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Subject: Proposed errata for XML Signature references
I propose we reference XML Signature, Second Edition [1] in new specifications produced by the SSTC, including those that have not yet become OASIS Standard. I also propose corresponding errata items for SAML 2.0, below. The Second Edition of XML Signature is not a new version of XML Signature and does not change the namespace for XML Signature, nor does it introduce breaking changes. For this reason I believe we should be able to update SAML references to refer to it. This edition of XML Signature does incorporate errata, update RFC references, clarify text and introduce the new Canonical XML Version 1.1 algorithm [2] as a required algorithm. Since uses of XML Signature may specify the algorithms used, SAML instances may continue to specify Canonical XML 1.0, though it would be preferable if Canonical XML 1.1 support were introduced and used. I believe the benefits of referencing the Second Edition warrant approving an errata item. Canonical XML 1.1 addresses issues related to inheritance of attributes in the XML namespace when canonicalizing document subsets, including the requirement not to inherit xml:id, and to treat xml:base URI path processing properly. A summary of changes in XML Signature Second Edition is available at [3]. Note that changing the reference in the SAML Conformance document does not change the algorithms explicitly called out in that document, though we may wish to discuss requiring Canonical XML 1.1. I have not included that in this proposal. The Second Edition was not a joint IETF-W3C effort even though the first edition was. There is work underway to produce a new RFC corresponding to the Second Edition, but I propose SAML 2.0 only reference the Second Edition Recommendation for the sake of clarify of having a single reference. In addition the Recommendation is listed under normative references while the RFC is listed under informative references. The RFC is also referenced only in SAML core while the Rec is referenced throughout the SAML 2.0 specification set (as noted in the proposed errata below). Thus I specifically propose the following two errata to be added to the errata document (once approved), as well as two new normative references [4]: (1) Add additional normative references to Section 1.1 of the Errata document: [SAMLAuthnCxt] J. Kemp et al. Authentication Context for the OASIS Security Assertion Markup Language (SAML) V2.0. OASIS SSTC, March 2005. Document ID saml-authn-context-2.0-os. See http://www.oasis- open.org/committees/security/. [SAMLSecure] F. Hirsch et al. Security and Privacy Considerations for the OASIS Security Assertion Markup Language (SAML) V2.0. OASIS SSTC, March 2005. Document ID saml-sec-consider-2.0-os. See http:// www.oasis-open.org/committees/security/. ---- E64: Update XML Signature references to XML Signature, Second Edition Change [SAMLCore] Section 9.1 at lines 3415-3416 , [SAMLProf] Section 9 at lines 2205-2206, [SAMLAuthnCxt] Section 4 at lines 3926-3928, [SAMLConf] Section 6 at lines 410-412, [SAMLSecure] at lines 1078-1079 to replace a reference to XML Signature with the updated XML Signature, Second Edition reference, as follows: Original text: D. Eastlake et al. XML-Signature Syntax and Processing. World Wide Web Consortium, February 2002. New text: D. Eastlake et al. XML Signature Syntax and Processing, Second Edition. World Wide Web Consortium, June 2008. ---- E65: Remove XML Signature RFC reference: Change [SAMLCore] Section 9.2 at lines 3439-3440 to remove the following reference: [RFC 3075] D. Eastlake, J. Reagle, D. Solo. XML-Signature Syntax and Processing. IETF RFC 3075, March 2001. See http://www.ietf.org/rfc/rfc3075.txt. --- regards, Frederick Frederick Hirsch Nokia [1] http://www.w3.org/TR/2008/REC-xmldsig-core-20080610/ [2] http://www.w3.org/TR/xml-c14n11/ [3] http://www.w3.org/TR/2008/REC-xmldsig-core-20080610/explain [4] http://docs.oasis-open.org/security/saml/v2.0/sstc-saml-approved- errata-2.0.pdf
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