HTTP Digest Access Authentication
draft-ietf-httpauth-digest-18

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Document Type Active Internet-Draft (httpauth WG)
Last updated 2015-04-23 (latest revision 2015-04-10)
Replaces draft-ietf-httpauth-digest-encoding, draft-ietf-httpauth-digest-update
Stream IETF
Intended RFC status Proposed Standard
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IANA IANA review state IANA - Not OK
HTTPAuth                                             R. Shekh-Yusef, Ed.
Internet-Draft                                                     Avaya
Obsoletes: 2617 (if approved)                                  D. Ahrens
Intended status: Standards Track                             Independent
Expires: October 12, 2015                                      S. Bremer
                                                             Netzkonform
                                                          April 10, 2015

                   HTTP Digest Access Authentication
                     draft-ietf-httpauth-digest-18

Abstract

   HTTP provides a simple challenge-response authentication mechanism
   that may be used by a server to challenge a client request and by a
   client to provide authentication information.  This document defines
   the HTTP Digest Authentication scheme that can be used with the HTTP
   authentication mechanism.

Editorial Note (To be removed by RFC Editor before publication)

   Discussion of this draft takes place on the HTTPAuth working group
   mailing list (http-auth@ietf.org), which is archived at [1].

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 October 12, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Shekh-Yusef, et al.     Expires October 12, 2015                [Page 1]
Internet-Draft      HTTP Digest Access Authentication         April 2015

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   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Syntax Convention . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  ABNF  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Digest Access Authentication Scheme . . . . . . . . . . . . .   4
     3.1.  Overall Operation . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Representation of Digest Values . . . . . . . . . . . . .   4
     3.3.  The WWW-Authenticate Response Header Field  . . . . . . .   5
     3.4.  The Authorization Request Header Field  . . . . . . . . .   8
       3.4.1.  Response  . . . . . . . . . . . . . . . . . . . . . .  10
       3.4.2.  A1  . . . . . . . . . . . . . . . . . . . . . . . . .  10
       3.4.3.  A2  . . . . . . . . . . . . . . . . . . . . . . . . .  11
       3.4.4.  Username Hashing  . . . . . . . . . . . . . . . . . .  11
       3.4.5.  Parameter Values and Quoted-String  . . . . . . . . .  12
       3.4.6.  Various Considerations  . . . . . . . . . . . . . . .  12
     3.5.  The Authentication-Info and Proxy-Authentication-Info
           Header Fields . . . . . . . . . . . . . . . . . . . . . .  13
     3.6.  Digest Operation  . . . . . . . . . . . . . . . . . . . .  15
     3.7.  Security Protocol Negotiation . . . . . . . . . . . . . .  16
     3.8.  Proxy-Authenticate and Proxy-Authorization  . . . . . . .  16
     3.9.  Examples  . . . . . . . . . . . . . . . . . . . . . . . .  17
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