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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060">I’m sympathetic to removing it but I’d like to first understand, if possible, why we included the constraint in the first place. (Thomas may be right that it
was copied from the front-channel logout spec, but there may still have been reasons for doing so.) John? Anyone else?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#002060"> -- Mike<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> Torsten Lodderstedt [mailto:torsten@lodderstedt.net]
<br>
<b>Sent:</b> Friday, August 26, 2016 2:58 AM<br>
<b>To:</b> Thomas Broyer <t.broyer@ltgt.net>; Mike Jones <Michael.Jones@microsoft.com>; openid-specs-ab@lists.openid.net<br>
<b>Subject:</b> Re: [Openid-specs-ab] Session ID semantics aligned across OpenID Connect front-channel and back-channel logout specs<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I suggest to remove this constraint from the spec.<o:p></o:p></p>
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<p class="MsoNormal">Am 25.08.2016 um 16:30 schrieb Thomas Broyer:<o:p></o:p></p>
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<p class="MsoNormal">May I suggest a copy-pasta from the frontchannel spec? (where it makes sense to follow the Web Origin restrictions, in case the frontchannel_logout_uri uses localStorage/sessionStorage or similar; and it's stricter than "cookie domains"
so it works for cookies too). <o:p></o:p></p>
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<p class="MsoNormal">BTW, that makes for a good reminder of why a spec should explain the "why" of its constraints, and not just "do this", "don't do that".<o:p></o:p></p>
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<p class="MsoNormal">On Thu, Aug 25, 2016 at 3:43 PM Mike Jones via Openid-specs-ab <<a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#002060">John, do you remember the rationale for the URL restrictions? I know that we talked about this as the spec was being written ~1.5 years ago but I don’t
remember the reasons off the top of my head.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#002060"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#002060"> -- Mike</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a name="m_8880273005057838509__MailEndCompose"><span style="color:#002060"> </span></a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="color:windowtext">From:</span></b><span style="color:windowtext"> Torsten Lodderstedt [mailto:<a href="mailto:torsten@lodderstedt.net" target="_blank">torsten@lodderstedt.net</a>]
<br>
<b>Sent:</b> Thursday, August 25, 2016 4:56 AM<br>
<b>To:</b> Mike Jones <<a href="mailto:Michael.Jones@microsoft.com">Michael.Jones@microsoft.com</a>>;
<a href="mailto:openid-specs-ab@lists.openid.net" target="_blank">openid-specs-ab@lists.openid.net</a><br>
<b>Subject:</b> Re: [Openid-specs-ab] Session ID semantics aligned across OpenID Connect front-channel and back-channel logout specs</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Hi Mike,<br>
<br>
section 2.2 states "The domain, port, and scheme of this URL MUST be the same as that of a registered Redirection URI value."<br>
<br>
What's the rational for limiting the logout URL that way?<br>
<br>
best regards,<br>
Torsten.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Am 24.08.2016 um 03:44 schrieb Mike Jones via Openid-specs-ab:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Session ID definitions in the OpenID Connect front-channel and back-channel logout specs have been aligned so that the Session ID definition is now the same in both specs. The
Session ID is scoped to the Issuer in both specs now (whereas it was previously global in scope in the front-channel spec). This means that the issuer value now needs to be supplied whenever the Session ID is. This doesn’t change the simple (no-parameter)
front-channel logout messages. The back-channel specification is now also aligned with the ID Event Token specification.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The new specification versions are:<o:p></o:p></p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt"> </span>
<a href="http://openid.net/specs/openid-connect-frontchannel-1_0-01.html" target="_blank">http://openid.net/specs/openid-connect-frontchannel-1_0-01.html</a><o:p></o:p></p>
<p><span style="font-family:Symbol">·</span><span style="font-size:7.0pt"> </span>
<a href="http://openid.net/specs/openid-connect-backchannel-1_0-03.html" target="_blank">http://openid.net/specs/openid-connect-backchannel-1_0-03.html</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> -- Mike<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">P.S. This notice was also posted at
<a href="http://self-issued.info/?p=1599" target="_blank">http://self-issued.info/?p=1599</a> and as
<a href="https://twitter.com/selfissued" target="_blank">@selfissued</a>.<o:p></o:p></p>
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<br>
</span><o:p></o:p></p>
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