
644
|
|
|
* @since 1.6 |
|
645
|
|
|
* |
|
646
|
|
|
* @param array $matches preg_replace_callback() matches array |
|
647
|
|
|
* @return string Correctly encoded entity |
|
648
|
|
|
*/ |
|
649
|
|
|
function yourls_kses_normalize_entities3($matches) { |
|
650
|
1 |
|
if ( empty($matches[1]) ) |
|
651
|
|
|
return ''; |
|
652
|
|
|
|
|
653
|
1 |
|
$hexchars = $matches[1]; |
|
654
|
1 |
|
return ( ( ! yourls_valid_unicode(hexdec($hexchars)) ) ? "&#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';' ); |
|
|
|
|
|
|
655
|
|
|
} |
|
656
|
|
|
|
|
657
|
|
|
/** |
|
658
|
|
|
* Helper function to add global attributes to a tag in the allowed html list. |
|
659
|
|
|
* |
|
660
|
|
|
* @since 1.6 |
|
661
|
|
|
* @access private |
|
662
|
|
|
* |
|
663
|
|
|
* @param array $value An array of attributes. |
|
664
|
|
|
* @return array The array of attributes with global attributes added. |
|
665
|
|
|
*/ |
|
666
|
|
|
function _yourls_add_global_attributes( $value ) { |
|
667
|
|
|
$global_attributes = array( |
|
668
|
|
|
'class' => true, |
|
669
|
|
|
'id' => true, |
|
|
|
|
|
|
670
|
|
|
'style' => true, |
|
671
|
|
|
'title' => true, |
|
672
|
|
|
); |
|
|
|
|
|
|
673
|
|
|
|
|
674
|
|
|
if ( true === $value ) |
|
|
|
|
|
|
675
|
|
|
$value = array(); |
|
676
|
|
|
|
|
677
|
|
|
if ( is_array( $value ) ) |
|
|
|
|
|
|
678
|
|
|
return array_merge( $value, $global_attributes ); |
|
679
|
|
|
|
|
680
|
|
|
return $value; |
|
681
|
|
|
} |
|
682
|
|
|
|
|
683
|
|
|
/** |
|
684
|
|
|
* Helper function to determine if a Unicode value is valid. |
|
685
|
|
|
* |
|
686
|
|
|
* @since 1.6 |
|
687
|
|
|
* |
|
688
|
|
|
* @param int $i Unicode value |
|
689
|
|
|
* @return bool True if the value was a valid Unicode number |
|
690
|
|
|
*/ |
|
691
|
|
|
function yourls_valid_unicode($i) { |
|
692
|
1 |
|
return ( $i == 0x9 || $i == 0xa || $i == 0xd || |
|
693
|
1 |
|
($i >= 0x20 && $i <= 0xd7ff) || |
|
694
|
|
|
($i >= 0xe000 && $i <= 0xfffd) || |
|
695
|
1 |
|
($i >= 0x10000 && $i <= 0x10ffff) ); |
|
696
|
|
|
} |
|
697
|
|
|
|
|
698
|
|
|
/** |
|
699
|
|
|
* Goes through an array and changes the keys to all lower case. |
|
700
|
|
|
* |
|
701
|
|
|
* @since 1.6 |
|
702
|
|
|
* |
|
703
|
|
|
* @param array $inarray Unfiltered array |
|
704
|
|
|
* @return array Fixed array with all lowercase keys |
|
705
|
|
|
*/ |
|
706
|
|
|
function yourls_kses_array_lc($inarray) { |
|
707
|
|
|
$outarray = array (); |
|
|
|
|
|
|
708
|
|
|
|
|
709
|
|
|
foreach ( (array) $inarray as $inkey => $inval) { |
|
710
|
|
|
$outkey = strtolower($inkey); |
|
711
|
|
|
$outarray[$outkey] = array (); |
|
|
|
|
|
|
712
|
|
|
|
|
713
|
|
|
foreach ( (array) $inval as $inkey2 => $inval2) { |
|
714
|
|
|
$outkey2 = strtolower($inkey2); |
|
715
|
|
|
$outarray[$outkey][$outkey2] = $inval2; |
|
716
|
|
|
} # foreach $inval |
|
717
|
|
|
} # foreach $inarray |
|
718
|
|
|
|
|
719
|
|
|
return $outarray; |
|
720
|
|
|
} |
|
721
|
|
|
|
|
722
|
|
|
/** |
|
723
|
|
|
* Convert all entities to their character counterparts. |
|
724
|
|
|
* |
|
725
|
|
|
* This function decodes numeric HTML entities (A and A). It doesn't do |
|
726
|
|
|
* anything with other entities like ä, but we don't need them in the URL |
|
727
|
|
|
* protocol whitelisting system anyway. |
|
728
|
|
|
* |
|
729
|
|
|
* @since 1.6 |
|
730
|
|
|
* |
|
731
|
|
|
* @param string $string Content to change entities |
|
732
|
|
|
* @return string Content after decoded entities |
|
733
|
|
|
*/ |
|
734
|
|
|
function yourls_kses_decode_entities($string) { |
|
735
|
|
|
$string = preg_replace_callback('/&#([0-9]+);/', '_yourls_kses_decode_entities_chr', $string); |
|
736
|
|
|
$string = preg_replace_callback('/&#[Xx]([0-9A-Fa-f]+);/', '_yourls_kses_decode_entities_chr_hexdec', $string); |
|
|
|
|
|
|
737
|
|
|
|
|
738
|
|
|
return $string; |
|
739
|
|
|
} |
|
740
|
|
|
|
|
741
|
|
|
/** |
|
742
|
|
|
* Regex callback for yourls_kses_decode_entities() |
|
743
|
|
|
* |
|
744
|
|
|
* @since 1.6 |
|
745
|
|
|
* |
|
746
|
|
|
* @param array $match preg match |
|
747
|
|
|
* @return string |
|
748
|
|
|
*/ |
|
749
|
|
|
function _yourls_kses_decode_entities_chr( $match ) { |
|
750
|
|
|
return chr( $match[1] ); |
|
751
|
|
|
} |
|
752
|
|
|
|
|
753
|
|
|
/** |
|
754
|
|
|
* Regex callback for yourls_kses_decode_entities() |
|
755
|
|
|
* |
|
756
|
|
|
* @since 1.6 |
|
757
|
|
|
* |
|
758
|
|
|
* @param array $match preg match |
|
759
|
|
|
* @return string |
|
760
|
|
|
*/ |
|
761
|
|
|
function _yourls_kses_decode_entities_chr_hexdec( $match ) { |
|
762
|
|
|
return chr( hexdec( $match[1] ) ); |
|
|
|
|
|
|
763
|
|
|
} |
|
764
|
|
|
|
|
765
|
|
|
/** |
|
766
|
|
|
* Removes any null characters in $string. |
|
767
|
|
|
* |
|
768
|
|
|
* @since 1.6 |
|
769
|
|
|
* |
|
770
|
|
|
* @param string $string |
|
771
|
|
|
* @return string |
|
772
|
|
|
*/ |
|
773
|
|
|
function yourls_kses_no_null($string) { |
|
774
|
|
|
$string = preg_replace( '/\0+/', '', $string ); |
|
775
|
|
|
$string = preg_replace( '/(\\\\0)+/', '', $string ); |
|
776
|
|
|
|
|
777
|
|
|
return $string; |
|
778
|
|
|
} |
|
779
|
|
|
|
YOURLS /
YOURLS
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