SLODemo

Preparing

• Metadata (unsigned)
• IdP: Based on Adam's Git repository

Service Providers

SP1: (Not-so) Old Release

SP software	Shibboleth 2.1 (Debian)
Front channel logout	supported
Back channel logout	not working
Notes	Back-channel logout returns 'Partial logout' due to a bug

SP2: Bright Shining Star

SP software	Shibboleth 2.2+ source build
Front channel logout	supported
Back channel logout	supported
Notes	Both front- and back-channel logout should work properly

SP3: The Pretender

SP software	SimpleSAMLphp SAML2 SP
Front channel logout	supported
Back channel logout	not supported
Notes	SimpleSAMLphp does not support back-channel bindings, therefore the metadata does not contain it

SP4: Use The Backdoor, Please!

SP software	Shibboleth 2.2+ source build
Front channel logout	not supported
Back channel logout	supported
Notes	The metadata of this SP does not contain front-channel bindings for logout

SP5: Old Slowhand

SP software	Shibboleth 2.1 (Debian)
Front channel logout	not working (times out)
Back channel logout	not working (times out)
Notes	Metadata points to a fake logout service that is not answering in time

SP6: Shibboleth Neanderthalensis

SP software	Shib 1.3 (IRL: Shibboleth 2.1)
Front channel logout	not supported
Back channel logout	not supported
Notes	The metadata of this SP does not contain any logout services, just like a normal Shib1.3 SP

SP7: Good Guy Speaking Ancient Greek

SP software	Shibboleth 2.2+ (Debian)
Front channel logout	supported
Back channel logout	supported
Notes	This is a 2.x SP but it uses Shibboleth 1.3 SSO protocol. I'd expected a logout failure because of the Shibboleth-specific NameID format, however it turned out working.

SP8: Blitzkrieg

SP software	Shibboleth 2.2+ (source)
Front channel logout	not working (if timed out)
Back channel logout	not working (if timed out)
Notes	This is a special SP that has a very short session lifetime (30 sec). If you hit the logout button within 30 sec, it should work but it should fail afterwards, because the principal is no longer known to the SP.

Expected results

SAML2

Single Logout profile is for SAML2 only. Therefore SP6 (Neanderthalensis) and SP7 (Ancient Greek) will always fail.

The same applies for SP5 (Old Slowhand) if the Logout request is not initiated by it.

Front-channel, back-channel

The IdP can fallback to back-channel, if the logout is front-channel and the SP software does support only back-channel bindings. Not the other way, because front-channel bindings need the information held in browser cookies.