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* API: upgrade to purifier Version 4.3.0; reintroduce rev32909 (myStylite ticket#987: fixing a problem regarding chopped off urls when URI in question contains umlauts AND mbstring.func_overload is activated); add missing files

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phpgwapi/inc/htmlpurifier/INSTALL Executable file
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Install
How to install HTML Purifier
HTML Purifier is designed to run out of the box, so actually using the
library is extremely easy. (Although... if you were looking for a
step-by-step installation GUI, you've downloaded the wrong software!)
While the impatient can get going immediately with some of the sample
code at the bottom of this library, it's well worth reading this entire
document--most of the other documentation assumes that you are familiar
with these contents.
---------------------------------------------------------------------------
1. Compatibility
HTML Purifier is PHP 5 only, and is actively tested from PHP 5.0.5 and
up. It has no core dependencies with other libraries. PHP
4 support was deprecated on December 31, 2007 with HTML Purifier 3.0.0.
HTML Purifier is not compatible with zend.ze1_compatibility_mode.
These optional extensions can enhance the capabilities of HTML Purifier:
* iconv : Converts text to and from non-UTF-8 encodings
* bcmath : Used for unit conversion and imagecrash protection
* tidy : Used for pretty-printing HTML
---------------------------------------------------------------------------
2. Reconnaissance
A big plus of HTML Purifier is its inerrant support of standards, so
your web-pages should be standards-compliant. (They should also use
semantic markup, but that's another issue altogether, one HTML Purifier
cannot fix without reading your mind.)
HTML Purifier can process these doctypes:
* XHTML 1.0 Transitional (default)
* XHTML 1.0 Strict
* HTML 4.01 Transitional
* HTML 4.01 Strict
* XHTML 1.1
...and these character encodings:
* UTF-8 (default)
* Any encoding iconv supports (with crippled internationalization support)
These defaults reflect what my choices would be if I were authoring an
HTML document, however, what you choose depends on the nature of your
codebase. If you don't know what doctype you are using, you can determine
the doctype from this identifier at the top of your source code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
...and the character encoding from this code:
<meta http-equiv="Content-type" content="text/html;charset=ENCODING">
If the character encoding declaration is missing, STOP NOW, and
read 'docs/enduser-utf8.html' (web accessible at
http://htmlpurifier.org/docs/enduser-utf8.html). In fact, even if it is
present, read this document anyway, as many websites specify their
document's character encoding incorrectly.
---------------------------------------------------------------------------
3. Including the library
The procedure is quite simple:
require_once '/path/to/library/HTMLPurifier.auto.php';
This will setup an autoloader, so the library's files are only included
when you use them.
Only the contents in the library/ folder are necessary, so you can remove
everything else when using HTML Purifier in a production environment.
If you installed HTML Purifier via PEAR, all you need to do is:
require_once 'HTMLPurifier.auto.php';
Please note that the usual PEAR practice of including just the classes you
want will not work with HTML Purifier's autoloading scheme.
Advanced users, read on; other users can skip to section 4.
Autoload compatibility
----------------------
HTML Purifier attempts to be as smart as possible when registering an
autoloader, but there are some cases where you will need to change
your own code to accomodate HTML Purifier. These are those cases:
PHP VERSION IS LESS THAN 5.1.2, AND YOU'VE DEFINED __autoload
Because spl_autoload_register() doesn't exist in early versions
of PHP 5, HTML Purifier has no way of adding itself to the autoload
stack. Modify your __autoload function to test
HTMLPurifier_Bootstrap::autoload($class)
For example, suppose your autoload function looks like this:
function __autoload($class) {
require str_replace('_', '/', $class) . '.php';
return true;
}
A modified version with HTML Purifier would look like this:
function __autoload($class) {
if (HTMLPurifier_Bootstrap::autoload($class)) return true;
require str_replace('_', '/', $class) . '.php';
return true;
}
Note that there *is* some custom behavior in our autoloader; the
original autoloader in our example would work for 99% of the time,
but would fail when including language files.
AN __autoload FUNCTION IS DECLARED AFTER OUR AUTOLOADER IS REGISTERED
spl_autoload_register() has the curious behavior of disabling
the existing __autoload() handler. Users need to explicitly
spl_autoload_register('__autoload'). Because we use SPL when it
is available, __autoload() will ALWAYS be disabled. If __autoload()
is declared before HTML Purifier is loaded, this is not a problem:
HTML Purifier will register the function for you. But if it is
declared afterwards, it will mysteriously not work. This
snippet of code (after your autoloader is defined) will fix it:
spl_autoload_register('__autoload')
Users should also be on guard if they use a version of PHP previous
to 5.1.2 without an autoloader--HTML Purifier will define __autoload()
for you, which can collide with an autoloader that was added by *you*
later.
For better performance
----------------------
Opcode caches, which greatly speed up PHP initialization for scripts
with large amounts of code (HTML Purifier included), don't like
autoloaders. We offer an include file that includes all of HTML Purifier's
files in one go in an opcode cache friendly manner:
// If /path/to/library isn't already in your include path, uncomment
// the below line:
// require '/path/to/library/HTMLPurifier.path.php';
require 'HTMLPurifier.includes.php';
Optional components still need to be included--you'll know if you try to
use a feature and you get a class doesn't exists error! The autoloader
can be used in conjunction with this approach to catch classes that are
missing. Simply add this afterwards:
require 'HTMLPurifier.autoload.php';
Standalone version
------------------
HTML Purifier has a standalone distribution; you can also generate
a standalone file from the full version by running the script
maintenance/generate-standalone.php . The standalone version has the
benefit of having most of its code in one file, so parsing is much
faster and the library is easier to manage.
If HTMLPurifier.standalone.php exists in the library directory, you
can use it like this:
require '/path/to/HTMLPurifier.standalone.php';
This is equivalent to including HTMLPurifier.includes.php, except that
the contents of standalone/ will be added to your path. To override this
behavior, specify a new HTMLPURIFIER_PREFIX where standalone files can
be found (usually, this will be one directory up, the "true" library
directory in full distributions). Don't forget to set your path too!
The autoloader can be added to the end to ensure the classes are
loaded when necessary; otherwise you can manually include them.
To use the autoloader, use this:
require 'HTMLPurifier.autoload.php';
For advanced users
------------------
HTMLPurifier.auto.php performs a number of operations that can be done
individually. These are:
HTMLPurifier.path.php
Puts /path/to/library in the include path. For high performance,
this should be done in php.ini.
HTMLPurifier.autoload.php
Registers our autoload handler HTMLPurifier_Bootstrap::autoload($class).
You can do these operations by yourself--in fact, you must modify your own
autoload handler if you are using a version of PHP earlier than PHP 5.1.2
(See "Autoload compatibility" above).
---------------------------------------------------------------------------
4. Configuration
HTML Purifier is designed to run out-of-the-box, but occasionally HTML
Purifier needs to be told what to do. If you answer no to any of these
questions, read on; otherwise, you can skip to the next section (or, if you're
into configuring things just for the heck of it, skip to 4.3).
* Am I using UTF-8?
* Am I using XHTML 1.0 Transitional?
If you answered no to any of these questions, instantiate a configuration
object and read on:
$config = HTMLPurifier_Config::createDefault();
4.1. Setting a different character encoding
You really shouldn't use any other encoding except UTF-8, especially if you
plan to support multilingual websites (read section three for more details).
However, switching to UTF-8 is not always immediately feasible, so we can
adapt.
HTML Purifier uses iconv to support other character encodings, as such,
any encoding that iconv supports <http://www.gnu.org/software/libiconv/>
HTML Purifier supports with this code:
$config->set('Core.Encoding', /* put your encoding here */);
An example usage for Latin-1 websites (the most common encoding for English
websites):
$config->set('Core.Encoding', 'ISO-8859-1');
Note that HTML Purifier's support for non-Unicode encodings is crippled by the
fact that any character not supported by that encoding will be silently
dropped, EVEN if it is ampersand escaped. If you want to work around
this, you are welcome to read docs/enduser-utf8.html for a fix,
but please be cognizant of the issues the "solution" creates (for this
reason, I do not include the solution in this document).
4.2. Setting a different doctype
For those of you using HTML 4.01 Transitional, you can disable
XHTML output like this:
$config->set('HTML.Doctype', 'HTML 4.01 Transitional');
Other supported doctypes include:
* HTML 4.01 Strict
* HTML 4.01 Transitional
* XHTML 1.0 Strict
* XHTML 1.0 Transitional
* XHTML 1.1
4.3. Other settings
There are more configuration directives which can be read about
here: <http://htmlpurifier.org/live/configdoc/plain.html> They're a bit boring,
but they can help out for those of you who like to exert maximum control over
your code. Some of the more interesting ones are configurable at the
demo <http://htmlpurifier.org/demo.php> and are well worth looking into
for your own system.
For example, you can fine tune allowed elements and attributes, convert
relative URLs to absolute ones, and even autoparagraph input text! These
are, respectively, %HTML.Allowed, %URI.MakeAbsolute and %URI.Base, and
%AutoFormat.AutoParagraph. The %Namespace.Directive naming convention
translates to:
$config->set('Namespace.Directive', $value);
E.g.
$config->set('HTML.Allowed', 'p,b,a[href],i');
$config->set('URI.Base', 'http://www.example.com');
$config->set('URI.MakeAbsolute', true);
$config->set('AutoFormat.AutoParagraph', true);
---------------------------------------------------------------------------
5. Caching
HTML Purifier generates some cache files (generally one or two) to speed up
its execution. For maximum performance, make sure that
library/HTMLPurifier/DefinitionCache/Serializer is writeable by the webserver.
If you are in the library/ folder of HTML Purifier, you can set the
appropriate permissions using:
chmod -R 0755 HTMLPurifier/DefinitionCache/Serializer
If the above command doesn't work, you may need to assign write permissions
to all. This may be necessary if your webserver runs as nobody, but is
not recommended since it means any other user can write files in the
directory. Use:
chmod -R 0777 HTMLPurifier/DefinitionCache/Serializer
You can also chmod files via your FTP client; this option
is usually accessible by right clicking the corresponding directory and
then selecting "chmod" or "file permissions".
Starting with 2.0.1, HTML Purifier will generate friendly error messages
that will tell you exactly what you have to chmod the directory to, if in doubt,
follow its advice.
If you are unable or unwilling to give write permissions to the cache
directory, you can either disable the cache (and suffer a performance
hit):
$config->set('Core.DefinitionCache', null);
Or move the cache directory somewhere else (no trailing slash):
$config->set('Cache.SerializerPath', '/home/user/absolute/path');
---------------------------------------------------------------------------
6. Using the code
The interface is mind-numbingly simple:
$purifier = new HTMLPurifier();
$clean_html = $purifier->purify( $dirty_html );
...or, if you're using the configuration object:
$purifier = new HTMLPurifier($config);
$clean_html = $purifier->purify( $dirty_html );
That's it! For more examples, check out docs/examples/ (they aren't very
different though). Also, docs/enduser-slow.html gives advice on what to
do if HTML Purifier is slowing down your application.
---------------------------------------------------------------------------
7. Quick install
First, make sure library/HTMLPurifier/DefinitionCache/Serializer is
writable by the webserver (see Section 5: Caching above for details).
If your website is in UTF-8 and XHTML Transitional, use this code:
<?php
require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';
$purifier = new HTMLPurifier();
$clean_html = $purifier->purify($dirty_html);
?>
If your website is in a different encoding or doctype, use this code:
<?php
require_once '/path/to/htmlpurifier/library/HTMLPurifier.auto.php';
$config = HTMLPurifier_Config::createDefault();
$config->set('Core.Encoding', 'ISO-8859-1'); // replace with your encoding
$config->set('HTML.Doctype', 'HTML 4.01 Transitional'); // replace with your doctype
$purifier = new HTMLPurifier($config);
$clean_html = $purifier->purify($dirty_html);
?>
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NEWS ( CHANGELOG and HISTORY ) HTMLPurifier
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
= KEY ====================
# Breaks back-compat
! Feature
- Bugfix
+ Sub-comment
. Internal change
==========================
4.3.0, released 2011-03-27
# Fixed broken caching of customized raw definitions, but requires an
API change. The old API still works but will emit a warning,
see http://htmlpurifier.org/docs/enduser-customize.html#optimized
for how to upgrade your code.
# Protect against Internet Explorer innerHTML behavior by specially
treating attributes with backticks but no angled brackets, quotes or
spaces. This constitutes a slight semantic change, which can be
reverted using %Output.FixInnerHTML. Reported by Neike Taika-Tessaro
and Mario Heiderich.
# Protect against cssText/innerHTML by restricting allowed characters
used in fonts further than mandated by the specification and encoding
some extra special characters in URLs. Reported by Neike
Taika-Tessaro and Mario Heiderich.
! Added %HTML.Nofollow to add rel="nofollow" to external links.
! More types of SPL autoloaders allowed on later versions of PHP.
! Implementations for position, top, left, right, bottom, z-index
when %CSS.Trusted is on.
! Add %Cache.SerializerPermissions option for custom serializer
directory/file permissions
! Fix longstanding bug in Flash support for non-IE browsers, and
allow more wmode attributes.
! Add %CSS.AllowedFonts to restrict permissible font names.
- Switch to an iterative traversal of the DOM, which prevents us
from running out of stack space for deeply nested documents.
Thanks Maxim Krizhanovsky for contributing a patch.
- Make removal of conditional IE comments ungreedy; thanks Bernd
for reporting.
- Escape CDATA before removing Internet Explorer comments.
- Fix removal of id attributes under certain conditions by ensuring
armor attributes are preserved when recreating tags.
- Check if schema.ser was corrupted.
- Check if zend.ze1_compatibility_mode is on, and error out if it is.
This safety check is only done for HTMLPurifier.auto.php; if you
are using standalone or the specialized includes files, you're
expected to know what you're doing.
- Stop repeatedly writing the cache file after I'm done customizing a
raw definition. Reported by ajh.
- Switch to using require_once in the Bootstrap to work around bad
interaction with Zend Debugger and APC. Reported by Antonio Parraga.
- Fix URI handling when hostname is missing but scheme is present.
Reported by Neike Taika-Tessaro.
- Fix missing numeric entities on DirectLex; thanks Neike Taika-Tessaro
for reporting.
- Fix harmless notice from indexing into empty string. Thanks Matthijs
Kooijman <matthijs@stdin.nl> for reporting.
- Don't autoclose no parent elements are able to support the element
that triggered the autoclose. In particular fixes strange behavior
of stray <li> tags. Thanks pkuliga@gmail.com for reporting and
Neike Taika-Tessaro <pinkgothic@gmail.com> for debugging assistance.
4.2.0, released 2010-09-15
! Added %Core.RemoveProcessingInstructions, which lets you remove
<? ... ?> statements.
! Added %URI.DisableResources functionality; the directive originally
did nothing. Thanks David Rothstein for reporting.
! Add documentation about configuration directive types.
! Add %CSS.ForbiddenProperties configuration directive.
! Add %HTML.FlashAllowFullScreen to permit embedded Flash objects
to utilize full-screen mode.
! Add optional support for the <code>file</code> URI scheme, enable
by explicitly setting %URI.AllowedSchemes.
! Add %Core.NormalizeNewlines options to allow turning off newline
normalization.
- Fix improper handling of Internet Explorer conditional comments
by parser. Thanks zmonteca for reporting.
- Fix missing attributes bug when running on Mac Snow Leopard and APC.
Thanks sidepodcast for the fix.
- Warn if an element is allowed, but an attribute it requires is
not allowed.
4.1.1, released 2010-05-31
- Fix undefined index warnings in maintenance scripts.
- Fix bug in DirectLex for parsing elements with a single attribute
with entities.
- Rewrite CSS output logic for font-family and url(). Thanks Mario
Heiderich <mario.heiderich@googlemail.com> for reporting and Takeshi
Terada <t-terada@violet.plala.or.jp> for suggesting the fix.
- Emit an error for CollectErrors if a body is extracted
- Fix bug where in background-position for center keyword handling.
- Fix infinite loop when a wrapper element is inserted in a context
where it's not allowed. Thanks Lars <lars@renoz.dk> for reporting.
- Remove +x bit and shebang from index.php; only supported mode is to
explicitly call it with php.
- Make test script less chatty when log_errors is on.
4.1.0, released 2010-04-26
! Support proprietary height attribute on table element
! Support YouTube slideshows that contain /cp/ in their URL.
! Support for data: URI scheme; not enabled by default, add it using
%URI.AllowedSchemes
! Support flashvars when using %HTML.SafeObject and %HTML.SafeEmbed.
! Support for Internet Explorer compatibility with %HTML.SafeObject
using %Output.FlashCompat.
! Handle <ol><ol> properly, by inserting the necessary <li> tag.
- Always quote the insides of url(...) in CSS.
4.0.0, released 2009-07-07
# APIs for ConfigSchema subsystem have substantially changed. See
docs/dev-config-bcbreaks.txt for details; in essence, anything that
had both namespace and directive now have a single unified key.
# Some configuration directives were renamed, specifically:
%AutoFormatParam.PurifierLinkifyDocURL -> %AutoFormat.PurifierLinkify.DocURL
%FilterParam.ExtractStyleBlocksEscaping -> %Filter.ExtractStyleBlocks.Escaping
%FilterParam.ExtractStyleBlocksScope -> %Filter.ExtractStyleBlocks.Scope
%FilterParam.ExtractStyleBlocksTidyImpl -> %Filter.ExtractStyleBlocks.TidyImpl
As usual, the old directive names will still work, but will throw E_NOTICE
errors.
# The allowed values for class have been relaxed to allow all of CDATA for
doctypes that are not XHTML 1.1 or XHTML 2.0. For old behavior, set
%Attr.ClassUseCDATA to false.
# Instead of appending the content model to an old content model, a blank
element will replace the old content model. You can use #SUPER to get
the old content model.
! More robust support for name="" and id=""
! HTMLPurifier_Config::inherit($config) allows you to inherit one
configuration, and have changes to that configuration be propagated
to all of its children.
! Implement %HTML.Attr.Name.UseCDATA, which relaxes validation rules on
the name attribute when set. Use with care. Thanks Ian Cook for
sponsoring.
! Implement %AutoFormat.RemoveEmpty.RemoveNbsp, which removes empty
tags that contain non-breaking spaces as well other whitespace. You
can also modify which tags should have &nbsp; maintained with
%AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions.
! Implement %Attr.AllowedClasses, which allows administrators to restrict
classes users can use to a specified finite set of classes, and
%Attr.ForbiddenClasses, which is the logical inverse.
! You can now maintain your own configuration schema directories by
creating a config-schema.php file or passing an extra argument. Check
docs/dev-config-schema.html for more details.
! Added HTMLPurifier_Config->serialize() method, which lets you save away
your configuration in a compact serial file, which you can unserialize
and use directly without having to go through the overhead of setup.
- Fix bug where URIDefinition would not get cleared if it's directives got
changed.
- Fix fatal error in HTMLPurifier_Encoder on certain platforms (probably NetBSD 5.0)
- Fix bug in Linkify autoformatter involving <a><span>http://foo</span></a>
- Make %URI.Munge not apply to links that have the same host as your host.
- Prevent stray </body> tag from truncating output, if a second </body>
is present.
. Created script maintenance/rename-config.php for renaming a configuration
directive while maintaining its alias. This script does not change source code.
. Implement namespace locking for definition construction, to prevent
bugs where a directive is used for definition construction but is not
used to construct the cache hash.
3.3.0, released 2009-02-16
! Implement CSS property 'overflow' when %CSS.AllowTricky is true.
! Implement generic property list classess
- Fix bug with testEncodingSupportsASCII() algorithm when iconv() implementation
does not do the "right thing" with characters not supported in the output
set.
- Spellcheck UTF-8: The Secret To Character Encoding
- Fix improper removal of the contents of elements with only whitespace. Thanks
Eric Wald for reporting.
- Fix broken test suite in versions of PHP without spl_autoload_register()
- Fix degenerate case with YouTube filter involving double hyphens.
Thanks Pierre Attar for reporting.
- Fix YouTube rendering problem on certain versions of Firefox.
- Fix CSSDefinition Printer problems with decorators
- Add text parameter to unit tests, forces text output
. Add verbose mode to command line test runner, use (--verbose)
. Turn on unit tests for UnitConverter
. Fix missing version number in configuration %Attr.DefaultImageAlt (added 3.2.0)
. Fix newline errors that caused spurious failures when CRLF HTML Purifier was
tested on Linux.
. Removed trailing whitespace from all text files, see
remote-trailing-whitespace.php maintenance script.
. Convert configuration to use property list backend.
3.2.0, released 2008-10-31
# Using %Core.CollectErrors forces line number/column tracking on, whereas
previously you could theoretically turn it off.
# HTMLPurifier_Injector->notifyEnd() is formally deprecated. Please
use handleEnd() instead.
! %Output.AttrSort for when you need your attributes in alphabetical order to
deal with a bug in FCKEditor. Requested by frank farmer.
! Enable HTML comments when %HTML.Trusted is on. Requested by Waldo Jaquith.
! Proper support for name attribute. It is now allowed and equivalent to the id
attribute in a and img tags, and is only converted to id when %HTML.TidyLevel
is heavy (for all doctypes).
! %AutoFormat.RemoveEmpty to remove some empty tags from documents. Please don't
use on hand-written HTML.
! Add error-cases for unsupported elements in MakeWellFormed. This enables
the strategy to be used, standalone, on untrusted input.
! %Core.AggressivelyFixLt is on by default. This causes more sensible
processing of left angled brackets in smileys and other whatnot.
! Test scripts now have a 'type' parameter, which lets you say 'htmlpurifier',
'phpt', 'vtest', etc. in order to only execute those tests. This supercedes
the --only-phpt parameter, although for backwards-compatibility the flag
will still work.
! AutoParagraph auto-formatter will now preserve double-newlines upon output.
Users who are not performing inbound filtering, this may seem a little
useless, but as a bonus, the test suite and handling of edge cases is also
improved.
! Experimental implementation of forms for %HTML.Trusted
! Track column numbers when maintain line numbers is on
! Proprietary 'background' attribute on table-related elements converted into
corresponding CSS. Thanks Fusemail for sponsoring this feature!
! Add forward(), forwardUntilEndToken(), backward() and current() to Injector
supertype.
! HTMLPurifier_Injector->handleEnd() permits modification to end tokens. The
time of operation varies slightly from notifyEnd() as *all* end tokens are
processed by the injector before they are subject to the well-formedness rules.
! %Attr.DefaultImageAlt allows overriding default behavior of setting alt to
basename of image when not present.
! %AutoFormat.DisplayLinkURI neuters <a> tags into plain text URLs.
- Fix two bugs in %URI.MakeAbsolute; one involving empty paths in base URLs,
the other involving an undefined $is_folder error.
- Throw error when %Core.Encoding is set to a spurious value. Previously,
this errored silently and returned false.
- Redirected stderr to stdout for flush error output.
- %URI.DisableExternal will now use the host in %URI.Base if %URI.Host is not
available.
- Do not re-munge URL if the output URL has the same host as the input URL.
Requested by Chris.
- Fix error in documentation regarding %Filter.ExtractStyleBlocks
- Prevent <![CDATA[<body></body>]]> from triggering %Core.ConvertDocumentToFragment
- Fix bug with inline elements in blockquotes conflicting with strict doctype
- Detect if HTML support is disabled for DOM by checking for loadHTML() method.
- Fix bug where dots and double-dots in absolute URLs without hostname were
not collapsed by URIFilter_MakeAbsolute.
- Fix bug with anonymous modules operating on SafeEmbed or SafeObject elements
by reordering their addition.
- Will now throw exception on many error conditions during lexer creation; also
throw an exception when MaintainLineNumbers is true, but a non-tracksLineNumbers
is being used.
- Detect if domxml extension is loaded, and use DirectLEx accordingly.
- Improve handling of big numbers with floating point arithmetic in UnitConverter.
Reported by David Morton.
. Strategy_MakeWellFormed now operates in-place, saving memory and allowing
for more interesting filter-backtracking
. New HTMLPurifier_Injector->rewind() functionality, allows injectors to rewind
index to reprocess tokens.
. StringHashParser now allows for multiline sections with "empty" content;
previously the section would remain undefined.
. Added --quick option to multitest.php, which tests only the most recent
release for each series.
. Added --distro option to multitest.php, which accepts either 'normal' or
'standalone'. This supercedes --exclude-normal and --exclude-standalone
3.1.1, released 2008-06-19
# %URI.Munge now, by default, does not munge resources (for example, <img src="">)
In order to enable this again, please set %URI.MungeResources to true.
! More robust imagecrash protection with height/width CSS with %CSS.MaxImgLength,
and height/width HTML with %HTML.MaxImgLength.
! %URI.MungeSecretKey for secure URI munging. Thanks Chris
for sponsoring this feature. Check out the corresponding documentation
for details. (Att Nightly testers: The API for this feature changed before
the general release. Namely, rename your directives %URI.SecureMungeSecretKey =>
%URI.MungeSecretKey and and %URI.SecureMunge => %URI.Munge)
! Implemented post URI filtering. Set member variable $post to true to set
a URIFilter as such.
! Allow modules to define injectors via $info_injector. Injectors are
automatically disabled if injector's needed elements are not found.
! Support for "safe" objects added, use %HTML.SafeObject and %HTML.SafeEmbed.
Thanks Chris for sponsoring. If you've been using ad hoc code from the
forums, PLEASE use this instead.
! Added substitutions for %e, %n, %a and %p in %URI.Munge (in order,
embedded, tag name, attribute name, CSS property name). See %URI.Munge
for more details. Requested by Jochem Blok.
- Disable percent height/width attributes for img.
- AttrValidator operations are now atomic; updates to attributes are not
manifest in token until end of operations. This prevents naughty internal
code from directly modifying CurrentToken when they're not supposed to.
This semantics change was requested by frank farmer.
- Percent encoding checks enabled for URI query and fragment
- Fix stray backslashes in font-family; CSS Unicode character escapes are
now properly resolved (although *only* in font-family). Thanks Takeshi Terada
for reporting.
- Improve parseCDATA algorithm to take into account newline normalization
- Account for browser confusion between Yen character and backslash in
Shift_JIS encoding. This fix generalizes to any other encoding which is not
a strict superset of printable ASCII. Thanks Takeshi Terada for reporting.
- Fix missing configuration parameter in Generator calls. Thanks vs for the
partial patch.
- Improved adherence to Unicode by checking for non-character codepoints.
Thanks Geoffrey Sneddon for reporting. This may result in degraded
performance for extremely large inputs.
- Allow CSS property-value pair ''text-decoration: none''. Thanks Jochem Blok
for reporting.
. Added HTMLPurifier_UnitConverter and HTMLPurifier_Length for convenient
handling of CSS-style lengths. HTMLPurifier_AttrDef_CSS_Length now uses
this class.
. API of HTMLPurifier_AttrDef_CSS_Length changed from __construct($disable_negative)
to __construct($min, $max). __construct(true) is equivalent to
__construct('0').
. Added HTMLPurifier_AttrDef_Switch class
. Rename HTMLPurifier_HTMLModule_Tidy->construct() to setup() and bubble method
up inheritance hierarchy to HTMLPurifier_HTMLModule. All HTMLModules
get this called with the configuration object. All modules now
use this rather than __construct(), although legacy code using constructors
will still work--the new format, however, lets modules access the
configuration object for HTML namespace dependant tweaks.
. AttrDef_HTML_Pixels now takes a single construction parameter, pixels.
. ConfigSchema data-structure heavily optimized; on average it uses a third
the memory it did previously. The interface has changed accordingly,
consult changes to HTMLPurifier_Config for details.
. Variable parsing types now are magic integers instead of strings
. Added benchmark for ConfigSchema
. HTMLPurifier_Generator requires $config and $context parameters. If you
don't know what they should be, use HTMLPurifier_Config::createDefault()
and new HTMLPurifier_Context().
. Printers now properly distinguish between output configuration, and
target configuration. This is not applicable to scripts using
the Printers for HTML Purifier related tasks.
. HTML/CSS Printers must be primed with prepareGenerator($gen_config), otherwise
fatal errors will ensue.
. URIFilter->prepare can return false in order to abort loading of the filter
. Factory for AttrDef_URI implemented, URI#embedded to indicate URI that embeds
an external resource.
. %URI.Munge functionality factored out into a post-filter class.
. Added CurrentCSSProperty context variable during CSS validation
3.1.0, released 2008-05-18
# Unnecessary references to objects (vestiges of PHP4) removed from method
signatures. The following methods do not need references when assigning from
them and will result in E_STRICT errors if you try:
+ HTMLPurifier_Config->get*Definition() [* = HTML, CSS]
+ HTMLPurifier_ConfigSchema::instance()
+ HTMLPurifier_DefinitionCacheFactory::instance()
+ HTMLPurifier_DefinitionCacheFactory->create()
+ HTMLPurifier_DoctypeRegistry->register()
+ HTMLPurifier_DoctypeRegistry->get()
+ HTMLPurifier_HTMLModule->addElement()
+ HTMLPurifier_HTMLModule->addBlankElement()
+ HTMLPurifier_LanguageFactory::instance()
# Printer_ConfigForm's get*() functions were static-ified
# %HTML.ForbiddenAttributes requires attribute declarations to be in the
form of tag@attr, NOT tag.attr (which will throw an error and won't do
anything). This is for forwards compatibility with XML; you'd do best
to migrate an %HTML.AllowedAttributes directives to this syntax too.
! Allow index to be false for config from form creation
! Added HTMLPurifier::VERSION constant
! Commas, not dashes, used for serializer IDs. This change is forwards-compatible
and allows for version numbers like "3.1.0-dev".
! %HTML.Allowed deals gracefully with whitespace anywhere, anytime!
! HTML Purifier's URI handling is a lot more robust, with much stricter
validation checks and better percent encoding handling. Thanks Gareth Heyes
for indicating security vulnerabilities from lax percent encoding.
! Bootstrap autoloader deals more robustly with classes that don't exist,
preventing class_exists($class, true) from barfing.
- InterchangeBuilder now alphabetizes its lists
- Validation error in configdoc output fixed
- Iconv and other encoding errors muted even with custom error handlers that
do not honor error_reporting
- Add protection against imagecrash attack with CSS height/width
- HTMLPurifier::instance() created for consistency, is equivalent to getInstance()
- Fixed and revamped broken ConfigForm smoketest
- Bug with bool/null fields in Printer_ConfigForm fixed
- Bug with global forbidden attributes fixed
- Improved error messages for allowed and forbidden HTML elements and attributes
- Missing (or null) in configdoc documentation restored
- If DOM throws and exception during parsing with PH5P (occurs in newer versions
of DOM), HTML Purifier punts to DirectLex
- Fatal error with unserialization of ScriptRequired
- Created directories are now chmod'ed properly
- Fixed bug with fallback languages in LanguageFactory
- Standalone testing setup properly with autoload
. Out-of-date documentation revised
. UTF-8 encoding check optimization as suggested by Diego
. HTMLPurifier_Error removed in favor of exceptions
. More copy() function removed; should use clone instead
. More extensive unit tests for HTMLDefinition
. assertPurification moved to central harness
. HTMLPurifier_Generator accepts $config and $context parameters during
instantiation, not runtime
. Double-quotes outside of attribute values are now unescaped
3.1.0rc1, released 2008-04-22
# Autoload support added. Internal require_once's removed in favor of an
explicit require list or autoloading. To use HTML Purifier,
you must now either use HTMLPurifier.auto.php
or HTMLPurifier.includes.php; setting the include path and including
HTMLPurifier.php is insufficient--in such cases include HTMLPurifier.autoload.php
as well to register our autoload handler (or modify your autoload function
to check HTMLPurifier_Bootstrap::getPath($class)). You can also use
HTMLPurifier.safe-includes.php for a less performance friendly but more
user-friendly library load.
# HTMLPurifier_ConfigSchema static functions are officially deprecated. Schema
information is stored in the ConfigSchema directory, and the
maintenance/generate-schema-cache.php generates the schema.ser file, which
is now instantiated. Support for userland schema changes coming soon!
# HTMLPurifier_Config will now throw E_USER_NOTICE when you use a directive
alias; to get rid of these errors just modify your configuration to use
the new directive name.
# HTMLPurifier->addFilter is deprecated; built-in filters can now be
enabled using %Filter.$filter_name or by setting your own filters using
%Filter.Custom
# Directive-level safety properties superceded in favor of module-level
safety. Internal method HTMLModule->addElement() has changed, although
the externally visible HTMLDefinition->addElement has *not* changed.
! Extra utility classes for testing and non-library operations can
be found in extras/. Specifically, these are FSTools and ConfigDoc.
You may find a use for these in your own project, but right now they
are highly experimental and volatile.
! Integration with PHPT allows for automated smoketests
! Limited support for proprietary HTML elements, namely <marquee>, sponsored
by Chris. You can enable them with %HTML.Proprietary if your client
demands them.
! Support for !important CSS cascade modifier. By default, this will be stripped
from CSS, but you can enable it using %CSS.AllowImportant
! Support for display and visibility CSS properties added, set %CSS.AllowTricky
to true to use them.
! HTML Purifier now has its own Exception hierarchy under HTMLPurifier_Exception.
Developer error (not enduser error) can cause these to be triggered.
! Experimental kses() wrapper introduced with HTMLPurifier.kses.php
! Finally %CSS.AllowedProperties for tweaking allowed CSS properties without
mucking around with HTMLPurifier_CSSDefinition
! ConfigDoc output has been enhanced with version and deprecation info.
! %HTML.ForbiddenAttributes and %HTML.ForbiddenElements implemented.
- Autoclose now operates iteratively, i.e. <span><span><div> now has
both span tags closed.
- Various HTMLPurifier_Config convenience functions now accept another parameter
$schema which defines what HTMLPurifier_ConfigSchema to use besides the
global default.
- Fix bug with trusted script handling in libxml versions later than 2.6.28.
- Fix bug in ExtractStyleBlocks with comments in style tags
- Fix bug in comment parsing for DirectLex
- Flush output now displayed when in command line mode for unit tester
- Fix bug with rgb(0, 1, 2) color syntax with spaces inside shorthand syntax
- HTMLPurifier_HTMLDefinition->addAttribute can now be called multiple times
on the same element without emitting errors.
- Fixed fatal error in PH5P lexer with invalid tag names
. Plugins now get their own changelogs according to project conventions.
. Convert tokens to use instanceof, reducing memory footprint and
improving comparison speed.
. Dry runs now supported in SimpleTest; testing facilities improved
. Bootstrap class added for handling autoloading functionality
. Implemented recursive glob at FSTools->globr
. ConfigSchema now has instance methods for all corresponding define*
static methods.
. A couple of new historical maintenance scripts were added.
. HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php split into two files
. tests/index.php can now be run from any directory.
. HTMLPurifier_Token subclasses split into seperate files
. HTMLPURIFIER_PREFIX now is defined in Bootstrap.php, NOT HTMLPurifier.php
. HTMLPURIFIER_PREFIX can now be defined outside of HTML Purifier
. New --php=php flag added, allows PHP executable to be specified (command
line only!)
. htmlpurifier_add_test() preferred method to translate test files in to
classes, because it handles PHPT files too.
. Debugger class is deprecated and will be removed soon.
. Command line argument parsing for testing scripts revamped, now --opt value
format is supported.
. Smoketests now cleanup after magic quotes
. Generator now can output comments (however, comments are still stripped
from HTML Purifier output)
. HTMLPurifier_ConfigSchema->validate() deprecated in favor of
HTMLPurifier_VarParser->parse()
. Integers auto-cast into float type by VarParser.
. HTMLPURIFIER_STRICT removed; no validation is performed on runtime, only
during cache generation
. Reordered script calls in maintenance/flush.php
. Command line scripts now honor exit codes
. When --flush fails in unit testers, abort tests and print message
. Improved documentation in docs/dev-flush.html about the maintenance scripts
. copy() methods removed in favor of clone keyword
3.0.0, released 2008-01-06
# HTML Purifier is PHP 5 only! The 2.1.x branch will be maintained
until PHP 4 is completely deprecated, but no new features will be added
to it.
+ Visibility declarations added
+ Constructor methods renamed to __construct()
+ PHP4 reference cruft removed (in progress)
! CSS properties are now case-insensitive
! DefinitionCacheFactory now can register new implementations
! New HTMLPurifier_Filter_ExtractStyleBlocks for extracting <style> from
documents and cleaning their contents up. Requires the CSSTidy library
<http://csstidy.sourceforge.net/>. You can access the blocks with the
'StyleBlocks' Context variable ($purifier->context->get('StyleBlocks')).
The output CSS can also be "scoped" for a specific element, use:
%Filter.ExtractStyleBlocksScope
! Experimental support for some proprietary CSS attributes allowed:
opacity (and all of the browser-specific equivalents) and scrollbar colors.
Enable by setting %CSS.Proprietary to true.
- Colors missing # but in hex form will be corrected
- CSS Number algorithm improved
- Unit testing and multi-testing now on steroids: command lines,
XML output, and other goodies now added.
. Unit tests for Injector improved
. New classes:
+ HTMLPurifier_AttrDef_CSS_AlphaValue
+ HTMLPurifier_AttrDef_CSS_Filter
. Multitest now has a file docblock
2.1.3, released 2007-11-05
! tests/multitest.php allows you to test multiple versions by running
tests/index.php through multiple interpreters using `phpv` shell
script (you must provide this script!)
- Fixed poor include ordering for Email URI AttrDefs, causes fatal errors
on some systems.
- Injector algorithm further refined: off-by-one error regarding skip
counts for dormant injectors fixed
- Corrective blockquote definition now enabled for HTML 4.01 Strict
- Fatal error when <img> tag (or any other element with required attributes)
has 'id' attribute fixed, thanks NykO18 for reporting
- Fix warning emitted when a non-supported URI scheme is passed to the
MakeAbsolute URIFilter, thanks NykO18 (again)
- Further refine AutoParagraph injector. Behavior inside of elements
allowing paragraph tags clarified: only inline content delimeted by
double newlines (not block elements) are paragraphed.
- Buggy treatment of end tags of elements that have required attributes
fixed (does not manifest on default tag-set)
- Spurious internal content reorganization error suppressed
- HTMLDefinition->addElement now returns a reference to the created
element object, as implied by the documentation
- Phorum mod's HTML Purifier help message expanded (unreleased elsewhere)
- Fix a theoretical class of infinite loops from DirectLex reported
by Nate Abele
- Work around unnecessary DOMElement type-cast in PH5P that caused errors
in PHP 5.1
- Work around PHP 4 SimpleTest lack-of-error complaining for one-time-only
HTMLDefinition errors, this may indicate problems with error-collecting
facilities in PHP 5
- Make ErrorCollectorEMock work in both PHP 4 and PHP 5
- Make PH5P work with PHP 5.0 by removing unnecessary array parameter typedef
. %Core.AcceptFullDocuments renamed to %Core.ConvertDocumentToFragment
to better communicate its purpose
. Error unit tests can now specify the expectation of no errors. Future
iterations of the harness will be extremely strict about what errors
are allowed
. Extend Injector hooks to allow for more powerful injector routines
. HTMLDefinition->addBlankElement created, as according to the HTMLModule
method
. Doxygen configuration file updated, with minor improvements
. Test runner now checks for similarly named files in conf/ directory too.
. Minor cosmetic change to flush-definition-cache.php: trailing newline is
outputted
. Maintenance script for generating PH5P patch added, original PH5P source
file also added under version control
. Full unit test runner script title made more descriptive with PHP version
. Updated INSTALL file to state that 4.3.7 is the earliest version we
are actively testing
2.1.2, released 2007-09-03
! Implemented Object module for trusted users
! Implemented experimental HTML5 parsing mode using PH5P. To use, add
this to your code:
require_once 'HTMLPurifier/Lexer/PH5P.php';
$config->set('Core', 'LexerImpl', 'PH5P');
Note that this Lexer introduces some classes not in the HTMLPurifier
namespace. Also, this is PHP5 only.
! CSS property border-spacing implemented
- Fix non-visible parsing error in DirectLex with empty tags that have
slashes inside attribute values.
- Fix typo in CSS definition: border-collapse:seperate; was incorrectly
accepted as valid CSS. Usually non-visible, because this styling is the
default for tables in most browsers. Thanks Brett Zamir for pointing
this out.
- Fix validation errors in configuration form
- Hammer out a bunch of edge-case bugs in the standalone distribution
- Inclusion reflection removed from URISchemeRegistry; you must manually
include any new schema files you wish to use
- Numerous typo fixes in documentation thanks to Brett Zamir
. Unit test refactoring for one logical test per test function
. Config and context parameters in ComplexHarness deprecated: instead, edit
the $config and $context member variables
. HTML wrapper in DOMLex now takes DTD identifiers into account; doesn't
really make a difference, but is good for completeness sake
. merge-library.php script refactored for greater code reusability and
PHP4 compatibility
2.1.1, released 2007-08-04
- Fix show-stopper bug in %URI.MakeAbsolute functionality
- Fix PHP4 syntax error in standalone version
. Add prefix directory to include path for standalone, this prevents
other installations from clobbering the standalone's URI schemes
. Single test methods can be invoked by prefixing with __only
2.1.0, released 2007-08-02
# flush-htmldefinition-cache.php superseded in favor of a generic
flush-definition-cache.php script, you can clear a specific cache
by passing its name as a parameter to the script
! Phorum mod implemented for HTML Purifier
! With %Core.AggressivelyFixLt, <3 and similar emoticons no longer
trigger HTML removal in PHP5 (DOMLex). This directive is not necessary
for PHP4 (DirectLex).
! Standalone file now available, which greatly reduces the amount of
includes (although there are still a few files that reside in the
standalone folder)
! Relative URIs can now be transformed into their absolute equivalents
using %URI.Base and %URI.MakeAbsolute
! Ruby implemented for XHTML 1.1
! You can now define custom URI filtering behavior, see enduser-uri-filter.html
for more details
! UTF-8 font names now supported in CSS
- AutoFormatters emit friendly error messages if tags or attributes they
need are not allowed
- ConfigForm's compactification of directive names is now configurable
- AutoParagraph autoformatter algorithm refined after field-testing
- XHTML 1.1 now applies XHTML 1.0 Strict cleanup routines, namely
blockquote wrapping
- Contents of <style> tags removed by default when tags are removed
. HTMLPurifier_Config->getSerial() implemented, this is extremely useful
for output cache invalidation
. ConfigForm printer now can retrieve CSS and JS files as strings, in
case HTML Purifier's directory is not publically accessible
. Introduce new text/itext configuration directive values: these represent
longer strings that would be more appropriately edited with a textarea
. Allow newlines to act as separators for lists, hashes, lookups and
%HTML.Allowed
. ConfigForm generates textareas instead of text inputs for lists, hashes,
lookups, text and itext fields
. Hidden element content removal genericized: %Core.HiddenElements can
be used to customize this behavior, by default <script> and <style> are
hidden
. Added HTMLPURIFIER_PREFIX constant, should be used instead of dirname(__FILE__)
. Custom ChildDef added to default include list
. URIScheme reflection improved: will not attempt to include file if class
already exists. May clobber autoload, so I need to keep an eye on it
. ConfigSchema heavily optimized, will only collect information and validate
definitions when HTMLPURIFIER_SCHEMA_STRICT is true.
. AttrDef_URI unit tests and implementation refactored
. benchmarks/ directory now protected from public view with .htaccess file;
run the tests via command line
. URI scheme is munged off if there is no authority and the scheme is the
default one
. All unit tests inherit from HTMLPurifier_Harness, not UnitTestCase
. Interface for URIScheme changed
. Generic URI object to hold components of URI added, most systems involved
in URI validation have been migrated to use it
. Custom filtering for URIs factored out to URIDefinition interface for
maximum extensibility
2.0.1, released 2007-06-27
! Tag auto-closing now based on a ChildDef heuristic rather than a
manually set auto_close array; some behavior may change
! Experimental AutoFormat functionality added: auto-paragraph and
linkify your HTML input by setting %AutoFormat.AutoParagraph and
%AutoFormat.Linkify to true
! Newlines normalized internally, and then converted back to the
value of PHP_EOL. If this is not desired, set your newline format
using %Output.Newline.
! Beta error collection, messages are implemented for the most generic
cases involving Lexing or Strategies
- Clean up special case code for <script> tags
- Reorder includes for DefinitionCache decorators, fixes a possible
missing class error
- Fixed bug where manually modified definitions were not saved via cache
(mostly harmless, except for the fact that it would be a little slower)
- Configuration objects with different serials do not clobber each
others when revision numbers are unequal
- Improve Serializer DefinitionCache directory permissions checks
- DefinitionCache no longer throws errors when it encounters old
serial files that do not conform to the current style
- Stray xmlns attributes removed from configuration documentation
- configForm.php smoketest no longer has XSS vulnerability due to
unescaped print_r output
- Printer adheres to configuration's directives on output format
- Fix improperly named form field in ConfigForm printer
. Rewire some test-cases to swallow errors rather than expect them
. HTMLDefinition printer updated with some of the new attributes
. DefinitionCache keys reordered to reflect precedence: version number,
hash, then revision number
. %Core.DefinitionCache renamed to %Cache.DefinitionImpl
. Interlinking in configuration documentation added using
Injector_PurifierLinkify
. Directives now keep track of aliases to themselves
. Error collector now requires a severity to be passed, use PHP's internal
error constants for this
. HTMLPurifier_Config::getAllowedDirectivesForForm implemented, allows
much easier selective embedding of configuration values
. Doctype objects now accept public and system DTD identifiers
. %HTML.Doctype is now constrained by specific values, to specify a custom
doctype use new %HTML.CustomDoctype
. ConfigForm truncates long directives to keep the form small, and does
not re-output namespaces
2.0.0, released 2007-06-20
# Completely refactored HTMLModuleManager, decentralizing safety
information
# Transform modules changed to Tidy modules, which offer more flexibility
and better modularization
# Configuration object now finalizes itself when a read operation is
performed on it, ensuring that its internal state stays consistent.
To revert this behavior, you can set the $autoFinalize member variable
off, but it's not recommended.
# New compact syntax for AttrDef objects that can be used to instantiate
new objects via make()
# Definitions (esp. HTMLDefinition) are now cached for a significant
performance boost. You can disable caching by setting %Core.DefinitionCache
to null. You CANNOT edit raw definitions without setting the corresponding
DefinitionID directive (%HTML.DefinitionID for HTMLDefinition).
# Contents between <script> tags are now completely removed if <script>
is not allowed
# Prototype-declarations for Lexer removed in favor of configuration
determination of Lexer implementations.
! HTML Purifier now works in PHP 4.3.2.
! Configuration form-editing API makes tweaking HTMLPurifier_Config a
breeze!
! Configuration directives that accept hashes now allow new string
format: key1:value1,key2:value2
! ConfigDoc now factored into OOP design
! All deprecated elements now natively supported
! Implement TinyMCE styled whitelist specification format in
%HTML.Allowed
! Config object gives more friendly error messages when things go wrong
! Advanced API implemented: easy functions for creating elements (addElement)
and attributes (addAttribute) on HTMLDefinition
! Add native support for required attributes
- Deprecated and removed EnableRedundantUTF8Cleaning. It didn't even work!
- DOMLex will not emit errors when a custom error handler that does not
honor error_reporting is used
- StrictBlockquote child definition refrains from wrapping whitespace
in tags now.
- Bug resulting from tag transforms to non-allowed elements fixed
- ChildDef_Custom's regex generation has been improved, removing several
false positives
. Unit test for ElementDef created, ElementDef behavior modified to
be more flexible
. Added convenience functions for HTMLModule constructors
. AttrTypes now has accessor functions that should be used instead
of directly manipulating info
. TagTransform_Center deprecated in favor of generic TagTransform_Simple
. Add extra protection in AttrDef_URI against phantom Schemes
. Doctype object added to HTMLDefinition which describes certain aspects
of the operational document type
. Lexer is now pre-emptively included, with a conditional include for the
PHP5 only version.
. HTMLDefinition and CSSDefinition have a common parent class: Definition.
. DirectLex can now track line-numbers
. Preliminary error collector is in place, although no code actually reports
errors yet
. Factor out most of ValidateAttributes to new AttrValidator class
1.6.1, released 2007-05-05
! Support for more deprecated attributes via transformations:
+ hspace and vspace in img
+ size and noshade in hr
+ nowrap in td
+ clear in br
+ align in caption, table, img and hr
+ type in ul, ol and li
! DirectLex now preserves text in which a < bracket is followed by
a non-alphanumeric character. This means that certain emoticons
are now preserved.
! %Core.RemoveInvalidImg is now operational, when set to false invalid
images will hang around with an empty src
! target attribute in a tag supported, use %Attr.AllowedFrameTargets
to enable
! CSS property white-space now allows nowrap (supported in all modern
browsers) but not others (which have spotty browser implementations)
! XHTML 1.1 mode now sort-of works without any fatal errors, and
lang is now moved over to xml:lang.
! Attribute transformation smoketest available at smoketests/attrTransform.php
! Transformation of font's size attribute now handles super-large numbers
- Possibly fatal bug with __autoload() fixed in module manager
- Invert HTMLModuleManager->addModule() processing order to check
prefixes first and then the literal module
- Empty strings get converted to empty arrays instead of arrays with
an empty string in them.
- Merging in attribute lists now works.
. Demo script removed: it has been added to the website's repository
. Basic.php script modified to work out of the box
. Refactor AttrTransform classes to reduce duplication
. AttrTransform_TextAlign axed in favor of a more general
AttrTransform_EnumToCSS, refer to HTMLModule/TransformToStrict.php to
see how the new equivalent is implemented
. Unit tests now use exclusively assertIdentical
1.6.0, released 2007-04-01
! Support for most common deprecated attributes via transformations:
+ bgcolor in td, th, tr and table
+ border in img
+ name in a and img
+ width in td, th and hr
+ height in td, th
! Support for CSS attribute 'height' added
! Support for rel and rev attributes in a tags added, use %Attr.AllowedRel
and %Attr.AllowedRev to activate
- You can define ID blacklists using regular expressions via
%Attr.IDBlacklistRegexp
- Error messages are emitted when you attempt to "allow" elements or
attributes that HTML Purifier does not support
- Fix segfault in unit test. The problem is not very reproduceable and
I don't know what causes it, but a six line patch fixed it.
1.5.0, released 2007-03-23
! Added a rudimentary I18N and L10N system modeled off MediaWiki. It
doesn't actually do anything yet, but keep your eyes peeled.
! docs/enduser-utf8.html explains how to use UTF-8 and HTML Purifier
! Newly structured HTMLDefinition modeled off of XHTML 1.1 modules.
I am loathe to release beta quality APIs, but this is exactly that;
don't use the internal interfaces if you're not willing to do migration
later on.
- Allow 'x' subtag in language codes
- Fixed buggy chameleon-support for ins and del
. Added support for IDREF attributes (i.e. for)
. Renamed HTMLPurifier_AttrDef_Class to HTMLPurifier_AttrDef_Nmtokens
. Removed context variable ParentType, replaced with IsInline, which
is false when you're not inline and an integer of the parent that
caused you to become inline when you are (so possibly zero)
. Removed ElementDef->type in favor of ElementDef->descendants_are_inline
and HTMLDefinition->content_sets
. StrictBlockquote now reports what elements its supposed to allow,
rather than what it does allow
. Removed HTMLDefinition->info_flow_elements in favor of
HTMLDefinition->content_sets['Flow']
. Removed redundant "exclusionary" definitions from DTD roster
. StrictBlockquote now requires a construction parameter as if it
were an Required ChildDef, this is the "real" set of allowed elements
. AttrDef partitioned into HTML, CSS and URI segments
. Modify Youtube filter regexp to be multiline
. Require both PHP5 and DOM extension in order to use DOMLex, fixes
some edge cases where a DOMDocument class exists in a PHP4 environment
due to DOM XML extension.
1.4.1, released 2007-01-21
! docs/enduser-youtube.html updated according to new functionality
- YouTube IDs can have underscores and dashes
1.4.0, released 2007-01-21
! Implemented list-style-image, URIs now allowed in list-style
! Implemented background-image, background-repeat, background-attachment
and background-position CSS properties. Shorthand property background
supports all of these properties.
! Configuration documentation looks nicer
! Added %Core.EscapeNonASCIICharacters to workaround loss of Unicode
characters while %Core.Encoding is set to a non-UTF-8 encoding.
! Support for configuration directive aliases added
! Config object can now be instantiated from ini files
! YouTube preservation code added to the core, with two lines of code
you can add it as a filter to your code. See smoketests/preserveYouTube.php
for sample code.
! Moved SLOW to docs/enduser-slow.html and added code examples
- Replaced version check with functionality check for DOM (thanks Stephen
Khoo)
. Added smoketest 'all.php', which loads all other smoketests via frames
. Implemented AttrDef_CSSURI for url(http://google.com) style declarations
. Added convenient single test selector form on test runner
1.3.2, released 2006-12-25
! HTMLPurifier object now accepts configuration arrays, no need to manually
instantiate a configuration object
! Context object now accessible to outside
! Added enduser-youtube.html, explains how to embed YouTube videos. See
also corresponding smoketest preserveYouTube.php.
! Added purifyArray(), which takes a list of HTML and purifies it all
! Added static member variable $version to HTML Purifier with PHP-compatible
version number string.
- Fixed fatal error thrown by upper-cased language attributes
- printDefinition.php: added labels, added better clarification
. HTMLPurifier_Config::create() added, takes mixed variable and converts into
a HTMLPurifier_Config object.
1.3.1, released 2006-12-06
! Added HTMLPurifier.func.php stub for a convenient function to call the library
- Fixed bug in RemoveInvalidImg code that caused all images to be dropped
(thanks to .mario for reporting this)
. Standardized all attribute handling variables to attr, made it plural
1.3.0, released 2006-11-26
# Invalid images are now removed, rather than replaced with a dud
<img src="" alt="Invalid image" />. Previous behavior can be restored
with new directive %Core.RemoveInvalidImg set to false.
! (X)HTML Strict now supported
+ Transparently handles inline elements in block context (blockquote)
! Added GET method to demo for easier validation, added 50kb max input size
! New directive %HTML.BlockWrapper, for block-ifying inline elements
! New directive %HTML.Parent, allows you to only allow inline content
! New directives %HTML.AllowedElements and %HTML.AllowedAttributes to let
users narrow the set of allowed tags
! <li value="4"> and <ul start="2"> now allowed in loose mode
! New directives %URI.DisableExternalResources and %URI.DisableResources
! New directive %Attr.DisableURI, which eliminates all hyperlinking
! New directive %URI.Munge, munges URI so you can use some sort of redirector
service to avoid PageRank leaks or warn users that they are exiting your site.
! Added spiffy new smoketest printDefinition.php, which lets you twiddle with
the configuration settings and see how the internal rules are affected.
! New directive %URI.HostBlacklist for blocking links to bad hosts.
xssAttacks.php smoketest updated accordingly.
- Added missing type to ChildDef_Chameleon
- Remove Tidy option from demo if there is not Tidy available
. ChildDef_Required guards against empty tags
. Lookup table HTMLDefinition->info_flow_elements added
. Added peace-of-mind variable initialization to Strategy_FixNesting
. Added HTMLPurifier->info_parent_def, parent child processing made special
. Added internal documents briefly summarizing future progression of HTML
. HTMLPurifier_Config->getBatch($namespace) added
. More lenient casting to bool from string in HTMLPurifier_ConfigSchema
. Refactored ChildDef classes into their own files
1.2.0, released 2006-11-19
# ID attributes now disabled by default. New directives:
+ %HTML.EnableAttrID - restores old behavior by allowing IDs
+ %Attr.IDPrefix - %Attr.IDBlacklist alternative that munges all user IDs
so that they don't collide with your IDs
+ %Attr.IDPrefixLocal - Same as above, but for when there are multiple
instances of user content on the page
+ Profuse documentation on how to use these available in docs/enduser-id.txt
! Added MODx plugin <http://modxcms.com/forums/index.php/topic,6604.0.html>
! Added percent encoding normalization
! XSS attacks smoketest given facelift
! Configuration documentation now has table of contents
! Added %URI.DisableExternal, which prevents links to external websites. You
can also use %URI.Host to permit absolute linking to subdomains
! Non-accessible resources (ex. mailto) blocked from embedded URIs (img src)
- Type variable in HTMLDefinition was not being set properly, fixed
- Documentation updated
+ TODO added request Phalanger
+ TODO added request Native compression
+ TODO added request Remove redundant tags
+ TODO added possible plaintext formatter for HTML Purifier documentation
+ Updated ConfigDoc TODO
+ Improved inline comments in AttrDef/Class.php, AttrDef/CSS.php
and AttrDef/Host.php
+ Revamped documentation into HTML, along with misc updates
- HTMLPurifier_Context doesn't throw a variable reference error if you attempt
to retrieve a non-existent variable
. Switched to purify()-wide Context object registry
. Refactored unit tests to minimize duplication
. XSS attack sheet updated
. configdoc.xml now has xml:space attached to default value nodes
. Allow configuration directives to permit null values
. Cleaned up test-cases to remove unnecessary swallowErrors()
1.1.2, released 2006-09-30
! Add HTMLPurifier.auto.php stub file that configures include_path
- Documentation updated
+ INSTALL document rewritten
+ TODO added semi-lossy conversion
+ API Doxygen docs' file exclusions updated
+ Added notes on HTML versus XML attribute whitespace handling
+ Noted that HTMLPurifier_ChildDef_Custom isn't being used
+ Noted that config object's definitions are cached versions
- Fixed lack of attribute parsing in HTMLPurifier_Lexer_PEARSax3
- ftp:// URIs now have their typecodes checked
- Hooked up HTMLPurifier_ChildDef_Custom's unit tests (they weren't being run)
. Line endings standardized throughout project (svn:eol-style standardized)
. Refactored parseData() to general Lexer class
. Tester named "HTML Purifier" not "HTMLPurifier"
1.1.1, released 2006-09-24
! Configuration option to optionally Tidy up output for indentation to make up
for dropped whitespace by DOMLex (pretty-printing for the entire application
should be done by a page-wide Tidy)
- Various documentation updates
- Fixed parse error in configuration documentation script
- Fixed fatal error in benchmark scripts, slightly augmented
- As far as possible, whitespace is preserved in-between table children
- Sample test-settings.php file included
1.1.0, released 2006-09-16
! Directive documentation generation using XSLT
! XHTML can now be turned off, output becomes <br>
- Made URI validator more forgiving: will ignore leading and trailing
quotes, apostrophes and less than or greater than signs.
- Enforce alphanumeric namespace and directive names for configuration.
- Table child definition made more flexible, will fix up poorly ordered elements
. Renamed ConfigDef to ConfigSchema
1.0.1, released 2006-09-04
- Fixed slight bug in DOMLex attribute parsing
- Fixed rejection of case-insensitive configuration values when there is a
set of allowed values. This manifested in %Core.Encoding.
- Fixed rejection of inline style declarations that had lots of extra
space in them. This manifested in TinyMCE.
1.0.0, released 2006-09-01
! Shorthand CSS properties implemented: font, border, background, list-style
! Basic color keywords translated into hexadecimal values
! Table CSS properties implemented
! Support for charsets other than UTF-8 (defined by iconv)
! Malformed UTF-8 and non-SGML character detection and cleaning implemented
- Fixed broken numeric entity conversion
- API documentation completed
. (HTML|CSS)Definition de-singleton-ized
1.0.0beta, released 2006-08-16
! First public release, most functionality implemented. Notable omissions are:
+ Shorthand CSS properties
+ Table CSS properties
+ Deprecated attribute transformations
vim: et sw=4 sts=4

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4.3.0

26
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<?php
/**
* @file
* Convenience file that registers autoload handler for HTML Purifier.
* It also does some sanity checks.
*/
if (function_exists('spl_autoload_register') && function_exists('spl_autoload_unregister')) {
// We need unregister for our pre-registering functionality
HTMLPurifier_Bootstrap::registerAutoload();
if (function_exists('__autoload')) {
// Be polite and ensure that userland autoload gets retained
spl_autoload_register('__autoload');
}
} elseif (!function_exists('__autoload')) {
function __autoload($class) {
return HTMLPurifier_Bootstrap::autoload($class);
}
}
if (ini_get('zend.ze1_compatibility_mode')) {
trigger_error("HTML Purifier is not compatible with zend.ze1_compatibility_mode; please turn it off", E_USER_ERROR);
}
// vim: et sw=4 sts=4

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<?php
/**
* @file
* This file was auto-generated by generate-includes.php and includes all of
* the core files required by HTML Purifier. Use this if performance is a
* primary concern and you are using an opcode cache. PLEASE DO NOT EDIT THIS
* FILE, changes will be overwritten the next time the script is run.
*
* @version 4.3.0
*
* @warning
* You must *not* include any other HTML Purifier files before this file,
* because 'require' not 'require_once' is used.
*
* @warning
* This file requires that the include path contains the HTML Purifier
* library directory; this is not auto-set.
*/
require 'HTMLPurifier.php';
require 'HTMLPurifier/AttrCollections.php';
require 'HTMLPurifier/AttrDef.php';
require 'HTMLPurifier/AttrTransform.php';
require 'HTMLPurifier/AttrTypes.php';
require 'HTMLPurifier/AttrValidator.php';
require 'HTMLPurifier/Bootstrap.php';
require 'HTMLPurifier/Definition.php';
require 'HTMLPurifier/CSSDefinition.php';
require 'HTMLPurifier/ChildDef.php';
require 'HTMLPurifier/Config.php';
require 'HTMLPurifier/ConfigSchema.php';
require 'HTMLPurifier/ContentSets.php';
require 'HTMLPurifier/Context.php';
require 'HTMLPurifier/DefinitionCache.php';
require 'HTMLPurifier/DefinitionCacheFactory.php';
require 'HTMLPurifier/Doctype.php';
require 'HTMLPurifier/DoctypeRegistry.php';
require 'HTMLPurifier/ElementDef.php';
require 'HTMLPurifier/Encoder.php';
require 'HTMLPurifier/EntityLookup.php';
require 'HTMLPurifier/EntityParser.php';
require 'HTMLPurifier/ErrorCollector.php';
require 'HTMLPurifier/ErrorStruct.php';
require 'HTMLPurifier/Exception.php';
require 'HTMLPurifier/Filter.php';
require 'HTMLPurifier/Generator.php';
require 'HTMLPurifier/HTMLDefinition.php';
require 'HTMLPurifier/HTMLModule.php';
require 'HTMLPurifier/HTMLModuleManager.php';
require 'HTMLPurifier/IDAccumulator.php';
require 'HTMLPurifier/Injector.php';
require 'HTMLPurifier/Language.php';
require 'HTMLPurifier/LanguageFactory.php';
require 'HTMLPurifier/Length.php';
require 'HTMLPurifier/Lexer.php';
require 'HTMLPurifier/PercentEncoder.php';
require 'HTMLPurifier/PropertyList.php';
require 'HTMLPurifier/PropertyListIterator.php';
require 'HTMLPurifier/Strategy.php';
require 'HTMLPurifier/StringHash.php';
require 'HTMLPurifier/StringHashParser.php';
require 'HTMLPurifier/TagTransform.php';
require 'HTMLPurifier/Token.php';
require 'HTMLPurifier/TokenFactory.php';
require 'HTMLPurifier/URI.php';
require 'HTMLPurifier/URIDefinition.php';
require 'HTMLPurifier/URIFilter.php';
require 'HTMLPurifier/URIParser.php';
require 'HTMLPurifier/URIScheme.php';
require 'HTMLPurifier/URISchemeRegistry.php';
require 'HTMLPurifier/UnitConverter.php';
require 'HTMLPurifier/VarParser.php';
require 'HTMLPurifier/VarParserException.php';
require 'HTMLPurifier/AttrDef/CSS.php';
require 'HTMLPurifier/AttrDef/Enum.php';
require 'HTMLPurifier/AttrDef/Integer.php';
require 'HTMLPurifier/AttrDef/Lang.php';
require 'HTMLPurifier/AttrDef/Switch.php';
require 'HTMLPurifier/AttrDef/Text.php';
require 'HTMLPurifier/AttrDef/URI.php';
require 'HTMLPurifier/AttrDef/CSS/Number.php';
require 'HTMLPurifier/AttrDef/CSS/AlphaValue.php';
require 'HTMLPurifier/AttrDef/CSS/Background.php';
require 'HTMLPurifier/AttrDef/CSS/BackgroundPosition.php';
require 'HTMLPurifier/AttrDef/CSS/Border.php';
require 'HTMLPurifier/AttrDef/CSS/Color.php';
require 'HTMLPurifier/AttrDef/CSS/Composite.php';
require 'HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
require 'HTMLPurifier/AttrDef/CSS/Filter.php';
require 'HTMLPurifier/AttrDef/CSS/Font.php';
require 'HTMLPurifier/AttrDef/CSS/FontFamily.php';
require 'HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
require 'HTMLPurifier/AttrDef/CSS/Length.php';
require 'HTMLPurifier/AttrDef/CSS/ListStyle.php';
require 'HTMLPurifier/AttrDef/CSS/Multiple.php';
require 'HTMLPurifier/AttrDef/CSS/Percentage.php';
require 'HTMLPurifier/AttrDef/CSS/TextDecoration.php';
require 'HTMLPurifier/AttrDef/CSS/URI.php';
require 'HTMLPurifier/AttrDef/HTML/Bool.php';
require 'HTMLPurifier/AttrDef/HTML/Nmtokens.php';
require 'HTMLPurifier/AttrDef/HTML/Class.php';
require 'HTMLPurifier/AttrDef/HTML/Color.php';
require 'HTMLPurifier/AttrDef/HTML/FrameTarget.php';
require 'HTMLPurifier/AttrDef/HTML/ID.php';
require 'HTMLPurifier/AttrDef/HTML/Pixels.php';
require 'HTMLPurifier/AttrDef/HTML/Length.php';
require 'HTMLPurifier/AttrDef/HTML/LinkTypes.php';
require 'HTMLPurifier/AttrDef/HTML/MultiLength.php';
require 'HTMLPurifier/AttrDef/URI/Email.php';
require 'HTMLPurifier/AttrDef/URI/Host.php';
require 'HTMLPurifier/AttrDef/URI/IPv4.php';
require 'HTMLPurifier/AttrDef/URI/IPv6.php';
require 'HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php';
require 'HTMLPurifier/AttrTransform/Background.php';
require 'HTMLPurifier/AttrTransform/BdoDir.php';
require 'HTMLPurifier/AttrTransform/BgColor.php';
require 'HTMLPurifier/AttrTransform/BoolToCSS.php';
require 'HTMLPurifier/AttrTransform/Border.php';
require 'HTMLPurifier/AttrTransform/EnumToCSS.php';
require 'HTMLPurifier/AttrTransform/ImgRequired.php';
require 'HTMLPurifier/AttrTransform/ImgSpace.php';
require 'HTMLPurifier/AttrTransform/Input.php';
require 'HTMLPurifier/AttrTransform/Lang.php';
require 'HTMLPurifier/AttrTransform/Length.php';
require 'HTMLPurifier/AttrTransform/Name.php';
require 'HTMLPurifier/AttrTransform/NameSync.php';
require 'HTMLPurifier/AttrTransform/Nofollow.php';
require 'HTMLPurifier/AttrTransform/SafeEmbed.php';
require 'HTMLPurifier/AttrTransform/SafeObject.php';
require 'HTMLPurifier/AttrTransform/SafeParam.php';
require 'HTMLPurifier/AttrTransform/ScriptRequired.php';
require 'HTMLPurifier/AttrTransform/Textarea.php';
require 'HTMLPurifier/ChildDef/Chameleon.php';
require 'HTMLPurifier/ChildDef/Custom.php';
require 'HTMLPurifier/ChildDef/Empty.php';
require 'HTMLPurifier/ChildDef/Required.php';
require 'HTMLPurifier/ChildDef/Optional.php';
require 'HTMLPurifier/ChildDef/StrictBlockquote.php';
require 'HTMLPurifier/ChildDef/Table.php';
require 'HTMLPurifier/DefinitionCache/Decorator.php';
require 'HTMLPurifier/DefinitionCache/Null.php';
require 'HTMLPurifier/DefinitionCache/Serializer.php';
require 'HTMLPurifier/DefinitionCache/Decorator/Cleanup.php';
require 'HTMLPurifier/DefinitionCache/Decorator/Memory.php';
require 'HTMLPurifier/HTMLModule/Bdo.php';
require 'HTMLPurifier/HTMLModule/CommonAttributes.php';
require 'HTMLPurifier/HTMLModule/Edit.php';
require 'HTMLPurifier/HTMLModule/Forms.php';
require 'HTMLPurifier/HTMLModule/Hypertext.php';
require 'HTMLPurifier/HTMLModule/Image.php';
require 'HTMLPurifier/HTMLModule/Legacy.php';
require 'HTMLPurifier/HTMLModule/List.php';
require 'HTMLPurifier/HTMLModule/Name.php';
require 'HTMLPurifier/HTMLModule/Nofollow.php';
require 'HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
require 'HTMLPurifier/HTMLModule/Object.php';
require 'HTMLPurifier/HTMLModule/Presentation.php';
require 'HTMLPurifier/HTMLModule/Proprietary.php';
require 'HTMLPurifier/HTMLModule/Ruby.php';
require 'HTMLPurifier/HTMLModule/SafeEmbed.php';
require 'HTMLPurifier/HTMLModule/SafeObject.php';
require 'HTMLPurifier/HTMLModule/Scripting.php';
require 'HTMLPurifier/HTMLModule/StyleAttribute.php';
require 'HTMLPurifier/HTMLModule/Tables.php';
require 'HTMLPurifier/HTMLModule/Target.php';
require 'HTMLPurifier/HTMLModule/Text.php';
require 'HTMLPurifier/HTMLModule/Tidy.php';
require 'HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
require 'HTMLPurifier/HTMLModule/Tidy/Name.php';
require 'HTMLPurifier/HTMLModule/Tidy/Proprietary.php';
require 'HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php';
require 'HTMLPurifier/HTMLModule/Tidy/Strict.php';
require 'HTMLPurifier/HTMLModule/Tidy/Transitional.php';
require 'HTMLPurifier/HTMLModule/Tidy/XHTML.php';
require 'HTMLPurifier/Injector/AutoParagraph.php';
require 'HTMLPurifier/Injector/DisplayLinkURI.php';
require 'HTMLPurifier/Injector/Linkify.php';
require 'HTMLPurifier/Injector/PurifierLinkify.php';
require 'HTMLPurifier/Injector/RemoveEmpty.php';
require 'HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php';
require 'HTMLPurifier/Injector/SafeObject.php';
require 'HTMLPurifier/Lexer/DOMLex.php';
require 'HTMLPurifier/Lexer/DirectLex.php';
require 'HTMLPurifier/Strategy/Composite.php';
require 'HTMLPurifier/Strategy/Core.php';
require 'HTMLPurifier/Strategy/FixNesting.php';
require 'HTMLPurifier/Strategy/MakeWellFormed.php';
require 'HTMLPurifier/Strategy/RemoveForeignElements.php';
require 'HTMLPurifier/Strategy/ValidateAttributes.php';
require 'HTMLPurifier/TagTransform/Font.php';
require 'HTMLPurifier/TagTransform/Simple.php';
require 'HTMLPurifier/Token/Comment.php';
require 'HTMLPurifier/Token/Tag.php';
require 'HTMLPurifier/Token/Empty.php';
require 'HTMLPurifier/Token/End.php';
require 'HTMLPurifier/Token/Start.php';
require 'HTMLPurifier/Token/Text.php';
require 'HTMLPurifier/URIFilter/DisableExternal.php';
require 'HTMLPurifier/URIFilter/DisableExternalResources.php';
require 'HTMLPurifier/URIFilter/DisableResources.php';
require 'HTMLPurifier/URIFilter/HostBlacklist.php';
require 'HTMLPurifier/URIFilter/MakeAbsolute.php';
require 'HTMLPurifier/URIFilter/Munge.php';
require 'HTMLPurifier/URIScheme/data.php';
require 'HTMLPurifier/URIScheme/file.php';
require 'HTMLPurifier/URIScheme/ftp.php';
require 'HTMLPurifier/URIScheme/http.php';
require 'HTMLPurifier/URIScheme/https.php';
require 'HTMLPurifier/URIScheme/mailto.php';
require 'HTMLPurifier/URIScheme/news.php';
require 'HTMLPurifier/URIScheme/nntp.php';
require 'HTMLPurifier/VarParser/Flexible.php';
require 'HTMLPurifier/VarParser/Native.php';

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<?php
/*! @mainpage
*
* HTML Purifier is an HTML filter that will take an arbitrary snippet of
* HTML and rigorously test, validate and filter it into a version that
* is safe for output onto webpages. It achieves this by:
*
* -# Lexing (parsing into tokens) the document,
* -# Executing various strategies on the tokens:
* -# Removing all elements not in the whitelist,
* -# Making the tokens well-formed,
* -# Fixing the nesting of the nodes, and
* -# Validating attributes of the nodes; and
* -# Generating HTML from the purified tokens.
*
* However, most users will only need to interface with the HTMLPurifier
* and HTMLPurifier_Config.
*/
/*
HTML Purifier 4.3.0 - Standards Compliant HTML Filtering
Copyright (C) 2006-2008 Edward Z. Yang
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* Facade that coordinates HTML Purifier's subsystems in order to purify HTML.
*
* @note There are several points in which configuration can be specified
* for HTML Purifier. The precedence of these (from lowest to
* highest) is as follows:
* -# Instance: new HTMLPurifier($config)
* -# Invocation: purify($html, $config)
* These configurations are entirely independent of each other and
* are *not* merged (this behavior may change in the future).
*
* @todo We need an easier way to inject strategies using the configuration
* object.
*/
class HTMLPurifier
{
/** Version of HTML Purifier */
public $version = '4.3.0';
/** Constant with version of HTML Purifier */
const VERSION = '4.3.0';
/** Global configuration object */
public $config;
/** Array of extra HTMLPurifier_Filter objects to run on HTML, for backwards compatibility */
private $filters = array();
/** Single instance of HTML Purifier */
private static $instance;
protected $strategy, $generator;
/**
* Resultant HTMLPurifier_Context of last run purification. Is an array
* of contexts if the last called method was purifyArray().
*/
public $context;
/**
* Initializes the purifier.
* @param $config Optional HTMLPurifier_Config object for all instances of
* the purifier, if omitted, a default configuration is
* supplied (which can be overridden on a per-use basis).
* The parameter can also be any type that
* HTMLPurifier_Config::create() supports.
*/
public function __construct($config = null) {
$this->config = HTMLPurifier_Config::create($config);
$this->strategy = new HTMLPurifier_Strategy_Core();
}
/**
* Adds a filter to process the output. First come first serve
* @param $filter HTMLPurifier_Filter object
*/
public function addFilter($filter) {
trigger_error('HTMLPurifier->addFilter() is deprecated, use configuration directives in the Filter namespace or Filter.Custom', E_USER_WARNING);
$this->filters[] = $filter;
}
/**
* Filters an HTML snippet/document to be XSS-free and standards-compliant.
*
* @param $html String of HTML to purify
* @param $config HTMLPurifier_Config object for this operation, if omitted,
* defaults to the config object specified during this
* object's construction. The parameter can also be any type
* that HTMLPurifier_Config::create() supports.
* @return Purified HTML
*/
public function purify($html, $config = null) {
// :TODO: make the config merge in, instead of replace
$config = $config ? HTMLPurifier_Config::create($config) : $this->config;
// implementation is partially environment dependant, partially
// configuration dependant
$lexer = HTMLPurifier_Lexer::create($config);
$context = new HTMLPurifier_Context();
// setup HTML generator
$this->generator = new HTMLPurifier_Generator($config, $context);
$context->register('Generator', $this->generator);
// set up global context variables
if ($config->get('Core.CollectErrors')) {
// may get moved out if other facilities use it
$language_factory = HTMLPurifier_LanguageFactory::instance();
$language = $language_factory->create($config, $context);
$context->register('Locale', $language);
$error_collector = new HTMLPurifier_ErrorCollector($context);
$context->register('ErrorCollector', $error_collector);
}
// setup id_accumulator context, necessary due to the fact that
// AttrValidator can be called from many places
$id_accumulator = HTMLPurifier_IDAccumulator::build($config, $context);
$context->register('IDAccumulator', $id_accumulator);
$html = HTMLPurifier_Encoder::convertToUTF8($html, $config, $context);
// setup filters
$filter_flags = $config->getBatch('Filter');
$custom_filters = $filter_flags['Custom'];
unset($filter_flags['Custom']);
$filters = array();
foreach ($filter_flags as $filter => $flag) {
if (!$flag) continue;
if (strpos($filter, '.') !== false) continue;
$class = "HTMLPurifier_Filter_$filter";
$filters[] = new $class;
}
foreach ($custom_filters as $filter) {
// maybe "HTMLPurifier_Filter_$filter", but be consistent with AutoFormat
$filters[] = $filter;
}
$filters = array_merge($filters, $this->filters);
// maybe prepare(), but later
for ($i = 0, $filter_size = count($filters); $i < $filter_size; $i++) {
$html = $filters[$i]->preFilter($html, $config, $context);
}
// purified HTML
$html =
$this->generator->generateFromTokens(
// list of tokens
$this->strategy->execute(
// list of un-purified tokens
$lexer->tokenizeHTML(
// un-purified HTML
$html, $config, $context
),
$config, $context
)
);
for ($i = $filter_size - 1; $i >= 0; $i--) {
$html = $filters[$i]->postFilter($html, $config, $context);
}
$html = HTMLPurifier_Encoder::convertFromUTF8($html, $config, $context);
$this->context =& $context;
return $html;
}
/**
* Filters an array of HTML snippets
* @param $config Optional HTMLPurifier_Config object for this operation.
* See HTMLPurifier::purify() for more details.
* @return Array of purified HTML
*/
public function purifyArray($array_of_html, $config = null) {
$context_array = array();
foreach ($array_of_html as $key => $html) {
$array_of_html[$key] = $this->purify($html, $config);
$context_array[$key] = $this->context;
}
$this->context = $context_array;
return $array_of_html;
}
/**
* Singleton for enforcing just one HTML Purifier in your system
* @param $prototype Optional prototype HTMLPurifier instance to
* overload singleton with, or HTMLPurifier_Config
* instance to configure the generated version with.
*/
public static function instance($prototype = null) {
if (!self::$instance || $prototype) {
if ($prototype instanceof HTMLPurifier) {
self::$instance = $prototype;
} elseif ($prototype) {
self::$instance = new HTMLPurifier($prototype);
} else {
self::$instance = new HTMLPurifier();
}
}
return self::$instance;
}
/**
* @note Backwards compatibility, see instance()
*/
public static function getInstance($prototype = null) {
return HTMLPurifier::instance($prototype);
}
}
// vim: et sw=4 sts=4

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<?php
/**
* @file
* This file was auto-generated by generate-includes.php and includes all of
* the core files required by HTML Purifier. This is a convenience stub that
* includes all files using dirname(__FILE__) and require_once. PLEASE DO NOT
* EDIT THIS FILE, changes will be overwritten the next time the script is run.
*
* Changes to include_path are not necessary.
*/
$__dir = dirname(__FILE__);
require_once $__dir . '/HTMLPurifier.php';
require_once $__dir . '/HTMLPurifier/AttrCollections.php';
require_once $__dir . '/HTMLPurifier/AttrDef.php';
require_once $__dir . '/HTMLPurifier/AttrTransform.php';
require_once $__dir . '/HTMLPurifier/AttrTypes.php';
require_once $__dir . '/HTMLPurifier/AttrValidator.php';
require_once $__dir . '/HTMLPurifier/Bootstrap.php';
require_once $__dir . '/HTMLPurifier/Definition.php';
require_once $__dir . '/HTMLPurifier/CSSDefinition.php';
require_once $__dir . '/HTMLPurifier/ChildDef.php';
require_once $__dir . '/HTMLPurifier/Config.php';
require_once $__dir . '/HTMLPurifier/ConfigSchema.php';
require_once $__dir . '/HTMLPurifier/ContentSets.php';
require_once $__dir . '/HTMLPurifier/Context.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache.php';
require_once $__dir . '/HTMLPurifier/DefinitionCacheFactory.php';
require_once $__dir . '/HTMLPurifier/Doctype.php';
require_once $__dir . '/HTMLPurifier/DoctypeRegistry.php';
require_once $__dir . '/HTMLPurifier/ElementDef.php';
require_once $__dir . '/HTMLPurifier/Encoder.php';
require_once $__dir . '/HTMLPurifier/EntityLookup.php';
require_once $__dir . '/HTMLPurifier/EntityParser.php';
require_once $__dir . '/HTMLPurifier/ErrorCollector.php';
require_once $__dir . '/HTMLPurifier/ErrorStruct.php';
require_once $__dir . '/HTMLPurifier/Exception.php';
require_once $__dir . '/HTMLPurifier/Filter.php';
require_once $__dir . '/HTMLPurifier/Generator.php';
require_once $__dir . '/HTMLPurifier/HTMLDefinition.php';
require_once $__dir . '/HTMLPurifier/HTMLModule.php';
require_once $__dir . '/HTMLPurifier/HTMLModuleManager.php';
require_once $__dir . '/HTMLPurifier/IDAccumulator.php';
require_once $__dir . '/HTMLPurifier/Injector.php';
require_once $__dir . '/HTMLPurifier/Language.php';
require_once $__dir . '/HTMLPurifier/LanguageFactory.php';
require_once $__dir . '/HTMLPurifier/Length.php';
require_once $__dir . '/HTMLPurifier/Lexer.php';
require_once $__dir . '/HTMLPurifier/PercentEncoder.php';
require_once $__dir . '/HTMLPurifier/PropertyList.php';
require_once $__dir . '/HTMLPurifier/PropertyListIterator.php';
require_once $__dir . '/HTMLPurifier/Strategy.php';
require_once $__dir . '/HTMLPurifier/StringHash.php';
require_once $__dir . '/HTMLPurifier/StringHashParser.php';
require_once $__dir . '/HTMLPurifier/TagTransform.php';
require_once $__dir . '/HTMLPurifier/Token.php';
require_once $__dir . '/HTMLPurifier/TokenFactory.php';
require_once $__dir . '/HTMLPurifier/URI.php';
require_once $__dir . '/HTMLPurifier/URIDefinition.php';
require_once $__dir . '/HTMLPurifier/URIFilter.php';
require_once $__dir . '/HTMLPurifier/URIParser.php';
require_once $__dir . '/HTMLPurifier/URIScheme.php';
require_once $__dir . '/HTMLPurifier/URISchemeRegistry.php';
require_once $__dir . '/HTMLPurifier/UnitConverter.php';
require_once $__dir . '/HTMLPurifier/VarParser.php';
require_once $__dir . '/HTMLPurifier/VarParserException.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS.php';
require_once $__dir . '/HTMLPurifier/AttrDef/Enum.php';
require_once $__dir . '/HTMLPurifier/AttrDef/Integer.php';
require_once $__dir . '/HTMLPurifier/AttrDef/Lang.php';
require_once $__dir . '/HTMLPurifier/AttrDef/Switch.php';
require_once $__dir . '/HTMLPurifier/AttrDef/Text.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Number.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/AlphaValue.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Background.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/BackgroundPosition.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Border.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Color.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Composite.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/DenyElementDecorator.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Filter.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Font.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/FontFamily.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ImportantDecorator.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Length.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/ListStyle.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Multiple.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/Percentage.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/TextDecoration.php';
require_once $__dir . '/HTMLPurifier/AttrDef/CSS/URI.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Bool.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Nmtokens.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Class.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Color.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/FrameTarget.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/ID.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Pixels.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/Length.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/LinkTypes.php';
require_once $__dir . '/HTMLPurifier/AttrDef/HTML/MultiLength.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI/Email.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI/Host.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI/IPv4.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI/IPv6.php';
require_once $__dir . '/HTMLPurifier/AttrDef/URI/Email/SimpleCheck.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Background.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/BdoDir.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/BgColor.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/BoolToCSS.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Border.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/EnumToCSS.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/ImgRequired.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/ImgSpace.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Input.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Lang.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Length.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Name.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/NameSync.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Nofollow.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/SafeEmbed.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/SafeObject.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/SafeParam.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/ScriptRequired.php';
require_once $__dir . '/HTMLPurifier/AttrTransform/Textarea.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Chameleon.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Custom.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Empty.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Required.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Optional.php';
require_once $__dir . '/HTMLPurifier/ChildDef/StrictBlockquote.php';
require_once $__dir . '/HTMLPurifier/ChildDef/Table.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache/Null.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache/Serializer.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator/Cleanup.php';
require_once $__dir . '/HTMLPurifier/DefinitionCache/Decorator/Memory.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Bdo.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/CommonAttributes.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Edit.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Forms.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Hypertext.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Image.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Legacy.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/List.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Name.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Nofollow.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/NonXMLCommonAttributes.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Object.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Presentation.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Proprietary.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Ruby.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/SafeEmbed.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/SafeObject.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Scripting.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/StyleAttribute.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tables.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Target.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Text.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/XMLCommonAttributes.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Name.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Proprietary.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Strict.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/Transitional.php';
require_once $__dir . '/HTMLPurifier/HTMLModule/Tidy/XHTML.php';
require_once $__dir . '/HTMLPurifier/Injector/AutoParagraph.php';
require_once $__dir . '/HTMLPurifier/Injector/DisplayLinkURI.php';
require_once $__dir . '/HTMLPurifier/Injector/Linkify.php';
require_once $__dir . '/HTMLPurifier/Injector/PurifierLinkify.php';
require_once $__dir . '/HTMLPurifier/Injector/RemoveEmpty.php';
require_once $__dir . '/HTMLPurifier/Injector/RemoveSpansWithoutAttributes.php';
require_once $__dir . '/HTMLPurifier/Injector/SafeObject.php';
require_once $__dir . '/HTMLPurifier/Lexer/DOMLex.php';
require_once $__dir . '/HTMLPurifier/Lexer/DirectLex.php';
require_once $__dir . '/HTMLPurifier/Strategy/Composite.php';
require_once $__dir . '/HTMLPurifier/Strategy/Core.php';
require_once $__dir . '/HTMLPurifier/Strategy/FixNesting.php';
require_once $__dir . '/HTMLPurifier/Strategy/MakeWellFormed.php';
require_once $__dir . '/HTMLPurifier/Strategy/RemoveForeignElements.php';
require_once $__dir . '/HTMLPurifier/Strategy/ValidateAttributes.php';
require_once $__dir . '/HTMLPurifier/TagTransform/Font.php';
require_once $__dir . '/HTMLPurifier/TagTransform/Simple.php';
require_once $__dir . '/HTMLPurifier/Token/Comment.php';
require_once $__dir . '/HTMLPurifier/Token/Tag.php';
require_once $__dir . '/HTMLPurifier/Token/Empty.php';
require_once $__dir . '/HTMLPurifier/Token/End.php';
require_once $__dir . '/HTMLPurifier/Token/Start.php';
require_once $__dir . '/HTMLPurifier/Token/Text.php';
require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternal.php';
require_once $__dir . '/HTMLPurifier/URIFilter/DisableExternalResources.php';
require_once $__dir . '/HTMLPurifier/URIFilter/DisableResources.php';
require_once $__dir . '/HTMLPurifier/URIFilter/HostBlacklist.php';
require_once $__dir . '/HTMLPurifier/URIFilter/MakeAbsolute.php';
require_once $__dir . '/HTMLPurifier/URIFilter/Munge.php';
require_once $__dir . '/HTMLPurifier/URIScheme/data.php';
require_once $__dir . '/HTMLPurifier/URIScheme/file.php';
require_once $__dir . '/HTMLPurifier/URIScheme/ftp.php';
require_once $__dir . '/HTMLPurifier/URIScheme/http.php';
require_once $__dir . '/HTMLPurifier/URIScheme/https.php';
require_once $__dir . '/HTMLPurifier/URIScheme/mailto.php';
require_once $__dir . '/HTMLPurifier/URIScheme/news.php';
require_once $__dir . '/HTMLPurifier/URIScheme/nntp.php';
require_once $__dir . '/HTMLPurifier/VarParser/Flexible.php';
require_once $__dir . '/HTMLPurifier/VarParser/Native.php';

197
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/FontFamily.php Executable file
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<?php
/**
* Validates a font family list according to CSS spec
*/
class HTMLPurifier_AttrDef_CSS_FontFamily extends HTMLPurifier_AttrDef
{
protected $mask = null;
public function __construct() {
$this->mask = '- ';
for ($c = 'a'; $c <= 'z'; $c++) $this->mask .= $c;
for ($c = 'A'; $c <= 'Z'; $c++) $this->mask .= $c;
for ($c = '0'; $c <= '9'; $c++) $this->mask .= $c; // cast-y, but should be fine
// special bytes used by UTF-8
for ($i = 0x80; $i <= 0xFF; $i++) {
// We don't bother excluding invalid bytes in this range,
// because the our restriction of well-formed UTF-8 will
// prevent these from ever occurring.
$this->mask .= chr($i);
}
/*
PHP's internal strcspn implementation is
O(length of string * length of mask), making it inefficient
for large masks. However, it's still faster than
preg_match 8)
for (p = s1;;) {
spanp = s2;
do {
if (*spanp == c || p == s1_end) {
return p - s1;
}
} while (spanp++ < (s2_end - 1));
c = *++p;
}
*/
// possible optimization: invert the mask.
}
public function validate($string, $config, $context) {
static $generic_names = array(
'serif' => true,
'sans-serif' => true,
'monospace' => true,
'fantasy' => true,
'cursive' => true
);
$allowed_fonts = $config->get('CSS.AllowedFonts');
// assume that no font names contain commas in them
$fonts = explode(',', $string);
$final = '';
foreach($fonts as $font) {
$font = trim($font);
if ($font === '') continue;
// match a generic name
if (isset($generic_names[$font])) {
if ($allowed_fonts === null || isset($allowed_fonts[$font])) {
$final .= $font . ', ';
}
continue;
}
// match a quoted name
if ($font[0] === '"' || $font[0] === "'") {
$length = strlen($font);
if ($length <= 2) continue;
$quote = $font[0];
if ($font[$length - 1] !== $quote) continue;
$font = substr($font, 1, $length - 2);
}
$font = $this->expandCSSEscape($font);
// $font is a pure representation of the font name
if ($allowed_fonts !== null && !isset($allowed_fonts[$font])) {
continue;
}
if (ctype_alnum($font) && $font !== '') {
// very simple font, allow it in unharmed
$final .= $font . ', ';
continue;
}
// bugger out on whitespace. form feed (0C) really
// shouldn't show up regardless
$font = str_replace(array("\n", "\t", "\r", "\x0C"), ' ', $font);
// Here, there are various classes of characters which need
// to be treated differently:
// - Alphanumeric characters are essentially safe. We
// handled these above.
// - Spaces require quoting, though most parsers will do
// the right thing if there aren't any characters that
// can be misinterpreted
// - Dashes rarely occur, but they fairly unproblematic
// for parsing/rendering purposes.
// The above characters cover the majority of Western font
// names.
// - Arbitrary Unicode characters not in ASCII. Because
// most parsers give little thought to Unicode, treatment
// of these codepoints is basically uniform, even for
// punctuation-like codepoints. These characters can
// show up in non-Western pages and are supported by most
// major browsers, for example: "ＭＳ 明朝" is a
// legitimate font-name
// <http://ja.wikipedia.org/wiki/MS_明朝>. See
// the CSS3 spec for more examples:
// <http://www.w3.org/TR/2011/WD-css3-fonts-20110324/localizedfamilynames.png>
// You can see live samples of these on the Internet:
// <http://www.google.co.jp/search?q=font-family+ＭＳ+明朝|ゴシック>
// However, most of these fonts have ASCII equivalents:
// for example, 'MS Mincho', and it's considered
// professional to use ASCII font names instead of
// Unicode font names. Thanks Takeshi Terada for
// providing this information.
// The following characters, to my knowledge, have not been
// used to name font names.
// - Single quote. While theoretically you might find a
// font name that has a single quote in its name (serving
// as an apostrophe, e.g. Dave's Scribble), I haven't
// been able to find any actual examples of this.
// Internet Explorer's cssText translation (which I
// believe is invoked by innerHTML) normalizes any
// quoting to single quotes, and fails to escape single
// quotes. (Note that this is not IE's behavior for all
// CSS properties, just some sort of special casing for
// font-family). So a single quote *cannot* be used
// safely in the font-family context if there will be an
// innerHTML/cssText translation. Note that Firefox 3.x
// does this too.
// - Double quote. In IE, these get normalized to
// single-quotes, no matter what the encoding. (Fun
// fact, in IE8, the 'content' CSS property gained
// support, where they special cased to preserve encoded
// double quotes, but still translate unadorned double
// quotes into single quotes.) So, because their
// fixpoint behavior is identical to single quotes, they
// cannot be allowed either. Firefox 3.x displays
// single-quote style behavior.
// - Backslashes are reduced by one (so \\ -> \) every
// iteration, so they cannot be used safely. This shows
// up in IE7, IE8 and FF3
// - Semicolons, commas and backticks are handled properly.
// - The rest of the ASCII punctuation is handled properly.
// We haven't checked what browsers do to unadorned
// versions, but this is not important as long as the
// browser doesn't /remove/ surrounding quotes (as IE does
// for HTML).
//
// With these results in hand, we conclude that there are
// various levels of safety:
// - Paranoid: alphanumeric, spaces and dashes(?)
// - International: Paranoid + non-ASCII Unicode
// - Edgy: Everything except quotes, backslashes
// - NoJS: Standards compliance, e.g. sod IE. Note that
// with some judicious character escaping (since certain
// types of escaping doesn't work) this is theoretically
// OK as long as innerHTML/cssText is not called.
// We believe that international is a reasonable default
// (that we will implement now), and once we do more
// extensive research, we may feel comfortable with dropping
// it down to edgy.
// Edgy: alphanumeric, spaces, dashes and Unicode. Use of
// str(c)spn assumes that the string was already well formed
// Unicode (which of course it is).
if (strspn($font, $this->mask) !== strlen($font)) {
continue;
}
// Historical:
// In the absence of innerHTML/cssText, these ugly
// transforms don't pose a security risk (as \\ and \"
// might--these escapes are not supported by most browsers).
// We could try to be clever and use single-quote wrapping
// when there is a double quote present, but I have choosen
// not to implement that. (NOTE: you can reduce the amount
// of escapes by one depending on what quoting style you use)
// $font = str_replace('\\', '\\5C ', $font);
// $font = str_replace('"', '\\22 ', $font);
// $font = str_replace("'", '\\27 ', $font);
// font possibly with spaces, requires quoting
$final .= "'$font', ";
}
$final = rtrim($final, ', ');
if ($final === '') return false;
return $final;
}
}
// vim: et sw=4 sts=4

61
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/URI.php Executable file
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<?php
/**
* Validates a URI in CSS syntax, which uses url('http://example.com')
* @note While theoretically speaking a URI in a CSS document could
* be non-embedded, as of CSS2 there is no such usage so we're
* generalizing it. This may need to be changed in the future.
* @warning Since HTMLPurifier_AttrDef_CSS blindly uses semicolons as
* the separator, you cannot put a literal semicolon in
* in the URI. Try percent encoding it, in that case.
*/
class HTMLPurifier_AttrDef_CSS_URI extends HTMLPurifier_AttrDef_URI
{
public function __construct() {
parent::__construct(true); // always embedded
}
public function validate($uri_string, $config, $context) {
// parse the URI out of the string and then pass it onto
// the parent object
$uri_string = $this->parseCDATA($uri_string);
if (strpos($uri_string, 'url(') !== 0) return false;
$uri_string = substr($uri_string, 4);
$new_length = strlen($uri_string) - 1;
if ($uri_string[$new_length] != ')') return false;
$uri = trim(substr($uri_string, 0, $new_length));
if (!empty($uri) && ($uri[0] == "'" || $uri[0] == '"')) {
$quote = $uri[0];
$new_length = strlen($uri) - 1;
if ($uri[$new_length] !== $quote) return false;
$uri = substr($uri, 1, $new_length - 1);
}
$uri = $this->expandCSSEscape($uri);
$result = parent::validate($uri, $config, $context);
if ($result === false) return false;
// extra sanity check; should have been done by URI
$result = str_replace(array('"', "\\", "\n", "\x0c", "\r"), "", $result);
// suspicious characters are ()'; we're going to percent encode
// them for safety.
$result = str_replace(array('(', ')', "'"), array('%28', '%29', '%27'), $result);
// there's an extra bug where ampersands lose their escaping on
// an innerHTML cycle, so a very unlucky query parameter could
// then change the meaning of the URL. Unfortunately, there's
// not much we can do about that...
return "url(\"$result\")";
}
}
// vim: et sw=4 sts=4

68
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/AttrDef/URI/Host.php Executable file
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<?php
/**
* Validates a host according to the IPv4, IPv6 and DNS (future) specifications.
*/
class HTMLPurifier_AttrDef_URI_Host extends HTMLPurifier_AttrDef
{
/**
* Instance of HTMLPurifier_AttrDef_URI_IPv4 sub-validator
*/
protected $ipv4;
/**
* Instance of HTMLPurifier_AttrDef_URI_IPv6 sub-validator
*/
protected $ipv6;
public function __construct() {
$this->ipv4 = new HTMLPurifier_AttrDef_URI_IPv4();
$this->ipv6 = new HTMLPurifier_AttrDef_URI_IPv6();
}
public function validate($string, $config, $context) {
$length = strlen($string);
// empty hostname is OK; it's usually semantically equivalent:
// the default host as defined by a URI scheme is used:
//
// If the URI scheme defines a default for host, then that
// default applies when the host subcomponent is undefined
// or when the registered name is empty (zero length).
if ($string === '') return '';
if ($length > 1 && $string[0] === '[' && $string[$length-1] === ']') {
//IPv6
$ip = substr($string, 1, $length - 2);
$valid = $this->ipv6->validate($ip, $config, $context);
if ($valid === false) return false;
return '['. $valid . ']';
}
// need to do checks on unusual encodings too
$ipv4 = $this->ipv4->validate($string, $config, $context);
if ($ipv4 !== false) return $ipv4;
// A regular domain name.
// This breaks I18N domain names, but we don't have proper IRI support,
// so force users to insert Punycode. If there's complaining we'll
// try to fix things into an international friendly form.
// The productions describing this are:
$a = '[a-z]'; // alpha
$an = '[a-z0-9]'; // alphanum
$and = '[a-z0-9-]'; // alphanum | "-"
// domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
$domainlabel = "$an($and*$an)?";
// toplabel = alpha | alpha *( alphanum | "-" ) alphanum
$toplabel = "$a($and*$an)?";
// hostname = *( domainlabel "." ) toplabel [ "." ]
$match = preg_match("/^($domainlabel\.)*$toplabel\.?$/i", $string);
if (!$match) return false;
return $string;
}
}
// vim: et sw=4 sts=4

41
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/AttrTransform/Nofollow.php Normal file
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<?php
// must be called POST validation
/**
* Adds rel="nofollow" to all outbound links. This transform is
* only attached if Attr.Nofollow is TRUE.
*/
class HTMLPurifier_AttrTransform_Nofollow extends HTMLPurifier_AttrTransform
{
private $parser;
public function __construct() {
$this->parser = new HTMLPurifier_URIParser();
}
public function transform($attr, $config, $context) {
if (!isset($attr['href'])) {
return $attr;
}
// XXX Kind of inefficient
$url = $this->parser->parse($attr['href']);
$scheme = $url->getSchemeObj($config, $context);
if (!is_null($url->host) && $scheme !== false && $scheme->browsable) {
if (isset($attr['rel'])) {
$attr['rel'] .= ' nofollow';
} else {
$attr['rel'] = 'nofollow';
}
}
return $attr;
}
}
// vim: et sw=4 sts=4

64
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/AttrTransform/SafeParam.php Executable file
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<?php
/**
* Validates name/value pairs in param tags to be used in safe objects. This
* will only allow name values it recognizes, and pre-fill certain attributes
* with required values.
*
* @note
* This class only supports Flash. In the future, Quicktime support
* may be added.
*
* @warning
* This class expects an injector to add the necessary parameters tags.
*/
class HTMLPurifier_AttrTransform_SafeParam extends HTMLPurifier_AttrTransform
{
public $name = "SafeParam";
private $uri;
public function __construct() {
$this->uri = new HTMLPurifier_AttrDef_URI(true); // embedded
$this->wmode = new HTMLPurifier_AttrDef_Enum(array('window', 'opaque', 'transparent'));
}
public function transform($attr, $config, $context) {
// If we add support for other objects, we'll need to alter the
// transforms.
switch ($attr['name']) {
// application/x-shockwave-flash
// Keep this synchronized with Injector/SafeObject.php
case 'allowScriptAccess':
$attr['value'] = 'never';
break;
case 'allowNetworking':
$attr['value'] = 'internal';
break;
case 'allowFullScreen':
if ($config->get('HTML.FlashAllowFullScreen')) {
$attr['value'] = ($attr['value'] == 'true') ? 'true' : 'false';
} else {
$attr['value'] = 'false';
}
break;
case 'wmode':
$attr['value'] = $this->wmode->validate($attr['value'], $config, $context);
break;
case 'movie':
case 'src':
$attr['name'] = "movie";
$attr['value'] = $this->uri->validate($attr['value'], $config, $context);
break;
case 'flashvars':
// we're going to allow arbitrary inputs to the SWF, on
// the reasoning that it could only hack the SWF, not us.
break;
// add other cases to support other param name/value pairs
default:
$attr['name'] = $attr['value'] = null;
}
return $attr;
}
}
// vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Bootstrap.php Executable file
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<?php
// constants are slow, so we use as few as possible
if (!defined('HTMLPURIFIER_PREFIX')) {
define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));
}
// accomodations for versions earlier than 5.0.2
// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>
if (!defined('PHP_EOL')) {
switch (strtoupper(substr(PHP_OS, 0, 3))) {
case 'WIN':
define('PHP_EOL', "\r\n");
break;
case 'DAR':
define('PHP_EOL', "\r");
break;
default:
define('PHP_EOL', "\n");
}
}
/**
* Bootstrap class that contains meta-functionality for HTML Purifier such as
* the autoload function.
*
* @note
* This class may be used without any other files from HTML Purifier.
*/
class HTMLPurifier_Bootstrap
{
/**
* Autoload function for HTML Purifier
* @param $class Class to load
*/
public static function autoload($class) {
$file = HTMLPurifier_Bootstrap::getPath($class);
if (!$file) return false;
// Technically speaking, it should be ok and more efficient to
// just do 'require', but Antonio Parraga reports that with
// Zend extensions such as Zend debugger and APC, this invariant
// may be broken. Since we have efficient alternatives, pay
// the cost here and avoid the bug.
require_once HTMLPURIFIER_PREFIX . '/' . $file;
return true;
}
/**
* Returns the path for a specific class.
*/
public static function getPath($class) {
if (strncmp('HTMLPurifier', $class, 12) !== 0) return false;
// Custom implementations
if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {
$code = str_replace('_', '-', substr($class, 22));
$file = 'HTMLPurifier/Language/classes/' . $code . '.php';
} else {
$file = str_replace('_', '/', $class) . '.php';
}
if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) return false;
return $file;
}
/**
* "Pre-registers" our autoloader on the SPL stack.
*/
public static function registerAutoload() {
$autoload = array('HTMLPurifier_Bootstrap', 'autoload');
if ( ($funcs = spl_autoload_functions()) === false ) {
spl_autoload_register($autoload);
} elseif (function_exists('spl_autoload_unregister')) {
$buggy = version_compare(PHP_VERSION, '5.2.11', '<');
$compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&
version_compare(PHP_VERSION, '5.1.0', '>=');
foreach ($funcs as $func) {
if ($buggy && is_array($func)) {
// :TRICKY: There are some compatibility issues and some
// places where we need to error out
$reflector = new ReflectionMethod($func[0], $func[1]);
if (!$reflector->isStatic()) {
throw new Exception('
HTML Purifier autoloader registrar is not compatible
with non-static object methods due to PHP Bug #44144;
Please do not use HTMLPurifier.autoload.php (or any
file that includes this file); instead, place the code:
spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))
after your own autoloaders.
');
}
// Suprisingly, spl_autoload_register supports the
// Class::staticMethod callback format, although call_user_func doesn't
if ($compat) $func = implode('::', $func);
}
spl_autoload_unregister($func);
}
spl_autoload_register($autoload);
foreach ($funcs as $func) spl_autoload_register($func);
}
}
}
// vim: et sw=4 sts=4

322
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/CSSDefinition.php Executable file
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<?php
/**
* Defines allowed CSS attributes and what their values are.
* @see HTMLPurifier_HTMLDefinition
*/
class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
{
public $type = 'CSS';
/**
* Assoc array of attribute name to definition object.
*/
public $info = array();
/**
* Constructs the info array. The meat of this class.
*/
protected function doSetup($config) {
$this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
array('left', 'right', 'center', 'justify'), false);
$border_style =
$this->info['border-bottom-style'] =
$this->info['border-right-style'] =
$this->info['border-left-style'] =
$this->info['border-top-style'] = new HTMLPurifier_AttrDef_Enum(
array('none', 'hidden', 'dotted', 'dashed', 'solid', 'double',
'groove', 'ridge', 'inset', 'outset'), false);
$this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);
$this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
array('none', 'left', 'right', 'both'), false);
$this->info['float'] = new HTMLPurifier_AttrDef_Enum(
array('none', 'left', 'right'), false);
$this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
array('normal', 'italic', 'oblique'), false);
$this->info['font-variant'] = new HTMLPurifier_AttrDef_Enum(
array('normal', 'small-caps'), false);
$uri_or_none = new HTMLPurifier_AttrDef_CSS_Composite(
array(
new HTMLPurifier_AttrDef_Enum(array('none')),
new HTMLPurifier_AttrDef_CSS_URI()
)
);
$this->info['list-style-position'] = new HTMLPurifier_AttrDef_Enum(
array('inside', 'outside'), false);
$this->info['list-style-type'] = new HTMLPurifier_AttrDef_Enum(
array('disc', 'circle', 'square', 'decimal', 'lower-roman',
'upper-roman', 'lower-alpha', 'upper-alpha', 'none'), false);
$this->info['list-style-image'] = $uri_or_none;
$this->info['list-style'] = new HTMLPurifier_AttrDef_CSS_ListStyle($config);
$this->info['text-transform'] = new HTMLPurifier_AttrDef_Enum(
array('capitalize', 'uppercase', 'lowercase', 'none'), false);
$this->info['color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['background-image'] = $uri_or_none;
$this->info['background-repeat'] = new HTMLPurifier_AttrDef_Enum(
array('repeat', 'repeat-x', 'repeat-y', 'no-repeat')
);
$this->info['background-attachment'] = new HTMLPurifier_AttrDef_Enum(
array('scroll', 'fixed')
);
$this->info['background-position'] = new HTMLPurifier_AttrDef_CSS_BackgroundPosition();
$border_color =
$this->info['border-top-color'] =
$this->info['border-bottom-color'] =
$this->info['border-left-color'] =
$this->info['border-right-color'] =
$this->info['background-color'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('transparent')),
new HTMLPurifier_AttrDef_CSS_Color()
));
$this->info['background'] = new HTMLPurifier_AttrDef_CSS_Background($config);
$this->info['border-color'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_color);
$border_width =
$this->info['border-top-width'] =
$this->info['border-bottom-width'] =
$this->info['border-left-width'] =
$this->info['border-right-width'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('thin', 'medium', 'thick')),
new HTMLPurifier_AttrDef_CSS_Length('0') //disallow negative
));
$this->info['border-width'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_width);
$this->info['letter-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('normal')),
new HTMLPurifier_AttrDef_CSS_Length()
));
$this->info['word-spacing'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('normal')),
new HTMLPurifier_AttrDef_CSS_Length()
));
$this->info['font-size'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('xx-small', 'x-small',
'small', 'medium', 'large', 'x-large', 'xx-large',
'larger', 'smaller')),
new HTMLPurifier_AttrDef_CSS_Percentage(),
new HTMLPurifier_AttrDef_CSS_Length()
));
$this->info['line-height'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('normal')),
new HTMLPurifier_AttrDef_CSS_Number(true), // no negatives
new HTMLPurifier_AttrDef_CSS_Length('0'),
new HTMLPurifier_AttrDef_CSS_Percentage(true)
));
$margin =
$this->info['margin-top'] =
$this->info['margin-bottom'] =
$this->info['margin-left'] =
$this->info['margin-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length(),
new HTMLPurifier_AttrDef_CSS_Percentage(),
new HTMLPurifier_AttrDef_Enum(array('auto'))
));
$this->info['margin'] = new HTMLPurifier_AttrDef_CSS_Multiple($margin);
// non-negative
$padding =
$this->info['padding-top'] =
$this->info['padding-bottom'] =
$this->info['padding-left'] =
$this->info['padding-right'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length('0'),
new HTMLPurifier_AttrDef_CSS_Percentage(true)
));
$this->info['padding'] = new HTMLPurifier_AttrDef_CSS_Multiple($padding);
$this->info['text-indent'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length(),
new HTMLPurifier_AttrDef_CSS_Percentage()
));
$trusted_wh = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length('0'),
new HTMLPurifier_AttrDef_CSS_Percentage(true),
new HTMLPurifier_AttrDef_Enum(array('auto'))
));
$max = $config->get('CSS.MaxImgLength');
$this->info['width'] =
$this->info['height'] =
$max === null ?
$trusted_wh :
new HTMLPurifier_AttrDef_Switch('img',
// For img tags:
new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length('0', $max),
new HTMLPurifier_AttrDef_Enum(array('auto'))
)),
// For everyone else:
$trusted_wh
);
$this->info['text-decoration'] = new HTMLPurifier_AttrDef_CSS_TextDecoration();
$this->info['font-family'] = new HTMLPurifier_AttrDef_CSS_FontFamily();
// this could use specialized code
$this->info['font-weight'] = new HTMLPurifier_AttrDef_Enum(
array('normal', 'bold', 'bolder', 'lighter', '100', '200', '300',
'400', '500', '600', '700', '800', '900'), false);
// MUST be called after other font properties, as it references
// a CSSDefinition object
$this->info['font'] = new HTMLPurifier_AttrDef_CSS_Font($config);
// same here
$this->info['border'] =
$this->info['border-bottom'] =
$this->info['border-top'] =
$this->info['border-left'] =
$this->info['border-right'] = new HTMLPurifier_AttrDef_CSS_Border($config);
$this->info['border-collapse'] = new HTMLPurifier_AttrDef_Enum(array(
'collapse', 'separate'));
$this->info['caption-side'] = new HTMLPurifier_AttrDef_Enum(array(
'top', 'bottom'));
$this->info['table-layout'] = new HTMLPurifier_AttrDef_Enum(array(
'auto', 'fixed'));
$this->info['vertical-align'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Enum(array('baseline', 'sub', 'super',
'top', 'text-top', 'middle', 'bottom', 'text-bottom')),
new HTMLPurifier_AttrDef_CSS_Length(),
new HTMLPurifier_AttrDef_CSS_Percentage()
));
$this->info['border-spacing'] = new HTMLPurifier_AttrDef_CSS_Multiple(new HTMLPurifier_AttrDef_CSS_Length(), 2);
// partial support
$this->info['white-space'] = new HTMLPurifier_AttrDef_Enum(array('nowrap'));
if ($config->get('CSS.Proprietary')) {
$this->doSetupProprietary($config);
}
if ($config->get('CSS.AllowTricky')) {
$this->doSetupTricky($config);
}
if ($config->get('CSS.Trusted')) {
$this->doSetupTrusted($config);
}
$allow_important = $config->get('CSS.AllowImportant');
// wrap all attr-defs with decorator that handles !important
foreach ($this->info as $k => $v) {
$this->info[$k] = new HTMLPurifier_AttrDef_CSS_ImportantDecorator($v, $allow_important);
}
$this->setupConfigStuff($config);
}
protected function doSetupProprietary($config) {
// Internet Explorer only scrollbar colors
$this->info['scrollbar-arrow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['scrollbar-base-color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['scrollbar-darkshadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['scrollbar-face-color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['scrollbar-highlight-color'] = new HTMLPurifier_AttrDef_CSS_Color();
$this->info['scrollbar-shadow-color'] = new HTMLPurifier_AttrDef_CSS_Color();
// technically not proprietary, but CSS3, and no one supports it
$this->info['opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
$this->info['-moz-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
$this->info['-khtml-opacity'] = new HTMLPurifier_AttrDef_CSS_AlphaValue();
// only opacity, for now
$this->info['filter'] = new HTMLPurifier_AttrDef_CSS_Filter();
}
protected function doSetupTricky($config) {
$this->info['display'] = new HTMLPurifier_AttrDef_Enum(array(
'inline', 'block', 'list-item', 'run-in', 'compact',
'marker', 'table', 'inline-table', 'table-row-group',
'table-header-group', 'table-footer-group', 'table-row',
'table-column-group', 'table-column', 'table-cell', 'table-caption', 'none'
));
$this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(array(
'visible', 'hidden', 'collapse'
));
$this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
}
protected function doSetupTrusted($config) {
$this->info['position'] = new HTMLPurifier_AttrDef_Enum(array(
'static', 'relative', 'absolute', 'fixed'
));
$this->info['top'] =
$this->info['left'] =
$this->info['right'] =
$this->info['bottom'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_CSS_Length(),
new HTMLPurifier_AttrDef_CSS_Percentage(),
new HTMLPurifier_AttrDef_Enum(array('auto')),
));
$this->info['z-index'] = new HTMLPurifier_AttrDef_CSS_Composite(array(
new HTMLPurifier_AttrDef_Integer(),
new HTMLPurifier_AttrDef_Enum(array('auto')),
));
}
/**
* Performs extra config-based processing. Based off of
* HTMLPurifier_HTMLDefinition.
* @todo Refactor duplicate elements into common class (probably using
* composition, not inheritance).
*/
protected function setupConfigStuff($config) {
// setup allowed elements
$support = "(for information on implementing this, see the ".
"support forums) ";
$allowed_properties = $config->get('CSS.AllowedProperties');
if ($allowed_properties !== null) {
foreach ($this->info as $name => $d) {
if(!isset($allowed_properties[$name])) unset($this->info[$name]);
unset($allowed_properties[$name]);
}
// emit errors
foreach ($allowed_properties as $name => $d) {
// :TODO: Is this htmlspecialchars() call really necessary?
$name = htmlspecialchars($name);
trigger_error("Style attribute '$name' is not supported $support", E_USER_WARNING);
}
}
$forbidden_properties = $config->get('CSS.ForbiddenProperties');
if ($forbidden_properties !== null) {
foreach ($this->info as $name => $d) {
if (isset($forbidden_properties[$name])) {
unset($this->info[$name]);
}
}
}
}
}
// vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Config.php Executable file
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<?php
/**
* Configuration object that triggers customizable behavior.
*
* @warning This class is strongly defined: that means that the class
* will fail if an undefined directive is retrieved or set.
*
* @note Many classes that could (although many times don't) use the
* configuration object make it a mandatory parameter. This is
* because a configuration object should always be forwarded,
* otherwise, you run the risk of missing a parameter and then
* being stumped when a configuration directive doesn't work.
*
* @todo Reconsider some of the public member variables
*/
class HTMLPurifier_Config
{
/**
* HTML Purifier's version
*/
public $version = '4.3.0';
/**
* Bool indicator whether or not to automatically finalize
* the object if a read operation is done
*/
public $autoFinalize = true;
// protected member variables
/**
* Namespace indexed array of serials for specific namespaces (see
* getSerial() for more info).
*/
protected $serials = array();
/**
* Serial for entire configuration object
*/
protected $serial;
/**
* Parser for variables
*/
protected $parser;
/**
* Reference HTMLPurifier_ConfigSchema for value checking
* @note This is public for introspective purposes. Please don't
* abuse!
*/
public $def;
/**
* Indexed array of definitions
*/
protected $definitions;
/**
* Bool indicator whether or not config is finalized
*/
protected $finalized = false;
/**
* Property list containing configuration directives.
*/
protected $plist;
/**
* Whether or not a set is taking place due to an
* alias lookup.
*/
private $aliasMode;
/**
* Set to false if you do not want line and file numbers in errors
* (useful when unit testing). This will also compress some errors
* and exceptions.
*/
public $chatty = true;
/**
* Current lock; only gets to this namespace are allowed.
*/
private $lock;
/**
* @param $definition HTMLPurifier_ConfigSchema that defines what directives
* are allowed.
*/
public function __construct($definition, $parent = null) {
$parent = $parent ? $parent : $definition->defaultPlist;
$this->plist = new HTMLPurifier_PropertyList($parent);
$this->def = $definition; // keep a copy around for checking
$this->parser = new HTMLPurifier_VarParser_Flexible();
}
/**
* Convenience constructor that creates a config object based on a mixed var
* @param mixed $config Variable that defines the state of the config
* object. Can be: a HTMLPurifier_Config() object,
* an array of directives based on loadArray(),
* or a string filename of an ini file.
* @param HTMLPurifier_ConfigSchema Schema object
* @return Configured HTMLPurifier_Config object
*/
public static function create($config, $schema = null) {
if ($config instanceof HTMLPurifier_Config) {
// pass-through
return $config;
}
if (!$schema) {
$ret = HTMLPurifier_Config::createDefault();
} else {
$ret = new HTMLPurifier_Config($schema);
}
if (is_string($config)) $ret->loadIni($config);
elseif (is_array($config)) $ret->loadArray($config);
return $ret;
}
/**
* Creates a new config object that inherits from a previous one.
* @param HTMLPurifier_Config $config Configuration object to inherit
* from.
* @return HTMLPurifier_Config object with $config as its parent.
*/
public static function inherit(HTMLPurifier_Config $config) {
return new HTMLPurifier_Config($config->def, $config->plist);
}
/**
* Convenience constructor that creates a default configuration object.
* @return Default HTMLPurifier_Config object.
*/
public static function createDefault() {
$definition = HTMLPurifier_ConfigSchema::instance();
$config = new HTMLPurifier_Config($definition);
return $config;
}
/**
* Retreives a value from the configuration.
* @param $key String key
*/
public function get($key, $a = null) {
if ($a !== null) {
$this->triggerError("Using deprecated API: use \$config->get('$key.$a') instead", E_USER_WARNING);
$key = "$key.$a";
}
if (!$this->finalized) $this->autoFinalize();
if (!isset($this->def->info[$key])) {
// can't add % due to SimpleTest bug
$this->triggerError('Cannot retrieve value of undefined directive ' . htmlspecialchars($key),
E_USER_WARNING);
return;
}
if (isset($this->def->info[$key]->isAlias)) {
$d = $this->def->info[$key];
$this->triggerError('Cannot get value from aliased directive, use real name ' . $d->key,
E_USER_ERROR);
return;
}
if ($this->lock) {
list($ns) = explode('.', $key);
if ($ns !== $this->lock) {
$this->triggerError('Cannot get value of namespace ' . $ns . ' when lock for ' . $this->lock . ' is active, this probably indicates a Definition setup method is accessing directives that are not within its namespace', E_USER_ERROR);
return;
}
}
return $this->plist->get($key);
}
/**
* Retreives an array of directives to values from a given namespace
* @param $namespace String namespace
*/
public function getBatch($namespace) {
if (!$this->finalized) $this->autoFinalize();
$full = $this->getAll();
if (!isset($full[$namespace])) {
$this->triggerError('Cannot retrieve undefined namespace ' . htmlspecialchars($namespace),
E_USER_WARNING);
return;
}
return $full[$namespace];
}
/**
* Returns a md5 signature of a segment of the configuration object
* that uniquely identifies that particular configuration
* @note Revision is handled specially and is removed from the batch
* before processing!
* @param $namespace Namespace to get serial for
*/
public function getBatchSerial($namespace) {
if (empty($this->serials[$namespace])) {
$batch = $this->getBatch($namespace);
unset($batch['DefinitionRev']);
$this->serials[$namespace] = md5(serialize($batch));
}
return $this->serials[$namespace];
}
/**
* Returns a md5 signature for the entire configuration object
* that uniquely identifies that particular configuration
*/
public function getSerial() {
if (empty($this->serial)) {
$this->serial = md5(serialize($this->getAll()));
}
return $this->serial;
}
/**
* Retrieves all directives, organized by namespace
* @warning This is a pretty inefficient function, avoid if you can
*/
public function getAll() {
if (!$this->finalized) $this->autoFinalize();
$ret = array();
foreach ($this->plist->squash() as $name => $value) {
list($ns, $key) = explode('.', $name, 2);
$ret[$ns][$key] = $value;
}
return $ret;
}
/**
* Sets a value to configuration.
* @param $key String key
* @param $value Mixed value
*/
public function set($key, $value, $a = null) {
if (strpos($key, '.') === false) {
$namespace = $key;
$directive = $value;
$value = $a;
$key = "$key.$directive";
$this->triggerError("Using deprecated API: use \$config->set('$key', ...) instead", E_USER_NOTICE);
} else {
list($namespace) = explode('.', $key);
}
if ($this->isFinalized('Cannot set directive after finalization')) return;
if (!isset($this->def->info[$key])) {
$this->triggerError('Cannot set undefined directive ' . htmlspecialchars($key) . ' to value',
E_USER_WARNING);
return;
}
$def = $this->def->info[$key];
if (isset($def->isAlias)) {
if ($this->aliasMode) {
$this->triggerError('Double-aliases not allowed, please fix '.
'ConfigSchema bug with' . $key, E_USER_ERROR);
return;
}
$this->aliasMode = true;
$this->set($def->key, $value);
$this->aliasMode = false;
$this->triggerError("$key is an alias, preferred directive name is {$def->key}", E_USER_NOTICE);
return;
}
// Raw type might be negative when using the fully optimized form
// of stdclass, which indicates allow_null == true
$rtype = is_int($def) ? $def : $def->type;
if ($rtype < 0) {
$type = -$rtype;
$allow_null = true;
} else {
$type = $rtype;
$allow_null = isset($def->allow_null);
}
try {
$value = $this->parser->parse($value, $type, $allow_null);
} catch (HTMLPurifier_VarParserException $e) {
$this->triggerError('Value for ' . $key . ' is of invalid type, should be ' . HTMLPurifier_VarParser::getTypeName($type), E_USER_WARNING);
return;
}
if (is_string($value) && is_object($def)) {
// resolve value alias if defined
if (isset($def->aliases[$value])) {
$value = $def->aliases[$value];
}
// check to see if the value is allowed
if (isset($def->allowed) && !isset($def->allowed[$value])) {
$this->triggerError('Value not supported, valid values are: ' .
$this->_listify($def->allowed), E_USER_WARNING);
return;
}
}
$this->plist->set($key, $value);
// reset definitions if the directives they depend on changed
// this is a very costly process, so it's discouraged
// with finalization
if ($namespace == 'HTML' || $namespace == 'CSS' || $namespace == 'URI') {
$this->definitions[$namespace] = null;
}
$this->serials[$namespace] = false;
}
/**
* Convenience function for error reporting
*/
private function _listify($lookup) {
$list = array();
foreach ($lookup as $name => $b) $list[] = $name;
return implode(', ', $list);
}
/**
* Retrieves object reference to the HTML definition.
* @param $raw Return a copy that has not been setup yet. Must be
* called before it's been setup, otherwise won't work.
* @param $optimized If true, this method may return null, to
* indicate that a cached version of the modified
* definition object is available and no further edits
* are necessary. Consider using
* maybeGetRawHTMLDefinition, which is more explicitly
* named, instead.
*/
public function getHTMLDefinition($raw = false, $optimized = false) {
return $this->getDefinition('HTML', $raw, $optimized);
}
/**
* Retrieves object reference to the CSS definition
* @param $raw Return a copy that has not been setup yet. Must be
* called before it's been setup, otherwise won't work.
* @param $optimized If true, this method may return null, to
* indicate that a cached version of the modified
* definition object is available and no further edits
* are necessary. Consider using
* maybeGetRawCSSDefinition, which is more explicitly
* named, instead.
*/
public function getCSSDefinition($raw = false, $optimized = false) {
return $this->getDefinition('CSS', $raw, $optimized);
}
/**
* Retrieves object reference to the URI definition
* @param $raw Return a copy that has not been setup yet. Must be
* called before it's been setup, otherwise won't work.
* @param $optimized If true, this method may return null, to
* indicate that a cached version of the modified
* definition object is available and no further edits
* are necessary. Consider using
* maybeGetRawURIDefinition, which is more explicitly
* named, instead.
*/
public function getURIDefinition($raw = false, $optimized = false) {
return $this->getDefinition('URI', $raw, $optimized);
}
/**
* Retrieves a definition
* @param $type Type of definition: HTML, CSS, etc
* @param $raw Whether or not definition should be returned raw
* @param $optimized Only has an effect when $raw is true. Whether
* or not to return null if the result is already present in
* the cache. This is off by default for backwards
* compatibility reasons, but you need to do things this
* way in order to ensure that caching is done properly.
* Check out enduser-customize.html for more details.
* We probably won't ever change this default, as much as the
* maybe semantics is the "right thing to do."
*/
public function getDefinition($type, $raw = false, $optimized = false) {
if ($optimized && !$raw) {
throw new HTMLPurifier_Exception("Cannot set optimized = true when raw = false");
}
if (!$this->finalized) $this->autoFinalize();
// temporarily suspend locks, so we can handle recursive definition calls
$lock = $this->lock;
$this->lock = null;
$factory = HTMLPurifier_DefinitionCacheFactory::instance();
$cache = $factory->create($type, $this);
$this->lock = $lock;
if (!$raw) {
// full definition
// ---------------
// check if definition is in memory
if (!empty($this->definitions[$type])) {
$def = $this->definitions[$type];
// check if the definition is setup
if ($def->setup) {
return $def;
} else {
$def->setup($this);
if ($def->optimized) $cache->add($def, $this);
return $def;
}
}
// check if definition is in cache
$def = $cache->get($this);
if ($def) {
// definition in cache, save to memory and return it
$this->definitions[$type] = $def;
return $def;
}
// initialize it
$def = $this->initDefinition($type);
// set it up
$this->lock = $type;
$def->setup($this);
$this->lock = null;
// save in cache
$cache->add($def, $this);
// return it
return $def;
} else {
// raw definition
// --------------
// check preconditions
$def = null;
if ($optimized) {
if (is_null($this->get($type . '.DefinitionID'))) {
// fatally error out if definition ID not set
throw new HTMLPurifier_Exception("Cannot retrieve raw version without specifying %$type.DefinitionID");
}
}
if (!empty($this->definitions[$type])) {
$def = $this->definitions[$type];
if ($def->setup && !$optimized) {
$extra = $this->chatty ? " (try moving this code block earlier in your initialization)" : "";
throw new HTMLPurifier_Exception("Cannot retrieve raw definition after it has already been setup" . $extra);
}
if ($def->optimized === null) {
$extra = $this->chatty ? " (try flushing your cache)" : "";
throw new HTMLPurifier_Exception("Optimization status of definition is unknown" . $extra);
}
if ($def->optimized !== $optimized) {
$msg = $optimized ? "optimized" : "unoptimized";
$extra = $this->chatty ? " (this backtrace is for the first inconsistent call, which was for a $msg raw definition)" : "";
throw new HTMLPurifier_Exception("Inconsistent use of optimized and unoptimized raw definition retrievals" . $extra);
}
}
// check if definition was in memory
if ($def) {
if ($def->setup) {
// invariant: $optimized === true (checked above)
return null;
} else {
return $def;
}
}
// if optimized, check if definition was in cache
// (because we do the memory check first, this formulation
// is prone to cache slamming, but I think
// guaranteeing that either /all/ of the raw
// setup code or /none/ of it is run is more important.)
if ($optimized) {
// This code path only gets run once; once we put
// something in $definitions (which is guaranteed by the
// trailing code), we always short-circuit above.
$def = $cache->get($this);
if ($def) {
// save the full definition for later, but don't
// return it yet
$this->definitions[$type] = $def;
return null;
}
}
// check invariants for creation
if (!$optimized) {
if (!is_null($this->get($type . '.DefinitionID'))) {
if ($this->chatty) {
$this->triggerError("Due to a documentation error in previous version of HTML Purifier, your definitions are not being cached. If this is OK, you can remove the %$type.DefinitionRev and %$type.DefinitionID declaration. Otherwise, modify your code to use maybeGetRawDefinition, and test if the returned value is null before making any edits (if it is null, that means that a cached version is available, and no raw operations are necessary). See <a href='http://htmlpurifier.org/docs/enduser-customize.html#optimized'>Customize</a> for more details", E_USER_WARNING);
} else {
$this->triggerError("Useless DefinitionID declaration", E_USER_WARNING);
}
}
}
// initialize it
$def = $this->initDefinition($type);
$def->optimized = $optimized;
return $def;
}
throw new HTMLPurifier_Exception("The impossible happened!");
}
private function initDefinition($type) {
// quick checks failed, let's create the object
if ($type == 'HTML') {
$def = new HTMLPurifier_HTMLDefinition();
} elseif ($type == 'CSS') {
$def = new HTMLPurifier_CSSDefinition();
} elseif ($type == 'URI') {
$def = new HTMLPurifier_URIDefinition();
} else {
throw new HTMLPurifier_Exception("Definition of $type type not supported");
}
$this->definitions[$type] = $def;
return $def;
}
public function maybeGetRawDefinition($name) {
return $this->getDefinition($name, true, true);
}
public function maybeGetRawHTMLDefinition() {
return $this->getDefinition('HTML', true, true);
}
public function maybeGetRawCSSDefinition() {
return $this->getDefinition('CSS', true, true);
}
public function maybeGetRawURIDefinition() {
return $this->getDefinition('URI', true, true);
}
/**
* Loads configuration values from an array with the following structure:
* Namespace.Directive => Value
* @param $config_array Configuration associative array
*/
public function loadArray($config_array) {
if ($this->isFinalized('Cannot load directives after finalization')) return;
foreach ($config_array as $key => $value) {
$key = str_replace('_', '.', $key);
if (strpos($key, '.') !== false) {
$this->set($key, $value);
} else {
$namespace = $key;
$namespace_values = $value;
foreach ($namespace_values as $directive => $value) {
$this->set($namespace .'.'. $directive, $value);
}
}
}
}
/**
* Returns a list of array(namespace, directive) for all directives
* that are allowed in a web-form context as per an allowed
* namespaces/directives list.
* @param $allowed List of allowed namespaces/directives
*/
public static function getAllowedDirectivesForForm($allowed, $schema = null) {
if (!$schema) {
$schema = HTMLPurifier_ConfigSchema::instance();
}
if ($allowed !== true) {
if (is_string($allowed)) $allowed = array($allowed);
$allowed_ns = array();
$allowed_directives = array();
$blacklisted_directives = array();
foreach ($allowed as $ns_or_directive) {
if (strpos($ns_or_directive, '.') !== false) {
// directive
if ($ns_or_directive[0] == '-') {
$blacklisted_directives[substr($ns_or_directive, 1)] = true;
} else {
$allowed_directives[$ns_or_directive] = true;
}
} else {
// namespace
$allowed_ns[$ns_or_directive] = true;
}
}
}
$ret = array();
foreach ($schema->info as $key => $def) {
list($ns, $directive) = explode('.', $key, 2);
if ($allowed !== true) {
if (isset($blacklisted_directives["$ns.$directive"])) continue;
if (!isset($allowed_directives["$ns.$directive"]) && !isset($allowed_ns[$ns])) continue;
}
if (isset($def->isAlias)) continue;
if ($directive == 'DefinitionID' || $directive == 'DefinitionRev') continue;
$ret[] = array($ns, $directive);
}
return $ret;
}
/**
* Loads configuration values from $_GET/$_POST that were posted
* via ConfigForm
* @param $array $_GET or $_POST array to import
* @param $index Index/name that the config variables are in
* @param $allowed List of allowed namespaces/directives
* @param $mq_fix Boolean whether or not to enable magic quotes fix
* @param $schema Instance of HTMLPurifier_ConfigSchema to use, if not global copy
*/
public static function loadArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
$ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $schema);
$config = HTMLPurifier_Config::create($ret, $schema);
return $config;
}
/**
* Merges in configuration values from $_GET/$_POST to object. NOT STATIC.
* @note Same parameters as loadArrayFromForm
*/
public function mergeArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true) {
$ret = HTMLPurifier_Config::prepareArrayFromForm($array, $index, $allowed, $mq_fix, $this->def);
$this->loadArray($ret);
}
/**
* Prepares an array from a form into something usable for the more
* strict parts of HTMLPurifier_Config
*/
public static function prepareArrayFromForm($array, $index = false, $allowed = true, $mq_fix = true, $schema = null) {
if ($index !== false) $array = (isset($array[$index]) && is_array($array[$index])) ? $array[$index] : array();
$mq = $mq_fix && function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc();
$allowed = HTMLPurifier_Config::getAllowedDirectivesForForm($allowed, $schema);
$ret = array();
foreach ($allowed as $key) {
list($ns, $directive) = $key;
$skey = "$ns.$directive";
if (!empty($array["Null_$skey"])) {
$ret[$ns][$directive] = null;
continue;
}
if (!isset($array[$skey])) continue;
$value = $mq ? stripslashes($array[$skey]) : $array[$skey];
$ret[$ns][$directive] = $value;
}
return $ret;
}
/**
* Loads configuration values from an ini file
* @param $filename Name of ini file
*/
public function loadIni($filename) {
if ($this->isFinalized('Cannot load directives after finalization')) return;
$array = parse_ini_file($filename, true);
$this->loadArray($array);
}
/**
* Checks whether or not the configuration object is finalized.
* @param $error String error message, or false for no error
*/
public function isFinalized($error = false) {
if ($this->finalized && $error) {
$this->triggerError($error, E_USER_ERROR);
}
return $this->finalized;
}
/**
* Finalizes configuration only if auto finalize is on and not
* already finalized
*/
public function autoFinalize() {
if ($this->autoFinalize) {
$this->finalize();
} else {
$this->plist->squash(true);
}
}
/**
* Finalizes a configuration object, prohibiting further change
*/
public function finalize() {
$this->finalized = true;
unset($this->parser);
}
/**
* Produces a nicely formatted error message by supplying the
* stack frame information OUTSIDE of HTMLPurifier_Config.
*/
protected function triggerError($msg, $no) {
// determine previous stack frame
$extra = '';
if ($this->chatty) {
$trace = debug_backtrace();
// zip(tail(trace), trace) -- but PHP is not Haskell har har
for ($i = 0, $c = count($trace); $i < $c - 1; $i++) {
if ($trace[$i + 1]['class'] === 'HTMLPurifier_Config') {
continue;
}
$frame = $trace[$i];
$extra = " invoked on line {$frame['line']} in file {$frame['file']}";
break;
}
}
trigger_error($msg . $extra, $no);
}
/**
* Returns a serialized form of the configuration object that can
* be reconstituted.
*/
public function serialize() {
$this->getDefinition('HTML');
$this->getDefinition('CSS');
$this->getDefinition('URI');
return serialize($this);
}
}
// vim: et sw=4 sts=4

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<?php
/**
* Configuration definition, defines directives and their defaults.
*/
class HTMLPurifier_ConfigSchema {
/**
* Defaults of the directives and namespaces.
* @note This shares the exact same structure as HTMLPurifier_Config::$conf
*/
public $defaults = array();
/**
* The default property list. Do not edit this property list.
*/
public $defaultPlist;
/**
* Definition of the directives. The structure of this is:
*
* array(
* 'Namespace' => array(
* 'Directive' => new stdclass(),
* )
* )
*
* The stdclass may have the following properties:
*
* - If isAlias isn't set:
* - type: Integer type of directive, see HTMLPurifier_VarParser for definitions
* - allow_null: If set, this directive allows null values
* - aliases: If set, an associative array of value aliases to real values
* - allowed: If set, a lookup array of allowed (string) values
* - If isAlias is set:
* - namespace: Namespace this directive aliases to
* - name: Directive name this directive aliases to
*
* In certain degenerate cases, stdclass will actually be an integer. In
* that case, the value is equivalent to an stdclass with the type
* property set to the integer. If the integer is negative, type is
* equal to the absolute value of integer, and allow_null is true.
*
* This class is friendly with HTMLPurifier_Config. If you need introspection
* about the schema, you're better of using the ConfigSchema_Interchange,
* which uses more memory but has much richer information.
*/
public $info = array();
/**
* Application-wide singleton
*/
static protected $singleton;
public function __construct() {
$this->defaultPlist = new HTMLPurifier_PropertyList();
}
/**
* Unserializes the default ConfigSchema.
*/
public static function makeFromSerial() {
$contents = file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser');
$r = unserialize($contents);
if (!$r) {
$hash = sha1($contents);
trigger_error("Unserialization of configuration schema failed, sha1 of file was $hash", E_USER_ERROR);
}
return $r;
}
/**
* Retrieves an instance of the application-wide configuration definition.
*/
public static function instance($prototype = null) {
if ($prototype !== null) {
HTMLPurifier_ConfigSchema::$singleton = $prototype;
} elseif (HTMLPurifier_ConfigSchema::$singleton === null || $prototype === true) {
HTMLPurifier_ConfigSchema::$singleton = HTMLPurifier_ConfigSchema::makeFromSerial();
}
return HTMLPurifier_ConfigSchema::$singleton;
}
/**
* Defines a directive for configuration
* @warning Will fail of directive's namespace is defined.
* @warning This method's signature is slightly different from the legacy
* define() static method! Beware!
* @param $namespace Namespace the directive is in
* @param $name Key of directive
* @param $default Default value of directive
* @param $type Allowed type of the directive. See
* HTMLPurifier_DirectiveDef::$type for allowed values
* @param $allow_null Whether or not to allow null values
*/
public function add($key, $default, $type, $allow_null) {
$obj = new stdclass();
$obj->type = is_int($type) ? $type : HTMLPurifier_VarParser::$types[$type];
if ($allow_null) $obj->allow_null = true;
$this->info[$key] = $obj;
$this->defaults[$key] = $default;
$this->defaultPlist->set($key, $default);
}
/**
* Defines a directive value alias.
*
* Directive value aliases are convenient for developers because it lets
* them set a directive to several values and get the same result.
* @param $namespace Directive's namespace
* @param $name Name of Directive
* @param $aliases Hash of aliased values to the real alias
*/
public function addValueAliases($key, $aliases) {
if (!isset($this->info[$key]->aliases)) {
$this->info[$key]->aliases = array();
}
foreach ($aliases as $alias => $real) {
$this->info[$key]->aliases[$alias] = $real;
}
}
/**
* Defines a set of allowed values for a directive.
* @warning This is slightly different from the corresponding static
* method definition.
* @param $namespace Namespace of directive
* @param $name Name of directive
* @param $allowed Lookup array of allowed values
*/
public function addAllowedValues($key, $allowed) {
$this->info[$key]->allowed = $allowed;
}
/**
* Defines a directive alias for backwards compatibility
* @param $namespace
* @param $name Directive that will be aliased
* @param $new_namespace
* @param $new_name Directive that the alias will be to
*/
public function addAlias($key, $new_key) {
$obj = new stdclass;
$obj->key = $new_key;
$obj->isAlias = true;
$this->info[$key] = $obj;
}
/**
* Replaces any stdclass that only has the type property with type integer.
*/
public function postProcess() {
foreach ($this->info as $key => $v) {
if (count((array) $v) == 1) {
$this->info[$key] = $v->type;
} elseif (count((array) $v) == 2 && isset($v->allow_null)) {
$this->info[$key] = -$v->type;
}
}
}
}
// vim: et sw=4 sts=4

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12
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.AllowedFonts.txt Normal file
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CSS.AllowedFonts
TYPE: lookup/null
VERSION: 4.3.0
DEFAULT: NULL
--DESCRIPTION--
<p>
Allows you to manually specify a set of allowed fonts. If
<code>NULL</code>, all fonts are allowed. This directive
affects generic names (serif, sans-serif, monospace, cursive,
fantasy) as well as specific font families.
</p>
--# vim: et sw=4 sts=4

13
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.ForbiddenProperties.txt Normal file
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CSS.ForbiddenProperties
TYPE: lookup
VERSION: 4.2.0
DEFAULT: array()
--DESCRIPTION--
<p>
This is the logical inverse of %CSS.AllowedProperties, and it will
override that directive or any other directive. If possible,
%CSS.AllowedProperties is recommended over this directive,
because it can sometimes be difficult to tell whether or not you've
forbidden all of the CSS properties you truly would like to disallow.
</p>
--# vim: et sw=4 sts=4

9
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/CSS.Trusted.txt Normal file
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CSS.Trusted
TYPE: bool
VERSION: 4.2.1
DEFAULT: false
--DESCRIPTION--
Indicates whether or not the user's CSS input is trusted or not. If the
input is trusted, a more expansive set of allowed properties. See
also %HTML.Trusted.
--# vim: et sw=4 sts=4

11
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Cache.SerializerPermissions.txt Normal file
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Cache.SerializerPermissions
TYPE: int
VERSION: 4.3.0
DEFAULT: 0755
--DESCRIPTION--
<p>
Directory permissions of the files and directories created inside
the DefinitionCache/Serializer or other custom serializer path.
</p>
--# vim: et sw=4 sts=4

11
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.NormalizeNewlines.txt Normal file
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Core.NormalizeNewlines
TYPE: bool
VERSION: 4.2.0
DEFAULT: true
--DESCRIPTION--
<p>
Whether or not to normalize newlines to the operating
system default. When <code>false</code>, HTML Purifier
will attempt to preserve mixed newline files.
</p>
--# vim: et sw=4 sts=4

11
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Core.RemoveProcessingInstructions.txt Normal file
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Core.RemoveProcessingInstructions
TYPE: bool
VERSION: 4.2.0
DEFAULT: false
--DESCRIPTION--
Instead of escaping processing instructions in the form <code>&lt;? ...
?&gt;</code>, remove it out-right. This may be useful if the HTML
you are validating contains XML processing instruction gunk, however,
it can also be user-unfriendly for people attempting to post PHP
snippets.
--# vim: et sw=4 sts=4

16
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/Filter.YouTube.txt Executable file
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Filter.YouTube
TYPE: bool
VERSION: 3.1.0
DEFAULT: false
--DESCRIPTION--
<p>
<strong>Warning:</strong> Deprecated in favor of %HTML.SafeObject and
%Output.FlashCompat (turn both on to allow YouTube videos and other
Flash content).
</p>
<p>
This directive enables YouTube video embedding in HTML Purifier. Check
<a href="http://htmlpurifier.org/docs/enduser-youtube.html">this document
on embedding videos</a> for more information on what this filter does.
</p>
--# vim: et sw=4 sts=4

25
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Allowed.txt Executable file
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HTML.Allowed
TYPE: itext/null
VERSION: 2.0.0
DEFAULT: NULL
--DESCRIPTION--
<p>
This is a preferred convenience directive that combines
%HTML.AllowedElements and %HTML.AllowedAttributes.
Specify elements and attributes that are allowed using:
<code>element1[attr1|attr2],element2...</code>. For example,
if you would like to only allow paragraphs and links, specify
<code>a[href],p</code>. You can specify attributes that apply
to all elements using an asterisk, e.g. <code>*[lang]</code>.
You can also use newlines instead of commas to separate elements.
</p>
<p>
<strong>Warning</strong>:
All of the constraints on the component directives are still enforced.
The syntax is a <em>subset</em> of TinyMCE's <code>valid_elements</code>
whitelist: directly copy-pasting it here will probably result in
broken whitelists. If %HTML.AllowedElements or %HTML.AllowedAttributes
are set, this directive has no effect.
</p>
--# vim: et sw=4 sts=4

23
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.AllowedElements.txt Executable file
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HTML.AllowedElements
TYPE: lookup/null
VERSION: 1.3.0
DEFAULT: NULL
--DESCRIPTION--
<p>
If HTML Purifier's tag set is unsatisfactory for your needs, you can
overload it with your own list of tags to allow. If you change
this, you probably also want to change %HTML.AllowedAttributes; see
also %HTML.Allowed which lets you set allowed elements and
attributes at the same time.
</p>
<p>
If you attempt to allow an element that HTML Purifier does not know
about, HTML Purifier will raise an error. You will need to manually
tell HTML Purifier about this element by using the
<a href="http://htmlpurifier.org/docs/enduser-customize.html">advanced customization features.</a>
</p>
<p>
<strong>Warning:</strong> If another directive conflicts with the
elements here, <em>that</em> directive will win and override.
</p>
--# vim: et sw=4 sts=4

11
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.FlashAllowFullScreen.txt Normal file
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HTML.FlashAllowFullScreen
TYPE: bool
VERSION: 4.2.0
DEFAULT: false
--DESCRIPTION--
<p>
Whether or not to permit embedded Flash content from
%HTML.SafeObject to expand to the full screen. Corresponds to
the <code>allowFullScreen</code> parameter.
</p>
--# vim: et sw=4 sts=4

7
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/HTML.Nofollow.txt Normal file
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HTML.Nofollow
TYPE: bool
VERSION: 4.3.0
DEFAULT: FALSE
--DESCRIPTION--
If enabled, nofollow rel attributes are added to all outgoing links.
--# vim: et sw=4 sts=4

9
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HTML.Trusted
TYPE: bool
VERSION: 2.0.0
DEFAULT: false
--DESCRIPTION--
Indicates whether or not the user input is trusted or not. If the input is
trusted, a more expansive set of allowed tags and attributes will be used.
See also %CSS.Trusted.
--# vim: et sw=4 sts=4

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Output.FixInnerHTML
TYPE: bool
VERSION: 4.3.0
DEFAULT: true
--DESCRIPTION--
<p>
If true, HTML Purifier will protect against Internet Explorer's
mishandling of the <code>innerHTML</code> attribute by appending
a space to any attribute that does not contain angled brackets, spaces
or quotes, but contains a backtick. This slightly changes the
semantics of any given attribute, so if this is unacceptable and
you do not use <code>innerHTML</code> on any of your pages, you can
turn this directive off.
</p>
--# vim: et sw=4 sts=4

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URI.AllowedSchemes
TYPE: lookup
--DEFAULT--
array (
'http' => true,
'https' => true,
'mailto' => true,
'ftp' => true,
'nntp' => true,
'news' => true,
)
--DESCRIPTION--
Whitelist that defines the schemes that a URI is allowed to have. This
prevents XSS attacks from using pseudo-schemes like javascript or mocha.
There is also support for the <code>data</code> and <code>file</code>
URI schemes, but they are not enabled by default.
--# vim: et sw=4 sts=4

15
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/ConfigSchema/schema/URI.DisableResources.txt Executable file
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URI.DisableResources
TYPE: bool
VERSION: 4.2.0
DEFAULT: false
--DESCRIPTION--
<p>
Disables embedding resources, essentially meaning no pictures. You can
still link to them though. See %URI.DisableExternalResources for why
this might be a good idea.
</p>
<p>
<em>Note:</em> While this directive has been available since 1.3.0,
it didn't actually start doing anything until 4.2.0.
</p>
--# vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Definition.php Executable file
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<?php
/**
* Super-class for definition datatype objects, implements serialization
* functions for the class.
*/
abstract class HTMLPurifier_Definition
{
/**
* Has setup() been called yet?
*/
public $setup = false;
/**
* If true, write out the final definition object to the cache after
* setup. This will be true only if all invocations to get a raw
* definition object are also optimized. This does not cause file
* system thrashing because on subsequent calls the cached object
* is used and any writes to the raw definition object are short
* circuited. See enduser-customize.html for the high-level
* picture.
*/
public $optimized = null;
/**
* What type of definition is it?
*/
public $type;
/**
* Sets up the definition object into the final form, something
* not done by the constructor
* @param $config HTMLPurifier_Config instance
*/
abstract protected function doSetup($config);
/**
* Setup function that aborts if already setup
* @param $config HTMLPurifier_Config instance
*/
public function setup($config) {
if ($this->setup) return;
$this->setup = true;
$this->doSetup($config);
}
}
// vim: et sw=4 sts=4

191
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php Executable file
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<?php
class HTMLPurifier_DefinitionCache_Serializer extends
HTMLPurifier_DefinitionCache
{
public function add($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (file_exists($file)) return false;
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function set($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function replace($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function get($config) {
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
return unserialize(file_get_contents($file));
}
public function remove($config) {
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
return unlink($file);
}
public function flush($config) {
if (!$this->_prepareDir($config)) return false;
$dir = $this->generateDirectoryPath($config);
$dh = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (empty($filename)) continue;
if ($filename[0] === '.') continue;
unlink($dir . '/' . $filename);
}
}
public function cleanup($config) {
if (!$this->_prepareDir($config)) return false;
$dir = $this->generateDirectoryPath($config);
$dh = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (empty($filename)) continue;
if ($filename[0] === '.') continue;
$key = substr($filename, 0, strlen($filename) - 4);
if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
}
}
/**
* Generates the file path to the serial file corresponding to
* the configuration and definition name
* @todo Make protected
*/
public function generateFilePath($config) {
$key = $this->generateKey($config);
return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
}
/**
* Generates the path to the directory contain this cache's serial files
* @note No trailing slash
* @todo Make protected
*/
public function generateDirectoryPath($config) {
$base = $this->generateBaseDirectoryPath($config);
return $base . '/' . $this->type;
}
/**
* Generates path to base directory that contains all definition type
* serials
* @todo Make protected
*/
public function generateBaseDirectoryPath($config) {
$base = $config->get('Cache.SerializerPath');
$base = is_null($base) ? HTMLPURIFIER_PREFIX . '/HTMLPurifier/DefinitionCache/Serializer' : $base;
return $base;
}
/**
* Convenience wrapper function for file_put_contents
* @param $file File name to write to
* @param $data Data to write into file
* @param $config Config object
* @return Number of bytes written if success, or false if failure.
*/
private function _write($file, $data, $config) {
$result = file_put_contents($file, $data);
if ($result !== false) {
// set permissions of the new file (no execute)
$chmod = $config->get('Cache.SerializerPermissions');
if (!$chmod) {
$chmod = 0644; // invalid config or simpletest
}
$chmod = $chmod & 0666;
chmod($file, $chmod);
}
return $result;
}
/**
* Prepares the directory that this type stores the serials in
* @param $config Config object
* @return True if successful
*/
private function _prepareDir($config) {
$directory = $this->generateDirectoryPath($config);
$chmod = $config->get('Cache.SerializerPermissions');
if (!$chmod) {
$chmod = 0755; // invalid config or simpletest
}
if (!is_dir($directory)) {
$base = $this->generateBaseDirectoryPath($config);
if (!is_dir($base)) {
trigger_error('Base directory '.$base.' does not exist,
please create or change using %Cache.SerializerPath',
E_USER_WARNING);
return false;
} elseif (!$this->_testPermissions($base, $chmod)) {
return false;
}
$old = umask(0000);
mkdir($directory, $chmod);
umask($old);
} elseif (!$this->_testPermissions($directory, $chmod)) {
return false;
}
return true;
}
/**
* Tests permissions on a directory and throws out friendly
* error messages and attempts to chmod it itself if possible
* @param $dir Directory path
* @param $chmod Permissions
* @return True if directory writable
*/
private function _testPermissions($dir, $chmod) {
// early abort, if it is writable, everything is hunky-dory
if (is_writable($dir)) return true;
if (!is_dir($dir)) {
// generally, you'll want to handle this beforehand
// so a more specific error message can be given
trigger_error('Directory '.$dir.' does not exist',
E_USER_WARNING);
return false;
}
if (function_exists('posix_getuid')) {
// POSIX system, we can give more specific advice
if (fileowner($dir) === posix_getuid()) {
// we can chmod it ourselves
$chmod = $chmod | 0700;
if (chmod($dir, $chmod)) return true;
} elseif (filegroup($dir) === posix_getgid()) {
$chmod = $chmod | 0070;
} else {
// PHP's probably running as nobody, so we'll
// need to give global permissions
$chmod = $chmod | 0777;
}
trigger_error('Directory '.$dir.' not writable, '.
'please chmod to ' . decoct($chmod),
E_USER_WARNING);
} else {
// generic error message
trigger_error('Directory '.$dir.' not writable, '.
'please alter file permissions',
E_USER_WARNING);
}
return false;
}
}
// vim: et sw=4 sts=4

1
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/EntityLookup/entities.ser Executable file
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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Generator.php Executable file
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<?php
/**
* Generates HTML from tokens.
* @todo Refactor interface so that configuration/context is determined
* upon instantiation, no need for messy generateFromTokens() calls
* @todo Make some of the more internal functions protected, and have
* unit tests work around that
*/
class HTMLPurifier_Generator
{
/**
* Whether or not generator should produce XML output
*/
private $_xhtml = true;
/**
* :HACK: Whether or not generator should comment the insides of <script> tags
*/
private $_scriptFix = false;
/**
* Cache of HTMLDefinition during HTML output to determine whether or
* not attributes should be minimized.
*/
private $_def;
/**
* Cache of %Output.SortAttr
*/
private $_sortAttr;
/**
* Cache of %Output.FlashCompat
*/
private $_flashCompat;
/**
* Cache of %Output.FixInnerHTML
*/
private $_innerHTMLFix;
/**
* Stack for keeping track of object information when outputting IE
* compatibility code.
*/
private $_flashStack = array();
/**
* Configuration for the generator
*/
protected $config;
/**
* @param $config Instance of HTMLPurifier_Config
* @param $context Instance of HTMLPurifier_Context
*/
public function __construct($config, $context) {
$this->config = $config;
$this->_scriptFix = $config->get('Output.CommentScriptContents');
$this->_innerHTMLFix = $config->get('Output.FixInnerHTML');
$this->_sortAttr = $config->get('Output.SortAttr');
$this->_flashCompat = $config->get('Output.FlashCompat');
$this->_def = $config->getHTMLDefinition();
$this->_xhtml = $this->_def->doctype->xml;
}
/**
* Generates HTML from an array of tokens.
* @param $tokens Array of HTMLPurifier_Token
* @param $config HTMLPurifier_Config object
* @return Generated HTML
*/
public function generateFromTokens($tokens) {
if (!$tokens) return '';
// Basic algorithm
$html = '';
for ($i = 0, $size = count($tokens); $i < $size; $i++) {
if ($this->_scriptFix && $tokens[$i]->name === 'script'
&& $i + 2 < $size && $tokens[$i+2] instanceof HTMLPurifier_Token_End) {
// script special case
// the contents of the script block must be ONE token
// for this to work.
$html .= $this->generateFromToken($tokens[$i++]);
$html .= $this->generateScriptFromToken($tokens[$i++]);
}
$html .= $this->generateFromToken($tokens[$i]);
}
// Tidy cleanup
if (extension_loaded('tidy') && $this->config->get('Output.TidyFormat')) {
$tidy = new Tidy;
$tidy->parseString($html, array(
'indent'=> true,
'output-xhtml' => $this->_xhtml,
'show-body-only' => true,
'indent-spaces' => 2,
'wrap' => 68,
), 'utf8');
$tidy->cleanRepair();
$html = (string) $tidy; // explicit cast necessary
}
// Normalize newlines to system defined value
if ($this->config->get('Core.NormalizeNewlines')) {
$nl = $this->config->get('Output.Newline');
if ($nl === null) $nl = PHP_EOL;
if ($nl !== "\n") $html = str_replace("\n", $nl, $html);
}
return $html;
}
/**
* Generates HTML from a single token.
* @param $token HTMLPurifier_Token object.
* @return Generated HTML
*/
public function generateFromToken($token) {
if (!$token instanceof HTMLPurifier_Token) {
trigger_error('Cannot generate HTML from non-HTMLPurifier_Token object', E_USER_WARNING);
return '';
} elseif ($token instanceof HTMLPurifier_Token_Start) {
$attr = $this->generateAttributes($token->attr, $token->name);
if ($this->_flashCompat) {
if ($token->name == "object") {
$flash = new stdclass();
$flash->attr = $token->attr;
$flash->param = array();
$this->_flashStack[] = $flash;
}
}
return '<' . $token->name . ($attr ? ' ' : '') . $attr . '>';
} elseif ($token instanceof HTMLPurifier_Token_End) {
$_extra = '';
if ($this->_flashCompat) {
if ($token->name == "object" && !empty($this->_flashStack)) {
// doesn't do anything for now
}
}
return $_extra . '</' . $token->name . '>';
} elseif ($token instanceof HTMLPurifier_Token_Empty) {
if ($this->_flashCompat && $token->name == "param" && !empty($this->_flashStack)) {
$this->_flashStack[count($this->_flashStack)-1]->param[$token->attr['name']] = $token->attr['value'];
}
$attr = $this->generateAttributes($token->attr, $token->name);
return '<' . $token->name . ($attr ? ' ' : '') . $attr .
( $this->_xhtml ? ' /': '' ) // <br /> v. <br>
. '>';
} elseif ($token instanceof HTMLPurifier_Token_Text) {
return $this->escape($token->data, ENT_NOQUOTES);
} elseif ($token instanceof HTMLPurifier_Token_Comment) {
return '<!--' . $token->data . '-->';
} else {
return '';
}
}
/**
* Special case processor for the contents of script tags
* @warning This runs into problems if there's already a literal
* --> somewhere inside the script contents.
*/
public function generateScriptFromToken($token) {
if (!$token instanceof HTMLPurifier_Token_Text) return $this->generateFromToken($token);
// Thanks <http://lachy.id.au/log/2005/05/script-comments>
$data = preg_replace('#//\s*$#', '', $token->data);
return '<!--//--><![CDATA[//><!--' . "\n" . trim($data) . "\n" . '//--><!]]>';
}
/**
* Generates attribute declarations from attribute array.
* @note This does not include the leading or trailing space.
* @param $assoc_array_of_attributes Attribute array
* @param $element Name of element attributes are for, used to check
* attribute minimization.
* @return Generate HTML fragment for insertion.
*/
public function generateAttributes($assoc_array_of_attributes, $element = false) {
$html = '';
if ($this->_sortAttr) ksort($assoc_array_of_attributes);
foreach ($assoc_array_of_attributes as $key => $value) {
if (!$this->_xhtml) {
// Remove namespaced attributes
if (strpos($key, ':') !== false) continue;
// Check if we should minimize the attribute: val="val" -> val
if ($element && !empty($this->_def->info[$element]->attr[$key]->minimized)) {
$html .= $key . ' ';
continue;
}
}
// Workaround for Internet Explorer innerHTML bug.
// Essentially, Internet Explorer, when calculating
// innerHTML, omits quotes if there are no instances of
// angled brackets, quotes or spaces. However, when parsing
// HTML (for example, when you assign to innerHTML), it
// treats backticks as quotes. Thus,
// <img alt="``" />
// becomes
// <img alt=`` />
// becomes
// <img alt='' />
// Fortunately, all we need to do is trigger an appropriate
// quoting style, which we do by adding an extra space.
// This also is consistent with the W3C spec, which states
// that user agents may ignore leading or trailing
// whitespace (in fact, most don't, at least for attributes
// like alt, but an extra space at the end is barely
// noticeable). Still, we have a configuration knob for
// this, since this transformation is not necesary if you
// don't process user input with innerHTML or you don't plan
// on supporting Internet Explorer.
if ($this->_innerHTMLFix) {
if (strpos($value, '`') !== false) {
// check if correct quoting style would not already be
// triggered
if (strcspn($value, '"\' <>') === strlen($value)) {
// protect!
$value .= ' ';
}
}
}
$html .= $key.'="'.$this->escape($value).'" ';
}
return rtrim($html);
}
/**
* Escapes raw text data.
* @todo This really ought to be protected, but until we have a facility
* for properly generating HTML here w/o using tokens, it stays
* public.
* @param $string String data to escape for HTML.
* @param $quote Quoting style, like htmlspecialchars. ENT_NOQUOTES is
* permissible for non-attribute output.
* @return String escaped data.
*/
public function escape($string, $quote = null) {
// Workaround for APC bug on Mac Leopard reported by sidepodcast
// http://htmlpurifier.org/phorum/read.php?3,4823,4846
if ($quote === null) $quote = ENT_COMPAT;
return htmlspecialchars($string, $quote, 'UTF-8');
}
}
// vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/HTMLDefinition.php Executable file
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<?php
/**
* Definition of the purified HTML that describes allowed children,
* attributes, and many other things.
*
* Conventions:
*
* All member variables that are prefixed with info
* (including the main $info array) are used by HTML Purifier internals
* and should not be directly edited when customizing the HTMLDefinition.
* They can usually be set via configuration directives or custom
* modules.
*
* On the other hand, member variables without the info prefix are used
* internally by the HTMLDefinition and MUST NOT be used by other HTML
* Purifier internals. Many of them, however, are public, and may be
* edited by userspace code to tweak the behavior of HTMLDefinition.
*
* @note This class is inspected by Printer_HTMLDefinition; please
* update that class if things here change.
*
* @warning Directives that change this object's structure must be in
* the HTML or Attr namespace!
*/
class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
{
// FULLY-PUBLIC VARIABLES ---------------------------------------------
/**
* Associative array of element names to HTMLPurifier_ElementDef
*/
public $info = array();
/**
* Associative array of global attribute name to attribute definition.
*/
public $info_global_attr = array();
/**
* String name of parent element HTML will be going into.
*/
public $info_parent = 'div';
/**
* Definition for parent element, allows parent element to be a
* tag that's not allowed inside the HTML fragment.
*/
public $info_parent_def;
/**
* String name of element used to wrap inline elements in block context
* @note This is rarely used except for BLOCKQUOTEs in strict mode
*/
public $info_block_wrapper = 'p';
/**
* Associative array of deprecated tag name to HTMLPurifier_TagTransform
*/
public $info_tag_transform = array();
/**
* Indexed list of HTMLPurifier_AttrTransform to be performed before validation.
*/
public $info_attr_transform_pre = array();
/**
* Indexed list of HTMLPurifier_AttrTransform to be performed after validation.
*/
public $info_attr_transform_post = array();
/**
* Nested lookup array of content set name (Block, Inline) to
* element name to whether or not it belongs in that content set.
*/
public $info_content_sets = array();
/**
* Indexed list of HTMLPurifier_Injector to be used.
*/
public $info_injector = array();
/**
* Doctype object
*/
public $doctype;
// RAW CUSTOMIZATION STUFF --------------------------------------------
/**
* Adds a custom attribute to a pre-existing element
* @note This is strictly convenience, and does not have a corresponding
* method in HTMLPurifier_HTMLModule
* @param $element_name String element name to add attribute to
* @param $attr_name String name of attribute
* @param $def Attribute definition, can be string or object, see
* HTMLPurifier_AttrTypes for details
*/
public function addAttribute($element_name, $attr_name, $def) {
$module = $this->getAnonymousModule();
if (!isset($module->info[$element_name])) {
$element = $module->addBlankElement($element_name);
} else {
$element = $module->info[$element_name];
}
$element->attr[$attr_name] = $def;
}
/**
* Adds a custom element to your HTML definition
* @note See HTMLPurifier_HTMLModule::addElement for detailed
* parameter and return value descriptions.
*/
public function addElement($element_name, $type, $contents, $attr_collections, $attributes = array()) {
$module = $this->getAnonymousModule();
// assume that if the user is calling this, the element
// is safe. This may not be a good idea
$element = $module->addElement($element_name, $type, $contents, $attr_collections, $attributes);
return $element;
}
/**
* Adds a blank element to your HTML definition, for overriding
* existing behavior
* @note See HTMLPurifier_HTMLModule::addBlankElement for detailed
* parameter and return value descriptions.
*/
public function addBlankElement($element_name) {
$module = $this->getAnonymousModule();
$element = $module->addBlankElement($element_name);
return $element;
}
/**
* Retrieves a reference to the anonymous module, so you can
* bust out advanced features without having to make your own
* module.
*/
public function getAnonymousModule() {
if (!$this->_anonModule) {
$this->_anonModule = new HTMLPurifier_HTMLModule();
$this->_anonModule->name = 'Anonymous';
}
return $this->_anonModule;
}
private $_anonModule;
// PUBLIC BUT INTERNAL VARIABLES --------------------------------------
public $type = 'HTML';
public $manager; /**< Instance of HTMLPurifier_HTMLModuleManager */
/**
* Performs low-cost, preliminary initialization.
*/
public function __construct() {
$this->manager = new HTMLPurifier_HTMLModuleManager();
}
protected function doSetup($config) {
$this->processModules($config);
$this->setupConfigStuff($config);
unset($this->manager);
// cleanup some of the element definitions
foreach ($this->info as $k => $v) {
unset($this->info[$k]->content_model);
unset($this->info[$k]->content_model_type);
}
}
/**
* Extract out the information from the manager
*/
protected function processModules($config) {
if ($this->_anonModule) {
// for user specific changes
// this is late-loaded so we don't have to deal with PHP4
// reference wonky-ness
$this->manager->addModule($this->_anonModule);
unset($this->_anonModule);
}
$this->manager->setup($config);
$this->doctype = $this->manager->doctype;
foreach ($this->manager->modules as $module) {
foreach($module->info_tag_transform as $k => $v) {
if ($v === false) unset($this->info_tag_transform[$k]);
else $this->info_tag_transform[$k] = $v;
}
foreach($module->info_attr_transform_pre as $k => $v) {
if ($v === false) unset($this->info_attr_transform_pre[$k]);
else $this->info_attr_transform_pre[$k] = $v;
}
foreach($module->info_attr_transform_post as $k => $v) {
if ($v === false) unset($this->info_attr_transform_post[$k]);
else $this->info_attr_transform_post[$k] = $v;
}
foreach ($module->info_injector as $k => $v) {
if ($v === false) unset($this->info_injector[$k]);
else $this->info_injector[$k] = $v;
}
}
$this->info = $this->manager->getElements();
$this->info_content_sets = $this->manager->contentSets->lookup;
}
/**
* Sets up stuff based on config. We need a better way of doing this.
*/
protected function setupConfigStuff($config) {
$block_wrapper = $config->get('HTML.BlockWrapper');
if (isset($this->info_content_sets['Block'][$block_wrapper])) {
$this->info_block_wrapper = $block_wrapper;
} else {
trigger_error('Cannot use non-block element as block wrapper',
E_USER_ERROR);
}
$parent = $config->get('HTML.Parent');
$def = $this->manager->getElement($parent, true);
if ($def) {
$this->info_parent = $parent;
$this->info_parent_def = $def;
} else {
trigger_error('Cannot use unrecognized element as parent',
E_USER_ERROR);
$this->info_parent_def = $this->manager->getElement($this->info_parent, true);
}
// support template text
$support = "(for information on implementing this, see the ".
"support forums) ";
// setup allowed elements -----------------------------------------
$allowed_elements = $config->get('HTML.AllowedElements');
$allowed_attributes = $config->get('HTML.AllowedAttributes'); // retrieve early
if (!is_array($allowed_elements) && !is_array($allowed_attributes)) {
$allowed = $config->get('HTML.Allowed');
if (is_string($allowed)) {
list($allowed_elements, $allowed_attributes) = $this->parseTinyMCEAllowedList($allowed);
}
}
if (is_array($allowed_elements)) {
foreach ($this->info as $name => $d) {
if(!isset($allowed_elements[$name])) unset($this->info[$name]);
unset($allowed_elements[$name]);
}
// emit errors
foreach ($allowed_elements as $element => $d) {
$element = htmlspecialchars($element); // PHP doesn't escape errors, be careful!
trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
}
}
// setup allowed attributes ---------------------------------------
$allowed_attributes_mutable = $allowed_attributes; // by copy!
if (is_array($allowed_attributes)) {
// This actually doesn't do anything, since we went away from
// global attributes. It's possible that userland code uses
// it, but HTMLModuleManager doesn't!
foreach ($this->info_global_attr as $attr => $x) {
$keys = array($attr, "*@$attr", "*.$attr");
$delete = true;
foreach ($keys as $key) {
if ($delete && isset($allowed_attributes[$key])) {
$delete = false;
}
if (isset($allowed_attributes_mutable[$key])) {
unset($allowed_attributes_mutable[$key]);
}
}
if ($delete) unset($this->info_global_attr[$attr]);
}
foreach ($this->info as $tag => $info) {
foreach ($info->attr as $attr => $x) {
$keys = array("$tag@$attr", $attr, "*@$attr", "$tag.$attr", "*.$attr");
$delete = true;
foreach ($keys as $key) {
if ($delete && isset($allowed_attributes[$key])) {
$delete = false;
}
if (isset($allowed_attributes_mutable[$key])) {
unset($allowed_attributes_mutable[$key]);
}
}
if ($delete) {
if ($this->info[$tag]->attr[$attr]->required) {
trigger_error("Required attribute '$attr' in element '$tag' was not allowed, which means '$tag' will not be allowed either", E_USER_WARNING);
}
unset($this->info[$tag]->attr[$attr]);
}
}
}
// emit errors
foreach ($allowed_attributes_mutable as $elattr => $d) {
$bits = preg_split('/[.@]/', $elattr, 2);
$c = count($bits);
switch ($c) {
case 2:
if ($bits[0] !== '*') {
$element = htmlspecialchars($bits[0]);
$attribute = htmlspecialchars($bits[1]);
if (!isset($this->info[$element])) {
trigger_error("Cannot allow attribute '$attribute' if element '$element' is not allowed/supported $support");
} else {
trigger_error("Attribute '$attribute' in element '$element' not supported $support",
E_USER_WARNING);
}
break;
}
// otherwise fall through
case 1:
$attribute = htmlspecialchars($bits[0]);
trigger_error("Global attribute '$attribute' is not ".
"supported in any elements $support",
E_USER_WARNING);
break;
}
}
}
// setup forbidden elements ---------------------------------------
$forbidden_elements = $config->get('HTML.ForbiddenElements');
$forbidden_attributes = $config->get('HTML.ForbiddenAttributes');
foreach ($this->info as $tag => $info) {
if (isset($forbidden_elements[$tag])) {
unset($this->info[$tag]);
continue;
}
foreach ($info->attr as $attr => $x) {
if (
isset($forbidden_attributes["$tag@$attr"]) ||
isset($forbidden_attributes["*@$attr"]) ||
isset($forbidden_attributes[$attr])
) {
unset($this->info[$tag]->attr[$attr]);
continue;
} // this segment might get removed eventually
elseif (isset($forbidden_attributes["$tag.$attr"])) {
// $tag.$attr are not user supplied, so no worries!
trigger_error("Error with $tag.$attr: tag.attr syntax not supported for HTML.ForbiddenAttributes; use tag@attr instead", E_USER_WARNING);
}
}
}
foreach ($forbidden_attributes as $key => $v) {
if (strlen($key) < 2) continue;
if ($key[0] != '*') continue;
if ($key[1] == '.') {
trigger_error("Error with $key: *.attr syntax not supported for HTML.ForbiddenAttributes; use attr instead", E_USER_WARNING);
}
}
// setup injectors -----------------------------------------------------
foreach ($this->info_injector as $i => $injector) {
if ($injector->checkNeeded($config) !== false) {
// remove injector that does not have it's required
// elements/attributes present, and is thus not needed.
unset($this->info_injector[$i]);
}
}
}
/**
* Parses a TinyMCE-flavored Allowed Elements and Attributes list into
* separate lists for processing. Format is element[attr1|attr2],element2...
* @warning Although it's largely drawn from TinyMCE's implementation,
* it is different, and you'll probably have to modify your lists
* @param $list String list to parse
* @param array($allowed_elements, $allowed_attributes)
* @todo Give this its own class, probably static interface
*/
public function parseTinyMCEAllowedList($list) {
$list = str_replace(array(' ', "\t"), '', $list);
$elements = array();
$attributes = array();
$chunks = preg_split('/(,|[\n\r]+)/', $list);
foreach ($chunks as $chunk) {
if (empty($chunk)) continue;
// remove TinyMCE element control characters
if (!strpos($chunk, '[')) {
$element = $chunk;
$attr = false;
} else {
list($element, $attr) = explode('[', $chunk);
}
if ($element !== '*') $elements[$element] = true;
if (!$attr) continue;
$attr = substr($attr, 0, strlen($attr) - 1); // remove trailing ]
$attr = explode('|', $attr);
foreach ($attr as $key) {
$attributes["$element.$key"] = true;
}
}
return array($elements, $attributes);
}
}
// vim: et sw=4 sts=4

19
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/HTMLModule/Nofollow.php Normal file
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<?php
/**
* Module adds the nofollow attribute transformation to a tags. It
* is enabled by HTML.Nofollow
*/
class HTMLPurifier_HTMLModule_Nofollow extends HTMLPurifier_HTMLModule
{
public $name = 'Nofollow';
public function setup($config) {
$a = $this->addBlankElement('a');
$a->attr_transform_post[] = new HTMLPurifier_AttrTransform_Nofollow();
}
}
// vim: et sw=4 sts=4

34
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeEmbed.php Executable file
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<?php
/**
* A "safe" embed module. See SafeObject. This is a proprietary element.
*/
class HTMLPurifier_HTMLModule_SafeEmbed extends HTMLPurifier_HTMLModule
{
public $name = 'SafeEmbed';
public function setup($config) {
$max = $config->get('HTML.MaxImgLength');
$embed = $this->addElement(
'embed', 'Inline', 'Empty', 'Common',
array(
'src*' => 'URI#embedded',
'type' => 'Enum#application/x-shockwave-flash',
'width' => 'Pixels#' . $max,
'height' => 'Pixels#' . $max,
'allowscriptaccess' => 'Enum#never',
'allownetworking' => 'Enum#internal',
'flashvars' => 'Text',
'wmode' => 'Enum#window,transparent,opaque',
'name' => 'ID',
)
);
$embed->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeEmbed();
}
}
// vim: et sw=4 sts=4

52
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/HTMLModule/SafeObject.php Executable file
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<?php
/**
* A "safe" object module. In theory, objects permitted by this module will
* be safe, and untrusted users can be allowed to embed arbitrary flash objects
* (maybe other types too, but only Flash is supported as of right now).
* Highly experimental.
*/
class HTMLPurifier_HTMLModule_SafeObject extends HTMLPurifier_HTMLModule
{
public $name = 'SafeObject';
public function setup($config) {
// These definitions are not intrinsically safe: the attribute transforms
// are a vital part of ensuring safety.
$max = $config->get('HTML.MaxImgLength');
$object = $this->addElement(
'object',
'Inline',
'Optional: param | Flow | #PCDATA',
'Common',
array(
// While technically not required by the spec, we're forcing
// it to this value.
'type' => 'Enum#application/x-shockwave-flash',
'width' => 'Pixels#' . $max,
'height' => 'Pixels#' . $max,
'data' => 'URI#embedded',
'codebase' => new HTMLPurifier_AttrDef_Enum(array(
'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0')),
)
);
$object->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeObject();
$param = $this->addElement('param', false, 'Empty', false,
array(
'id' => 'ID',
'name*' => 'Text',
'value' => 'Text'
)
);
$param->attr_transform_post[] = new HTMLPurifier_AttrTransform_SafeParam();
$this->info_injector[] = 'SafeObject';
}
}
// vim: et sw=4 sts=4

403
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/HTMLModuleManager.php Executable file
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<?php
class HTMLPurifier_HTMLModuleManager
{
/**
* Instance of HTMLPurifier_DoctypeRegistry
*/
public $doctypes;
/**
* Instance of current doctype
*/
public $doctype;
/**
* Instance of HTMLPurifier_AttrTypes
*/
public $attrTypes;
/**
* Active instances of modules for the specified doctype are
* indexed, by name, in this array.
*/
public $modules = array();
/**
* Array of recognized HTMLPurifier_Module instances, indexed by
* module's class name. This array is usually lazy loaded, but a
* user can overload a module by pre-emptively registering it.
*/
public $registeredModules = array();
/**
* List of extra modules that were added by the user using addModule().
* These get unconditionally merged into the current doctype, whatever
* it may be.
*/
public $userModules = array();
/**
* Associative array of element name to list of modules that have
* definitions for the element; this array is dynamically filled.
*/
public $elementLookup = array();
/** List of prefixes we should use for registering small names */
public $prefixes = array('HTMLPurifier_HTMLModule_');
public $contentSets; /**< Instance of HTMLPurifier_ContentSets */
public $attrCollections; /**< Instance of HTMLPurifier_AttrCollections */
/** If set to true, unsafe elements and attributes will be allowed */
public $trusted = false;
public function __construct() {
// editable internal objects
$this->attrTypes = new HTMLPurifier_AttrTypes();
$this->doctypes = new HTMLPurifier_DoctypeRegistry();
// setup basic modules
$common = array(
'CommonAttributes', 'Text', 'Hypertext', 'List',
'Presentation', 'Edit', 'Bdo', 'Tables', 'Image',
'StyleAttribute',
// Unsafe:
'Scripting', 'Object', 'Forms',
// Sorta legacy, but present in strict:
'Name',
);
$transitional = array('Legacy', 'Target');
$xml = array('XMLCommonAttributes');
$non_xml = array('NonXMLCommonAttributes');
// setup basic doctypes
$this->doctypes->register(
'HTML 4.01 Transitional', false,
array_merge($common, $transitional, $non_xml),
array('Tidy_Transitional', 'Tidy_Proprietary'),
array(),
'-//W3C//DTD HTML 4.01 Transitional//EN',
'http://www.w3.org/TR/html4/loose.dtd'
);
$this->doctypes->register(
'HTML 4.01 Strict', false,
array_merge($common, $non_xml),
array('Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
array(),
'-//W3C//DTD HTML 4.01//EN',
'http://www.w3.org/TR/html4/strict.dtd'
);
$this->doctypes->register(
'XHTML 1.0 Transitional', true,
array_merge($common, $transitional, $xml, $non_xml),
array('Tidy_Transitional', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Name'),
array(),
'-//W3C//DTD XHTML 1.0 Transitional//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
);
$this->doctypes->register(
'XHTML 1.0 Strict', true,
array_merge($common, $xml, $non_xml),
array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Strict', 'Tidy_Proprietary', 'Tidy_Name'),
array(),
'-//W3C//DTD XHTML 1.0 Strict//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'
);
$this->doctypes->register(
'XHTML 1.1', true,
array_merge($common, $xml, array('Ruby')),
array('Tidy_Strict', 'Tidy_XHTML', 'Tidy_Proprietary', 'Tidy_Strict', 'Tidy_Name'), // Tidy_XHTML1_1
array(),
'-//W3C//DTD XHTML 1.1//EN',
'http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd'
);
}
/**
* Registers a module to the recognized module list, useful for
* overloading pre-existing modules.
* @param $module Mixed: string module name, with or without
* HTMLPurifier_HTMLModule prefix, or instance of
* subclass of HTMLPurifier_HTMLModule.
* @param $overload Boolean whether or not to overload previous modules.
* If this is not set, and you do overload a module,
* HTML Purifier will complain with a warning.
* @note This function will not call autoload, you must instantiate
* (and thus invoke) autoload outside the method.
* @note If a string is passed as a module name, different variants
* will be tested in this order:
* - Check for HTMLPurifier_HTMLModule_$name
* - Check all prefixes with $name in order they were added
* - Check for literal object name
* - Throw fatal error
* If your object name collides with an internal class, specify
* your module manually. All modules must have been included
* externally: registerModule will not perform inclusions for you!
*/
public function registerModule($module, $overload = false) {
if (is_string($module)) {
// attempt to load the module
$original_module = $module;
$ok = false;
foreach ($this->prefixes as $prefix) {
$module = $prefix . $original_module;
if (class_exists($module)) {
$ok = true;
break;
}
}
if (!$ok) {
$module = $original_module;
if (!class_exists($module)) {
trigger_error($original_module . ' module does not exist',
E_USER_ERROR);
return;
}
}
$module = new $module();
}
if (empty($module->name)) {
trigger_error('Module instance of ' . get_class($module) . ' must have name');
return;
}
if (!$overload && isset($this->registeredModules[$module->name])) {
trigger_error('Overloading ' . $module->name . ' without explicit overload parameter', E_USER_WARNING);
}
$this->registeredModules[$module->name] = $module;
}
/**
* Adds a module to the current doctype by first registering it,
* and then tacking it on to the active doctype
*/
public function addModule($module) {
$this->registerModule($module);
if (is_object($module)) $module = $module->name;
$this->userModules[] = $module;
}
/**
* Adds a class prefix that registerModule() will use to resolve a
* string name to a concrete class
*/
public function addPrefix($prefix) {
$this->prefixes[] = $prefix;
}
/**
* Performs processing on modules, after being called you may
* use getElement() and getElements()
* @param $config Instance of HTMLPurifier_Config
*/
public function setup($config) {
$this->trusted = $config->get('HTML.Trusted');
// generate
$this->doctype = $this->doctypes->make($config);
$modules = $this->doctype->modules;
// take out the default modules that aren't allowed
$lookup = $config->get('HTML.AllowedModules');
$special_cases = $config->get('HTML.CoreModules');
if (is_array($lookup)) {
foreach ($modules as $k => $m) {
if (isset($special_cases[$m])) continue;
if (!isset($lookup[$m])) unset($modules[$k]);
}
}
// custom modules
if ($config->get('HTML.Proprietary')) {
$modules[] = 'Proprietary';
}
if ($config->get('HTML.SafeObject')) {
$modules[] = 'SafeObject';
}
if ($config->get('HTML.SafeEmbed')) {
$modules[] = 'SafeEmbed';
}
if ($config->get('HTML.Nofollow')) {
$modules[] = 'Nofollow';
}
// merge in custom modules
$modules = array_merge($modules, $this->userModules);
foreach ($modules as $module) {
$this->processModule($module);
$this->modules[$module]->setup($config);
}
foreach ($this->doctype->tidyModules as $module) {
$this->processModule($module);
$this->modules[$module]->setup($config);
}
// prepare any injectors
foreach ($this->modules as $module) {
$n = array();
foreach ($module->info_injector as $i => $injector) {
if (!is_object($injector)) {
$class = "HTMLPurifier_Injector_$injector";
$injector = new $class;
}
$n[$injector->name] = $injector;
}
$module->info_injector = $n;
}
// setup lookup table based on all valid modules
foreach ($this->modules as $module) {
foreach ($module->info as $name => $def) {
if (!isset($this->elementLookup[$name])) {
$this->elementLookup[$name] = array();
}
$this->elementLookup[$name][] = $module->name;
}
}
// note the different choice
$this->contentSets = new HTMLPurifier_ContentSets(
// content set assembly deals with all possible modules,
// not just ones deemed to be "safe"
$this->modules
);
$this->attrCollections = new HTMLPurifier_AttrCollections(
$this->attrTypes,
// there is no way to directly disable a global attribute,
// but using AllowedAttributes or simply not including
// the module in your custom doctype should be sufficient
$this->modules
);
}
/**
* Takes a module and adds it to the active module collection,
* registering it if necessary.
*/
public function processModule($module) {
if (!isset($this->registeredModules[$module]) || is_object($module)) {
$this->registerModule($module);
}
$this->modules[$module] = $this->registeredModules[$module];
}
/**
* Retrieves merged element definitions.
* @return Array of HTMLPurifier_ElementDef
*/
public function getElements() {
$elements = array();
foreach ($this->modules as $module) {
if (!$this->trusted && !$module->safe) continue;
foreach ($module->info as $name => $v) {
if (isset($elements[$name])) continue;
$elements[$name] = $this->getElement($name);
}
}
// remove dud elements, this happens when an element that
// appeared to be safe actually wasn't
foreach ($elements as $n => $v) {
if ($v === false) unset($elements[$n]);
}
return $elements;
}
/**
* Retrieves a single merged element definition
* @param $name Name of element
* @param $trusted Boolean trusted overriding parameter: set to true
* if you want the full version of an element
* @return Merged HTMLPurifier_ElementDef
* @note You may notice that modules are getting iterated over twice (once
* in getElements() and once here). This
* is because
*/
public function getElement($name, $trusted = null) {
if (!isset($this->elementLookup[$name])) {
return false;
}
// setup global state variables
$def = false;
if ($trusted === null) $trusted = $this->trusted;
// iterate through each module that has registered itself to this
// element
foreach($this->elementLookup[$name] as $module_name) {
$module = $this->modules[$module_name];
// refuse to create/merge from a module that is deemed unsafe--
// pretend the module doesn't exist--when trusted mode is not on.
if (!$trusted && !$module->safe) {
continue;
}
// clone is used because, ideally speaking, the original
// definition should not be modified. Usually, this will
// make no difference, but for consistency's sake
$new_def = clone $module->info[$name];
if (!$def && $new_def->standalone) {
$def = $new_def;
} elseif ($def) {
// This will occur even if $new_def is standalone. In practice,
// this will usually result in a full replacement.
$def->mergeIn($new_def);
} else {
// :TODO:
// non-standalone definitions that don't have a standalone
// to merge into could be deferred to the end
continue;
}
// attribute value expansions
$this->attrCollections->performInclusions($def->attr);
$this->attrCollections->expandIdentifiers($def->attr, $this->attrTypes);
// descendants_are_inline, for ChildDef_Chameleon
if (is_string($def->content_model) &&
strpos($def->content_model, 'Inline') !== false) {
if ($name != 'del' && $name != 'ins') {
// this is for you, ins/del
$def->descendants_are_inline = true;
}
}
$this->contentSets->generateChildDef($def, $module);
}
// This can occur if there is a blank definition, but no base to
// mix it in with
if (!$def) return false;
// add information on required attributes
foreach ($def->attr as $attr_name => $attr_def) {
if ($attr_def->required) {
$def->required_attr[] = $attr_name;
}
}
return $def;
}
}
// vim: et sw=4 sts=4

91
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Injector/SafeObject.php Executable file
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<?php
/**
* Adds important param elements to inside of object in order to make
* things safe.
*/
class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
{
public $name = 'SafeObject';
public $needed = array('object', 'param');
protected $objectStack = array();
protected $paramStack = array();
// Keep this synchronized with AttrTransform/SafeParam.php
protected $addParam = array(
'allowScriptAccess' => 'never',
'allowNetworking' => 'internal',
);
protected $allowedParam = array(
'wmode' => true,
'movie' => true,
'flashvars' => true,
'src' => true,
'allowFullScreen' => true, // if omitted, assume to be 'false'
);
public function prepare($config, $context) {
parent::prepare($config, $context);
}
public function handleElement(&$token) {
if ($token->name == 'object') {
$this->objectStack[] = $token;
$this->paramStack[] = array();
$new = array($token);
foreach ($this->addParam as $name => $value) {
$new[] = new HTMLPurifier_Token_Empty('param', array('name' => $name, 'value' => $value));
}
$token = $new;
} elseif ($token->name == 'param') {
$nest = count($this->currentNesting) - 1;
if ($nest >= 0 && $this->currentNesting[$nest]->name === 'object') {
$i = count($this->objectStack) - 1;
if (!isset($token->attr['name'])) {
$token = false;
return;
}
$n = $token->attr['name'];
// We need this fix because YouTube doesn't supply a data
// attribute, which we need if a type is specified. This is
// *very* Flash specific.
if (!isset($this->objectStack[$i]->attr['data']) &&
($token->attr['name'] == 'movie' || $token->attr['name'] == 'src')) {
$this->objectStack[$i]->attr['data'] = $token->attr['value'];
}
// Check if the parameter is the correct value but has not
// already been added
if (
!isset($this->paramStack[$i][$n]) &&
isset($this->addParam[$n]) &&
$token->attr['name'] === $this->addParam[$n]
) {
// keep token, and add to param stack
$this->paramStack[$i][$n] = true;
} elseif (isset($this->allowedParam[$n])) {
// keep token, don't do anything to it
// (could possibly check for duplicates here)
} else {
$token = false;
}
} else {
// not directly inside an object, DENY!
$token = false;
}
}
}
public function handleEnd(&$token) {
// This is the WRONG way of handling the object and param stacks;
// we should be inserting them directly on the relevant object tokens
// so that the global stack handling handles it.
if ($token->name == 'object') {
array_pop($this->objectStack);
array_pop($this->paramStack);
}
}
}
// vim: et sw=4 sts=4

326
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Lexer.php Executable file
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<?php
/**
* Forgivingly lexes HTML (SGML-style) markup into tokens.
*
* A lexer parses a string of SGML-style markup and converts them into
* corresponding tokens. It doesn't check for well-formedness, although its
* internal mechanism may make this automatic (such as the case of
* HTMLPurifier_Lexer_DOMLex). There are several implementations to choose
* from.
*
* A lexer is HTML-oriented: it might work with XML, but it's not
* recommended, as we adhere to a subset of the specification for optimization
* reasons. This might change in the future. Also, most tokenizers are not
* expected to handle DTDs or PIs.
*
* This class should not be directly instantiated, but you may use create() to
* retrieve a default copy of the lexer. Being a supertype, this class
* does not actually define any implementation, but offers commonly used
* convenience functions for subclasses.
*
* @note The unit tests will instantiate this class for testing purposes, as
* many of the utility functions require a class to be instantiated.
* This means that, even though this class is not runnable, it will
* not be declared abstract.
*
* @par
*
* @note
* We use tokens rather than create a DOM representation because DOM would:
*
* @par
* -# Require more processing and memory to create,
* -# Is not streamable, and
* -# Has the entire document structure (html and body not needed).
*
* @par
* However, DOM is helpful in that it makes it easy to move around nodes
* without a lot of lookaheads to see when a tag is closed. This is a
* limitation of the token system and some workarounds would be nice.
*/
class HTMLPurifier_Lexer
{
/**
* Whether or not this lexer implements line-number/column-number tracking.
* If it does, set to true.
*/
public $tracksLineNumbers = false;
// -- STATIC ----------------------------------------------------------
/**
* Retrieves or sets the default Lexer as a Prototype Factory.
*
* By default HTMLPurifier_Lexer_DOMLex will be returned. There are
* a few exceptions involving special features that only DirectLex
* implements.
*
* @note The behavior of this class has changed, rather than accepting
* a prototype object, it now accepts a configuration object.
* To specify your own prototype, set %Core.LexerImpl to it.
* This change in behavior de-singletonizes the lexer object.
*
* @param $config Instance of HTMLPurifier_Config
* @return Concrete lexer.
*/
public static function create($config) {
if (!($config instanceof HTMLPurifier_Config)) {
$lexer = $config;
trigger_error("Passing a prototype to
HTMLPurifier_Lexer::create() is deprecated, please instead
use %Core.LexerImpl", E_USER_WARNING);
} else {
$lexer = $config->get('Core.LexerImpl');
}
$needs_tracking =
$config->get('Core.MaintainLineNumbers') ||
$config->get('Core.CollectErrors');
$inst = null;
if (is_object($lexer)) {
$inst = $lexer;
} else {
if (is_null($lexer)) { do {
// auto-detection algorithm
if ($needs_tracking) {
$lexer = 'DirectLex';
break;
}
if (
class_exists('DOMDocument') &&
method_exists('DOMDocument', 'loadHTML') &&
!extension_loaded('domxml')
) {
// check for DOM support, because while it's part of the
// core, it can be disabled compile time. Also, the PECL
// domxml extension overrides the default DOM, and is evil
// and nasty and we shan't bother to support it
$lexer = 'DOMLex';
} else {
$lexer = 'DirectLex';
}
} while(0); } // do..while so we can break
// instantiate recognized string names
switch ($lexer) {
case 'DOMLex':
$inst = new HTMLPurifier_Lexer_DOMLex();
break;
case 'DirectLex':
$inst = new HTMLPurifier_Lexer_DirectLex();
break;
case 'PH5P':
$inst = new HTMLPurifier_Lexer_PH5P();
break;
default:
throw new HTMLPurifier_Exception("Cannot instantiate unrecognized Lexer type " . htmlspecialchars($lexer));
}
}
if (!$inst) throw new HTMLPurifier_Exception('No lexer was instantiated');
// once PHP DOM implements native line numbers, or we
// hack out something using XSLT, remove this stipulation
if ($needs_tracking && !$inst->tracksLineNumbers) {
throw new HTMLPurifier_Exception('Cannot use lexer that does not support line numbers with Core.MaintainLineNumbers or Core.CollectErrors (use DirectLex instead)');
}
return $inst;
}
// -- CONVENIENCE MEMBERS ---------------------------------------------
public function __construct() {
$this->_entity_parser = new HTMLPurifier_EntityParser();
}
/**
* Most common entity to raw value conversion table for special entities.
*/
protected $_special_entity2str =
array(
'&quot;' => '"',
'&amp;' => '&',
'&lt;' => '<',
'&gt;' => '>',
'&#39;' => "'",
'&#039;' => "'",
'&#x27;' => "'"
);
/**
* Parses special entities into the proper characters.
*
* This string will translate escaped versions of the special characters
* into the correct ones.
*
* @warning
* You should be able to treat the output of this function as
* completely parsed, but that's only because all other entities should
* have been handled previously in substituteNonSpecialEntities()
*
* @param $string String character data to be parsed.
* @returns Parsed character data.
*/
public function parseData($string) {
// following functions require at least one character
if ($string === '') return '';
// subtracts amps that cannot possibly be escaped
$num_amp = substr_count($string, '&') - substr_count($string, '& ') -
($string[strlen($string)-1] === '&' ? 1 : 0);
if (!$num_amp) return $string; // abort if no entities
$num_esc_amp = substr_count($string, '&amp;');
$string = strtr($string, $this->_special_entity2str);
// code duplication for sake of optimization, see above
$num_amp_2 = substr_count($string, '&') - substr_count($string, '& ') -
($string[strlen($string)-1] === '&' ? 1 : 0);
if ($num_amp_2 <= $num_esc_amp) return $string;
// hmm... now we have some uncommon entities. Use the callback.
$string = $this->_entity_parser->substituteSpecialEntities($string);
return $string;
}
/**
* Lexes an HTML string into tokens.
*
* @param $string String HTML.
* @return HTMLPurifier_Token array representation of HTML.
*/
public function tokenizeHTML($string, $config, $context) {
trigger_error('Call to abstract class', E_USER_ERROR);
}
/**
* Translates CDATA sections into regular sections (through escaping).
*
* @param $string HTML string to process.
* @returns HTML with CDATA sections escaped.
*/
protected static function escapeCDATA($string) {
return preg_replace_callback(
'/<!\[CDATA\[(.+?)\]\]>/s',
array('HTMLPurifier_Lexer', 'CDATACallback'),
$string
);
}
/**
* Special CDATA case that is especially convoluted for <script>
*/
protected static function escapeCommentedCDATA($string) {
return preg_replace_callback(
'#<!--//--><!\[CDATA\[//><!--(.+?)//--><!\]\]>#s',
array('HTMLPurifier_Lexer', 'CDATACallback'),
$string
);
}
/**
* Special Internet Explorer conditional comments should be removed.
*/
protected static function removeIEConditional($string) {
return preg_replace(
'#<!--\[if [^>]+\]>.*?<!\[endif\]-->#si', // probably should generalize for all strings
'',
$string
);
}
/**
* Callback function for escapeCDATA() that does the work.
*
* @warning Though this is public in order to let the callback happen,
* calling it directly is not recommended.
* @params $matches PCRE matches array, with index 0 the entire match
* and 1 the inside of the CDATA section.
* @returns Escaped internals of the CDATA section.
*/
protected static function CDATACallback($matches) {
// not exactly sure why the character set is needed, but whatever
return htmlspecialchars($matches[1], ENT_COMPAT, 'UTF-8');
}
/**
* Takes a piece of HTML and normalizes it by converting entities, fixing
* encoding, extracting bits, and other good stuff.
* @todo Consider making protected
*/
public function normalize($html, $config, $context) {
// normalize newlines to \n
if ($config->get('Core.NormalizeNewlines')) {
$html = str_replace("\r\n", "\n", $html);
$html = str_replace("\r", "\n", $html);
}
if ($config->get('HTML.Trusted')) {
// escape convoluted CDATA
$html = $this->escapeCommentedCDATA($html);
}
// escape CDATA
$html = $this->escapeCDATA($html);
$html = $this->removeIEConditional($html);
// extract body from document if applicable
if ($config->get('Core.ConvertDocumentToFragment')) {
$e = false;
if ($config->get('Core.CollectErrors')) {
$e =& $context->get('ErrorCollector');
}
$new_html = $this->extractBody($html);
if ($e && $new_html != $html) {
$e->send(E_WARNING, 'Lexer: Extracted body');
}
$html = $new_html;
}
// expand entities that aren't the big five
$html = $this->_entity_parser->substituteNonSpecialEntities($html);
// clean into wellformed UTF-8 string for an SGML context: this has
// to be done after entity expansion because the entities sometimes
// represent non-SGML characters (horror, horror!)
$html = HTMLPurifier_Encoder::cleanUTF8($html);
// if processing instructions are to removed, remove them now
if ($config->get('Core.RemoveProcessingInstructions')) {
$html = preg_replace('#<\?.+?\?>#s', '', $html);
}
return $html;
}
/**
* Takes a string of HTML (fragment or document) and returns the content
* @todo Consider making protected
*/
public function extractBody($html) {
$matches = array();
$result = preg_match('!<body[^>]*>(.*)</body>!is', $html, $matches);
if ($result) {
return $matches[1];
} else {
return $html;
}
}
}
// vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Lexer/DOMLex.php Executable file
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<?php
/**
* Parser that uses PHP 5's DOM extension (part of the core).
*
* In PHP 5, the DOM XML extension was revamped into DOM and added to the core.
* It gives us a forgiving HTML parser, which we use to transform the HTML
* into a DOM, and then into the tokens. It is blazingly fast (for large
* documents, it performs twenty times faster than
* HTMLPurifier_Lexer_DirectLex,and is the default choice for PHP 5.
*
* @note Any empty elements will have empty tokens associated with them, even if
* this is prohibited by the spec. This is cannot be fixed until the spec
* comes into play.
*
* @note PHP's DOM extension does not actually parse any entities, we use
* our own function to do that.
*
* @warning DOM tends to drop whitespace, which may wreak havoc on indenting.
* If this is a huge problem, due to the fact that HTML is hand
* edited and you are unable to get a parser cache that caches the
* the output of HTML Purifier while keeping the original HTML lying
* around, you may want to run Tidy on the resulting output or use
* HTMLPurifier_DirectLex
*/
class HTMLPurifier_Lexer_DOMLex extends HTMLPurifier_Lexer
{
private $factory;
public function __construct() {
// setup the factory
parent::__construct();
$this->factory = new HTMLPurifier_TokenFactory();
}
public function tokenizeHTML($html, $config, $context) {
$html = $this->normalize($html, $config, $context);
// attempt to armor stray angled brackets that cannot possibly
// form tags and thus are probably being used as emoticons
if ($config->get('Core.AggressivelyFixLt')) {
$char = '[^a-z!\/]';
$comment = "/<!--(.*?)(-->|\z)/is";
$html = preg_replace_callback($comment, array($this, 'callbackArmorCommentEntities'), $html);
do {
$old = $html;
$html = preg_replace("/<($char)/i", '&lt;\\1', $html);
} while ($html !== $old);
$html = preg_replace_callback($comment, array($this, 'callbackUndoCommentSubst'), $html); // fix comments
}
// preprocess html, essential for UTF-8
$html = $this->wrapHTML($html, $config, $context);
$doc = new DOMDocument();
$doc->encoding = 'UTF-8'; // theoretically, the above has this covered
set_error_handler(array($this, 'muteErrorHandler'));
$doc->loadHTML($html);
restore_error_handler();
$tokens = array();
$this->tokenizeDOM(
$doc->getElementsByTagName('html')->item(0)-> // <html>
getElementsByTagName('body')->item(0)-> // <body>
getElementsByTagName('div')->item(0) // <div>
, $tokens);
return $tokens;
}
/**
* Iterative function that tokenizes a node, putting it into an accumulator.
* To iterate is human, to recurse divine - L. Peter Deutsch
* @param $node DOMNode to be tokenized.
* @param $tokens Array-list of already tokenized tokens.
* @returns Tokens of node appended to previously passed tokens.
*/
protected function tokenizeDOM($node, &$tokens) {
$level = 0;
$nodes = array($level => array($node));
$closingNodes = array();
do {
while (!empty($nodes[$level])) {
$node = array_shift($nodes[$level]); // FIFO
$collect = $level > 0 ? true : false;
$needEndingTag = $this->createStartNode($node, $tokens, $collect);
if ($needEndingTag) {
$closingNodes[$level][] = $node;
}
if ($node->childNodes && $node->childNodes->length) {
$level++;
$nodes[$level] = array();
foreach ($node->childNodes as $childNode) {
array_push($nodes[$level], $childNode);
}
}
}
$level--;
if ($level && isset($closingNodes[$level])) {
while($node = array_pop($closingNodes[$level])) {
$this->createEndNode($node, $tokens);
}
}
} while ($level > 0);
}
/**
* @param $node DOMNode to be tokenized.
* @param $tokens Array-list of already tokenized tokens.
* @param $collect Says whether or start and close are collected, set to
* false at first recursion because it's the implicit DIV
* tag you're dealing with.
* @returns bool if the token needs an endtoken
*/
protected function createStartNode($node, &$tokens, $collect) {
// intercept non element nodes. WE MUST catch all of them,
// but we're not getting the character reference nodes because
// those should have been preprocessed
if ($node->nodeType === XML_TEXT_NODE) {
$tokens[] = $this->factory->createText($node->data);
return false;
} elseif ($node->nodeType === XML_CDATA_SECTION_NODE) {
// undo libxml's special treatment of <script> and <style> tags
$last = end($tokens);
$data = $node->data;
// (note $node->tagname is already normalized)
if ($last instanceof HTMLPurifier_Token_Start && ($last->name == 'script' || $last->name == 'style')) {
$new_data = trim($data);
if (substr($new_data, 0, 4) === '<!--') {
$data = substr($new_data, 4);
if (substr($data, -3) === '-->') {
$data = substr($data, 0, -3);
} else {
// Highly suspicious! Not sure what to do...
}
}
}
$tokens[] = $this->factory->createText($this->parseData($data));
return false;
} elseif ($node->nodeType === XML_COMMENT_NODE) {
// this is code is only invoked for comments in script/style in versions
// of libxml pre-2.6.28 (regular comments, of course, are still
// handled regularly)
$tokens[] = $this->factory->createComment($node->data);
return false;
} elseif (
// not-well tested: there may be other nodes we have to grab
$node->nodeType !== XML_ELEMENT_NODE
) {
return false;
}
$attr = $node->hasAttributes() ? $this->transformAttrToAssoc($node->attributes) : array();
// We still have to make sure that the element actually IS empty
if (!$node->childNodes->length) {
if ($collect) {
$tokens[] = $this->factory->createEmpty($node->tagName, $attr);
}
return false;
} else {
if ($collect) {
$tokens[] = $this->factory->createStart(
$tag_name = $node->tagName, // somehow, it get's dropped
$attr
);
}
return true;
}
}
protected function createEndNode($node, &$tokens) {
$tokens[] = $this->factory->createEnd($node->tagName);
}
/**
* Converts a DOMNamedNodeMap of DOMAttr objects into an assoc array.
*
* @param $attribute_list DOMNamedNodeMap of DOMAttr objects.
* @returns Associative array of attributes.
*/
protected function transformAttrToAssoc($node_map) {
// NamedNodeMap is documented very well, so we're using undocumented
// features, namely, the fact that it implements Iterator and
// has a ->length attribute
if ($node_map->length === 0) return array();
$array = array();
foreach ($node_map as $attr) {
$array[$attr->name] = $attr->value;
}
return $array;
}
/**
* An error handler that mutes all errors
*/
public function muteErrorHandler($errno, $errstr) {}
/**
* Callback function for undoing escaping of stray angled brackets
* in comments
*/
public function callbackUndoCommentSubst($matches) {
return '<!--' . strtr($matches[1], array('&amp;'=>'&','&lt;'=>'<')) . $matches[2];
}
/**
* Callback function that entity-izes ampersands in comments so that
* callbackUndoCommentSubst doesn't clobber them
*/
public function callbackArmorCommentEntities($matches) {
return '<!--' . str_replace('&', '&amp;', $matches[1]) . $matches[2];
}
/**
* Wraps an HTML fragment in the necessary HTML
*/
protected function wrapHTML($html, $config, $context) {
$def = $config->getDefinition('HTML');
$ret = '';
if (!empty($def->doctype->dtdPublic) || !empty($def->doctype->dtdSystem)) {
$ret .= '<!DOCTYPE html ';
if (!empty($def->doctype->dtdPublic)) $ret .= 'PUBLIC "' . $def->doctype->dtdPublic . '" ';
if (!empty($def->doctype->dtdSystem)) $ret .= '"' . $def->doctype->dtdSystem . '" ';
$ret .= '>';
}
$ret .= '<html><head>';
$ret .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
// No protection if $html contains a stray </div>!
$ret .= '</head><body><div>'.$html.'</div></body></html>';
return $ret;
}
}
// vim: et sw=4 sts=4

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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Lexer/PH5P.php Executable file
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phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Strategy/MakeWellFormed.php Executable file
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<?php
/**
* Takes tokens makes them well-formed (balance end tags, etc.)
*
* Specification of the armor attributes this strategy uses:
*
* - MakeWellFormed_TagClosedError: This armor field is used to
* suppress tag closed errors for certain tokens [TagClosedSuppress],
* in particular, if a tag was generated automatically by HTML
* Purifier, we may rely on our infrastructure to close it for us
* and shouldn't report an error to the user [TagClosedAuto].
*/
class HTMLPurifier_Strategy_MakeWellFormed extends HTMLPurifier_Strategy
{
/**
* Array stream of tokens being processed.
*/
protected $tokens;
/**
* Current index in $tokens.
*/
protected $t;
/**
* Current nesting of elements.
*/
protected $stack;
/**
* Injectors active in this stream processing.
*/
protected $injectors;
/**
* Current instance of HTMLPurifier_Config.
*/
protected $config;
/**
* Current instance of HTMLPurifier_Context.
*/
protected $context;
public function execute($tokens, $config, $context) {
$definition = $config->getHTMLDefinition();
// local variables
$generator = new HTMLPurifier_Generator($config, $context);
$escape_invalid_tags = $config->get('Core.EscapeInvalidTags');
// used for autoclose early abortion
$global_parent_allowed_elements = array();
if (isset($definition->info[$definition->info_parent])) {
// may be unset under testing circumstances
$global_parent_allowed_elements = $definition->info[$definition->info_parent]->child->getAllowedElements($config);
}
$e = $context->get('ErrorCollector', true);
$t = false; // token index
$i = false; // injector index
$token = false; // the current token
$reprocess = false; // whether or not to reprocess the same token
$stack = array();
// member variables
$this->stack =& $stack;
$this->t =& $t;
$this->tokens =& $tokens;
$this->config = $config;
$this->context = $context;
// context variables
$context->register('CurrentNesting', $stack);
$context->register('InputIndex', $t);
$context->register('InputTokens', $tokens);
$context->register('CurrentToken', $token);
// -- begin INJECTOR --
$this->injectors = array();
$injectors = $config->getBatch('AutoFormat');
$def_injectors = $definition->info_injector;
$custom_injectors = $injectors['Custom'];
unset($injectors['Custom']); // special case
foreach ($injectors as $injector => $b) {
// XXX: Fix with a legitimate lookup table of enabled filters
if (strpos($injector, '.') !== false) continue;
$injector = "HTMLPurifier_Injector_$injector";
if (!$b) continue;
$this->injectors[] = new $injector;
}
foreach ($def_injectors as $injector) {
// assumed to be objects
$this->injectors[] = $injector;
}
foreach ($custom_injectors as $injector) {
if (!$injector) continue;
if (is_string($injector)) {
$injector = "HTMLPurifier_Injector_$injector";
$injector = new $injector;
}
$this->injectors[] = $injector;
}
// give the injectors references to the definition and context
// variables for performance reasons
foreach ($this->injectors as $ix => $injector) {
$error = $injector->prepare($config, $context);
if (!$error) continue;
array_splice($this->injectors, $ix, 1); // rm the injector
trigger_error("Cannot enable {$injector->name} injector because $error is not allowed", E_USER_WARNING);
}
// -- end INJECTOR --
// a note on reprocessing:
// In order to reduce code duplication, whenever some code needs
// to make HTML changes in order to make things "correct", the
// new HTML gets sent through the purifier, regardless of its
// status. This means that if we add a start token, because it
// was totally necessary, we don't have to update nesting; we just
// punt ($reprocess = true; continue;) and it does that for us.
// isset is in loop because $tokens size changes during loop exec
for (
$t = 0;
$t == 0 || isset($tokens[$t - 1]);
// only increment if we don't need to reprocess
$reprocess ? $reprocess = false : $t++
) {
// check for a rewind
if (is_int($i) && $i >= 0) {
// possibility: disable rewinding if the current token has a
// rewind set on it already. This would offer protection from
// infinite loop, but might hinder some advanced rewinding.
$rewind_to = $this->injectors[$i]->getRewind();
if (is_int($rewind_to) && $rewind_to < $t) {
if ($rewind_to < 0) $rewind_to = 0;
while ($t > $rewind_to) {
$t--;
$prev = $tokens[$t];
// indicate that other injectors should not process this token,
// but we need to reprocess it
unset($prev->skip[$i]);
$prev->rewind = $i;
if ($prev instanceof HTMLPurifier_Token_Start) array_pop($this->stack);
elseif ($prev instanceof HTMLPurifier_Token_End) $this->stack[] = $prev->start;
}
}
$i = false;
}
// handle case of document end
if (!isset($tokens[$t])) {
// kill processing if stack is empty
if (empty($this->stack)) break;
// peek
$top_nesting = array_pop($this->stack);
$this->stack[] = $top_nesting;
// send error [TagClosedSuppress]
if ($e && !isset($top_nesting->armor['MakeWellFormed_TagClosedError'])) {
$e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by document end', $top_nesting);
}
// append, don't splice, since this is the end
$tokens[] = new HTMLPurifier_Token_End($top_nesting->name);
// punt!
$reprocess = true;
continue;
}
$token = $tokens[$t];
//echo '<br>'; printTokens($tokens, $t); printTokens($this->stack);
//flush();
// quick-check: if it's not a tag, no need to process
if (empty($token->is_tag)) {
if ($token instanceof HTMLPurifier_Token_Text) {
foreach ($this->injectors as $i => $injector) {
if (isset($token->skip[$i])) continue;
if ($token->rewind !== null && $token->rewind !== $i) continue;
$injector->handleText($token);
$this->processToken($token, $i);
$reprocess = true;
break;
}
}
// another possibility is a comment
continue;
}
if (isset($definition->info[$token->name])) {
$type = $definition->info[$token->name]->child->type;
} else {
$type = false; // Type is unknown, treat accordingly
}
// quick tag checks: anything that's *not* an end tag
$ok = false;
if ($type === 'empty' && $token instanceof HTMLPurifier_Token_Start) {
// claims to be a start tag but is empty
$token = new HTMLPurifier_Token_Empty($token->name, $token->attr, $token->line, $token->col, $token->armor);
$ok = true;
} elseif ($type && $type !== 'empty' && $token instanceof HTMLPurifier_Token_Empty) {
// claims to be empty but really is a start tag
$this->swap(new HTMLPurifier_Token_End($token->name));
$this->insertBefore(new HTMLPurifier_Token_Start($token->name, $token->attr, $token->line, $token->col, $token->armor));
// punt (since we had to modify the input stream in a non-trivial way)
$reprocess = true;
continue;
} elseif ($token instanceof HTMLPurifier_Token_Empty) {
// real empty token
$ok = true;
} elseif ($token instanceof HTMLPurifier_Token_Start) {
// start tag
// ...unless they also have to close their parent
if (!empty($this->stack)) {
// Performance note: you might think that it's rather
// inefficient, recalculating the autoclose information
// for every tag that a token closes (since when we
// do an autoclose, we push a new token into the
// stream and then /process/ that, before
// re-processing this token.) But this is
// necessary, because an injector can make an
// arbitrary transformations to the autoclosing
// tokens we introduce, so things may have changed
// in the meantime. Also, doing the inefficient thing is
// "easy" to reason about (for certain perverse definitions
// of "easy")
$parent = array_pop($this->stack);
$this->stack[] = $parent;
if (isset($definition->info[$parent->name])) {
$elements = $definition->info[$parent->name]->child->getAllowedElements($config);
$autoclose = !isset($elements[$token->name]);
} else {
$autoclose = false;
}
if ($autoclose && $definition->info[$token->name]->wrap) {
// Check if an element can be wrapped by another
// element to make it valid in a context (for
// example, <ul><ul> needs a <li> in between)
$wrapname = $definition->info[$token->name]->wrap;
$wrapdef = $definition->info[$wrapname];
$elements = $wrapdef->child->getAllowedElements($config);
$parent_elements = $definition->info[$parent->name]->child->getAllowedElements($config);
if (isset($elements[$token->name]) && isset($parent_elements[$wrapname])) {
$newtoken = new HTMLPurifier_Token_Start($wrapname);
$this->insertBefore($newtoken);
$reprocess = true;
continue;
}
}
$carryover = false;
if ($autoclose && $definition->info[$parent->name]->formatting) {
$carryover = true;
}
if ($autoclose) {
// check if this autoclose is doomed to fail
// (this rechecks $parent, which his harmless)
$autoclose_ok = isset($global_parent_allowed_elements[$token->name]);
if (!$autoclose_ok) {
foreach ($this->stack as $ancestor) {
$elements = $definition->info[$ancestor->name]->child->getAllowedElements($config);
if (isset($elements[$token->name])) {
$autoclose_ok = true;
break;
}
if ($definition->info[$token->name]->wrap) {
$wrapname = $definition->info[$token->name]->wrap;
$wrapdef = $definition->info[$wrapname];
$wrap_elements = $wrapdef->child->getAllowedElements($config);
if (isset($wrap_elements[$token->name]) && isset($elements[$wrapname])) {
$autoclose_ok = true;
break;
}
}
}
}
if ($autoclose_ok) {
// errors need to be updated
$new_token = new HTMLPurifier_Token_End($parent->name);
$new_token->start = $parent;
if ($carryover) {
$element = clone $parent;
// [TagClosedAuto]
$element->armor['MakeWellFormed_TagClosedError'] = true;
$element->carryover = true;
$this->processToken(array($new_token, $token, $element));
} else {
$this->insertBefore($new_token);
}
// [TagClosedSuppress]
if ($e && !isset($parent->armor['MakeWellFormed_TagClosedError'])) {
if (!$carryover) {
$e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag auto closed', $parent);
} else {
$e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag carryover', $parent);
}
}
} else {
$this->remove();
}
$reprocess = true;
continue;
}
}
$ok = true;
}
if ($ok) {
foreach ($this->injectors as $i => $injector) {
if (isset($token->skip[$i])) continue;
if ($token->rewind !== null && $token->rewind !== $i) continue;
$injector->handleElement($token);
$this->processToken($token, $i);
$reprocess = true;
break;
}
if (!$reprocess) {
// ah, nothing interesting happened; do normal processing
$this->swap($token);
if ($token instanceof HTMLPurifier_Token_Start) {
$this->stack[] = $token;
} elseif ($token instanceof HTMLPurifier_Token_End) {
throw new HTMLPurifier_Exception('Improper handling of end tag in start code; possible error in MakeWellFormed');
}
}
continue;
}
// sanity check: we should be dealing with a closing tag
if (!$token instanceof HTMLPurifier_Token_End) {
throw new HTMLPurifier_Exception('Unaccounted for tag token in input stream, bug in HTML Purifier');
}
// make sure that we have something open
if (empty($this->stack)) {
if ($escape_invalid_tags) {
if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag to text');
$this->swap(new HTMLPurifier_Token_Text(
$generator->generateFromToken($token)
));
} else {
$this->remove();
if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Unnecessary end tag removed');
}
$reprocess = true;
continue;
}
// first, check for the simplest case: everything closes neatly.
// Eventually, everything passes through here; if there are problems
// we modify the input stream accordingly and then punt, so that
// the tokens get processed again.
$current_parent = array_pop($this->stack);
if ($current_parent->name == $token->name) {
$token->start = $current_parent;
foreach ($this->injectors as $i => $injector) {
if (isset($token->skip[$i])) continue;
if ($token->rewind !== null && $token->rewind !== $i) continue;
$injector->handleEnd($token);
$this->processToken($token, $i);
$this->stack[] = $current_parent;
$reprocess = true;
break;
}
continue;
}
// okay, so we're trying to close the wrong tag
// undo the pop previous pop
$this->stack[] = $current_parent;
// scroll back the entire nest, trying to find our tag.
// (feature could be to specify how far you'd like to go)
$size = count($this->stack);
// -2 because -1 is the last element, but we already checked that
$skipped_tags = false;
for ($j = $size - 2; $j >= 0; $j--) {
if ($this->stack[$j]->name == $token->name) {
$skipped_tags = array_slice($this->stack, $j);
break;
}
}
// we didn't find the tag, so remove
if ($skipped_tags === false) {
if ($escape_invalid_tags) {
$this->swap(new HTMLPurifier_Token_Text(
$generator->generateFromToken($token)
));
if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag to text');
} else {
$this->remove();
if ($e) $e->send(E_WARNING, 'Strategy_MakeWellFormed: Stray end tag removed');
}
$reprocess = true;
continue;
}
// do errors, in REVERSE $j order: a,b,c with </a></b></c>
$c = count($skipped_tags);
if ($e) {
for ($j = $c - 1; $j > 0; $j--) {
// notice we exclude $j == 0, i.e. the current ending tag, from
// the errors... [TagClosedSuppress]
if (!isset($skipped_tags[$j]->armor['MakeWellFormed_TagClosedError'])) {
$e->send(E_NOTICE, 'Strategy_MakeWellFormed: Tag closed by element end', $skipped_tags[$j]);
}
}
}
// insert tags, in FORWARD $j order: c,b,a with </a></b></c>
$replace = array($token);
for ($j = 1; $j < $c; $j++) {
// ...as well as from the insertions
$new_token = new HTMLPurifier_Token_End($skipped_tags[$j]->name);
$new_token->start = $skipped_tags[$j];
array_unshift($replace, $new_token);
if (isset($definition->info[$new_token->name]) && $definition->info[$new_token->name]->formatting) {
// [TagClosedAuto]
$element = clone $skipped_tags[$j];
$element->carryover = true;
$element->armor['MakeWellFormed_TagClosedError'] = true;
$replace[] = $element;
}
}
$this->processToken($replace);
$reprocess = true;
continue;
}
$context->destroy('CurrentNesting');
$context->destroy('InputTokens');
$context->destroy('InputIndex');
$context->destroy('CurrentToken');
unset($this->injectors, $this->stack, $this->tokens, $this->t);
return $tokens;
}
/**
* Processes arbitrary token values for complicated substitution patterns.
* In general:
*
* If $token is an array, it is a list of tokens to substitute for the
* current token. These tokens then get individually processed. If there
* is a leading integer in the list, that integer determines how many
* tokens from the stream should be removed.
*
* If $token is a regular token, it is swapped with the current token.
*
* If $token is false, the current token is deleted.
*
* If $token is an integer, that number of tokens (with the first token
* being the current one) will be deleted.
*
* @param $token Token substitution value
* @param $injector Injector that performed the substitution; default is if
* this is not an injector related operation.
*/
protected function processToken($token, $injector = -1) {
// normalize forms of token
if (is_object($token)) $token = array(1, $token);
if (is_int($token)) $token = array($token);
if ($token === false) $token = array(1);
if (!is_array($token)) throw new HTMLPurifier_Exception('Invalid token type from injector');
if (!is_int($token[0])) array_unshift($token, 1);
if ($token[0] === 0) throw new HTMLPurifier_Exception('Deleting zero tokens is not valid');
// $token is now an array with the following form:
// array(number nodes to delete, new node 1, new node 2, ...)
$delete = array_shift($token);
$old = array_splice($this->tokens, $this->t, $delete, $token);
if ($injector > -1) {
// determine appropriate skips
$oldskip = isset($old[0]) ? $old[0]->skip : array();
foreach ($token as $object) {
$object->skip = $oldskip;
$object->skip[$injector] = true;
}
}
}
/**
* Inserts a token before the current token. Cursor now points to
* this token. You must reprocess after this.
*/
private function insertBefore($token) {
array_splice($this->tokens, $this->t, 0, array($token));
}
/**
* Removes current token. Cursor now points to new token occupying previously
* occupied space. You must reprocess after this.
*/
private function remove() {
array_splice($this->tokens, $this->t, 1);
}
/**
* Swap current token with new token. Cursor points to new token (no
* change). You must reprocess after this.
*/
private function swap($token) {
$this->tokens[$this->t] = $token;
}
}
// vim: et sw=4 sts=4

98
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/TagTransform/Font.php Executable file
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<?php
/**
* Transforms FONT tags to the proper form (SPAN with CSS styling)
*
* This transformation takes the three proprietary attributes of FONT and
* transforms them into their corresponding CSS attributes. These are color,
* face, and size.
*
* @note Size is an interesting case because it doesn't map cleanly to CSS.
* Thanks to
* http://style.cleverchimp.com/font_size_intervals/altintervals.html
* for reasonable mappings.
* @warning This doesn't work completely correctly; specifically, this
* TagTransform operates before well-formedness is enforced, so
* the "active formatting elements" algorithm doesn't get applied.
*/
class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
{
public $transform_to = 'span';
protected $_size_lookup = array(
'0' => 'xx-small',
'1' => 'xx-small',
'2' => 'small',
'3' => 'medium',
'4' => 'large',
'5' => 'x-large',
'6' => 'xx-large',
'7' => '300%',
'-1' => 'smaller',
'-2' => '60%',
'+1' => 'larger',
'+2' => '150%',
'+3' => '200%',
'+4' => '300%'
);
public function transform($tag, $config, $context) {
if ($tag instanceof HTMLPurifier_Token_End) {
$new_tag = clone $tag;
$new_tag->name = $this->transform_to;
return $new_tag;
}
$attr = $tag->attr;
$prepend_style = '';
// handle color transform
if (isset($attr['color'])) {
$prepend_style .= 'color:' . $attr['color'] . ';';
unset($attr['color']);
}
// handle face transform
if (isset($attr['face'])) {
$prepend_style .= 'font-family:' . $attr['face'] . ';';
unset($attr['face']);
}
// handle size transform
if (isset($attr['size'])) {
// normalize large numbers
if ($attr['size'] !== '') {
if ($attr['size']{0} == '+' || $attr['size']{0} == '-') {
$size = (int) $attr['size'];
if ($size < -2) $attr['size'] = '-2';
if ($size > 4) $attr['size'] = '+4';
} else {
$size = (int) $attr['size'];
if ($size > 7) $attr['size'] = '7';
}
}
if (isset($this->_size_lookup[$attr['size']])) {
$prepend_style .= 'font-size:' .
$this->_size_lookup[$attr['size']] . ';';
}
unset($attr['size']);
}
if ($prepend_style) {
$attr['style'] = isset($attr['style']) ?
$prepend_style . $attr['style'] :
$prepend_style;
}
$new_tag = clone $tag;
$new_tag->name = $this->transform_to;
$new_tag->attr = $attr;
return $new_tag;
}
}
// vim: et sw=4 sts=4

57
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/Token/Tag.php Executable file
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<?php
/**
* Abstract class of a tag token (start, end or empty), and its behavior.
*/
class HTMLPurifier_Token_Tag extends HTMLPurifier_Token
{
/**
* Static bool marker that indicates the class is a tag.
*
* This allows us to check objects with <tt>!empty($obj->is_tag)</tt>
* without having to use a function call <tt>is_a()</tt>.
*/
public $is_tag = true;
/**
* The lower-case name of the tag, like 'a', 'b' or 'blockquote'.
*
* @note Strictly speaking, XML tags are case sensitive, so we shouldn't
* be lower-casing them, but these tokens cater to HTML tags, which are
* insensitive.
*/
public $name;
/**
* Associative array of the tag's attributes.
*/
public $attr = array();
/**
* Non-overloaded constructor, which lower-cases passed tag name.
*
* @param $name String name.
* @param $attr Associative array of attributes.
*/
public function __construct($name, $attr = array(), $line = null, $col = null, $armor = array()) {
$this->name = ctype_lower($name) ? $name : strtolower($name);
foreach ($attr as $key => $value) {
// normalization only necessary when key is not lowercase
if (!ctype_lower($key)) {
$new_key = strtolower($key);
if (!isset($attr[$new_key])) {
$attr[$new_key] = $attr[$key];
}
if ($new_key !== $key) {
unset($attr[$key]);
}
}
}
$this->attr = $attr;
$this->line = $line;
$this->col = $col;
$this->armor = $armor;
}
}
// vim: et sw=4 sts=4

204
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URI.php Executable file
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<?php
/**
* HTML Purifier's internal representation of a URI.
* @note
* Internal data-structures are completely escaped. If the data needs
* to be used in a non-URI context (which is very unlikely), be sure
* to decode it first. The URI may not necessarily be well-formed until
* validate() is called.
*/
class HTMLPurifier_URI
{
public $scheme, $userinfo, $host, $port, $path, $query, $fragment;
/**
* @note Automatically normalizes scheme and port
*/
public function __construct($scheme, $userinfo, $host, $port, $path, $query, $fragment) {
$this->scheme = is_null($scheme) || ctype_lower($scheme) ? $scheme : strtolower($scheme);
$this->userinfo = $userinfo;
$this->host = $host;
$this->port = is_null($port) ? $port : (int) $port;
$this->path = $path;
$this->query = $query;
$this->fragment = $fragment;
}
/**
* Retrieves a scheme object corresponding to the URI's scheme/default
* @param $config Instance of HTMLPurifier_Config
* @param $context Instance of HTMLPurifier_Context
* @return Scheme object appropriate for validating this URI
*/
public function getSchemeObj($config, $context) {
$registry = HTMLPurifier_URISchemeRegistry::instance();
if ($this->scheme !== null) {
$scheme_obj = $registry->getScheme($this->scheme, $config, $context);
if (!$scheme_obj) return false; // invalid scheme, clean it out
} else {
// no scheme: retrieve the default one
$def = $config->getDefinition('URI');
$scheme_obj = $registry->getScheme($def->defaultScheme, $config, $context);
if (!$scheme_obj) {
// something funky happened to the default scheme object
trigger_error(
'Default scheme object "' . $def->defaultScheme . '" was not readable',
E_USER_WARNING
);
return false;
}
}
return $scheme_obj;
}
/**
* Generic validation method applicable for all schemes. May modify
* this URI in order to get it into a compliant form.
* @param $config Instance of HTMLPurifier_Config
* @param $context Instance of HTMLPurifier_Context
* @return True if validation/filtering succeeds, false if failure
*/
public function validate($config, $context) {
// ABNF definitions from RFC 3986
$chars_sub_delims = '!$&\'()*+,;=';
$chars_gen_delims = ':/?#[]@';
$chars_pchar = $chars_sub_delims . ':@';
// validate host
if (!is_null($this->host)) {
$host_def = new HTMLPurifier_AttrDef_URI_Host();
$this->host = $host_def->validate($this->host, $config, $context);
if ($this->host === false) $this->host = null;
}
// validate scheme
// NOTE: It's not appropriate to check whether or not this
// scheme is in our registry, since a URIFilter may convert a
// URI that we don't allow into one we do. So instead, we just
// check if the scheme can be dropped because there is no host
// and it is our default scheme.
if (!is_null($this->scheme) && is_null($this->host) || $this->host === '') {
// support for relative paths is pretty abysmal when the
// scheme is present, so axe it when possible
$def = $config->getDefinition('URI');
if ($def->defaultScheme === $this->scheme) {
$this->scheme = null;
}
}
// validate username
if (!is_null($this->userinfo)) {
$encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . ':');
$this->userinfo = $encoder->encode($this->userinfo);
}
// validate port
if (!is_null($this->port)) {
if ($this->port < 1 || $this->port > 65535) $this->port = null;
}
// validate path
$path_parts = array();
$segments_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/');
if (!is_null($this->host)) { // this catches $this->host === ''
// path-abempty (hier and relative)
// http://www.example.com/my/path
// //www.example.com/my/path (looks odd, but works, and
// recognized by most browsers)
// (this set is valid or invalid on a scheme by scheme
// basis, so we'll deal with it later)
// file:///my/path
// ///my/path
$this->path = $segments_encoder->encode($this->path);
} elseif ($this->path !== '') {
if ($this->path[0] === '/') {
// path-absolute (hier and relative)
// http:/my/path
// /my/path
if (strlen($this->path) >= 2 && $this->path[1] === '/') {
// This could happen if both the host gets stripped
// out
// http://my/path
// //my/path
$this->path = '';
} else {
$this->path = $segments_encoder->encode($this->path);
}
} elseif (!is_null($this->scheme)) {
// path-rootless (hier)
// http:my/path
// Short circuit evaluation means we don't need to check nz
$this->path = $segments_encoder->encode($this->path);
} else {
// path-noscheme (relative)
// my/path
// (once again, not checking nz)
$segment_nc_encoder = new HTMLPurifier_PercentEncoder($chars_sub_delims . '@');
$c = strpos($this->path, '/');
if ($c !== false) {
$this->path =
$segment_nc_encoder->encode(substr($this->path, 0, $c)) .
$segments_encoder->encode(substr($this->path, $c));
} else {
$this->path = $segment_nc_encoder->encode($this->path);
}
}
} else {
// path-empty (hier and relative)
$this->path = ''; // just to be safe
}
// qf = query and fragment
$qf_encoder = new HTMLPurifier_PercentEncoder($chars_pchar . '/?');
if (!is_null($this->query)) {
$this->query = $qf_encoder->encode($this->query);
}
if (!is_null($this->fragment)) {
$this->fragment = $qf_encoder->encode($this->fragment);
}
return true;
}
/**
* Convert URI back to string
* @return String URI appropriate for output
*/
public function toString() {
// reconstruct authority
$authority = null;
// there is a rendering difference between a null authority
// (http:foo-bar) and an empty string authority
// (http:///foo-bar).
if (!is_null($this->host)) {
$authority = '';
if(!is_null($this->userinfo)) $authority .= $this->userinfo . '@';
$authority .= $this->host;
if(!is_null($this->port)) $authority .= ':' . $this->port;
}
// Reconstruct the result
// One might wonder about parsing quirks from browsers after
// this reconstruction. Unfortunately, parsing behavior depends
// on what *scheme* was employed (file:///foo is handled *very*
// differently than http:///foo), so unfortunately we have to
// defer to the schemes to do the right thing.
$result = '';
if (!is_null($this->scheme)) $result .= $this->scheme . ':';
if (!is_null($authority)) $result .= '//' . $authority;
$result .= $this->path;
if (!is_null($this->query)) $result .= '?' . $this->query;
if (!is_null($this->fragment)) $result .= '#' . $this->fragment;
return $result;
}
}
// vim: et sw=4 sts=4

11
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIFilter/DisableResources.php Normal file
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<?php
class HTMLPurifier_URIFilter_DisableResources extends HTMLPurifier_URIFilter
{
public $name = 'DisableResources';
public function filter(&$uri, $config, $context) {
return !$context->get('EmbeddedURI', true);
}
}
// vim: et sw=4 sts=4

89
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme.php Executable file
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<?php
/**
* Validator for the components of a URI for a specific scheme
*/
abstract class HTMLPurifier_URIScheme
{
/**
* Scheme's default port (integer). If an explicit port number is
* specified that coincides with the default port, it will be
* elided.
*/
public $default_port = null;
/**
* Whether or not URIs of this schem are locatable by a browser
* http and ftp are accessible, while mailto and news are not.
*/
public $browsable = false;
/**
* Whether or not the URI always uses <hier_part>, resolves edge cases
* with making relative URIs absolute
*/
public $hierarchical = false;
/**
* Whether or not the URI may omit a hostname when the scheme is
* explicitly specified, ala file:///path/to/file. As of writing,
* 'file' is the only scheme that browsers support his properly.
*/
public $may_omit_host = false;
/**
* Validates the components of a URI for a specific scheme.
* @param $uri Reference to a HTMLPurifier_URI object
* @param $config HTMLPurifier_Config object
* @param $context HTMLPurifier_Context object
* @return Bool success or failure
*/
public abstract function doValidate(&$uri, $config, $context);
/**
* Public interface for validating components of a URI. Performs a
* bunch of default actions. Don't overload this method.
* @param $uri Reference to a HTMLPurifier_URI object
* @param $config HTMLPurifier_Config object
* @param $context HTMLPurifier_Context object
* @return Bool success or failure
*/
public function validate(&$uri, $config, $context) {
if ($this->default_port == $uri->port) $uri->port = null;
// kludge: browsers do funny things when the scheme but not the
// authority is set
if (!$this->may_omit_host &&
// if the scheme is present, a missing host is always in error
(!is_null($uri->scheme) && ($uri->host === '' || is_null($uri->host))) ||
// if the scheme is not present, a *blank* host is in error,
// since this translates into '///path' which most browsers
// interpret as being 'http://path'.
(is_null($uri->scheme) && $uri->host === '')
) {
do {
if (is_null($uri->scheme)) {
if (substr($uri->path, 0, 2) != '//') {
$uri->host = null;
break;
}
// URI is '////path', so we cannot nullify the
// host to preserve semantics. Try expanding the
// hostname instead (fall through)
}
// first see if we can manually insert a hostname
$host = $config->get('URI.Host');
if (!is_null($host)) {
$uri->host = $host;
} else {
// we can't do anything sensible, reject the URL.
return false;
}
} while (false);
}
return $this->doValidate($uri, $config, $context);
}
}
// vim: et sw=4 sts=4

96
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/data.php Normal file
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<?php
/**
* Implements data: URI for base64 encoded images supported by GD.
*/
class HTMLPurifier_URIScheme_data extends HTMLPurifier_URIScheme {
public $browsable = true;
public $allowed_types = array(
// you better write validation code for other types if you
// decide to allow them
'image/jpeg' => true,
'image/gif' => true,
'image/png' => true,
);
// this is actually irrelevant since we only write out the path
// component
public $may_omit_host = true;
public function doValidate(&$uri, $config, $context) {
$result = explode(',', $uri->path, 2);
$is_base64 = false;
$charset = null;
$content_type = null;
if (count($result) == 2) {
list($metadata, $data) = $result;
// do some legwork on the metadata
$metas = explode(';', $metadata);
while(!empty($metas)) {
$cur = array_shift($metas);
if ($cur == 'base64') {
$is_base64 = true;
break;
}
if (substr($cur, 0, 8) == 'charset=') {
// doesn't match if there are arbitrary spaces, but
// whatever dude
if ($charset !== null) continue; // garbage
$charset = substr($cur, 8); // not used
} else {
if ($content_type !== null) continue; // garbage
$content_type = $cur;
}
}
} else {
$data = $result[0];
}
if ($content_type !== null && empty($this->allowed_types[$content_type])) {
return false;
}
if ($charset !== null) {
// error; we don't allow plaintext stuff
$charset = null;
}
$data = rawurldecode($data);
if ($is_base64) {
$raw_data = base64_decode($data);
} else {
$raw_data = $data;
}
// XXX probably want to refactor this into a general mechanism
// for filtering arbitrary content types
$file = tempnam("/tmp", "");
file_put_contents($file, $raw_data);
if (function_exists('exif_imagetype')) {
$image_code = exif_imagetype($file);
} elseif (function_exists('getimagesize')) {
set_error_handler(array($this, 'muteErrorHandler'));
$info = getimagesize($file);
restore_error_handler();
if ($info == false) return false;
$image_code = $info[2];
} else {
trigger_error("could not find exif_imagetype or getimagesize functions", E_USER_ERROR);
}
$real_content_type = image_type_to_mime_type($image_code);
if ($real_content_type != $content_type) {
// we're nice guys; if the content type is something else we
// support, change it over
if (empty($this->allowed_types[$real_content_type])) return false;
$content_type = $real_content_type;
}
// ok, it's kosher, rewrite what we need
$uri->userinfo = null;
$uri->host = null;
$uri->port = null;
$uri->fragment = null;
$uri->query = null;
$uri->path = "$content_type;base64," . base64_encode($raw_data);
return true;
}
public function muteErrorHandler($errno, $errstr) {}
}

32
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/file.php Normal file
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<?php
/**
* Validates file as defined by RFC 1630 and RFC 1738.
*/
class HTMLPurifier_URIScheme_file extends HTMLPurifier_URIScheme {
// Generally file:// URLs are not accessible from most
// machines, so placing them as an img src is incorrect.
public $browsable = false;
// Basically the *only* URI scheme for which this is true, since
// accessing files on the local machine is very common. In fact,
// browsers on some operating systems don't understand the
// authority, though I hear it is used on Windows to refer to
// network shares.
public $may_omit_host = true;
public function doValidate(&$uri, $config, $context) {
// Authentication method is not supported
$uri->userinfo = null;
// file:// makes no provisions for accessing the resource
$uri->port = null;
// While it seems to work on Firefox, the querystring has
// no possible effect and is thus stripped.
$uri->query = null;
return true;
}
}
// vim: et sw=4 sts=4

42
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/ftp.php Executable file
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<?php
/**
* Validates ftp (File Transfer Protocol) URIs as defined by generic RFC 1738.
*/
class HTMLPurifier_URIScheme_ftp extends HTMLPurifier_URIScheme {
public $default_port = 21;
public $browsable = true; // usually
public $hierarchical = true;
public function doValidate(&$uri, $config, $context) {
$uri->query = null;
// typecode check
$semicolon_pos = strrpos($uri->path, ';'); // reverse
if ($semicolon_pos !== false) {
$type = substr($uri->path, $semicolon_pos + 1); // no semicolon
$uri->path = substr($uri->path, 0, $semicolon_pos);
$type_ret = '';
if (strpos($type, '=') !== false) {
// figure out whether or not the declaration is correct
list($key, $typecode) = explode('=', $type, 2);
if ($key !== 'type') {
// invalid key, tack it back on encoded
$uri->path .= '%3B' . $type;
} elseif ($typecode === 'a' || $typecode === 'i' || $typecode === 'd') {
$type_ret = ";type=$typecode";
}
} else {
$uri->path .= '%3B' . $type;
}
$uri->path = str_replace(';', '%3B', $uri->path);
$uri->path .= $type_ret;
}
return true;
}
}
// vim: et sw=4 sts=4

19
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/http.php Executable file
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<?php
/**
* Validates http (HyperText Transfer Protocol) as defined by RFC 2616
*/
class HTMLPurifier_URIScheme_http extends HTMLPurifier_URIScheme {
public $default_port = 80;
public $browsable = true;
public $hierarchical = true;
public function doValidate(&$uri, $config, $context) {
$uri->userinfo = null;
return true;
}
}
// vim: et sw=4 sts=4

27
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/mailto.php Executable file
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<?php
// VERY RELAXED! Shouldn't cause problems, not even Firefox checks if the
// email is valid, but be careful!
/**
* Validates mailto (for E-mail) according to RFC 2368
* @todo Validate the email address
* @todo Filter allowed query parameters
*/
class HTMLPurifier_URIScheme_mailto extends HTMLPurifier_URIScheme {
public $browsable = false;
public $may_omit_host = true;
public function doValidate(&$uri, $config, $context) {
$uri->userinfo = null;
$uri->host = null;
$uri->port = null;
// we need to validate path against RFC 2368's addr-spec
return true;
}
}
// vim: et sw=4 sts=4

22
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/news.php Executable file
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<?php
/**
* Validates news (Usenet) as defined by generic RFC 1738
*/
class HTMLPurifier_URIScheme_news extends HTMLPurifier_URIScheme {
public $browsable = false;
public $may_omit_host = true;
public function doValidate(&$uri, $config, $context) {
$uri->userinfo = null;
$uri->host = null;
$uri->port = null;
$uri->query = null;
// typecode check needed on path
return true;
}
}
// vim: et sw=4 sts=4

19
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/URIScheme/nntp.php Executable file
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<?php
/**
* Validates nntp (Network News Transfer Protocol) as defined by generic RFC 1738
*/
class HTMLPurifier_URIScheme_nntp extends HTMLPurifier_URIScheme {
public $default_port = 119;
public $browsable = false;
public function doValidate(&$uri, $config, $context) {
$uri->userinfo = null;
$uri->query = null;
return true;
}
}
// vim: et sw=4 sts=4

103
phpgwapi/inc/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php Executable file
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<?php
/**
* Performs safe variable parsing based on types which can be used by
* users. This may not be able to represent all possible data inputs,
* however.
*/
class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
{
protected function parseImplementation($var, $type, $allow_null) {
if ($allow_null && $var === null) return null;
switch ($type) {
// Note: if code "breaks" from the switch, it triggers a generic
// exception to be thrown. Specific errors can be specifically
// done here.
case self::MIXED :
case self::ISTRING :
case self::STRING :
case self::TEXT :
case self::ITEXT :
return $var;
case self::INT :
if (is_string($var) && ctype_digit($var)) $var = (int) $var;
return $var;
case self::FLOAT :
if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
return $var;
case self::BOOL :
if (is_int($var) && ($var === 0 || $var === 1)) {
$var = (bool) $var;
} elseif (is_string($var)) {
if ($var == 'on' || $var == 'true' || $var == '1') {
$var = true;
} elseif ($var == 'off' || $var == 'false' || $var == '0') {
$var = false;
} else {
throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
}
}
return $var;
case self::ALIST :
case self::HASH :
case self::LOOKUP :
if (is_string($var)) {
// special case: technically, this is an array with
// a single empty string item, but having an empty
// array is more intuitive
if ($var == '') return array();
if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
// simplistic string to array method that only works
// for simple lists of tag names or alphanumeric characters
$var = explode(',',$var);
} else {
$var = preg_split('/(,|[\n\r]+)/', $var);
}
// remove spaces
foreach ($var as $i => $j) $var[$i] = trim($j);
if ($type === self::HASH) {
// key:value,key2:value2
$nvar = array();
foreach ($var as $keypair) {
$c = explode(':', $keypair, 2);
if (!isset($c[1])) continue;
$nvar[trim($c[0])] = trim($c[1]);
}
$var = $nvar;
}
}
if (!is_array($var)) break;
$keys = array_keys($var);
if ($keys === array_keys($keys)) {
if ($type == self::ALIST) return $var;
elseif ($type == self::LOOKUP) {
$new = array();
foreach ($var as $key) {
$new[$key] = true;
}
return $new;
} else break;
}
if ($type === self::ALIST) {
trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING);
return array_values($var);
}
if ($type === self::LOOKUP) {
foreach ($var as $key => $value) {
if ($value !== true) {
trigger_error("Lookup array has non-true value at key '$key'; maybe your input array was not indexed numerically", E_USER_WARNING);
}
$var[$key] = true;
}
}
return $var;
default:
$this->errorInconsistent(__CLASS__, $type);
}
$this->errorGeneric($var, $type);
}
}
// vim: et sw=4 sts=4