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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://issues.shibboleth.net/jira/browse/IDP" style="color: #3b73af; text-decoration: none">Identity Provider</a> / <a href="https://issues.shibboleth.net/jira/browse/IDP-1437" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-35f0396d-6033-41d9-8e55-c7916f5e1392" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://issues.shibboleth.net/jira/browse/IDP-1437" style="color: #3b73af; text-decoration: none">IDP-1437</a> </td>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://issues.shibboleth.net/jira/browse/IDP-1437" style="color: #3b73af; text-decoration: none">CAS: Unicode SMP characters cause invalid XML</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-35f0396d-6033-41d9-8e55-c7916f5e1392" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 3.3.3 </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="serac@vt.edu" id="email_serac@vt.edu" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=serac%40vt.edu" style="color:#0052cc;; color: #3b73af; text-decoration: none">Marvin S Addison</a> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> CAS </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 08/Apr/19 12:26 PM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Server environment: RHEL 7.6, Tomcat 8.5, Oracle Java 1.8</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">CAS environment: Causes issues with at least mod_auth_cas for Apache http; the python-cas module in Python; and with Tomcat using Pac4j</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Client environment: Irrelevant - but tested on Chrome on RHEL 7, Firefox on RHEL7 and Chrome on Ubuntu.</p> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-minor-67a8a1a1-184f-4f59-944c-d9e7044bb0a7" height="16" width="16" border="0" align="absmiddle" alt="Minor" style="vertical-align: text-bottom"> Minor </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="cucpqs6yzxg6qzb6pkzgpwexxpw=@https://webauth.soton.ac.uk/shibboleth" id="email_cucpqs6yzxg6qzb6pkzgpwexxpw=@https://webauth.soton.ac.uk/shibboleth" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=cucpqs6yzxg6qzb6pkzgpwexxpw%3D%40https%3A%2F%2Fwebauth.soton.ac.uk%2Fshibboleth" style="color:#0052cc;; color: #3b73af; text-decoration: none">cucpqs6yzxg6qzb6pkzgpwexxpw=@https://webauth.soton.ac.uk/shibboleth</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">We've hit upon an obscure bug with CAS when attributes to be returned as part of the serviceValidate response contain characters outside of the Basic Multilingual Plane in Unicode (i.e. outside of the range 0x0000-0xffff). The bug seems to stem from the fact that the org.apache.commons.lang.StringEscapeUtils.escapeXml() call doesn't support these characters (see <a href="https://issues.apache.org/jira/browse/LANG-617?attachmentSortBy=fileName" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://issues.apache.org/jira/browse/LANG-617?attachmentSortBy=fileName</a>).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">As an example, we had a user put a dolphin emoji (U+1F42C) in their display name. This was escaped by StringEscapeUtils.escapeXml to �� which is incorrect - these are both invalid Unicode characters when unescaped. (These map to 0xd83d, 0xdc2c - the byte-pairs that make up the UTF-16 representation of the original character).<br> <br> This was fixed in the the differently-API'd version 3 of this library, org.apache.commons.lang3.StringEscapeUtils, but this is since deprecated, and should seemingly be replaced by org.apache.commons.text.StringEscapeUtils (which depends on org.apache.commons.lang3 anyway). This version fixes it just by not escaping the character at all - as it doesn't really need to with XML, assuming the encoding is set correctly.<br> <br> This doesn't seem to affect SAML responses in the same way - presumably as the XML is generated differently - whereas the CAS serviceValidate success response is generated by a Velocity template calling out to $escapeUtils.escapeXml. As an aside, the aacli.sh tool correctly outputs the correct value, for example:</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><saml2:AttributeValue>Shibboleth Test 🐬</saml2:AttributeValue><br> </p> </td>
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