diff options
| author | marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2009-04-17 15:41:16 +0000 |
|---|---|---|
| committer | marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2009-04-17 15:41:16 +0000 |
| commit | 07155a084db111c0586ce7ed958c87eed6116704 (patch) | |
| tree | e5e64cd58d20bdb2a0ad896403d8814f11018f52 /mod/kses | |
| parent | 566de88eb3a15b58600f5195dc7b185b8aae0d41 (diff) | |
| download | elgg-07155a084db111c0586ce7ed958c87eed6116704.tar.gz elgg-07155a084db111c0586ce7ed958c87eed6116704.tar.bz2 | |
Closes #833: Kses now built as module
git-svn-id: https://code.elgg.org/elgg/trunk@3222 36083f99-b078-4883-b0ff-0f9b5a30f544
Diffstat (limited to 'mod/kses')
| -rw-r--r-- | mod/kses/start.php | 304 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/AUTHORS | 26 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/COPYING | 340 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/ChangeLog | 168 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/README | 206 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/TODO | 40 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/docs/attribute-value-checks | 68 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/docs/hooks | 7 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/docs/stripping-everything | 7 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/docs/supported-formats | 6 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/docs/whitelisted-url-protocols | 15 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/examples/filter.php | 138 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/examples/test.php | 224 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/kses.php | 555 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/oop/oop.kses.changelog.txt | 204 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/oop/oop.simple.api.txt | 58 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/oop/php4.class.kses.php | 1162 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/oop/php5.class.kses.php | 1172 | ||||
| -rw-r--r-- | mod/kses/vendors/kses/oop/test.oop.kses.php | 507 |
19 files changed, 5207 insertions, 0 deletions
diff --git a/mod/kses/start.php b/mod/kses/start.php new file mode 100644 index 000000000..ed8a12e57 --- /dev/null +++ b/mod/kses/start.php @@ -0,0 +1,304 @@ +<?php + /** + * Elgg kses tag filtering. + * + * @package ElggKses + * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2 + * @author Curverider Ltd + * @copyright Curverider Ltd 2008-2009 + * @link http://elgg.com/ + */ + + /** + * Initialise kses + * + */ + function kses_init() + { + /** For now declare allowed tags and protocols here, TODO: Make this configurable */ + global $CONFIG; + $CONFIG->kses_allowedtags = array( + 'address' => array(), + 'a' => array( + 'class' => array (), + 'href' => array (), + 'id' => array (), + 'title' => array (), + 'rel' => array (), + 'rev' => array (), + 'name' => array (), + 'target' => array()), + 'abbr' => array( + 'class' => array (), + 'title' => array ()), + 'acronym' => array( + 'title' => array ()), + 'b' => array(), + 'big' => array(), + 'blockquote' => array( + 'id' => array (), + 'cite' => array (), + 'class' => array(), + 'lang' => array(), + 'xml:lang' => array()), + 'br' => array ( + 'class' => array ()), + 'button' => array( + 'disabled' => array (), + 'name' => array (), + 'type' => array (), + 'value' => array ()), + 'caption' => array( + 'align' => array (), + 'class' => array ()), + 'cite' => array ( + 'class' => array(), + 'dir' => array(), + 'lang' => array(), + 'title' => array ()), + 'code' => array (), +// 'style' => array()), +// 'col' => array( +// 'align' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'span' => array (), +// 'dir' => array(), +// 'style' => array (), +// 'valign' => array (), +// 'width' => array ()), + 'del' => array( + 'datetime' => array ()), + 'dd' => array(), + 'div' => array( + 'align' => array (), + 'class' => array (), + 'dir' => array (), + 'lang' => array(), +// 'style' => array (), + 'xml:lang' => array()), + 'dl' => array(), + 'dt' => array(), + 'em' => array(), +// 'fieldset' => array(), + 'font' => array( + 'color' => array (), + 'face' => array (), + 'size' => array ()), +// 'form' => array( +// 'action' => array (), +// 'accept' => array (), +// 'accept-charset' => array (), +// 'enctype' => array (), +// 'method' => array (), +// 'name' => array (), +// 'target' => array ()), + 'h1' => array( + 'align' => array (), + 'class' => array ()), + 'h2' => array( + 'align' => array (), + 'class' => array ()), + 'h3' => array( + 'align' => array (), + 'class' => array ()), + 'h4' => array( + 'align' => array (), + 'class' => array ()), + 'h5' => array( + 'align' => array (), + 'class' => array ()), + 'h6' => array( + 'align' => array (), + 'class' => array ()), + 'hr' => array( + 'align' => array (), + 'class' => array (), + 'noshade' => array (), + 'size' => array (), + 'width' => array ()), + 'i' => array(), + 'img' => array( + 'alt' => array (), + 'align' => array (), + 'border' => array (), + 'class' => array (), + 'height' => array (), + 'hspace' => array (), + 'longdesc' => array (), + 'vspace' => array (), + 'src' => array (), +// 'style' => array (), + 'width' => array ()), + 'ins' => array( + 'datetime' => array (), + 'cite' => array ()), + 'kbd' => array(), + 'label' => array( + 'for' => array ()), + 'legend' => array( + 'align' => array ()), + 'li' => array ( + 'align' => array (), + 'class' => array ()), + 'p' => array( + 'class' => array (), + 'align' => array (), + 'dir' => array(), + 'lang' => array(), +// 'style' => array (), + 'xml:lang' => array()), + 'pre' => array( +// 'style' => array(), + 'width' => array ()), + 'q' => array( + 'cite' => array ()), + 's' => array(), + 'span' => array ( + 'class' => array (), + 'dir' => array (), + 'align' => array (), + 'lang' => array (), +// 'style' => array (), + 'title' => array (), + 'xml:lang' => array()), + 'strike' => array(), + 'strong' => array(), + 'sub' => array(), + 'sup' => array(), +// 'table' => array( +// 'align' => array (), +// 'bgcolor' => array (), +// 'border' => array (), +// 'cellpadding' => array (), +// 'cellspacing' => array (), +// 'class' => array (), +// 'dir' => array(), +// 'id' => array(), +// 'rules' => array (), +// 'style' => array (), +// 'summary' => array (), +// 'width' => array ()), +// 'tbody' => array( +// 'align' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'valign' => array ()), +// 'td' => array( +// 'abbr' => array (), +// 'align' => array (), +// 'axis' => array (), +// 'bgcolor' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'class' => array (), +// 'colspan' => array (), +// 'dir' => array(), +// 'headers' => array (), +// 'height' => array (), +// 'nowrap' => array (), +// 'rowspan' => array (), +// 'scope' => array (), +// 'style' => array (), +// 'valign' => array (), +// 'width' => array ()), +// 'textarea' => array( +// 'cols' => array (), +// 'rows' => array (), +// 'disabled' => array (), +// 'name' => array (), +// 'readonly' => array ()), +// 'tfoot' => array( +// 'align' => array (), +// 'char' => array (), +// 'class' => array (), +// 'charoff' => array (), +// 'valign' => array ()), +// 'th' => array( +// 'abbr' => array (), +// 'align' => array (), +// 'axis' => array (), +// 'bgcolor' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'class' => array (), +// 'colspan' => array (), +// 'headers' => array (), +// 'height' => array (), +// 'nowrap' => array (), +// 'rowspan' => array (), +// 'scope' => array (), +// 'valign' => array (), +// 'width' => array ()), +// 'thead' => array( +// 'align' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'class' => array (), +// 'valign' => array ()), + 'title' => array(), +// 'tr' => array( +// 'align' => array (), +// 'bgcolor' => array (), +// 'char' => array (), +// 'charoff' => array (), +// 'class' => array (), +// 'style' => array (), +// 'valign' => array ()), + 'tt' => array(), + 'u' => array(), + 'ul' => array ( + 'class' => array (), +// 'style' => array (), + 'type' => array ()), + 'ol' => array ( + 'class' => array (), + 'start' => array (), +// 'style' => array (), + 'type' => array ()), + 'var' => array ()); + + $CONFIG->kses_allowedprotocols = array('http', 'https', 'ftp', 'news', 'mailto', 'rtsp', 'teamspeak', 'gopher', 'mms', + 'color', 'callto', 'cursor', 'text-align', 'font-size', 'font-weight', 'font-style', + 'border', 'margin', 'padding', 'float'); + + register_plugin_hook('validate', 'input', 'kses_filter_tags', 1); + } + + /** + * Kses filtering of tags, called on a plugin hook + * + * @param mixed $var Variable to filter + * @return mixed + */ + function kses_filter_tags($hook, $entity_type, $returnvalue, $params) + { + $return = $returnvalue; + $var = $returnvalue; + + if (@include_once(dirname(__FILE__) . "/vendors/kses/kses.php")) { + + global $CONFIG; + + $allowedtags = $CONFIG->kses_allowedtags; + $allowedprotocols = $CONFIG->kses_allowedprotocols; + + if (!is_array($var)) { + $return = ""; + $return = kses($var, $allowedtags, $allowedprotocols); + } else { + $return = array(); + + foreach($var as $key => $el) { + $return[$key] = kses($el, $allowedtags, $allowedprotocols); + } + } + } + + return $return; + } + + + register_elgg_event_handler('init','system','kses_init'); + +?>
\ No newline at end of file diff --git a/mod/kses/vendors/kses/AUTHORS b/mod/kses/vendors/kses/AUTHORS new file mode 100644 index 000000000..2e034090f --- /dev/null +++ b/mod/kses/vendors/kses/AUTHORS @@ -0,0 +1,26 @@ +kses AUTHORS +============ + +* Ulf Harnhammar (main coder, project leader) + metaur at users dot sourceforge dot net + http://www.advogato.org/person/metaur/ + +* Richard R. Vásquez, Jr. (coder of object-oriented kses) + contact him at http://chaos.org/contact/ + + +THANKS TO +========= + +* Peter Valach (code review and feature suggestions) +* Simon Cornelius P. Umacob (testing) +* unitedhacker2000@yahoo.com (bug report) +* Dirk Haun (feature suggestion) +* Hendy Irawan (bug report and documentation suggestion) +* dude21 (feature suggestion) +* Christian Bolstad (documentation suggestion) +* SourceForge (project hosting) + +Thanks also go to a lot of people who posted to the Bugtraq and +Webappsec mailing lists about XSS or HTML filters. They gave us some +valuable insights. diff --git a/mod/kses/vendors/kses/COPYING b/mod/kses/vendors/kses/COPYING new file mode 100644 index 000000000..d60c31a97 --- /dev/null +++ b/mod/kses/vendors/kses/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. 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Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/mod/kses/vendors/kses/ChangeLog b/mod/kses/vendors/kses/ChangeLog new file mode 100644 index 000000000..7102396ce --- /dev/null +++ b/mod/kses/vendors/kses/ChangeLog @@ -0,0 +1,168 @@ +kses ChangeLog +============== + +* 0.2.2 and 0.2.2-rc1 + +0.2.2 was released on the 7th of February 2005. We also had a release +candidate, 0.2.2-rc1, that was released on the 30th of January 2005. + +I (Ulf) am sorry for this long delay, but I lost interest in kses for a +while and worked on auditing C/C++ code for buffer overflows and format +string bugs in the Debian Security Audit Project instead +( http://www.debian.org/security/audit/ ). + +This version has the following changes: + +- Richard contributed an additional object-oriented kses version for + PHP 5, which takes advantage of that PHP version's improved object + orientation. You can find it in the oop/ directory. + +- Richard added RemoveProtocol(), RemoveProtocols() and SetProtocols() + methods to both object-oriented kses versions. This closes SourceForge + bug #892477. + +- Richard also did other smaller changes to the object-oriented kses + versions. See oop/oop.kses.changelog.txt for the gory details. + +- The code that checks whether used elements and attributes are allowed + now uses isset() to avoid notices under certain configurations. This + hopefully closes SourceForge bug #918493. + +- The check for the Opera extra whitespace character #173 was moved so + it only affects attribute values and nothing else. This is helpful for + Asian kses users, who use that character in writing. (This is just a + temporary solution. A better one will show up in the next version, when + the parser is rewritten.) This closes SourceForge bug #834645, kind of. + +- Now the program will not even look at attributes and closing XHTML + slashes for closing HTML elements. This will make kses execute faster + and it won't accept atrocities like </br /> anymore. + +- Moved references in examples/test.php from function calls to the function + definition, making it better PHP. + +- The output of examples/test.php and examples/filter.php now conform fully + to W3C's HTML specification. + +- From now on, kses releases will be distributed both as .tar.gz and .zip + archives to please our Wintendo users. This closes SourceForge feature + request #900380. + +- Changed to new copyright year and paper mail address. + + +* 0.2.1 + +0.2.1 was released on the 29th of September 2003. +It has the following changes: + + +- There is now an additional version of kses, using the object-oriented + paradigm. Thanks a lot to Richard R. Vasquez, Jr., who created it! Anyone + who wants to make functional programming, logical programming or spaghetti + programming versions of kses as well (or any other programming paradigm that + you like), go ahead! All the people who like old procedural programming for + web applications shouldn't despair, though, as both versions will be + maintained with each release. + +- kses now has some new attribute value checks: minlen, minval and valueless. + See docs/attribute-value-checks for an explanation. + +- For some reason, the Opera developers decided to make chr(173) a whitespace + character in URL protocols, both when it occurs raw and in an entity. kses + now handles this. + +- The URL protocol whitelisting system now decodes entities before removing + NULLs and whitespaces. + + +* 0.2.0 + +0.2.0 was released on the 25th of July 2003. +It has the following changes: + + +- kses now supports checking of attribute values, and not just element names + and attribute names. The attribute value checks that exist so far are + 'maxlen' (checks how long attribute values are, to avoid Buffer Overflows) + and 'maxval' (checks how big an integer value is, to avoid Denial of Service + attacks). + + Buffer Overflows could both be a problem for WWW clients and different + servers on the Internet that an HTML document links to. One example is + <frame src="ftp://ftp.v1ct1m.com/AAAAAA..thousands_of_A's...">. + + Denial of Service attacks can take the form of too big sizes of iframes or + other things. One example is <iframe src="http://some.web.server/" + width="20000" height="2000">, which makes some client machines completely + overloaded. + +- kses' old feature of removing "javascript:" from attribute values has been + improved. It now has a whole system for white listing of URL protocols, so + you can specify that it's acceptable with http:, https:, ftp: and gopher:, + but no other protocols in attribute values. The system tries pretty hard to + do the right thing with whitespace, upper/lower case, HTML entities + ("javascript:") and repeated entries ("javascript:javascript:alert(57)"). + +- kses now supports both HTML and XHTML code, by allowing " /" at the end of + tags. + +- kses now removes Netscape 4's JavaScript entities, having the form + "&{alert(57)};". They don't even seem to work on all versions of Netscape 4, + but for completeness' sake it seemed like a good feature to add. + +- A bug with NULLs in javascript: URLs was fixed. + (Reported by Simon Cornelius P. Umacob - thanks!) + +- As a nice side effect of the white listing of URL protocols, kses now also + normalizes all HTML entities in documents. It will change HTML code with bad + entities to the right form, for example "AT&T" will be converted to + "AT&T" and "<a href='lyrics.php?band=ladytron&lyrics=playgirl'>" will be + converted to "<a href='lyrics.php?band=ladytron&lyrics=playgirl'>". + ":" will be converted to ":", "&#XYZZY;" will be converted to + "&#XYZZY;", "ä!;" will be converted to "&auml!;" and so on. + + As shown above, it will process HTML entities that it doesn't understand. + It will also deal with too big numbers in numeric HTML entities, which is + helpful as many browsers seem to wrap them around at 2 ** 32, so the + characters 58, 58 + (2 ** 32), 58 + (2 ** 64) etcetera are all colons to the + web browser. + +- You can now use upper case letters in your $allowed_html array, in element + names, attribute names and attribute value check names. Version 0.1.0 + required everything in that array to be in lower case, but that's not + necessary any more. You can also use upper case letters in + $allowed_protocols. + +- The "Really malformed thing" bug from the TODO file was fixed. + It used to convert this string: + x > 5 <a href="blah"> + to: + x > 5 <a href="blah"> + and now it converts it to: + x > 5 <a href="blah"> + +- The "Weird malformed thing" bug from the TODO file was fixed. + It used to convert this string: + <a href="5 href=6> + to: + <a href="6"> + because of the way kses restarts after a parse error in kses_hair(). Now it + converts it to: + <a> + +- A problem with slashes in HTML tags was fixed. + +- examples/filter.php used to use $SCRIPT_NAME, which doesn't work on + Windows. + (Reported by Simon Cornelius P. Umacob - thanks!) + +- kses now allows dashes in attribute names, for things like + <meta http-equiv=..>. + + +* 0.1.0, first public version + +0.1.0 was released on the 9th of June 2003. +It was announced on three security related mailing lists on Friday the 13th +of June (nothing bad happened to it though). diff --git a/mod/kses/vendors/kses/README b/mod/kses/vendors/kses/README new file mode 100644 index 000000000..192524c9f --- /dev/null +++ b/mod/kses/vendors/kses/README @@ -0,0 +1,206 @@ +kses 0.2.2 README [kses strips evil scripts!] +================= + + +* INTRODUCTION * + + +Welcome to kses - an HTML/XHTML filter written in PHP. It removes all unwanted +HTML elements and attributes, no matter how malformed HTML input you give it. +It also does several checks on attribute values. kses can be used to avoid +Cross-Site Scripting (XSS), Buffer Overflows and Denial of Service attacks, +among other things. + +The program is released under the terms of the GNU General Public License. You +should look into what that means, before using kses in your programs. You can +find the full text of the license in the file COPYING. + + +* FEATURES * + + +Some of kses' current features are: + +* It will only allow the HTML elements and attributes that it was explicitly +told to allow. + +* Element and attribute names are case-insensitive (a href vs A HREF). + +* It will understand and process whitespace correctly. + +* Attribute values can be surrounded with quotes, apostrophes or nothing. + +* It will accept valueless attributes with just names and no values (selected). + +* It will accept XHTML's closing " /" marks. + +* Attribute values that are surrounded with nothing will get quotes to avoid +producing non-W3C conforming HTML +(<a href=http://sourceforge.net/projects/kses> works but isn't valid HTML). + +* It handles lots of types of malformed HTML, by interpreting the existing +code the best it can and then rebuilding new code from it. That's a better +approach than trying to process existing code, as you're bound to forget about +some weird special case somewhere. It handles problems like never-ending +quotes and tags gracefully. + +* It will remove additional "<" and ">" characters that people may try to +sneak in somewhere. + +* It supports checking attribute values for minimum/maximum length and +minimum/maximum value, to protect against Buffer Overflows and Denial of +Service attacks against WWW clients and various servers. You can stop +<iframe src= width= height=> from having too high values for width and height, +for instance. + +* It has got a system for whitelisting URL protocols. You can say that +attribute values may only start with http:, https:, ftp: and gopher:, but no +other URL protocols (javascript:, java:, about:, telnet:..). The functions that +do this work handle whitespace, upper/lower case, HTML entities +("javascript:") and repeated entries ("javascript:javascript:alert(57)"). +It also normalizes HTML entities as a nice side effect. + +* It removes Netscape 4's JavaScript entities ("&{alert(57)};"). + +* It handles NULL bytes and Opera's chr(173) whitespace characters. + +* There is a procedural version and two object-oriented versions (for PHP 4 + and PHP 5) of kses. + + +* USE IT * + + +It's very easy to use kses in your own PHP web application! Basic usage looks +like this: + + +<?php + +include 'kses.php'; + +$allowed = array('b' => array(), + 'i' => array(), + 'a' => array('href' => 1, 'title' => 1), + 'p' => array('align' => 1), + 'br' => array()); + +$val = $_POST['val']; +if (get_magic_quotes_gpc()) + $val = stripslashes($val); +# You must strip slashes from magic quotes, or kses will get confused. + +$val = kses($val, $allowed); # The filtering takes place here. + +# Do something with $val. + +?> + + +This definition of $allowed means that only the elements B, I, A, P and BR are +allowed (along with their closing tags /B, /I, /A, /P and /BR). B, I and BR +may not have any attributes. A may only have the attributes HREF and TITLE, +while P may only have the attribute ALIGN. You can list the elements and +attributes in the array in any mixture of upper and lower case. kses will also +recognize HTML code that uses both lower and upper case. + +It's important to select the right allowed attributes, so you won't open up +an XSS hole by mistake. Some important attributes that you mustn't allow +include but are not limited to: 1) style, and 2) all intrinsic events +attributes (onMouseOver and so on, on* really). I'll write more about this in +the documentation that will be distributed with future versions of kses. + +It's also important to note that kses' HTML input must be cleaned of all +slashes coming from magic quotes. If the rest of your code requires these +slashes to be present, you can always add them again after calling kses with +a simple addslashes() call. + +You should take a look at the documentation in the docs/ directory and the +examples in the examples/ directory, to get more information on how to use +kses. The object-oriented versions of kses are also worth checking out, and +they're included in the oop/ directory. + + +* UPGRADING TO 0.2.2 * + + +kses 0.2.2 is backwards compatible with all previous releases, so upgrading +should just be a matter of using a new version of kses.php instead of an old +one. + + +* NEW VERSIONS, MAILING LISTS AND BUG REPORTS * + + +If you want to download new versions, subscribe to the kses-general mailing +list or even take part in the development of kses, we refer you to its +homepage at http://sourceforge.net/projects/kses . New developers and beta +testers are more than welcome! + +If you have any bug reports, suggestions for improvement or simply want to tell +us that you use kses for some project, feel free to post to the kses-general +mailing list. If you have found any security problems (particularly XSS, +naturally) in kses, please contact Ulf privately at metaur at users dot +sourceforge dot net so he can correct it before you or someone else tells the +public about it. + +(No, it's not a security problem in kses if some program that uses it allows a +bad attribute, silly. If kses is told to accept the element body with the +attributes style and onLoad, it will accept them, even if that's a really bad +idea, securitywise.) + + +* OTHER HTML FILTERS * + + +Here are the other stand-alone, open source HTML filters that we currently know +of: + +* Htmlfilter for PHP - the filter from Squirrelmail + PHP + Konstantin Riabitsev + http://linux.duke.edu/projects/mini/htmlfilter/ + +* HTML::StripScripts and related CPAN modules + Perl + Nick Cleaton + http://search.cpan.org/perldoc?HTML%3A%3AStripScripts + +* SafeHtmlChecker [is this really open source?] + PHP + Simon Willison + http://simon.incutio.com/archive/2003/02/23/safeHtmlChecker + +There are also a lot of HTML filters that were written specifically for some +program. Some of them are better than others. + +Please write to the kses-general mailing list if you know of any other +stand-alone, open-source filters. + + +* DEDICATION * + + +kses 0.2.2 is dedicated to Audrey Tautou and Jean-Pierre Jeunet. + + +* MISC * + + +The kses code is based on an HTML filter that Ulf wrote on his own back in 2002 +for the open-source project Gnuheter ( http://savannah.nongnu.org/projects/ +gnuheter ). Gnuheter is a fork from PHP-Nuke. The HTML filter has been +improved a lot since then. + +To stop people from having sleepless nights, we feel the urgent need to state +that kses doesn't have anything to do with the KDE project, despite having a +name that starts with a K. + +In case someone was wondering, Ulf is available for kses-related consulting. + +Finally, the name kses comes from the terms XSS and access. It's also a +recursive acronym (every open-source project should have one!) for "kses +strips evil scripts". + + +// Ulf and the kses development group, February 2005 diff --git a/mod/kses/vendors/kses/TODO b/mod/kses/vendors/kses/TODO new file mode 100644 index 000000000..93652d46a --- /dev/null +++ b/mod/kses/vendors/kses/TODO @@ -0,0 +1,40 @@ +kses TODO +========= + +* create a nice homepage with interactive kses testing + +* remove stuff in between <script>..</script> and <style>..</style> + +* better fix for chr(173) bug and try to allow for "style:" where people + want to use it + +* XHTML tags of the style <br/> instead of <br /> + This is related to a small bug with <a href="blah /> + Solution: rewrite parser. + +(* rewrite document to XHTML or HTML) + +* more attribute value checks + +* more types of hooks + +* return array of removed elements and attributes + +* give the option of turning unacceptable elements to entities instead of + removing them (and turn unacceptable attributes to their own tag, which is + then turned to entities?) .. perhaps turn to comments as well? + +* ">" in HTML tags + <img src="blah.gif" alt="x > 5"> + Not very important, but.. + +(* make document well-formed.. there is HTML Tidy, but perhaps we want this + functionality in kses itself?) + +* port to other programming languages to achieve world domination + +* lots of testing + +* write better documentation + +* feedback from users diff --git a/mod/kses/vendors/kses/docs/attribute-value-checks b/mod/kses/vendors/kses/docs/attribute-value-checks new file mode 100644 index 000000000..8b0d645ee --- /dev/null +++ b/mod/kses/vendors/kses/docs/attribute-value-checks @@ -0,0 +1,68 @@ +kses attribute value checks +=========================== + +As you've probably already read in the README file, an $allowed_html array +normally looks like this: + +$allowed = array('b' => array(), + 'i' => array(), + 'a' => array('href' => 1, + 'title' => 1), + 'p' => array('align' => 1), + 'br' => array()); + +This sets what elements and attributes are allowed. + +From kses 0.2.0, you can also perform some checks on the attribute values. You +do it like this: + +$allowed = array('b' => array(), + 'i' => array(), + 'a' => array('href' => + array('maxlen' => 100), + 'title' => 1), + 'p' => array('align' => 1), + 'font' => array('size' => + array('maxval' => 20)), + 'br' => array()); + +This means that kses should perform the maxlen check with the value 100 on the +<a href=> value, as well as the maxval check with the value 20 on the <font +size=> value. + +The currently implemented checks (with more to come) are 'maxlen', 'maxval', +'minlen', 'minval' and 'valueless'. + +'maxlen' checks that the length of the attribute value is not greater than the +given value. It is helpful against Buffer Overflows in WWW clients and various +servers on the Internet. In my example above, it would mean that +"<a href='ftp://ftp.v1ct1m.com/AAAA..thousands_of_A's...'>" wouldn't be +accepted. + +Of course, this problem is even worse if you put that long URL in a <frame> +tag instead, so the WWW client will fetch it automatically without a user +having to click it. + +'maxval' checks that the attribute value is an integer greater than or equal to +zero, that it doesn't have an unreasonable amount of zeroes or whitespace (to +avoid Buffer Overflows), and that it is not greater than the given value. In +my example above, it would mean that "<font size='20'>" is accepted but +"<font size='21'>" is not. This check helps against Denial of Service attacks +against WWW clients. + +One example of this DoS problem is <iframe src="http://some.web.server/" +width="20000" height="2000">, which makes some client machines completely +overloaded. + +'minlen' and 'minval' works the same as 'maxlen' and 'maxval', except that they +check for minimum lengths and values instead of maximum ones. + +'valueless' checks if an attribute has a value (like <a href="blah">) or not +(<option selected>). If the given value is a "y" or a "Y", the attribute must +not have a value to be accepted. If the given value is an "n" or an "N", the +attribute must have a value. Note that <a href=""> is considered to have a +value, so there's a difference between valueless attributes and attribute +values with the length zero. + +You can combine more than one check, by putting one after the other in the +inner array. diff --git a/mod/kses/vendors/kses/docs/hooks b/mod/kses/vendors/kses/docs/hooks new file mode 100644 index 000000000..971ff1ca4 --- /dev/null +++ b/mod/kses/vendors/kses/docs/hooks @@ -0,0 +1,7 @@ +kses hooks +========== + +Sometimes you want to perform one more action on all data that kses will +filter. There is a special function for that purpose called kses_hook(). kses +calls it from its main function kses(), so if you insert some code in +kses_hook(), it will always be called to change all data that kses sees. diff --git a/mod/kses/vendors/kses/docs/stripping-everything b/mod/kses/vendors/kses/docs/stripping-everything new file mode 100644 index 000000000..f11742b7c --- /dev/null +++ b/mod/kses/vendors/kses/docs/stripping-everything @@ -0,0 +1,7 @@ +kses stripping everything +========================= + +Sometimes you want to use kses for stripping all (X)HTML tags from a document. +You do it by calling kses like this: + +$doc = kses($doc, array()); diff --git a/mod/kses/vendors/kses/docs/supported-formats b/mod/kses/vendors/kses/docs/supported-formats new file mode 100644 index 000000000..c0a9d9740 --- /dev/null +++ b/mod/kses/vendors/kses/docs/supported-formats @@ -0,0 +1,6 @@ +kses supported formats +====================== + +It should be noted that kses doesn't deal with any smiley plus newline plus +HTML format. It uses HTML or XHTML, both as input and as output. +Conversions from the preferred format to or from HTML or XHTML is up to you. diff --git a/mod/kses/vendors/kses/docs/whitelisted-url-protocols b/mod/kses/vendors/kses/docs/whitelisted-url-protocols new file mode 100644 index 000000000..a0032c4cc --- /dev/null +++ b/mod/kses/vendors/kses/docs/whitelisted-url-protocols @@ -0,0 +1,15 @@ +kses whitelisted URL protocols +============================== + +From kses 0.2.0, it has a function that checks all attribute values for URL +protocols and only allows the protocols given in a whitelist. + +If you call kses the old way with two parameters - a string and an +$allowed_html array - it will take its own default array, which whitelists the +protocols http, https, ftp, news, nntp, telnet, gopher and mailto. Pretty +reasonable, but anyone who wants to change it just calls the kses() function +with a third parameter, like this: + +$string = kses($string, $allowed_html, array('http', 'https')); + +Note that you shouldn't include any colon after http or other protocol names. diff --git a/mod/kses/vendors/kses/examples/filter.php b/mod/kses/vendors/kses/examples/filter.php new file mode 100644 index 000000000..9a026795b --- /dev/null +++ b/mod/kses/vendors/kses/examples/filter.php @@ -0,0 +1,138 @@ +<?php + +# filter - simple example script for kses +# Copyright (C) 2003, 2005 Ulf Harnhammar +# +# This program is free software and open source software; you can redistribute +# it and/or modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of the License, +# or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit +# http://www.gnu.org/licenses/gpl.html +# +# *** CONTACT INFORMATION *** +# +# E-mail: metaur at users dot sourceforge dot net +# Web page: http://sourceforge.net/projects/kses +# Paper mail: Ulf Harnhammar +# Ymergatan 17 C +# 753 25 Uppsala +# SWEDEN + +# *** INCLUDE kses, DEFINE ELEMENTS+ATTRIBUTES, STRIP MAGIC QUOTES *** + +include '../kses.php'; + +$allowed = array('b' => array(), + 'i' => array(), + 'a' => array('href' => array('minlen' => 3, 'maxlen' => 50), + 'title' => array('valueless' => 'n')), + 'p' => array('align' => 1, + 'dummy' => array('valueless' => 'y')), + 'img' => array('src' => 1), # FIXME + 'font' => array('size' => + array('minval' => 4, 'maxval' => 20)), + 'br' => array()); + +$val = $_POST['val']; +if (get_magic_quotes_gpc()) + $val = stripslashes($val); + +# *** PRINT SOME HTML CODE *** + +?> +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<head> +<title>kses example: HTML filter</title> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +</head> + +<body> + +<?php + +# *** SHOW THE USER'S INPUT *** + +?> +<h1>Input</h1> + +<pre><?= htmlspecialchars($val); ?></pre> + +<?php + +# *** SHOW IT AFTER FILTERING *** + +?> +<h1>Output</h1> + +<pre><?php + +$val = kses($val, $allowed, array('http', 'https')); +# The filtering takes place on the line above. +echo htmlspecialchars($val); + +?></pre> + +<?php + +# *** DISPLAY A TEXTAREA FOR THE USER TO TYPE IN *** + +?> +<h1>Type something</h1> + +<form method="POST" action="filter.php"> +<textarea name="val" rows=5 cols=50><?= htmlspecialchars($val); ?></textarea> +<br> +<input type="submit" value="Send it!"> +</form> + +<?php + +# *** SHOW ALLOWED ELEMENTS+ATTRIBUTES *** + +?> +<p> +Only the following HTML elements and attributes are allowed: +</p> + +<p> +<?php +$first = 1; +foreach ($allowed as $htmlkey => $htmlval) +{ + if (!$first) + echo ' '; + $first = 0; + + echo "<$htmlkey"; # element + + foreach ($htmlval as $html2key => $html2val) + echo " <i>$html2key=</i>"; # attribute + + echo ">"; +} + +?> + +</p> + +<p> +<a href=> must have a length in the range 3 to 50.<br> +<a title=> must not be valueless.<br> +<p dummy> must be valueless.<br> +<font size=> must have a value in the range 4 to 20.<br> +Only the URL protocols "http" and "https" are allowed. +</p> + +</body> +</html> diff --git a/mod/kses/vendors/kses/examples/test.php b/mod/kses/vendors/kses/examples/test.php new file mode 100644 index 000000000..e0c6695c8 --- /dev/null +++ b/mod/kses/vendors/kses/examples/test.php @@ -0,0 +1,224 @@ +<?php + +# test - checks if a kses installation is working +# Copyright (C) 2003, 2005 Ulf Harnhammar +# +# This program is free software and open source software; you can redistribute +# it and/or modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of the License, +# or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit +# http://www.gnu.org/licenses/gpl.html +# +# *** CONTACT INFORMATION *** +# +# E-mail: metaur at users dot sourceforge dot net +# Web page: http://sourceforge.net/projects/kses +# Paper mail: Ulf Harnhammar +# Ymergatan 17 C +# 753 25 Uppsala +# SWEDEN + +include '../kses.php'; + +?> +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<head> +<title>kses test</title> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +</head> + +<body> +<h1>kses test</h1> +<p> + +<?php + + +# *** FUNCTION DEFINITIONS *** + + +function onetest($htmlbefore, $htmlafter, &$score, &$max, $allowed) +############################################################################### +# This function performs one kses test. +############################################################################### +{ + $max++; + + $htmlkses = kses($htmlbefore, $allowed); +# echo "htmlkses --".htmlspecialchars($htmlkses)."--<br>\n"; + + if ($htmlkses == $htmlafter) + { + echo 'OK'; + $score++; + } + else + echo 'not OK'; + + echo "<br>\n"; +} # function onetest + + +# *** MAIN PROGRAM *** + + +$max = $score = 0; + +# Test #1 + +echo 'Test #1.. '; +$htmlbefore = 'kses \'kses\' kses "kses" kses \\kses\\'; +$htmlafter = $htmlbefore; +onetest($htmlbefore, $htmlafter, $score, $max, array()); + +# Test #2 + +echo 'Test #2.. '; +$htmlbefore = 'kses <br>'; +$htmlafter = 'kses '; +onetest($htmlbefore, $htmlafter, $score, $max, array()); + +# Test #3 + +echo 'Test #3.. '; +$htmlbefore = 'kses < BR >'; +$htmlafter = 'kses <BR>'; +onetest($htmlbefore, $htmlafter, $score, $max, array('br' => array())); + +# Test #4 + +echo 'Test #4.. '; +$htmlbefore = 'kses > 5 <br>'; +$htmlafter = 'kses > 5 <br>'; +onetest($htmlbefore, $htmlafter, $score, $max, array('br' => array())); + +# Test #5 + +echo 'Test #5.. '; +$htmlbefore = 'kses < br'; +$htmlafter = 'kses <br>'; +onetest($htmlbefore, $htmlafter, $score, $max, array('br' => array())); + +# Test #6 + +echo 'Test #6.. '; +$htmlbefore = 'kses <a href=5>'; +$htmlafter = 'kses <a>'; +onetest($htmlbefore, $htmlafter, $score, $max, array('br' => array(), + 'a' => array())); + +# Test #7 + +echo 'Test #7.. '; +$htmlbefore = 'kses <a href=5>'; +$htmlafter = 'kses <a href="5">'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #8 + +echo 'Test #8.. '; +$htmlbefore = 'kses <a href>'; +$htmlafter = $htmlbefore; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #9 + +echo 'Test #9.. '; +$htmlbefore = 'kses <a href href=5 href=\'5\' href="5" dummy>'; +$htmlafter = 'kses <a href href="5" href=\'5\' href="5">'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #10 + +echo 'Test #10.. '; +$htmlbefore = 'kses <a href="kses\\\\kses">'; +$htmlafter = $htmlbefore; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #11 + +echo 'Test #11.. '; +$htmlbefore = 'kses <a href="xxxxxx">'; +$htmlafter = $htmlbefore; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => array('maxlen' => 6)))); + +# Test #12 + +echo 'Test #12.. '; +$htmlbefore = 'kses <a href="xxxxxxx">'; +$htmlafter = 'kses <a>'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => array('maxlen' => 6)))); + +# Test #13 + +echo 'Test #13.. '; +$htmlbefore = 'kses <a href="687">'; +$htmlafter = 'kses <a>'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => array('maxval' => 686)))); + +# Test #14 + +echo 'Test #14.. '; +$htmlbefore = 'kses <a href="xx" / >'; +$htmlafter = 'kses <a href="xx" />'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => array('maxlen' => 6)))); + +# Test #15 + +echo 'Test #15.. '; +$htmlbefore = 'kses <a href="JAVA java scrIpt : SCRIPT : alert(57)">'; +$htmlafter = 'kses <a href="alert(57)">'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #16 + +echo 'Test #16.. '; +$htmlbefore = 'kses <a href="htt  ­­'.chr(173).'P://ulf">'; +$htmlafter = 'kses <a href="http://ulf">'; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + +# Test #17 + +echo 'Test #17.. '; +$htmlbefore = 'kses <a href="/start.php"> kses <a href="start.php">'; +$htmlafter = $htmlbefore; +onetest($htmlbefore, $htmlafter, $score, $max, + array('a' => array('href' => 1))); + + +# finished + +echo "<br>Score $score out of $max\n"; + +if ($score != $max) + echo '<br>Something is wrong! Please contact '. + '<a href="mailto:kses-general@lists.sourceforge.net">'. + 'the kses-general mailing list</a>, and tell us what '. + "operating system and PHP version you use.\n"; + +?> + +</p> +</body> +</html> diff --git a/mod/kses/vendors/kses/kses.php b/mod/kses/vendors/kses/kses.php new file mode 100644 index 000000000..65da29599 --- /dev/null +++ b/mod/kses/vendors/kses/kses.php @@ -0,0 +1,555 @@ +<?php + +# kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes +# Copyright (C) 2002, 2003, 2005 Ulf Harnhammar +# +# This program is free software and open source software; you can redistribute +# it and/or modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of the License, +# or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit +# http://www.gnu.org/licenses/gpl.html +# +# *** CONTACT INFORMATION *** +# +# E-mail: metaur at users dot sourceforge dot net +# Web page: http://sourceforge.net/projects/kses +# Paper mail: Ulf Harnhammar +# Ymergatan 17 C +# 753 25 Uppsala +# SWEDEN +# +# [kses strips evil scripts!] + + +function kses($string, $allowed_html, $allowed_protocols = + array('http', 'https', 'ftp', 'news', 'nntp', 'telnet', + 'gopher', 'mailto')) +############################################################################### +# This function makes sure that only the allowed HTML element names, attribute +# names and attribute values plus only sane HTML entities will occur in +# $string. You have to remove any slashes from PHP's magic quotes before you +# call this function. +############################################################################### +{ + $string = kses_no_null($string); + $string = kses_js_entities($string); + $string = kses_normalize_entities($string); + $string = kses_hook($string); + $allowed_html_fixed = kses_array_lc($allowed_html); + return kses_split($string, $allowed_html_fixed, $allowed_protocols); +} # function kses + + +function kses_hook($string) +############################################################################### +# You add any kses hooks here. +############################################################################### +{ + return $string; +} # function kses_hook + + +function kses_version() +############################################################################### +# This function returns kses' version number. +############################################################################### +{ + return '0.2.2'; +} # function kses_version + + +function kses_split($string, $allowed_html, $allowed_protocols) +############################################################################### +# This function searches for HTML tags, no matter how malformed. It also +# matches stray ">" characters. +############################################################################### +{ + return preg_replace('%(<'. # EITHER: < + '[^>]*'. # things that aren't > + '(>|$)'. # > or end of string + '|>)%e', # OR: just a > + "kses_split2('\\1', \$allowed_html, ". + '$allowed_protocols)', + $string); +} # function kses_split + + +function kses_split2($string, $allowed_html, $allowed_protocols) +############################################################################### +# This function does a lot of work. It rejects some very malformed things +# like <:::>. It returns an empty string, if the element isn't allowed (look +# ma, no strip_tags()!). Otherwise it splits the tag into an element and an +# attribute list. +############################################################################### +{ + $string = kses_stripslashes($string); + + if (substr($string, 0, 1) != '<') + return '>'; + # It matched a ">" character + + if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches)) + return ''; + # It's seriously malformed + + $slash = trim($matches[1]); + $elem = $matches[2]; + $attrlist = $matches[3]; + + if (!@isset($allowed_html[strtolower($elem)])) + return ''; + # They are using a not allowed HTML element + + if ($slash != '') + return "<$slash$elem>"; + # No attributes are allowed for closing elements + + return kses_attr("$slash$elem", $attrlist, $allowed_html, + $allowed_protocols); +} # function kses_split2 + + +function kses_attr($element, $attr, $allowed_html, $allowed_protocols) +############################################################################### +# This function removes all attributes, if none are allowed for this element. +# If some are allowed it calls kses_hair() to split them further, and then it +# builds up new HTML code from the data that kses_hair() returns. It also +# removes "<" and ">" characters, if there are any left. One more thing it +# does is to check if the tag has a closing XHTML slash, and if it does, +# it puts one in the returned code as well. +############################################################################### +{ +# Is there a closing XHTML slash at the end of the attributes? + + $xhtml_slash = ''; + if (preg_match('%\s/\s*$%', $attr)) + $xhtml_slash = ' /'; + +# Are any attributes allowed at all for this element? + + if (@count($allowed_html[strtolower($element)]) == 0) + return "<$element$xhtml_slash>"; + +# Split it + + $attrarr = kses_hair($attr, $allowed_protocols); + +# Go through $attrarr, and save the allowed attributes for this element +# in $attr2 + + $attr2 = ''; + + foreach ($attrarr as $arreach) + { + if (!@isset($allowed_html[strtolower($element)] + [strtolower($arreach['name'])])) + continue; # the attribute is not allowed + + $current = $allowed_html[strtolower($element)] + [strtolower($arreach['name'])]; + + if (!is_array($current)) + $attr2 .= ' '.$arreach['whole']; + # there are no checks + + else + { + # there are some checks + $ok = true; + foreach ($current as $currkey => $currval) + if (!kses_check_attr_val($arreach['value'], $arreach['vless'], + $currkey, $currval)) + { $ok = false; break; } + + if ($ok) + $attr2 .= ' '.$arreach['whole']; # it passed them + } # if !is_array($current) + } # foreach + +# Remove any "<" or ">" characters + + $attr2 = preg_replace('/[<>]/', '', $attr2); + + return "<$element$attr2$xhtml_slash>"; +} # function kses_attr + + +function kses_hair($attr, $allowed_protocols) +############################################################################### +# This function does a lot of work. It parses an attribute list into an array +# with attribute data, and tries to do the right thing even if it gets weird +# input. It will add quotes around attribute values that don't have any quotes +# or apostrophes around them, to make it easier to produce HTML code that will +# conform to W3C's HTML specification. It will also remove bad URL protocols +# from attribute values. +############################################################################### +{ + $attrarr = array(); + $mode = 0; + $attrname = ''; + +# Loop through the whole attribute list + + while (strlen($attr) != 0) + { + $working = 0; # Was the last operation successful? + + switch ($mode) + { + case 0: # attribute name, href for instance + + if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) + { + $attrname = $match[1]; + $working = $mode = 1; + $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr); + } + + break; + + case 1: # equals sign or valueless ("selected") + + if (preg_match('/^\s*=\s*/', $attr)) # equals sign + { + $working = 1; $mode = 2; + $attr = preg_replace('/^\s*=\s*/', '', $attr); + break; + } + + if (preg_match('/^\s+/', $attr)) # valueless + { + $working = 1; $mode = 0; + $attrarr[] = array + ('name' => $attrname, + 'value' => '', + 'whole' => $attrname, + 'vless' => 'y'); + $attr = preg_replace('/^\s+/', '', $attr); + } + + break; + + case 2: # attribute value, a URL after href= for instance + + if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) + # "value" + { + $thisval = kses_bad_protocol($match[1], $allowed_protocols); + + $attrarr[] = array + ('name' => $attrname, + 'value' => $thisval, + 'whole' => "$attrname=\"$thisval\"", + 'vless' => 'n'); + $working = 1; $mode = 0; + $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr); + break; + } + + if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) + # 'value' + { + $thisval = kses_bad_protocol($match[1], $allowed_protocols); + + $attrarr[] = array + ('name' => $attrname, + 'value' => $thisval, + 'whole' => "$attrname='$thisval'", + 'vless' => 'n'); + $working = 1; $mode = 0; + $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr); + break; + } + + if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) + # value + { + $thisval = kses_bad_protocol($match[1], $allowed_protocols); + + $attrarr[] = array + ('name' => $attrname, + 'value' => $thisval, + 'whole' => "$attrname=\"$thisval\"", + 'vless' => 'n'); + # We add quotes to conform to W3C's HTML spec. + $working = 1; $mode = 0; + $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr); + } + + break; + } # switch + + if ($working == 0) # not well formed, remove and try again + { + $attr = kses_html_error($attr); + $mode = 0; + } + } # while + + if ($mode == 1) + # special case, for when the attribute list ends with a valueless + # attribute like "selected" + $attrarr[] = array + ('name' => $attrname, + 'value' => '', + 'whole' => $attrname, + 'vless' => 'y'); + + return $attrarr; +} # function kses_hair + + +function kses_check_attr_val($value, $vless, $checkname, $checkvalue) +############################################################################### +# This function performs different checks for attribute values. The currently +# implemented checks are "maxlen", "minlen", "maxval", "minval" and "valueless" +# with even more checks to come soon. +############################################################################### +{ + $ok = true; + + switch (strtolower($checkname)) + { + case 'maxlen': + # The maxlen check makes sure that the attribute value has a length not + # greater than the given value. This can be used to avoid Buffer Overflows + # in WWW clients and various Internet servers. + + if (strlen($value) > $checkvalue) + $ok = false; + break; + + case 'minlen': + # The minlen check makes sure that the attribute value has a length not + # smaller than the given value. + + if (strlen($value) < $checkvalue) + $ok = false; + break; + + case 'maxval': + # The maxval check does two things: it checks that the attribute value is + # an integer from 0 and up, without an excessive amount of zeroes or + # whitespace (to avoid Buffer Overflows). It also checks that the attribute + # value is not greater than the given value. + # This check can be used to avoid Denial of Service attacks. + + if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value)) + $ok = false; + if ($value > $checkvalue) + $ok = false; + break; + + case 'minval': + # The minval check checks that the attribute value is a positive integer, + # and that it is not smaller than the given value. + + if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value)) + $ok = false; + if ($value < $checkvalue) + $ok = false; + break; + + case 'valueless': + # The valueless check checks if the attribute has a value + # (like <a href="blah">) or not (<option selected>). If the given value + # is a "y" or a "Y", the attribute must not have a value. + # If the given value is an "n" or an "N", the attribute must have one. + + if (strtolower($checkvalue) != $vless) + $ok = false; + break; + } # switch + + return $ok; +} # function kses_check_attr_val + + +function kses_bad_protocol($string, $allowed_protocols) +############################################################################### +# This function removes all non-allowed protocols from the beginning of +# $string. It ignores whitespace and the case of the letters, and it does +# understand HTML entities. It does its work in a while loop, so it won't be +# fooled by a string like "javascript:javascript:alert(57)". +############################################################################### +{ + $string = kses_no_null($string); + $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature" + $string2 = $string.'a'; + + while ($string != $string2) + { + $string2 = $string; + $string = kses_bad_protocol_once($string, $allowed_protocols); + } # while + + return $string; +} # function kses_bad_protocol + + +function kses_no_null($string) +############################################################################### +# This function removes any NULL characters in $string. +############################################################################### +{ + $string = preg_replace('/\0+/', '', $string); + $string = preg_replace('/(\\\\0)+/', '', $string); + + return $string; +} # function kses_no_null + + +function kses_stripslashes($string) +############################################################################### +# This function changes the character sequence \" to just " +# It leaves all other slashes alone. It's really weird, but the quoting from +# preg_replace(//e) seems to require this. +############################################################################### +{ + return preg_replace('%\\\\"%', '"', $string); +} # function kses_stripslashes + + +function kses_array_lc($inarray) +############################################################################### +# This function goes through an array, and changes the keys to all lower case. +############################################################################### +{ + $outarray = array(); +
+ if (sizeof($inarray)) + foreach ($inarray as $inkey => $inval) + { + $outkey = strtolower($inkey); + $outarray[$outkey] = array(); + + foreach ($inval as $inkey2 => $inval2) + { + $outkey2 = strtolower($inkey2); + $outarray[$outkey][$outkey2] = $inval2; + } # foreach $inval + } # foreach $inarray + + return $outarray; +} # function kses_array_lc + + +function kses_js_entities($string) +############################################################################### +# This function removes the HTML JavaScript entities found in early versions of +# Netscape 4. +############################################################################### +{ + return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string); +} # function kses_js_entities + + +function kses_html_error($string) +############################################################################### +# This function deals with parsing errors in kses_hair(). The general plan is +# to remove everything to and including some whitespace, but it deals with +# quotes and apostrophes as well. +############################################################################### +{ + return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string); +} # function kses_html_error + + +function kses_bad_protocol_once($string, $allowed_protocols) +############################################################################### +# This function searches for URL protocols at the beginning of $string, while +# handling whitespace and HTML entities. +############################################################################### +{ + return preg_replace('/^((&[^;]*;|[\sA-Za-z0-9])*)'. + '(:|:|&#[Xx]3[Aa];)\s*/e', + 'kses_bad_protocol_once2("\\1", $allowed_protocols)', + $string); +} # function kses_bad_protocol_once + + +function kses_bad_protocol_once2($string, $allowed_protocols) +############################################################################### +# This function processes URL protocols, checks to see if they're in the white- +# list or not, and returns different data depending on the answer. +############################################################################### +{ + $string2 = kses_decode_entities($string); + $string2 = preg_replace('/\s/', '', $string2); + $string2 = kses_no_null($string2); + $string2 = preg_replace('/\xad+/', '', $string2); + # deals with Opera "feature" + $string2 = strtolower($string2); + + $allowed = false; + foreach ($allowed_protocols as $one_protocol) + if (strtolower($one_protocol) == $string2) + { + $allowed = true; + break; + } + + if ($allowed) + return "$string2:"; + else + return ''; +} # function kses_bad_protocol_once2 + + +function kses_normalize_entities($string) +############################################################################### +# This function normalizes HTML entities. It will convert "AT&T" to the correct +# "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on. +############################################################################### +{ +# Disarm all entities by converting & to & + + // $string = str_replace('&', '&', $string); // [Marcus Povey 20090212: Commented out in ref #561. Needs a better solution. ] + +# Change back the allowed entities in our entity whitelist + + $string = preg_replace('/&([A-Za-z][A-Za-z0-9]{0,19});/', + '&\\1;', $string); + $string = preg_replace('/&#0*([0-9]{1,5});/e', + 'kses_normalize_entities2("\\1")', $string); + $string = preg_replace('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', + '&#\\1\\2;', $string); + + return $string; +} # function kses_normalize_entities + + +function kses_normalize_entities2($i) +############################################################################### +# This function helps kses_normalize_entities() to only accept 16 bit values +# and nothing more for &#number; entities. +############################################################################### +{ + return (($i > 65535) ? "&#$i;" : "&#$i;"); +} # function kses_normalize_entities2 + + +function kses_decode_entities($string) +############################################################################### +# This function decodes numeric HTML entities (A and A). It doesn't +# do anything with other entities like ä, but we don't need them in the +# URL protocol whitelisting system anyway. +############################################################################### +{ + $string = preg_replace('/&#([0-9]+);/e', 'chr("\\1")', $string); + $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', + $string); + + return $string; +} # function kses_decode_entities + +?> diff --git a/mod/kses/vendors/kses/oop/oop.kses.changelog.txt b/mod/kses/vendors/kses/oop/oop.kses.changelog.txt new file mode 100644 index 000000000..a82daf4fe --- /dev/null +++ b/mod/kses/vendors/kses/oop/oop.kses.changelog.txt @@ -0,0 +1,204 @@ +kses ChangeLog
+==============
+
+KSES5
+ * 1.0.2
+KSES4
+ * 0.2.2
+ - Folded in code from kses 0.2.2.
+
+KSES5
+ * 1.0.1rc
+KSES4
+ * 0.2.2rc
+ - Added SetProtocols() to make protocol replacement a single step
+ to fully answer concerns in bug #892477
+
+KSES5
+ * 1.0.0
+ - Turned many methods private
+
+ - Now using __construct default constructor
+
+ - Only runs in PHP5 or better
+
+ - All method names changed to reflect verb status
+
+ - Folded sinlge line functions into calling methods
+
+ - Deprecated _hook(), Protocols()
+
+ - Added AddProtocols() to replace Protocols()
+
+ - Added filterKsesTextHook() to replace _hook()
+
+ - Added RemoveProtocol() and RemoveProtocols() to remove protocols
+ singly, or batch. This should clear bug #892477
+
+ - Version number is 1.0.0
+
+KSES4
+ * 0.2.1
+ - Synced version number to procedural code
+
+ - Deprecated _hook(), Protocols()
+
+ - Added AddProtocols() to replace Protocols()
+
+ - Added filterKsesTextHook() to replace _hook()
+
+ - Added RemoveProtocol() and RemoveProtocols() to remove protocols singly,
+ or batch. This should clear bug #892477
+
+OOP
+ - Forked code into PHP4 and PHP5 versions. Use '$myKses = new kses[45]'
+ from now on.
+
+ - Modified code to run in E_STRICT. This should clear bug #918493
+
+ - Added phpDoc commenting
+
+OOP
+ * 0.0.2
+ - Fixed a bug in AddProtocol that wasn't adding new protocols to
+ $this->allowed_protocols
+
+ - Modified internal methods to correspond to kses 0.2.1 modifications.
+
+ - Created a basic test suite that can be run via web or CLI.
+
+ - Started CVSing the code.
+
+OOP
+ * 0.0.1
+ - Turned all the kses_function_name functions to _function_name methods.
+
+ - Added a couple of properties (allowed_protocols, allowed_html) with
+ $this->allowed_protocols defaulting to the lion's share of usual
+ protocols.
+
+ - Modified the applicable use of preg_replace() functions to point to
+ internal class methods.
+
+ - Reduced the parameter list of some methods since internal properties
+ are now being used.
+
+ - Added "public" methods to set up the allowed protocols and HTML.
+
+Procedural
+ * 0.2.1
+
+ 0.2.1 was released on the 29th of September 2003.
+ It has the following changes:
+
+ - There is now an additional version of kses, using the object-oriented
+ paradigm. Thanks a lot to Richard R. Vasquez, Jr., who created it!
+ Anyone who wants to make functional programming, logical programming or
+ spaghetti programming versions of kses as well (or any other programming
+ paradigm that you like), go ahead! All the people who like old
+ procedural programming for web applications shouldn't despair, though,
+ as both versions will be maintained with each release.
+
+ - kses now has some new attribute value checks: minlen, minval and
+ valueless. See docs/attribute-value-checks for an explanation.
+
+ - For some reason, the Opera developers decided to make chr(173) a
+ whitespace character in URL protocols, both when it occurs raw and in an
+ entity. kses now handles this.
+
+ - The URL protocol whitelisting system now decodes entities before
+ removing NULLs and whitespaces.
+
+Procedural
+ * 0.2.0
+
+ 0.2.0 was released on the 25th of July 2003.
+ It has the following changes:
+
+ - kses now supports checking of attribute values, and not just element
+ names and attribute names. The attribute value checks that exist so far
+ are 'maxlen' (checks how long attribute values are, to avoid Buffer
+ Overflows) and 'maxval' (checks how big an integer value is, to avoid
+ Denial of Service attacks).
+
+ Buffer Overflows could both be a problem for WWW clients and different
+ servers on the Internet that an HTML document links to. One example is
+ <frame src="ftp://ftp.v1ct1m.com/AAAAAA..thousands_of_A's...">.
+
+ Denial of Service attacks can take the form of too big sizes of iframes
+ or other things. One example is <iframe src="http://some.web.server/"
+ width="20000" height="2000">, which makes some client machines
+ completely overloaded.
+
+ - kses' old feature of removing "javascript:" from attribute values has
+ been improved. It now has a whole system for white listing of URL
+ protocols, so you can specify that it's acceptable with http:, https:,
+ ftp: and gopher:, but no other protocols in attribute values. The system
+ tries pretty hard to do the right thing with whitespace, upper/lower
+ case, HTML entities ("javascript:") and repeated entries
+ ("javascript:javascript:alert(57)").
+
+ - kses now supports both HTML and XHTML code, by allowing " /" at the end
+ of tags.
+
+ - kses now removes Netscape 4's JavaScript entities, having the form
+ "&{alert(57)};". They don't even seem to work on all versions of
+ Netscape 4, but for completeness' sake it seemed like a good feature to
+ add.
+
+ - A bug with NULLs in javascript: URLs was fixed.
+ (Reported by Simon Cornelius P. Umacob - thanks!)
+
+ - As a nice side effect of the white listing of URL protocols, kses now
+ also normalizes all HTML entities in documents. It will change HTML code
+ with bad entities to the right form, for example "AT&T" will be
+ converted to "AT&T" and "<a href='lyrics.php?band=ladytron&lyrics=
+ playgirl'>" will be converted to "<a href='lyrics.php?band=
+ ladytron&lyrics=playgirl'>". ":" will be converted to
+ ":", "&#XYZZY;" will be converted to "&#XYZZY;", "ä!;" will
+ be converted to "&auml!;" and so on.
+
+ As shown above, it will process HTML entities that it doesn't
+ understand. It will also deal with too big numbers in numeric HTML
+ entities, which is helpful as many browsers seem to wrap them around at
+ 2 ** 32, so the characters 58, 58 + (2 ** 32), 58 + (2 ** 64) etcetera
+ are all colons to the web browser.
+
+ - You can now use upper case letters in your $allowed_html array, in
+ element names, attribute names and attribute value check names. Version
+ 0.1.0 required everything in that array to be in lower case, but that's
+ not necessary any more. You can also use upper case letters in
+ $allowed_protocols.
+
+ - The "Really malformed thing" bug from the TODO file was fixed.
+ It used to convert this string:
+ x > 5 <a href="blah">
+ to:
+ x > 5 <a href="blah">
+ and now it converts it to:
+ x > 5 <a href="blah">
+
+ - The "Weird malformed thing" bug from the TODO file was fixed.
+ It used to convert this string:
+ <a href="5 href=6>
+ to:
+ <a href="6">
+ because of the way kses restarts after a parse error in kses_hair().
+ Now it converts it to:
+ <a>
+
+ - A problem with slashes in HTML tags was fixed.
+
+ - examples/filter.php used to use $SCRIPT_NAME, which doesn't work on
+ Windows.
+ (Reported by Simon Cornelius P. Umacob - thanks!)
+
+ - kses now allows dashes in attribute names, for things like
+ <meta http-equiv=..>.
+
+Procedural
+ * 0.1.0, first public version
+
+ 0.1.0 was released on the 9th of June 2003.
+ It was announced on three security related mailing lists on Friday the
+ 13th of June (nothing bad happened to it though).
diff --git a/mod/kses/vendors/kses/oop/oop.simple.api.txt b/mod/kses/vendors/kses/oop/oop.simple.api.txt new file mode 100644 index 000000000..144308a93 --- /dev/null +++ b/mod/kses/vendors/kses/oop/oop.simple.api.txt @@ -0,0 +1,58 @@ +Parse($string = "")
+ The basic function of kses. Give it a $string, and it will strip
+ out the unwanted HTML and attributes.
+
+AddProtocols()
+ Add a protocol or list of protocols to the kses object to be
+ considered valid during a Parse(). The parameter can be a string
+ containing a single protocol, or an array of strings, each
+ containing a single protocol.
+
+Protocols()
+ Deprecated. Use AddProtocols()
+
+AddProtocol($protocol = "")
+ Adds a single protocol to the kses object that will be considered
+ valid during a Parse().
+
+SetProtocols()
+ This is a straight setting/overwrite of existing protocols in the
+ kses object. All existing protocols are removed, and the parameter
+ is used to determine what protocol(s) the kses object will consider
+ valid. The parameter can be a string containing a single protocol,
+ or an array of strings, each constaining a single protocol.
+
+DumpProtocols()
+ This returns an indexed array of the valid protocols contained in
+ the kses object.
+
+DumpElements()
+ This returns an associative array of the valid (X)HTML elements in
+ the kses object along with attributes for each element, and tests
+ that will be performed on each attribute.
+
+AddHTML($tag = "", $attribs = array())
+ This allows the end user to add a single (X)HTML element to the
+ kses object along with the (if any) attributes that the specific
+ (X)HTML element is allowed to have.
+
+ See the file 'attribute-value-checks' for more information as to
+ the format of the data to be provided to this method.
+
+RemoveProtocol($protocol = "")
+ This allows for the removal of a single protocol from the list of
+ valid protocols in the kses object.
+
+RemoveProtocols()
+ This allows for the single or batch removal of protocols from the
+ kses object. The parameter is either a string containing a
+ protocol to be removed, or an array of strings that each contain
+ a protocol.
+
+filterKsesTextHook($string)
+ For the OOP version of kses, this is an additional hook that allows
+ the end user to perform additional postprocessing of a string
+ that's being run through Parse().
+
+_hook()
+ Deprecated. Use filterKsesTextHook().
\ No newline at end of file diff --git a/mod/kses/vendors/kses/oop/php4.class.kses.php b/mod/kses/vendors/kses/oop/php4.class.kses.php new file mode 100644 index 000000000..acb06cc59 --- /dev/null +++ b/mod/kses/vendors/kses/oop/php4.class.kses.php @@ -0,0 +1,1162 @@ +<?php
+ /*
+ * ==========================================================================================
+ *
+ * This program is free software and open source software; you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ * ==========================================================================================
+ */
+
+ /**
+ * Class file for PHP4 OOP version of kses
+ *
+ * This is an updated version of kses to work with PHP4 that works under E_STRICT.
+ *
+ * This upgrade provides the following:
+ * + Version number synced to procedural version number
+ * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
+ * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
+ * + Kses4 now works in E_STRICT
+ * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol() and RemoveProtocols()
+ * + Deprecated _hook(), Protocols()
+ * + Integrated code from kses 0.2.2 into class.
+ * + Added methods DumpProtocols(), DumpMethods()
+ *
+ * @package kses
+ * @subpackage kses4
+ */
+
+ if(substr(phpversion(), 0, 1) < 4)
+ {
+ die("Class kses requires PHP 4 or higher.");
+ }
+
+ /**
+ * Only install KSES4 once
+ */
+ if(!defined('KSES_CLASS_PHP4'))
+ {
+ define('KSES_CLASS_PHP4', true);
+
+ /**
+ * Kses strips evil scripts!
+ *
+ * This class provides the capability for removing unwanted HTML/XHTML, attributes from
+ * tags, and protocols contained in links. The net result is a much more powerful tool
+ * than the PHP internal strip_tags()
+ *
+ * This is a fork of a slick piece of procedural code called 'kses' written by Ulf Harnhammar
+ * The entire set of functions was wrapped in a PHP object with some internal modifications
+ * by Richard Vasquez (http://www.chaos.org/) 7/25/2003
+ *
+ * This upgrade provides the following:
+ * + Version number synced to procedural version number
+ * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
+ * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
+ * + Kses4 now works in E_STRICT
+ * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol(), RemoveProtocols() and SetProtocols()
+ * + Deprecated _hook(), Protocols()
+ * + Integrated code from kses 0.2.2 into class.
+ *
+ * @author Richard R. Vásquez, Jr. (Original procedural code by Ulf Härnhammar)
+ * @link http://sourceforge.net/projects/kses/ Home Page for Kses
+ * @link http://chaos.org/contact/ Contact page with current email address for Richard Vasquez
+ * @copyright Richard R. Vásquez, Jr. 2003-2005
+ * @version PHP4 OOP 0.2.2
+ * @license http://www.gnu.org/licenses/gpl.html GNU Public License
+ * @package kses
+ */
+ class kses4
+ {
+ /**#@+
+ * @access private
+ * @var array
+ */
+ var $allowed_protocols = array();
+ var $allowed_html = array();
+ /**#@-*/
+
+ /**
+ * Constructor for kses.
+ *
+ * This sets a default collection of protocols allowed in links, and creates an
+ * empty set of allowed HTML tags.
+ * @since PHP4 OOP 0.0.1
+ */
+ function kses4()
+ {
+ /**
+ * You could add protocols such as ftp, new, gopher, mailto, irc, etc.
+ *
+ * The base values the original kses provided were:
+ * 'http', 'https', 'ftp', 'news', 'nntp', 'telnet', 'gopher', 'mailto'
+ */
+ $this->allowed_protocols = array('http', 'ftp', 'mailto');
+ $this->allowed_html = array();
+ }
+
+ /**
+ * Basic task of kses - parses $string and strips it as required.
+ *
+ * This method strips all the disallowed (X)HTML tags, attributes
+ * and protocols from the input $string.
+ *
+ * @access public
+ * @param string $string String to be stripped of 'evil scripts'
+ * @return string The stripped string
+ * @since PHP4 OOP 0.2.1
+ */
+ function Parse($string = "")
+ {
+ if (get_magic_quotes_gpc())
+ {
+ $string = stripslashes($string);
+ }
+ $string = $this->_no_null($string);
+ $string = $this->_js_entities($string);
+ $string = $this->_normalize_entities($string);
+ $string = $this->filterKsesTextHook($string);
+ return $this->_split($string);
+ }
+
+ /**
+ * Allows for single/batch addition of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * The argument will be processed, and each string will be added
+ * via AddProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be added to the internal list of allowed protocols.
+ * @return bool Status of adding valid protocols.
+ * @see AddProtocol()
+ * @since PHP4 OOP 0.2.1
+ */
+ function AddProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses4::AddProtocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ foreach($protocol_data as $protocol)
+ {
+ $this->AddProtocol($protocol);
+ }
+ return true;
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->AddProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses4::AddProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * Allows for single/batch addition of protocols
+ *
+ * @deprecated Use AddProtocols()
+ * @see AddProtocols()
+ * @return bool
+ * @since PHP4 OOP 0.0.1
+ */
+ function Protocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses4::Protocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ return $this->AddProtocols(func_get_arg(0));
+ }
+
+ /**
+ * Adds a single protocol to $this->allowed_protocols.
+ *
+ * This method accepts a string argument and adds it to
+ * the list of allowed protocols to keep when performing
+ * Parse().
+ *
+ * @access public
+ * @param string $protocol The name of the protocol to be added.
+ * @return bool Status of adding valid protocol.
+ * @since PHP4 OOP 0.0.1
+ */
+ function AddProtocol($protocol = "")
+ {
+ if(!is_string($protocol))
+ {
+ trigger_error("kses4::AddProtocol() requires a string.", E_USER_WARNING);
+ return false;
+ }
+
+ $protocol = strtolower(trim($protocol));
+ if($protocol == "")
+ {
+ trigger_error("kses4::AddProtocol() tried to add an empty/NULL protocol.", E_USER_WARNING);
+ return false;
+ }
+
+ // Remove any inadvertent ':' at the end of the protocol.
+ if(substr($protocol, strlen($protocol) - 1, 1) == ":")
+ {
+ $protocol = substr($protocol, 0, strlen($protocol) - 1);
+ }
+
+ if(!in_array($protocol, $this->allowed_protocols))
+ {
+ array_push($this->allowed_protocols, $protocol);
+ sort($this->allowed_protocols);
+ }
+ return true;
+ }
+
+ /**
+ * Allows for single/batch replacement of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * Existing protocols will be removed, then the argument will be
+ * processed, and each string will be added via AddProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be the new internal list of allowed protocols.
+ * @return bool Status of replacing valid protocols.
+ * @since PHP4 OOP 0.2.2
+ * @see AddProtocol()
+ */
+ function SetProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses4::SetProtocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ $this->allowed_protocols = array();
+ foreach($protocol_data as $protocol)
+ {
+ $this->AddProtocol($protocol);
+ }
+ return true;
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->allowed_protocols = array();
+ $this->AddProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses4::SetProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * Raw dump of allowed protocols
+ *
+ * This returns an indexed array of allowed protocols for a particular KSES
+ * instantiation.
+ *
+ * @access public
+ * @return array The list of allowed protocols.
+ * @since PHP4 OOP 0.2.2
+ */
+ function DumpProtocols()
+ {
+ return $this->allowed_protocols;
+ }
+
+ /**
+ * Raw dump of allowed (X)HTML elements
+ *
+ * This returns an indexed array of allowed (X)HTML elements and attributes
+ * for a particular KSES instantiation.
+ *
+ * @access public
+ * @return array The list of allowed elements.
+ * @since PHP4 OOP 0.2.2
+ */
+ function DumpElements()
+ {
+ return $this->allowed_html;
+ }
+
+ /**
+ * Adds valid (X)HTML with corresponding attributes that will be kept when stripping 'evil scripts'.
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * @access public
+ * @param string $tag (X)HTML tag that will be allowed after stripping text.
+ * @param array $attribs Associative array of allowed attributes - key => attribute name - value => attribute parameter
+ * @return bool Status of Adding (X)HTML and attributes.
+ * @since PHP4 OOP 0.0.1
+ */
+ function AddHTML($tag = "", $attribs = array())
+ {
+ if(!is_string($tag))
+ {
+ trigger_error("kses4::AddHTML() requires the tag to be a string", E_USER_WARNING);
+ return false;
+ }
+
+ $tag = strtolower(trim($tag));
+ if($tag == "")
+ {
+ trigger_error("kses4::AddHTML() tried to add an empty/NULL tag", E_USER_WARNING);
+ return false;
+ }
+
+ if(!is_array($attribs))
+ {
+ trigger_error("kses4::AddHTML() requires an array (even an empty one) of attributes for '$tag'", E_USER_WARNING);
+ return false;
+ }
+
+ $new_attribs = array();
+ if(is_array($attribs) && count($attribs) > 0)
+ {
+ foreach($attribs as $idx1 => $val1)
+ {
+ $new_idx1 = strtolower($idx1);
+ $new_val1 = $attribs[$idx1];
+
+ if(is_array($new_val1) && count($new_val1) > 0)
+ {
+ $tmp_val = array();
+ foreach($new_val1 as $idx2 => $val2)
+ {
+ $new_idx2 = strtolower($idx2);
+ $tmp_val[$new_idx2] = $val2;
+ }
+ $new_val1 = $tmp_val;
+ }
+
+ $new_attribs[$new_idx1] = $new_val1;
+ }
+ }
+
+ $this->allowed_html[$tag] = $new_attribs;
+ return true;
+ }
+
+ /**
+ * Removes a single protocol from $this->allowed_protocols.
+ *
+ * This method accepts a string argument and removes it from
+ * the list of allowed protocols to keep when performing
+ * Parse().
+ *
+ * @access public
+ * @param string $protocol The name of the protocol to be removed.
+ * @return bool Status of removing valid protocol.
+ * @since PHP4 OOP 0.2.1
+ */
+ function RemoveProtocol($protocol = "")
+ {
+ if(!is_string($protocol))
+ {
+ trigger_error("kses4::RemoveProtocol() requires a string.", E_USER_WARNING);
+ return false;
+ }
+
+ // Remove any inadvertent ':' at the end of the protocol.
+ if(substr($protocol, strlen($protocol) - 1, 1) == ":")
+ {
+ $protocol = substr($protocol, 0, strlen($protocol) - 1);
+ }
+
+ $protocol = strtolower(trim($protocol));
+ if($protocol == "")
+ {
+ trigger_error("kses4::RemoveProtocol() tried to remove an empty/NULL protocol.", E_USER_WARNING);
+ return false;
+ }
+
+ // Ensures that the protocol exists before removing it.
+ if(in_array($protocol, $this->allowed_protocols))
+ {
+ $this->allowed_protocols = array_diff($this->allowed_protocols, array($protocol));
+ sort($this->allowed_protocols);
+ }
+
+ return true;
+ }
+
+ /**
+ * Allows for single/batch removal of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * The argument will be processed, and each string will be removed
+ * via RemoveProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be removed from the internal list of allowed protocols.
+ * @return bool Status of removing valid protocols.
+ * @see RemoveProtocol()
+ * @since PHP5 OOP 0.2.1
+ */
+ function RemoveProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ foreach($protocol_data as $protocol)
+ {
+ $this->RemoveProtocol($protocol);
+ }
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->RemoveProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses4::RemoveProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * This method removes any NULL or characters in $string.
+ *
+ * @access private
+ * @param string $string
+ * @return string String without any NULL/chr(173)
+ * @since PHP4 OOP 0.0.1
+ */
+ function _no_null($string)
+ {
+ $string = preg_replace('/\0+/', '', $string);
+ $string = preg_replace('/(\\\\0)+/', '', $string);
+ return $string;
+ }
+
+ /**
+ * This function removes the HTML JavaScript entities found in early versions of
+ * Netscape 4.
+ *
+ * @access private
+ * @param string $string
+ * @return string String without any NULL/chr(173)
+ * @since PHP4 OOP 0.0.1
+ */
+ function _js_entities($string)
+ {
+ return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
+ }
+
+ /**
+ * Normalizes HTML entities
+ *
+ * This function normalizes HTML entities. It will convert "AT&T" to the correct
+ * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
+ *
+ * @access private
+ * @param string $string
+ * @return string String with normalized entities
+ * @since PHP4 OOP 0.0.1
+ */
+ function _normalize_entities($string)
+ {
+ # Disarm all entities by converting & to &
+ $string = str_replace('&', '&', $string);
+
+ # Change back the allowed entities in our entity white list
+
+ $string = preg_replace('/&([A-Za-z][A-Za-z0-9]{0,19});/', '&\\1;', $string);
+ $string = preg_replace('/&#0*([0-9]{1,5});/e', '\$this->_normalize_entities2("\\1")', $string);
+ $string = preg_replace('/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/', '&#\\1\\2;', $string);
+
+ return $string;
+ }
+
+ /**
+ * Helper method used by normalizeEntites()
+ *
+ * This method helps normalizeEntities() to only accept 16 bit values
+ * and nothing more for &#number; entities.
+ *
+ * This method helps normalize_entities() during a preg_replace()
+ * where a &#(0)*XXXXX; occurs. The '(0)*XXXXXX' value is converted to
+ * a number and the result is returned as a numeric entity if the number
+ * is less than 65536. Otherwise, the value is returned 'as is'.
+ *
+ * @access private
+ * @param string $i
+ * @return string Normalized numeric entity
+ * @see _normalize_entities()
+ * @since PHP4 OOP 0.0.1
+ */
+ function _normalize_entities2($i)
+ {
+ return (($i > 65535) ? "&#$i;" : "&#$i;");
+ }
+
+ /**
+ * Allows for additional user defined modifications to text.
+ *
+ * @deprecated use filterKsesTextHook()
+ * @param string $string
+ * @see filterKsesTextHook()
+ * @return string
+ * @since PHP4 OOP 0.0.1
+ */
+ function _hook($string)
+ {
+ return $this->filterKsesTextHook($string);
+ }
+
+ /**
+ * Allows for additional user defined modifications to text.
+ *
+ * This method allows for additional modifications to be performed on
+ * a string that's being run through Parse(). Currently, it returns the
+ * input string 'as is'.
+ *
+ * This method is provided for users to extend the kses class for their own
+ * requirements.
+ *
+ * @access public
+ * @param string $string String to perfrom additional modifications on.
+ * @return string User modified string.
+ * @see Parse()
+ * @since PHP5 OOP 1.0.0
+ */
+ function filterKsesTextHook($string)
+ {
+ return $string;
+ }
+
+ /**
+ * This method goes through an array, and changes the keys to all lower case.
+ *
+ * @access private
+ * @param array $in_array Associative array
+ * @return array Modified array
+ * @since PHP4 OOP 0.0.1
+ */
+ function _array_lc($inarray)
+ {
+ $outarray = array();
+
+ if(is_array($inarray) && count($inarray) > 0)
+ {
+ foreach ($inarray as $inkey => $inval)
+ {
+ $outkey = strtolower($inkey);
+ $outarray[$outkey] = array();
+
+ if(is_array($inval) && count($inval) > 0)
+ {
+ foreach ($inval as $inkey2 => $inval2)
+ {
+ $outkey2 = strtolower($inkey2);
+ $outarray[$outkey][$outkey2] = $inval2;
+ }
+ }
+ }
+ }
+
+ return $outarray;
+ }
+
+ /**
+ * This method searched for HTML tags, no matter how malformed. It also
+ * matches stray ">" characters.
+ *
+ * @access private
+ * @param string $string
+ * @return string HTML tags
+ * @since PHP4 OOP 0.0.1
+ */
+ function _split($string)
+ {
+ return preg_replace(
+ '%(<'. # EITHER: <
+ '[^>]*'. # things that aren't >
+ '(>|$)'. # > or end of string
+ '|>)%e', # OR: just a >
+ "\$this->_split2('\\1')",
+ $string);
+ }
+
+ /**
+ * This method strips out disallowed and/or mangled (X)HTML tags along with assigned attributes.
+ *
+ * This method does a lot of work. It rejects some very malformed things
+ * like <:::>. It returns an empty string if the element isn't allowed (look
+ * ma, no strip_tags()!). Otherwise it splits the tag into an element and an
+ * allowed attribute list.
+ *
+ * @access private
+ * @param string $string
+ * @return string Modified string minus disallowed/mangled (X)HTML and attributes
+ * @since PHP4 OOP 0.0.1
+ */
+ function _split2($string)
+ {
+ $string = $this->_stripslashes($string);
+
+ if (substr($string, 0, 1) != '<')
+ {
+ # It matched a ">" character
+ return '>';
+ }
+
+ if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
+ {
+ # It's seriously malformed
+ return '';
+ }
+
+ $slash = trim($matches[1]);
+ $elem = $matches[2];
+ $attrlist = $matches[3];
+
+ if (
+ !isset($this->allowed_html[strtolower($elem)]) ||
+ !is_array($this->allowed_html[strtolower($elem)])
+ )
+ {
+ # They are using a not allowed HTML element
+ return '';
+ }
+
+ if ($slash != '')
+ {
+ return "<$slash$elem>";
+ }
+ # No attributes are allowed for closing elements
+
+ return $this->_attr("$slash$elem", $attrlist);
+ }
+
+ /**
+ * This method strips out disallowed attributes for (X)HTML tags.
+ *
+ * This method removes all attributes if none are allowed for this element.
+ * If some are allowed it calls $this->_hair() to split them further, and then it
+ * builds up new HTML code from the data that $this->_hair() returns. It also
+ * removes "<" and ">" characters, if there are any left. One more thing it
+ * does is to check if the tag has a closing XHTML slash, and if it does,
+ * it puts one in the returned code as well.
+ *
+ * @access private
+ * @param string $element (X)HTML tag to check
+ * @param string $attr Text containing attributes to check for validity.
+ * @return string Resulting valid (X)HTML or ''
+ * @see _hair()
+ * @since PHP4 OOP 0.0.1
+ */
+ function _attr($element, $attr)
+ {
+ # Is there a closing XHTML slash at the end of the attributes?
+ $xhtml_slash = '';
+ if (preg_match('%\s/\s*$%', $attr))
+ {
+ $xhtml_slash = ' /';
+ }
+
+ # Are any attributes allowed at all for this element?
+ if (
+ !isset($this->allowed_html[strtolower($element)]) ||
+ count($this->allowed_html[strtolower($element)]) == 0
+ )
+ {
+ return "<$element$xhtml_slash>";
+ }
+
+ # Split it
+ $attrarr = $this->_hair($attr);
+
+ # Go through $attrarr, and save the allowed attributes for this element
+ # in $attr2
+ $attr2 = '';
+ if(is_array($attrarr) && count($attrarr) > 0)
+ {
+ foreach ($attrarr as $arreach)
+ {
+ if(!isset($this->allowed_html[strtolower($element)][strtolower($arreach['name'])]))
+ {
+ continue;
+ }
+
+ $current = $this->allowed_html[strtolower($element)][strtolower($arreach['name'])];
+ if ($current == '')
+ {
+ # the attribute is not allowed
+ continue;
+ }
+
+ if (!is_array($current))
+ {
+ # there are no checks
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ else
+ {
+ # there are some checks
+ $ok = true;
+ if(is_array($current) && count($current) > 0)
+ {
+ foreach ($current as $currkey => $currval)
+ {
+ if (!$this->_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval))
+ {
+ $ok = false;
+ break;
+ }
+ }
+
+ if ($ok)
+ {
+ # it passed them
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ }
+ }
+ }
+ }
+
+ # Remove any "<" or ">" characters
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
+ return "<$element$attr2$xhtml_slash>";
+ }
+
+ /**
+ * This method combs through an attribute list string and returns an associative array of attributes and values.
+ *
+ * This method does a lot of work. It parses an attribute list into an array
+ * with attribute data, and tries to do the right thing even if it gets weird
+ * input. It will add quotes around attribute values that don't have any quotes
+ * or apostrophes around them, to make it easier to produce HTML code that will
+ * conform to W3C's HTML specification. It will also remove bad URL protocols
+ * from attribute values.
+ *
+ * @access private
+ * @param string $attr Text containing tag attributes for parsing
+ * @return array Associative array containing data on attribute and value
+ * @since PHP4 OOP 0.0.1
+ */
+ function _hair($attr)
+ {
+ $attrarr = array();
+ $mode = 0;
+ $attrname = '';
+
+ # Loop through the whole attribute list
+
+ while (strlen($attr) != 0)
+ {
+ # Was the last operation successful?
+ $working = 0;
+
+ switch ($mode)
+ {
+ case 0: # attribute name, href for instance
+ if (preg_match('/^([-a-zA-Z]+)/', $attr, $match))
+ {
+ $attrname = $match[1];
+ $working = $mode = 1;
+ $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ }
+ break;
+ case 1: # equals sign or valueless ("selected")
+ if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ {
+ $working = 1;
+ $mode = 2;
+ $attr = preg_replace('/^\s*=\s*/', '', $attr);
+ break;
+ }
+ if (preg_match('/^\s+/', $attr)) # valueless
+ {
+ $working = 1;
+ $mode = 0;
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y'
+ );
+ $attr = preg_replace('/^\s+/', '', $attr);
+ }
+ break;
+ case 2: # attribute value, a URL after href= for instance
+ if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) # "value"
+ {
+ $thisval = $this->_bad_protocol($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname=\"$thisval\"",
+ 'vless' => 'n'
+ );
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
+ break;
+ }
+ if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) # 'value'
+ {
+ $thisval = $this->_bad_protocol($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname='$thisval'",
+ 'vless' => 'n'
+ );
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
+ break;
+ }
+ if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) # value
+ {
+ $thisval = $this->_bad_protocol($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname=\"$thisval\"",
+ 'vless' => 'n'
+ );
+ # We add quotes to conform to W3C's HTML spec.
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
+ }
+ break;
+ }
+
+ if ($working == 0) # not well formed, remove and try again
+ {
+ $attr = $this->_html_error($attr);
+ $mode = 0;
+ }
+ }
+
+ # special case, for when the attribute list ends with a valueless
+ # attribute like "selected"
+ if ($mode == 1)
+ {
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y'
+ );
+ }
+
+ return $attrarr;
+ }
+
+ /**
+ * This method removes disallowed protocols.
+ *
+ * This method removes all non-allowed protocols from the beginning of
+ * $string. It ignores whitespace and the case of the letters, and it does
+ * understand HTML entities. It does its work in a while loop, so it won't be
+ * fooled by a string like "javascript:javascript:alert(57)".
+ *
+ * @access private
+ * @param string $string String to check for protocols
+ * @return string String with removed protocols
+ * @since PHP4 OOP 0.0.1
+ */
+ function _bad_protocol($string)
+ {
+ $string = $this->_no_null($string);
+ $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
+ $string2 = $string.'a';
+
+ while ($string != $string2)
+ {
+ $string2 = $string;
+ $string = $this->_bad_protocol_once($string);
+ } # while
+
+ return $string;
+ }
+
+ /**
+ * Helper method used by _bad_protocol()
+ *
+ * This function searches for URL protocols at the beginning of $string, while
+ * handling whitespace and HTML entities.
+ *
+ * @access private
+ * @param string $string String to check for protocols
+ * @return string String with removed protocols
+ * @see _bad_protocol()
+ * @since PHP4 OOP 0.0.1
+ */
+ function _bad_protocol_once($string)
+ {
+ return preg_replace(
+ '/^((&[^;]*;|[\sA-Za-z0-9])*)'.
+ '(:|:|&#[Xx]3[Aa];)\s*/e',
+ '\$this->_bad_protocol_once2("\\1")',
+ $string
+ );
+ }
+
+ /**
+ * Helper method used by _bad_protocol_once() regex
+ *
+ * This function processes URL protocols, checks to see if they're in the white-
+ * list or not, and returns different data depending on the answer.
+ *
+ * @access private
+ * @param string $string String to check for protocols
+ * @return string String with removed protocols
+ * @see _bad_protocol()
+ * @see _bad_protocol_once()
+ * @since PHP4 OOP 0.0.1
+ */
+ function _bad_protocol_once2($string)
+ {
+ $string = $this->_decode_entities($string);
+ $string = preg_replace('/\s/', '', $string);
+ $string = $this->_no_null($string);
+ $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
+ $string = strtolower($string);
+
+ $allowed = false;
+ if(is_array($this->allowed_protocols) && count($this->allowed_protocols) > 0)
+ {
+ foreach ($this->allowed_protocols as $one_protocol)
+ {
+ if (strtolower($one_protocol) == $string)
+ {
+ $allowed = true;
+ break;
+ }
+ }
+ }
+
+ if ($allowed)
+ {
+ return "$string:";
+ }
+ else
+ {
+ return '';
+ }
+ }
+
+ /**
+ * This function performs different checks for attribute values.
+ *
+ * The currently implemented checks are "maxlen", "minlen", "maxval",
+ * "minval" and "valueless" with even more checks to come soon.
+ *
+ * @access private
+ * @param string $value The value of the attribute to be checked.
+ * @param string $vless Indicates whether the the value is supposed to be valueless
+ * @param string $checkname The check to be performed
+ * @param string $checkvalue The value that is to be checked against
+ * @return bool Indicates whether the check passed or not
+ * @since PHP4 OOP 0.0.1
+ */
+ function _check_attr_val($value, $vless, $checkname, $checkvalue)
+ {
+ $ok = true;
+
+ switch (strtolower($checkname))
+ {
+ /**
+ * The maxlen check makes sure that the attribute value has a length not
+ * greater than the given value. This can be used to avoid Buffer Overflows
+ * in WWW clients and various Internet servers.
+ */
+ case 'maxlen':
+ if (strlen($value) > $checkvalue)
+ {
+ $ok = false;
+ }
+ break;
+
+ /**
+ * The minlen check makes sure that the attribute value has a length not
+ * smaller than the given value.
+ */
+ case 'minlen':
+ if (strlen($value) < $checkvalue)
+ {
+ $ok = false;
+ }
+ break;
+
+ /**
+ * The maxval check does two things: it checks that the attribute value is
+ * an integer from 0 and up, without an excessive amount of zeroes or
+ * whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ * value is not greater than the given value.
+ * This check can be used to avoid Denial of Service attacks.
+ */
+ case 'maxval':
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ {
+ $ok = false;
+ }
+ if ($value > $checkvalue)
+ {
+ $ok = false;
+ }
+ break;
+
+ /**
+ * The minval check checks that the attribute value is a positive integer,
+ * and that it is not smaller than the given value.
+ */
+ case 'minval':
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ {
+ $ok = false;
+ }
+ if ($value < $checkvalue)
+ {
+ $ok = false;
+ }
+ break;
+
+ /**
+ * The valueless check checks if the attribute has a value
+ * (like <a href="blah">) or not (<option selected>). If the given value
+ * is a "y" or a "Y", the attribute must not have a value.
+ * If the given value is an "n" or an "N", the attribute must have one.
+ */
+ case 'valueless':
+ if (strtolower($checkvalue) != $vless)
+ {
+ $ok = false;
+ }
+ break;
+
+ }
+
+ return $ok;
+ }
+
+ /**
+ * Changes \" to "
+ *
+ * This function changes the character sequence \" to just "
+ * It leaves all other slashes alone. It's really weird, but the quoting from
+ * preg_replace(//e) seems to require this.
+ *
+ * @access private
+ * @param string $string The string to be stripped.
+ * @return string string stripped of \"
+ * @since PHP4 OOP 0.0.1
+ */
+ function _stripslashes($string)
+ {
+ return preg_replace('%\\\\"%', '"', $string);
+ }
+
+ /**
+ * helper method for _hair()
+ *
+ * This function deals with parsing errors in _hair(). The general plan is
+ * to remove everything to and including some whitespace, but it deals with
+ * quotes and apostrophes as well.
+ *
+ * @access private
+ * @param string $string The string to be stripped.
+ * @return string string stripped of whitespace
+ * @see _hair()
+ * @since PHP4 OOP 0.0.1
+ */
+ function _html_error($string)
+ {
+ return preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $string);
+ }
+
+ /**
+ * Decodes numeric HTML entities
+ *
+ * This method decodes numeric HTML entities (A and A). It doesn't
+ * do anything with other entities like ä, but we don't need them in the
+ * URL protocol white listing system anyway.
+ *
+ * @access private
+ * @param string $value The entitiy to be decoded.
+ * @return string Decoded entity
+ * @since PHP4 OOP 0.0.1
+ */
+ function _decode_entities($string)
+ {
+ $string = preg_replace('/&#([0-9]+);/e', 'chr("\\1")', $string);
+ $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string);
+ return $string;
+ }
+
+ /**
+ * Returns PHP4 OOP version # of kses.
+ *
+ * Since this class has been refactored and documented and proven to work,
+ * I'm syncing the version number to procedural kses.
+ *
+ * @access public
+ * @return string Version number
+ * @since PHP4 OOP 0.0.1
+ */
+ function _version()
+ {
+ return 'PHP4 0.2.2 (OOP fork of procedural kses 0.2.2)';
+ }
+ }
+
+
+
+ }
+?>
\ No newline at end of file diff --git a/mod/kses/vendors/kses/oop/php5.class.kses.php b/mod/kses/vendors/kses/oop/php5.class.kses.php new file mode 100644 index 000000000..541f1bd1e --- /dev/null +++ b/mod/kses/vendors/kses/oop/php5.class.kses.php @@ -0,0 +1,1172 @@ +<?php
+
+ /*
+ * ==========================================================================================
+ *
+ * This program is free software and open source software; you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA or visit
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ * ==========================================================================================
+ */
+
+ /**
+ * Class file for PHP5 OOP version of kses
+ *
+ * This is an updated version of kses to work with PHP5 that works under E_STRICT.
+ *
+ * This version is a bit of a rewrite to match my own coding style and use some of the
+ * capabilities allowed in PHP5. Since this was a significant rewrite, but it still
+ * maintains backward compatibility syntax-wise, the version number is now 1.0.0. Any
+ * minor changes that do not break compatibility will be indicated in the second or third
+ * digits. Anything that breaks compatibility will change the major version number.
+ *
+ * PHP5 specific changes:
+ * + Private methods are now in place
+ * + __construct() is now used rather then the standard class name 'kses()'
+ * + Kses will not load in any version less that PHP5
+ * Other modifications:
+ * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
+ * + Method names have been changed to reflect status as verbs
+ * + One line methods have been folded into the code
+ * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
+ * + Kses5 now works in E_STRICT
+ * + Version number is 1.0.0 to reflect serious code changes
+ * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol(), RemoveProtocols() and SetProtocols()
+ * + Deprecated _hook(), Protocols()
+ *
+ * @package kses
+ * @subpackage kses5
+ */
+
+ if(substr(phpversion(), 0, 1) < 5)
+ {
+ die("Class kses requires PHP 5 or higher.");
+ }
+
+ /**
+ * Only install KSES5 once
+ */
+ if(!defined('KSES_CLASS_PHP5'))
+ {
+ define('KSES_CLASS_PHP5', true);
+
+ /**
+ * Kses strips evil scripts!
+ *
+ * This class provides the capability for removing unwanted HTML/XHTML, attributes from
+ * tags, and protocols contained in links. The net result is a much more powerful tool
+ * than the PHP internal strip_tags()
+ *
+ * This is a fork of a slick piece of procedural code called 'kses' written by Ulf Harnhammar.
+ *
+ * The original class for PHP4 was basically a wrapper around all of the functions in
+ * the procedural code written by Ulf, and was released 7/25/2003.
+ *
+ * This version is a bit of a rewrite to match my own coding style and use some of the
+ * capabilities allowed in PHP5. Since this was a significant rewrite, but it still
+ * maintains backward compatibility syntax-wise, the version number is now 1.0.0. Any
+ * minor changes that do not break compatibility will be indicated in the second or third
+ * digits. Anything that breaks compatibility will change the major version number.
+ *
+ * PHP5 specific changes:
+ * + Private methods are now in place
+ * + __construct() is now used rather then the standard class name 'kses()'
+ * + Kses5 will not load in any version less that PHP5
+ * Other modifications:
+ * + PHPdoc style documentation has been added to the class. See http://www.phpdoc.org/ for more info.
+ * + Method names have been changed to reflect status as verbs
+ * + One line methods have been folded into the code
+ * + Some methods are now deprecated due to nomenclature style change. See method documentation for specifics.
+ * + Kses now works in E_STRICT
+ * + Initial Version number set to 1.0.0 to reflect serious code changes
+ * + Addition of methods AddProtocols(), filterKsestextHook(), RemoveProtocol(), RemoveProtocols() and SetProtocols()
+ * + Deprecated _hook(), Protocols()
+ * + Integrated code from kses 0.2.2 into class.
+ * + Added methods DumpProtocols(), DumpMethods()
+ *
+ * @author Richard R. Vásquez, Jr. (Original procedural code by Ulf Härnhammar)
+ * @link http://sourceforge.net/projects/kses/ Home Page for Kses
+ * @link http://chaos.org/contact/ Contact page with current email address for Richard Vasquez
+ * @copyright Richard R. Vásquez, Jr. 2005
+ * @version PHP5 OOP 1.0.2
+ * @license http://www.gnu.org/licenses/gpl.html GNU Public License
+ * @package kses
+ */
+ class kses5
+ {
+ /**#@+
+ * @access private
+ * @var array
+ */
+ private $allowed_protocols;
+ private $allowed_html;
+ /**#@-*/
+
+ /**
+ * Constructor for kses.
+ *
+ * This sets a default collection of protocols allowed in links, and creates an
+ * empty set of allowed HTML tags.
+ * @since PHP5 OOP 1.0.0
+ */
+ public function __construct()
+ {
+ /**
+ * You could add protocols such as ftp, new, gopher, mailto, irc, etc.
+ *
+ * The base values the original kses provided were:
+ * 'http', 'https', 'ftp', 'news', 'nntp', 'telnet', 'gopher', 'mailto'
+ */
+ $this->allowed_protocols = array('http', 'ftp', 'mailto');
+ $this->allowed_html = array();
+ }
+
+ /**
+ * Basic task of kses - parses $string and strips it as required.
+ *
+ * This method strips all the disallowed (X)HTML tags, attributes
+ * and protocols from the input $string.
+ *
+ * @access public
+ * @param string $string String to be stripped of 'evil scripts'
+ * @return string The stripped string
+ * @since PHP4 OOP 0.0.1
+ */
+ public function Parse($string = "")
+ {
+ if (get_magic_quotes_gpc())
+ {
+ $string = stripslashes($string);
+ }
+ $string = $this->removeNulls($string);
+ // Remove JavaScript entities from early Netscape 4 versions
+ $string = preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
+ $string = $this->normalizeEntities($string);
+ $string = $this->filterKsesTextHook($string);
+ $string = preg_replace('%(<' . '[^>]*' . '(>|$)' . '|>)%e', "\$this->stripTags('\\1')", $string);
+ return $string;
+ }
+
+ /**
+ * Allows for single/batch addition of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * The argument will be processed, and each string will be added
+ * via AddProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be added to the internal list of allowed protocols.
+ * @return bool Status of adding valid protocols.
+ * @see AddProtocol()
+ * @since PHP5 OOP 1.0.0
+ */
+ public function AddProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses5::AddProtocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ foreach($protocol_data as $protocol)
+ {
+ $this->AddProtocol($protocol);
+ }
+ return true;
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->AddProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses5::AddProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * Allows for single/batch addition of protocols
+ *
+ * @deprecated Use AddProtocols()
+ * @see AddProtocols()
+ * @return bool
+ * @since PHP4 OOP 0.0.1
+ */
+ public function Protocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses5::Protocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ return $this->AddProtocols(func_get_arg(0));
+ }
+
+ /**
+ * Adds a single protocol to $this->allowed_protocols.
+ *
+ * This method accepts a string argument and adds it to
+ * the list of allowed protocols to keep when performing
+ * Parse().
+ *
+ * @access public
+ * @param string $protocol The name of the protocol to be added.
+ * @return bool Status of adding valid protocol.
+ * @since PHP4 OOP 0.0.1
+ */
+ public function AddProtocol($protocol = "")
+ {
+ if(!is_string($protocol))
+ {
+ trigger_error("kses5::AddProtocol() requires a string.", E_USER_WARNING);
+ return false;
+ }
+
+ // Remove any inadvertent ':' at the end of the protocol.
+ if(substr($protocol, strlen($protocol) - 1, 1) == ":")
+ {
+ $protocol = substr($protocol, 0, strlen($protocol) - 1);
+ }
+
+ $protocol = strtolower(trim($protocol));
+ if($protocol == "")
+ {
+ trigger_error("kses5::AddProtocol() tried to add an empty/NULL protocol.", E_USER_WARNING);
+ return false;
+ }
+
+ // prevent duplicate protocols from being added.
+ if(!in_array($protocol, $this->allowed_protocols))
+ {
+ array_push($this->allowed_protocols, $protocol);
+ sort($this->allowed_protocols);
+ }
+ return true;
+ }
+
+ /**
+ * Removes a single protocol from $this->allowed_protocols.
+ *
+ * This method accepts a string argument and removes it from
+ * the list of allowed protocols to keep when performing
+ * Parse().
+ *
+ * @access public
+ * @param string $protocol The name of the protocol to be removed.
+ * @return bool Status of removing valid protocol.
+ * @since PHP5 OOP 1.0.0
+ */
+ public function RemoveProtocol($protocol = "")
+ {
+ if(!is_string($protocol))
+ {
+ trigger_error("kses5::RemoveProtocol() requires a string.", E_USER_WARNING);
+ return false;
+ }
+
+ // Remove any inadvertent ':' at the end of the protocol.
+ if(substr($protocol, strlen($protocol) - 1, 1) == ":")
+ {
+ $protocol = substr($protocol, 0, strlen($protocol) - 1);
+ }
+
+ $protocol = strtolower(trim($protocol));
+ if($protocol == "")
+ {
+ trigger_error("kses5::RemoveProtocol() tried to remove an empty/NULL protocol.", E_USER_WARNING);
+ return false;
+ }
+
+ // Ensures that the protocol exists before removing it.
+ if(in_array($protocol, $this->allowed_protocols))
+ {
+ $this->allowed_protocols = array_diff($this->allowed_protocols, array($protocol));
+ sort($this->allowed_protocols);
+ }
+
+ return true;
+ }
+
+ /**
+ * Allows for single/batch removal of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * The argument will be processed, and each string will be removed
+ * via RemoveProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be removed from the internal list of allowed protocols.
+ * @return bool Status of removing valid protocols.
+ * @see RemoveProtocol()
+ * @since PHP5 OOP 1.0.0
+ */
+ public function RemoveProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ foreach($protocol_data as $protocol)
+ {
+ $this->RemoveProtocol($protocol);
+ }
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->RemoveProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses5::RemoveProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * Allows for single/batch replacement of protocols
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * Existing protocols will be removed, then the argument will be
+ * processed, and each string will be added via AddProtocol().
+ *
+ * @access public
+ * @param mixed , A string or array of protocols that will be the new internal list of allowed protocols.
+ * @return bool Status of replacing valid protocols.
+ * @since PHP5 OOP 1.0.1
+ * @see AddProtocol()
+ */
+ public function SetProtocols()
+ {
+ $c_args = func_num_args();
+ if($c_args != 1)
+ {
+ trigger_error("kses5::SetProtocols() did not receive an argument.", E_USER_WARNING);
+ return false;
+ }
+
+ $protocol_data = func_get_arg(0);
+
+ if(is_array($protocol_data) && count($protocol_data) > 0)
+ {
+ $this->allowed_protocols = array();
+ foreach($protocol_data as $protocol)
+ {
+ $this->AddProtocol($protocol);
+ }
+ return true;
+ }
+ elseif(is_string($protocol_data))
+ {
+ $this->allowed_protocols = array();
+ $this->AddProtocol($protocol_data);
+ return true;
+ }
+ else
+ {
+ trigger_error("kses5::SetProtocols() did not receive a string or an array.", E_USER_WARNING);
+ return false;
+ }
+ }
+
+ /**
+ * Raw dump of allowed protocols
+ *
+ * This returns an indexed array of allowed protocols for a particular KSES
+ * instantiation.
+ *
+ * @access public
+ * @return array The list of allowed protocols.
+ * @since PHP5 OOP 1.0.2
+ */
+ public function DumpProtocols()
+ {
+ return $this->allowed_protocols;
+ }
+
+ /**
+ * Raw dump of allowed (X)HTML elements
+ *
+ * This returns an indexed array of allowed (X)HTML elements and attributes
+ * for a particular KSES instantiation.
+ *
+ * @access public
+ * @return array The list of allowed elements.
+ * @since PHP5 OOP 1.0.2
+ */
+ public function DumpElements()
+ {
+ return $this->allowed_html;
+ }
+
+
+ /**
+ * Adds valid (X)HTML with corresponding attributes that will be kept when stripping 'evil scripts'.
+ *
+ * This method accepts one argument that can be either a string
+ * or an array of strings. Invalid data will be ignored.
+ *
+ * @access public
+ * @param string $tag (X)HTML tag that will be allowed after stripping text.
+ * @param array $attribs Associative array of allowed attributes - key => attribute name - value => attribute parameter
+ * @return bool Status of Adding (X)HTML and attributes.
+ * @since PHP4 OOP 0.0.1
+ */
+ public function AddHTML($tag = "", $attribs = array())
+ {
+ if(!is_string($tag))
+ {
+ trigger_error("kses5::AddHTML() requires the tag to be a string", E_USER_WARNING);
+ return false;
+ }
+
+ $tag = strtolower(trim($tag));
+ if($tag == "")
+ {
+ trigger_error("kses5::AddHTML() tried to add an empty/NULL tag", E_USER_WARNING);
+ return false;
+ }
+
+ if(!is_array($attribs))
+ {
+ trigger_error("kses5::AddHTML() requires an array (even an empty one) of attributes for '$tag'", E_USER_WARNING);
+ return false;
+ }
+
+ $new_attribs = array();
+ if(is_array($attribs) && count($attribs) > 0)
+ {
+ foreach($attribs as $idx1 => $val1)
+ {
+ $new_idx1 = strtolower($idx1);
+ $new_val1 = $attribs[$idx1];
+
+ if(is_array($new_val1) && count($attribs) > 0)
+ {
+ $tmp_val = array();
+ foreach($new_val1 as $idx2 => $val2)
+ {
+ $new_idx2 = strtolower($idx2);
+ $tmp_val[$new_idx2] = $val2;
+ }
+ $new_val1 = $tmp_val;
+ }
+
+ $new_attribs[$new_idx1] = $new_val1;
+ }
+ }
+
+ $this->allowed_html[$tag] = $new_attribs;
+ return true;
+ }
+
+ /**
+ * This method removes any NULL characters in $string.
+ *
+ * @access private
+ * @param string $string
+ * @return string String without any NULL/chr(173)
+ * @since PHP4 OOP 0.0.1
+ */
+ private function removeNulls($string)
+ {
+ $string = preg_replace('/\0+/', '', $string);
+ $string = preg_replace('/(\\\\0)+/', '', $string);
+ return $string;
+ }
+
+ /**
+ * Normalizes HTML entities
+ *
+ * This function normalizes HTML entities. It will convert "AT&T" to the correct
+ * "AT&T", ":" to ":", "&#XYZZY;" to "&#XYZZY;" and so on.
+ *
+ * @access private
+ * @param string $string
+ * @return string String with normalized entities
+ * @since PHP4 OOP 0.0.1
+ */
+ private function normalizeEntities($string)
+ {
+ # Disarm all entities by converting & to &
+ $string = str_replace('&', '&', $string);
+
+ # TODO: Change back (Keep?) the allowed entities in our entity white list
+
+ # Keeps entities that start with [A-Za-z]
+ $string = preg_replace(
+ '/&([A-Za-z][A-Za-z0-9]{0,19});/',
+ '&\\1;',
+ $string
+ );
+
+ # Change numeric entities to valid 16 bit values
+
+ $string = preg_replace(
+ '/&#0*([0-9]{1,5});/e',
+ '\$this->normalizeEntities16bit("\\1")',
+ $string
+ );
+
+ # Change &XHHHHHHH (Hex digits) to 16 bit hex values
+ $string = preg_replace(
+ '/&#([Xx])0*(([0-9A-Fa-f]{2}){1,2});/',
+ '&#\\1\\2;',
+ $string
+ );
+
+ return $string;
+ }
+
+ /**
+ * Helper method used by normalizeEntites()
+ *
+ * This method helps normalizeEntities() to only accept 16 bit values
+ * and nothing more for &#number; entities.
+ *
+ * This method helps normalize_entities() during a preg_replace()
+ * where a &#(0)*XXXXX; occurs. The '(0)*XXXXXX' value is converted to
+ * a number and the result is returned as a numeric entity if the number
+ * is less than 65536. Otherwise, the value is returned 'as is'.
+ *
+ * @access private
+ * @param string $i
+ * @return string Normalized numeric entity
+ * @see normalizeEntities()
+ * @since PHP4 OOP 0.0.1
+ */
+ private function normalizeEntities16bit($i)
+ {
+ return (($i > 65535) ? "&#$i;" : "&#$i;");
+ }
+
+ /**
+ * Allows for additional user defined modifications to text.
+ *
+ * This method allows for additional modifications to be performed on
+ * a string that's being run through Parse(). Currently, it returns the
+ * input string 'as is'.
+ *
+ * This method is provided for users to extend the kses class for their own
+ * requirements.
+ *
+ * @access public
+ * @param string $string String to perfrom additional modifications on.
+ * @return string User modified string.
+ * @see Parse()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function filterKsesTextHook($string)
+ {
+ return $string;
+ }
+
+ /**
+ * Allows for additional user defined modifications to text.
+ *
+ * @deprecated use filterKsesTextHook()
+ * @param string $string
+ * @return string
+ * @see filterKsesTextHook()
+ * @since PHP4 OOP 0.0.1
+ */
+ private function _hook($string)
+ {
+ return $this->filterKsesTextHook($string);
+ }
+
+ /**
+ * This method goes through an array, and changes the keys to all lower case.
+ *
+ * @access private
+ * @param array $in_array Associative array
+ * @return array Modified array
+ * @since PHP4 OOP 0.0.1
+ */
+ private function makeArrayKeysLowerCase($in_array)
+ {
+ $out_array = array();
+
+ if(is_array($in_array) && count($in_array) > 0)
+ {
+ foreach ($in_array as $in_key => $in_val)
+ {
+ $out_key = strtolower($in_key);
+ $out_array[$out_key] = array();
+
+ if(is_array($in_val) && count($in_val) > 0)
+ {
+ foreach ($in_val as $in_key2 => $in_val2)
+ {
+ $out_key2 = strtolower($in_key2);
+ $out_array[$out_key][$out_key2] = $in_val2;
+ }
+ }
+ }
+ }
+
+ return $out_array;
+ }
+
+ /**
+ * This method strips out disallowed and/or mangled (X)HTML tags along with assigned attributes.
+ *
+ * This method does a lot of work. It rejects some very malformed things
+ * like <:::>. It returns an empty string if the element isn't allowed (look
+ * ma, no strip_tags()!). Otherwise it splits the tag into an element and an
+ * allowed attribute list.
+ *
+ * @access private
+ * @param string $string
+ * @return string Modified string minus disallowed/mangled (X)HTML and attributes
+ * @since PHP4 OOP 0.0.1
+ */
+ private function stripTags($string)
+ {
+ $string = preg_replace('%\\\\"%', '"', $string);
+
+ if (substr($string, 0, 1) != '<')
+ {
+ # It matched a ">" character
+ return '>';
+ }
+
+ if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
+ {
+ # It's seriously malformed
+ return '';
+ }
+
+ $slash = trim($matches[1]);
+ $elem = $matches[2];
+ $attrlist = $matches[3];
+
+ if (
+ !isset($this->allowed_html[strtolower($elem)]) ||
+ !is_array($this->allowed_html[strtolower($elem)]))
+ {
+ # Found an HTML element not in the white list
+ return '';
+ }
+
+ if ($slash != '')
+ {
+ return "<$slash$elem>";
+ }
+ # No attributes are allowed for closing elements
+
+ return $this->stripAttributes("$slash$elem", $attrlist);
+ }
+
+ /**
+ * This method strips out disallowed attributes for (X)HTML tags.
+ *
+ * This method removes all attributes if none are allowed for this element.
+ * If some are allowed it calls combAttributes() to split them further, and then it
+ * builds up new HTML code from the data that combAttributes() returns. It also
+ * removes "<" and ">" characters, if there are any left. One more thing it
+ * does is to check if the tag has a closing XHTML slash, and if it does,
+ * it puts one in the returned code as well.
+ *
+ * @access private
+ * @param string $element (X)HTML tag to check
+ * @param string $attr Text containing attributes to check for validity.
+ * @return string Resulting valid (X)HTML or ''
+ * @see combAttributes()
+ * @since PHP4 OOP 0.0.1
+ */
+ private function stripAttributes($element, $attr)
+ {
+ # Is there a closing XHTML slash at the end of the attributes?
+ $xhtml_slash = '';
+ if (preg_match('%\s/\s*$%', $attr))
+ {
+ $xhtml_slash = ' /';
+ }
+
+ # Are any attributes allowed at all for this element?
+ if (
+ !isset($this->allowed_html[strtolower($element)]) ||
+ count($this->allowed_html[strtolower($element)]) == 0
+ )
+ {
+ return "<$element$xhtml_slash>";
+ }
+
+ # Split it
+ $attrarr = $this->combAttributes($attr);
+
+ # Go through $attrarr, and save the allowed attributes for this element
+ # in $attr2
+ $attr2 = '';
+ if(is_array($attrarr) && count($attrarr) > 0)
+ {
+ foreach ($attrarr as $arreach)
+ {
+ if(!isset($this->allowed_html[strtolower($element)][strtolower($arreach['name'])]))
+ {
+ continue;
+ }
+
+ $current = $this->allowed_html[strtolower($element)][strtolower($arreach['name'])];
+
+ if (!is_array($current))
+ {
+ # there are no checks
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ else
+ {
+ # there are some checks
+ $ok = true;
+ if(is_array($current) && count($current) > 0)
+ {
+ foreach ($current as $currkey => $currval)
+ {
+ if (!$this->checkAttributeValue($arreach['value'], $arreach['vless'], $currkey, $currval))
+ {
+ $ok = false;
+ break;
+ }
+ }
+ }
+
+ if ($ok)
+ {
+ # it passed them
+ $attr2 .= ' '.$arreach['whole'];
+ }
+ }
+ }
+ }
+
+ # Remove any "<" or ">" characters
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
+ return "<$element$attr2$xhtml_slash>";
+ }
+
+ /**
+ * This method combs through an attribute list string and returns an associative array of attributes and values.
+ *
+ * This method does a lot of work. It parses an attribute list into an array
+ * with attribute data, and tries to do the right thing even if it gets weird
+ * input. It will add quotes around attribute values that don't have any quotes
+ * or apostrophes around them, to make it easier to produce HTML code that will
+ * conform to W3C's HTML specification. It will also remove bad URL protocols
+ * from attribute values.
+ *
+ * @access private
+ * @param string $attr Text containing tag attributes for parsing
+ * @return array Associative array containing data on attribute and value
+ * @since PHP4 OOP 0.0.1
+ */
+ private function combAttributes($attr)
+ {
+ $attrarr = array();
+ $mode = 0;
+ $attrname = '';
+
+ # Loop through the whole attribute list
+
+ while (strlen($attr) != 0)
+ {
+ # Was the last operation successful?
+ $working = 0;
+
+ switch ($mode)
+ {
+ case 0: # attribute name, href for instance
+ if (preg_match('/^([-a-zA-Z]+)/', $attr, $match))
+ {
+ $attrname = $match[1];
+ $working = $mode = 1;
+ $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ }
+ break;
+ case 1: # equals sign or valueless ("selected")
+ if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ {
+ $working = 1;
+ $mode = 2;
+ $attr = preg_replace('/^\s*=\s*/', '', $attr);
+ break;
+ }
+ if (preg_match('/^\s+/', $attr)) # valueless
+ {
+ $working = 1;
+ $mode = 0;
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y'
+ );
+ $attr = preg_replace('/^\s+/', '', $attr);
+ }
+ break;
+ case 2: # attribute value, a URL after href= for instance
+ if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) # "value"
+ {
+ $thisval = $this->removeBadProtocols($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => $attrname . '="' . $thisval . '"',
+ 'vless' => 'n'
+ );
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
+ break;
+ }
+ if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) # 'value'
+ {
+ $thisval = $this->removeBadProtocols($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => "$attrname='$thisval'",
+ 'vless' => 'n'
+ );
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
+ break;
+ }
+ if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) # value
+ {
+ $thisval = $this->removeBadProtocols($match[1]);
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => $thisval,
+ 'whole' => $attrname . '="' . $thisval . '"',
+ 'vless' => 'n'
+ );
+ # We add quotes to conform to W3C's HTML spec.
+ $working = 1;
+ $mode = 0;
+ $attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
+ }
+ break;
+ }
+
+ if ($working == 0) # not well formed, remove and try again
+ {
+ $attr = preg_replace('/^("[^"]*("|$)|\'[^\']*(\'|$)|\S)*\s*/', '', $attr);
+ $mode = 0;
+ }
+ }
+
+ # special case, for when the attribute list ends with a valueless
+ # attribute like "selected"
+ if ($mode == 1)
+ {
+ $attrarr[] = array(
+ 'name' => $attrname,
+ 'value' => '',
+ 'whole' => $attrname,
+ 'vless' => 'y'
+ );
+ }
+
+ return $attrarr;
+ }
+
+ /**
+ * This method removes disallowed protocols.
+ *
+ * This method removes all non-allowed protocols from the beginning of
+ * $string. It ignores whitespace and the case of the letters, and it does
+ * understand HTML entities. It does its work in a while loop, so it won't be
+ * fooled by a string like "javascript:javascript:alert(57)".
+ *
+ * @access private
+ * @param string $string String to check for protocols
+ * @return string String with removed protocols
+ * @since PHP4 OOP 0.0.1
+ */
+ private function removeBadProtocols($string)
+ {
+ $string = $this->RemoveNulls($string);
+ $string = preg_replace('/\xad+/', '', $string); # deals with Opera "feature"
+ $string2 = $string . 'a';
+
+ while ($string != $string2)
+ {
+ $string2 = $string;
+ $string = preg_replace(
+ '/^((&[^;]*;|[\sA-Za-z0-9])*)'.
+ '(:|:|&#[Xx]3[Aa];)\s*/e',
+ '\$this->filterProtocols("\\1")',
+ $string
+ );
+ }
+
+ return $string;
+ }
+
+ /**
+ * Helper method used by removeBadProtocols()
+ *
+ * This function processes URL protocols, checks to see if they're in the white-
+ * list or not, and returns different data depending on the answer.
+ *
+ * @access private
+ * @param string $string String to check for protocols
+ * @return string String with removed protocols
+ * @see removeBadProtocols()
+ * @since PHP4 OOP 0.0.1
+ */
+ private function filterProtocols($string)
+ {
+ $string = $this->decodeEntities($string);
+ $string = preg_replace('/\s/', '', $string);
+ $string = $this->removeNulls($string);
+ $string = preg_replace('/\xad+/', '', $string2); # deals with Opera "feature"
+ $string = strtolower($string);
+
+ if(is_array($this->allowed_protocols) && count($this->allowed_protocols) > 0)
+ {
+ foreach ($this->allowed_protocols as $one_protocol)
+ {
+ if (strtolower($one_protocol) == $string)
+ {
+ return "$string:";
+ }
+ }
+ }
+
+ return '';
+ }
+
+ /**
+ * Controller method for performing checks on attribute values.
+ *
+ * This method calls the appropriate method as specified by $checkname with
+ * the parameters $value, $vless, and $checkvalue, and returns the result
+ * of the call.
+ *
+ * This method's functionality can be expanded by creating new methods
+ * that would match checkAttributeValue[$checkname].
+ *
+ * Current checks implemented are: "maxlen", "minlen", "maxval", "minval" and "valueless"
+ *
+ * @access private
+ * @param string $value The value of the attribute to be checked.
+ * @param string $vless Indicates whether the the value is supposed to be valueless
+ * @param string $checkname The check to be performed
+ * @param string $checkvalue The value that is to be checked against
+ * @return bool Indicates whether the check passed or not
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValue($value, $vless, $checkname, $checkvalue)
+ {
+ $ok = true;
+ $check_attribute_method_name = 'checkAttributeValue' . ucfirst(strtolower($checkname));
+ if(method_exists($this, $check_attribute_method_name))
+ {
+ $ok = $this->$check_attribute_method_name($value, $checkvalue, $vless);
+ }
+
+ return $ok;
+ }
+
+ /**
+ * Helper method invoked by checkAttributeValue().
+ *
+ * The maxlen check makes sure that the attribute value has a length not
+ * greater than the given value. This can be used to avoid Buffer Overflows
+ * in WWW clients and various Internet servers.
+ *
+ * @access private
+ * @param string $value The value of the attribute to be checked.
+ * @param int $checkvalue The maximum value allowed
+ * @return bool Indicates whether the check passed or not
+ * @see checkAttributeValue()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValueMaxlen($value, $checkvalue)
+ {
+ if (strlen($value) > intval($checkvalue))
+ {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Helper method invoked by checkAttributeValue().
+ *
+ * The minlen check makes sure that the attribute value has a length not
+ * smaller than the given value.
+ *
+ * @access private
+ * @param string $value The value of the attribute to be checked.
+ * @param int $checkvalue The minimum value allowed
+ * @return bool Indicates whether the check passed or not
+ * @see checkAttributeValue()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValueMinlen($value, $checkvalue)
+ {
+ if (strlen($value) < intval($checkvalue))
+ {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Helper method invoked by checkAttributeValue().
+ *
+ * The maxval check does two things: it checks that the attribute value is
+ * an integer from 0 and up, without an excessive amount of zeroes or
+ * whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ * value is not greater than the given value.
+ *
+ * This check can be used to avoid Denial of Service attacks.
+ *
+ * @access private
+ * @param int $value The value of the attribute to be checked.
+ * @param int $checkvalue The maximum numeric value allowed
+ * @return bool Indicates whether the check passed or not
+ * @see checkAttributeValue()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValueMaxval($value, $checkvalue)
+ {
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ {
+ return false;
+ }
+ if (intval($value) > intval($checkvalue))
+ {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Helper method invoked by checkAttributeValue().
+ *
+ * The minval check checks that the attribute value is a positive integer,
+ * and that it is not smaller than the given value.
+ *
+ * @access private
+ * @param int $value The value of the attribute to be checked.
+ * @param int $checkvalue The minimum numeric value allowed
+ * @return bool Indicates whether the check passed or not
+ * @see checkAttributeValue()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValueMinval($value, $checkvalue)
+ {
+ if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
+ {
+ return false;
+ }
+ if (intval($value) < ($checkvalue))
+ {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Helper method invoked by checkAttributeValue().
+ *
+ * The valueless check checks if the attribute has a value
+ * (like <a href="blah">) or not (<option selected>). If the given value
+ * is a "y" or a "Y", the attribute must not have a value.
+ *
+ * If the given value is an "n" or an "N", the attribute must have one.
+ *
+ * @access private
+ * @param int $value The value of the attribute to be checked.
+ * @param mixed $checkvalue This variable is ignored for this test
+ * @param string $vless Flag indicating if this attribute is not supposed to have an attribute
+ * @return bool Indicates whether the check passed or not
+ * @see checkAttributeValue()
+ * @since PHP5 OOP 1.0.0
+ */
+ private function checkAttributeValueValueless($value, $checkvalue, $vless)
+ {
+ if (strtolower($checkvalue) != $vless)
+ {
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * Decodes numeric HTML entities
+ *
+ * This method decodes numeric HTML entities (A and A). It doesn't
+ * do anything with other entities like ä, but we don't need them in the
+ * URL protocol white listing system anyway.
+ *
+ * @access private
+ * @param string $value The entitiy to be decoded.
+ * @return string Decoded entity
+ * @since PHP4 OOP 0.0.1
+ */
+ private function decodeEntities($string)
+ {
+ $string = preg_replace('/&#([0-9]+);/e', 'chr("\\1")', $string);
+ $string = preg_replace('/&#[Xx]([0-9A-Fa-f]+);/e', 'chr(hexdec("\\1"))', $string);
+ return $string;
+ }
+
+ /**
+ * Returns PHP5 OOP version # of kses.
+ *
+ * Since this class has been refactored and documented and proven to work,
+ * I'm fixing the version number at 1.0.0.
+ *
+ * This version is syntax compatible with the PHP4 OOP version 0.0.2. Future
+ * versions may not be syntax compatible.
+ *
+ * @access public
+ * @return string Version number
+ * @since PHP4 OOP 0.0.1
+ */
+ public function Version()
+ {
+ return 'PHP5 OOP 1.0.2';
+ }
+ }
+ }
+?>
\ No newline at end of file diff --git a/mod/kses/vendors/kses/oop/test.oop.kses.php b/mod/kses/vendors/kses/oop/test.oop.kses.php new file mode 100644 index 000000000..8c6e885d8 --- /dev/null +++ b/mod/kses/vendors/kses/oop/test.oop.kses.php @@ -0,0 +1,507 @@ +<?php
+
+ // This is a q&d program that shows some of the results of
+ // running KSES. If you have further questions, check the
+ // current valid email address at http://chaos.org/contact/
+
+ // Make sure we're in a usable PHP environment
+ if(substr(phpversion(), 0, 1) < 4)
+ {
+ define('KSESTEST_VER', 0);
+ }
+ elseif(substr(phpversion(), 0, 1) >= 5)
+ {
+ define('KSESTEST_VER', 5);
+ }
+ else
+ {
+ define('KSESTEST_VER', 4);
+ }
+
+ // See if we're in command line or web
+ if($_SERVER["DOCUMENT_ROOT"] == "")
+ {
+ define('KSESTEST_ENV', 'CLI');
+ }
+ else
+ {
+ define('KSESTEST_ENV', 'WEB');
+ }
+
+ if(KSESTEST_VER == 0)
+ {
+ $message = array(
+ "Error: Not using a current version of PHP!",
+ "You are using PHP version " . phpversion() . ".",
+ "KSES Class version requires PHP4 or better.",
+ "KSES test program ending."
+ );
+
+ displayPage(
+ array("title" => "Error running KSES test", "message" => $message)
+ );
+
+ exit();
+ }
+
+ $include_file = "php" . KSESTEST_VER . ".class.kses.php";
+ if(file_exists($include_file) && is_readable($include_file))
+ {
+ include_once($include_file);
+ }
+ else
+ {
+ $message = array(
+ "Error: Unable to find '" . $include_file . "'.",
+ "Please check your include path and make sure the file is available.",
+ "Path: " . ini_get('include_path')
+ );
+
+ displayPage(
+ array('title' => 'Unable to include ' . $include_file, 'message' => $message)
+ );
+
+ exit();
+ }
+
+ $kses_type = "kses" . KSESTEST_VER;
+ $myKses = new $kses_type;
+
+ $test_text = array();
+ $test_text = test1_protocols($myKses);
+ $test_text = array_merge($test_text, test1_html($myKses));
+ $test_text = array_merge($test_text, test1_kses($myKses));
+
+ displayPage(
+ array('title' => 'New Test', 'message' => $test_text)
+ );
+
+ function test1_kses(&$myKses)
+ {
+ $out = array(output_hr(), "Testing current configuration");
+
+ $test_tags = array(
+ '<a href="http://www.chaos.org/">www.chaos.org</a>',
+ '<a name="X">Short \'a name\' tag</a>',
+ '<td colspan="3" rowspan="5">Foo</td>',
+ '<td rowspan="2" class="mugwump" style="background-color: rgb(255, 204 204);">Bar</td>',
+ '<td nowrap>Very Long String running to 1000 characters...</td>',
+ '<td bgcolor="#00ff00" nowrap>Very Long String with a blue background</td>',
+ '<a href="proto1://www.foo.com">New protocol test</a>',
+ '<img src="proto2://www.foo.com" />',
+ '<a href="javascript:javascript:javascript:javascript:javascript:alert(\'Boo!\');">bleep</a>',
+ '<a href="proto4://abc.xyz.foo.com">Another new protocol</a>',
+ '<a href="proto9://foo.foo.foo.foo.foo.org/">Test of "proto9"</a>',
+ '<td width="75">Bar!</td>',
+ '<td width="200">Long Cell</td>'
+ );
+
+ $out_li = array();
+ // Keep only allowed HTML from the presumed 'form'.
+ foreach($test_tags as $tag)
+ {
+ $temp = $myKses->Parse($tag);
+ $check = ($temp == $tag) ? true : false;
+ $text = ($temp == $tag) ? 'pass' : 'fail';
+
+ $li_text = output_testresult($check, $text) . output_newline();
+ $li_text .= "Input: " . output_translate($tag) . output_newline();
+ $li_text .= "Output: " . output_translate($temp);
+ if(KSESTEST_ENV == 'CLI')
+ {
+ $li_text .= output_newline();
+ }
+
+ array_push($out_li, output_code_wrap($li_text));
+ }
+
+ $out = array_merge($out, array(output_ul($out_li)));
+ array_push($out, output_hr());
+ array_push($out, "Testing is now finished.");
+ return $out;
+ }
+
+ function output_code_wrap($text)
+ {
+ if(KSESTEST_ENV == 'CLI')
+ {
+ return $text;
+ }
+ else
+ {
+ return "<code>\n$text<code>\n";
+ }
+ }
+
+ function output_translate($text)
+ {
+ if(KSESTEST_ENV == 'CLI')
+ {
+ return $text;
+ }
+ else
+ {
+ return htmlentities($text);
+ }
+ }
+
+ function output_testresult($pass = false, $text = "")
+ {
+ if(KSESTEST_ENV == 'CLI')
+ {
+ return '[' . $text . ']';
+ }
+ else
+ {
+ if($pass == true)
+ {
+ return '<span style="color: green;">[' . $text . ']</span>';
+ }
+ else
+ {
+ return '<span style="color: red;">[' . $text . ']</span>';
+ }
+ }
+ }
+
+ function output_spaces()
+ {
+ if(KSESTEST_ENV == 'WEB')
+ {
+ $out = " ";
+ }
+ else
+ {
+ $out = " ";
+ }
+
+ return $out;
+ }
+
+ function output_newline()
+ {
+ if(KSESTEST_ENV == 'WEB')
+ {
+ $out = "<br />\n";
+ }
+ else
+ {
+ $out = "\n";
+ }
+
+ return $out;
+ }
+
+ function displayPage($data = array())
+ {
+ $title = ($data['title'] == '') ? 'No title' : $data['title'];
+ $message = ($data['message'] == '') ? array('No message') : $data['message'];
+
+ $out = "";
+
+ foreach($message as $text)
+ {
+ if(KSESTEST_ENV == 'WEB')
+ {
+ $header = "\t\t<h1>$title</h1>\n\t\t<hr />\n";
+ $out .= "\t\t<p>\n";
+ $out .= "\t\t\t$text\n";
+ $out .= "\t\t</p>\n";
+ }
+ else
+ {
+ $header = "$title\n" . str_repeat('-', 60) . "\n\n";
+ $out .= "\t$text\n\n";
+ }
+ }
+
+ if(KSESTEST_ENV == 'WEB')
+ {
+ echo "<html>\n";
+ echo "\t<head>\n";
+ echo "\t\t<title>$title</title>\n";
+ echo "\t</head>\n";
+ echo "\t<body>\n";
+ echo $header;
+ echo $out;
+ echo "\t</body>\n";
+ echo "</html>\n";
+ }
+ else
+ {
+ echo $header;
+ echo $out;
+ }
+ }
+
+ function output_hr()
+ {
+ if(KSESTEST_ENV == 'WEB')
+ {
+ return "\t\t\t<hr />\n";
+ }
+ else
+ {
+ return str_repeat(60, '-') . "\n";
+ }
+ }
+
+ function output_ul($data = array(), $padding = "")
+ {
+ if(!is_array($data) || count($data) < 1)
+ {
+ return "";
+ }
+
+ $text = "";
+ if(KSESTEST_ENV == 'WEB')
+ {
+ $text = "\t\t\t<ul>\n";
+ foreach($data as $li)
+ {
+ $text .= "\t\t\t\t<li>$li</li>\n";
+ }
+ $text .= "\t\t\t</ul>\n";
+ }
+ else
+ {
+ foreach($data as $li)
+ {
+ $text .= $padding . " * $li\n";
+ }
+ }
+
+ return $text;
+ }
+
+ function test1_protocols(&$myKses)
+ {
+ $default_prots = $myKses->dumpProtocols();
+ $out_text = array();
+ if(count($default_prots) > 0)
+ {
+ array_push($out_text, "Initial protocols from KSES" . KSESTEST_VER . ":");
+ array_push($out_text, output_ul($default_prots));
+ array_push($out_text, output_hr());
+ }
+
+ $myKses->AddProtocols(array("proto1", "proto2:", "proto3")); // Add a list of protocols
+ $myKses->AddProtocols("proto4:"); // Add a single protocol (Note ':' is optional at end)
+ $myKses->AddProtocol("proto9", "mystery:", "anarchy");
+ $myKses->AddProtocol("alpha", "beta", "gamma:");
+
+ $add_protocol = "\t\t\t<ol>\n";
+ $add_protocol .= "\t\t\t\t" . '<li>$myKses->AddProtocols(array("proto1", "proto2:", "proto3"));</li>' . "\n";
+ $add_protocol .= "\t\t\t\t" . '<li>$myKses->AddProtocols("proto4:");</li>' . "\n";
+ $add_protocol .= "\t\t\t\t" . '<li>$myKses->AddProtocols("proto4:");</li>' . "\n";
+ $add_protocol .= "\t\t\t\t" . '<li>$myKses->AddProtocol("proto9", "mystery:", "anarchy");</li>' . "\n";
+ $add_protocol .= "\t\t\t\t" . '<li>$myKses->AddProtocol("alpha", "beta", "gamma:");</li>' . "\n";
+ $add_protocol .= "\t\t\t</ol>\n";
+
+ array_push($out_text, $add_protocol);
+
+ $new_prots = $myKses->dumpProtocols();
+ if(count($new_prots) > 0)
+ {
+ array_push($out_text, "New protocols from KSES" . KSESTEST_VER . " after using AddProtocol(s):");
+ array_push($out_text, output_ul($new_prots));
+ array_push($out_text, output_hr());
+ }
+
+ $myKses->RemoveProtocols(array("mystery", "anarchy:"));
+ $myKses->RemoveProtocols("alpha:");
+ $myKses->RemoveProtocol("beta:");
+ $myKses->RemoveProtocol("gamma");
+
+ $remove_protocol = "\t\t\t<ol>\n";
+ $remove_protocol .= "\t\t\t\t" . '<li>$myKses->RemoveProtocols(array("mystery", "anarchy:"));</li>' . "\n";
+ $remove_protocol .= "\t\t\t\t" . '<li>$myKses->RemoveProtocols("alpha:");</li>' . "\n";
+ $remove_protocol .= "\t\t\t\t" . '<li>$myKses->RemoveProtocol("beta:");</li>' . "\n";
+ $remove_protocol .= "\t\t\t\t" . '<li>$myKses->RemoveProtocol("gamma");</li>' . "\n";
+ $remove_protocol .= "\t\t\t</ol>\n";
+ array_push($out_text, $remove_protocol);
+
+ $new_prots = $myKses->dumpProtocols();
+ if(count($new_prots) > 0)
+ {
+ array_push($out_text, "Resulting protocols from KSES" . KSESTEST_VER . " after using RemoveProtocol(s):");
+ array_push($out_text, output_ul($new_prots));
+ array_push($out_text, output_hr());
+ }
+
+ $myKses->SetProtocols(array("https", "gopher", "news"));
+ $set_protocol = "\t\t\t<ol>\n";
+ $set_protocol .= "\t\t\t\t" . '<li>$myKses->SetProtocols(array("https", "gopher", "news"));</li>' . "\n";
+ $set_protocol .= "\t\t\t</ol>\n";
+ array_push($out_text, $set_protocol);
+
+ $new_prots = $myKses->dumpProtocols();
+ if(count($new_prots) > 0)
+ {
+ array_push($out_text, "Resulting protocols from KSES" . KSESTEST_VER . " after using SetProtocols:");
+ array_push($out_text, output_ul($new_prots));
+ array_push($out_text, output_hr());
+ }
+
+ // Invisible reset
+ $myKses->SetProtocols(array("http", "proto1", "proto2", "proto9"));
+
+ return $out_text;
+ }
+
+ function test1_html(&$myKses)
+ {
+ $out = array();
+
+ // Allows <p>|</p> tag
+ $myKses->AddHTML("p");
+
+ // Allows 'a' tag with href|name attributes,
+ // href has minlen of 10 chars, and maxlen of 25 chars
+ // name has minlen of 2 chars
+ $myKses->AddHTML(
+ "a",
+ array(
+ "href" => array('maxlen' => 25, 'minlen' => 10),
+ "name" => array('minlen' => 2)
+ )
+ );
+
+ // Allows 'td' tag with colspan|rowspan|class|style|width|nowrap attributes,
+ // colspan has minval of 2 and maxval of 5
+ // rowspan has minval of 3 and maxval of 6
+ // class has minlen of 1 char and maxlen of 10 chars
+ // style has minlen of 10 chars and maxlen of 100 chars
+ // width has maxval of 100
+ // nowrap is valueless
+ $myKses->AddHTML(
+ "td",
+ array(
+ "colspan" => array('minval' => 2, 'maxval' => 5),
+ "rowspan" => array('minval' => 3, 'maxval' => 6),
+ "class" => array("minlen" => 1, 'maxlen' => 10),
+ "width" => array("maxval" => 100),
+ "style" => array('minlen' => 10, 'maxlen' => 100),
+ "nowrap" => array('valueless' => 'y')
+ )
+ );
+
+ array_push($out, "Modifying HTML Tests:");
+ $code_text = "<pre>\n";
+ $code_text .= " // Allows <p>|</p> tag\n";
+ $code_text .= " \$myKses->AddHTML(\"p\");\n";
+ $code_text .= "\n";
+ $code_text .= " // Allows 'a' tag with href|name attributes,\n";
+ $code_text .= " // href has minlen of 10 chars, and maxlen of 25 chars\n";
+ $code_text .= " // name has minlen of 2 chars\n";
+ $code_text .= " \$myKses->AddHTML(\n";
+ $code_text .= " \"a\",\n";
+ $code_text .= " array(\n";
+ $code_text .= " \"href\" => array('maxlen' => 25, 'minlen' => 10),\n";
+ $code_text .= " \"name\" => array('minlen' => 2)\n";
+ $code_text .= " )\n";
+ $code_text .= " );\n";
+ $code_text .= "\n";
+ $code_text .= " // Allows 'td' tag with colspan|rowspan|class|style|width|nowrap attributes,\n";
+ $code_text .= " // colspan has minval of 2 and maxval of 5\n";
+ $code_text .= " // rowspan has minval of 3 and maxval of 6\n";
+ $code_text .= " // class has minlen of 1 char and maxlen of 10 chars\n";
+ $code_text .= " // style has minlen of 10 chars and maxlen of 100 chars\n";
+ $code_text .= " // width has maxval of 100\n";
+ $code_text .= " // nowrap is valueless\n";
+ $code_text .= " \$myKses->AddHTML(\n";
+ $code_text .= " \"td\",\n";
+ $code_text .= " array(\n";
+ $code_text .= " \"colspan\" => array('minval' => 2, 'maxval' => 5),\n";
+ $code_text .= " \"rowspan\" => array('minval' => 3, 'maxval' => 6),\n";
+ $code_text .= " \"class\" => array(\"minlen\" => 1, 'maxlen' => 10),\n";
+ $code_text .= " \"width\" => array(\"maxval\" => 100),\n";
+ $code_text .= " \"style\" => array('minlen' => 10, 'maxlen' => 100),\n";
+ $code_text .= " \"nowrap\" => array('valueless' => 'y')\n";
+ $code_text .= " )\n";
+ $code_text .= " );\n";
+ $code_text .= "</pre>\n";
+
+ array_push($out, $code_text);
+ array_push($out, output_hr());
+ array_push($out, "Net results:");
+
+ $out_elems = $myKses->DumpElements();
+ if(count($out_elems) > 0)
+ {
+ //array_push($out, "\t\t\t<ul>\n");
+ foreach($out_elems as $tag => $attr_data)
+ {
+ $out_li_elems = array();
+ $elem_text = "(X)HTML element $tag";
+ $allow = "";
+ if(isset($attr_data) && is_array($attr_data) && count($attr_data) > 0)
+ {
+ $allow = " allows attribute";
+ if(count($attr_data) > 1)
+ {
+ $allow .= "s";
+ }
+ $allow .= ":\n";
+ }
+
+ array_push($out_li_elems, "$elem_text$allow");
+
+ $attr_test_li = array();
+ if(isset($attr_data) && is_array($attr_data) && count($attr_data) > 0)
+ {
+ foreach($attr_data as $attr_name => $attr_tests)
+ {
+ $li_text = $attr_name;
+ if(isset($attr_tests) && count($attr_tests) > 0)
+ {
+ foreach($attr_tests as $test_name => $test_val)
+ {
+ switch($test_name)
+ {
+ case "maxlen":
+ $li_text .= " - maximum length of '" . $test_val . "' characters";
+ break;
+ case "minlen":
+ $li_text .= " - minimum length of '" . $test_val . "' characters";
+ break;
+ case "minval":
+ $li_text .= " - minimum value of '" . $test_val . "'";
+ break;
+ case "maxval":
+ $li_text .= " - maximum value of '" . $test_val . "'";
+ break;
+ case "valueless":
+ switch(strtolower($test_val))
+ {
+ case 'n':
+ $li_text .= " - must not be valueless";
+ break;
+ case 'y':
+ $li_text .= " - must be valueless";
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ array_push($attr_test_li, $li_text);
+ }
+ if(count($attr_test_li) > 0)
+ {
+ $attr_test_li = output_ul($attr_test_li, " ");
+ $out_li_elems = array("$elem_text$allow$attr_test_li");
+ }
+ }
+ $out = array_merge($out, $out_li_elems);
+ }
+ }
+
+ return $out;
+ }
+
+?>
\ No newline at end of file |