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<title>[52326] trunk: KSES: Use the polyfilled PHP 8 string functions in `_wp_kses_allow_pdf_objects()`:</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/52326">52326</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/52326","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-12-06 11:06:40 +0000 (Mon, 06 Dec 2021)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>KSES: Use the polyfilled PHP 8 string functions in `_wp_kses_allow_pdf_objects()`:
* `str_contains()`
* `str_ends_with()`
* `str_starts_with()`
Additionally, include a test for a PDF file in an `<object>` tag with an unsupported protocol.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/51963">[51963]</a>, <a href="https://core.trac.wordpress.org/changeset/52039">[52039]</a>, <a href="https://core.trac.wordpress.org/changeset/52040">[52040]</a>, <a href="https://core.trac.wordpress.org/changeset/52304">[52304]</a>, <a href="https://core.trac.wordpress.org/changeset/52309">[52309]</a>.
Props TobiasBg, ramonopoly.
See <a href="https://core.trac.wordpress.org/ticket/54261">#54261</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesksesphp">trunk/src/wp-includes/kses.php</a></li>
<li><a href="#trunktestsphpunittestsksesphp">trunk/tests/phpunit/tests/kses.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludesksesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/kses.php 2021-12-06 10:12:28 UTC (rev 52325)
+++ trunk/src/wp-includes/kses.php 2021-12-06 11:06:40 UTC (rev 52326)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2593,12 +2593,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function _wp_kses_allow_pdf_objects( $url ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // We're not interested in URLs that contain query strings or fragments.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( strpos( $url, '?' ) !== false || strpos( $url, '#' ) !== false ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( str_contains( $url, '?' ) || str_contains( $url, '#' ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // If it doesn't have a PDF extension, it's not safe.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( 0 !== substr_compare( $url, '.pdf', -4, 4, true ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! str_ends_with( $url, '.pdf' ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2607,7 +2607,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $parsed_url = wp_parse_url( $upload_info['url'] );
</span><span class="cx" style="display: block; padding: 0 10px"> $upload_host = isset( $parsed_url['host'] ) ? $parsed_url['host'] : '';
</span><span class="cx" style="display: block; padding: 0 10px"> $upload_port = isset( $parsed_url['port'] ) ? ':' . $parsed_url['port'] : '';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( 0 === strpos( $url, "http://$upload_host$upload_port/" ) || 0 === strpos( $url, "https://$upload_host$upload_port/" ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ if ( str_starts_with( $url, "http://$upload_host$upload_port/" )
+ || str_starts_with( $url, "https://$upload_host$upload_port/" )
+ ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> return true;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre></div>
<a id="trunktestsphpunittestsksesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/kses.php 2021-12-06 10:12:28 UTC (rev 52325)
+++ trunk/tests/phpunit/tests/kses.php 2021-12-06 11:06:40 UTC (rev 52326)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1588,10 +1588,14 @@
</span><span class="cx" style="display: block; padding: 0 10px"> '<object type="application/pdf" data="https://example.org/foo.php" />',
</span><span class="cx" style="display: block; padding: 0 10px"> '',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- 'protocol relative url' => array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'protocol-relative url' => array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '<object type="application/pdf" data="//example.org/foo.pdf" />',
</span><span class="cx" style="display: block; padding: 0 10px"> '',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'unsupported protocol' => array(
+ '<object type="application/pdf" data="ftp://example.org/foo.pdf" />',
+ '',
+ ),
</ins><span class="cx" style="display: block; padding: 0 10px"> 'relative url' => array(
</span><span class="cx" style="display: block; padding: 0 10px"> '<object type="application/pdf" data="/cat/foo.pdf" />',
</span><span class="cx" style="display: block; padding: 0 10px"> '',
</span></span></pre>
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