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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">And when I said eduPersonEntitlement, I actually meant eduPersonScopedAffiliation.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">On 12/21/22, 2:12 PM, "users" <users-bounces@shibboleth.net> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">As a service provider, I can say that we have definitely engineered our SP to accommodate multiple institutions using the same EntityID.
We obviously require a different attribute, most typically eduPersonEntitlement, to distinguish between those institutions.
</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Spencer Thomas<br>
</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Technical Architect </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="https://www.ithaka.org/"><span style="color:#0563C1">ITHAKA</span></a> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">301 E. Liberty St, Suite 250, Ann Arbor, MI 48104<br>
Email: <a href="mailto:Spencer.Thomas@ithaka.org"><span style="color:#0563C1">Spencer.Thomas@ithaka.org</span></a></span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Voicemail: +1-734-887-7004</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="https://www.ithaka.org/"><span style="color:#0563C1">ithaka.org</span></a> </span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">On 12/21/22, 1:32 PM, "users" <users-bounces@shibboleth.net> wrote:</span><o:p></o:p></p>
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<p class="MsoNormal"><strong><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:red">Caution</span></strong><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:red">: This message did not originate from within ITHAKA's email
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<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><img border="0" width="50" height="50" style="width:.5208in;height:.5208in" id="_x0000_i1026" src="cid:image001.gif@01D9153B.1B2CB9B0"></span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">Hi,</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">I’m writing from the City University of New York. We’re attempting to enable SAML2 SSO with
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">a vendor who would configure a service provider instance for each of our 26 campuses—except
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">for one problem that I have never encountered in my years of configuring Shibboleth.
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">Their system will not accept the same IDP entity ID for two or more SPs. We have one SP instance
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">configured in their system (and in ours as a relying party) with our IDP metadata (we’re running IDP 4.0.1).
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">This integration works as expected. When they attempt to configure a new SP instance, their system
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">generates the error message, “Duplicate IDP Entity ID. Another IDP profile has the same Entity ID.”</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">Am I correct that this constraint on IDP and SP entityIDs is nonstandard?</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">In case I have made an unwarranted assumption about their system, the SAML2 specification or both, is there
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">a way to generate separate metadata for the same IDP with different entityIDs? One of their customers
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">(another university) provided the vendor with IDP metadata of the form entityID=constantURL?variableID=theID.
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">The ACS etc endpoints in their metadata also contained the additional argument. I do not know if this customer stood
</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">up separate IDPs.</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">I feel as though I ought to apologize for this.</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">Sincerely,</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3">Florian</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt;color:#98AFF3"> </span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><img border="0" width="176" height="96" style="width:1.8333in;height:1.0in" id="Picture_x0020_3" src="cid:image002.png@01D9153B.1B2CB9B0"></span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:9.0pt;color:#00B0F0">Florian Lengyel, PhD</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:9.0pt;color:#00B0F0">Identity and Access Management</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:9.0pt;color:#00B0F0">CUNY CIS 395 Hudson Street, New York, NY 10014</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:9.0pt;color:#00B0F0">Voicemail: (646) 664-2370 Cell: (917) 621-7845</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:9.0pt;color:#00B0F0">Email: florian.lengyel@cuny.edu</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in"><span style="font-size:12.0pt"> </span><o:p></o:p></p>
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