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Subject: 2.0 Work Item List, v1.40
An updated XACML 2.0 Work Item Index is attached. I believe the STATUS line of each item reflects the current status with respect to XACML 2.0, including recommendations made at the 12 Feb 2004 TC meeting. Please let me know if any corrections are needed. I have not had time to pull out the items still open for discussion. You will have to prepare those for the 19 Feb meeting agenda yourselves! Have fun, Anne -- Anne H. Anderson Email: Anne.Anderson@Sun.COM Sun Microsystems Laboratories 1 Network Drive,UBUR02-311 Tel: 781/442-0928 Burlington, MA 01803-0902 USA Fax: 781/442-1692
Title: XACML 2.0 Work Items Version: 1.40 Updated: 04/02/13 (yy/mm/dd) TEMPLATE FOR PROPOSALS: http://lists.oasis-open.org/archives/xacml/200308/msg00028.html CURRENT 2.0 DRAFT: http://www.oasis-open.org/apps/org/workgroup/xacml/download.php/5127/oasis-xacml-2_0-wd-05.zip THIS WORK ITEM INDEX INCLUDES E-MAILS UP THROUGH: http://lists.oasis-open.org/archives/xacml/200402/msg00068.html and reflects decisions taken at XACML FG meeting 12 Feb 2004. WI#1. Grid Requirements Any XACML changes needed to satisfy Grid requirements TYPE: New functionality STATUS: Abstract. Related: #2,3,4,16,17,29,30,31,32,33,34,35,36,37 PROPOSAL: Abstract CHAMPION: Frank Siebenlist WI#2. Location Information Way to pass information needed to configure a PDP and its context and policy handlers/finders in order to evaluate a policy. Examples of such information are: o where to find various Attributes, and what they are keyed off o where Attribute Authorities to be used are located o where to find function, combining algorithm, data-type, Attribute parsing code Such information might be embedded in a. an XACML Request b. an XACML policy c. a third document type TYPE: New functionality. Could be separate profile if #11 accepted. STATUS: Open issues. Waiting for revised proposal from Seth. Related: #1,24. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00022.html CHAMPION: Seth Proctor WI#3. Multiple Actions per Request Support Requests containing multiple Actions. Response could either say "All permitted/denied" or could include a separate decision for each. TYPE: New functionality STATUS: Closed for 2.0: no proposal submitted by 20 Oct 2003. Related: #1. PROPOSAL: CHAMPION: Frank Siebenlist WI#4. Multiple Resources per Request Support Requests containing multiple Resources. Response could either say "All permitted/denied" or could include a separate decision for each. TYPE: New functionality STATUS: Closed for 2.0: no proposal submitted by 20 Oct 2003. Related: #1. PROPOSAL: CHAMPION: Frank Siebenlist WI#5. Privacy Requirements Any XACML changes needed to satisfy Privacy requirements. TYPE: New functionality STATUS: Closed for XACML 2.0. Abstract. Related: <none> PROPOSAL: ABSTRACT CHAMPION: ? WI#6. Domain-specific identifiers Define a set of domain-specific identifiers based on application usage of XACML. TYPE: New functionality STATUS: Closed for 2.0: no proposal submitted by 20 Oct 2003. PROPOSAL: CHAMPION: Michiharu Kudo WI#7. ConditionReference Allow a Rule to contain a ConditionReference element as an alternative to a Condition element. The ConditionReference would identify a Condition element specified elsewhere. This allows a single Condition to be re-used in Rules under different Targets. An optional ConditionId attribute would be added to the Condition element to support this. TYPE: Simplicity of policy construction. STATUS: Close to resolution. This will go into Draft 6. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200304/msg00039.html [use cases] http://lists.oasis-open.org/archives/xacml/200402/msg00050.html [Simon-schema] http://lists.oasis-open.org/archives/xacml/200402/msg00054.html [Polar agrees] http://lists.oasis-open.org/archives/xacml/200402/msg00055.html [Daniel/Polar] http://lists.oasis-open.org/archives/xacml/200402/msg00056.html [Polar-text] CHAMPION: Michiharu Kudo WI#8. RuleIdReference Define RuleIdReference analogous to PolicyIdReference and PolicySetIdReference. TYPE: Simplicity of policy construction STATUS: Closed for 2.0 20 Oct 2003. Can do this now with a Policy containing a single Rule. Related #19. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200305/msg00004.html CHAMPION: Anne Anderson (on behalf of ebXML) WI#9. Policies referring to hierarchical resources How to express policies that apply to a hierarchy of resources. E.g. "Frank can read any file under directory /X/Y". TYPE: New functionality STATUS: CURRENT proposal below accepted for 2.0 8 Jan 2004. See ISSUE below. PROPOSALS: OLD: http://lists.oasis-open.org/archives/xacml/200304/msg00057.html OLD: http://lists.oasis-open.org/archives/xacml/200305/msg00009.html CURRENT: http://lists.oasis-open.org/archives/xacml/200310/msg00078.html http://lists.oasis-open.org/archives/xacml/200312/msg00050.html [need std hier. schema] http://lists.oasis-open.org/archives/xacml/200312/msg00059.html [Anne to Rob Grzywinski] http://lists.oasis-open.org/archives/xacml/200401/msg00070.html [Bob Daly] http://lists.oasis-open.org/archives/xacml/200402/msg00000.html [Bill to Bob] CHAMPION: Simon Godik OPEN ISSUE: how to handle cases like "read" in a file system requiring "execute" permission on all elements higher in the hierarchy. WI#10. Parameters for Combining Algorithms Support an element or attribute in a PolicySet, Policy, or Rule that provides parameters to be used by a Combining Algorithm that is combining the PolicySet, Policy, or Rule. TYPE: New functionality STATUS: Re-opened with proposal from WI#11 on 12 Feb. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200402/msg00012.html [Simon] http://lists.oasis-open.org/archives/xacml/200402/msg00016.html [Michiharu/Simon] http://lists.oasis-open.org/archives/xacml/200402/msg00022.html [Polar/Michiharu] http://lists.oasis-open.org/archives/xacml/200402/msg00028.html [Michiharu/Polar] http://lists.oasis-open.org/archives/xacml/200402/msg00032.html [Polar/Michiharu] http://lists.oasis-open.org/archives/xacml/200402/msg00039.html [TC discuss] http://lists.oasis-open.org/archives/xacml/200402/msg00043.html [Michiharu/Polar] CHAMPION: Michiharu Kudo WI#11. XACML Extension Points Define schema extension points for XACML. See http://lists.oasis-open.org/archives/xacml/200310/msg00098.html for information that may be relevant on extension points. TYPE: New functionality STATUS: Open. Proposal was specific to WI#10, so moved there 12 Feb 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200402/msg00039.html [TC discuss] CHAMPION: Anne Anderson WI#12. Environment Element in Target Allow the Target Element to include an Environment element, just as it now includes Subject, Resource, and Action elements. TYPE: New functionality STATUS: Accepted for 2.0 on 8 Jan 2004. In 2.0 draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200305/msg00012.html CHAMPION: Michiharu Kudo WI#13. Optional Target Elements Make Subjects, Resources, Actions elements optional in a Target. Missing element has same semantics as <Any.../> Make Target itself optional. Missing element has same semantics as a Target containing <AnySubject/>, <AnyResource/>, <AnyAction/>. <Any...> dropped. Environment elements to be treated same as Subject, Resource, Action as far as omitted elements are concerned. TYPE: Simplicity of policy construction STATUS: In 2.0 draft 05 Section 5.5. Add note on "<Subjects></Subjects> = false" to Draft 06. For vote 19 Feb. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00038.html http://lists.oasis-open.org/archives/xacml/200401/msg00062.html [FG accepts] http://lists.oasis-open.org/archives/xacml/200401/msg00064.html [Bill] http://lists.oasis-open.org/archives/xacml/200401/msg00065.html [Daniel] http://lists.oasis-open.org/archives/xacml/200401/msg00066.html [Daniel] http://lists.oasis-open.org/archives/xacml/200401/msg00067.html [Bill] http://lists.oasis-open.org/archives/xacml/200401/msg00068.html [Bill] http://lists.oasis-open.org/archives/xacml/200401/msg00069.html [Daniel] http://lists.oasis-open.org/archives/xacml/200402/msg00039.html [TC discuss] CHAMPION: Hal Lockhart WI#14. Signature envelope requirements Any new XACML work items to meet requirements for signature envelopes around an XACML schema instance, such as including an XACML Policy or Request in a signed SAML Assertion. TYPE: New functionality STATUS: Closed for XACML 2.0. Abstract. Related: <none> PROPOSAL: ABSTRACT CHAMPION: ? WI#15. Encrypted XACML schema instance requirements Any new XACML work items to meet requirements for encrypted XACML Policy or Context schema instances. TYPE: New functionality STATUS: Closed for XACML 2.0. Abstract. Related: <none> PROPOSAL: ABSTRACT CHAMPION: ? WI#16. XACML Policy in SAML Response Conditions Profile uses of XACML Policy instances as a syntax for specifying Conditions in a SAML Response. TYPE: SAML Profile STATUS: Closed for XACML 2.0: no proposal by 20 Oct 2003. PROPOSAL: CHAMPION: Frank Siebenlist WI#17. XACML Policy in SAML Request Conditions Profile use of SAML Conditions element as a way for a PEP to pass an XACML Policy to be used by the PDP in evaluating the Request. TYPE: SAML Profile STATUS: Closed for XACML 2.0: no proposal by 20 Oct 2003. PROPOSAL: CHAMPION: Frank Siebenlist WI#18. Obligations in Rules Allow Rule to contain Obligations. TYPE: Simplicity of policy construction STATUS: Open issues. Polar will try to develop alternative approach. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200305/msg00011.html http://lists.oasis-open.org/archives/xacml/200401/msg00062.html [Polar issues] http://lists.oasis-open.org/archives/xacml/200402/msg00013.html [Michiharu use case] CHAMPION: Michiharu Kudo WI#19. Rule as lowest administrative unit Allow a Rule to be the lowest administrative unit for XACML. Probably required to support RuleIdReference. TYPE: New functionality STATUS: Closed for 2.0 20 Oct 2003. No proposal. Related #8. PROPOSAL: CHAMPION: Michiharu Kudo WI#20. Non-normative XACML interpretation guide Rationale, examples, possible implementation models; general information that would help XACML users know the intent of the XACML TC for the use of XACML elements. TYPE: New document not tied to XACML 2.0. STATUS: Needs proposal. Not part of 2.0. PROPOSAL: CHAMPION: ? WI#21. Non-normative XACML Primer Primer for XACML usage. TYPE: New document not tied to XACML 2.0. STATUS: Needs proposal. Not part of 2.0. PROPOSAL: CHAMPION: ? WI#22. time-in-range function Provide a function for comparing that a time of day is between two other times of day. TYPE: Erratum fix STATUS: Approved in general 30 Oct 2003. In 2.0 draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200309/msg00005.html CHAMPION: Seth Proctor WI#23. Use XQuery comparison functions for date, time, dateTime Allow date, time, and dateTime functions to handle comparing a value with no time zone with a value with a time zone. TYPE: Erratum fix STATUS: Approved in general 30 Oct 2003. 8 Jan 2004: Seth to consult on new XML Schema time values. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200307/msg00044.html http://lists.oasis-open.org/archives/xacml/200312/msg00061.html [Status update] CHAMPION: Seth Proctor WI#24. Define a schema for function declarations Define a schema for declaring the signature of a function. Probably needed with #2 if #2 includes finding parsing and evaluation code for new FunctionIds. TYPE: New functionality STATUS: Closed for 2.0: no proposal by 20 Oct 2003. Related: #2. PROPOSAL: CHAMPION: Daniel Engovatov WI#25. Function for comparing file system pathnames. Define a function for specifying and comparing file system pathnames used in resource-id. Possibly new DataType also. TYPE: New functionality STATUS: Closed for 2.0: handle per #9 proposal. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200309/msg00088.html CHAMPION: Anne Anderson WI#26. Define policy reduction (partial evaluation) of a policy Define a process for reducing a policy based on known information, leaving only the unresolved predicates. The reduced policy is returned along with the context with which the reduction was done. TYPE: New functionality STATUS: Closed for 2.0 20 Oct 2003. Use case requirement satisfied using a different model. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00080.html CHAMPION: Frank Siebenlist WI#27. Version number element or attribute in an XACML policy. Some way of indicating the version of a policy having a particular XACML policy id, and a way of placing version constraints on a policy reference. TYPE: New functionality STATUS: Accepted for 2.0 8 Jan 2004. In 05 draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200312/msg00062.html [Seth] http://lists.oasis-open.org/archives/xacml/200312/msg00067.html [Tim] CHAMPION: Seth Proctor WI#28. Define "current time/date/dateTime" during policy evaluation Specify whether time/date/dateTime are constant over a policy evaluation. Proposal is that it be constant. TYPE: Erratum fix STATUS: Approved in general 30 Oct 2003. In 2.0 draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00006.html http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #28 CHAMPION: Seth Proctor WI#29. Policy Authority Delegation The ability to express in a policy rule that a certain authorization authority is allowed to administer access control policy for a certain target: i.e. way to say "Frank is trusted to issue policies for resource X". If the PDP trusts the policy rule that states this, then the PDP would also trust policies issued by Frank for resource X. TYPE: Administration Policy Profile STATUS: Open issues. Related: #1,29,31,35,38. Topic for F2F. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #1 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #29 http://lists.oasis-open.org/archives/xacml/200310/msg00042.html #29 http://lists.oasis-open.org/archives/xacml/200310/msg00046.html http://lists.oasis-open.org/archives/xacml/200310/msg00053.html http://lists.oasis-open.org/archives/xacml/200310/msg00054.html http://lists.oasis-open.org/archives/xacml/200310/msg00060.html http://lists.oasis-open.org/archives/xacml/200310/msg00061.html http://lists.oasis-open.org/archives/xacml/200310/msg00062.html http://lists.oasis-open.org/archives/xacml/200310/msg00063.html http://lists.oasis-open.org/archives/xacml/200311/msg00022.html [Frank:Haskell model] http://lists.oasis-open.org/archives/xacml/200311/msg00030.html [schema changes] http://lists.oasis-open.org/archives/xacml/200311/msg00032.html [Tim:summary] http://lists.oasis-open.org/archives/xacml/200311/msg00034.html [Bill:weird case] http://lists.oasis-open.org/archives/xacml/200311/msg00036.html http://lists.oasis-open.org/archives/xacml/200312/msg00009.html [Polar:Abadi calculus] http://lists.oasis-open.org/archives/xacml/200312/msg00015.html [Use cases] http://lists.oasis-open.org/archives/xacml/200312/msg00019.html [Von Welch,resp] http://lists.oasis-open.org/archives/xacml/200312/msg00022.html [Polar to Frank] http://lists.oasis-open.org/archives/xacml/200312/msg00025.html [Frank to Polar] http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] CHAMPION: Frank Siebenlist WI#30. Passing of explicit policy in the Authorization Decision Query This is the same as #17, except that it is more general (i.e. policy from PEP not necessarily passed in SAML Conditions), and also explicitly states that the authority to specify the policy to use has been delegated to the PEP. TYPE: SAML Profile STATUS: Closed for 2.0 21 Oct 2003. See #17. Solve by making remote PAP accessible to the local PDP. Possibly related: #29,38. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #2 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #30 CHAMPION: Frank Siebenlist WI#31. Attribute Issuer as Subject The current attribute issuer type is a string. This restriction doesn't allow one to easily point at an issuer as Subject, and it doesn't allow for any path validation that goes more than one level deep. By allowing an attribute issuer of type subject, one could cater for more complex use-cases that involve policy delegation. TYPE: New functionality STATUS: Open issues. Related: #1,29,31,35,38. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #3 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #31 CHAMPION: Frank Siebenlist ACTION 12 Feb: Depends on Admin Policy model. Request use cases from those interested in this item. Plan to agree on a model at the next F2F. This will require people to do homework ahead of time. WI#32. Standardize naming to specify rules for requestor's authz policy In a setting where a requester invokes certain operations of a service provider, the convention for the target of the service provider's policy is well defined: subject=requester, resource=service-provider, and action=operation. However, when we consider the policy evaluation on the requester's side to check whether an invocation on the service provider is allowed according to the requester's policy, then is it less clear. It is almost a mirror case, but if we take a convention where the "resource" is the one protected by the policy, the we should equate subject=service-provider and resource=requester with the same action=operation. Unfortunately, if we also have to consider the possibility that the service-provider can invoke an equivalent operation on the requester, then we need an additional way to discriminate between these cases. Maybe we can label the action with a category of "out-bound" (?). TYPE: New functionality. Separate profile? STATUS: Open issues. Related: #1,29,31,35,38. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #4 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #32 http://lists.oasis-open.org/archives/xacml/200310/msg00042.html #32 http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] CHAMPION: Frank Siebenlist ACTION 12 Feb: need Frank to explain his use case in a teleconference, not just in an e-mail. WI#33. XACML wsdl/porttype definition for <Req>/<Resp> exchange Abstract the decision request and response messages between the context handler and the PDP into a wsdl/porttype definition. TYPE: WSDL Profile STATUS: Needs detailed proposal. Related: #1. Not part of 2.0. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #5 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #33 CHAMPION: Frank Siebenlist WI#34. porttype/operations to ask for required attributes Allow a requester to query the resource's authorization policy for the required attributes for a Target such that it "knows" which one are missing and would have to be retrieved and presented with any request. TYPE: WSDL Profile STATUS: Open issues. Related: #1. Not part of 2.0. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #6 http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #34 CHAMPION: Frank Siebenlist WI#35. Policy on revealing missing attributes The returning of the missing attribute info is sensitive information and should itself be subject to policy. TYPE: New functionality STATUS: Closed for 2.0 21 Oct 2003. Related: #1,29,31,35,38. Can be solved using existing XACML policies. PROPOSAL: OLD: http://lists.oasis-open.org/archives/xacml/200308/msg00008.html #7 CURRENT: http://lists.oasis-open.org/archives/xacml/200310/msg00081.html CHAMPION: Frank Siebenlist WI#36. Check for requester authorized to ask for authz decision Proposes that the PDP have a formally defined access control mechanism to "downstream PDPs". The PDP should check whether the upstream PDP requester, i.e. subject associated with the context handler, is allowed to ask for the authorization decision. We need to be able to state this in a policy statement, and describe the correct operating procedure. TYPE: New functionality. Separate profile? STATUS: Open issues. Related: #1,29,30,31,35,38. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00035.html #36 http://lists.oasis-open.org/archives/xacml/200310/msg00074.html #36 on 20 Oct 2003 http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] CHAMPION: Frank Siebenlist ACTION 12 Feb 2004: This should be an aspect of our Administrative Policy, and should be resolved at the next F2F as part of the overall Administrative Policy framework. WI#37. Multiple <AttributeValue> elements for single <Attribute> in Request Allow <Attribute DataType="Y" ID=X> <AttributeValue DataType="Y">A</AttributeValue> <AttributeValue DataType="Y">B</AttributeValue> <AttributeValue DataType="Y">C</AttributeValue> </Attribute> as syntactic shorthand for <Attribute DataType="Y" ID=X> <AttributeValue DataType="Y">A</AttributeValue> </Attribute> <Attribute DataType="Y" ID=X> <AttributeValue DataType="Y">B</AttributeValue> </Attribute> <Attribute DataType="Y" ID=X> <AttributeValue DataType="Y">C</AttributeValue> </Attribute> This makes it easier to convert SAML Attributes into XACML Attributes, and is consistent with the way XPath treats the same set of AttributeValues. TYPE: Simplicity of Request construction STATUS: Closed via text in 2.0 draft 05. Related: #1. Need to address Rebekah's questions. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00037.html #37 http://lists.oasis-open.org/archives/xacml/200401/msg00019.html [Rebekah - Q's] http://lists.oasis-open.org/archives/xacml/200402/msg00029.html [Rebekah] CHAMPION: Rebekah Lepro ACTION: address Rebekah's questions. WI#38. Policies for the Administration of XACML Policies XACML defines a language to express policies about access to resources. But it is also desirable to create policies about the creation, modification and deletion of XACML policies. In a sense XACML already allows this, since XACML policies are agnostic to the semantics of the resources being protected. However, it is very desirable for administrative policies to specify not the "name" of policies being administered, but their "content." TYPE: New functionality. Administration Policy Profile? STATUS: Closed as duplicate of #19 on 12 Feb 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200308/msg00050.html http://lists.oasis-open.org/archives/xacml/200310/msg00037.html #38 http://lists.oasis-open.org/archives/xacml/200310/msg00054.html http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] CHAMPION: Hal Lockhart WI#39. Make Status in the XACML Response optional Makes it possible to allow Status for Indeterminate situations to be conveyed in the protocol envelope (such as SAML DecisionStatement) rather than in the XACML Response for cases where that is more appropriate. Avoids having redundant and possibly inconsistent Status fields when XACML Response is carried in some envelope that also has a Status. TYPE: New functionality STATUS: Accepted in general for 2.0 30 Oct 2003. In 2.0 draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00037.html #39 http://lists.oasis-open.org/archives/xacml/200310/msg00040.html CHAMPION: Hal Lockhart WI#40. Define a SAML PolicyQuery and PolicyStatement Define syntax for SAML that will allow a Query for one or more Policy or PolicySet instances with specified Policy[Set]Ids or with copy of a Request Context that need to be matched, and will return the requested instances in a PolicyStatement in a SAML Assertion. TYPE: XACML Profile for Using SAML STATUS: Related to #48. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00031.html http://lists.oasis-open.org/archives/xacml/200310/msg00032.html http://lists.oasis-open.org/archives/xacml/200310/msg00034.html http://lists.oasis-open.org/archives/xacml/200310/msg00036.html http://lists.oasis-open.org/archives/xacml/200310/msg00037.html #40 CHAMPION: Hal Lockhart WI#41. General attribute classifications instead of Subject, Resource, ... Instead of using the fixed attribute classifications "Subject", "Resource", "Action", and "Environment", allow arbitrary attribute classifications to be used, each identified by a URN and associated with a profile that explains its use and semantics. TYPE: New functionality. STATUS: Closed for 2.0 8 Jan 2004, although could be considered for future version. Related: #2,24. PROPOSAL: CHAMPION: Daniel Engovatov WI#42. Requests asking for access to multiple elements in a hierarchical resource How to express requests that ask for access to multiple elements in a hierarchical resource, i.e. "Does Frank have access to all elements under /X/Y?". XACML currently defines a standard Resource AttributeId "urn:oasis:names:tc:xacml:1.0:resource:scope" that can be used to express whether a request applies to "Immediate", "Children", or "Descendents". XACML also currently defines a way to include an XML document in a <ResourceContent> element as part of a Request. This is sufficient if all hierarchies are assumed to be XML documents and if the document itself is always included in <ResourceContent> when multiple decisions are requested. What is missing is a way of handling hierarchical resources that are not XML documents, such as file system directories. To handle other types of hierarchies, it will be necessary to identify what type of hierarchy the resource is and, in a related profile, what syntax is to be used in expressing and referring to nodes and elements in hierarchies of that type. Proposal 200310/msg00078.html proposes to solve this by requiring all hierarchical resources to be represented and referenced as XML instances using XPath expressions. If this is accepted, then the specification needs to state this explicitly. TYPE: New functionality. STATUS: Accepted in general for 2.0 30 Oct 2003. Needs to be explained in specification in non-normative Hierarchical Resources section. Resolution is: supply resource hierarchy in XML representation in <ResourceContent>. Related: #9,25,42. CLOSED 12 Feb 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00078.html http://lists.oasis-open.org/archives/xacml/200310/msg00082.html http://lists.oasis-open.org/archives/xacml/200401/msg00047.html [Simon add'l issues] http://lists.oasis-open.org/archives/xacml/200401/msg00048.html [Michiharu to Simon] http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] CHAMPION: Simon Godik WI#43. Examine interactions between approved work items As part of the editorial process, a check is needed to ensure that there are no unexpected problematic interactions between approved work items. TYPE: Editorial STATUS: Open issues PROPOSAL: ? CHAMPION: ? WI#44. Fix examples in the XACML Specification Review & correct all examples before the 2.0 release. TYPE: Editorial STATUS: Abstract. Related: #45. PROPOSAL: Abstract CHAMPION: WI#45. Fix AttributeAssignment example in Section 4.2.4.3 (Rule 3) In this example, AttributeAssignments contain AttributeSelectors and AttributeDesignators. While this isn't illegal, the example implies something about the specification that isn't true (ie, that the PDP will interpret the contents of assignments). TYPE: Editorial STATUS: CLOSED 12 Feb. In 2.0 draft. Related: #44. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00064.html http://lists.oasis-open.org/archives/xacml/200310/msg00067.html http://lists.oasis-open.org/archives/xacml/200310/msg00068.html http://lists.oasis-open.org/archives/xacml/200310/msg00069.html http://lists.oasis-open.org/archives/xacml/200311/msg00009.html CHAMPION: Michiharu Kudo WI#46. Status detail for missing attributes In 6.15 there is an explanation for what detail to include with the missing-attribute status code: Attributes specify one or more missing values, and if an AttributeValue is included, then this specifies an acceptable value. If no AttributeValue is included, then the PDP is specifying the identifier and datatype only. Sounds good. The problem is that the Attribute type is <xs:element ref="xacml-context:AttributeValue"/> This means that it's not valid to have an Attribute with no AttributeValue. So, it's not possible for the PDP to specify a missing attribute without specifying at least one acceptable value (note that even an empty AttributeValue tag, which is still legal, is still technically a value). PDPs need a way to specify missing attributes without providing acceptable values. TYPE: Erratum STATUS: Need to define a new "missing attribute" schema element that can return attribute meta-data (with or without Attribute Value information) for this. Accepted in general 30 Oct 2003. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200310/msg00076.html http://lists.oasis-open.org/archives/xacml/200310/msg00077.html CHAMPION: Seth Proctor ACTION 12 Feb 2004: Seth to produce missing attribute schema. WI#47. New SAML Authorization Decision Query/Response using XACML TYPE: XACML Profile for Using SAML STATUS: SAML accepts XACML/OGSA proposal in general (link), but says XACML should define a SAML extension using the SAML namespace. We need to verify that SAML 2.0 changes do not invalidate our proposal. Only Sun(?), Oblix, and Entrust seem to use the SAML 1.0 version, so will be deprecated in SAML 2.0. PROPOSAL: (find link) CHAMPION: Anne Anderson and Hal Lockhart WI#48. PAP Interface to a PDP/PRP Define an interface to a PDP or PRP (Policy Repository Point) from a PAP for pushing and/or managing policies. TYPE: XACML Interface Definitions Specification STATUS: Related to #38,40. Requirements spec needed. PROPOSAL: CHAMPION: Tim Moses WI#49. Improve example showing how obligations work The example in Section 4.2.4.3 is somewhat misleading and has caused confusion among XACML users. See PROPOSAL for specific points. TYPE: Erratum STATUS: Closed. Same as #45. CHAMPION: Michiharu Kudo WI#50. Fix obligations erratum: fulfilled by PDP Lines 2077-2078 in the 1.1 specification say "The <Obligations> element SHALL contain a set of obligations that MUST be fulfilled by the PDP in conjunction with the authorization decision." "PDP" should be "PEP". TYPE: Erratum STATUS: Accepted for 2.0 8 Jan 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200311/msg00060.html CHAMPION: Anne Anderson WI#51. Clarify obligations: "fulfill" vs. "understand" Lines:1768-1770,2731-2733,2756-2757,2859-2862,3060-3062 Intermixed uses of "fulfill" and "understand" with respect to obligations semantics is confusing. For example, "what is the recommended action for an obligation that is understood yet is unable to be fulfilled?" TYPE: Erratum STATUS: CLOSED. Fixed in Draft 05. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200311/msg00059.html CHAMPION: Michiharu Kudo WI#52. New section explaining not backwards compatible and listing changes The XACML 2.0 specification should have a new section that explains 2.0 is not backwards compatible with 1.0 or 1.1, and listing the changes made between 1.0 (and/or 1.1) and 2.0. TYPE: Editorial STATUS: Awaiting detailed proposal once other issues resolved. PROPOSAL: CHAMPION: Bill Parducci WI#53. Drop <Function> element I believe its purpose can be served by the <Apply> element when the FunctionId attribute identifies one of the bag functions. We already allow a similar special case in the <Condition> element, which is an <Apply> element whose FunctionId attribute must identify a function whose return type is boolean. As currently structured, the bag function does not "enclose" the attributes or functions to which it applies. If we require the use of the <Apply> element instead, the bag function can enclose the attributes or functions to which it applies. See lines [a477] to [a491] in draft 3. TYPE: Simplicity STATUS: Closed for 2.0. Tim will add additional clarify text to the description of <Function> explaining how and why it is used. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200312/msg00063.html [Tim] http://lists.oasis-open.org/archives/xacml/200312/msg00064.html [Daniel] http://lists.oasis-open.org/archives/xacml/200312/msg00065.html [Polar to Tim] CHAMPION: Tim Moses WI#54. Is resource-id required? First issue: V1.1 Section 6.3 schema fragment says resource must have 0 or more attributes, but text that follows says there must be one and only one instance of the "resource-id" attribute (implying one or more attributes, exactly one of which must be "resource-id"). These two should be made consistent. [Tim] Second issue: Why do we require "resource-id"? Some policies may depend only on the security label of the resource, only on the host machine where the resource is located, or some other attribute of the resource, but may not care about the actual "resource-id" at all. [Anne] TYPE: Simplicity and erratum fix STATUS: Voted to make resource-id optional 8 Jan 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200401/msg00000.html [Tim] http://lists.oasis-open.org/archives/xacml/200401/msg00001.html [Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00002.html [Seth to Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00003.html [Bill to Tim] http://lists.oasis-open.org/archives/xacml/200401/msg00004.html [Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00005.html [Daniel to Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00006.html [Satoshi to Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00007.html [Daniel to Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00008.html [Satoshi to Daniel] http://lists.oasis-open.org/archives/xacml/200401/msg00009.html [Daniel to Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00010.html [Satoshi to Daniel] http://lists.oasis-open.org/archives/xacml/200401/msg00011.html [Daniel to Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00012.html [Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00013.html [Daniel to Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00014.html [Satoshi to Daniel] http://lists.oasis-open.org/archives/xacml/200401/msg00015.html [Daniel to Satoshi] http://lists.oasis-open.org/archives/xacml/200401/msg00016.html [Satoshi to Seth] http://lists.oasis-open.org/archives/xacml/200401/msg00017.html [Tim] CHAMPION: Tim Moses and Anne Anderson WI#55. Converge SAML and XACML Attribute schema definitions Need algorithmic mapping between SAML Attribute and XACML Attribute. Some issues are keeping Issuer syntax compatible and handling two-part SAML Attribute names (domain plus id) and one-part XACML Attribute. Might be able to handle some of this using AttributeSelector, and inserting SAML Attribute Assertion as AttributeValue with DataType of saml:Assertion or saml:Attribute. TYPE: Interoperability. Some of this could go into an XACML SAML Profile. STATUS: Open. Still under discussion. SAML has not frozen their 2.0 Attribute definition. PROPOSAL: http://www.oasis-open.org/apps/org/workgroup/security/download.php/4884/draft-sstc-attribute-02.pdf [Rebekah SAML proposal] http://lists.oasis-open.org/archives/xacml/200401/msg00031.html [Anne - draft answer to SAML] http://lists.oasis-open.org/archives/xacml/200401/msg00032.html [Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00034.html [Scott Cantor] http://lists.oasis-open.org/archives/xacml/200401/msg00039.html [SAML/XACML mtg] CHAMPION: Rebekah Lepro WI#56. Should Request Context be optional (non-normative) Use of the Request Context should be non-normative, so long as policy evaluation is consistent with the behavior given a Request Context. TYPE: Erratum fix STATUS: Accepted for 2.0 8 Jan 2004. Detailed text below accepted 22 Jan 2004. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200401/msg00037.html [detailed text] CHAMPION: Hal Lockhart WI#57. Make Environment element optional in Request Context TYPE: Simplicity STATUS: Closed for 2.0 8 Jan 2004. Leave as is: minOccurs="1". WI#58. Standard hierarchy schemas Given resolution to hierarchical resources in WI#9, there needs to be a standard schema for certain common hierarchies such as UFS. TYPE: Interoperability. Could be separate profile. STATUS: Open PROPOSAL: http://lists.oasis-open.org/archives/xacml/200401/msg00059.html [Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00060.html [Rebekah to Anne] http://lists.oasis-open.org/archives/xacml/200401/msg00061.html [Anne to Rebekah] http://lists.oasis-open.org/archives/xacml/200401/msg00063.html [Frank] http://lists.oasis-open.org/archives/xacml/200402/msg00018.html [Anne] CHAMPION: Anne Anderson (for UFS and WFS) ISSUE: need to be able to associate attributes such as owner with nodes. Look at W3C ResourceDescriptionFramework, in case it offers anything. We don't know if this applies, but the name sounds promising. WI#59. Define standard "role" subject attribute Add following to Appendix B.5 "Subject attributes": This identifier indicates a role associated with the subject. Values of this attribute SHOULD be of type "http://www.w3.org/2001/XMLSchema#anyURI". urn:oasis:names:tc:xacml:2.0:subject:role TYPE: Interoperability. STATUS: 12 Feb 2004 FG recommended including in next draft. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200401/msg00038.html CHAMPION: Anne Anderson WI#60. Define standard "purpose" attributes In order to deal with certain regulatory requirements, it would be useful to have a standard "purpose" attribute for resource and for action. urn:oasis:names:tc:xacml:2.0:resource:purpose urn:oasis:names:tc:xacml:2.0:action:purpose We could also define a standard rule that requires the resource purpose to include the action purpose. This would enforce the requirement that data resources only be used for the purposes for which they were collected. TYPE: Interoperability STATUS: Open. Study Tim's proposal. PROPOSAL: http://lists.oasis-open.org/archives/xacml/200402/msg00059.html [FG discuss] http://lists.oasis-open.org/archives/xacml/200402/msg00067.html [Tim] CHAMPION: Tim Moses
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