Edit comment LC-2390 for XML Security Working Group

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Comment LC-2390

Comment Shortname:

Commenter: Scott Cantor <cantor.2@osu.edu>

Message-id:

Section of the document concerned:

[Free text description]Document as a wholeXML Signature Syntax and Processing Version 1.1 /**/... W3C Working Draft 04 February 2010 Abstract This document specifies XML digital signature proc... Abstract Status of This Document This section describes the status o... Status of This Document Table of Contents 1. Introduction 1.1 Editorial and Conf... Table of Contents 1. Introduction This document specifies XML syntax and proc... 1. Introduction 1.1 Editorial and Conformance Conventions For readability,... 1.1 Editorial and Conformance Conventions 1.2 Design Philosophy The design philosophy and requirement... 1.2 Design Philosophy 1.3 Versions Namespaces and Identifiers This specification... 1.3 Versions Namespaces and Identifiers 1.4 Acknowledgements The contributions of the members of th... 1.4 Acknowledgements 2. Signature Overview and Examples This section provides an... 2. Signature Overview and Examples 2.1 Simple Example (Signature, SignedInfo, Methods, and Re... 2.1 Simple Example (Signature, SignedInfo, Methods, and References) 2.1.1 More on Reference [s05] <Reference URI="http://... 2.1.1 More on Reference 2.2 Extended Example (Object and SignatureProperty) This s... 2.2 Extended Example (Object and SignatureProperty) 2.3 Extended Example (Object and Manifest) The Manifest ele... 2.3 Extended Example (Object and Manifest) 3. Processing Rules The sections below describe the operati... 3. Processing Rules 3.1 Signature Generation The required steps include the gen... 3.1 Signature Generation 3.1.1 Reference Generation For each data object being signe... 3.1.1 Reference Generation 3.1.2 Signature Generation Create SignedInfo element with... 3.1.2 Signature Generation 3.2 Core Validation The required steps of core validation i... 3.2 Core Validation 3.2.1 Reference Validation Canonicalize the SignedInfo ele... 3.2.1 Reference Validation 3.2.2 Signature Validation Obtain the keying information f... 3.2.2 Signature Validation 4. Core Signature Syntax The general structure of an XML si... 4. Core Signature Syntax 4.1 The ds:CryptoBinary Simple Type This specification defi... 4.1 The ds:CryptoBinary Simple Type 4.2 The Signature element The Signature element is the root... 4.2 The Signature element 4.3 The SignatureValue Element The SignatureValue element c... 4.3 The SignatureValue Element 4.4 The SignedInfo Element The structure of SignedInfo incl... 4.4 The SignedInfo Element 4.4.1 The CanonicalizationMethod Element CanonicalizationMe... 4.4.1 The CanonicalizationMethod Element Note 4.4.2 The SignatureMethod Element SignatureMethod is a requ... 4.4.2 The SignatureMethod Element 4.4.3 The Reference Element Reference is an element that ma... 4.4.3 The Reference Element 4.4.3.1 The URI Attribute The URI attribute identifies a da... 4.4.3.1 The URI Attribute 4.4.3.2 The Reference Processing Model Note: XPath is recom... 4.4.3.2 The Reference Processing Model Note 4.4.3.3 Same-Document URI-References Dereferencing a same-d... 4.4.3.3 Same-Document URI-References 4.4.3.4 The Transforms Element The optional Transforms elem... 4.4.3.4 The Transforms Element 4.4.3.5 The DigestMethod Element DigestMethod is a required... 4.4.3.5 The DigestMethod Element 4.4.3.6 The DigestValue Element DigestValue is an element t... 4.4.3.6 The DigestValue Element 4.5 The KeyInfo Element KeyInfo is an optional element that... 4.5 The KeyInfo Element binary (ASN.1 DER) X.509 Certificate 4.5.1 The KeyName Element The KeyName element contains a st... 4.5.1 The KeyName Element 4.5.2 The KeyValue Element The KeyValue element contains a... 4.5.2 The KeyValue Element 4.5.2.1 The DSAKeyValue Element Identifier Type="http://ww... 4.5.2.1 The DSAKeyValue Element http://www.w3.org/2000/09/xmldsig#DSAKeyValue 4.5.2.2 The RSAKeyValue Element Identifier Type="http://ww... 4.5.2.2 The RSAKeyValue Element http://www.w3.org/2000/09/xmldsig#RSAKeyValue 4.5.2.3 The ECKeyValue Element Identifier Type="http://www... 4.5.2.3 The ECKeyValue Element http://www.w3.org/2009/xmldsig11#ECKeyValue 4.5.2.3.1 Explicit Curve Parameters The ECParameters elemen... 4.5.2.3.1 Explicit Curve Parameters 4.5.2.3.2 Compatibility with RFC 4050 Implementations that... 4.5.2.3.2 Compatibility with RFC 4050 4.5.3 The RetrievalMethod Element A RetrievalMethod element... 4.5.3 The RetrievalMethod Element 4.5.4 The X509Data Element Identifier Type="http://www.w3.... 4.5.4 The X509Data Element http://www.w3.org/2000/09/xmldsig#X509Data 4.5.4.1 Distinguished Name Encoding Rules To encode a disti... 4.5.4.1 Distinguished Name Encoding Rules 4.5.5 The PGPData Element Identifier Type="http://www.w3.o... 4.5.5 The PGPData Element http://www.w3.org/2000/09/xmldsig#PGPData 4.5.6 The SPKIData Element Identifier Type="http://www.w3.... 4.5.6 The SPKIData Element http://www.w3.org/2000/09/xmldsig#SPKIData 4.5.7 The MgmtData Element Identifier Type="http://www.w3.... 4.5.7 The MgmtData Element http://www.w3.org/2000/09/xmldsig#MgmtData 4.5.8 XML Encryption EncryptedKey and Agreement Elements T... 4.5.8 XML Encryption EncryptedKey and Agreement Elements 4.5.9 The DEREncodedKeyValue Element Identifier Type="http... 4.5.9 The DEREncodedKeyValue Element http://www.w3.org/2009/xmldsig11#DEREncodedKeyValue 4.6 The Object Element Identifier Type="http://www.w3.org/... 4.6 The Object Element "http://www.w3.org/2000/09/xmldsig#Object" 5. Additional Signature Syntax This section describes the o... 5. Additional Signature Syntax 5.1 The Manifest Element Identifier Type="http://www.w3.or... 5.1 The Manifest Element "http://www.w3.org/2000/09/xmldsig#Manifest" 5.2 The SignatureProperties Element   Identifier Type="htt... 5.2 The SignatureProperties Element http://www.w3.org/2000/09/xmldsig#SignatureProperties 5.3 Processing Instructions in Signature Elements No XML p... 5.3 Processing Instructions in Signature Elements 5.4 Comments in Signature Elements XML comments are not use... 5.4 Comments in Signature Elements 6. Algorithms This section identifies algorithms used with... 6. Algorithms 6.1 Algorithm Identifiers and Implementation Requirements... 6.1 Algorithm Identifiers and Implementation Requirements 6.2 Message Digests This specification defines several poss... 6.2 Message Digests 6.2.1 SHA-1 Identifier: http://www.w3.org/2000/09/xmldsig#... 6.2.1 SHA-1 http://www.w3.org/2001/04/xmlenc#sha512 6.2.2 SHA-256 Identifier: http://www.w3.org/2001/04/xmlenc... 6.2.2 SHA-256 6.2.3 SHA-384 Identifier: http://www.w3.org/2000/09/xmldsi... 6.2.3 SHA-384 http://www.w3.org/2000/09/xmldsig#sha384 6.2.4 SHA-512 Identifier: http://www.w3.org/2001/04/xmlenc... 6.2.4 SHA-512 6.3 Message Authentication Codes MAC algorithms take two im... 6.3 Message Authentication Codes 6.3.1 HMAC Identifier: http://www.w3.org/2000/09/xmldsig#h... 6.3.1 HMAC http://www.w3.org/2000/09/xmldsig#hmac-sha1 http://www.w3.org/2001/04/xmldsig-more#hmac-sha256 http://www.w3.org/2001/04/xmldsig-more#hmac-sha384 http://www.w3.org/2001/04/xmldsig-more#hmac-sha512 6.4 Signature Algorithms Signature algorithms take two impl... 6.4 Signature Algorithms 6.4.1 DSA Identifier: http://www.w3.org/2000/09/xmldsig#ds... 6.4.1 DSA http://www.w3.org/2000/09/xmldsig#dsa-sha1 http://www.w3.org/2009/xmldsig11#dsa-sha256 Security considerations regarding DSA key sizes 6.4.2 RSA (PKCS#1 v1.5) Identifier: http://www.w3.org/2000... 6.4.2 RSA (PKCS#1 v1.5) http://www.w3.org/2000/09/xmldsig#rsa-sha1 http://www.w3.org/2001/04/xmldsig-more#rsa-sha256 http://www.w3.org/2001/04/xmldsig-more#rsa-sha384 http://www.w3.org/2001/04/xmldsig-more#rsa-sha512 Security considerations regarding RSA key sizes 6.4.3 ECDSA Identifiers: http://www.w3.org/2001/04/xmldsig... 6.4.3 ECDSA http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384 http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512 6.5 Canonicalization Algorithms If canonicalization is perf... 6.5 Canonicalization Algorithms 6.5.1 Canonical XML 1.0 Identifier for required Canonical... 6.5.1 Canonical XML 1.0 6.5.2 Canonical XML 1.1 Identifier for required Canonical... 6.5.2 Canonical XML 1.1 6.5.3 Exclusive XML Canonicalization 1.0 Identifier for Ex... 6.5.3 Exclusive XML Canonicalization 1.0 6.6 Transform Algorithms A Transform algorithm has a single... 6.6 Transform Algorithms 6.6.1 Canonicalization Any canonicalization algorithm that... 6.6.1 Canonicalization 6.6.2 Base64 Identifiers: http://www.w3.org/2000/09/xmldsi... 6.6.2 Base64 http://www.w3.org/2000/09/xmldsig#base64 6.6.3 XPath Filtering Identifier: http://www.w3.org/TR/199... 6.6.3 XPath Filtering Function: node-set here() 6.6.4 Signature Transform Identifier: http://www.w3.org/20... 6.6.4 Signature Transform http://www.w3.org/2000/09/xmldsig#enveloped-signature 6.6.5 XSLT Transform Identifier: http://www.w3.org/TR/1999... 6.6.5 XSLT Transform 7. XML Canonicalization and Syntax Constraint Consideratio... 7. XML Canonicalization and Syntax Constraint Considerations 7.1 XML 1.0 Syntax Constraints, and Canonicalization XML 1... 7.1 XML 1.0 Syntax Constraints, and Canonicalization 7.2 DOM/SAX Processing and Canonicalization In addition to... 7.2 DOM/SAX Processing and Canonicalization 7.3 Namespace Context and Portable Signatures In [XPATH] a... 7.3 Namespace Context and Portable Signatures 8. Security Considerations The XML Signature specification... 8. Security Considerations 8.1 Transforms A requirement of this specification is to pe... 8.1 Transforms 8.1.1 Only What is Signed is Secure First, obviously, signa... 8.1.1 Only What is Signed is Secure 8.1.2 Only What is "Seen" Should be Signed Additionally, th... 8.1.2 Only What is "Seen" Should be Signed 8.1.3 "See" What is Signed Just as a user should only sign... 8.1.3 "See" What is Signed 8.2 Check the Security Model This specification uses public... 8.2 Check the Security Model 8.3 Algorithms, Key Lengths, Certificates, Etc. The streng... 8.3 Algorithms, Key Lengths, Certificates, Etc. 9. Schema 9.1 XSD Schema XML Signature Core Schema Instan... 9. Schema 9.1 XSD Schema XML Signature Core Schema Instance xmldsig... 9.1 XSD Schema 9.2 RNG Schema This section is non-normative. Non-normative... 9.2 RNG Schema 10. Definitions Authentication Code (Protected Checksum) A... 10. Definitions Authentication Code Protected Checksum Authentication, Message Authentication, Signer Checksum Core Data Object Integrity Object Resource Signature Signature, Application Signature, Detached Signature, Enveloping Signature, Enveloped Transform Validation, Core Validation, Reference Validation, Signature Validation, Trust/Application A. References Dated references below are to the latest know... A. References A.1 Normative references [FIPS-180-3] FIPS PUB 180-3 Secu... A.1 Normative references [FIPS-180-3] [FIPS-186-3] [HMAC] [HTTP11] [LDAP-DN] [NFC] [OCSP] [PGP] [PKCS1] [RFC2045] [RFC2119] [RFC3279] [RFC3406] [RFC4051] [RFC4055] [RFC5280] [RFC5480] [SECG1] [SP800-57] [URI] [URN] [URN-OID] [UTF-8] [X509V3] [XML-C14N] [XML-C14N11] [XML-EXC-C14N] [XML-MEDIA-TYPES] [XML-NAMES] [XML10] [XMLDSIG-XPATH-FILTER2] [XMLENC-CORE1] [XMLSCHEMA-1] [XMLSCHEMA-2] [XPATH] [XPTR-ELEMENT] [XPTR-FRAMEWORK] [XSL10] [XSLT] A.2 Informative references [ABA-DSIG-GUIDELINES] Digital S... A.2 Informative references [ABA-DSIG-GUIDELINES] [CVE-2009-0217] [DOM-LEVEL-1] [IEEE1363] [RANDOM] [RDF-PRIMER] [RELAXNG-SCHEMA] [RFC4050] [RFC4949] [SAX] [SHA-1-Analysis] [SHA-1-Collisions] [SOAP12-PART1] [UTF-16] [XHTML10] [XML-Japanese] [XMLDSIG-BESTPRACTICES] [XMLDSIG-CORE] [XMLDSIG-REQUIREMENTS] [XMLSEC-RELAXNG] [XMLSEC11-REQS] [XPTR-XMLNS] [XPTR-XPOINTER] [XPTR-XPOINTER-CR2001]
or

Refinement of the section concerned:

Status:

open proposal pending resolved_yes resolved_no resolved_partial other assigned to Nobody

Type: substantive editorial typo question general comment undefined

Resolution status:

Response drafted Resolution implemented Reply sent to commenter

Response status:

No response from Commenter yet Commenter approved disposition Commenter objected to disposition
Commenter's response (URI):

Comment:

Just reviewing the schema and noted there's a redundancy:

<simpleType name="ECPointType">
<restriction base="ds:CryptoBinary"/>
</simpleType>

Other places in the EC key syntax schema just use CryptoBinary directly, so
I'd suggest removing that type definition and
s/dsig11:ECPointType/ds:CryptoBinary for consistency.

This shouldn't affect any implementations at this point.

Related issues: (space separated ids)

WG Notes: The WG discussed this on 15 June, http://www.w3.org/2010/06/15-xmlsec-minutes.html#item04 WG members noted that the reason for the different type is to highlight different semantics and processing rules. In particular CryptoBinary retains leading 0's (unlike Base64) and ECPointType is two points in one binary representation, and could possibly have compression. This is the rationale for a new type and this approach is already in use.

Resolution: RESOLUTION: No change needed for LC-2390, Schema Redundancy last call issue

(Please make sure the resolution is adapted for public consumption)