ISO/IEC 9594-4:2008
(Main)Information technology — Open Systems Interconnection — The Directory: Procedures for distributed operation — Part 4:
Information technology — Open Systems Interconnection — The Directory: Procedures for distributed operation — Part 4:
ISO/IEC 9594-4:2008 specifies the behaviour of DSAs taking part in the distributed Directory application. The allowed behaviour has been designed so as to ensure a consistent service given a wide distribution of the DIB across many DSAs. The Directory is not intended to be a general purpose database system, although it may be built on such systems. It is assumed that there is a considerably higher frequency of queries than of updates.
Technologies de l'information — Interconnexion de systèmes ouverts (OSI) — L'annuaire: Procédures pour le fonctionnement réparti — Partie 4:
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 9594-4
Sixth edition
2008-12-15
Information technology — Open Systems
Interconnection — The Directory:
Procedures for distributed operation
Technologies de l'information — Interconnexion de systèmes ouverts
(OSI) — L'annuaire: Procédures pour le fonctionnement réparti
Reference number
ISO/IEC 9594-4:2008(E)
©
ISO/IEC 2008
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ISO/IEC 9594-4:2008(E)
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ISO/IEC 9594-4:2008(E)
CONTENTS
Page
Foreword . vi
Introduction . vii
SECTION 1 – GENERAL. 1
1 Scope. 1
2 Normative references . 1
2.1 Identical Recommendations | International Standards. 1
2.2 Other references. 2
3 Definitions . 2
3.1 Communication Model Definitions. 2
3.2 Basic Directory Definitions. 2
3.3 Directory Model Definitions. 2
3.4 DSA Information Model definitions. 2
3.5 Abstract Service definitions. 3
3.6 Directory replication definitions. 3
3.7 Distributed operation definitions . 3
4 Abbreviations . 5
SECTION 2 – OVERVIEW . 6
5 Conventions . 5
6 Overview. 6
7 Distributed Directory System Model . 7
8 DSA Interactions Model . 7
8.1 Decomposition of a request. 8
8.2 Uni-chaining . 8
8.3 Multi-chaining. 9
8.4 Referral. 10
8.5 Mode determination. 10
SECTION 4 – DSA ABSTRACT SERVICE . 11
9 Overview of DSA Abstract Service. 11
10 Information types . 11
10.1 Introduction . 11
10.2 Information types defined elsewhere. 11
10.3 Chaining Arguments. 12
10.4 Chaining Results. 14
10.5 Operation Progress . 15
10.6 Trace Information . 15
10.7 Reference Type. 16
10.8 Access point information . 16
10.9 DIT Bridge knowledge. 17
10.10 Exclusions . 17
10.11 Continuation Reference. 18
11 Bind and Unbind . 19
11.1 DSA Bind. 19
11.2 DSA Unbind . 19
12 Chained operations . 19
12.1 Chained operations. 20
12.2 Chained Abandon operation . 20
12.3 Chained operations and protocol version. 21
13 Chained errors . 21
13.1 Introduction . 21
13.2 DSA Referral . 21
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ISO/IEC 9594-4:2008(E)
Page
SECTION 5 – DISTRIBUTED PROCEDURES. 22
14 Introduction. 22
14.1 Scope and Limits . 22
14.2 Conformance. 22
14.3 Conceptual model . 22
14.4 Individual and cooperative operation of DSAs . 22
14.5 Cooperative agreements between DSAs. 23
15 Distributed Directory behaviour . 23
15.1 Cooperative fulfilment of operations. 23
15.2 Phases of operation processing. 23
15.3 Managing Distributed Operations. 24
15.4 Loop handling . 25
15.5 Other considerations for distributed operation. 25
15.6 Authentication of Distributed Operations. 27
16 The Operation Dispatcher. 27
16.1 General Concepts. 27
16.2 Procedures of the Operation Dispatcher. 31
16.3 Overview of procedures. 32
17 Request Validation procedure . 33
17.1 Introduction . 33
17.2 Procedure parameters. 34
17.3 Procedure definition . 35
18 Name Resolution procedure. 37
18.1 Introduction . 37
18.2 Find DSE procedure parameters. 37
18.3 Procedures. 38
19 Operation evaluation . 48
19.1 Modification procedure . 48
19.2 Single entry interrogation procedure . 54
19.3 Multiple entry interrogation procedure . 54
20 Continuation Reference procedures. 67
20.1 Chaining strategy in the presence of shadowing . 67
20.2 Issuing chained subrequests to a remote DSA . 69
20.3 Procedures' parameters. 69
20.4 Definition of the procedures . 70
20.5 Abandon procedure . 78
21 Results Merging procedure. 79
22 Procedures for distributed authentication. 81
22.1 Originator authentication . 82
22.2 Results authentication . 82
SECTION 6 – KNOWLEDGE ADMINISTRATION. 83
23 Knowledge administration overview . 83
23.1 Maintenance of knowledge references. 83
23.2 Requesting cross reference. 84
23.3 Knowledge inconsistencies . 85
23.4 Knowledge references and contexts . 85
24 Hierarchical operational bindings. 86
24.1 Operational binding type characteristics . 86
24.2 Operational binding information object Class definition. 88
24.3 DSA procedures for hierarchical operational binding management. 89
24.4 Procedures for operations . 92
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ISO/IEC 9594-4:2008(E)
Page
24.5 Use of application contexts . 92
25 Non-specific hierarchical operational binding. 92
25.1 Operational binding type characteristics . 93
25.2 Operational binding information object class definition . 94
25.3 DSA procedures for non-specific hierarchical operational binding management . 94
25.4 Procedures for operations . 96
25.5 Use of application contexts . 96
Annex A – ASN.1 for Distributed Operations. 97
Annex B – Example of distributed name resolution. 100
Annex C – Distributed use of authentication. 102
C.1 Summary. 102
C.2 Distributed protection model . 102
C.3 Signed chained operations. 102
C.4 Encrypted chained operations . 104
C.5 Signed and encrypted distributed operations. 106
Annex D – Specification of hierarchical and non-specific hierarchical operational binding types . 108
Annex E – Knowledge maintenance example . 110
Annex F – Amendments and corrigenda . 113
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ISO/IEC 9594-4:2008(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 9594-4:2008 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with
ITU-T. The identical text is published as ITU-T Rec. X.518 (11/2008).
This sixth edition cancels and replaces the fifth edition (ISO/IEC 9594-4:2005), which has been technically
revised.
ISO/IEC 9594 consists of the following parts, under the general title Information technology — Open Systems
Interconnection — The Directory:
⎯ Part 1: Overview of concepts, models and services
⎯ Part 2: Models
⎯ Part 3: Abstract service definition
⎯ Part 4: Procedures for distributed operation
⎯ Part 5: Protocol specifications
⎯ Part 6: Selected attribute types
⎯ Part 7: Selected object classes
⎯ Part 8: Public-key and attribute certificate frameworks
⎯ Part 9: Replication
⎯ Part 10: Use of systems management for administration of the Directory
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ISO/IEC 9594-4:2008(E)
Introduction
This Recommendation | International Standard, together with other Recommendations | International Standards, has
been produced to facilitate the interconnection of information processing systems to provide directory services. A set of
such systems, together with the directory information that they hold, can be viewed as an integrated whole, called the
Directory. The information held by the Directory, collectively known as the Directory Information Base (DIB), is
typically used to facilitate communication between, with or about objects such as application entities, people, terminals
and distribution lists.
The Directory plays a significant role in Open Systems Interconnection, whose aim is to allow, with a minimum of
technical agreement outside of the interconnection standards themselves, the interconnection of information processing
systems:
– from different manufacturers;
– under different managements;
– of different levels of complexity; and
– of different ages.
This Recommendation | International Standard specifies the procedures by which the distributed components of the
Directory interwork in order to provide a consistent service to its users.
This Recommendation | International Standard provides the foundation frameworks upon which industry profiles can be
defined by other standards groups and industry forums. Many of the features defined as optional in these frameworks
may be mandated for use in certain environments through profiles. This sixth edition technically revises and enhances,
but does not replace, the fifth edition of this Recommendation | International Standard. Implementations may still claim
conformance to the fifth edition. However, at some point, the fifth edition will not be supported (i.e., reported defects
will no longer be resolved). It is recommended that implementations conform to this sixth edition as soon as possible.
This sixth edition specifies versions 1 and 2 of the Directory protocols.
The first and second editions specified only version 1. Most of the services and protocols specified in this edition are
designed to function under version 1. However, some enhanced services and protocols, e.g., signed errors, will not
function unless all Directory entities involved in the operation have negotiated version 2. Whichever version has been
negotiated, differences between the services and between the protocols defined in the six editions, except for those
specifically assigned to version 2, are accommodated using the rules of extensibility defined in ITU-T Rec. X.519 |
ISO/IEC 9594-5.
Annex A, which is an integral part of this Recommendation | International Standard, provides the ASN.1 module for
directory distributed operations.
Annex B, which is not an integral part of this Recommendation | International Standard, describes an example of
distributed name resolution.
Annex C, which is not an integral part of this Recommendation | International Standard, describes authentication in the
distributed operations environment.
Annex D, which is an integral part of this Recommendation | International Standard, provides the definitions of the
ASN.1 information object classes introduced in this Directory Specification.
Annex E, which is not an integral part of this Recommendation | International Standard, illustrates knowledge
maintenance.
Annex F, which is not an integral part of this Recommendation | International Standard, lists the amendments and defect
reports that have been incorporated to form this edition of this Recommendation | International Standard.
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ISO/IEC 9594-4:2008 (E)
INTERNATIONAL STANDARD
ITU-T RECOMMENDATION
Information technology – Open Systems Interconnection –
The Directory: Procedures for distributed operation
SECTION 1 – GENERAL
1 Scope
This Recommendation | International Standard specifies the behaviour of DSAs taking part in the distributed Directory
application. The allowed behaviour has been designed so as to ensure a consistent service given a wide distribution of
the DIB across many DSAs.
The Directory is not intended to be a general purpose database system, although it may be built on such systems. It is
assumed that there is a considerably higher frequency of queries than of updates.
2 Normative references
The following Recommendations and International Standards contain provisions which, through reference 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 Standardization Bureau of the ITU maintains a list of currently
valid ITU-T Recommendations.
2.1 Identical Recommendations | International Standards
– ITU-T Recommendation X.200 (1994) | ISO/IEC 7498-1:1994, Information technology – Open Systems
Interconnection – Basic Reference Model: The Basic Model.
– ITU-T Recommendation X.500 (2008) | ISO/IEC 9594-1:2008, Information technology – Open Systems
Interconnection – The Directory: Overview of concepts, models and services.
– ITU-T Recommendation X.501 (2008) | ISO/IEC 9594-2:2008, Information technology – Open Systems
Interconnection – The Directory: Models.
– ITU-T Recommendation X.509 (2008) | ISO/IEC 9594-8:2008, Information technology – Open Systems
Interconnection – The Directory: Public-key and attribute certificate frameworks.
– ITU-T Recommendation X.511 (2008) | ISO/IEC 9594-3:2008, Information technology – Open Systems
Interconnection – The Directory: Abstract service definition.
– ITU-T Recommendation X.519 (2008) | ISO/IEC 9594-5:2008, Information technology – Open Systems
Interconnection – The Directory: Protocol specifications.
– ITU-T Recommendation X.520 (2008) | ISO/IEC 9594-6:2008, Information technology – Open Systems
Interconnection – The Directory: Selected attribute types.
– ITU-T Recommendation X.521 (2008) | ISO/IEC 9594-7:2008, Information technology – Open Systems
Interconnection – The Directory: Selected object classes.
– ITU-T Recommendation X.525 (2008) | ISO/IEC 9594-9:2008, Information technology – Open Systems
Interconnection – The Directory: Replication.
– ITU-T Recommendation X.530 (2008) | ISO/IEC 9594-10:2008, Information technology – Open Systems
Interconnection – The Directory: Use of systems management for administration of the Directory.
– ITU-T Recommendation X.680 (2008) | ISO/IEC 8824-1:2008, Information technology – Abstract
Syntax Notation One (ASN.1): Specification of basic notation.
ITU-T Rec. X.518 (11/2008) 1
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ISO/IEC 9594-4:2008 (E)
– ITU-T Recommendation X.681 (2008) | ISO/IEC 8824-2:2008, Information technology – Abstract
Syntax Notation One (ASN.1): Information object specification.
– ITU-T Recommendation X.682 (2008) | ISO/IEC 8824-3:2008, Information technology – Abstract
Syntax Notation One (ASN.1): Constraint specification.
– ITU-T Recommendation X.683 (2008) | ISO/IEC 8824-4:2008, Information technology – Abstract
Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications.
2.2 Other references
– IETF RFC 4510 (2006), Lightweight Directory Access Protocol (LDAP): Technical Specification Road
Map.
– IETF RFC 4511 (2006), Lightweight Directory Access Protocol (LDAP): The protocol.
3 Definitions
For the purposes of this Recommendation | International Standard, the following definitions apply:
3.1 Communication Model Definitions
The following term is defined in ITU-T Rec. X.519 | ISO/IEC 9594-5:
a) application-entity-title.
3.2 Basic Directory Definitions
The following terms are defined in ITU-T Rec. X.500 | ISO/IEC 9594-1:
a) (the) Directory;
b) Directory Information Base.
3.3 Directory Model Definitions
The following terms are defined in ITU-T Rec. X.501 | ISO/IEC 9594-2:
a) access point;
b) alias;
c) distinguished name;
d) Directory Information Tree;
e) Directory System Agent (DSA);
f) Directory User Agent (DUA);
g) relative distinguished name.
3.4 DSA Information Model definitions
The following terms are defined in ITU-T Rec. X.501 | ISO/IEC 9594-2:
a) category;
b) commonly usable;
c) context prefix;
d) cross reference;
e) DIB fragment;
f) DSA information tree;
g) DSA-Specific Entry (DSE);
h) DSE type;
i) immediate superior reference;
j) knowledge information;
k) knowledge reference category;
2 ITU-T Rec. X.518 (11/2008)
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ISO/IEC 9594-4:2008 (E)
l) knowledge reference type;
m) naming context;
n) non-specific knowledge;
o) non-specific subordinate reference;
p) operati
...
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