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<title>[7027] sites/trunk/wordcamp.org/public_html/wp-content/plugins/wordcamp-payments/includes/sponsor-payment-stripe.php: WordCamp Payments: Verify payload signature before unslashing data.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/7027">7027</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/7027","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>iandunn</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2018-04-04 19:41:21 +0000 (Wed, 04 Apr 2018)</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'>WordCamp Payments: Verify payload signature before unslashing data.
The signature is generated on slashed data, so it needs to be verified against slashed data as well. Otherwise there are cases where the verification will incorrectly fail. For example, `Bogota` gets encoded as `Bogot\u00e1`, but is `Bogotu00e1` after being unslashed, so it won't match the original.</pre>
<h3>Modified Paths</h3>
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<li><a href="#sitestrunkwordcamporgpublic_htmlwpcontentpluginswordcamppaymentsincludessponsorpaymentstripephp">sites/trunk/wordcamp.org/public_html/wp-content/plugins/wordcamp-payments/includes/sponsor-payment-stripe.php</a></li>
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<h3>Diff</h3>
<a id="sitestrunkwordcamporgpublic_htmlwpcontentpluginswordcamppaymentsincludessponsorpaymentstripephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/wordcamp.org/public_html/wp-content/plugins/wordcamp-payments/includes/sponsor-payment-stripe.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/wordcamp.org/public_html/wp-content/plugins/wordcamp-payments/includes/sponsor-payment-stripe.php 2018-04-04 19:23:44 UTC (rev 7026)
+++ sites/trunk/wordcamp.org/public_html/wp-content/plugins/wordcamp-payments/includes/sponsor-payment-stripe.php 2018-04-04 19:41:21 UTC (rev 7027)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -223,14 +223,13 @@
</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"> // Make sure our data hasn't been altered.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $payment_data_str = wp_unslash( $payment_data_json );
</del><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! hash_equals( hash_hmac( 'sha256', $payment_data_str, $data['keys']['hmac_key'] ), $payment_data_signature ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! hash_equals( hash_hmac( 'sha256', $payment_data_json, $data['keys']['hmac_key'] ), $payment_data_signature ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $data['errors'][] = 'Could not verify payload signature.';
</span><span class="cx" style="display: block; padding: 0 10px"> return;
</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">- $payment_data = json_decode( $payment_data_str, true );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $payment_data = json_decode( wp_unslash( $payment_data_json ), true );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> switch ( $payment_data['payment_type'] ) {
</span><span class="cx" style="display: block; padding: 0 10px"> case 'invoice' :
</span></span></pre>
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