Authenticated Identity Management in the Session Initiation Protocol (SIP)
draft-ietf-stir-rfc4474bis-13

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Document Type Active Internet-Draft (stir WG)
Last updated 2016-09-30
Replaces draft-jennings-stir-rfc4474bis
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Network Working Group                                        J. Peterson
Internet-Draft                                                   NeuStar
Obsoletes: 4474 (if approved)                                C. Jennings
Intended status: Standards Track                                   Cisco
Expires: April 2, 2017                                       E. Rescorla
                                                              RTFM, Inc.
                                                                C. Wendt
                                                                 Comcast
                                                      September 29, 2016

  Authenticated Identity Management in the Session Initiation Protocol
                                 (SIP)
                   draft-ietf-stir-rfc4474bis-13.txt

Abstract

   The baseline security mechanisms in the Session Initiation Protocol
   (SIP) are inadequate for cryptographically assuring the identity of
   the end users that originate SIP requests, especially in an
   interdomain context.  This document defines a mechanism for securely
   identifying originators of SIP requests.  It does so by defining a
   SIP header field for conveying a signature used for validating the
   identity, and for conveying a reference to the credentials of the
   signer.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 2, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Peterson, et al.          Expires April 2, 2017                 [Page 1]
Internet-Draft                SIP Identity                September 2016

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   4
   4.  Identity Header Field Syntax  . . . . . . . . . . . . . . . .   6
     4.1.  PASSporT Construction . . . . . . . . . . . . . . . . . .   7
       4.1.1.  Example Full and Compact Forms of PASSporT in
               Identity  . . . . . . . . . . . . . . . . . . . . . .   9
   5.  Example of Operations . . . . . . . . . . . . . . . . . . . .   9
     5.1.  Example Identity Header Construction  . . . . . . . . . .  11
   6.  Signature Generation and Validation . . . . . . . . . . . . .  12
     6.1.  Authentication Service Behavior . . . . . . . . . . . . .  12
       6.1.1.  Handling Repairable Errors  . . . . . . . . . . . . .  15
     6.2.  Verifier Behavior . . . . . . . . . . . . . . . . . . . .  15
       6.2.1.  Authorization of Requests . . . . . . . . . . . . . .  17
       6.2.2.  Failure Response Codes Sent by a Verification Service  18
       6.2.3.  Handling the full form of PASSporT  . . . . . . . . .  19
   7.  Credentials . . . . . . . . . . . . . . . . . . . . . . . . .  19
     7.1.  Credential Use by the Authentication Service  . . . . . .  20
     7.2.  Credential Use by the Verification Service  . . . . . . .  21
     7.3.  'info' parameter URIs . . . . . . . . . . . . . . . . . .  22
     7.4.  Credential System Requirements  . . . . . . . . . . . . .  22
   8.  Identity Types  . . . . . . . . . . . . . . . . . . . . . . .  23
     8.1.  Differentiating Telephone Numbers from URIs . . . . . . .  24
     8.2.  Authority for Telephone Numbers . . . . . . . . . . . . .  25
     8.3.  Telephone Number Canonicalization Procedures  . . . . . .  25
     8.4.  Authority for Domain Names  . . . . . . . . . . . . . . .  26
     8.5.  URI Normalization . . . . . . . . . . . . . . . . . . . .  27
   9.  Extensibility . . . . . . . . . . . . . . . . . . . . . . . .  28
   10. Backwards Compatibility with RFC4474  . . . . . . . . . . . .  29
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