ETSI TS 103 707 V1.1.1 (2020-03)

Lawful Interception (LI); Handover for messaging services over HTTP/XML

DTS/LI-00178

General Information

• Status: Published
• Publication Date: 22-Mar-2020
• Technical Committee: LI - Lawful Interception
• Current Stage: 12 - Completion
• Due Date: 10-Apr-2020
• Completion Date: 23-Mar-2020

Standards Content (Sample)

ETSI TS 103 707 V1.1.1 (2020-03)






TECHNICAL SPECIFICATION
Lawful Interception (LI);
Handover for messaging services over HTTP/XML

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2 ETSI TS 103 707 V1.1.1 (2020-03)



Reference
DTS/LI-00178
Keywords
handover; Lawful Interception
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3 ETSI TS 103 707 V1.1.1 (2020-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Introductory material . 7
4.1 Reference model . 7
4.2 Responsibilities . 8
5 Basic concepts . 8
5.1 General . 8
5.2 Delivery . 9
5.2.1 General . 9
5.2.2 ETSI TS 103 120 Message header . 9
5.2.3 ETSI TS 103 120 Object header . 9
5.3 Application level header . 10
5.3.1 General . 10
5.3.2 ApplicationCorrelation . 10
5.4 Core parameters for messaging . 10
5.4.1 General . 10
5.4.2 MessagingParty . 11
5.4.3 AssociatedBinaryData . 11
5.5 Messaging glossary . 11
5.6 CSP-defined information . 12
5.6.1 General . 12
5.6.2 CSP-defined schema . 12
5.6.3 Use of common types from ETSI TS 103 280 . 12
5.6.4 Including binary data in the CSP-defined content . 13
5.7 Error reporting . 13
6 Transport details . 13
6.1 HTTP details . 13
6.2 Error reporting for transport . 13
7 Security. 13
Annex A (informative): Messaging service identifiers . 14
A.1 Identifiers . 14
Annex B (normative): Messaging XSD definition . 15
Annex C (normative): Content delivery . 16
C.1 General . 16
C.2 Model A . 16
C.3 Model B . 16
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4 ETSI TS 103 707 V1.1.1 (2020-03)
Annex D (informative): Change History . 17
History . 18


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Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Lawful Interception (LI).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document provides the handover details to deliver messaging services for LI over HTTP/XML. Audio and
video streaming and RCS are not in scope of the present document. The CSP may opt to use other standards to facilitate
LI over TCP/ASN.1 as an alternative message format, e.g. ETSI TS 102 232-2 [i.5] (for messaging services) and ETSI
TS 102 232-5 [i.6] (for IP Multimedia Services).

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1 Scope
The present document specifies the handover details to deliver messaging services for LI over HTTP/XML.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 103 120: "Lawful Interception (LI); Interface for warrant information".
[2] IETF RFC 2818: "HTTP Over TLS".
[3] IETF RFC 5246: "The Transport Layer Security (TLS) Protocol Version 1.2".
NOTE: Obsoleted by IETF RFC 8446.
[4] IETF RFC 7525: "Recommendations for Secure Use of Transport Layer Security (TLS) and
Datagram Transport Layer Security (DTLS)".
[5] IETF RFC 8446: "The Transport Layer Security (TLS) Protocol Version 1.3".
[6] IETF RFC 4279: "Pre-Shared Key Ciphersuites for Transport Layer Security (TLS)".
[7] ETSI TS 103 280: "Lawful Interception (LI); Dictionary for common parameters".
[8] IETF RFC 6838: "Media Type Specifications and Registration Procedures".
[9] FIPS Publication 180-4 (2015): "Secure Hash Standard (SHS)".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
user with regard to a particular subject area.
[i.1] Recommendation ITU-T E.164: "The international public telecommunication numbering plan".
[i.2] IETF RFC 5322: "Internet Message Format".
[i.3] IETF RFC 5321: "Simple Mail Transfer Protocol".
[i.4] IETF RFC 3696: "Application Techniques for Checking and Transformation of Names".
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[i.5] ETSI TS 102 232-2: "Lawful Interception (LI); Handover Interface and Service-Specific Details
(SSD) for IP delivery; Part 2: Service-specific details for messaging services".
[i.6] ETSI TS 102 232-5: "Lawful Interception (LI); Handover Interface and Service-Specific Details
(SSD) for IP delivery; Part 5: Service-specific details for IP Multimedia Services".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
messaging service: service which allows users to transfer messages to a finite number of users whereby the persons
initiating or participating in the communications determine its recipient(s)
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CSP Communications Service Provider
HTTP HyperText Transfer Protocol
HTTPS HyperText Transfer Protocol Secure
ID IDentifier
IP Internet Protocol
LEA Law Enforcement Agency
LI Lawful Interception
LIID Lawful Interception IDentifier
MIME Multipurpose Internet Mail Extensions
MSISDN Mobile Station International Subscriber Directory Number
RCS Rich Communication Services
SHA Secure Hash Algorithm
SSL Secure Sockets Layer
TC Technical Committee
TLS Transport Layer Security
URL Uniform Resource Locator
UUID Universally Unique Identifier
XML eXtensible Markup Language
XSD XML Schema Definition
4 Introductory material
4.1 Reference model
This clause provides a Reference Model which applies to request and delivery mechanisms between Law Enforcement
Agencies (LEAs) and Communications Service Providers (CSPs) for the present document.
Request means submission of a request for data and delivery means handover of the material that was identified by the
CSP as meeting the request. Figure 1 shows the reference model.
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Figure 1: Reference model
The LEA/CSP standards should accommodate for a variety of different law enforcement agencies and for a variety of
CSPs. In other words, it is important to support some variance in the internal procedures, processes and data structures.
Such variance should not compromise the establishment of security best-practice.
4.2 Responsibilities
The LEA is responsible for creating a lawful request and the request needs to be clear. The LEA delivers the request to
the CSP. The legal obligation on the CSP (e.g. what has to be delivered, what has to be retained) is managed
independently of the delivery interface and is out of scope of the present document.
The CSP is responsible for the collection of the data within its system, and produces the data using its own capabilities
and entirely under the control of the CSP system. The CSP identifies the data which matches the clear request, and only
that data. The CSP needs to be able to perform a human review of the request and delivered material. The CSP packages
the data, attaches relevant information (e.g. unique reference number, timestamp) and delivers it to the requesting LEA.
Each request is distinct and shall be handled independently of other requests.
5 Basic concepts
5.1 General
The object consists of the following components:
• Application level header (see clause 5.3).
• Core parameters for messaging (see clause 5.4).
• Messaging glossary (see clause 5.5).
• CSP-defined information (see clause 5.6).
The object is delivered using ETSI TS 103 120 [1] as described in clause 5.2.
The following parameter definitions use the terminology of one of the following:
• Mandatory (M): required for every delivery.
• Conditional (C): required in situations where a condition is met (the condition is given in the description).
• Optional (O): provided at the discretion of the implementation.
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5.2 Delivery
5.2.1 General
Handover items are delivered using the DeliveryObject as described in ETSI TS 103 120 [1], clause 10.
The present document does not require the use of any of the tasking components from ETSI TS 103 120 [1]. The
present document does not require the use of national profiles (as per the definition of profiles in ETSI TS 103 120 [1]).
5.2.2 ETSI TS 103 120 Message header
The Message Header fields shall be populated as defined in ETSI TS 103 120 [1], clause 6.2, with the additional
clarifications as shown in Table 1.
Table 1: ETSI TS 103 120 [1] Message Header population
Parameter Description M/O/C
The Sender is the CSP. M

The SenderIdentifier has two components: a CountryCode and a UniqueIdentifier. They
senderIdentifier shall be populated as follows:
• The CSP sha
...