source: draft-ietf-httpbis/diffs/draft-ietf-httpbis-p7-auth-16-from-15.diff.html @ 1697

Last change on this file since 1697 was 1401, checked in by julian.reschke@…, 8 years ago

prepare for publication of -16 on Aug 24.

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36<body > 
37  <table border="0" cellpadding="0" cellspacing="0"> 
38  <tr bgcolor="orange"><th></th><th>&nbsp;draft-ietf-httpbis-p7-auth-15.txt&nbsp;</th><th> </th><th>&nbsp;draft-ietf-httpbis-p7-auth-16.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. Gettys</td><td> </td><td class="right">Obsoletes: 2616 (if approved)                                  J. Gettys</td><td class="lineno" valign="top"></td></tr>
43      <tr><td class="lineno" valign="top"></td><td class="left">Updates: 2617 (if approved)                               Alcatel-Lucent</td><td> </td><td class="right">Updates: 2617 (if approved)                               Alcatel-Lucent</td><td class="lineno" valign="top"></td></tr>
44      <tr><td class="lineno" valign="top"></td><td class="left">Intended status: Standards Track                                J. Mogul</td><td> </td><td class="right">Intended status: Standards Track                                J. Mogul</td><td class="lineno" valign="top"></td></tr>
45      <tr><td><a name="diff0001" /></td></tr>
46      <tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">January 12, 2012 </span>                                            HP</td><td> </td><td class="rblock">Expires: <span class="insert">February 25, 2012</span>                                            HP</td><td class="lineno" valign="top"></td></tr>
47      <tr><td class="lineno" valign="top"></td><td class="left">                                                              H. Frystyk</td><td> </td><td class="right">                                                              H. Frystyk</td><td class="lineno" valign="top"></td></tr>
48      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
49      <tr><td class="lineno" valign="top"></td><td class="left">                                                             L. Masinter</td><td> </td><td class="right">                                                             L. Masinter</td><td class="lineno" valign="top"></td></tr>
50      <tr><td class="lineno" valign="top"></td><td class="left">                                                                   Adobe</td><td> </td><td class="right">                                                                   Adobe</td><td class="lineno" valign="top"></td></tr>
51      <tr><td class="lineno" valign="top"></td><td class="left">                                                                P. Leach</td><td> </td><td class="right">                                                                P. Leach</td><td class="lineno" valign="top"></td></tr>
52      <tr><td class="lineno" valign="top"></td><td class="left">                                                               Microsoft</td><td> </td><td class="right">                                                               Microsoft</td><td class="lineno" valign="top"></td></tr>
53      <tr><td class="lineno" valign="top"></td><td class="left">                                                          T. Berners-Lee</td><td> </td><td class="right">                                                          T. Berners-Lee</td><td class="lineno" valign="top"></td></tr>
54      <tr><td class="lineno" valign="top"></td><td class="left">                                                                 W3C/MIT</td><td> </td><td class="right">                                                                 W3C/MIT</td><td class="lineno" valign="top"></td></tr>
55      <tr><td class="lineno" valign="top"></td><td class="left">                                                           Y. Lafon, Ed.</td><td> </td><td class="right">                                                           Y. Lafon, Ed.</td><td class="lineno" valign="top"></td></tr>
56      <tr><td class="lineno" valign="top"></td><td class="left">                                                                     W3C</td><td> </td><td class="right">                                                                     W3C</td><td class="lineno" valign="top"></td></tr>
57      <tr><td class="lineno" valign="top"></td><td class="left">                                                         J. Reschke, Ed.</td><td> </td><td class="right">                                                         J. Reschke, Ed.</td><td class="lineno" valign="top"></td></tr>
58      <tr><td class="lineno" valign="top"></td><td class="left">                                                              greenbytes</td><td> </td><td class="right">                                                              greenbytes</td><td class="lineno" valign="top"></td></tr>
59      <tr><td><a name="diff0002" /></td></tr>
60      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                         <span class="delete">  July 11</span>, 2011</td><td> </td><td class="rblock">                                                         <span class="insert">August 24</span>, 2011</td><td class="lineno" valign="top"></td></tr>
61      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
62      <tr><td class="lineno" valign="top"></td><td class="left">                    HTTP/1.1, part 7: Authentication</td><td> </td><td class="right">                    HTTP/1.1, part 7: Authentication</td><td class="lineno" valign="top"></td></tr>
63      <tr><td><a name="diff0003" /></td></tr>
64      <tr><td class="lineno" valign="top"></td><td class="lblock">                     draft-ietf-httpbis-p7-auth-1<span class="delete">5</span></td><td> </td><td class="rblock">                     draft-ietf-httpbis-p7-auth-1<span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
65      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
66      <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>
67      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
68      <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>
69      <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>
70      <tr><td class="lineno" valign="top"></td><td class="left">   systems.  HTTP has been in use by the World Wide Web global</td><td> </td><td class="right">   systems.  HTTP has been in use by the World Wide Web global</td><td class="lineno" valign="top"></td></tr>
71      <tr><td class="lineno" valign="top"></td><td class="left">   information initiative since 1990.  This document is Part 7 of the</td><td> </td><td class="right">   information initiative since 1990.  This document is Part 7 of the</td><td class="lineno" valign="top"></td></tr>
72      <tr><td class="lineno" valign="top"></td><td class="left">   seven-part specification that defines the protocol referred to as</td><td> </td><td class="right">   seven-part specification that defines the protocol referred to as</td><td class="lineno" valign="top"></td></tr>
73      <tr><td><a name="diff0004" /></td></tr>
74      <tr><td class="lineno" valign="top"></td><td class="lblock">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.  Part 7 defines</td><td> </td><td class="rblock">   "HTTP/1.1" and, taken together, obsoletes RFC 2616.</td><td class="lineno" valign="top"></td></tr>
75      <tr><td class="lineno" valign="top"></td><td class="lblock">   HTTP <span class="delete">Authentication.</span></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
76      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Part 7 defines <span class="insert">the</span> HTTP <span class="insert">Authentication framework.</span></td><td class="lineno" valign="top"></td></tr>
77      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
78      <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>
79      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
80      <tr><td class="lineno" valign="top"></td><td class="left">   Discussion of this draft should take place on the HTTPBIS working</td><td> </td><td class="right">   Discussion of this draft should take place on the HTTPBIS working</td><td class="lineno" valign="top"></td></tr>
81      <tr><td class="lineno" valign="top"></td><td class="left">   group mailing list (ietf-http-wg@w3.org), which is archived at</td><td> </td><td class="right">   group mailing list (ietf-http-wg@w3.org), which is archived at</td><td class="lineno" valign="top"></td></tr>
82      <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>
83      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
84      <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>
85      <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>
86      <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>
87      <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>
88      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
89      <tr><td><a name="diff0005" /></td></tr>
90      <tr><td class="lineno" valign="top"></td><td class="lblock">   The changes in this draft are summarized in Appendix C.1<span class="delete">6</span>.</td><td> </td><td class="rblock">   The changes in this draft are summarized in Appendix C.1<span class="insert">7</span>.</td><td class="lineno" valign="top"></td></tr>
91      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
92      <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>
93      <tr><td><a name="diff0006" /></td></tr>
94      <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>
95      <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>
96      <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>
97      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
98      <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>
99      <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>
100      <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>
101      <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>
102      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
103      <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>
104      <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>
105      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
106      <tr bgcolor="gray" ><td></td><th><a name="part-l2" /><small>skipping to change at</small><em> page 2, line 17</em></th><th> </th><th><a name="part-r2" /><small>skipping to change at</small><em> page 2, line 20</em></th><td></td></tr>
107      <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>
108      <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>
109      <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>
110      <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>
111      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
112      <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>
113      <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>
114      <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>
115      <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>
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><a name="diff0007" /></td></tr>
118      <tr><td class="lineno" valign="top"></td><td class="lblock">   This Internet-Draft will expire on <span class="delete">January 12</span>, 2012.</td><td> </td><td class="rblock">   This Internet-Draft will expire on <span class="insert">February 25</span>, 2012.</td><td class="lineno" valign="top"></td></tr>
119      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
120      <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>
121      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
122      <tr><td class="lineno" valign="top"></td><td class="left">   Copyright (c) 2011 IETF Trust and the persons identified as the</td><td> </td><td class="right">   Copyright (c) 2011 IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
123      <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>
124      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
125      <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>
126      <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>
127      <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>
128      <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>
129      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
130      <tr bgcolor="gray" ><td></td><th><a name="part-l3" /><small>skipping to change at</small><em> page 3, line 12</em></th><th> </th><th><a name="part-r3" /><small>skipping to change at</small><em> page 3, line 7</em></th><td></td></tr>
131      <tr><td class="lineno" valign="top"></td><td class="left">   it for publication as an RFC or to translate it into languages other</td><td> </td><td class="right">   it for publication as an RFC or to translate it into languages other</td><td class="lineno" valign="top"></td></tr>
132      <tr><td class="lineno" valign="top"></td><td class="left">   than English.</td><td> </td><td class="right">   than English.</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">Table of Contents</td><td> </td><td class="right">Table of Contents</td><td class="lineno" valign="top"></td></tr>
135      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
136      <tr><td class="lineno" valign="top"></td><td class="left">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
137      <tr><td class="lineno" valign="top"></td><td class="left">     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.1.  Requirements . . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
138      <tr><td class="lineno" valign="top"></td><td class="left">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">     1.2.  Syntax Notation  . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
139      <tr><td class="lineno" valign="top"></td><td class="left">       1.2.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  4</td><td> </td><td class="right">       1.2.1.  Core Rules . . . . . . . . . . . . . . . . . . . . . .  4</td><td class="lineno" valign="top"></td></tr>
140      <tr><td class="lineno" valign="top"></td><td class="left">   2.  Access Authentication Framework  . . . . . . . . . . . . . . .  5</td><td> </td><td class="right">   2.  Access Authentication Framework  . . . . . . . . . . . . . . .  5</td><td class="lineno" valign="top"></td></tr>
141      <tr><td><a name="diff0008" /></td></tr>
142      <tr><td class="lineno" valign="top"></td><td class="lblock">     2.1.  Authentication Scheme Registry . . . . . . . . . . . . . .  7</td><td> </td><td class="rblock">     2.1.  <span class="insert">Challenge and Response . . . . . . . . . . . . . . . . . .  5</span></td><td class="lineno" valign="top"></td></tr>
143      <tr><td class="lineno" valign="top"></td><td class="lblock">   3.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  <span class="delete">7</span></td><td> </td><td class="rblock"><span class="insert">     2.2.  Protection Space (Realm) . . . . . . . . . . . . . . . . .  7</span></td><td class="lineno" valign="top"></td></tr>
144      <tr><td class="lineno" valign="top"></td><td class="lblock">     3.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  <span class="delete">7</span></td><td> </td><td class="rblock"><span class="insert">     2.3.</span>  Authentication Scheme Registry . . . . . . . . . . . . . .  7</td><td class="lineno" valign="top"></td></tr>
145      <tr><td class="lineno" valign="top"></td><td class="lblock">     3.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  <span class="delete">7</span></td><td> </td><td class="rblock">       <span class="insert">2.3.1.  Considerations for New Authentication Schemes  . . . .  8</span></td><td class="lineno" valign="top"></td></tr>
146      <tr><td class="lineno" valign="top"></td><td class="lblock">   4.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  <span class="delete">8</span></td><td> </td><td class="rblock">   3.  Status Code Definitions  . . . . . . . . . . . . . . . . . . .  <span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
147      <tr><td class="lineno" valign="top"></td><td class="lblock">     4.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  <span class="delete">8</span></td><td> </td><td class="rblock">     3.1.  401 Unauthorized . . . . . . . . . . . . . . . . . . . . .  <span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
148      <tr><td class="lineno" valign="top"></td><td class="lblock">     4.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . .  <span class="delete">9</span></td><td> </td><td class="rblock">     3.2.  407 Proxy Authentication Required  . . . . . . . . . . . .  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
149      <tr><td class="lineno" valign="top"></td><td class="lblock">     4.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . .  <span class="delete">9</span></td><td> </td><td class="rblock">   4.  Header Field Definitions . . . . . . . . . . . . . . . . . . .  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
150      <tr><td class="lineno" valign="top"></td><td class="lblock">     4.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . .  <span class="delete">9</span></td><td> </td><td class="rblock">     4.1.  Authorization  . . . . . . . . . . . . . . . . . . . . . .  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
151      <tr><td class="lineno" valign="top"></td><td class="lblock">   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">     4.2.  Proxy-Authenticate . . . . . . . . . . . . . . . . . . . . <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
152      <tr><td class="lineno" valign="top"></td><td class="lblock">     5.1.  Authenticaton Scheme Registry  . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">     4.3.  Proxy-Authorization  . . . . . . . . . . . . . . . . . . . <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
153      <tr><td class="lineno" valign="top"></td><td class="lblock">     5.2.  Status Code Registration . . . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">     4.4.  WWW-Authenticate . . . . . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
154      <tr><td class="lineno" valign="top"></td><td class="lblock">     5.3.  Header Field Registration  . . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
155      <tr><td class="lineno" valign="top"></td><td class="lblock">   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock">     5.1.  Authenticaton Scheme Registry  . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
156      <tr><td class="lineno" valign="top"></td><td class="lblock">     6.1.  Authentication Credentials and Idle Clients  . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">     5.2.  Status Code Registration . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
157      <tr><td class="lineno" valign="top"></td><td class="lblock">   7.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">     5.3.  Header Field Registration  . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
158      <tr><td class="lineno" valign="top"></td><td class="lblock">   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
159      <tr><td class="lineno" valign="top"></td><td class="lblock">     8.1.  Normative References . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock">     6.1.  Authentication Credentials and Idle Clients  . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
160      <tr><td class="lineno" valign="top"></td><td class="lblock">     8.2.  Informative References . . . . . . . . . . . . . . . . . . <span class="delete">12</span></td><td> </td><td class="rblock">   7.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
161      <tr><td class="lineno" valign="top"></td><td class="lblock">   Appendix A.  Changes from <span class="delete">RFC</span> 2616 . . . . . . . . . . . <span class="delete">. . . . . 12</span></td><td> </td><td class="rblock">   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
162      <tr><td class="lineno" valign="top"></td><td class="lblock">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . <span class="delete">13</span></td><td> </td><td class="rblock">     8.1.  Normative References . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
163      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">     8.2.  Informative References . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
164      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Appendix A.  Changes from <span class="insert">RFCs</span> 2616 <span class="insert">and 2617</span> . . . . . . . . . . . <span class="insert">14</span></td><td class="lineno" valign="top"></td></tr>
165      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   Appendix B.  Collected ABNF  . . . . . . . . . . . . . . . . . . . <span class="insert">15</span></td><td class="lineno" valign="top"></td></tr>
166      <tr><td class="lineno" valign="top"></td><td class="left">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td> </td><td class="right">   Appendix C.  Change Log (to be removed by RFC Editor before</td><td class="lineno" valign="top"></td></tr>
167      <tr><td><a name="diff0009" /></td></tr>
168      <tr><td class="lineno" valign="top"></td><td class="lblock">                publication)  . . . . . . . . . . . . . . . . . . . . <span class="delete">13</span></td><td> </td><td class="rblock">                publication)  . . . . . . . . . . . . . . . . . . . . <span class="insert">15</span></td><td class="lineno" valign="top"></td></tr>
169      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.1.  Since RFC 2616 . . . . . . . . . . . . . . . . . . . . . . <span class="delete">13</span></td><td> </td><td class="rblock">     C.1.  Since RFC 2616 . . . . . . . . . . . . . . . . . . . . . . <span class="insert">15</span></td><td class="lineno" valign="top"></td></tr>
170      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.2.  Since draft-ietf-httpbis-p7-auth-00  . . . . . . . . . . . <span class="delete">13</span></td><td> </td><td class="rblock">     C.2.  Since draft-ietf-httpbis-p7-auth-00  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
171      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.3.  Since draft-ietf-httpbis-p7-auth-01  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.3.  Since draft-ietf-httpbis-p7-auth-01  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
172      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.4.  Since draft-ietf-httpbis-p7-auth-02  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.4.  Since draft-ietf-httpbis-p7-auth-02  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
173      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.5.  Since draft-ietf-httpbis-p7-auth-03  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.5.  Since draft-ietf-httpbis-p7-auth-03  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
174      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.6.  Since draft-ietf-httpbis-p7-auth-04  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.6.  Since draft-ietf-httpbis-p7-auth-04  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
175      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.7.  Since draft-ietf-httpbis-p7-auth-05  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.7.  Since draft-ietf-httpbis-p7-auth-05  . . . . . . . . . . . <span class="insert">16</span></td><td class="lineno" valign="top"></td></tr>
176      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.8.  Since draft-ietf-httpbis-p7-auth-06  . . . . . . . . . . . <span class="delete">14</span></td><td> </td><td class="rblock">     C.8.  Since draft-ietf-httpbis-p7-auth-06  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
177      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.9.  Since draft-ietf-httpbis-p7-auth-07  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.9.  Since draft-ietf-httpbis-p7-auth-07  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
178      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.10. Since draft-ietf-httpbis-p7-auth-08  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.10. Since draft-ietf-httpbis-p7-auth-08  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
179      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.11. Since draft-ietf-httpbis-p7-auth-09  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.11. Since draft-ietf-httpbis-p7-auth-09  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
180      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.12. Since draft-ietf-httpbis-p7-auth-10  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.12. Since draft-ietf-httpbis-p7-auth-10  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
181      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.13. Since draft-ietf-httpbis-p7-auth-11  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.13. Since draft-ietf-httpbis-p7-auth-11  . . . . . . . . . . . <span class="insert">17</span></td><td class="lineno" valign="top"></td></tr>
182      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.14. Since draft-ietf-httpbis-p7-auth-12  . . . . . . . . . . . <span class="delete">15</span></td><td> </td><td class="rblock">     C.14. Since draft-ietf-httpbis-p7-auth-12  . . . . . . . . . . . <span class="insert">18</span></td><td class="lineno" valign="top"></td></tr>
183      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.15. Since draft-ietf-httpbis-p7-auth-13  . . . . . . . . . . . <span class="delete">16</span></td><td> </td><td class="rblock">     C.15. Since draft-ietf-httpbis-p7-auth-13  . . . . . . . . . . . <span class="insert">18</span></td><td class="lineno" valign="top"></td></tr>
184      <tr><td class="lineno" valign="top"></td><td class="lblock">     C.16. Since draft-ietf-httpbis-p7-auth-14  . . . . . . . . . . . <span class="delete">16</span></td><td> </td><td class="rblock">     C.16. Since draft-ietf-httpbis-p7-auth-14  . . . . . . . . . . . <span class="insert">18</span></td><td class="lineno" valign="top"></td></tr>
185      <tr><td class="lineno" valign="top"></td><td class="lblock">   Index  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">16</span></td><td> </td><td class="rblock"><span class="insert">     C.17. Since draft-ietf-httpbis-p7-auth-15  . . . . . . . . . . . 18</span></td><td class="lineno" valign="top"></td></tr>
186      <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>
187      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
188      <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>
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 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>
191      <tr><td class="lineno" valign="top"></td><td class="left">   includes the relevant parts of RFC 2616 with only minor changes, plus</td><td> </td><td class="right">   includes the relevant parts of RFC 2616 with only minor changes, plus</td><td class="lineno" valign="top"></td></tr>
192      <tr><td class="lineno" valign="top"></td><td class="left">   the general framework for HTTP authentication, as previously defined</td><td> </td><td class="right">   the general framework for HTTP authentication, as previously defined</td><td class="lineno" valign="top"></td></tr>
193      <tr><td class="lineno" valign="top"></td><td class="left">   in "HTTP Authentication: Basic and Digest Access Authentication"</td><td> </td><td class="right">   in "HTTP Authentication: Basic and Digest Access Authentication"</td><td class="lineno" valign="top"></td></tr>
194      <tr><td class="lineno" valign="top"></td><td class="left">   ([RFC2617]).</td><td> </td><td class="right">   ([RFC2617]).</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">   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>
197      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
198      <tr bgcolor="gray" ><td></td><th><a name="part-l4" /><small>skipping to change at</small><em> page 4, line 50</em></th><th> </th><th><a name="part-r4" /><small>skipping to change at</small><em> page 4, line 50</em></th><td></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 following core rules are included by reference, as defined in</td><td> </td><td class="right">   The following core rules are included by reference, as defined in</td><td class="lineno" valign="top"></td></tr>
201      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5234], Appendix B.1: ALPHA (letters), CR (carriage return), CRLF</td><td> </td><td class="right">   [RFC5234], Appendix B.1: ALPHA (letters), CR (carriage return), CRLF</td><td class="lineno" valign="top"></td></tr>
202      <tr><td class="lineno" valign="top"></td><td class="left">   (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote),</td><td> </td><td class="right">   (CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote),</td><td class="lineno" valign="top"></td></tr>
203      <tr><td class="lineno" valign="top"></td><td class="left">   HEXDIG (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit</td><td> </td><td class="right">   HEXDIG (hexadecimal 0-9/A-F/a-f), LF (line feed), OCTET (any 8-bit</td><td class="lineno" valign="top"></td></tr>
204      <tr><td class="lineno" valign="top"></td><td class="left">   sequence of data), SP (space), VCHAR (any visible USASCII character),</td><td> </td><td class="right">   sequence of data), SP (space), VCHAR (any visible USASCII character),</td><td class="lineno" valign="top"></td></tr>
205      <tr><td class="lineno" valign="top"></td><td class="left">   and WSP (whitespace).</td><td> </td><td class="right">   and WSP (whitespace).</td><td class="lineno" valign="top"></td></tr>
206      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
207      <tr><td class="lineno" valign="top"></td><td class="left">1.2.1.  Core Rules</td><td> </td><td class="right">1.2.1.  Core Rules</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><a name="diff0010" /></td></tr>
210      <tr><td class="lineno" valign="top"></td><td class="lblock">   The core rules below are defined in <span class="delete">Section 1.2.2 of </span>[Part1]:</td><td> </td><td class="rblock">   The core rules below are defined in [Part1]:</td><td class="lineno" valign="top"></td></tr>
211      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
212      <tr><td><a name="diff0011" /></td></tr>
213      <tr><td class="lineno" valign="top"></td><td class="lblock">     <span class="delete">quoted-string</span> = <span class="delete">&lt;quoted-string, defined in [Part1], Section 1.2.2&gt;</span></td><td> </td><td class="rblock">     <span class="insert">BWS</span>           = <span class="insert">&lt;BWS,</span> defined in [Part1], Section 1.2.2&gt;</td><td class="lineno" valign="top"></td></tr>
214      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     token         = &lt;token,</span> defined in [Part1], Section 1.2.2&gt;</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
215      <tr><td class="lineno" valign="top"></td><td class="left">     OWS           = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td> </td><td class="right">     OWS           = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td class="lineno" valign="top"></td></tr>
216      <tr><td><a name="diff0012" /></td></tr>
217      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">     <span class="insert">quoted-string = &lt;quoted-string, defined in [Part1], Section 3.2.3&gt;</span></td><td class="lineno" valign="top"></td></tr>
218      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     token         = &lt;token, defined in [Part1], Section 3.2.3&gt;</span></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">2.  Access Authentication Framework</td><td> </td><td class="right">2.  Access Authentication Framework</td><td class="lineno" valign="top"></td></tr>
221      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
222      <tr><td><a name="diff0013" /></td></tr>
223      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">2.1.  Challenge and Response</span></td><td class="lineno" valign="top"></td></tr>
224      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
225      <tr><td class="lineno" valign="top"></td><td class="left">   HTTP provides a simple challenge-response authentication mechanism</td><td> </td><td class="right">   HTTP provides a simple challenge-response authentication mechanism</td><td class="lineno" valign="top"></td></tr>
226      <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>
227      <tr><td class="lineno" valign="top"></td><td class="left">   client to provide authentication information.  It uses an extensible,</td><td> </td><td class="right">   client to provide authentication information.  It uses an extensible,</td><td class="lineno" valign="top"></td></tr>
228      <tr><td class="lineno" valign="top"></td><td class="left">   case-insensitive token to identify the authentication scheme,</td><td> </td><td class="right">   case-insensitive token to identify the authentication scheme,</td><td class="lineno" valign="top"></td></tr>
229      <tr><td><a name="diff0014" /></td></tr>
230      <tr><td class="lineno" valign="top"></td><td class="lblock">   followed by <span class="delete">a comma-separated list of attribute-value pairs which</span></td><td> </td><td class="rblock">   followed by <span class="insert">additional information</span> necessary for achieving</td><td class="lineno" valign="top"></td></tr>
231      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   carry the parameters</span> necessary for achieving authentication via that</td><td> </td><td class="rblock">   authentication via that scheme.  <span class="insert">The latter can either be a comma-</span></td><td class="lineno" valign="top"></td></tr>
232      <tr><td class="lineno" valign="top"></td><td class="lblock">   scheme.</td><td> </td><td class="rblock"><span class="insert">   separated list of attribute-value pairs or a single sequence of</span></td><td class="lineno" valign="top"></td></tr>
233      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   characters capable of holding base64-encoded information.</span></td><td class="lineno" valign="top"></td></tr>
234      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
235      <tr><td class="lineno" valign="top"></td><td class="left">     auth-scheme    = token</td><td> </td><td class="right">     auth-scheme    = token</td><td class="lineno" valign="top"></td></tr>
236      <tr><td><a name="diff0015" /></td></tr>
237      <tr><td class="lineno" valign="top"></td><td class="lblock">     auth-param     = token "=" ( token / quoted-string )</td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
238      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">     auth-param     = token <span class="insert">BWS</span> "=" <span class="insert">BWS</span> ( token / quoted-string )</td><td class="lineno" valign="top"></td></tr>
239      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
240      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">     <span class="insert">b64token       = 1*( ALPHA / DIGIT /</span></td><td class="lineno" valign="top"></td></tr>
241      <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>
242      <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>
243      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The "b64token" syntax allows the 66 unreserved URI characters</span></td><td class="lineno" valign="top"></td></tr>
244      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   ([RFC3986]), plus a few others, so that it can hold a base64,</span></td><td class="lineno" valign="top"></td></tr>
245      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   base64url (URL and filename safe alphabet), base32, or base16 (hex)</span></td><td class="lineno" valign="top"></td></tr>
246      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   encoding, with or without padding, but excluding whitespace</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">   ([RFC4648]).</span></td><td class="lineno" valign="top"></td></tr>
248      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
249      <tr><td class="lineno" valign="top"></td><td class="left">   The 401 (Unauthorized) response message is used by an origin server</td><td> </td><td class="right">   The 401 (Unauthorized) response message is used by an origin server</td><td class="lineno" valign="top"></td></tr>
250      <tr><td class="lineno" valign="top"></td><td class="left">   to challenge the authorization of a user agent.  This response MUST</td><td> </td><td class="right">   to challenge the authorization of a user agent.  This response MUST</td><td class="lineno" valign="top"></td></tr>
251      <tr><td class="lineno" valign="top"></td><td class="left">   include a WWW-Authenticate header field containing at least one</td><td> </td><td class="right">   include a WWW-Authenticate header field containing at least one</td><td class="lineno" valign="top"></td></tr>
252      <tr><td><a name="diff0016" /></td></tr>
253      <tr><td class="lineno" valign="top"></td><td class="lblock">   challenge applicable to the requested resource.  The 407 (Proxy</td><td> </td><td class="rblock">   challenge applicable to the requested resource.</td><td class="lineno" valign="top"></td></tr>
254      <tr><td class="lineno" valign="top"></td><td class="lblock">   Authentication Required) response message is used by a proxy to</td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
255      <tr><td class="lineno" valign="top"></td><td class="lblock">   challenge the authorization of a client and MUST include a <span class="delete">Proxy-</span></td><td> </td><td class="rblock">   The 407 (Proxy Authentication Required) response message is used by a</td><td class="lineno" valign="top"></td></tr>
256      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Authenticate</span> header field containing at least one challenge</td><td> </td><td class="rblock">   proxy to challenge the authorization of a client and MUST include a</td><td class="lineno" valign="top"></td></tr>
257      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">Proxy-Authenticate</span> header field containing at least one challenge</td><td class="lineno" valign="top"></td></tr>
258      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the proxy for the requested resource.</td><td> </td><td class="right">   applicable to the proxy for the requested resource.</td><td class="lineno" valign="top"></td></tr>
259      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
260      <tr><td><a name="diff0017" /></td></tr>
261      <tr><td class="lineno" valign="top"></td><td class="lblock">     challenge   = auth-scheme <span class="delete">1*SP 1#auth-param</span></td><td> </td><td class="rblock">     challenge   = auth-scheme <span class="insert">[ 1*SP ( b64token / #auth-param ) ]</span></td><td class="lineno" valign="top"></td></tr>
262      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
263      <tr><td class="lineno" valign="top"></td><td class="left">      Note: User agents will need to take special care in parsing the</td><td> </td><td class="right">      Note: User agents will need to take special care in parsing the</td><td class="lineno" valign="top"></td></tr>
264      <tr><td><a name="diff0018" /></td></tr>
265      <tr><td class="lineno" valign="top"></td><td class="lblock">      WWW-Authenticate <span class="delete">or</span> Proxy-Authenticate header field <span class="delete">value if it</span></td><td> </td><td class="rblock">      WWW-Authenticate <span class="insert">and</span> Proxy-Authenticate header field <span class="insert">values</span></td><td class="lineno" valign="top"></td></tr>
266      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      contains</span> more than one challenge, or if more than one <span class="delete">WWW-</span></td><td> </td><td class="rblock"><span class="insert">      because they can contain</span> more than one challenge, or if more than</td><td class="lineno" valign="top"></td></tr>
267      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">      Authenticate header field</span> is provided, since the contents of a</td><td> </td><td class="rblock">      one <span class="insert">of each</span> is provided, since the contents of a challenge can</td><td class="lineno" valign="top"></td></tr>
268      <tr><td class="lineno" valign="top"></td><td class="lblock">      challenge can itself contain a comma-separated list of</td><td> </td><td class="rblock">      itself contain a comma-separated list of authentication</td><td class="lineno" valign="top"></td></tr>
269      <tr><td class="lineno" valign="top"></td><td class="lblock">      authentication parameters.</td><td> </td><td class="rblock">      parameters.</td><td class="lineno" valign="top"></td></tr>
270      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
271      <tr><td class="lineno" valign="top"></td><td class="left">      Note: Many browsers fail to parse challenges containing unknown</td><td> </td><td class="right">      Note: Many browsers fail to parse challenges containing unknown</td><td class="lineno" valign="top"></td></tr>
272      <tr><td class="lineno" valign="top"></td><td class="left">      schemes.  A workaround for this problem is to list well-supported</td><td> </td><td class="right">      schemes.  A workaround for this problem is to list well-supported</td><td class="lineno" valign="top"></td></tr>
273      <tr><td class="lineno" valign="top"></td><td class="left">      schemes (such as "basic") first.</td><td> </td><td class="right">      schemes (such as "basic") first.</td><td class="lineno" valign="top"></td></tr>
274      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
275      <tr><td><a name="diff0019" /></td></tr>
276      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">The authentication parameter realm is defined for all authentication</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
277      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   schemes:</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
278      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
279      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     realm       = "realm" "=" realm-value</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
280      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">     realm-value = quoted-string</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
281      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"></span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
282      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   The realm directive (case-insensitive) is required for all</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
283      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   authentication schemes that issue a challenge.  The realm value</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
284      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   (case-sensitive), in combination with the canonical root URI (the</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
285      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   scheme and authority components of the effective request URI; see</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
286      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Section 4.3 of [Part1]) of the server being accessed, defines the</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
287      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   protection space.  These realms allow the protected resources on a</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
288      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   server to be partitioned into a set of protection spaces, each with</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
289      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   its own authentication scheme and/or authorization database.  The</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
290      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   realm value is a string, generally assigned by the origin server,</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
291      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   which can have additional semantics specific to the authentication</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
292      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   scheme.  Note that there can be multiple challenges with the same</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
293      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   auth-scheme but different realms.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
294      <tr><td class="lineno" valign="top"></td><td class="lblock">                                                                         </td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
295      <tr><td class="lineno" valign="top"></td><td class="left">   A user agent that wishes to authenticate itself with an origin server</td><td> </td><td class="right">   A user agent that wishes to authenticate itself with an origin server</td><td class="lineno" valign="top"></td></tr>
296      <tr><td class="lineno" valign="top"></td><td class="left">   -- usually, but not necessarily, after receiving a 401 (Unauthorized)</td><td> </td><td class="right">   -- usually, but not necessarily, after receiving a 401 (Unauthorized)</td><td class="lineno" valign="top"></td></tr>
297      <tr><td class="lineno" valign="top"></td><td class="left">   -- MAY do so by including an Authorization header field with the</td><td> </td><td class="right">   -- MAY do so by including an Authorization header field with the</td><td class="lineno" valign="top"></td></tr>
298      <tr><td><a name="diff0020" /></td></tr>
299      <tr><td class="lineno" valign="top"></td><td class="lblock">   request.  <span class="delete">A client that wishes to authenticate itself with a proxy --</span></td><td> </td><td class="rblock">   request.</td><td class="lineno" valign="top"></td></tr>
300      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   usually, but not necessarily, after receiving a 407 (Proxy</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
301      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Authentication Required) -- MAY do so by including a Proxy-</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
302      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   Authorization header field with the request.  Both the Authorization</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
303      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   field value and the Proxy-Authorization field value consist of</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
304      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   credentials containing the authentication information of the client</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
305      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   for the realm of the resource being requested.  The user agent MUST</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
306      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   choose to use one of the challenges with the strongest auth-scheme it</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
307      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   understands and request credentials from the user based upon that</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
308      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   challenge.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
309      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
310      <tr><td><a name="diff0021" /></td></tr>
311      <tr><td class="lineno" valign="top"></td><td class="lblock">     <span class="delete">credentials = auth-scheme ( token</span></td><td> </td><td class="rblock">   <span class="insert">A client that wishes to authenticate itself with a proxy -- usually,</span></td><td class="lineno" valign="top"></td></tr>
312      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">                               / quoted-string</span></td><td> </td><td class="rblock"><span class="insert">   but not necessarily, after receiving a 407 (Proxy Authentication</span></td><td class="lineno" valign="top"></td></tr>
313      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">                               / #auth-param )</span></td><td> </td><td class="rblock"><span class="insert">   Required) -- MAY do so by including a Proxy-Authorization header</span></td><td class="lineno" valign="top"></td></tr>
314      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   field with the request.</span></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><a name="diff0022" /></td></tr>
317      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">The protection space determines the domain over which credentials can</span></td><td> </td><td class="rblock">   <span class="insert">Both</span> the <span class="insert">Authorization field value and the Proxy-Authorization field</span></td><td class="lineno" valign="top"></td></tr>
318      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   be automatically applied.  If a prior request has been authorized,</span></td><td> </td><td class="rblock"><span class="insert">   value consist of</span> credentials <span class="insert">containing the authentication</span></td><td class="lineno" valign="top"></td></tr>
319      <tr><td class="lineno" valign="top"></td><td class="lblock">   the <span class="delete">same</span> credentials <span class="delete">MAY be reused for all other requests within that</span></td><td> </td><td class="rblock"><span class="insert">   information of the client</span> for <span class="insert">the realm</span> of the <span class="insert">resource being</span></td><td class="lineno" valign="top"></td></tr>
320      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   protection space</span> for <span class="delete">a period</span> of <span class="delete">time determined by</span> the</td><td> </td><td class="rblock"><span class="insert">   requested.  The</span> user <span class="insert">agent MUST choose to use one of</span> the <span class="insert">challenges</span></td><td class="lineno" valign="top"></td></tr>
321      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">authentication scheme, parameters, and/or</span> user <span class="delete">preference.  Unless</span></td><td> </td><td class="rblock"><span class="insert">   with</span> the <span class="insert">strongest auth-scheme it understands and request credentials</span></td><td class="lineno" valign="top"></td></tr>
322      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   otherwise defined by</span> the <span class="delete">authentication scheme, a single protection</span></td><td> </td><td class="rblock"><span class="insert">   from the user based upon that challenge.</span></td><td class="lineno" valign="top"></td></tr>
323      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   space cannot extend outside</span> the <span class="delete">scope of its server.</span></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
324      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     credentials = auth-scheme [ 1*SP ( b64token / #auth-param ) ]</span></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">   If the origin server does not wish to accept the credentials sent</td><td> </td><td class="right">   If the origin server does not wish to accept the credentials sent</td><td class="lineno" valign="top"></td></tr>
327      <tr><td class="lineno" valign="top"></td><td class="left">   with a request, it SHOULD return a 401 (Unauthorized) response.  The</td><td> </td><td class="right">   with a request, it SHOULD return a 401 (Unauthorized) response.  The</td><td class="lineno" valign="top"></td></tr>
328      <tr><td class="lineno" valign="top"></td><td class="left">   response MUST include a WWW-Authenticate header field containing at</td><td> </td><td class="right">   response MUST include a WWW-Authenticate header field containing at</td><td class="lineno" valign="top"></td></tr>
329      <tr><td class="lineno" valign="top"></td><td class="left">   least one (possibly new) challenge applicable to the requested</td><td> </td><td class="right">   least one (possibly new) challenge applicable to the requested</td><td class="lineno" valign="top"></td></tr>
330      <tr><td><a name="diff0023" /></td></tr>
331      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">resource.  If a proxy does not accept the credentials sent with a</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
332      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   request, it SHOULD return a 407 (Proxy Authentication Required).  The</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
333      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   response MUST include a Proxy-Authenticate header field containing a</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
334      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   (possibly new) challenge applicable to the proxy for the requested</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
335      <tr><td class="lineno" valign="top"></td><td class="left">   resource.</td><td> </td><td class="right">   resource.</td><td class="lineno" valign="top"></td></tr>
336      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
337      <tr><td><a name="diff0024" /></td></tr>
338      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">If a proxy does not accept the credentials sent with a request, it</span></td><td class="lineno" valign="top"></td></tr>
339      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   SHOULD return a 407 (Proxy Authentication Required).  The response</span></td><td class="lineno" valign="top"></td></tr>
340      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   MUST include a Proxy-Authenticate header field containing a (possibly</span></td><td class="lineno" valign="top"></td></tr>
341      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   new) challenge applicable to the proxy for the requested resource.</span></td><td class="lineno" valign="top"></td></tr>
342      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
343      <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>
344      <tr><td class="lineno" valign="top"></td><td class="left">   challenge-response mechanism for access authentication.  Additional</td><td> </td><td class="right">   challenge-response mechanism for access authentication.  Additional</td><td class="lineno" valign="top"></td></tr>
345      <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>
346      <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>
347      <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>
348      <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>
349      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
350      <tr><td class="lineno" valign="top"></td><td class="left">   Proxies MUST forward the WWW-Authenticate and Authorization headers</td><td> </td><td class="right">   Proxies MUST forward the WWW-Authenticate and Authorization headers</td><td class="lineno" valign="top"></td></tr>
351      <tr><td class="lineno" valign="top"></td><td class="left">   unmodified and follow the rules found in Section 4.1.</td><td> </td><td class="right">   unmodified and follow the rules found in Section 4.1.</td><td class="lineno" valign="top"></td></tr>
352      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
353      <tr><td><a name="diff0025" /></td></tr>
354      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">2.1.</span>  Authentication Scheme Registry</td><td> </td><td class="rblock"><span class="insert">2.2.  Protection Space (Realm)</span></td><td class="lineno" valign="top"></td></tr>
355      <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>
356      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The authentication parameter realm is reserved for use by</span></td><td class="lineno" valign="top"></td></tr>
357      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   authentication schemes that wish to indicate the scope of protection:</span></td><td class="lineno" valign="top"></td></tr>
358      <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>
359      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     realm       = "realm" BWS "=" BWS realm-value</span></td><td class="lineno" valign="top"></td></tr>
360      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">     realm-value = quoted-string</span></td><td class="lineno" valign="top"></td></tr>
361      <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>
362      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   A protection space is defined by the canonical root URI (the scheme</span></td><td class="lineno" valign="top"></td></tr>
363      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   and authority components of the effective request URI; see Section</span></td><td class="lineno" valign="top"></td></tr>
364      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   4.3 of [Part1]) of the server being accessed, in combination with the</span></td><td class="lineno" valign="top"></td></tr>
365      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   realm value if present.  These realms allow the protected resources</span></td><td class="lineno" valign="top"></td></tr>
366      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   on a server to be partitioned into a set of protection spaces, each</span></td><td class="lineno" valign="top"></td></tr>
367      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   with its own authentication scheme and/or authorization database.</span></td><td class="lineno" valign="top"></td></tr>
368      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The realm value is a string, generally assigned by the origin server,</span></td><td class="lineno" valign="top"></td></tr>
369      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   which can have additional semantics specific to the authentication</span></td><td class="lineno" valign="top"></td></tr>
370      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   scheme.  Note that there can be multiple challenges with the same</span></td><td class="lineno" valign="top"></td></tr>
371      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   auth-scheme but different realms.</span></td><td class="lineno" valign="top"></td></tr>
372      <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>
373      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The protection space determines the domain over which credentials can</span></td><td class="lineno" valign="top"></td></tr>
374      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   be automatically applied.  If a prior request has been authorized,</span></td><td class="lineno" valign="top"></td></tr>
375      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   the same credentials MAY be reused for all other requests within that</span></td><td class="lineno" valign="top"></td></tr>
376      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   protection space for a period of time determined by the</span></td><td class="lineno" valign="top"></td></tr>
377      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   authentication scheme, parameters, and/or user preference.  Unless</span></td><td class="lineno" valign="top"></td></tr>
378      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   otherwise defined by the authentication scheme, a single protection</span></td><td class="lineno" valign="top"></td></tr>
379      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   space cannot extend outside the scope of its server.</span></td><td class="lineno" valign="top"></td></tr>
380      <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>
381      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">2.3.</span>  Authentication Scheme Registry</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">   The HTTP Authentication Scheme Registry defines the name space for</td><td> </td><td class="right">   The HTTP Authentication Scheme Registry defines the name space for</td><td class="lineno" valign="top"></td></tr>
384      <tr><td class="lineno" valign="top"></td><td class="left">   the authentication schemes in challenges and credentials.</td><td> </td><td class="right">   the authentication schemes in challenges and credentials.</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">   Registrations MUST include the following fields:</td><td> </td><td class="right">   Registrations MUST include the following fields:</td><td class="lineno" valign="top"></td></tr>
387      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
388      <tr><td class="lineno" valign="top"></td><td class="left">   o  Authentication Scheme Name</td><td> </td><td class="right">   o  Authentication Scheme Name</td><td class="lineno" valign="top"></td></tr>
389      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
390      <tr><td class="lineno" valign="top"></td><td class="left">   o  Pointer to specification text</td><td> </td><td class="right">   o  Pointer to specification text</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><a name="diff0026" /></td></tr>
393      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">o  Notes (optional)</span></td><td class="lineno" valign="top"></td></tr>
394      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
395      <tr><td class="lineno" valign="top"></td><td class="left">   Values to be added to this name space are subject to IETF review</td><td> </td><td class="right">   Values to be added to this name space are subject to IETF review</td><td class="lineno" valign="top"></td></tr>
396      <tr><td class="lineno" valign="top"></td><td class="left">   ([RFC5226], Section 4.1).</td><td> </td><td class="right">   ([RFC5226], Section 4.1).</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">   The registry itself is maintained at</td><td> </td><td class="right">   The registry itself is maintained at</td><td class="lineno" valign="top"></td></tr>
399      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://www.iana.org/assignments/http-authschemes&gt;.</td><td> </td><td class="right">   &lt;http://www.iana.org/assignments/http-authschemes&gt;.</td><td class="lineno" valign="top"></td></tr>
400      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
401      <tr><td><a name="diff0027" /></td></tr>
402      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">2.3.1.  Considerations for New Authentication Schemes</span></td><td class="lineno" valign="top"></td></tr>
403      <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>
404      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   There are certain aspects of the HTTP Authentication Framework that</span></td><td class="lineno" valign="top"></td></tr>
405      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   put constraints on how new authentication schemes can work:</span></td><td class="lineno" valign="top"></td></tr>
406      <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>
407      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Authentication schemes need to be compatible with the inherent</span></td><td class="lineno" valign="top"></td></tr>
408      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      constraints of HTTP; for instance, that messages need to keep</span></td><td class="lineno" valign="top"></td></tr>
409      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      their semantics when inspected in isolation, thus an</span></td><td class="lineno" valign="top"></td></tr>
410      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      authentication scheme can not bind information to the TCP session</span></td><td class="lineno" valign="top"></td></tr>
411      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      over which the message was received (see Section 2.2 of [Part1]).</span></td><td class="lineno" valign="top"></td></tr>
412      <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>
413      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  The authentication parameter "realm" is reserved for defining</span></td><td class="lineno" valign="top"></td></tr>
414      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      Protection Spaces as defined in Section 2.2.  New schemes MUST NOT</span></td><td class="lineno" valign="top"></td></tr>
415      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      use it in a way incompatible with that definition.</span></td><td class="lineno" valign="top"></td></tr>
416      <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>
417      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  The "b64token" notation was introduced for compatibility with</span></td><td class="lineno" valign="top"></td></tr>
418      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      existing authentication schemes and can only be used once per</span></td><td class="lineno" valign="top"></td></tr>
419      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      challenge/credentials.  New schemes thus ought to use the "auth-</span></td><td class="lineno" valign="top"></td></tr>
420      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      param" syntax instead, because otherwise future extensions will be</span></td><td class="lineno" valign="top"></td></tr>
421      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      impossible.</span></td><td class="lineno" valign="top"></td></tr>
422      <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>
423      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  Authentication schemes need to document whether they are usable in</span></td><td class="lineno" valign="top"></td></tr>
424      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      origin-server authentication (i.e., using WWW-Authenticate),</span></td><td class="lineno" valign="top"></td></tr>
425      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      and/or proxy authentication (i.e., using Proxy-Authenticate).</span></td><td class="lineno" valign="top"></td></tr>
426      <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>
427      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   o  The credentials carried in an Authorization header field are</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">      specific to the User Agent, and therefore have the same effect on</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">      HTTP caches as the "private" Cache-Control response directive,</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">      within the scope of the request they appear in.</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"></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"><span class="insert">      Therefore, new authentication schemes which choose not to carry</span></td><td class="lineno" valign="top"></td></tr>
433      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      credentials in the Authorization header (e.g., using a newly</span></td><td class="lineno" valign="top"></td></tr>
434      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      defined header) will need to explicitly disallow caching, by</span></td><td class="lineno" valign="top"></td></tr>
435      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      mandating the use of either Cache-Control request directives</span></td><td class="lineno" valign="top"></td></tr>
436      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      (e.g., "no-store") or response directives (e.g., "private").</span></td><td class="lineno" valign="top"></td></tr>
437      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
438      <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>
439      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
440      <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>
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">   The request requires user authentication.  The response MUST include</td><td> </td><td class="right">   The request requires user authentication.  The response MUST include</td><td class="lineno" valign="top"></td></tr>
443      <tr><td class="lineno" valign="top"></td><td class="left">   a WWW-Authenticate header field (Section 4.4) containing a challenge</td><td> </td><td class="right">   a WWW-Authenticate header field (Section 4.4) containing a challenge</td><td class="lineno" valign="top"></td></tr>
444      <tr><td class="lineno" valign="top"></td><td class="left">   applicable to the target resource.  The client MAY repeat the request</td><td> </td><td class="right">   applicable to the target resource.  The client MAY repeat the request</td><td class="lineno" valign="top"></td></tr>
445      <tr><td class="lineno" valign="top"></td><td class="left">   with a suitable Authorization header field (Section 4.1).  If the</td><td> </td><td class="right">   with a suitable Authorization header field (Section 4.1).  If the</td><td class="lineno" valign="top"></td></tr>
446      <tr><td class="lineno" valign="top"></td><td class="left">   request already included Authorization credentials, then the 401</td><td> </td><td class="right">   request already included Authorization credentials, then the 401</td><td class="lineno" valign="top"></td></tr>
447      <tr><td class="lineno" valign="top"></td><td class="left">   response indicates that authorization has been refused for those</td><td> </td><td class="right">   response indicates that authorization has been refused for those</td><td class="lineno" valign="top"></td></tr>
448      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
449      <tr bgcolor="gray" ><td></td><th><a name="part-l5" /><small>skipping to change at</small><em> page 9, line 45</em></th><th> </th><th><a name="part-r5" /><small>skipping to change at</small><em> page 11, line 9</em></th><td></td></tr>
450      <tr><td class="lineno" valign="top"></td><td class="left">   chain, the Proxy-Authorization header field is consumed by the first</td><td> </td><td class="right">   chain, the Proxy-Authorization header field is consumed by the first</td><td class="lineno" valign="top"></td></tr>
451      <tr><td class="lineno" valign="top"></td><td class="left">   outbound proxy that was expecting to receive credentials.  A proxy</td><td> </td><td class="right">   outbound proxy that was expecting to receive credentials.  A proxy</td><td class="lineno" valign="top"></td></tr>
452      <tr><td class="lineno" valign="top"></td><td class="left">   MAY relay the credentials from the client request to the next proxy</td><td> </td><td class="right">   MAY relay the credentials from the client request to the next proxy</td><td class="lineno" valign="top"></td></tr>
453      <tr><td class="lineno" valign="top"></td><td class="left">   if that is the mechanism by which the proxies cooperatively</td><td> </td><td class="right">   if that is the mechanism by which the proxies cooperatively</td><td class="lineno" valign="top"></td></tr>
454      <tr><td class="lineno" valign="top"></td><td class="left">   authenticate a given request.</td><td> </td><td class="right">   authenticate a given request.</td><td class="lineno" valign="top"></td></tr>
455      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
456      <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>
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">   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>
459      <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>
460      <tr><td><a name="diff0028" /></td></tr>
461      <tr><td class="lineno" valign="top"></td><td class="lblock">   applicable to the effective request URI (Section 4.3 of [Part1]).  It</td><td> </td><td class="rblock">   applicable to the effective request URI (Section 4.3 of [Part1]).</td><td class="lineno" valign="top"></td></tr>
462      <tr><td class="lineno" valign="top"></td><td class="lblock">   MUST be included in 401 (Unauthorized) response <span class="delete">messages.</span></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
463      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   It MUST be included in 401 (Unauthorized) response <span class="insert">messages and MAY</span></td><td class="lineno" valign="top"></td></tr>
464      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   be included in other response messages to indicate that supplying</span></td><td class="lineno" valign="top"></td></tr>
465      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   credentials (or different credentials) might affect the response.</span></td><td class="lineno" valign="top"></td></tr>
466      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
467      <tr><td class="lineno" valign="top"></td><td class="left">     WWW-Authenticate = 1#challenge</td><td> </td><td class="right">     WWW-Authenticate = 1#challenge</td><td class="lineno" valign="top"></td></tr>
468      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
469      <tr><td class="lineno" valign="top"></td><td class="left">   User agents are advised to take special care in parsing the WWW-</td><td> </td><td class="right">   User agents are advised to take special care in parsing the WWW-</td><td class="lineno" valign="top"></td></tr>
470      <tr><td class="lineno" valign="top"></td><td class="left">   Authenticate field value as it might contain more than one challenge,</td><td> </td><td class="right">   Authenticate field value as it might contain more than one challenge,</td><td class="lineno" valign="top"></td></tr>
471      <tr><td class="lineno" valign="top"></td><td class="left">   or if more than one WWW-Authenticate header field is provided, the</td><td> </td><td class="right">   or if more than one WWW-Authenticate header field is provided, the</td><td class="lineno" valign="top"></td></tr>
472      <tr><td class="lineno" valign="top"></td><td class="left">   contents of a challenge itself can contain a comma-separated list of</td><td> </td><td class="right">   contents of a challenge itself can contain a comma-separated list of</td><td class="lineno" valign="top"></td></tr>
473      <tr><td class="lineno" valign="top"></td><td class="left">   authentication parameters.</td><td> </td><td class="right">   authentication parameters.</td><td class="lineno" valign="top"></td></tr>
474      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
475      <tr><td class="lineno" valign="top"></td><td class="left">5.  IANA Considerations</td><td> </td><td class="right">5.  IANA Considerations</td><td class="lineno" valign="top"></td></tr>
476      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
477      <tr><td class="lineno" valign="top"></td><td class="left">5.1.  Authenticaton Scheme Registry</td><td> </td><td class="right">5.1.  Authenticaton Scheme Registry</td><td class="lineno" valign="top"></td></tr>
478      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
479      <tr><td class="lineno" valign="top"></td><td class="left">   The registration procedure for HTTP Authentication Schemes is defined</td><td> </td><td class="right">   The registration procedure for HTTP Authentication Schemes is defined</td><td class="lineno" valign="top"></td></tr>
480      <tr><td><a name="diff0029" /></td></tr>
481      <tr><td class="lineno" valign="top"></td><td class="lblock">   by Section 2.<span class="delete">1</span> of this document.</td><td> </td><td class="rblock">   by Section 2.<span class="insert">3</span> of this document.</td><td class="lineno" valign="top"></td></tr>
482      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
483      <tr><td class="lineno" valign="top"></td><td class="left">   The HTTP Method Authentication Scheme shall be created at</td><td> </td><td class="right">   The HTTP Method Authentication Scheme shall be created at</td><td class="lineno" valign="top"></td></tr>
484      <tr><td class="lineno" valign="top"></td><td class="left">   &lt;http://www.iana.org/assignments/http-authschemes&gt;.</td><td> </td><td class="right">   &lt;http://www.iana.org/assignments/http-authschemes&gt;.</td><td class="lineno" valign="top"></td></tr>
485      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
486      <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>
487      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
488      <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>
489      <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>
490      <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>
491      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
492      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
493      <tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 11, line 38</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 13, line 9</em></th><td></td></tr>
494      <tr><td class="lineno" valign="top"></td><td class="left">   password protection in screen savers, idle time-outs, and other</td><td> </td><td class="right">   password protection in screen savers, idle time-outs, and other</td><td class="lineno" valign="top"></td></tr>
495      <tr><td class="lineno" valign="top"></td><td class="left">   methods which mitigate the security problems inherent in this</td><td> </td><td class="right">   methods which mitigate the security problems inherent in this</td><td class="lineno" valign="top"></td></tr>
496      <tr><td class="lineno" valign="top"></td><td class="left">   problem.  In particular, user agents which cache credentials are</td><td> </td><td class="right">   problem.  In particular, user agents which cache credentials are</td><td class="lineno" valign="top"></td></tr>
497      <tr><td class="lineno" valign="top"></td><td class="left">   encouraged to provide a readily accessible mechanism for discarding</td><td> </td><td class="right">   encouraged to provide a readily accessible mechanism for discarding</td><td class="lineno" valign="top"></td></tr>
498      <tr><td class="lineno" valign="top"></td><td class="left">   cached credentials under user control.</td><td> </td><td class="right">   cached credentials under user control.</td><td class="lineno" valign="top"></td></tr>
499      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
500      <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>
501      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
502      <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>
503      <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>
504      <tr><td><a name="diff0030" /></td></tr>
505      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">to</span> John Franks, Phillip M. Hallam-Baker, Jeffery L. Hostetler, Scott</td><td> </td><td class="rblock">   John Franks, Phillip M. Hallam-Baker, Jeffery L. Hostetler, Scott D.</td><td class="lineno" valign="top"></td></tr>
506      <tr><td class="lineno" valign="top"></td><td class="lblock">   D. Lawrence, Paul J. Leach, Ari Luotonen, and Lawrence C. Stewart for</td><td> </td><td class="rblock">   Lawrence, Paul J. Leach, Ari Luotonen, and Lawrence C. Stewart for</td><td class="lineno" valign="top"></td></tr>
507      <tr><td class="lineno" valign="top"></td><td class="lblock">   their work on that specification.</td><td> </td><td class="rblock">   their work on that specification.  <span class="insert">See Section 6 of [RFC2617] for</span></td><td class="lineno" valign="top"></td></tr>
508      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   further acknowledgements.</span></td><td class="lineno" valign="top"></td></tr>
509      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
510      <tr><td><a name="diff0031" /></td></tr>
511      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">[[acks: HTTPbis acknowledgements.]]</span></td><td> </td><td class="rblock">   <span class="insert">See Section 12 of [Part1] for the Acknowledgments related to this</span></td><td class="lineno" valign="top"></td></tr>
512      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   document revision.</span></td><td class="lineno" valign="top"></td></tr>
513      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
514      <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>
515      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
516      <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>
517      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
518      <tr><td class="lineno" valign="top"></td><td class="left">   [Part1]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part1]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
519      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td> </td><td class="right">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td class="lineno" valign="top"></td></tr>
520      <tr><td class="lineno" valign="top"></td><td class="left">              and J. Reschke, Ed., "HTTP/1.1, part 1: URIs, Connections,</td><td> </td><td class="right">              and J. Reschke, Ed., "HTTP/1.1, part 1: URIs, Connections,</td><td class="lineno" valign="top"></td></tr>
521      <tr><td><a name="diff0032" /></td></tr>
522      <tr><td class="lineno" valign="top"></td><td class="lblock">              and Message Parsing", <span class="delete">draft-ietf-httpbis-p1-messaging-15</span></td><td> </td><td class="rblock">              and Message Parsing", <span class="insert">draft-ietf-httpbis-p1-messaging-16</span></td><td class="lineno" valign="top"></td></tr>
523      <tr><td class="lineno" valign="top"></td><td class="lblock">              (work in progress), <span class="delete">July</span> 2011.</td><td> </td><td class="rblock">              (work in progress), <span class="insert">August</span> 2011.</td><td class="lineno" valign="top"></td></tr>
524      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
525      <tr><td class="lineno" valign="top"></td><td class="left">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [Part6]    Fielding, R., Ed., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
526      <tr><td class="lineno" valign="top"></td><td class="left">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td> </td><td class="right">              Masinter, L., Leach, P., Berners-Lee, T., Lafon, Y., Ed.,</td><td class="lineno" valign="top"></td></tr>
527      <tr><td class="lineno" valign="top"></td><td class="left">              Nottingham, M., Ed., and J. Reschke, Ed., "HTTP/1.1, part</td><td> </td><td class="right">              Nottingham, M., Ed., and J. Reschke, Ed., "HTTP/1.1, part</td><td class="lineno" valign="top"></td></tr>
528      <tr><td><a name="diff0033" /></td></tr>
529      <tr><td class="lineno" valign="top"></td><td class="lblock">              6: Caching", <span class="delete">draft-ietf-httpbis-p6-cache-15</span> (work in</td><td> </td><td class="rblock">              6: Caching", <span class="insert">draft-ietf-httpbis-p6-cache-16</span> (work in</td><td class="lineno" valign="top"></td></tr>
530      <tr><td class="lineno" valign="top"></td><td class="lblock">              progress), <span class="delete">July</span> 2011.</td><td> </td><td class="rblock">              progress), <span class="insert">August</span> 2011.</td><td class="lineno" valign="top"></td></tr>
531      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
532      <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>
533      <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>
534      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
535      <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>
536      <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>
537      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
538      <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>
539      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
540      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td> </td><td class="right">   [RFC2616]  Fielding, R., Gettys, J., Mogul, J., Frystyk, H.,</td><td class="lineno" valign="top"></td></tr>
541      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
542      <tr bgcolor="gray" ><td></td><th><a name="part-l7" /><small>skipping to change at</small><em> page 12, line 33</em></th><th> </th><th><a name="part-r7" /><small>skipping to change at</small><em> page 14, line 5</em></th><td></td></tr>
543      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
544      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td> </td><td class="right">   [RFC2617]  Franks, J., Hallam-Baker, P., Hostetler, J., Lawrence, S.,</td><td class="lineno" valign="top"></td></tr>
545      <tr><td class="lineno" valign="top"></td><td class="left">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td> </td><td class="right">              Leach, P., Luotonen, A., and L. Stewart, "HTTP</td><td class="lineno" valign="top"></td></tr>
546      <tr><td class="lineno" valign="top"></td><td class="left">              Authentication: Basic and Digest Access Authentication",</td><td> </td><td class="right">              Authentication: Basic and Digest Access Authentication",</td><td class="lineno" valign="top"></td></tr>
547      <tr><td class="lineno" valign="top"></td><td class="left">              RFC 2617, June 1999.</td><td> </td><td class="right">              RFC 2617, June 1999.</td><td class="lineno" valign="top"></td></tr>
548      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
549      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC3864]  Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td> </td><td class="right">   [RFC3864]  Klyne, G., Nottingham, M., and J. Mogul, "Registration</td><td class="lineno" valign="top"></td></tr>
550      <tr><td class="lineno" valign="top"></td><td class="left">              Procedures for Message Header Fields", BCP 90, RFC 3864,</td><td> </td><td class="right">              Procedures for Message Header Fields", BCP 90, RFC 3864,</td><td class="lineno" valign="top"></td></tr>
551      <tr><td class="lineno" valign="top"></td><td class="left">              September 2004.</td><td> </td><td class="right">              September 2004.</td><td class="lineno" valign="top"></td></tr>
552      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
553      <tr><td><a name="diff0034" /></td></tr>
554      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">[RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform</span></td><td class="lineno" valign="top"></td></tr>
555      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              Resource Identifier (URI): Generic Syntax", STD 66,</span></td><td class="lineno" valign="top"></td></tr>
556      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              RFC 3986, January 2005.</span></td><td class="lineno" valign="top"></td></tr>
557      <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>
558      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   [RFC4648]  Josefsson, S., "The Base16, Base32, and Base64 Data</span></td><td class="lineno" valign="top"></td></tr>
559      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">              Encodings", RFC 4648, October 2006.</span></td><td class="lineno" valign="top"></td></tr>
560      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
561      <tr><td class="lineno" valign="top"></td><td class="left">   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td> </td><td class="right">   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td class="lineno" valign="top"></td></tr>
562      <tr><td class="lineno" valign="top"></td><td class="left">              IANA Considerations Section in RFCs", BCP 26, RFC 5226,</td><td> </td><td class="right">              IANA Considerations Section in RFCs", BCP 26, RFC 5226,</td><td class="lineno" valign="top"></td></tr>
563      <tr><td class="lineno" valign="top"></td><td class="left">              May 2008.</td><td> </td><td class="right">              May 2008.</td><td class="lineno" valign="top"></td></tr>
564      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
565      <tr><td><a name="diff0035" /></td></tr>
566      <tr><td class="lineno" valign="top"></td><td class="lblock">Appendix A.  Changes from <span class="delete">RFC</span> 2616</td><td> </td><td class="rblock">Appendix A.  Changes from <span class="insert">RFCs</span> 2616 <span class="insert">and 2617</span></td><td class="lineno" valign="top"></td></tr>
567      <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>
568      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The "realm" parameter isn't required anymore in general;</span></td><td class="lineno" valign="top"></td></tr>
569      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   consequently, the ABNF allows challenges without any auth parameters.</span></td><td class="lineno" valign="top"></td></tr>
570      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   (Section 2)</span></td><td class="lineno" valign="top"></td></tr>
571      <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>
572      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   The "b64token" alternative to auth-param lists has been added for</span></td><td class="lineno" valign="top"></td></tr>
573      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   consistency with legacy authentication schemes such as "Basic".</span></td><td class="lineno" valign="top"></td></tr>
574      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   (Section 2)</span></td><td class="lineno" valign="top"></td></tr>
575      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
576      <tr><td class="lineno" valign="top"></td><td class="left">   Change ABNF productions for header fields to only define the field</td><td> </td><td class="right">   Change ABNF productions for header fields to only define the field</td><td class="lineno" valign="top"></td></tr>
577      <tr><td class="lineno" valign="top"></td><td class="left">   value.  (Section 4)</td><td> </td><td class="right">   value.  (Section 4)</td><td class="lineno" valign="top"></td></tr>
578      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
579      <tr><td class="lineno" valign="top"></td><td class="left">Appendix B.  Collected ABNF</td><td> </td><td class="right">Appendix B.  Collected ABNF</td><td class="lineno" valign="top"></td></tr>
580      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
581      <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>
582      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
583      <tr><td><a name="diff0036" /></td></tr>
584      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">BWS = &lt;BWS, defined in [Part1], Section 1.2.2&gt;</span></td><td class="lineno" valign="top"></td></tr>
585      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
586      <tr><td class="lineno" valign="top"></td><td class="left">   OWS = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td> </td><td class="right">   OWS = &lt;OWS, defined in [Part1], Section 1.2.2&gt;</td><td class="lineno" valign="top"></td></tr>
587      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
588      <tr><td class="lineno" valign="top"></td><td class="left">   Proxy-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS</td><td> </td><td class="right">   Proxy-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS</td><td class="lineno" valign="top"></td></tr>
589      <tr><td class="lineno" valign="top"></td><td class="left">    challenge ] )</td><td> </td><td class="right">    challenge ] )</td><td class="lineno" valign="top"></td></tr>
590      <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>
591      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
592      <tr><td class="lineno" valign="top"></td><td class="left">   WWW-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS challenge</td><td> </td><td class="right">   WWW-Authenticate = *( "," OWS ) challenge *( OWS "," [ OWS challenge</td><td class="lineno" valign="top"></td></tr>
593      <tr><td class="lineno" valign="top"></td><td class="left">    ] )</td><td> </td><td class="right">    ] )</td><td class="lineno" valign="top"></td></tr>
594      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
595      <tr><td><a name="diff0037" /></td></tr>
596      <tr><td class="lineno" valign="top"></td><td class="lblock">   auth-param = token <span class="delete">"="</span> ( token / quoted-string )</td><td> </td><td class="rblock">   auth-param = token <span class="insert">BWS "=" BWS</span> ( token / quoted-string )</td><td class="lineno" valign="top"></td></tr>
597      <tr><td class="lineno" valign="top"></td><td class="left">   auth-scheme = token</td><td> </td><td class="right">   auth-scheme = token</td><td class="lineno" valign="top"></td></tr>
598      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
599      <tr><td><a name="diff0038" /></td></tr>
600      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">challenge</span> = <span class="delete">auth-scheme 1*SP *( "," OWS ) auth-param *( OWS "," [ OWS</span></td><td> </td><td class="rblock">   <span class="insert">b64token</span> = <span class="insert">1*( ALPHA</span> / <span class="insert">DIGIT</span> / <span class="insert">"-"</span> / <span class="insert">"." / "_" / "~" / "+" / "/"</span> )</td><td class="lineno" valign="top"></td></tr>
601      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">    auth-param ] )</span></td><td> </td><td class="rblock">    <span class="insert">*"="</span></td><td class="lineno" valign="top"></td></tr>
602      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">   credentials = auth-scheme ( token</span> / <span class="delete">quoted-string</span> / <span class="delete">[ ( ","</span> /</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
603      <tr><td class="lineno" valign="top"></td><td class="lblock">    <span class="delete">auth-param ) *( OWS "," [ OWS auth-param ] ) ]</span> )</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
604      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
605      <tr><td><a name="diff0039" /></td></tr>
606      <tr><td class="lineno" valign="top"></td><td class="lblock">   <span class="delete">quoted-string</span> = <span class="delete">&lt;quoted-string, defined in [Part1], Section 1.2.2&gt;</span></td><td> </td><td class="rblock">   <span class="insert">challenge</span> = <span class="insert">auth-scheme [ 1*SP ( b64token / [ ( "," / auth-param ) *(</span></td><td class="lineno" valign="top"></td></tr>
607      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">    OWS "," [ OWS auth-param ] ) ] ) ]</span></td><td class="lineno" valign="top"></td></tr>
608      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   credentials = auth-scheme [ 1*SP ( b64token / [ ( "," / auth-param )</span></td><td class="lineno" valign="top"></td></tr>
609      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">    *( OWS "," [ OWS auth-param ] ) ] ) ]</span></td><td class="lineno" valign="top"></td></tr>
610      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
611      <tr><td><a name="diff0040" /></td></tr>
612      <tr><td class="lineno" valign="top"></td><td class="lblock">   realm = <span class="delete">"realm="</span> realm-value</td><td> </td><td class="rblock">   <span class="insert">quoted-string = &lt;quoted-string, defined in [Part1], Section 3.2.3&gt;</span></td><td class="lineno" valign="top"></td></tr>
613      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
614      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   realm = <span class="insert">"realm" BWS "=" BWS</span> realm-value</td><td class="lineno" valign="top"></td></tr>
615      <tr><td class="lineno" valign="top"></td><td class="left">   realm-value = quoted-string</td><td> </td><td class="right">   realm-value = quoted-string</td><td class="lineno" valign="top"></td></tr>
616      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
617      <tr><td><a name="diff0041" /></td></tr>
618      <tr><td class="lineno" valign="top"></td><td class="lblock">   token = &lt;token, defined in [Part1], Section <span class="delete">1.2.2</span>&gt;</td><td> </td><td class="rblock">   token = &lt;token, defined in [Part1], Section <span class="insert">3.2.3</span>&gt;</td><td class="lineno" valign="top"></td></tr>
619      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
620      <tr><td class="lineno" valign="top"></td><td class="left">   ABNF diagnostics:</td><td> </td><td class="right">   ABNF diagnostics:</td><td class="lineno" valign="top"></td></tr>
621      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
622      <tr><td class="lineno" valign="top"></td><td class="left">   ; Authorization defined but not used</td><td> </td><td class="right">   ; Authorization defined but not used</td><td class="lineno" valign="top"></td></tr>
623      <tr><td class="lineno" valign="top"></td><td class="left">   ; Proxy-Authenticate defined but not used</td><td> </td><td class="right">   ; Proxy-Authenticate defined but not used</td><td class="lineno" valign="top"></td></tr>
624      <tr><td class="lineno" valign="top"></td><td class="left">   ; Proxy-Authorization defined but not used</td><td> </td><td class="right">   ; Proxy-Authorization defined but not used</td><td class="lineno" valign="top"></td></tr>
625      <tr><td class="lineno" valign="top"></td><td class="left">   ; WWW-Authenticate defined but not used</td><td> </td><td class="right">   ; WWW-Authenticate defined but not used</td><td class="lineno" valign="top"></td></tr>
626      <tr><td class="lineno" valign="top"></td><td class="left">   ; realm defined but not used</td><td> </td><td class="right">   ; realm defined but not used</td><td class="lineno" valign="top"></td></tr>
627      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
628      <tr><td class="lineno" valign="top"></td><td class="left">Appendix C.  Change Log (to be removed by RFC Editor before publication)</td><td> </td><td class="right">Appendix C.  Change Log (to be removed by RFC Editor before publication)</td><td class="lineno" valign="top"></td></tr>
629      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
630      <tr bgcolor="gray" ><td></td><th><a name="part-l8" /><small>skipping to change at</small><em> page 14, line 26</em></th><th> </th><th><a name="part-r8" /><small>skipping to change at</small><em> page 16, line 33</em></th><td></td></tr>
631      <tr><td class="lineno" valign="top"></td><td class="left">C.4.  Since draft-ietf-httpbis-p7-auth-02</td><td> </td><td class="right">C.4.  Since draft-ietf-httpbis-p7-auth-02</td><td class="lineno" valign="top"></td></tr>
632      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
633      <tr><td class="lineno" valign="top"></td><td class="left">   Ongoing work on IANA Message Header Field Registration</td><td> </td><td class="right">   Ongoing work on IANA Message Header Field Registration</td><td class="lineno" valign="top"></td></tr>
634      <tr><td class="lineno" valign="top"></td><td class="left">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td> </td><td class="right">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/40&gt;):</td><td class="lineno" valign="top"></td></tr>
635      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
636      <tr><td class="lineno" valign="top"></td><td class="left">   o  Reference RFC 3984, and update header field registrations for</td><td> </td><td class="right">   o  Reference RFC 3984, and update header field registrations for</td><td class="lineno" valign="top"></td></tr>
637      <tr><td class="lineno" valign="top"></td><td class="left">      header fields defined in this document.</td><td> </td><td class="right">      header fields defined in this document.</td><td class="lineno" valign="top"></td></tr>
638      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
639      <tr><td class="lineno" valign="top"></td><td class="left">C.5.  Since draft-ietf-httpbis-p7-auth-03</td><td> </td><td class="right">C.5.  Since draft-ietf-httpbis-p7-auth-03</td><td class="lineno" valign="top"></td></tr>
640      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
641      <tr><td><a name="diff0042" /></td></tr>
642      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">   <span class="insert">None.</span></td><td class="lineno" valign="top"></td></tr>
643      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
644      <tr><td class="lineno" valign="top"></td><td class="left">C.6.  Since draft-ietf-httpbis-p7-auth-04</td><td> </td><td class="right">C.6.  Since draft-ietf-httpbis-p7-auth-04</td><td class="lineno" valign="top"></td></tr>
645      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
646      <tr><td class="lineno" valign="top"></td><td class="left">   Ongoing work on ABNF conversion</td><td> </td><td class="right">   Ongoing work on ABNF conversion</td><td class="lineno" valign="top"></td></tr>
647      <tr><td class="lineno" valign="top"></td><td class="left">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/36&gt;):</td><td> </td><td class="right">   (&lt;http://tools.ietf.org/wg/httpbis/trac/ticket/36&gt;):</td><td class="lineno" valign="top"></td></tr>
648      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
649      <tr><td class="lineno" valign="top"></td><td class="left">   o  Use "/" instead of "|" for alternatives.</td><td> </td><td class="right">   o  Use "/" instead of "|" for alternatives.</td><td class="lineno" valign="top"></td></tr>
650      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
651      <tr><td class="lineno" valign="top"></td><td class="left">   o  Introduce new ABNF rules for "bad" whitespace ("BWS"), optional</td><td> </td><td class="right">   o  Introduce new ABNF rules for "bad" whitespace ("BWS"), optional</td><td class="lineno" valign="top"></td></tr>
652      <tr><td class="lineno" valign="top"></td><td class="left">      whitespace ("OWS") and required whitespace ("RWS").</td><td> </td><td class="right">      whitespace ("OWS") and required whitespace ("RWS").</td><td class="lineno" valign="top"></td></tr>
653      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
654      <tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
655      <tr bgcolor="gray" ><td></td><th><a name="part-l9" /><small>skipping to change at</small><em> page 16, line 16</em></th><th> </th><th><a name="part-r9" /><small>skipping to change at</small><em> page 18, line 23</em></th><td></td></tr>
656      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
657      <tr><td class="lineno" valign="top"></td><td class="left">   Closed issues:</td><td> </td><td class="right">   Closed issues:</td><td class="lineno" valign="top"></td></tr>
658      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
659      <tr><td class="lineno" valign="top"></td><td class="left">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/276&gt;: "untangle</td><td> </td><td class="right">   o  &lt;http://tools.ietf.org/wg/httpbis/trac/ticket/276&gt;: "untangle</td><td class="lineno" valign="top"></td></tr>
660      <tr><td class="lineno" valign="top"></td><td class="left">      ABNFs for header fields"</td><td> </td><td class="right">      ABNFs for header fields"</td><td class="lineno" valign="top"></td></tr>
661      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
662      <tr><td class="lineno" valign="top"></td><td class="left">C.16.  Since draft-ietf-httpbis-p7-auth-14</td><td> </td><td class="right">C.16.  Since draft-ietf-httpbis-p7-auth-14</td><td class="lineno" valign="top"></td></tr>
663      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
664      <tr><td class="lineno" valign="top"></td><td class="left">   None.</td><td> </td><td class="right">   None.</td><td class="lineno" valign="top"></td></tr>
665      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
666      <tr><td><a name="diff0043" /></td></tr>
667      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">C.17.  Since draft-ietf-httpbis-p7-auth-15</span></td><td class="lineno" valign="top"></td></tr>
668      <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>
669      <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>
670      <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>
671      <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/78&gt;: "Relationship</span></td><td class="lineno" valign="top"></td></tr>
672      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      between 401, Authorization and WWW-Authenticate"</span></td><td class="lineno" valign="top"></td></tr>
673      <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>
674      <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/177&gt;: "Realm</span></td><td class="lineno" valign="top"></td></tr>
675      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      required on challenges"</span></td><td class="lineno" valign="top"></td></tr>
676      <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>
677      <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/195&gt;: "auth-param</span></td><td class="lineno" valign="top"></td></tr>
678      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      syntax"</span></td><td class="lineno" valign="top"></td></tr>
679      <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>
680      <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/257&gt;:</span></td><td class="lineno" valign="top"></td></tr>
681      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      "Considerations for new authentications schemes"</span></td><td class="lineno" valign="top"></td></tr>
682      <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>
683      <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/287&gt;: "LWS in auth-</span></td><td class="lineno" valign="top"></td></tr>
684      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      param ABNF"</span></td><td class="lineno" valign="top"></td></tr>
685      <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>
686      <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/309&gt;: "credentials</span></td><td class="lineno" valign="top"></td></tr>
687      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      ABNF missing SP (still using implied LWS?)"</span></td><td class="lineno" valign="top"></td></tr>
688      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">                                                                         </td><td class="lineno" valign="top"></td></tr>
689      <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>
690      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
691      <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>
692      <tr><td><a name="diff0044" /></td></tr>
693      <tr><td class="lineno" valign="top"></td><td class="lblock">      401 Unauthorized (status code)  <span class="delete">7</span></td><td> </td><td class="rblock">      401 Unauthorized (status code)  <span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
694      <tr><td class="lineno" valign="top"></td><td class="lblock">      407 Proxy Authentication Required (status code)  <span class="delete">7</span></td><td> </td><td class="rblock">      407 Proxy Authentication Required (status code)  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
695      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
696      <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>
697      <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>
698      <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>
699      <tr><td><a name="diff0045" /></td></tr>
700      <tr><td class="lineno" valign="top"></td><td class="lblock">      Authorization header field  <span class="delete">8</span></td><td> </td><td class="rblock">      Authorization header field  <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
701      <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>
702      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">   B</span></td><td class="lineno" valign="top"></td></tr>
703      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">      b64token  5</span></td><td class="lineno" valign="top"></td></tr>
704      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
705      <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>
706      <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>
707      <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>
708      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
709      <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>
710      <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>
711      <tr><td><a name="diff0046" /></td></tr>
712      <tr><td class="lineno" valign="top"></td><td class="lblock">         Authorization  <span class="delete">8</span></td><td> </td><td class="rblock">         <span class="insert">auth-param  5</span></td><td class="lineno" valign="top"></td></tr>
713      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">         Proxy-Authenticate</span>  9</td><td> </td><td class="rblock"><span class="insert">         auth-scheme  5</span></td><td class="lineno" valign="top"></td></tr>
714      <tr><td class="lineno" valign="top"></td><td class="lblock">         Proxy-Authorization  <span class="delete">9</span></td><td> </td><td class="rblock">         Authorization  9</td><td class="lineno" valign="top"></td></tr>
715      <tr><td class="lineno" valign="top"></td><td class="lblock">         WWW-Authenticate  <span class="delete">9</span></td><td> </td><td class="rblock">         <span class="insert">b64token  5</span></td><td class="lineno" valign="top"></td></tr>
716      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         challenge  5</span></td><td class="lineno" valign="top"></td></tr>
717      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         credentials  6</span></td><td class="lineno" valign="top"></td></tr>
718      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         Proxy-Authenticate  10</span></td><td class="lineno" valign="top"></td></tr>
719      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">         Proxy-Authorization  <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
720      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">         realm  7</span></td><td class="lineno" valign="top"></td></tr>
721      <tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">         WWW-Authenticate  <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
722      <tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
723      <tr><td class="lineno" valign="top"></td><td class="left">   H</td><td> </td><td class="right">   H</td><td class="lineno" valign="top"></td></tr>
724      <tr><td class="lineno" valign="top"></td><td class="left">      Header Fields</td><td> </td><td class="right">      Header Fields</td><td class="lineno" valign="top"></td></tr>
725      <tr><td><a name="diff0047" /></td></tr>
726      <tr><td class="lineno" valign="top"></td><td class="lblock">         Authorization  <span class="delete">8</span></td><td> </td><td class="rblock">         Authorization  9</td><td class="lineno" valign="top"></td></tr>
727      <tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete">         Proxy-Authenticate</span>  9</td><td> </td><td class="rblock">         <<