Session Description Protocol (SDP) Offer/Answer Considerations for Datagram Transport Layer Security (DTLS) and Transport Layer Security (TLS)
RFC 8842
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Document | Type | RFC - Proposed Standard (January 2021; No errata) | |
---|---|---|---|
Authors | Christer Holmberg , Roman Shpount | ||
Last updated | 2021-01-18 | ||
Replaces | draft-holmberg-mmusic-sdp-dtls | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html xml pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Flemming Andreasen | ||
Shepherd write-up | Show (last changed 2017-02-15) | ||
IESG | IESG state | RFC 8842 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Ben Campbell | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) C. Holmberg Request for Comments: 8842 Ericsson Updates: 5763, 7345 R. Shpount Category: Standards Track TurboBridge ISSN: 2070-1721 January 2021 Session Description Protocol (SDP) Offer/Answer Considerations for Datagram Transport Layer Security (DTLS) and Transport Layer Security (TLS) Abstract This document defines the Session Description Protocol (SDP) offer/ answer procedures for negotiating and establishing a Datagram Transport Layer Security (DTLS) association. The document also defines the criteria for when a new DTLS association must be established. The document updates RFCs 5763 and 7345 by replacing common SDP offer/answer procedures with a reference to this specification. This document defines a new SDP media-level attribute, "tls-id". This document also defines how the "tls-id" attribute can be used for negotiating and establishing a Transport Layer Security (TLS) connection, in conjunction with the procedures in RFCs 4145 and 8122. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8842. Copyright Notice Copyright (c) 2021 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction 2. Conventions 3. Establishing a New DTLS Association 3.1. General 3.2. Change of Local Transport Parameters 3.3. Change of ICE ufrag Value 4. SDP "tls-id" Attribute 5. SDP Offer/Answer Procedures 5.1. General 5.2. Generating the Initial SDP Offer 5.3. Generating the Answer 5.4. Offerer Processing of the SDP Answer 5.5. Modifying the Session 6. ICE Considerations 7. TLS Considerations 8. SIP Considerations 9. RFC Updates 9.1. General 9.2. Update to RFC 5763 9.2.1. Update to Section 1 9.2.2. Update to Section 5 9.2.3. Update to Section 6.6 9.2.4. Update to Section 6.7.1 9.3. Update to RFC 7345 9.3.1. Update to Section 4 9.3.2. Update to Section 5.2.1 9.3.3. Update to Section 9.1 10. Security Considerations 11. IANA Considerations 12. References 12.1. Normative References 12.2. Informative References Acknowledgements Authors' Addresses 1. Introduction [RFC5763] defines Session Description Protocol (SDP) offer/answer procedures for Secure Real-time Transport Protocol using Datagram Transport Layer Security (DTLS-SRTP). [RFC7345] defines SDP offer/ answer procedures for UDP Transport Layer over Datagram Transport Layer Security (UDPTL-DTLS). This specification defines general offer/answer procedures for DTLS, based on the procedures in [RFC5763]. Other specifications, defining specific DTLS usages, can then reference this specification, in order to ensure that the DTLS aspects are common among all usages. Having common procedures is essential when multiple usages share the same DTLS association [RFC8843]. This document updates [RFC5763] and [RFC7345] by replacing common SDP offer/answer procedures with a reference to this specification. | NOTE: Since the publication of [RFC5763], [RFC4474] has been | obsoleted by [RFC8224]. The updating of the references (and | the associated procedures) within [RFC5763] is outside the | scope of this document. However, implementers of [RFC5763] | applications are encouraged to implement [RFC8224] instead of | [RFC4474]. As defined in [RFC5763], a new DTLS association MUST be established when transport parameters are changed. Transport parameter change is not well defined when Interactive Connectivity Establishment (ICE)Show full document text