The Session Initiation Protocol (SIP) Digest Authentication Scheme
draft-ietf-sipcore-digest-scheme-02

Document Type Active Internet-Draft (sipcore WG)
Last updated 2019-05-09
Replaces draft-yusef-sipcore-digest-scheme
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SIP Core                                                  R. Shekh-Yusef
Internet-Draft                                                     Avaya
Updates: 3261 (if approved)                                  May 9, 2019
Intended status: Standards Track
Expires: November 10, 2019

   The Session Initiation Protocol (SIP) Digest Authentication Scheme
                  draft-ietf-sipcore-digest-scheme-02

Abstract

   This document updates the Digest Access Authentication scheme used by
   the Session Initiation Protocol (SIP) to add support for secure
   digest algorithms to replace the broken MD5 algorithm.

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 November 10, 2019.

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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
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   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  The Updated SIP Digest Authentication Scheme  . . . . . . . .   3
     2.1.  Hash Algorithms . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Representation of Digest Values . . . . . . . . . . . . .   3
     2.3.  The Authenticate Response Header Field  . . . . . . . . .   4
     2.4.  The Authorization Request Header Field  . . . . . . . . .   4
     2.5.  Forking . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.6.  HTTP Modifications  . . . . . . . . . . . . . . . . . . .   5
     2.7.  Augmented BNF for the SIP Protocol  . . . . . . . . . . .   6
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   The SIP protocol [RFC3261] uses the same mechanism used by the HTTP
   protocol for authenticating users, which is a simple challenge-
   response authentication mechanism that allows a server to challenge a
   client request and allows a client to provide authentication
   information in response to that challenge.

   The SIP protocol uses the Digest Authentication scheme that is used
   with the HTTP authentication mechanism, which by default uses MD5 as
   the default algorithm.

   The HTTP Digest Access Authentication [RFC7616] document defines the
   Digest Authentication scheme and defines a few algorithms that could
   be used with the Digest Authentication scheme, and establishes a
   registry for these algorithms to allow for additional algorithms to
   be added in the future.

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   This document updates the Digest Access Authentication scheme used by
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