1、BRITISH STANDARD BS ISO/IEC 11586-2:1996 Information technology OpenSystems Interconnection Generic upper layers security: Security Exchange Service Element (SESE) service definition (ITU-T Rec. X.831 (1995)| ISO/IEC 11586-2:1996) ICS 35.100.70BS ISO/IEC 11586-2:1996 This British Standard, having be
2、en prepared under the direction of the DISC Board, was published under the authority of the Standards Board and comes into effect on 15 November 1996 BSI 11-1998 ISBN 0 580 26545 5 National foreword This British Standard reproduces verbatim ISO/IEC 11586-2:1996, and implements it as the UK national
3、standard. The UK participation in its preparation was entrusted to Technical Committee IST/21, Open Systems Interconnection, Data Management and Open Distributed Processing, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European commi
4、ttee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee is available on request. Cross-references The British St
5、andards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standar
6、d does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an
7、 inside front cover, the ISO/IEC front cover, pages ii to iv, pages 1 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover. Amendments issued since publication Amd.
8、No. Date CommentsBS ISO/IEC 11586-2:1996 ii BSI 11-1998 Contents Page Introduction 1 1 Scope 1 2 Normative references 1 2.1 Identical Recommendations|International Standards 1 3 Definitions 1 4 Abbreviations 1 5 Conventions 2 6 Service overview 2 6.1 Specific service facilities 2 6.2 Procedural mode
9、l for SE-TRANSFER service facility 2 7 Service definition 3 7.1 Parameters of service primitives 3 7.2 Service primitives 3 8 Sequencing information 4BS ISO/IEC 11586-2:1996 BSI 11-1998 iii Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
10、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
11、. 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
12、, ISO/IEC JTC 1. 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. International Standard ISO/IEC 11586-2 was prepared
13、 by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 21, Open systems interconnection, data management and open distributed processing, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.831. ISO/IEC 11586 consists of the following
14、parts, under the general title Information technology Open Systems Interconnection Generic upper layers security: Part 1: Overview, models and notation; Part 2: Security Exchange Service Element (SESE) service definition; Part 3: Security Exchange Service Element (SESE) protocol specification; Part
15、4: Protecting transfer syntax specification; Part 5: Security Exchange Service Element Protocol Implementation Conformance Statement (PICS) proforma; Part 6: Protecting transfer syntax Protocol Implementation Conformance Statement (PICS) proforma.iv blankBS ISO/IEC 11586-2:1996 BSI 11-1998 1 Introdu
16、ction This Recommendation|International Standard forms part of a series of Recommendations| multi-part International Standards, which provide(s) a set of facilities to aid the construction of Upper Layers protocols which support the provision of security services. The parts are as follows: Part 1: O
17、verview, Models and Notation; Part 2: Security Exchange Service Element Service Definition; Part 3: Security Exchange Service Element Protocol Specification; Part 4: Protecting Transfer Syntax Specification; Part 5: Security Exchange Service Element PICS Proforma; Part 6: Protecting Transfer Syntax
18、PICS Proforma. This Recommendation|International Standard constitutes Part 2 of this series. 1 Scope 1.1 This series of Recommendations|International Standards defines a set of generic facilities to assist in the provision of security services in application layer protocols. These include: a) a set
19、of notational tools to support the specification of selective field protection requirements in an abstract syntax specification, and to support the specification of security exchanges and security transformations; b) a service definition, protocol specification and PICS proforma for an application-s
20、ervice-element (ASE) to support the provision of security services within the Application Layer; c) a specification and PICS proforma for a security transfer syntax, associated with Presentation Layer support for security services in the Application Layer. 1.2 This Recommendation|International Stand
21、ard defines the service provided by the Security Exchange Service Element (SESE). The SESE is an ASE which allows the communication of security information to support the provision of security services within the Application Layer. 2 Normative references The following Recommendations and Internation
22、al 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 thi
23、s 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 Bur
24、eau 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/IEC7498-1:1994, Information technology Open Systems Interconnection Basic Reference Model: The Basic Model. ITU-T Recommendation X.8
25、03 (1994)| ISO/IEC10745:1995, Information technology Open Systems Interconnection Upper layers security model. 3 Definitions The following terms are used as defined in ITU-TRec.X.803|ISO/IEC10745: security exchange; security exchange item. 4 Abbreviations For the purposes of this Recommendation| Int
26、ernational Standard, the following abbreviations apply: ASE Application Service Element OSI Open Systems Interconnection PICS Protocol Implementation Conformance Statement SEI Security Exchange ItemBS ISO/IEC 11586-2:1996 2 BSI 11-1998 5 Conventions Clause 7 employs a tabular presentation of the SES
27、E service primitive parameters. Each parameter is summarized using the following notation: 6 Service overview The security exchange service element provides for the communication of information associated with any security exchange, as described in Part 1. This service is typically used for the tran
28、sfer of authentication, access control, non-repudiation or security management information. 6.1 Specific service facilities The following service facilities are defined: a) SE-TRANSFER; b) SE-U-ABORT; c) SE-P-ABORT. The SE-TRANSFER service facility is used to initiate a security exchange of a certai
29、n type, transfer the first security-exchange-item (SEI), as well as transfer the other SEIs of a security exchange. It is the only service facility required in completing a security exchange. The SE-U-ABORT service facility is used by the SESE service user to indicate that an error has occurred. Thi
30、s service is used to abnormally terminate a security exchange in progress. Optionally, this service may also abnormally terminate the ASO-association. The SE-P-ABORT service facility is used by the SESE service provider to indicate that an error has occurred. This service is used to abnormally termi
31、nate a security exchange in progress. Optionally, this service may also abnormally terminate the ASO-association. 6.2 Procedural model for SE-TRANSFER service facility Part 1 of this Recommendation|International Standard defines the following procedural model for security exchanges: An initial Secur
32、ity Exchange Item (SEI) is transferred from A to B. This is optionally followed by one or more transfers of SEIs between A and B, according to the specific security exchange identified in the SE-TRANSFER. The sequence may be terminated upon receipt of any SEI, by generation of an error indication by
33、 either service user or service provider. The time-sequence diagram shown below is an example illustrating the special case of a sequence of SEI transfers in alternate directions for an n-way security exchange. (This is an example of the “Alternating” class of exchange defined in 6.1 of ITU-T Rec. X
34、.830|ISO/IEC 11586-1.) M Presence of the parameter is mandatory O Presence of the parameter is an SESE protocol machine option U Presence of the parameter is an SESE service user option C Presence of the parameter is conditional (=) The value of this parameter is identical to the value of the corres
35、ponding parameter of the preceding SESE service primitive.BS ISO/IEC 11586-2:1996 BSI 11-1998 3 7 Service definition The SESE service primitives are of the following types: 7.1 Parameters of service primitives Following are descriptions of the service primitives parameters. 7.1.1 Security exchange i
36、dentifier This parameter identifies the particular type of security exchange being initiated. The identifier is established when the security exchange is defined, using the SECURITY-EXCHANGE information object class defined in Part 1. 7.1.2 Invocation identifier This parameter identifies a particula
37、r security exchange invocation. It is used for subsequently referring to that invocation for correlation purposes, in a SE-TRANSFER, SE-U-ABORT, or SE-P-ABORT primitives. Invocation identifiers are especially useful in handling multiple security exchange invocations within the context of, for exampl
38、e, an application association. Invocation identifiers are provided by the users of services which initiate security exchanges, and it is the responsibility of such users to ensure that these identifiers are unambiguous within the scope of all active security exchange invocations. 7.1.3 Security exch
39、ange item The item to be conveyed, as implied by the security exchange identifier. 7.1.4 Item identifier In a SE-TRANSFER primitive, this parameter indicates which item of the security exchange this primitive is conveying. In a SE-U-ABORT or SE-P-ABORT primitive, this parameter indicates the item of
40、 a security exchange on which an error condition has been detected. The specification of a security exchange may place specific constraints on the use of the “item identifier”. It is the responsibility of the SESE user to ensure that these constraints are met. 7.1.5 Start flag In a SE-TRANSFER primi
41、tive, this parameter is used to indicate the transfer of the first security-exchange-itemof a security exchange. 7.1.6 End flag In a SE-TRANSFER primitive, this parameter is used to indicate that this security exchange item corresponds to the last security exchange required to satisfy the security m
42、echanism. It is needed to accommodate those mechanisms requiring n exchanges, where n is not known a priori. 7.1.7 Error list This parameter is one or more lists of error codes with optional error parameters. The error code indicates the cause of a SE-U-ABORT being generated. Error codes are establi
43、shed when a security exchange is defined, using the SE-ERROR information object class defined in Part 1. The optional error parameters provide additional information describing the cause of an abort. 7.1.8 Problem code This parameter indicates the cause of an SE-P-ABORTbeing generated. The set of po
44、ssible values is specified in clause 6 of Part 3. 7.1.9 Fatality indicator In a SE-U-ABORT request primitive, this parameter is used to indicate to the SESE service provider whether or not the ASO-association (e.g.application association) must be terminated. In a SE-U-ABORT indication and SE-P-ABORT
45、 indication primitives, this parameter is used to indicate to the SESE service user whether or not the ASO-association (e.g. application association) must be terminated. 7.2 Service primitives The parameters of the SESE service primitives are provided below. (Refer to 6.1 for a definition of the SES
46、E services, and to 7.1 for a description of the specific parameters.) 7.2.1 SE-TRANSFER service The parameters of the SE-TRANSFER service are as follows: SE-TRANSFER Non-confirmed SE-U-ABORT Non-confirmed SE-P-ABORT Provider-initiated Parameter Name Req Ind Security exchange identifier M M(=) Invoca
47、tion identifier U C(=) Security exchange item M M(=) Item identifier U C(=) Start flag U C(=) End flag U C(=)BS ISO/IEC 11586-2:1996 4 BSI 11-1998 7.2.2 SE-U-ABORT service The parameters of the SE-U-ABORT service are as follows: 7.2.3 SE-P-ABORT service The parameters of the SE-P-ABORT service are a
48、s follows: 8 Sequencing information The only sequencing constraint stipulated in this Service definition is that the invocation of SE-TRANSFER primitives with the same invocation identifier must be consistent with 7.1.2. Parameter Name Req Ind Invocation identifier U C(=) Item identifier U C(=) Erro
49、r list U C(=) Fatality Indicator U C(=) Parameter Name Ind Invocation identifier O Item identifier O Problem code M Fatality Indicator OblankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for prepar
