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38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p7-auth-23.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p7-auth-24.txt&nbsp;</th><th></th></tr>
39      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
40      <tr><td class="lineno" valign="top"></td><td class="left">HTTPbis Working Group                                   R. Fielding, Ed.</td><td> </td><td class="right">HTTPbis Working Group                                   R. Fielding, Ed.</td><td class="lineno" valign="top"></td></tr>
41      <tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft                                                     Adobe</td><td> </td><td class="right">Internet-Draft                                                     Adobe</td><td class="lineno" valign="top"></td></tr>
42      <tr><td class="lineno" valign="top"></td><td class="left">Obsoletes: 2616 (if approved)                            J. Reschke, Ed.</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                            J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Updates: 2617 (if approved)                                   greenbytes</td><td> </td><td class="right">Updates: 2617 (if approved)                                   greenbytes</td><td class="lineno" valign="top"></td></tr>
44      <tr><td><a name="diff0001" /></td></tr>
45      <tr><td class="lineno" valign="top"></td><td class="lblock">Intended status: Standards Track                           <span class="delete">July 15,</span> 2013</td><td> </td><td class="rblock">Intended status: Standards Track                      <span class="insert">September 25,</span> 2013</td><td class="lineno" valign="top"></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">January 16,</span> 2014</td><td> </td><td class="rblock">Expires: <span class="insert">March 29,</span> 2014</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="left">         Hypertext Transfer Protocol (HTTP/1.1): Authentication</td><td> </td><td class="right">         Hypertext Transfer Protocol (HTTP/1.1): Authentication</td><td class="lineno" valign="top"></td></tr>
49      <tr><td><a name="diff0002" /></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p7-auth-2<span class="delete">3</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p7-auth-2<span class="insert">4</span></td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td> </td><td class="right">   The Hypertext Transfer Protocol (HTTP) is an application-level</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">   protocol for distributed, collaborative, hypermedia information</td><td> </td><td class="right">   protocol for distributed, collaborative, hypermedia information</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  This document defines the HTTP Authentication framework.</td><td> </td><td class="right">   systems.  This document defines the HTTP Authentication framework.</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">Editorial Note (To be removed by RFC Editor)</td><td> </td><td class="right">Editorial Note (To be removed by RFC Editor)</td><td class="lineno" valign="top"></td></tr>
59      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft takes place on the HTTPBIS working group</td><td> </td><td class="right">   Discussion of this draft takes place on the HTTPBIS working group</td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="left">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td> </td><td class="right">   mailing list (ietf-http-wg@w3.org), which is archived at</td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td> </td><td class="right">   &lt;http://lists.w3.org/Archives/Public/ietf-http-wg/&gt;.</td><td class="lineno" valign="top"></td></tr>
63      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="left">   The current issues list is at</td><td> </td><td class="right">   The current issues list is at</td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/trac/report/3&gt; and related</td><td class="lineno" valign="top"></td></tr>
66      <tr><td class="lineno" valign="top"></td><td class="left">   documents (including fancy diffs) can be found at</td><td> </td><td class="right">   documents (including fancy diffs) can be found at</td><td class="lineno" valign="top"></td></tr>
67      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td> </td><td class="right">   &lt;http://tools.ietf.org/wg/httpbis/&gt;.</td><td class="lineno" valign="top"></td></tr>
68      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
69      <tr><td><a name="diff0003" /></td></tr>
70      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix D.<span class="delete">4</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix D.<span class="insert">5</span>.</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">Status of This Memo</td><td> </td><td class="right">Status of This Memo</td><td class="lineno" valign="top"></td></tr>
73      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="left">   This Internet-Draft is submitted in full conformance with the</td><td> </td><td class="right">   This Internet-Draft is submitted in full conformance with the</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="left">   provisions of BCP 78 and BCP 79.</td><td> </td><td class="right">   provisions of BCP 78 and BCP 79.</td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right">   Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
78      <tr><td class="lineno" valign="top"></td><td class="left">   Task Force (IETF).  Note that other groups may also distribute</td><td> </td><td class="right">   Task Force (IETF).  Note that other groups may also distribute</td><td class="lineno" valign="top"></td></tr>
79      <tr><td class="lineno" valign="top"></td><td class="left">   working documents as Internet-Drafts.  The list of current Internet-</td><td> </td><td class="right">   working documents as Internet-Drafts.  The list of current Internet-</td><td class="lineno" valign="top"></td></tr>
80      <tr><td class="lineno" valign="top"></td><td class="left">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td> </td><td class="right">   Drafts is at http://datatracker.ietf.org/drafts/current/.</td><td class="lineno" valign="top"></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
82      <tr><td class="lineno" valign="top"></td><td class="left">   Internet-Drafts are draft documents valid for a maximum of six months</td><td> </td><td class="right">   Internet-Drafts are draft documents valid for a maximum of six months</td><td class="lineno" valign="top"></td></tr>
83      <tr><td class="lineno" valign="top"></td><td class="left">   and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right">   and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
84      <tr><td class="lineno" valign="top"></td><td class="left">   time.  It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right">   time.  It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
85      <tr><td class="lineno" valign="top"></td><td class="left">   material or to cite them other than as "work in progress."</td><td> </td><td class="right">   material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
86      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
87      <tr><td><a name="diff0004" /></td></tr>
88      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on <span class="delete">January 16</span>, 2014.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">March 29</span>, 2014.</td><td class="lineno" valign="top"></td></tr>
89      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
91      <tr><td class="lineno" valign="top"></td><td class="left">   Copyright (c) 2013 IETF Trust and the persons identified as the</td><td> </td><td class="right">   Copyright (c) 2013 IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
92      <tr><td class="lineno" valign="top"></td><td class="left">   document authors.  All rights reserved.</td><td> </td><td class="right">   document authors.  All rights reserved.</td><td class="lineno" valign="top"></td></tr>
93      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
94      <tr><td class="lineno" valign="top"></td><td class="left">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td> </td><td class="right">   This document is subject to BCP 78 and the IETF Trust's Legal</td><td class="lineno" valign="top"></td></tr>
95      <tr><td class="lineno" valign="top"></td><td class="left">   Provisions Relating to IETF Documents</td><td> </td><td class="right">   Provisions Relating to IETF Documents</td><td class="lineno" valign="top"></td></tr>
96      <tr><td class="lineno" valign="top"></td><td class="left">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td> </td><td class="right">   (http://trustee.ietf.org/license-info) in effect on the date of</td><td class="lineno" valign="top"></td></tr>
97      <tr><td class="lineno" valign="top"></td><td class="left">   publication of this document.  Please review these documents</td><td> </td><td class="right">   publication of this document.  Please review these documents</td><td class="lineno" valign="top"></td></tr>
98      <tr><td class="lineno" valign="top"></td><td class="left">   carefully, as they describe your rights and restrictions with respect</td><td> </td><td class="right">   carefully, as they describe your rights and restrictions with respect</td><td class="lineno" valign="top"></td></tr>
99      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
100      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 3, line 43</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 3, line 43</em></th><td></td></tr>
101      <tr><td class="lineno" valign="top"></td><td class="left">     8.2.  Informative References . . . . . . . . . . . . . . . . . . 14</td><td> </td><td class="right">     8.2.  Informative References . . . . . . . . . . . . . . . . . . 14</td><td class="lineno" valign="top"></td></tr>
102      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix A.  Changes from RFCs 2616 and 2617 . . . . . . . . . . . 15</td><td> </td><td class="right">   Appendix A.  Changes from RFCs 2616 and 2617 . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
103      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 15</td><td> </td><td class="right">   Appendix B.  Imported ABNF . . . . . . . . . . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
104      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 15</td><td> </td><td class="right">   Appendix C.  Collected ABNF  . . . . . . . . . . . . . . . . . . . 15</td><td class="lineno" valign="top"></td></tr>
105      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix D.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
106      <tr><td class="lineno" valign="top"></td><td class="left">                publication)  . . . . . . . . . . . . . . . . . . . . 16</td><td> </td><td class="right">                publication)  . . . . . . . . . . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
107      <tr><td class="lineno" valign="top"></td><td class="left">     D.1.  Since draft-ietf-httpbis-p7-auth-19  . . . . . . . . . . . 16</td><td> </td><td class="right">     D.1.  Since draft-ietf-httpbis-p7-auth-19  . . . . . . . . . . . 16</td><td class="lineno" valign="top"></td></tr>
108      <tr><td class="lineno" valign="top"></td><td class="left">     D.2.  Since draft-ietf-httpbis-p7-auth-20  . . . . . . . . . . . 17</td><td> </td><td class="right">     D.2.  Since draft-ietf-httpbis-p7-auth-20  . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
109      <tr><td class="lineno" valign="top"></td><td class="left">     D.3.  Since draft-ietf-httpbis-p7-auth-21  . . . . . . . . . . . 17</td><td> </td><td class="right">     D.3.  Since draft-ietf-httpbis-p7-auth-21  . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
110      <tr><td class="lineno" valign="top"></td><td class="left">     D.4.  Since draft-ietf-httpbis-p7-auth-22  . . . . . . . . . . . 17</td><td> </td><td class="right">     D.4.  Since draft-ietf-httpbis-p7-auth-22  . . . . . . . . . . . 17</td><td class="lineno" valign="top"></td></tr>
111      <tr><td><a name="diff0005" /></td></tr>
112      <tr><td class="lineno" valign="top"></td><td class="lblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">17</span></td><td> </td><td class="rblock">     <span class="insert">D.5.  Since draft-ietf-httpbis-p7-auth-23  . . . . . . . . . . . 17</span></td><td class="lineno" valign="top"></td></tr>
113      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">18</span></td><td class="lineno" valign="top"></td></tr>
114      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
115      <tr><td class="lineno" valign="top"></td><td class="left">1.  Introduction</td><td> </td><td class="right">1.  Introduction</td><td class="lineno" valign="top"></td></tr>
116      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
117      <tr><td class="lineno" valign="top"></td><td class="left">   This document defines HTTP/1.1 access control and authentication.  It</td><td> </td><td class="right">   This document defines HTTP/1.1 access control and authentication.  It</td><td class="lineno" valign="top"></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="left">   includes the relevant parts of RFC 2616 with only minor changes</td><td> </td><td class="right">   includes the relevant parts of RFC 2616 with only minor changes</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left">   ([RFC2616]), plus the general framework for HTTP authentication, as</td><td> </td><td class="right">   ([RFC2616]), plus the general framework for HTTP authentication, as</td><td class="lineno" valign="top"></td></tr>
120      <tr><td class="lineno" valign="top"></td><td class="left">   previously defined in "HTTP Authentication: Basic and Digest Access</td><td> </td><td class="right">   previously defined in "HTTP Authentication: Basic and Digest Access</td><td class="lineno" valign="top"></td></tr>
121      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication" ([RFC2617]).</td><td> </td><td class="right">   Authentication" ([RFC2617]).</td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
123      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP provides several OPTIONAL challenge-response authentication</td><td> </td><td class="right">   HTTP provides several OPTIONAL challenge-response authentication</td><td class="lineno" valign="top"></td></tr>
124      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
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126      <tr><td class="lineno" valign="top"></td><td class="left">   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this</td><td> </td><td class="right">   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this</td><td class="lineno" valign="top"></td></tr>
127      <tr><td class="lineno" valign="top"></td><td class="left">   document are to be interpreted as described in [RFC2119].</td><td> </td><td class="right">   document are to be interpreted as described in [RFC2119].</td><td class="lineno" valign="top"></td></tr>
128      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
129      <tr><td class="lineno" valign="top"></td><td class="left">   Conformance criteria and considerations regarding error handling are</td><td> </td><td class="right">   Conformance criteria and considerations regarding error handling are</td><td class="lineno" valign="top"></td></tr>
130      <tr><td class="lineno" valign="top"></td><td class="left">   defined in Section 2.5 of [Part1].</td><td> </td><td class="right">   defined in Section 2.5 of [Part1].</td><td class="lineno" valign="top"></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">1.2.  Syntax Notation</td><td> </td><td class="right">1.2.  Syntax Notation</td><td class="lineno" valign="top"></td></tr>
133      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
134      <tr><td class="lineno" valign="top"></td><td class="left">   This specification uses the Augmented Backus-Naur Form (ABNF)</td><td> </td><td class="right">   This specification uses the Augmented Backus-Naur Form (ABNF)</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left">   notation of [RFC5234] with the list rule extension defined in Section</td><td> </td><td class="right">   notation of [RFC5234] with the list rule extension defined in Section</td><td class="lineno" valign="top"></td></tr>
136      <tr><td><a name="diff0006" /></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">1.2</span> of [Part1].  Appendix B describes rules imported from other</td><td> </td><td class="rblock">   <span class="insert">7</span> of [Part1].  Appendix B describes rules imported from other</td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left">   documents.  Appendix C shows the collected ABNF with the list rule</td><td> </td><td class="right">   documents.  Appendix C shows the collected ABNF with the list rule</td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="left">   expanded.</td><td> </td><td class="right">   expanded.</td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
141      <tr><td class="lineno" valign="top"></td><td class="left">2.  Access Authentication Framework</td><td> </td><td class="right">2.  Access Authentication Framework</td><td class="lineno" valign="top"></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="left">2.1.  Challenge and Response</td><td> </td><td class="right">2.1.  Challenge and Response</td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP provides a simple challenge-response authentication framework</td><td> </td><td class="right">   HTTP provides a simple challenge-response authentication framework</td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="left">   that can be used by a server to challenge a client request and by a</td><td> </td><td class="right">   that can be used by a server to challenge a client request and by a</td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="left">   client to provide authentication information.  It uses a case-</td><td> </td><td class="right">   client to provide authentication information.  It uses a case-</td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
149      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 6, line 36</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 6, line 36</em></th><td></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="left">   gain access, ought to respond with the 403 (Forbidden) status code</td><td> </td><td class="right">   gain access, ought to respond with the 403 (Forbidden) status code</td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="left">   (Section 6.5.3 of [Part2]).</td><td> </td><td class="right">   (Section 6.5.3 of [Part2]).</td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="left">   The HTTP protocol does not restrict applications to this simple</td><td> </td><td class="right">   The HTTP protocol does not restrict applications to this simple</td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="left">   challenge-response framework for access authentication.  Additional</td><td> </td><td class="right">   challenge-response framework for access authentication.  Additional</td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms MAY be used, such as encryption at the transport level or</td><td> </td><td class="right">   mechanisms MAY be used, such as encryption at the transport level or</td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="left">   via message encapsulation, and with additional header fields</td><td> </td><td class="right">   via message encapsulation, and with additional header fields</td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="left">   specifying authentication information.  However, such additional</td><td> </td><td class="right">   specifying authentication information.  However, such additional</td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="left">   mechanisms are not defined by this specification.</td><td> </td><td class="right">   mechanisms are not defined by this specification.</td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
160      <tr><td><a name="diff0007" /></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">Proxies</span> MUST forward the WWW-Authenticate and Authorization header</td><td> </td><td class="rblock">   <span class="insert">A proxy</span> MUST forward the WWW-Authenticate and Authorization header</td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="left">   fields unmodified and follow the rules found in Section 4.1.</td><td> </td><td class="right">   fields unmodified and follow the rules found in Section 4.1.</td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="left">2.2.  Protection Space (Realm)</td><td> </td><td class="right">2.2.  Protection Space (Realm)</td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="left">   The authentication parameter realm is reserved for use by</td><td> </td><td class="right">   The authentication parameter realm is reserved for use by</td><td class="lineno" valign="top"></td></tr>
167      <tr><td class="lineno" valign="top"></td><td class="left">   authentication schemes that wish to indicate the scope of protection.</td><td> </td><td class="right">   authentication schemes that wish to indicate the scope of protection.</td><td class="lineno" valign="top"></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="left">   A protection space is defined by the canonical root URI (the scheme</td><td> </td><td class="right">   A protection space is defined by the canonical root URI (the scheme</td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="left">   and authority components of the effective request URI; see Section</td><td> </td><td class="right">   and authority components of the effective request URI; see Section</td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="left">   5.5 of [Part1]) of the server being accessed, in combination with the</td><td> </td><td class="right">   5.5 of [Part1]) of the server being accessed, in combination with the</td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="left">   realm value if present.  These realms allow the protected resources</td><td> </td><td class="right">   realm value if present.  These realms allow the protected resources</td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="left">   on a server to be partitioned into a set of protection spaces, each</td><td> </td><td class="right">   on a server to be partitioned into a set of protection spaces, each</td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="left">   with its own authentication scheme and/or authorization database.</td><td> </td><td class="right">   with its own authentication scheme and/or authorization database.</td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="left">   The realm value is a string, generally assigned by the origin server,</td><td> </td><td class="right">   The realm value is a string, generally assigned by the origin server,</td><td class="lineno" valign="top"></td></tr>
176      <tr><td><a name="diff0008" /></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">that</span> can have additional semantics specific to the authentication</td><td> </td><td class="rblock">   <span class="insert">which</span> can have additional semantics specific to the authentication</td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="left">   scheme.  Note that a response can have multiple challenges with the</td><td> </td><td class="right">   scheme.  Note that a response can have multiple challenges with the</td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="left">   same auth-scheme but different realms.</td><td> </td><td class="right">   same auth-scheme but different realms.</td><td class="lineno" valign="top"></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="left">   The protection space determines the domain over which credentials can</td><td> </td><td class="right">   The protection space determines the domain over which credentials can</td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="left">   be automatically applied.  If a prior request has been authorized,</td><td> </td><td class="right">   be automatically applied.  If a prior request has been authorized,</td><td class="lineno" valign="top"></td></tr>
183      <tr><td><a name="diff0009" /></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="lblock">   the same credentials <span class="delete">MAY be reused</span> for all other requests within that</td><td> </td><td class="rblock">   the <span class="insert">user agent MAY reuse the</span> same credentials for all other requests</td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="lblock">   protection space for a period of time determined by the</td><td> </td><td class="rblock">   within that protection space for a period of time determined by the</td><td class="lineno" valign="top"></td></tr>
186      <tr><td class="lineno" valign="top"></td><td class="left">   authentication scheme, parameters, and/or user preference.  Unless</td><td> </td><td class="right">   authentication scheme, parameters, and/or user preference.  Unless</td><td class="lineno" valign="top"></td></tr>
187      <tr><td class="lineno" valign="top"></td><td class="left">   specifically allowed by the authentication scheme, a single</td><td> </td><td class="right">   specifically allowed by the authentication scheme, a single</td><td class="lineno" valign="top"></td></tr>
188      <tr><td class="lineno" valign="top"></td><td class="left">   protection space cannot extend outside the scope of its server.</td><td> </td><td class="right">   protection space cannot extend outside the scope of its server.</td><td class="lineno" valign="top"></td></tr>
189      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
190      <tr><td><a name="diff0010" /></td></tr>
191      <tr><td class="lineno" valign="top"></td><td class="lblock">   For historical reasons, <span class="delete">senders</span> MUST only generate the quoted-string</td><td> </td><td class="rblock">   For historical reasons, <span class="insert">a sender</span> MUST only generate the quoted-string</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="left">   syntax.  Recipients might have to support both token and quoted-</td><td> </td><td class="right">   syntax.  Recipients might have to support both token and quoted-</td><td class="lineno" valign="top"></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="left">   string syntax for maximum interoperability with existing clients that</td><td> </td><td class="right">   string syntax for maximum interoperability with existing clients that</td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="left">   have been accepting both notations for a long time.</td><td> </td><td class="right">   have been accepting both notations for a long time.</td><td class="lineno" valign="top"></td></tr>
195      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
196      <tr><td class="lineno" valign="top"></td><td class="left">3.  Status Code Definitions</td><td> </td><td class="right">3.  Status Code Definitions</td><td class="lineno" valign="top"></td></tr>
197      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
198      <tr><td class="lineno" valign="top"></td><td class="left">3.1.  401 Unauthorized</td><td> </td><td class="right">3.1.  401 Unauthorized</td><td class="lineno" valign="top"></td></tr>
199      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
200      <tr><td class="lineno" valign="top"></td><td class="left">   The 401 (Unauthorized) status code indicates that the request has not</td><td> </td><td class="right">   The 401 (Unauthorized) status code indicates that the request has not</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left">   been applied because it lacks valid authentication credentials for</td><td> </td><td class="right">   been applied because it lacks valid authentication credentials for</td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
203      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 8, line 10</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 8, line 10</em></th><td></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="left">4.  Header Field Definitions</td><td> </td><td class="right">4.  Header Field Definitions</td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
206      <tr><td class="lineno" valign="top"></td><td class="left">   This section defines the syntax and semantics of HTTP/1.1 header</td><td> </td><td class="right">   This section defines the syntax and semantics of HTTP/1.1 header</td><td class="lineno" valign="top"></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="left">   fields related to authentication.</td><td> </td><td class="right">   fields related to authentication.</td><td class="lineno" valign="top"></td></tr>
208      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
209      <tr><td class="lineno" valign="top"></td><td class="left">4.1.  Authorization</td><td> </td><td class="right">4.1.  Authorization</td><td class="lineno" valign="top"></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left">   The "Authorization" header field allows a user agent to authenticate</td><td> </td><td class="right">   The "Authorization" header field allows a user agent to authenticate</td><td class="lineno" valign="top"></td></tr>
212      <tr><td class="lineno" valign="top"></td><td class="left">   itself with an origin server -- usually, but not necessarily, after</td><td> </td><td class="right">   itself with an origin server -- usually, but not necessarily, after</td><td class="lineno" valign="top"></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="left">   receiving a 401 (Unauthorized) response.  Its value consists of</td><td> </td><td class="right">   receiving a 401 (Unauthorized) response.  Its value consists of</td><td class="lineno" valign="top"></td></tr>
214      <tr><td><a name="diff0011" /></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="lblock">   credentials containing information of the user agent for the realm of</td><td> </td><td class="rblock">   credentials containing <span class="insert">the authentication</span> information of the user</td><td class="lineno" valign="top"></td></tr>
216      <tr><td class="lineno" valign="top"></td><td class="lblock">   the resource being requested.</td><td> </td><td class="rblock">   agent for the realm of the resource being requested.</td><td class="lineno" valign="top"></td></tr>
217      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="left">     Authorization = credentials</td><td> </td><td class="right">     Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
219      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
220      <tr><td class="lineno" valign="top"></td><td class="left">   If a request is authenticated and a realm specified, the same</td><td> </td><td class="right">   If a request is authenticated and a realm specified, the same</td><td class="lineno" valign="top"></td></tr>
221      <tr><td><a name="diff0012" /></td></tr>
222      <tr><td class="lineno" valign="top"></td><td class="lblock">   credentials <span class="delete">SHOULD</span> be valid for all other requests within this realm</td><td> </td><td class="rblock">   credentials <span class="insert">are presumed to</span> be valid for all other requests within</td><td class="lineno" valign="top"></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="lblock">   (assuming that the authentication scheme itself does not require</td><td> </td><td class="rblock">   this realm (assuming that the authentication scheme itself does not</td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="lblock">   otherwise, such as credentials that vary according to a challenge</td><td> </td><td class="rblock">   require otherwise, such as credentials that vary according to a</td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="lblock">   value or using synchronized clocks).</td><td> </td><td class="rblock">   challenge value or using synchronized clocks).</td><td class="lineno" valign="top"></td></tr>
226      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
227      <tr><td class="lineno" valign="top"></td><td class="left">   See Section 3.2 of [Part6] for details of and requirements pertaining</td><td> </td><td class="right">   See Section 3.2 of [Part6] for details of and requirements pertaining</td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   to handling of the Authorization field by HTTP caches.</td><td> </td><td class="right">   to handling of the Authorization field by HTTP caches.</td><td class="lineno" valign="top"></td></tr>
229      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="left">4.2.  Proxy-Authenticate</td><td> </td><td class="right">4.2.  Proxy-Authenticate</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="left">   The "Proxy-Authenticate" header field consists of at least one</td><td> </td><td class="right">   The "Proxy-Authenticate" header field consists of at least one</td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="left">   challenge that indicates the authentication scheme(s) and parameters</td><td> </td><td class="right">   challenge that indicates the authentication scheme(s) and parameters</td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the proxy for this effective request URI (Section 5.5</td><td> </td><td class="right">   applicable to the proxy for this effective request URI (Section 5.5</td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left">   of [Part1]).  It MUST be included as part of a 407 (Proxy</td><td> </td><td class="right">   of [Part1]).  It MUST be included as part of a 407 (Proxy</td><td class="lineno" valign="top"></td></tr>
236      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication Required) response.</td><td> </td><td class="right">   Authentication Required) response.</td><td class="lineno" valign="top"></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="left">     Proxy-Authenticate = 1#challenge</td><td> </td><td class="right">     Proxy-Authenticate = 1#challenge</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="left">   Unlike WWW-Authenticate, the Proxy-Authenticate header field applies</td><td> </td><td class="right">   Unlike WWW-Authenticate, the Proxy-Authenticate header field applies</td><td class="lineno" valign="top"></td></tr>
241      <tr><td><a name="diff0013" /></td></tr>
242      <tr><td class="lineno" valign="top"></td><td class="lblock">   only to the <span class="delete">current connection, and intermediaries SHOULD NOT forward</span></td><td> </td><td class="rblock">   only to the <span class="insert">next outbound client on the response chain that chose to</span></td><td class="lineno" valign="top"></td></tr>
243      <tr><td class="lineno" valign="top"></td><td class="lblock">   it to <span class="delete">downstream</span> clients.  However, <span class="delete">an intermediate</span> proxy <span class="delete">might need</span></td><td> </td><td class="rblock"><span class="insert">   direct its request to the responding proxy.  If that recipient is</span></td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="lblock">   to obtain its own credentials by requesting them from <span class="delete">the downstream</span></td><td> </td><td class="rblock"><span class="insert">   also a proxy,</span> it <span class="insert">will generally consume the Proxy-Authenticate header</span></td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="lblock">   client, <span class="delete">which in some circumstances</span> will <span class="delete">appear as if</span> the <span class="delete">proxy is</span></td><td> </td><td class="rblock"><span class="insert">   field (and generate an appropriate Proxy-Authorization in a</span></td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="lblock">   forwarding the Proxy-Authenticate header <span class="delete">field.</span></td><td> </td><td class="rblock"><span class="insert">   subsequent request) rather than forward the header field</span> to <span class="insert">its own</span></td><td class="lineno" valign="top"></td></tr>
247      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   outbound</span> clients.  However, <span class="insert">if a recipient</span> proxy <span class="insert">needs</span> to obtain its</td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   own credentials by requesting them from <span class="insert">a further outbound</span> client, <span class="insert">it</span></td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   will <span class="insert">generate its own 407 response, which might have</span> the <span class="insert">appearance</span></td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   of</span> forwarding the Proxy-Authenticate header <span class="insert">field if both proxies use</span></td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   the same challenge set.</span></td><td class="lineno" valign="top"></td></tr>
252      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="left">   Note that the parsing considerations for WWW-Authenticate apply to</td><td> </td><td class="right">   Note that the parsing considerations for WWW-Authenticate apply to</td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="left">   this header field as well; see Section 4.4 for details.</td><td> </td><td class="right">   this header field as well; see Section 4.4 for details.</td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="left">4.3.  Proxy-Authorization</td><td> </td><td class="right">4.3.  Proxy-Authorization</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left">   The "Proxy-Authorization" header field allows the client to identify</td><td> </td><td class="right">   The "Proxy-Authorization" header field allows the client to identify</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno" valign="top"></td><td class="left">   itself (or its user) to a proxy that requires authentication.  Its</td><td> </td><td class="right">   itself (or its user) to a proxy that requires authentication.  Its</td><td class="lineno" valign="top"></td></tr>
260      <tr><td class="lineno" valign="top"></td><td class="left">   value consists of credentials containing the authentication</td><td> </td><td class="right">   value consists of credentials containing the authentication</td><td class="lineno" valign="top"></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="left">   information of the client for the proxy and/or realm of the resource</td><td> </td><td class="right">   information of the client for the proxy and/or realm of the resource</td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="left">   being requested.</td><td> </td><td class="right">   being requested.</td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
264      <tr><td class="lineno" valign="top"></td><td class="left">     Proxy-Authorization = credentials</td><td> </td><td class="right">     Proxy-Authorization = credentials</td><td class="lineno" valign="top"></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="left">   Unlike Authorization, the Proxy-Authorization header field applies</td><td> </td><td class="right">   Unlike Authorization, the Proxy-Authorization header field applies</td><td class="lineno" valign="top"></td></tr>
267      <tr><td><a name="diff0014" /></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="lblock">   only to the next <span class="delete">outbound</span> proxy that demanded authentication using</td><td> </td><td class="rblock">   only to the next <span class="insert">inbound</span> proxy that demanded authentication using the</td><td class="lineno" valign="top"></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="lblock">   the Proxy-Authenticate field.  When multiple proxies are used in a</td><td> </td><td class="rblock">   Proxy-Authenticate field.  When multiple proxies are used in a chain,</td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="lblock">   chain, the Proxy-Authorization header field is consumed by the first</td><td> </td><td class="rblock">   the Proxy-Authorization header field is consumed by the first <span class="insert">inbound</span></td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">outbound</span> proxy that was expecting to receive credentials.  A proxy</td><td> </td><td class="rblock">   proxy that was expecting to receive credentials.  A proxy MAY relay</td><td class="lineno" valign="top"></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="lblock">   MAY relay the credentials from the client request to the next proxy</td><td> </td><td class="rblock">   the credentials from the client request to the next proxy if that is</td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="lblock">   if that is the mechanism by which the proxies cooperatively</td><td> </td><td class="rblock">   the mechanism by which the proxies cooperatively authenticate a given</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="lblock">   authenticate a given request.</td><td> </td><td class="rblock">   request.</td><td class="lineno" valign="top"></td></tr>
275      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="left">4.4.  WWW-Authenticate</td><td> </td><td class="right">4.4.  WWW-Authenticate</td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="left">   The "WWW-Authenticate" header field consists of at least one</td><td> </td><td class="right">   The "WWW-Authenticate" header field consists of at least one</td><td class="lineno" valign="top"></td></tr>
279      <tr><td class="lineno" valign="top"></td><td class="left">   challenge that indicates the authentication scheme(s) and parameters</td><td> </td><td class="right">   challenge that indicates the authentication scheme(s) and parameters</td><td class="lineno" valign="top"></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the effective request URI (Section 5.5 of [Part1]).</td><td> </td><td class="right">   applicable to the effective request URI (Section 5.5 of [Part1]).</td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="left">   It MUST be included in 401 (Unauthorized) response messages and MAY</td><td> </td><td class="right">   It MUST be included in 401 (Unauthorized) response messages and MAY</td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="left">   be included in other response messages to indicate that supplying</td><td> </td><td class="right">   be included in other response messages to indicate that supplying</td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="left">   credentials (or different credentials) might affect the response.</td><td> </td><td class="right">   credentials (or different credentials) might affect the response.</td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
286      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 11, line 30</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 11, line 33</em></th><td></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="left">      defining new parameters (such as "update the specification", or</td><td> </td><td class="right">      defining new parameters (such as "update the specification", or</td><td class="lineno" valign="top"></td></tr>
288      <tr><td class="lineno" valign="top"></td><td class="left">      "use this registry").</td><td> </td><td class="right">      "use this registry").</td><td class="lineno" valign="top"></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="left">   o  Authentication schemes need to document whether they are usable in</td><td> </td><td class="right">   o  Authentication schemes need to document whether they are usable in</td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno" valign="top"></td><td class="left">      origin-server authentication (i.e., using WWW-Authenticate),</td><td> </td><td class="right">      origin-server authentication (i.e., using WWW-Authenticate),</td><td class="lineno" valign="top"></td></tr>
292      <tr><td class="lineno" valign="top"></td><td class="left">      and/or proxy authentication (i.e., using Proxy-Authenticate).</td><td> </td><td class="right">      and/or proxy authentication (i.e., using Proxy-Authenticate).</td><td class="lineno" valign="top"></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="left">   o  The credentials carried in an Authorization header field are</td><td> </td><td class="right">   o  The credentials carried in an Authorization header field are</td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="left">      specific to the User Agent, and therefore have the same effect on</td><td> </td><td class="right">      specific to the User Agent, and therefore have the same effect on</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="left">      HTTP caches as the "private" Cache-Control response directive</td><td> </td><td class="right">      HTTP caches as the "private" Cache-Control response directive</td><td class="lineno" valign="top"></td></tr>
297      <tr><td><a name="diff0015" /></td></tr>
298      <tr><td class="lineno" valign="top"></td><td class="lblock">      (Section <span class="delete">7</span>.2.2.6 of [Part6]), within the scope of the request they</td><td> </td><td class="rblock">      (Section <span class="insert">5</span>.2.2.6 of [Part6]), within the scope of the request they</td><td class="lineno" valign="top"></td></tr>
299      <tr><td class="lineno" valign="top"></td><td class="left">      appear in.</td><td> </td><td class="right">      appear in.</td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="left">      Therefore, new authentication schemes that choose not to carry</td><td> </td><td class="right">      Therefore, new authentication schemes that choose not to carry</td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="left">      credentials in the Authorization header field (e.g., using a newly</td><td> </td><td class="right">      credentials in the Authorization header field (e.g., using a newly</td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="left">      defined header field) will need to explicitly disallow caching, by</td><td> </td><td class="right">      defined header field) will need to explicitly disallow caching, by</td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="left">      mandating the use of either Cache-Control request directives</td><td> </td><td class="right">      mandating the use of either Cache-Control request directives</td><td class="lineno" valign="top"></td></tr>
305      <tr><td><a name="diff0016" /></td></tr>
306      <tr><td class="lineno" valign="top"></td><td class="lblock">      (e.g., "no-store", Section <span class="delete">7</span>.2.1.5 of [Part6]) or response</td><td> </td><td class="rblock">      (e.g., "no-store", Section <span class="insert">5</span>.2.1.5 of [Part6]) or response</td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="left">      directives (e.g., "private").</td><td> </td><td class="right">      directives (e.g., "private").</td><td class="lineno" valign="top"></td></tr>
308      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="left">5.2.  Status Code Registration</td><td> </td><td class="right">5.2.  Status Code Registration</td><td class="lineno" valign="top"></td></tr>
310      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="left">   The HTTP Status Code Registry located at</td><td> </td><td class="right">   The HTTP Status Code Registry located at</td><td class="lineno" valign="top"></td></tr>
312      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://www.iana.org/assignments/http-status-codes&gt; shall be updated</td><td> </td><td class="right">   &lt;http://www.iana.org/assignments/http-status-codes&gt; shall be updated</td><td class="lineno" valign="top"></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="left">   with the registrations below:</td><td> </td><td class="right">   with the registrations below:</td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
315      <tr><td class="lineno" valign="top"></td><td class="left">   +-------+-------------------------------+-------------+</td><td> </td><td class="right">   +-------+-------------------------------+-------------+</td><td class="lineno" valign="top"></td></tr>
316      <tr><td class="lineno" valign="top"></td><td class="left">   | Value | Description                   | Reference   |</td><td> </td><td class="right">   | Value | Description                   | Reference   |</td><td class="lineno" valign="top"></td></tr>
317      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
318      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 12, line 44</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 12, line 44</em></th><td></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="left">6.  Security Considerations</td><td> </td><td class="right">6.  Security Considerations</td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="left">   This section is meant to inform developers, information providers,</td><td> </td><td class="right">   This section is meant to inform developers, information providers,</td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="left">   and users of known security concerns specific to HTTP/1.1</td><td> </td><td class="right">   and users of known security concerns specific to HTTP/1.1</td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="left">   authentication.  More general security considerations are addressed</td><td> </td><td class="right">   authentication.  More general security considerations are addressed</td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="left">   in HTTP messaging [Part1] and semantics [Part2].</td><td> </td><td class="right">   in HTTP messaging [Part1] and semantics [Part2].</td><td class="lineno" valign="top"></td></tr>
325      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
326      <tr><td class="lineno" valign="top"></td><td class="left">6.1.  Authentication Credentials and Idle Clients</td><td> </td><td class="right">6.1.  Authentication Credentials and Idle Clients</td><td class="lineno" valign="top"></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="left">   Existing HTTP clients and user agents typically retain authentication</td><td> </td><td class="right">   Existing HTTP clients and user agents typically retain authentication</td><td class="lineno" valign="top"></td></tr>
329      <tr><td><a name="diff0017" /></td></tr>
330      <tr><td class="lineno" valign="top"></td><td class="lblock">   information indefinitely.  <span class="delete">HTTP/1.1</span> does not provide a <span class="delete">method</span> for <span class="delete">a</span></td><td> </td><td class="rblock">   information indefinitely.  <span class="insert">HTTP</span> does not provide a <span class="insert">mechanism</span> for <span class="insert">the</span></td><td class="lineno" valign="top"></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="lblock">   server to direct clients to discard these cached <span class="delete">credentials.  This</span></td><td> </td><td class="rblock"><span class="insert">   origin</span> server to direct clients to discard these cached <span class="insert">credentials,</span></td><td class="lineno" valign="top"></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   is a significant defect that requires further extensions to HTTP.</span></td><td> </td><td class="rblock"><span class="insert">   since the protocol has no awareness of how credentials are obtained</span></td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   or managed by the user agent.  The mechanisms for expiring or</span></td><td class="lineno" valign="top"></td></tr>
334      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   revoking credentials can be specified as part of an authentication</span></td><td class="lineno" valign="top"></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   scheme definition.</span></td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
337      <tr><td class="lineno" valign="top"></td><td class="left">   Circumstances under which credential caching can interfere with the</td><td> </td><td class="right">   Circumstances under which credential caching can interfere with the</td><td class="lineno" valign="top"></td></tr>
338      <tr><td class="lineno" valign="top"></td><td class="left">   application's security model include but are not limited to:</td><td> </td><td class="right">   application's security model include but are not limited to:</td><td class="lineno" valign="top"></td></tr>
339      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="left">   o  Clients that have been idle for an extended period, following</td><td> </td><td class="right">   o  Clients that have been idle for an extended period, following</td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="left">      which the server might wish to cause the client to re-prompt the</td><td> </td><td class="right">      which the server might wish to cause the client to re-prompt the</td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="left">      user for credentials.</td><td> </td><td class="right">      user for credentials.</td><td class="lineno" valign="top"></td></tr>
343      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
344      <tr><td class="lineno" valign="top"></td><td class="left">   o  Applications that include a session termination indication (such</td><td> </td><td class="right">   o  Applications that include a session termination indication (such</td><td class="lineno" valign="top"></td></tr>
345      <tr><td class="lineno" valign="top"></td><td class="left">      as a "logout" or "commit" button on a page) after which the server</td><td> </td><td class="right">      as a "logout" or "commit" button on a page) after which the server</td><td class="lineno" valign="top"></td></tr>
346      <tr><td class="lineno" valign="top"></td><td class="left">      side of the application "knows" that there is no further reason</td><td> </td><td class="right">      side of the application "knows" that there is no further reason</td><td class="lineno" valign="top"></td></tr>
347      <tr><td class="lineno" valign="top"></td><td class="left">      for the client to retain the credentials.</td><td> </td><td class="right">      for the client to retain the credentials.</td><td class="lineno" valign="top"></td></tr>
348      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
349      <tr><td><a name="diff0018" /></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">This is currently under separate study.  There are a number of work-</span></td><td> </td><td class="rblock">   <span class="insert">User</span> agents that cache credentials are encouraged to provide a</td><td class="lineno" valign="top"></td></tr>
351      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   arounds to parts of this problem, and we encourage the use of</span></td><td> </td><td class="rblock">   readily accessible mechanism for discarding cached credentials under</td><td class="lineno" valign="top"></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   password protection in screen savers, idle time-outs, and other</span></td><td> </td><td class="rblock">   user control.</td><td class="lineno" valign="top"></td></tr>
353      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   methods that mitigate the security problems inherent in this problem.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
354      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   In particular, user</span> agents that cache credentials are encouraged to</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
355      <tr><td class="lineno" valign="top"></td><td class="lblock">   provide a readily accessible mechanism for discarding cached</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
356      <tr><td class="lineno" valign="top"></td><td class="lblock">   credentials under user control.</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
358      <tr><td class="lineno" valign="top"></td><td class="left">6.2.  Protection Spaces</td><td> </td><td class="right">6.2.  Protection Spaces</td><td class="lineno" valign="top"></td></tr>
359      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication schemes that solely rely on the "realm" mechanism for</td><td> </td><td class="right">   Authentication schemes that solely rely on the "realm" mechanism for</td><td class="lineno" valign="top"></td></tr>
361      <tr><td class="lineno" valign="top"></td><td class="left">   establishing a protection space will expose credentials to all</td><td> </td><td class="right">   establishing a protection space will expose credentials to all</td><td class="lineno" valign="top"></td></tr>
362      <tr><td class="lineno" valign="top"></td><td class="left">   resources on an origin server.  Clients that have successfully made</td><td> </td><td class="right">   resources on an origin server.  Clients that have successfully made</td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="left">   authenticated requests with a resource can use the same</td><td> </td><td class="right">   authenticated requests with a resource can use the same</td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="left">   authentication credentials for other resources on the same origin</td><td> </td><td class="right">   authentication credentials for other resources on the same origin</td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="left">   server.  This makes it possible for a different resource to harvest</td><td> </td><td class="right">   server.  This makes it possible for a different resource to harvest</td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="left">   authentication credentials for other resources.</td><td> </td><td class="right">   authentication credentials for other resources.</td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
368      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 13, line 45</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 13, line 45</em></th><td></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="left">7.  Acknowledgments</td><td> </td><td class="right">7.  Acknowledgments</td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
372      <tr><td class="lineno" valign="top"></td><td class="left">   This specification takes over the definition of the HTTP</td><td> </td><td class="right">   This specification takes over the definition of the HTTP</td><td class="lineno" valign="top"></td></tr>
373      <tr><td class="lineno" valign="top"></td><td class="left">   Authentication Framework, previously defined in RFC 2617.  We thank</td><td> </td><td class="right">   Authentication Framework, previously defined in RFC 2617.  We thank</td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="left">   John Franks, Phillip M. Hallam-Baker, Jeffery L. Hostetler, Scott D.</td><td> </td><td class="right">   John Franks, Phillip M. Hallam-Baker, Jeffery L. Hostetler, Scott D.</td><td class="lineno" valign="top"></td></tr>
375      <tr><td class="lineno" valign="top"></td><td class="left">   Lawrence, Paul J. Leach, Ari Luotonen, and Lawrence C. Stewart for</td><td> </td><td class="right">   Lawrence, Paul J. Leach, Ari Luotonen, and Lawrence C. Stewart for</td><td class="lineno" valign="top"></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="left">   their work on that specification.  See Section 6 of [RFC2617] for</td><td> </td><td class="right">   their work on that specification.  See Section 6 of [RFC2617] for</td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="left">   further acknowledgements.</td><td> </td><td class="right">   further acknowledgements.</td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
379      <tr><td><a name="diff0019" /></td></tr>
380      <tr><td class="lineno" valign="top"></td><td class="lblock">   See Section <span class="delete">9</span> of [Part1] for the Acknowledgments related to this</td><td> </td><td class="rblock">   See Section <span class="insert">10</span> of [Part1] for the Acknowledgments related to this</td><td class="lineno" valign="top"></td></tr>
381      <tr><td class="lineno" valign="top"></td><td class="left">   document revision.</td><td> </td><td class="right">   document revision.</td><td class="lineno" valign="top"></td></tr>
382      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
383      <tr><td class="lineno" valign="top"></td><td class="left">8.  References</td><td> </td><td class="right">8.  References</td><td class="lineno" valign="top"></td></tr>
384      <tr><td class="lineno" valign="top"></td><td class="left">8.1.  Normative References</td><td> </td><td class="right">8.1.  Normative References</td><td class="lineno" valign="top"></td></tr>
385      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
386      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part1]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
387      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Message Syntax and Routing",</td><td class="lineno" valign="top"></td></tr>
388      <tr><td><a name="diff0020" /></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p1-messaging-23</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p1-messaging-24</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
390      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">July</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">September</span> 2013.</td><td class="lineno" valign="top"></td></tr>
391      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
392      <tr><td class="lineno" valign="top"></td><td class="left">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td> </td><td class="right">   [Part2]    Fielding, R., Ed. and J. Reschke, Ed., "Hypertext Transfer</td><td class="lineno" valign="top"></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="left">              Protocol (HTTP/1.1): Semantics and Content",</td><td> </td><td class="right">              Protocol (HTTP/1.1): Semantics and Content",</td><td class="lineno" valign="top"></td></tr>
394      <tr><td><a name="diff0021" /></td></tr>
395      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p2-semantics-23</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p2-semantics-24</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">July</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">September</span> 2013.</td><td class="lineno" valign="top"></td></tr>
397      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
398      <tr><td class="lineno" valign="top"></td><td class="left">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke,</td><td class="lineno" valign="top"></td></tr>
399      <tr><td class="lineno" valign="top"></td><td class="left">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td> </td><td class="right">              Ed., "Hypertext Transfer Protocol (HTTP/1.1): Caching",</td><td class="lineno" valign="top"></td></tr>
400      <tr><td><a name="diff0022" /></td></tr>
401      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">draft-ietf-httpbis-p6-cache-23</span> (work in progress),</td><td> </td><td class="rblock">              <span class="insert">draft-ietf-httpbis-p6-cache-24</span> (work in progress),</td><td class="lineno" valign="top"></td></tr>
402      <tr><td class="lineno" valign="top"></td><td class="lblock">              <span class="delete">July</span> 2013.</td><td> </td><td class="rblock">              <span class="insert">September</span> 2013.</td><td class="lineno" valign="top"></td></tr>
403      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
404      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td> </td><td class="right">   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate</td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="left">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td> </td><td class="right">              Requirement Levels", BCP 14, RFC 2119, March 1997.</td><td class="lineno" valign="top"></td></tr>
406      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
407      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td> </td><td class="right">   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax</td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="left">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td> </td><td class="right">              Specifications: ABNF", STD 68, RFC 5234, January 2008.</td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="left">8.2.  Informative References</td><td> </td><td class="right">8.2.  Informative References</td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
412      <tr><td class="lineno" valign="top"></td><td class="left">   [BCP90]    Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td> </td><td class="right">   [BCP90]    Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td class="lineno" valign="top"></td></tr>
413      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
414      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 17, line 43</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 17, line 43</em></th><td></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
416      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/439&gt;: "terminology:</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/439&gt;: "terminology:</td><td class="lineno" valign="top"></td></tr>
417      <tr><td class="lineno" valign="top"></td><td class="left">      mechanism vs framework vs scheme"</td><td> </td><td class="right">      mechanism vs framework vs scheme"</td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/463&gt;: "Editorial</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/463&gt;: "Editorial</td><td class="lineno" valign="top"></td></tr>
420      <tr><td class="lineno" valign="top"></td><td class="left">      suggestions"</td><td> </td><td class="right">      suggestions"</td><td class="lineno" valign="top"></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
422      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/464&gt;: "placement of</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/464&gt;: "placement of</td><td class="lineno" valign="top"></td></tr>
423      <tr><td class="lineno" valign="top"></td><td class="left">      extension point considerations"</td><td> </td><td class="right">      extension point considerations"</td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
425      <tr><td><a name="diff0023" /></td></tr>
426      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">D.5.  Since draft-ietf-httpbis-p7-auth-23</span></td><td class="lineno" valign="top"></td></tr>
427      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
428      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   Closed issues:</span></td><td class="lineno" valign="top"></td></tr>
429      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
430      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/473&gt;: "Forwarding</span></td><td class="lineno" valign="top"></td></tr>
431      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      Proxy-*"</span></td><td class="lineno" valign="top"></td></tr>
432      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="left">Index</td><td> </td><td class="right">Index</td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="left">   4</td><td> </td><td class="right">   4</td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="left">      401 Unauthorized (status code)  7</td><td> </td><td class="right">      401 Unauthorized (status code)  7</td><td class="lineno" valign="top"></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="left">      407 Proxy Authentication Required (status code)  7</td><td> </td><td class="right">      407 Proxy Authentication Required (status code)  7</td><td class="lineno" valign="top"></td></tr>
438      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
439      <tr><td class="lineno" valign="top"></td><td class="left">   A</td><td> </td><td class="right">   A</td><td class="lineno" valign="top"></td></tr>
440      <tr><td class="lineno" valign="top"></td><td class="left">      Authorization header field  8</td><td> </td><td class="right">      Authorization header field  8</td><td class="lineno" valign="top"></td></tr>
441      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
442      <tr><td class="lineno" valign="top"></td><td class="left">   C</td><td> </td><td class="right">   C</td><td class="lineno" valign="top"></td></tr>
443      <tr><td class="lineno" valign="top"></td><td class="left">      Canonical Root URI  6</td><td> </td><td class="right">      Canonical Root URI  6</td><td class="lineno" valign="top"></td></tr>
444      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
445      <tr><td class="lineno" valign="top"></td><td class="left">   G</td><td> </td><td class="right">   G</td><td class="lineno" valign="top"></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left">      Grammar</td><td> </td><td class="right">      Grammar</td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="left">         auth-param  5</td><td> </td><td class="right">         auth-param  5</td><td class="lineno" valign="top"></td></tr>
448      <tr><td class="lineno" valign="top"></td><td class="left">         auth-scheme  5</td><td> </td><td class="right">         auth-scheme  5</td><td class="lineno" valign="top"></td></tr>
449      <tr><td class="lineno" valign="top"></td><td class="left">         Authorization  8</td><td> </td><td class="right">         Authorization  8</td><td class="lineno" valign="top"></td></tr>
450      <tr><td class="lineno" valign="top"></td><td class="left">         challenge  5</td><td> </td><td class="right">         challenge  5</td><td class="lineno" valign="top"></td></tr>
451      <tr><td class="lineno" valign="top"></td><td class="left">         credentials  6</td><td> </td><td class="right">         credentials  6</td><td class="lineno" valign="top"></td></tr>
452      <tr><td class="lineno" valign="top"></td><td class="left">         Proxy-Authenticate  8</td><td> </td><td class="right">         Proxy-Authenticate  8</td><td class="lineno" valign="top"></td></tr>
453      <tr><td><a name="diff0024" /></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="lblock">         Proxy-Authorization  <span class="delete">8</span></td><td> </td><td class="rblock">         Proxy-Authorization  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
455      <tr><td class="lineno" valign="top"></td><td class="left">         token68  5</td><td> </td><td class="right">         token68  5</td><td class="lineno" valign="top"></td></tr>
456      <tr><td class="lineno" valign="top"></td><td class="left">         WWW-Authenticate  9</td><td> </td><td class="right">         WWW-Authenticate  9</td><td class="lineno" valign="top"></td></tr>
457      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
458      <tr><td class="lineno" valign="top"></td><td class="left">   P</td><td> </td><td class="right">   P</td><td class="lineno" valign="top"></td></tr>
459      <tr><td class="lineno" valign="top"></td><td class="left">      Protection Space  6</td><td> </td><td class="right">      Protection Space  6</td><td class="lineno" valign="top"></td></tr>
460      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authenticate header field  8</td><td> </td><td class="right">      Proxy-Authenticate header field  8</td><td class="lineno" valign="top"></td></tr>
461      <tr><td class="lineno" valign="top"></td><td class="left">      Proxy-Authorization header field  8</td><td> </td><td class="right">      Proxy-Authorization header field  8</td><td class="lineno" valign="top"></td></tr>
462      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
463      <tr><td class="lineno" valign="top"></td><td class="left">   R</td><td> </td><td class="right">   R</td><td class="lineno" valign="top"></td></tr>
464      <tr><td class="lineno" valign="top"></td><td class="left">      Realm  6</td><td> </td><td class="right">      Realm  6</td><td class="lineno" valign="top"></td></tr>
465
466     <tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
467     <tr bgcolor="gray"><th colspan="5" align="center"><a name="end">&nbsp;End of changes. 24 change blocks.&nbsp;</a></th></tr>
468     <tr class="stats"><td></td><th><i>50 lines changed or deleted</i></th><th><i> </i></th><th><i>63 lines changed or added</i></th><td></td></tr>
469     <tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.38. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
470   </table>
471   </body>
472   </html>
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