Use of Transport Layer Security (TLS) in the Extensible Messaging and Presence Protocol (XMPP)
RFC 7590

Document Type RFC - Proposed Standard (June 2015; No errata)
Updates RFC 6120
Last updated 2015-10-14
Replaces draft-saintandre-xmpp-tls
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Leif Johansson
Shepherd write-up Show (last changed 2015-03-11)
IESG IESG state RFC 7590 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Stephen Farrell
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                    P. Saint-Andre
Request for Comments: 7590                                          &yet
Updates: 6120                                                T. Alkemade
Category: Standards Track                                      June 2015
ISSN: 2070-1721

              Use of Transport Layer Security (TLS) in the
           Extensible Messaging and Presence Protocol (XMPP)

Abstract

   This document provides recommendations for the use of Transport Layer
   Security (TLS) in the Extensible Messaging and Presence Protocol
   (XMPP).  This document updates RFC 6120.

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 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7590.

Copyright Notice

   Copyright (c) 2015 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
   (http://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.

Saint-Andre & Alkemade       Standards Track                    [Page 1]
RFC 7590                        XMPP TLS                       June 2015

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Recommendations . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Support for TLS . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Compression . . . . . . . . . . . . . . . . . . . . . . .   3
     3.3.  Session Resumption  . . . . . . . . . . . . . . . . . . .   3
     3.4.  Authenticated Connections . . . . . . . . . . . . . . . .   4
     3.5.  Server Name Indication  . . . . . . . . . . . . . . . . .   5
     3.6.  Human Factors . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Implementation Notes . . . . . . . . . . . . . . . .   9
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   The Extensible Messaging and Presence Protocol (XMPP) [RFC6120]
   (along with its precursor, the so-called "Jabber protocol") has used
   Transport Layer Security (TLS) [RFC5246] (along with its precursor,
   Secure Sockets Layer or SSL) since 1999.  Both [RFC6120] and its
   predecessor [RFC3920] provided recommendations regarding the use of
   TLS in XMPP.  In order to address the evolving threat model on the
   Internet today, this document provides stronger recommendations.

   In particular, this document updates [RFC6120] by specifying that
   XMPP implementations and deployments MUST follow the best current
   practices documented in the "Recommendations for Secure Use of TLS
   and DTLS" [RFC7525].  This includes stronger recommendations
   regarding SSL/TLS protocol versions, fallback to lower versions,
   TLS-layer compression, TLS session resumption, cipher suites, public
   key lengths, forward secrecy, and other aspects of using TLS with
   XMPP.

2.  Terminology

   Various security-related terms are to be understood in the sense
   defined in [RFC4949].

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].

Saint-Andre & Alkemade       Standards Track                    [Page 2]
Show full document text