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rfc3275 - Network Working Group D Eastlake 3rd Request for...

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Network Working Group D. Eastlake 3rd Request for Comments: 3275 Motorola Obsoletes: 3075 J. Reagle Category: Standards Track W3C D. Solo Citigroup March 2002 (Extensible Markup Language) XML-Signature Syntax and Processing Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (c) 2002 The Internet Society & W3C (MIT, INRIA, Keio), All Rights Reserved. Abstract This document specifies XML (Extensible Markup Language) digital signature processing rules and syntax. XML Signatures provide integrity, message authentication, and/or signer authentication services for data of any type, whether located within the XML that includes the signature or elsewhere. Table of Contents 1. Introduction ................................................... 3 1.1 Editorial and Conformance Conventions ......................... 4 1.2 Design Philosophy ............................................. 4 1.3 Versions, Namespaces and Identifiers .......................... 4 1.4 Acknowledgements .............................................. 6 1.5 W3C Status .................................................... 6 2. Signature Overview and Examples ................................ 7 2.1 Simple Example (Signature, SignedInfo, Methods, and References) 8 2.1.1 More on Reference ........................................... 9 2.2 Extended Example (Object and SignatureProperty) ............... 10 2.3 Extended Example (Object and Manifest) ........................ 12 3.0 Processing Rules .............................................. 13 3.1 Core Generation ............................................... 13 3.1.1 Reference Generation ........................................ 13 Eastlake, et al. Standards Track [Page 1]
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RFC 3275 XML-Signature Syntax and Processing March 2002 3.1.2 Signature Generation ........................................ 13 3.2 Core Validation ............................................... 14 3.2.1 Reference Validation ........................................ 14 3.2.2 Signature Validation ........................................ 15 4.0 Core Signature Syntax ......................................... 15 4.0.1 The ds:CryptoBinary Simple Type ............................. 17 4.1 The Signature element ......................................... 17 4.2 The SignatureValue Element .................................... 18 4.3 The SignedInfo Element ........................................ 18 4.3.1 The CanonicalizationMethod Element .......................... 19 4.3.2 The SignatureMethod Element ................................. 21 4.3.3 The Reference Element ....................................... 21 4.3.3.1 The URI Attribute ......................................... 22 4.3.3.2 The Reference Processing Model ............................ 23 4.3.3.3 Same-Document URI-References .............................. 25 4.3.3.4 The Transforms Element .................................... 26 4.3.3.5 The DigestMethod Element .................................. 28 4.3.3.6 The DigestValue Element ................................... 28 4.4 The KeyInfo Element ........................................... 29 4.4.1 The KeyName Element ......................................... 31 4.4.2 The KeyValue Element ........................................ 31 4.4.2.1 The DSAKeyValue Element ................................... 32 4.4.2.2 The RSAKeyValue Element ................................... 33 4.4.3 The RetrievalMethod Element ................................. 34 4.4.4 The X509Data Element ........................................ 35 4.4.5 The PGPData Element ......................................... 38 4.4.6 The SPKIData Element ........................................ 39 4.4.7 The MgmtData Element ........................................ 40 4.5 The Object Element ............................................ 40 5.0 Additional Signature Syntax ................................... 42 5.1 The Manifest Element .......................................... 42 5.2 The SignatureProperties Element ............................... 43 5.3 Processing Instructions in Signature Elements ................. 44 5.4 Comments in Signature Elements ................................ 44 6.0 Algorithms .................................................... 44 6.1 Algorithm Identifiers and Implementation Requirements ......... 44 6.2 Message Digests ............................................... 46 6.2.1 SHA-1 ....................................................... 46 6.3 Message Authentication Codes .................................. 46 6.3.1 HMAC ........................................................ 46 6.4 Signature Algorithms .......................................... 47 6.4.1 DSA ......................................................... 47 6.4.2 PKCS1 (RSA-SHA1) ............................................ 48 6.5 Canonicalization Algorithms ................................... 49 6.5.1 Canonical XML ............................................... 49 6.6 Transform Algorithms .......................................... 50 6.6.1 Canonicalization ............................................ 50 6.6.2 Base64 ...................................................... 50 Eastlake, et al. Standards Track [Page 2]
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RFC 3275 XML-Signature Syntax and Processing March 2002 6.6.3 XPath Filtering ............................................. 51 6.6.4 Enveloped Signature Transform ............................... 54 6.6.5 XSLT Transform .............................................. 54 7. XML Canonicalization and Syntax Constraint Considerations
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