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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/EDS" style="color: #3b73af; text-decoration: none">Embedded Discovery Service</a> / <a href="https://issues.shibboleth.net/jira/browse/EDS-85" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-38bea351-d71e-4304-a8a9-7b8cd979a786" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://issues.shibboleth.net/jira/browse/EDS-85" style="color: #3b73af; text-decoration: none">EDS-85</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/EDS-85" style="color: #3b73af; text-decoration: none">Identify IDP from Scopes and DomainHints</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-38bea351-d71e-4304-a8a9-7b8cd979a786" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"> Improvement </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="rdw@iay.org.uk" id="email_rdw@iay.org.uk" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=rdw%40iay.org.uk" style="color:#0052cc;; color: #3b73af; text-decoration: none">Rod Widdowson</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">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 27/Sep/19 9:43 AM </td>
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<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-4a76542e-edf2-4dab-9e61-483045e02e42" height="16" width="16" border="0" align="absmiddle" alt="Minor" style="vertical-align: text-bottom"> Minor </td>
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<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="peter@aco.net" id="email_peter@aco.net" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=peter%40aco.net" style="color:#0052cc;; color: #3b73af; text-decoration: none">Peter Schober</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">Besides an IDP's name the EDS currently supports finding an IDP based on:</p>
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<li>the <tt>entityID</tt></li>
<li>any <tt>mdui:Keywords</tt> (assuming language is detected correctly, which it often isn't due to <a href="https://issues.shibboleth.net/jira/browse/EDS-72" title="Content negotiation in Chromium/Chrome" class="issue-link" data-issue-key="EDS-72" style="color: #3b73af; text-decoration: none">EDS-72</a>)</li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It would be helpful if additional data would be considered, too, specifically:</p>
<ul>
<li><tt>shibmd:Scope</tt></li>
<li><tt>mdui:DomainHints</tt></li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The former (Scopes) is pretty much universally deployed, at least in the academic sector, and Scopes are usually carefully vetted so worth relying on. Scopes will also often match (additional) DNS domains also used for e.g. SMTP and could therefore help finding the IDP where email addresses are being used as identifiers (at least where only the domain part is entered; though ignoring the localpart may be a possible follow-up improvement).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><tt>mdui:DomainHints</tt> aren't often found in the wild (outside eduID.at, at least) but seem a natural extension of that same argument: (Additional) DNS names that are mapped to an IDP.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Both suggested elements are lacking an <tt>xml:lang</tt> XML attribute in SAML Metadata (which means we can't easily stuff the additional data into the existing <tt>Keywords</tt> JSON, as that has a <tt>lang</tt> property) but other than making implemenation less trivial just means the additional data should be consulted unconditionally/irrespective of browser language settings.</p> </td>
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