RE: [higgins-dev] How specify the authentication method in the Relying P

["Leonardo Straniero" <leonardo.straniero@xxxxxxxxxxxx>]

Hi Chris,
thanks for the explanation and prompt reply.
Could you please clarify me how can I manage a situation such the following one.
Suppose that the RP needs to dynamically change the type of authentication a user has to do (e.g. from username/PWD or X509certificate to X509 certificate only) against the IdP.
My idea was to simply have different RP policies one for "weak authentication" and another one for the strong case. These policies, in my humble opinion, just had to have a statement whose value is different like the ones I exemplified in my previous posting.
So I was figuring to be able to restrict access to the RP in certain situation to only users having X509 certificates cards.

You said the RP has no way to do this, right? Or can  I add some "required claims" in the RP "strong authentication" policy that makes possible to force the IdP (or CardSpace) to only accepts users with X509 certificate cards?

Thanks in advance.
	Leonardo.

-----Original Message-----
From: Christopher Taylor [mailto:christopher.taylor@xxxxxxxxxxxxxxxxxxx] 
Sent: martedì 12 maggio 2009 15.17
To: leonardo.straniero@xxxxxxxxxxxx; Higgins (Trust Framework) Project developer discussions
Subject: Re: [higgins-dev] How specify the authentication method in the Relying Party Security Policy

Leonardo,

AFAIK you can't specify the authentication method as part of the RP 
policy. The reasoning behind this is that the RP has a trust 
relationship with the STS and trusts the method that the STS uses to be 
"good enough". This also makes sense because the RP would have no way to 
check if the STS actually used a specific method or just claims it did.

Of course the STS could support a set of (non-standard) claims that 
assert that a certain method was used, which the RP could then require 
in its policy.

hth,
  --Chris

Leonardo Straniero schrieb:
>
> Hi All,
>
> I am trying to understand how to specify in the Relying Party Security 
> Policy the authentication method (e.g. username/pwd, X509 certificate, 
> …) a user has to use to authenticate to the IP/STS when requesting 
> security tokens.
>
>  
>
> I think it is necessary to insert another parameter into the RP’s 
> *web.xml* file.
>
>  
>
> I saw in a security policy example a field “*Issuer*” as follows:
>
>
>
> *  <param-name>Issuer</param-name>*
>
> *  <param-value>shib2.internet2.edu</param-value>*
>
>  
>
> I know the Higgins STS provides some endpoints:
>
> * *
>
> *…./services/MetadataX509Token*                          (X509 
> Authentication)
>
> *…/services/MetadataUsernameToken                *(UsernamePassword 
> Authentication)
>
>  
>
> and so on.
>
>  
>
> Is it possible to insert another parameter (for example a 
> MetadataReference parameter that identifies the STST endpoint to be 
> used) to specify the authentication method? Do you know if, adding a 
> parameter like this, CardSpace will properly manage it and select only 
> the cards that meet the required authentication method?
>
>  
>
> Any ideas?
>
> Thanks in advance.
>
>  
>
> Best Regards.
>
> * *
>
> *============================*
>
> *Dr. Leonardo Straniero*
>
> CRS - Corporate Research
>
> TXT e-Solutions SpA
>
> c/o Tecnopolis N.O.
>
> Strada Prov. per Casamassima Km 3
>
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>
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