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<p class="MsoNormal">In his review of Registration, George wrote the following about
<a href="http://openid.net/specs/openid-connect-registration-1_0-20.html#SectorIdentifierValidation">
http://openid.net/specs/openid-connect-registration-1_0-20.html#SectorIdentifierValidation</a>:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">It seems like there is some pretty complicated OP logic required to process the sector_identifier_uri.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">Given that the the list of allowed redirect_uris in the JSON file can change at any time! the OP would<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">need to pull the file and verify that the current client redirect_uri is still present in the list. That is too much<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">over head to do at token issuance. Should we have some guidance that redirect_uris can be added to the<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">sector_identifier_uri file but SHOULD NOT be removed. Removing a redirect_uri from the file results in<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in;text-autospace:none"><span style="font-family:"Helvetica","sans-serif"">undefined behavior? With this guidance the OP can do all the necessary checking at client registration<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Helvetica","sans-serif"">time which seems reasonable.</span><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It’s always been my assumption that the sector_identifier_uri is validated once at registration time and never fetched again.  If people agree, I think we should say that.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">                                                                -- Mike<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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