Use of Transport Layer Security (TLS) in the Extensible Messaging and Presence Protocol (XMPP)
draft-ietf-uta-xmpp-02

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Document Type Active Internet-Draft (uta WG)
Last updated 2014-09-22
Replaces draft-saintandre-xmpp-tls
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Network Working Group                                     P. Saint-Andre
Internet-Draft                                                      &yet
Updates: 6120 (if approved)                                  T. Alkemade
Intended status: Standards Track
Expires: March 26, 2015                               September 22, 2014

 Use of Transport Layer Security (TLS) in the Extensible Messaging and
                        Presence Protocol (XMPP)
                         draft-ietf-uta-xmpp-02

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 Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on March 26, 2015.

Copyright Notice

   Copyright (c) 2014 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
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Recommendations . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Support for TLS . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Protocol Versions . . . . . . . . . . . . . . . . . . . .   3
     3.3.  Cipher Suites . . . . . . . . . . . . . . . . . . . . . .   3
     3.4.  Public Key Length . . . . . . . . . . . . . . . . . . . .   3
     3.5.  Compression . . . . . . . . . . . . . . . . . . . . . . .   3
     3.6.  Session Resumption  . . . . . . . . . . . . . . . . . . .   4
     3.7.  Authenticated Connections . . . . . . . . . . . . . . . .   4
     3.8.  Unauthenticated Connections . . . . . . . . . . . . . . .   4
     3.9.  Server Name Indication  . . . . . . . . . . . . . . . . .   4
     3.10. Human Factors . . . . . . . . . . . . . . . . . . . . . .   5
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Appendix A.  Implementation Notes . . . . . . . . . . . . . . . .   7
   Appendix B.  Acknowledgements . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

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 based
   on [I-D.ietf-uta-tls-bcp].  This document updates [RFC6120].

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].

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3.  Recommendations

3.1.  Support for TLS

   Support for TLS (specifically, the XMPP profile of STARTTLS) is
   mandatory for XMPP implementations, as already specified in [RFC6120]
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