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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://shibboleth.atlassian.net/browse/IDP?atlOrigin=eyJpIjoiM2YxYjUzNTM4NTI0NDc0OWFmM2Q2YzliZTkzY2MzNmYiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Identity Provider</a> / <a href="https://shibboleth.atlassian.net/browse/IDP-1924?atlOrigin=eyJpIjoiM2YxYjUzNTM4NTI0NDc0OWFmM2Q2YzliZTkzY2MzNmYiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-c9e8b6c9-5652-4b1b-aa5a-5c5f0cd6a2d6" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://shibboleth.atlassian.net/browse/IDP-1924?atlOrigin=eyJpIjoiM2YxYjUzNTM4NTI0NDc0OWFmM2Q2YzliZTkzY2MzNmYiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">IDP-1924</a> </td>
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<td style="vertical-align: top;; padding: 0; 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://shibboleth.atlassian.net/browse/IDP-1924?atlOrigin=eyJpIjoiM2YxYjUzNTM4NTI0NDc0OWFmM2Q2YzliZTkzY2MzNmYiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">SSO Session reuse strategy</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: 0; 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-c9e8b6c9-5652-4b1b-aa5a-5c5f0cd6a2d6" 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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 4.1.5 </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="557058:5b78efc9-1379-42cc-a3f6-56c6ea3a0007" style="color:#3b73af;; color: #3b73af; text-decoration: none" id="email_557058:5b78efc9-1379-42cc-a3f6-56c6ea3a0007" href="https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A5b78efc9-1379-42cc-a3f6-56c6ea3a0007"> Scott Cantor </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Session </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 25/Mar/22 3:50 AM </td>
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<td class="has-icon" style="padding: 0; 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-trivial-ae0cc8d7-6dac-447c-8fc0-dc980015aa72" height="16" width="16" border="0" align="absmiddle" alt="Trivial" style="vertical-align: text-bottom"> Trivial </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="557058:60a84ee1-4961-471b-99d8-f67c05e24403" style="color:#3b73af;; color: #3b73af; text-decoration: none" id="email_557058:60a84ee1-4961-471b-99d8-f67c05e24403" href="https://shibboleth.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A60a84ee1-4961-471b-99d8-f67c05e24403"> Simone Avogadro </a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">After the tests which followed raising <a href="https://shibboleth.atlassian.net/browse/JOIDC-84" title="smart-link" class="external-link" rel="nofollow noreferrer" style="color: #3b73af; text-decoration: none">https://shibboleth.atlassian.net/browse/JOIDC-84</a> we had some internal discussion on the best approach around how to deal with scenarios where the AuthContextClassRef is used to map LOAs (Levels Of Assurance)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This scenario is particularry relevant since SAML2 (and now OIDC) in EU are used as foundation of the eIDAS authentication standards and in both cases the LOAs are mapped to AuthContextClassRef. So reusing an existing authentication from LOA1 to give accesso to LOA2+ SPs cannot be allowed.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The current solution is simply to disable Shibboleth SSO and thus completely reimplement it manually (which is less then trivial).</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">We’re here raising awareness on this potential use-case and proposing what seems a simple solution.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">We propose to introduce a configurable (bean) which will be in charge to decide is the user needs to re-authenticate or if the authentication from the current session can be re-used.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The semantics would be:</p>
<ul>
<li>the bean has access to Session information (at least AuthContextClassRef) and AuthnRequestContext information</li>
<li>the bean returns true only if the current session can be re-used to satisfy the incoing request</li>
<li>if the bean returns false the current session will be discarded and the user will be re-authenticated to create a new one (this is needed to correctly address SSO in scenarios where the first login uses LOA1 but all the following one use LOA2)</li>
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