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<p class=MsoNormal>Has anyone thought about how SAML [Security Assertion Markup
Language] would work in terms of SASL <<a
href="http://en.wikipedia.org/wiki/Saml">http://en.wikipedia.org/wiki/Saml</a>>
and XMPP? This is especially interesting regarding the whole OpenID/SSO
discussion a while back; SAML isn’t bound to HTTP or any other client for
that matter (don’t get the wrong idea from the abundance of HTTP
documentation – it will work in any transport).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have been reading a bit about SAML and it looks like they
do B64 the SAML XML, with no explanation. It seems a bit strange to B64 an XML
fragment in a SOAP document (or an XMPP stream for that matter) – maybe it
has to do with the WS-Security schema.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>As far as XMPP 1.0 goes we probably would have to B64 the
fragment; but here are my initial thoughts on XMPP 2.0:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Possibly:<br>
<mechanism type="http://www.w3.org/XML/1998/namespace">SAML</mechanism><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Which gives raise to:<o:p></o:p></p>
<p class=MsoNormal><mechanism type="urn:xmpp:tmp:text-plain">PATHETIC</mechanism><!--
something like [name];[password] --><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>And implicitly:<o:p></o:p></p>
<p class=MsoNormal><mechanism type="urn:xmpp:tmp:base64">DIGEST-MD5</mechanism><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Indeed, we could go as far as to turn it into a feature on
its own. It does support SASL-like mechanism selection itself; it should be
possible to jippo SASL right in there:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><stream:features><o:p></o:p></p>
<p class=MsoNormal> <mechanisms
xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><o:p></o:p></p>
<p class=MsoNormal>
<mechanism>DIGEST-MD5</mechanism><o:p></o:p></p>
<p class=MsoNormal>
<mechanism>PLAIN</mechanism><o:p></o:p></p>
<p class=MsoNormal>
<mechanism>EXTERNAL</mechanism><o:p></o:p></p>
<p class=MsoNormal> </mechanisms><o:p></o:p></p>
<p class=MsoNormal> <saml xmlns='http://the/saml/namespace'/><o:p></o:p></p>
<p class=MsoNormal></stream:features><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>-- Jonathan<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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