Wed Oct 27 04:18:01 UTC 2010  pix@kepibu.org
  * Initial version
diff -rN -u old-httpauth/ajax-login.php new-httpauth/ajax-login.php
--- old-httpauth/ajax-login.php	1970-01-01 00:00:00.000000000 +0000
+++ new-httpauth/ajax-login.php	2015-04-15 15:00:35.000000000 +0000
@@ -0,0 +1,13 @@
+<?php
+
+if ('authenticate' === $_SERVER['PHP_AUTH_USER'] &&
+    'successfully' === $_SERVER['PHP_AUTH_PW']) {
+  header('HTTP/1.1 200 OK');
+} elseif ($_SERVER['PHP_AUTH_USER'] || $_SERVER['PHP_AUTH_PW']) {
+  /* Suppress the browser's login UI */
+  header('HTTP/1.1 403 Invalid Credentials');
+  header('WWW-Authenticate: Basic Realm="Form-Based HTTP Auth Test"', false, 403);
+} else {
+  header('HTTP/1.1 401 Log In, Bitches');
+  header('WWW-Authenticate: Basic Realm="Form-Based HTTP Auth Test"', false, 401);
+}
diff -rN -u old-httpauth/form-to-http-auth.js new-httpauth/form-to-http-auth.js
--- old-httpauth/form-to-http-auth.js	1970-01-01 00:00:00.000000000 +0000
+++ new-httpauth/form-to-http-auth.js	2015-04-15 15:00:35.000000000 +0000
@@ -0,0 +1,45 @@
+(function () {
+    function hasClass(node,className) {
+        return node.className.match(new RegExp('(\\s|^)'+className+'(\\s|$)'));
+    }
+    function form2httpAuth () {
+        /* Skip if the browser indicates it does this itself. */
+        if (this.className.match(/(\\s|^)natively-supported(\\s|$)/))
+            return true;
+        /* Force the browser to clear the auth credentials. */
+        /*
+        var xhr = $.ajax({
+            url: "/ajax-login.php",
+            async: true,
+            global: false,
+            username: "-",
+            password: "-",
+            dataType: "text"
+        });
+        xhr.abort();
+        */
+        /* Attempt login with provided credentials. */
+        var username = this.username.value;
+        var password = this.password.value;
+        var authed = false;
+        $.ajax({
+            url: "/ajax-login.php",
+            async: false,
+            global: false,
+            username: username,
+            password: password,
+            dataType: 'text',
+            success: function (data, status, xhr) {
+                authed = true;
+            }
+        });
+        /* Don't send username and password if we successfully managed to auth via HTTP */
+        if (authed) {
+            this.username.parentNode.removeChild(this.username);
+            this.password.parentNode.removeChild(this.password);
+        }
+        return true;
+    }
+
+    $("form.http-authentication").submit(form2httpAuth);
+})();
diff -rN -u old-httpauth/jquery.js new-httpauth/jquery.js
--- old-httpauth/jquery.js	1970-01-01 00:00:00.000000000 +0000
+++ new-httpauth/jquery.js	2015-04-15 15:00:35.000000000 +0000
@@ -0,0 +1,166 @@
+/*!
+ * jQuery JavaScript Library v1.4.3
+ * http://jquery.com/
+ *
+ * Copyright 2010, John Resig
+ * Dual licensed under the MIT or GPL Version 2 licenses.
+ * http://jquery.org/license
+ *
+ * Includes Sizzle.js
+ * http://sizzlejs.com/
+ * Copyright 2010, The Dojo Foundation
+ * Released under the MIT, BSD, and GPL Licenses.
+ *
+ * Date: Thu Oct 14 23:10:06 2010 -0400
+ */
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+height:"1px",visibility:"hidden"});b.innerHTML="<div style='position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;'><div></div></div><table style='position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;' cellpadding='0' cellspacing='0'><tr><td></td></tr></table>";a.insertBefore(b,a.firstChild);d=b.firstChild;e=d.firstChild;f=d.nextSibling.firstChild.firstChild;this.doesNotAddBorder=e.offsetTop!==5;this.doesAddBorderForTableAndCells=
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diff -rN -u old-httpauth/login.php new-httpauth/login.php
--- old-httpauth/login.php	1970-01-01 00:00:00.000000000 +0000
+++ new-httpauth/login.php	2015-04-15 15:00:35.000000000 +0000
@@ -0,0 +1,56 @@
+<?php
+
+if ('GET' === $_SERVER['REQUEST_METHOD']) {
+  header('HTTP/1.1 200 Log In Optional');
+  header('WWW-Authenticate: Basic Realm="Form-Based HTTP Auth Test"', false, 200);
+} else {
+  /* When authenticating, always check the POSTed credentials, and only if no
+     credentials were posted check the HTTP Auth credentials.  There are several
+     edge cases which will result in there being both a set of POST credentials
+     and a set of HTTP credentials, and the two may not necessarily be the same.
+     Any time you get both, the POST credentials are the ones you can expect to
+     be the ones most recently supplied by the user.
+
+     You should also keep this in mind when dealing with actual sessions: just
+     because you're getting HTTP Auth credentials from the browser doesn't mean
+     you /should/ be.  Not being able to tell the browser to forget credentials
+     is a real drag--if you're getting both HTTP Auth and a session cookie,
+     you've got to trust the cookie over the HA. */
+  $username = array_key_exists('username', $_POST) ? $_POST['username'] : $_SERVER['PHP_AUTH_USER'];
+  $password = array_key_exists('password', $_POST) ? $_POST['password'] : $_SERVER['PHP_AUTH_PW'];
+}
+
+?><!doctype html>
+<html>
+<head><title>Form-based HTTP Auth Login Test</title></head>
+<body>
+<h1><?php
+if ('authenticate' === $username && 'successfully' == $password) {
+  echo "Auth Success!";
+} elseif ($username || $password) {
+  echo "Auth Failure!";
+} else {
+  echo "Form-based HTTP Auth Login Test";
+}
+?></h1>
+
+<?php if ('POST' === $_SERVER['REQUEST_METHOD']) { ?>
+<p>Have your credentials and some XSS.</p>
+<p>Attempted to auth with <q><?php echo $username; ?></q> and <q><?php echo $password; ?></q>.</p>
+<pre>HTTP Username: <?php echo $_SERVER['PHP_AUTH_USER'] . "\n"; ?>
+HTTP Password: <?php echo $_SERVER['PHP_AUTH_PW'] . "\n"; ?>
+POSTED: <?php print_r($_POST); ?></pre>
+<?php } else { ?>
+<p>For a successful authentication, try username "authenticate" with password "successfully".  For a failing authentication, try username "fail" with password "whale".</p>
+<?php } ?>
+
+<form action='/login.php' method='post' class='http-authentication'>
+<label for='theusername'>Username: <input type='textbox' name='username' id='theusername'></label>
+<label for='thepassword'>Password: <input type='password' name='password' id='thepassword'></label>
+<button type='submit' name='authme' value='yea'>Authenticate Me!</button>
+</form>
+
+<script src='/jquery.js'></script>
+<script src='/form-to-http-auth.js'></script>
+</body>
+</html>
\ No newline at end of file
diff -rN -u old-httpauth/notes.org new-httpauth/notes.org
--- old-httpauth/notes.org	1970-01-01 00:00:00.000000000 +0000
+++ new-httpauth/notes.org	2015-04-15 15:00:35.000000000 +0000
@@ -0,0 +1,80 @@
+* Site-Controlled HTTP Authentication UI
+** Motivation
+HTTP Authentication is significantly less fundamentally broken than cookie-based
+authentication.  And, while I've been meaning to write this up for years, the
+recent release of [[http://codebutler.com/firesheep][Firesheep]] has brought the issue to the fore once again.
+
+[tdm] explains many of the issues involved, so I'll just summarize briefly:
+ 1. The browser UI for HTTP Authentication sucks
+ 2. Websites want to control that UI
+
+A natural consequence of these two things is that no sites use HTTP
+Authentication, and browser vendors don't bother to make it not suck.
+
+This is my proposal to make HTTP Authentication website-controlled, while
+remaining backwards compatible with form-based authentication in browsers which
+do not support the proposal.
+** Proposal
+*** HTML Forms
+Login forms need add only a single class to their <form> tag:
+"http-authentication".  This class signals to the browser that it should use the
+"username" and "password" fields for this form as the corresponding fields in
+HTTP Authentication.  These fields MUST NOT be submitted with the rest of the
+form when using HTTP Authentication.
+
+Any additional information necessary to perform authentication (nonces, etc.)
+should be pulled from the standard WWW-Authenticate headers.
+
+Any fields in the login form not understood by the browser as part of a login
+request MUST be submitted as normal for the provided form.
+*** Changes to RFC 2617
+WWW-Authenticate headers MAY be sent along with 2xy and 3xy responses to
+indicate that a page supports optional authentication.  Vary: Authorization and
+appropriate Cache-Control headers should be used when doing so to allow caches
+to work properly.
+
+A browser using form-based HTTP Authentication MAY use data acquired from a
+WWW-Authenticate header sent with the form to authenticate itself without the
+additional round-trip that would otherwise be required.
+*** Stopgap Measure
+To use this feature before sites implement it, sites may use JavaScript
+techniques along the lines of [peej] to silently force the browser into HTTP
+Authentication.
+
+I've set up a (very rough) example at http://httpauth.kepibu.org/login.php.  The
+source code contains additional comments relevant to implementers of the stopgap
+measure and can be fetched as a darcs repository via the command
+:  darcs get http://code.kepibu.org/httpauth/
+
+*** Working with the Stopgap Measure in Browsers that Support This Spec
+Assuming sites implement the stopgap measure, and browsers later introduce
+native support for this specification, it becomes important for browsers and
+sites to communicate with each other about who is in charge of handling the
+form-to-http-auth transition.
+
+As someone who loathes the number of sites that fall apart with JS disabled, it
+is tempting to simply say browsers should refuse to fire JavaScript events on
+the submission of http-authentication forms.  However, since sites will almost
+certainly be doing other things in the JavaScript for those forms, that is not a
+viable option.
+
+Instead, I propose that any browser which supports form-based HTTP Auth should
+add the class 'natively-supported' to forms requesting http authentication.
+This will allow sites to easily detect native support and avoid running their
+own JavaScript-based form-to-http-auth translators.
+*** Logging Out
+Forcing logout for users is left to a future version of this specification.  See
+[tdm] for ideas.
+** References
+ * [tdm]  :: Weaning the Web off of Session Cookies (Timothy Morgan, 26 Jan 2010)
+   http://www.vsecurity.com/download/papers/WeaningTheWebOffOfSessionCookies.pdf
+ * [peej] :: HTTP Authentication with HTML Forms (Paul James, 03 Feb 2006)
+   http://www.peej.co.uk/articles/http-auth-with-html-forms.html
+ * [ha]   :: HTTP Authentication: Basic and Digest Authentication (RFC 2617, Jun 1999)
+   http://tools.ietf.org/html/rfc2617
+ * [w3]   :: User Agent Authentication Forms (W3C Note, 03 Feb 1999)
+   http://www.w3.org/TR/NOTE-authentform
+* flyspell                                                         :noexport:
+LocalWords:  UI LocalWords Firesheep peej authentform html tdm Login http login
+LocalWords:  username nonces pdf JavaScript auth JS natively logout xy darcs
+//  LocalWords:  php