Domain Certificates in the Session Initiation Protocol (SIP)
RFC 5922

 
Document Type RFC - Proposed Standard (June 2010; No errata)
Updates RFC 3261
Last updated 2013-03-02
Replaces draft-gurbani-sip-domain-certs
Stream IETF
Formats plain text pdf html
Stream WG state (None)
Consensus Unknown
Document shepherd No shepherd assigned
IESG IESG state RFC 5922 (Proposed Standard)
Telechat date
Responsible AD Robert Sparks
Send notices to scottlawrenc@avaya.com, sip-chairs@ietf.org, draft-ietf-sip-domain-certs@ietf.org
Internet Engineering Task Force (IETF)                        V. Gurbani
Request for Comments: 5922             Bell Laboratories, Alcatel-Lucent
Updates: 3261                                                S. Lawrence
Category: Standards Track
ISSN: 2070-1721                                               A. Jeffrey
                                       Bell Laboratories, Alcatel-Lucent
                                                               June 2010

      Domain Certificates in the Session Initiation Protocol (SIP)

Abstract

   This document describes how to construct and interpret certain
   information in a PKIX-compliant (Public Key Infrastructure using
   X.509) certificate for use in a Session Initiation Protocol (SIP)
   over Transport Layer Security (TLS) connection.  More specifically,
   this document describes how to encode and extract the identity of a
   SIP domain in a certificate and how to use that identity for SIP
   domain authentication.  As such, this document is relevant both to
   implementors of SIP and to issuers of certificates.

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/rfc5922.

Gurbani, et al.              Standards Track                    [Page 1]
RFC 5922                      Domain Certs                     June 2010

Copyright Notice

   Copyright (c) 2010 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.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
      2.1. Key Words ..................................................3
   3. Problem Statement ...............................................3
   4. SIP Domain to Host Resolution ...................................5
   5. The Need for Mutual Interdomain Authentication ..................6
   6. Certificate Usage by a SIP Service Provider .....................7
   7. Behavior of SIP Entities ........................................8
      7.1. Finding SIP Identities in a Certificate ....................8
      7.2. Comparing SIP Identities ...................................9
      7.3. Client Behavior ...........................................10
      7.4. Server Behavior ...........................................11
      7.5. Proxy Behavior ............................................12
      7.6. Registrar Behavior ........................................12
      7.7. Redirect Server Behavior ..................................12
      7.8. Virtual SIP Servers and Certificate Content ...............12
   8. Security Considerations ........................................13
      8.1. Connection Authentication Using Digest ....................13
   9. Acknowledgments ................................................14
   10. References ....................................................14
      10.1. Normative References .....................................14
      10.2. Informative References ...................................15
   Appendix A.  Editorial Guidance (Non-Normative) ...................16
     A.1.  Additions .................................................16
     A.2.  Changes ...................................................16
       A.2.1.  Changes to Section 26.3.1 .............................16

Gurbani, et al.              Standards Track                    [Page 2]
RFC 5922                      Domain Certs                     June 2010

1.  Introduction

   RFC 5246 [5] Transport Layer Security (TLS) is available in an
   increasing number of Session Initiation Protocol (SIP) RFC 3261 [2]
   implementations.  In order to use the authentication capabilities of
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