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25 <div id="preamble"><h1>Apache Module mod_auth_form</h1>
27 <p><span>Available Languages: </span><a href="../en/mod/mod_auth_form.html" title="English"> en </a></p>
29 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Form authentication</td></tr>
30 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
31 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>auth_form_module</td></tr>
32 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_auth_form.c</td></tr>
33 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
36 <div class="warning"><h3>Warning</h3>
37 <p>Form authentication depends on the <code class="module"><a href="../mod/mod_session.html">mod_session</a></code>
38 modules, and these modules make use of HTTP cookies, and as such can fall
39 victim to Cross Site Scripting attacks, or expose potentially private
40 information to clients. Please ensure that the relevant risks have
41 been taken into account before enabling the session functionality on
45 <p>This module allows the use of an HTML login form to restrict access
46 by looking up users in the given providers. HTML forms require
47 significantly more configuration than the alternatives, however an
48 HTML login form can provide a much friendlier experience for end users.
51 <p>HTTP basic authentication is provided by
52 <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>, and HTTP digest authentication is
53 provided by <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>. This module should
54 be combined with at least one authentication module
55 such as <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and one authorization
56 module such as <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>.</p>
58 <p>Once the user has been successfully authenticated, the user's login
59 details will be stored in a session provided by <code class="module"><a href="../mod/mod_session.html">mod_session</a></code>.
63 <div id="quickview"><h3 class="directives">Directives</h3>
65 <li><img alt="" src="../images/down.gif" /> <a href="#authformauthoritative">AuthFormAuthoritative</a></li>
66 <li><img alt="" src="../images/down.gif" /> <a href="#authformbody">AuthFormBody</a></li>
67 <li><img alt="" src="../images/down.gif" /> <a href="#authformdisablenostore">AuthFormDisableNoStore</a></li>
68 <li><img alt="" src="../images/down.gif" /> <a href="#authformfakebasicauth">AuthFormFakeBasicAuth</a></li>
69 <li><img alt="" src="../images/down.gif" /> <a href="#authformlocation">AuthFormLocation</a></li>
70 <li><img alt="" src="../images/down.gif" /> <a href="#authformloginrequiredlocation">AuthFormLoginRequiredLocation</a></li>
71 <li><img alt="" src="../images/down.gif" /> <a href="#authformloginsuccesslocation">AuthFormLoginSuccessLocation</a></li>
72 <li><img alt="" src="../images/down.gif" /> <a href="#authformlogoutlocation">AuthFormLogoutLocation</a></li>
73 <li><img alt="" src="../images/down.gif" /> <a href="#authformmethod">AuthFormMethod</a></li>
74 <li><img alt="" src="../images/down.gif" /> <a href="#authformmimetype">AuthFormMimetype</a></li>
75 <li><img alt="" src="../images/down.gif" /> <a href="#authformpassword">AuthFormPassword</a></li>
76 <li><img alt="" src="../images/down.gif" /> <a href="#authformprovider">AuthFormProvider</a></li>
77 <li><img alt="" src="../images/down.gif" /> <a href="#authformsitepassphrase">AuthFormSitePassphrase</a></li>
78 <li><img alt="" src="../images/down.gif" /> <a href="#authformsize">AuthFormSize</a></li>
79 <li><img alt="" src="../images/down.gif" /> <a href="#authformusername">AuthFormUsername</a></li>
83 <li><img alt="" src="../images/down.gif" /> <a href="#basicconfig">Basic Configuration</a></li>
84 <li><img alt="" src="../images/down.gif" /> <a href="#standalone">Standalone Login</a></li>
85 <li><img alt="" src="../images/down.gif" /> <a href="#inline">Inline Login</a></li>
86 <li><img alt="" src="../images/down.gif" /> <a href="#inlinepreservebody">Inline Login with Body Preservation</a></li>
87 <li><img alt="" src="../images/down.gif" /> <a href="#loggingout">Logging Out</a></li>
88 <li><img alt="" src="../images/down.gif" /> <a href="#urlencoding">Usernames and Passwords</a></li>
89 </ul><h3>See also</h3>
91 <li><code class="module"><a href="../mod/mod_session.html">mod_session</a></code></li>
92 <li><code class="directive"><a href="../mod/mod_authn_core.html#authname">AuthName</a></code></li>
93 <li><code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code></li>
94 <li><code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code></li>
95 <li><a href="../howto/auth.html">Authentication howto</a></li>
97 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
99 <h2><a name="basicconfig" id="basicconfig">Basic Configuration</a></h2>
101 <p>To protect a particular URL with <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code>, you need to
102 decide where you will store your <var>session</var>, and you will need to
103 decide what method you will use to authenticate. In this simple example, the
104 login details will be stored in a session based on
105 <code class="module"><a href="../mod/mod_session_cookie.html">mod_session_cookie</a></code>, and authentication will be attempted against
106 a file using <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>. If authentication is unsuccessful,
107 the user will be redirected to the form login page.</p>
109 <div class="example"><h3>Basic example</h3><p><code>
110 <pre class="prettyprint lang-config">
111 AuthFormProvider file
112 AuthUserFile conf/passwd
115 AuthFormLoginRequiredLocation http://example.com/login.html
117 SessionCookieName session path=/
118 SessionCryptoPassphrase secret
123 <p>The directive <code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code> will enable
124 the <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> authentication when set to the value <var>form</var>.
125 The directives <code class="directive"><a href="#authformprovider">AuthFormProvider</a></code> and
126 <code class="directive"><a href="../mod/mod_authn_file.html#authuserfile">AuthUserFile</a></code> specify that usernames
127 and passwords should be checked against the chosen file.</p>
129 <p>The directives <code class="directive"><a href="../mod/mod_session.html#session">Session</a></code>,
130 <code class="directive"><a href="../mod/mod_session_cookie.html#sessioncookiename">SessionCookieName</a></code> and
131 <code class="directive"><a href="../mod/mod_session_crypto.html#sessioncryptopassphrase">SessionCryptoPassphrase</a></code> create an
132 encrypted session stored within an HTTP cookie on the browser. For more information
133 on the different options for configuring a session, read the documentation for
134 <code class="module"><a href="../mod/mod_session.html">mod_session</a></code>.</p>
136 <p>In the simple example above, a URL has been protected by
137 <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code>, but the user has yet to be given an opportunity to
138 enter their username and password. Options for doing so include providing a
139 dedicated standalone login page for this purpose, or for providing the login
141 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
142 <div class="section">
143 <h2><a name="standalone" id="standalone">Standalone Login</a></h2>
145 <p>The login form can be hosted as a standalone page, or can be provided inline on
148 <p>When configuring the login as a standalone page, unsuccessful authentication
149 attempts should be redirected to a login form created by the website for this purpose,
150 using the <code class="directive"><a href="#authformloginrequiredlocation">AuthFormLoginRequiredLocation</a></code>
151 directive. Typically this login page will contain an HTML form, asking the user to
152 provide their usename and password.</p>
154 <div class="example"><h3>Example login form</h3><p><code>
155 <form method="POST" action="/dologin.html"><br />
156 Username: <input type="text" name="httpd_username" value="" /><br />
157 Password: <input type="password" name="httpd_password" value="" /><br />
158 <input type="submit" name="login" value="Login" /><br />
162 <p>The part that does the actual login is handled by the <var>form-login-handler</var>.
163 The action of the form should point at this handler, which is configured within
164 Apache httpd as follows:</p>
166 <div class="example"><h3>Form login handler example</h3><p><code>
167 <pre class="prettyprint lang-config">
168 <Location /dologin.html>
169 SetHandler form-login-handler
170 AuthFormLoginRequiredLocation http://example.com/login.html
171 AuthFormLoginSuccessLocation http://example.com/success.html
172 AuthFormProvider file
173 AuthUserFile conf/passwd
177 SessionCookieName session path=/
178 SessionCryptoPassphrase secret
184 <p>The URLs specified by the
185 <code class="directive"><a href="#authformloginrequiredlocation">AuthFormLoginRequiredLocation</a></code> directive will typically
186 point to a page explaining to the user that their login attempt was unsuccessful, and they
187 should try again. The <code class="directive"><a href="#authformloginsuccesslocation">AuthFormLoginSuccessLocation</a></code>
188 directive specifies the URL the user should be redirected to upon successful login.</p>
190 <p>Alternatively, the URL to redirect the user to on success can be embedded within the login
191 form, as in the example below. As a result, the same <var>form-login-handler</var> can be
192 reused for different areas of a website.</p>
194 <div class="example"><h3>Example login form with location</h3><p><code>
195 <form method="POST" action="/dologin.html"><br />
196 <span class="indent">
197 Username: <input type="text" name="httpd_username" value="" /><br />
198 Password: <input type="password" name="httpd_password" value="" /><br />
199 <input type="submit" name="login" value="Login" /><br />
200 <input type="hidden" name="httpd_location" value="http://example.com/success.html" /><br />
205 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
206 <div class="section">
207 <h2><a name="inline" id="inline">Inline Login</a></h2>
209 <div class="warning"><h3>Warning</h3>
210 <p>A risk exists that under certain circumstances, the login form configured
211 using inline login may be submitted more than once, revealing login credentials to
212 the application running underneath. The administrator must ensure that the underlying
213 application is properly secured to prevent abuse. If in doubt, use the
214 standalone login configuration.</p>
217 <p>As an alternative to having a dedicated login page for a website, it is possible to
218 configure <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> to authenticate users inline, without being
219 redirected to another page. This allows the state of the current page to be preserved
220 during the login attempt. This can be useful in a situation where a time limited
221 session is in force, and the session times out in the middle of the user request. The
222 user can be re-authenticated in place, and they can continue where they left off.</p>
224 <p>If a non-authenticated user attempts to access a page protected by
225 <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> that isn't configured with a
226 <code class="directive"><a href="#authformloginrequiredlocation">AuthFormLoginRequiredLocation</a></code> directive,
227 a <var>HTTP_UNAUTHORIZED</var> status code is returned to the browser indicating to the user
228 that they are not authorized to view the page.</p>
230 <p>To configure inline authentication, the administrator overrides the error document
231 returned by the <var>HTTP_UNAUTHORIZED</var> status code with a custom error document
232 containing the login form, as follows:</p>
234 <div class="example"><h3>Basic inline example</h3><p><code>
235 <pre class="prettyprint lang-config">
236 AuthFormProvider file
237 ErrorDocument 401 /login.shtml
238 AuthUserFile conf/passwd
241 AuthFormLoginRequiredLocation http://example.com/login.html
243 SessionCookieName session path=/
244 SessionCryptoPassphrase secret
249 <p>The error document page should contain a login form with an empty action property,
250 as per the example below. This has the effect of submitting the form to
251 the original protected URL, without the page having to know what that
254 <div class="example"><h3>Example inline login form</h3><p><code>
255 <form method="POST" <strong>action=""</strong>><br />
256 <span class="indent">
257 Username: <input type="text" name="httpd_username" value="" /><br />
258 Password: <input type="password" name="httpd_password" value="" /><br />
259 <input type="submit" name="login" value="Login" /><br />
264 <p>When the end user has filled in their login details, the form will make
265 an HTTP POST request to the original password protected URL.
266 <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> will intercept this POST request, and if
267 HTML fields are found present for the username and password, the user
268 will be logged in, and the original password protected URL will be returned
269 to the user as a GET request.</p>
271 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
272 <div class="section">
273 <h2><a name="inlinepreservebody" id="inlinepreservebody">Inline Login with Body Preservation</a></h2>
275 <p>A limitation of the inline login technique described above is that should an
276 HTML form POST have resulted in the request to authenticate or
278 contents of the original form posted by the browser will be lost. Depending on
279 the function of the website, this could present significant inconvenience for the
282 <p><code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> addresses this by allowing the method and body
283 of the original request to be embedded in the login form. If authentication
284 is successful, the original method and body will be retried by Apache httpd, preserving
285 the state of the original request.</p>
287 <p>To enable body preservation, add three additional fields to the login form as
288 per the example below.</p>
290 <div class="example"><h3>Example with body preservation</h3><p><code>
291 <form method="POST" action=""><br />
292 <span class="indent">
293 Username: <input type="text" name="httpd_username" value="" /><br />
294 Password: <input type="password" name="httpd_password" value="" /><br />
295 <input type="submit" name="login" value="Login" /><br />
296 <strong><input type="hidden" name="httpd_method" value="POST" /><br />
297 <input type="hidden" name="httpd_mimetype" value="application/x-www-form-urlencoded" /><br />
298 <input type="hidden" name="httpd_body" value="name1=value1&name2=value2" /></strong><br />
303 <p>How the method, mimetype and body of the original request are embedded within the
304 login form will depend on the platform and technology being used within the website.
307 <p>One option is to use the <code class="module"><a href="../mod/mod_include.html">mod_include</a></code> module along with the
308 <code class="directive"><a href="../mod/mod_request.html#keptbodysize">KeptBodySize</a></code> directive, along with a suitable
309 CGI script to embed the variables in the form.</p>
311 <p>Another option is to render the login form using a CGI script or other dynamic
314 <div class="example"><h3>CGI example</h3><p><code>
315 <pre class="prettyprint lang-config">
316 AuthFormProvider file
317 <strong>ErrorDocument 401 /cgi-bin/login.cgi</strong>
323 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
324 <div class="section">
325 <h2><a name="loggingout" id="loggingout">Logging Out</a></h2>
327 <p>To enable a user to log out of a particular session, configure a page to
328 be handled by the <var>form-logout-handler</var>. Any attempt to access this
329 URL will cause the username and password to be removed from the current
330 session, effectively logging the user out.</p>
333 <code class="directive"><a href="#authformlogoutlocation">AuthFormLogoutLocation</a></code> directive,
334 a URL can be specified that the browser will be redirected to on successful
335 logout. This URL might explain to the user that they have been logged out, and
336 give the user the option to log in again.</p>
338 <div class="example"><h3>Basic logout example</h3><p><code>
339 <pre class="prettyprint lang-config">
340 SetHandler form-logout-handler
342 AuthFormLogoutLocation http://example.com/loggedout.html
344 SessionCookieName session path=/
345 SessionCryptoPassphrase secret
350 <p>Note that logging a user out does not delete the session; it merely removes
351 the username and password from the session. If this results in an empty session,
352 the net effect will be the removal of that session, but this is not
353 guaranteed. If you want to guarantee the removal of a session, set the
354 <code class="directive"><a href="../mod/mod_session.html#sessionmaxage">SessionMaxAge</a></code> directive to a small
355 value, like 1 (setting the directive to zero would mean no session age limit).
358 <div class="example"><h3>Basic session expiry example</h3><p><code>
359 <pre class="prettyprint lang-config">
360 SetHandler form-logout-handler
361 AuthFormLogoutLocation http://example.com/loggedout.html
364 SessionCookieName session path=/
365 SessionCryptoPassphrase secret
370 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
371 <div class="section">
372 <h2><a name="urlencoding" id="urlencoding">Usernames and Passwords</a></h2>
373 <p>Note that form submission involves URLEncoding the form data:
374 in this case the username and password. You should therefore
375 pick usernames and passwords that avoid characters that are
376 URLencoded in form submission, or you may get unexpected results.</p>
378 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
379 <div class="directive-section"><h2><a name="AuthFormAuthoritative" id="AuthFormAuthoritative">AuthFormAuthoritative</a> <a name="authformauthoritative" id="authformauthoritative">Directive</a></h2>
380 <table class="directive">
381 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets whether authorization and authentication are passed to
382 lower level modules</td></tr>
383 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormAuthoritative On|Off</code></td></tr>
384 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthFormAuthoritative On</code></td></tr>
385 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
386 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
387 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
388 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
390 <p>Normally, each authorization module listed in <code class="directive"><a href="#authformprovider">AuthFormProvider</a></code> will attempt
391 to verify the user, and if the user is not found in any provider,
392 access will be denied. Setting the
393 <code class="directive">AuthFormAuthoritative</code> directive explicitly
394 to <code>Off</code> allows for both authentication and
395 authorization to be passed on to other non-provider-based modules
396 if there is <strong>no userID</strong> or <strong>rule</strong>
397 matching the supplied userID. This should only be necessary when
398 combining <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> with third-party modules
399 that are not configured with the <code class="directive"><a href="#authformprovider">AuthFormProvider</a></code>
400 directive. When using such modules, the order of processing
401 is determined in the modules' source code and is not configurable.</p>
404 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
405 <div class="directive-section"><h2><a name="AuthFormBody" id="AuthFormBody">AuthFormBody</a> <a name="authformbody" id="authformbody">Directive</a></h2>
406 <table class="directive">
407 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying the body of the request to attempt on successful login</td></tr>
408 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormBody <var>fieldname</var></code></td></tr>
409 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_body</code></td></tr>
410 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
411 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
412 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
413 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
415 <p>The <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code> directive specifies
416 the name of an HTML field which, if present, will contain the method of the request to
417 to submit should login be successful.</p>
419 <p>By populating the form with fields described by
420 <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code>,
421 <code class="directive"><a href="#authformmimetype">AuthFormMimetype</a></code> and
422 <code class="directive"><a href="#authformbody">AuthFormBody</a></code>, a website can retry
423 a request that may have been interrupted by the login screen, or by a session
427 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
428 <div class="directive-section"><h2><a name="AuthFormDisableNoStore" id="AuthFormDisableNoStore">AuthFormDisableNoStore</a> <a name="authformdisablenostore" id="authformdisablenostore">Directive</a></h2>
429 <table class="directive">
430 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Disable the CacheControl no-store header on the login page</td></tr>
431 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormDisableNoStore <var>On|Off</var></code></td></tr>
432 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthFormDisableNoStore Off</code></td></tr>
433 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
434 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
435 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
436 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
438 <p>The <code class="directive"><a href="#authformdisablenostore">AuthFormDisableNoStore</a></code> flag
439 disables the sending of a <code>Cache-Control no-store</code> header with the
440 error 401 page returned when the user is not yet logged in. The purpose of the header
441 is to make it difficult for an ecmascript application to attempt to resubmit the
442 login form, and reveal the username and password to the backend application. Disable
443 at your own risk.</p>
447 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
448 <div class="directive-section"><h2><a name="AuthFormFakeBasicAuth" id="AuthFormFakeBasicAuth">AuthFormFakeBasicAuth</a> <a name="authformfakebasicauth" id="authformfakebasicauth">Directive</a></h2>
449 <table class="directive">
450 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Fake a Basic Authentication header</td></tr>
451 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormFakeBasicAuth <var>On|Off</var></code></td></tr>
452 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthFormFakeBasicAuth Off</code></td></tr>
453 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
454 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
455 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
456 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
458 <p>The <code class="directive"><a href="#authformfakebasicauth">AuthFormFakeBasicAuth</a></code> flag
459 determines whether a <code>Basic Authentication</code> header will be added to
460 the request headers. This can be used to expose the username and password to
461 an underlying application, without the underlying application having to be aware
462 of how the login was achieved.</p>
466 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
467 <div class="directive-section"><h2><a name="AuthFormLocation" id="AuthFormLocation">AuthFormLocation</a> <a name="authformlocation" id="authformlocation">Directive</a></h2>
468 <table class="directive">
469 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying a URL to redirect to on successful login</td></tr>
470 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormLocation <var>fieldname</var></code></td></tr>
471 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_location</code></td></tr>
472 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
473 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
474 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
475 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
477 <p>The <code class="directive"><a href="#authformlocation">AuthFormLocation</a></code> directive specifies
478 the name of an HTML field which, if present, will contain a URL to redirect the browser to
479 should login be successful.</p>
482 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
483 <div class="directive-section"><h2><a name="AuthFormLoginRequiredLocation" id="AuthFormLoginRequiredLocation">AuthFormLoginRequiredLocation</a> <a name="authformloginrequiredlocation" id="authformloginrequiredlocation">Directive</a></h2>
484 <table class="directive">
485 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The URL of the page to be redirected to should login be required</td></tr>
486 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormLoginRequiredLocation <var>url</var></code></td></tr>
487 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
488 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
489 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
490 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
491 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
493 <p>The <code class="directive"><a href="#authformloginrequiredlocation">AuthFormLoginRequiredLocation</a></code> directive
494 specifies the URL to redirect to should the user not be authorised to view a page. By default,
495 if a user is not authorised to view a page, the HTTP response code <code>HTTP_UNAUTHORIZED</code>
496 will be returned with the page specified by the
497 <code class="directive"><a href="../mod/core.html#errordocument">ErrorDocument</a></code> directive. This directive overrides this
500 <p>Use this directive if you have a dedicated login page to redirect users to.</p>
504 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
505 <div class="directive-section"><h2><a name="AuthFormLoginSuccessLocation" id="AuthFormLoginSuccessLocation">AuthFormLoginSuccessLocation</a> <a name="authformloginsuccesslocation" id="authformloginsuccesslocation">Directive</a></h2>
506 <table class="directive">
507 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The URL of the page to be redirected to should login be successful</td></tr>
508 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormLoginSuccessLocation <var>url</var></code></td></tr>
509 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
510 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
511 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
512 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
513 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
515 <p>The <code class="directive"><a href="#authformloginsuccesslocation">AuthFormLoginSuccessLocation</a></code> directive
516 specifies the URL to redirect to should the user have logged in successfully. This directive
517 can be overridden if a form field has been defined containing another URL using the
518 <code class="directive"><a href="#authformlocation">AuthFormLocation</a></code> directive.</p>
520 <p>Use this directive if you have a dedicated login URL, and you have not embedded the
521 destination page in the login form.</p>
525 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
526 <div class="directive-section"><h2><a name="AuthFormLogoutLocation" id="AuthFormLogoutLocation">AuthFormLogoutLocation</a> <a name="authformlogoutlocation" id="authformlogoutlocation">Directive</a></h2>
527 <table class="directive">
528 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The URL to redirect to after a user has logged out</td></tr>
529 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormLogoutLocation <var>uri</var></code></td></tr>
530 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
531 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
532 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
533 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
534 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
536 <p>The <code class="directive"><a href="#authformlogoutlocation">AuthFormLogoutLocation</a></code> directive
537 specifies the URL of a page on the server to redirect to should the user attempt to log out.</p>
539 <p>When a URI is accessed that is served by the handler <code>form-logout-handler</code>,
540 the page specified by this directive will be shown to the end user. For example:</p>
542 <div class="example"><h3>Example</h3><p><code>
543 <pre class="prettyprint lang-config">
544 <Location /logout>
545 SetHandler form-logout-handler
546 AuthFormLogoutLocation http://example.com/loggedout.html
554 <p>An attempt to access the URI <var>/logout/</var> will result in the user being logged
555 out, and the page <var>/loggedout.html</var> will be displayed. Make sure that the page
556 <var>loggedout.html</var> is not password protected, otherwise the page will not be
561 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
562 <div class="directive-section"><h2><a name="AuthFormMethod" id="AuthFormMethod">AuthFormMethod</a> <a name="authformmethod" id="authformmethod">Directive</a></h2>
563 <table class="directive">
564 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying the method of the request to attempt on successful login</td></tr>
565 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormMethod <var>fieldname</var></code></td></tr>
566 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_method</code></td></tr>
567 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
568 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
569 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
570 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
572 <p>The <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code> directive specifies
573 the name of an HTML field which, if present, will contain the method of the request to
574 to submit should login be successful.</p>
576 <p>By populating the form with fields described by
577 <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code>,
578 <code class="directive"><a href="#authformmimetype">AuthFormMimetype</a></code> and
579 <code class="directive"><a href="#authformbody">AuthFormBody</a></code>, a website can retry
580 a request that may have been interrupted by the login screen, or by a session
584 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
585 <div class="directive-section"><h2><a name="AuthFormMimetype" id="AuthFormMimetype">AuthFormMimetype</a> <a name="authformmimetype" id="authformmimetype">Directive</a></h2>
586 <table class="directive">
587 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying the mimetype of the body of the request to attempt on successful login</td></tr>
588 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormMimetype <var>fieldname</var></code></td></tr>
589 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_mimetype</code></td></tr>
590 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
591 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
592 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
593 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
595 <p>The <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code> directive specifies
596 the name of an HTML field which, if present, will contain the
597 mimetype of the request to to submit should login be successful.</p>
599 <p>By populating the form with fields described by
600 <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code>,
601 <code class="directive"><a href="#authformmimetype">AuthFormMimetype</a></code> and
602 <code class="directive"><a href="#authformbody">AuthFormBody</a></code>, a website can retry
603 a request that may have been interrupted by the login screen, or by a session
607 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
608 <div class="directive-section"><h2><a name="AuthFormPassword" id="AuthFormPassword">AuthFormPassword</a> <a name="authformpassword" id="authformpassword">Directive</a></h2>
609 <table class="directive">
610 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying the login password</td></tr>
611 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormPassword <var>fieldname</var></code></td></tr>
612 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_password</code></td></tr>
613 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
614 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
615 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
616 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
618 <p>The <code class="directive"><a href="#authformpassword">AuthFormPassword</a></code> directive specifies
619 the name of an HTML field which, if present, will contain the password to be used to log
623 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
624 <div class="directive-section"><h2><a name="AuthFormProvider" id="AuthFormProvider">AuthFormProvider</a> <a name="authformprovider" id="authformprovider">Directive</a></h2>
625 <table class="directive">
626 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the authentication provider(s) for this location</td></tr>
627 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormProvider <var>provider-name</var>
628 [<var>provider-name</var>] ...</code></td></tr>
629 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthFormProvider file</code></td></tr>
630 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
631 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
632 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
633 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
635 <p>The <code class="directive">AuthFormProvider</code> directive sets
636 which provider is used to authenticate the users for this location.
637 The default <code>file</code> provider is implemented
638 by the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> module. Make sure
639 that the chosen provider module is present in the server.</p>
641 <div class="example"><h3>Example</h3><p><code>
642 <pre class="prettyprint lang-config">
643 <Location /secure>
645 AuthName "private area"
648 AuthDBMUserFile /www/etc/dbmpasswd
656 <p>Providers are implemented by <code class="module"><a href="../mod/mod_authn_dbm.html">mod_authn_dbm</a></code>,
657 <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>, <code class="module"><a href="../mod/mod_authn_dbd.html">mod_authn_dbd</a></code>,
658 <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> and <code class="module"><a href="../mod/mod_authn_socache.html">mod_authn_socache</a></code>.</p>
661 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
662 <div class="directive-section"><h2><a name="AuthFormSitePassphrase" id="AuthFormSitePassphrase">AuthFormSitePassphrase</a> <a name="authformsitepassphrase" id="authformsitepassphrase">Directive</a></h2>
663 <table class="directive">
664 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Bypass authentication checks for high traffic sites</td></tr>
665 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormSitePassphrase <var>secret</var></code></td></tr>
666 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
667 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
668 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
669 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
670 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
672 <p>The <code class="directive"><a href="#authformsitepassphrase">AuthFormSitePassphrase</a></code> directive
673 specifies a passphrase which, if present in the user session, causes Apache httpd to
674 bypass authentication checks for the given URL. It can be used on high traffic websites
675 to reduce the load induced on authentication infrastructure.</p>
677 <p>The passphrase can be inserted into a user session by adding this directive to the
678 configuration for the <var>form-login-handler</var>. The <var>form-login-handler</var>
679 itself will always run the authentication checks, regardless of whether a passphrase
680 is specified or not.</p>
682 <div class="warning"><h3>Warning</h3>
683 <p>If the session is exposed to the user through the use of
684 <code class="module"><a href="../mod/mod_session_cookie.html">mod_session_cookie</a></code>, and the session is not protected with
685 <code class="module"><a href="../mod/mod_session_crypto.html">mod_session_crypto</a></code>, the passphrase is open to potential exposure
686 through a dictionary attack. Regardless of how the session is configured,
687 ensure that this directive is not used within URL spaces where private user data
688 could be exposed, or sensitive transactions can be conducted. Use at own risk.</p>
693 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
694 <div class="directive-section"><h2><a name="AuthFormSize" id="AuthFormSize">AuthFormSize</a> <a name="authformsize" id="authformsize">Directive</a></h2>
695 <table class="directive">
696 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The largest size of the form in bytes that will be parsed for the login details</td></tr>
697 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormBody <var>size</var></code></td></tr>
698 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>8192</code></td></tr>
699 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
700 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
701 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
702 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
704 <p>The <code class="directive"><a href="#authformsize">AuthFormSize</a></code> directive specifies
705 the maximum size of the body of the request that will be parsed to find the login form.</p>
707 <p>If a login request arrives that exceeds this size, the whole request will be aborted
708 with the HTTP response code <code>HTTP_REQUEST_TOO_LARGE</code>.</p>
710 <p>If you have populated the form with fields described by
711 <code class="directive"><a href="#authformmethod">AuthFormMethod</a></code>,
712 <code class="directive"><a href="#authformmimetype">AuthFormMimetype</a></code> and
713 <code class="directive"><a href="#authformbody">AuthFormBody</a></code>, you probably want to set this
714 field to a similar size as the <code class="directive"><a href="../mod/mod_request.html#keptbodysize">KeptBodySize</a></code>
719 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
720 <div class="directive-section"><h2><a name="AuthFormUsername" id="AuthFormUsername">AuthFormUsername</a> <a name="authformusername" id="authformusername">Directive</a></h2>
721 <table class="directive">
722 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of a form field carrying the login username</td></tr>
723 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthFormUsername <var>fieldname</var></code></td></tr>
724 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>httpd_username</code></td></tr>
725 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
726 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
727 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_form</td></tr>
728 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.3.0 and later</td></tr>
730 <p>The <code class="directive"><a href="#authformusername">AuthFormUsername</a></code> directive specifies
731 the name of an HTML field which, if present, will contain the username to be used to log
736 <div class="bottomlang">
737 <p><span>Available Languages: </span><a href="../en/mod/mod_auth_form.html" title="English"> en </a></p>
738 </div><div id="footer">
739 <p class="apache">Copyright 2012 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
740 <p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript">
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