Hi Valerio Valerio Venturi wrote:
On Mon, 2008-01-21 at 14:48 +0000, David Chadwick wrote:
Hi Valerio
concerning the VO attribute I am not strongly for or against either approach, so I will sit on the fence on this one. (But I am strongly in favour of choosing one of them).
I agree, we'll choose one.
Concerning the role attribute, I would strongly prefer the friendly name to be VOMSrole rather than role, since the syntax and semantics are VOMS specific creations. Role is already a standard attribute in X.509 and is a different syntax to your syntax. In PERMIS, we have defined the PermisRole attribute which does not have the same syntax as yours or X.509 (ours is just a string, any old string) and since it is different from the role attribute which is standardised in X.509 we did not call it simply role.
Ok for the name. But what about the syntax? Do you like the @ for scoping?
Its your call. To my mind this is a VOMS specific issue and not a grid generic issue. We have not had a reason or user requirement to do this in PERMIS. regards David
Valerio
regards
David
Valerio Venturi wrote:
Hi, I'll try to checkpoint the discussion had so far.
As Krzysztof is planning to serve more than one VO with the same service, we cannot have a one to one relationship between entityIDs and VOs, this imply the need of having a VO attribute. Which was also more or less David's concern, an authority being able to assert whatever it wants. If we go wiht this, the VO attribute stays. We have two proposal so far. Tom suggested to use the MACE-Dir eduPersonScopedAffiliation attribute
<saml:Attribute xmlns:xacmlprof="urn:oasis:names:tc:SAML:2.0:profiles:attribute:XACML" xmlns:ldapprof="urn:oasis:names:tc:SAML:2.0:profiles:attribute:LDAP" xacmlprof:DataType="http://www.w3.org/2001/XMLSchema#string" ldapprof:Encoding="LDAP" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri" Name="urn:oid:1.3.6.1.4.1.5923.1.1.1.9" FriendlyName="eduPersonScopedAffiliation"> <saml:AttributeValue xsi:type="xs:string">member@voName </saml:AttributeValue> </saml:Attribute>
while in our first draft Krzysztof and I suggested the use of a specific
<saml:Attribute xmlns:xacmlprof="urn:oasis:names:tc:SAML:2.0:profiles:attribute:XACML" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri" Name="uri_to_define" FriendlyName="vo" xacmlprof:DataType="http://www.w3.org/2001/XMLSchema#string"> <saml:AttributeValue xsi:type="xsd:string"> voName </saml:AttributeValue> </saml:Attribute>
Let's try to agree on one.
There were concerns about Tom's proposal to use Grouper to express groups, specifically about the contents being an URN. Anyway, the specification doesn't mandate them to be URN, it recommends to use URIs is uniqueness is to eb achieved.
Other concerns with using this?
Still we have no suggestions for expressing roles, apart from the initial (but I have made the group syntax homogeneous with the above)
<saml:Attribute xmlns:xacmlprof="urn:oasis:names:tc:SAML:2.0:profiles:attribute:XACML" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:uri" Name="uri_to_define" FriendlyName="role" xacmlprof:DataType="http://www.w3.org/2001/XMLSchema#string"> <saml:AttributeValue xsi:type="xsd:string"> VO-Admin@vo </saml:AttributeValue> <saml:AttributeValue xsi:type="xsd:string"> SoftwareManager@vo:group:subgroup </saml:AttributeValue> </saml:Attribute>
that seems to receive more favor than the one with the scope attributes.
What problems can you see with that?
Valerio
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***************************************************************** David W. Chadwick, BSc PhD Professor of Information Systems Security The Computing Laboratory, University of Kent, Canterbury, CT2 7NF Skype Name: davidwchadwick Tel: +44 1227 82 3221 Fax +44 1227 762 811 Mobile: +44 77 96 44 7184 Email: D.W.Chadwick@kent.ac.uk Home Page: http://www.cs.kent.ac.uk/people/staff/dwc8/index.html Research Web site: http://www.cs.kent.ac.uk/research/groups/iss/index.html Entrust key validation string: MLJ9-DU5T-HV8J PGP Key ID is 0xBC238DE5
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-- ***************************************************************** David W. Chadwick, BSc PhD Professor of Information Systems Security The Computing Laboratory, University of Kent, Canterbury, CT2 7NF Skype Name: davidwchadwick Tel: +44 1227 82 3221 Fax +44 1227 762 811 Mobile: +44 77 96 44 7184 Email: D.W.Chadwick@kent.ac.uk Home Page: http://www.cs.kent.ac.uk/people/staff/dwc8/index.html Research Web site: http://www.cs.kent.ac.uk/research/groups/iss/index.html Entrust key validation string: MLJ9-DU5T-HV8J PGP Key ID is 0xBC238DE5 *****************************************************************