1、 International Telecommunication Union ITU-T X.893TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2007) SERIES X: DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY OSI applications Generic applications of ASN.1 Information technology Generic applications of ASN.1: Fast infoset security ITU-
2、T Recommendation X.893 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY PUBLIC DATA NETWORKS Services and facilities X.1X.19 Interfaces X.20X.49 Transmission, signalling and switching X.50X.89 Network aspects X.90X.149 Maintenance X.150X.179 Administrative arrang
3、ements X.180X.199 OPEN SYSTEMS INTERCONNECTION Model and notation X.200X.209 Service definitions X.210X.219 Connection-mode protocol specifications X.220X.229 Connectionless-mode protocol specifications X.230X.239 PICS proformas X.240X.259 Protocol Identification X.260X.269 Security Protocols X.270X
4、.279 Layer Managed Objects X.280X.289 Conformance testing X.290X.299 INTERWORKING BETWEEN NETWORKS General X.300X.349 Satellite data transmission systems X.350X.369 IP-based networks X.370X.379 MESSAGE HANDLING SYSTEMS X.400X.499 DIRECTORY X.500X.599 OSI NETWORKING AND SYSTEM ASPECTS Networking X.60
5、0X.629 Efficiency X.630X.639 Quality of service X.640X.649 Naming, Addressing and Registration X.650X.679 Abstract Syntax Notation One (ASN.1) X.680X.699 OSI MANAGEMENT Systems Management framework and architecture X.700X.709 Management Communication Service and Protocol X.710X.719 Structure of Mana
6、gement Information X.720X.729 Management functions and ODMA functions X.730X.799 SECURITY X.800X.849 OSI APPLICATIONS Commitment, Concurrency and Recovery X.850X.859 Transaction processing X.860X.879 Remote operations X.880X.889 Generic applications of ASN.1 X.890X.899 OPEN DISTRIBUTED PROCESSING X.
7、900X.999 TELECOMMUNICATION SECURITY X.1000 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. X.893 (05/2007) i INTERNATIONAL STANDARD ISO/IEC 24824-3 ITU-T RECOMMENDATION X.893 Information technology Generic applications of ASN.1: Fast infoset security Summary ITU-T
8、Rec. X.893 | ISO/IEC 24824-3 specifies the application of encryption and integrity (either separately or in combination) to a fragment of an XML infoset that is serialized using the Fast Infoset specification in ITU-T Rec. X.891 | ISO/IEC 24824-1. The specification of encryption uses the W3C Recomme
9、ndation XML Encryption Syntax and Processing. The specification of integrity uses the W3C Recommendations W3C Canonical XML Version 1.0, W3C Exclusive XML Canonicalization Version 1.0 and XML-Signature Syntax and Processing. Source ITU-T Recommendation X.893 was approved on 29 May 2007 by ITU-T Stud
10、y Group 17 (2005-2008) under the ITU-T Recommendation A.8 procedure. An identical text is also published as ISO/IEC 24824-3. ii ITU-T Rec. X.893 (05/2007) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Tel
11、ecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization
12、 Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technolog
13、y which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance w
14、ith this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory
15、language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of t
16、his Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the da
17、te of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consul
18、t the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2008All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. X.893 (05/2007) iii CONTENTS Page 1 Scope . 1 2 Normative references 1 2.1 Identical
19、 Recommendations | International Standards . 1 2.2 Additional references. 1 3 Definitions 2 3.1 Imported definitions 2 3.2 Additional definitions 2 4 Abbreviations 2 5 Notation . 2 6 Canonical Fast Infoset algorithms 3 6.1 Requirements on canonical Fast Infoset algorithms 3 6.2 Requirements on canon
20、ical XML algorithms for use by a canonical Fast Infoset algorithm 3 6.3 Restrictions when serializing an XML infoset to a canonical fast infoset document 3 6.4 Canonical Fast Infoset algorithms. 4 7 W3C XML Signature and Fast Infoset 4 8 W3C XML Encryption and Fast Infoset 5 8.1 Application-level ex
21、tensions for encryption 5 8.2 Generation of a complete XML infoset from part of an XML infoset. 5 8.3 Application-level extensions for decryption 6 Annex A Examples of signing and encrypting an XML infoset 7 A.1 Introduction of examples 7 A.2 Signing and verifying the SOAP message infoset 7 A.3 Encr
22、ypting and decrypting the SOAP message infoset 10 Annex B Signed SOAP message infoset. 12 Annex C Signed and encrypted SOAP message infoset . 13 Bibliography . 14 iv ITU-T Rec. X.893 (05/2007) Introduction This Recommendation | International Standard specifies: a) the application of integrity to one
23、 or more parts of an XML infoset using Fast Infoset serialization and W3C XML Signature; b) the application of encryption to one or more parts of an XML infoset using Fast Infoset serialization and W3C XML Encryption. W3C XML Signature specifies a means of generating W3C XML Signature information it
24、ems that contain (inter alia): a) explicit (using URIs) or implicit (dependent on the use of the XML infoset signature information item) identification of one or more data objects (a data object is anything that either already is, or can be transformed into, a string of octets); b) a (possibly empty
25、) list of sequential transforms (specified by URIs for the algorithm to be used in performing the transform) from those data objects to a sequence of octets; these transforms can select all or part of the identified data objects, but are required to result in a sequence of octets; c) digest and encr
26、yption information for the production of a signature of the resulting sequence of octets; and d) the resulting signature. This Recommendation | International Standard specifies four (canonical Fast Infoset) algorithms that can be referenced in a W3C XML Signature transform (and provides URIs for the
27、m) and can also be (independently) used as the algorithm for the W3C XML Signature canonicalization method. NOTE 1 The same Fast Infoset algorithm could be used for both the transform and the canonicalization method, but use of two different Fast Infoset algorithms (or a Fast Infoset algorithm and s
28、ome other algorithm) is not excluded. In all four cases, the input to the canonical Fast Infoset algorithm is either an XML infoset, or an XPath node set (restricted, in accordance with 6.1.4 b, to those node sets that produce a well-formed XML document when serialized). The output of all four canon
29、ical Fast Infoset algorithms is a sequence of octets (the octets of a fast infoset document, see ITU-T Rec. X.891 | ISO/IEC 24824-1) that are suitable for digest and hashing in order to provide a signature in accordance with W3C XML Signature. NOTE 2 This will usually be the last transform in the se
30、quential list of W3C XML Signature transforms, but need not be. A typical use will be to sign one or more parts of a single XML infoset. NOTE 3 Use to sign parts of multiple XML infosets is not excluded. It is expected, but not required, that the resulting W3C XML Signature information items will be
31、 used either as a detached signature, or as an enveloping or enveloped signature (see W3C XML Signature) for the XML infoset that is signed, and that the resulting XML infoset will be serialized using ITU-T Rec. X.891 | ISO/IEC 24824-1. This Recommendation | International Standard specifies applicat
32、ion-level extensions (see 3.2.1) to W3C XML Encryption. These application-level extensions enable encryption to be applied to part of an XML infoset using octets provided by a Fast Infoset serialization, rather than to the octets provided by an XML serialization of those parts. NOTE 4 W3C XML Encryp
33、tion can be applied to a complete fast infoset document as specified in W3C XML Encryption, 3.1, without the use of this Recommendation | International Standard. The MimeType attribute will have the value “application/fastinfoset“. The means of identifying the parts of the XML infoset that are encry
34、pted is specified by W3C XML Encryption and allows the encryption of: a) an element information item and its properties, including any direct or indirect child information items (and their properties); and b) the child information items of the child property of an element information item and their
35、properties, including any direct or indirect child information items (and their properties). Encryption requires that those parts of an XML infoset that are to be encrypted have to be first serialized into a string of octets for input to an encryption algorithm. The ability to produce a serializatio
36、n of a and b above is not supported by ITU-T Rec. X.891 | ISO/IEC 24824-1, but is specified in clause 8 of ITU-T Rec. X.893 | ISO/IEC 24824-3 (using ITU-T Rec. X.891 | ISO/IEC 24824-1). This is done by converting such fragments (in a defined way) to a complete XML infoset and then applying ITU-T Rec
37、. X.891 | ISO/IEC 24824-1 to the complete XML infoset. This Recommendation | International Standard also specifies two URIs, one for a above and one for b above, that are used in XML Encryption to identify the application-level extensions which determine the use of Fast Infoset serialization rather
38、than XML serialization for the production of the octets to be input to an encryption algorithm. ITU-T Rec. X.893 (05/2007) v Use of Fast Infoset serialization to determine the octets for input to an encryption algorithm in general reduces the number of octets that have to be encrypted and decrypted,
39、 and would be normal (but not necessary) if the XML infoset is transferred using a Fast Infoset serialization. NOTE 5 It is also possible (but would be unusual) to use Fast Infoset serialization to determine the octets for input to an encryption algorithm when the XML infoset is to be transferred us
40、ing an XML serialization. The serialization of an XML infoset containing W3C XML Signature information items and/or W3C XML Encryption information items to a fast infoset document has the following advantages over serialization to an XML document: a) repeating information such as multiple signed ref
41、erences or multiple encrypted parts with the same XML tags or content will be encoded more efficiently; and b) the (binary) octets associated with signature values, digest values, cipher values or keys may be encoded directly (see ITU-T Rec. X.891 | ISO/IEC 24824-1, 10.3) if a (binary) fast infoset
42、document is used to serialize the XML infoset; when serializing an XML infoset to an XML document (which is a string of characters), such octets are required to be base64 encoded, increasing processing speed and size. Clause 6 specifies four canonical Fast Infoset algorithms that can be referenced i
43、n a W3C XML Signature transform. Clause 7 specifies the use of W3C XML Signature with canonical Fast Infoset algorithms. Clause 8 specifies the use of W3C XML Encryption for the encryption of parts of an XML infoset that are serialized to fast infoset documents. Annex A does not form an integral par
44、t of this Recommendation | International Standard and provides examples of signing and validating a SOAP XML infoset (that makes use of canonical Fast Infoset algorithms), and encrypting and decrypting a SOAP message infoset (that makes use of the encryption of part of the SOAP message infoset that
45、is serialized to a fast infoset document). Annexes B and C do not form an integral part this Recommendation | International Standard, and provide examples of a signed SOAP message infoset and a signed and encrypted SOAP message infoset, respectively. ISO/IEC 24824-3:2007 (E) ITU-T Rec. X.893 (05/200
46、7) 1 INTERNATIONAL STANDARD ITU-T RECOMMENDATION Information technology Generic applications of ASN.1: Fast infoset security 1 Scope This Recommendation | International Standard specifies four (canonical Fast Infoset) algorithms that can be used in the application of W3C XML Signature (and provides
47、URIs for them). It also specifies application-level extensions to the W3C XML Encryption processing rules for the encryption of part of an XML infoset (see 8.1) serialized as a fast infoset document and for the decryption of an encrypted part (see 8.3) that was serialized as a fast infoset document.
48、 The use of any resulting W3C XML Signature information items or W3C XML Encryption information items is not within the scope of this Recommendation | International Standard. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference
49、in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardi
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