[Openid-specs-ab] Session ID semantics aligned across OpenID Connect front-channel and back-channel logout specs

[Torsten Lodderstedt]

I suggest to remove this constraint from the spec.

Am 25.08.2016 um 16:30 schrieb Thomas Broyer:
> 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).
>
> 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".
>
> On Thu, Aug 25, 2016 at 3:43 PM Mike Jones via Openid-specs-ab 
> <openid-specs-ab at lists.openid.net 
> <mailto:openid-specs-ab at lists.openid.net>> wrote:
>
>     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.
>
>     -- Mike
>
>     *From:*Torsten Lodderstedt [mailto:torsten at lodderstedt.net
>     <mailto:torsten at lodderstedt.net>]
>     *Sent:* Thursday, August 25, 2016 4:56 AM
>     *To:* Mike Jones <Michael.Jones at microsoft.com
>     <mailto:Michael.Jones at microsoft.com>>;
>     openid-specs-ab at lists.openid.net
>     <mailto:openid-specs-ab at lists.openid.net>
>     *Subject:* Re: [Openid-specs-ab] Session ID semantics aligned
>     across OpenID Connect front-channel and back-channel logout specs
>
>     Hi Mike,
>
>     section 2.2 states "The domain, port, and scheme of this URL MUST
>     be the same as that of a registered Redirection URI value."
>
>     What's the rational for limiting the logout URL that way?
>
>     best regards,
>     Torsten.
>
>     Am 24.08.2016 um 03:44 schrieb Mike Jones via Openid-specs-ab:
>
>         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.
>
>         The new specification versions are:
>
>         ·http://openid.net/specs/openid-connect-frontchannel-1_0-01.html
>
>         ·http://openid.net/specs/openid-connect-backchannel-1_0-03.html
>
>         -- Mike
>
>         P.S.  This notice was also posted at
>         http://self-issued.info/?p=1599
>         <http://self-issued.info/?p=1599> and as @selfissued
>         <https://twitter.com/selfissued>.
>
>
>
>
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