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<p class="MsoNormal"><span style="color:#98AFF3">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">I’m writing from the City University of New York. We’re attempting to enable SAML2 SSO with
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">a vendor who would configure a service provider instance for each of our 26 campuses—except
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">for one problem that I have never encountered in my years of configuring Shibboleth.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">Their system will not accept the same IDP entity ID for two or more SPs. We have one SP instance
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">configured in their system (and in ours as a relying party) with our IDP metadata (we’re running IDP 4.0.1).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">This integration works as expected. When they attempt to configure a new SP instance, their system
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">generates the error message, “Duplicate IDP Entity ID. Another IDP profile has the same Entity ID.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">Am I correct that this constraint on IDP and SP entityIDs is nonstandard?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">In case I have made an unwarranted assumption about their system, the SAML2 specification or both, is there
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">a way to generate separate metadata for the same IDP with different entityIDs? One of their customers
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">(another university) provided the vendor with IDP metadata of the form entityID=constantURL?variableID=theID.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">The ACS etc endpoints in their metadata also contained the additional argument. I do not know if this customer stood
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">up separate IDPs.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">I feel as though I ought to apologize for this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3">Florian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#98AFF3"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><img width="176" height="96" style="width:1.8333in;height:1.0in" id="Picture_x0020_3" src="cid:image002.png@01D9153B.1B2CB9B0"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#00B0F0">Florian Lengyel, PhD<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#00B0F0">Identity and Access Management<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#00B0F0">CUNY CIS 395 Hudson Street, New York, NY 10014<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#00B0F0">Voicemail: (646) 664-2370 Cell: (917) 621-7845<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#00B0F0">Email: florian.lengyel@cuny.edu<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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