Re: [plasma] Clarification of specifying WS-Trust tokens in the PLASMA authentication element

"Jim Schaad" <jimsch@nwlink.com> Mon, 05 November 2012 15:17 UTC

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From: "Jim Schaad" <jimsch@nwlink.com>
To: "'Ed Simon'" <Ed.Simon@titus.com>, <plasma@ietf.org>
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Date: Mon, 5 Nov 2012 10:17:00 -0500
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Subject: Re: [plasma] Clarification of specifying WS-Trust tokens in the PLASMA authentication element
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Sorry for the delay on getting back, we have been really busy at the winery
for the last couple of weeks.

We have a choice between using our own name and referencing the type or
reusing the same name and type from the WS Trust specification.  Which is
chosen is going to be just a question of style and a question of what that
referenced specification looks as being a top level element.

However in this case, there are differences between what is specified in
this document and what is specified for wst:RequestedSecurityToken,
specifically the addition of the tokenType parameter.  We could
alternatively defined this as 

<eps:WSToken>
  <wst:RequestedSecurityToken/>
  <wst:TokenType>
</eps:WSToken>

I would not object to doing the change to the latter structure, but it is
not a direct mapping currently.

Jim


> -----Original Message-----
> From: plasma-bounces@ietf.org [mailto:plasma-bounces@ietf.org] On
> Behalf Of Ed Simon
> Sent: Wednesday, October 24, 2012 4:05 PM
> To: plasma@ietf.org
> Subject: [plasma] Clarification of specifying WS-Trust tokens in the
PLASMA
> authentication element
> 
> The "Plasma Service Trust Processing" document includes a fragment of an
> XML Schema describing the <eps:Authentication> element as such:
> 
>      <xs:element name="Authentication" type="eps:AuthenticationType"/>
>      <xs:complexType name="AuthenticationType">
>        <xs:choice maxOccurs="unbounded">
>          <xs:element ref="saml:Assertion"/> ..
>          <xs:element name="WS-Token">
>            <xs:complexType>
>              <xs:simpleContent>
>                <xs:extension base="xs:hexBinary">
>                  <xs:attribute name="tokenType" type="xs:anyURI"/>
>                </xs:extension>
>              </xs:simpleContent>
>            </xs:complexType>
>          </xs:element>
> ..
> 
> I presume, based on the text of the "Plasma Service Trust Processing"
> document, that the "WS-Token" is actually supposed to be the
> 
> /wst:RequestSecurityTokenResponse/wst:RequestedSecurityToken
> 
> described in <http://docs.oasis-open.org/ws-sx/ws-trust/v1.4/errata01/ws-
> trust-1.4-errata01-complete.html>. Correct? If so, the XML Schema in the
> "Plasma Service Trust Processing" document needs to be adjusted to
> something like <xs:element ref="wst:RequestedSecurityToken">. Also, with
> respect to the "XML Nomenclature and Name Spaces" table, should we be
> not be using this namespace
> 
> http://docs.oasis-open.org/ws-sx/ws-trust/200802
> 
> for WS-Trust 1.4?
> 
> Ed
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