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1 XWiki supports several different authentication mechanisms for authenticating users:
2
3 {{toc/}}
4
5 {{info}}
6 XWiki currently allows only one method of authentication to be enabled at a time. This will probably be improved in the future.
7 {{/info}}
8
9 Also note that XWiki requires cookies to be enable in order to track your session and to keep you logged in between pages.
10
11 = Form Authentication =
12
13 Form authentication is the default way to get authenticated within a Wiki. It requires a user and a password.
14
15 = Basic Authentication =
16
17 XWiki supports [[basic access authentication>>http://en.wikipedia.org/wiki/Basic_access_authentication]], a method designed to allow a web browser or other client programs to provide credentials - in the form of a user name and password - when making a request. You can get authenticated against an XWiki server with the basic authentication protocol using the following URL scheme:
18
19 {{code}}
20 http://username:password@mywiki.xwiki.com/xwiki/bin/view/Main/WebHome?basicauth=1
21 {{/code}}
22
23 {{warning}}
24 Be careful that if you use the ##HTTP## protocol your password will be sent in clear over the network and is thus very unsafe. When using basic authentication you should make sure your wiki is configured to use ##HTTPS##.
25 {{/warning}}
26
27 = Container Authentication =
28
29 Delegates authentication to the Servlet Container. If it fails it falls back to the standard XWiki authentication.
30
31 To configure XWiki to use it, specify:
32
33 {{code language="properties"}}
34 xwiki.authentication.authclass=com.xpn.xwiki.user.impl.xwiki.AppServerTrustedAuthServiceImpl
35 {{/code}}
36
37 For users to be actually created and not just set as context user you must set in ##xwiki.cfg## configuration file (if the property does not already exist, create it):
38
39 {{code language="properties"}}
40 xwiki.authentication.createuser=empty
41 {{/code}}
42
43 = Social Login =
44
45 See the [[Social Login Application>>extensions:Extension.Social Login Application]].
46
47 = LDAP Authentication =
48
49 If you are going to use the [[LDAP Admin Extension>>extensions:Extension.LDAP Application]], which makes it easier to configure LDAP, then you only need to uncomment xwiki.authentication.authclass property and //nothing// else. Unlike editing xwiki.cfg, which requires you to redeploy the XWiki webapp, LDAP Extension allows you to make changes without restarting.
50
51 == Generic LDAP configuration ==
52
53 In order to enable the LDAP support you have to change the authentication method in //WEB-INF/xwiki.cfg// as follows:
54
55 {{code language="properties"}}
56 #-# LDAP authentication service
57 # xwiki.authentication.authclass=com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl
58
59 #-# Turn LDAP authentication on - otherwise only XWiki authentication
60 #-# - 0: disable
61 #-# - 1: enable
62 #-# The default is 1
63 # xwiki.authentication.ldap=1
64 {{/code}}
65
66 You can setup the LDAP configuration in the **xwiki.cfg** file by filling the following properties:
67
68 {{code language="properties"}}
69 #-# LDAP Server (Active Directory, eDirectory, OpenLDAP, etc.)
70 xwiki.authentication.ldap.server=127.0.0.1
71 xwiki.authentication.ldap.port=389
72
73 #-# LDAP login, empty = anonymous access, otherwise specify full dn
74 #-# {0} is replaced with the user name, {1} with the password
75 xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP
76 xwiki.authentication.ldap.bind_pass={1}
77
78 #-# The Base DN used in LDAP searches
79 xwiki.authentication.ldap.base_DN=
80
81 #-# LDAP query to search the user in the LDAP database (in case a static admin user is provided in
82 #-# xwiki.authentication.ldap.bind_DN)
83 #-# {0} is replaced with the user uid field name and {1} with the user name
84 #-# The default is ({0}={1})
85 # xwiki.authentication.ldap.user_search_fmt=({0}={1})
86
87 #-# Only members of the following group can authenticate.
88 #-# The following kind of groups are supported:
89 #-# * LDAP static groups (users/subgroups are listed statically in the group object)
90 #-# * [Since 3.3M1] LDAP organization units (users/subgroups are sub object of the provided organization unit)
91 #-# * [Since 3.3M1] LDAP filter (users/groups are object found in a search with the provided filter)
92 # xwiki.authentication.ldap.user_group=cn=developers,ou=groups,o=MegaNova,c=US
93
94 #-# [Since 1.5RC1, XWikiLDAPAuthServiceImpl]
95 #-# Only users not member of the following group can authenticate.
96 #-# The following kind of groups are supported:
97 #-# * LDAP static groups (users/subgroups are listed statically in the group object)
98 #-# * [Since 3.3M1] LDAP organization units (users/subgroups are sub object of the provided organization unit)
99 #-# * [Since 3.3M1] LDAP filter (users/groups are object found in a search with the provided filter)
100 # xwiki.authentication.ldap.exclude_group=cn=admin,ou=groups,o=MegaNova,c=US
101
102 #-# Specifies the LDAP attribute containing the identifier to be used as the XWiki name
103 #-# The default is cn
104 # xwiki.authentication.ldap.UID_attr=cn
105
106 #-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
107 #-# The potential LDAP groups classes. Separated by commas.
108 # xwiki.authentication.ldap.group_classes=group,groupOfNames,groupOfUniqueNames,dynamicGroup,dynamicGroupAux,groupWiseDistributionList,posixGroup,apple-group
109
110 #-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
111 #-# The potential names of the LDAP groups fields containings the members. Separated by commas.
112 # xwiki.authentication.ldap.group_memberfields=member,uniqueMember,memberUid
113
114 #-# retrieve the following fields from LDAP and store them in the XWiki user object (xwiki-attribute=ldap-attribute)
115 xwiki.authentication.ldap.fields_mapping=last_name=sn,first_name=givenName,email=mail
116
117 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
118 #-# On every login update the mapped attributes from LDAP to XWiki otherwise this happens only once when the XWiki
119 #-# account is created.
120 #-# - 0: only when creating user
121 #-# - 1: at each authentication
122 #-# The default is 0
123 xwiki.authentication.ldap.update_user=1
124
125 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
126 #-# Maps XWiki groups to LDAP groups, separator is "|".
127 #-# The following kind of groups are supported:
128 #-# * LDAP static groups (users/subgroups are listed statically in the group object)
129 #-# * [Since 3.3M1] LDAP organization units (users/subgroups are sub object of the provided organization unit)
130 #-# * [Since 3.3M1] LDAP filter (users/groups are object found in a search with the provided filter),
131 #-# | character in the filter need to be escaped with backslash (\).
132 #-#
133 #-# Here is an example:
134 # xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=cn=AdminRole,ou=groups,o=domain,c=com|\
135 # XWiki.LDAPUsers=ou=groups,o=domain,c=com|\
136 # XWiki.Organisation=(cn=testers)
137
138 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
139 #-# Time in s after which the list of members in a group is refreshed from LDAP
140 #-# The default is 21600 (6 hours)
141 # xwiki.authentication.ldap.groupcache_expiration=21600
142
143 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
144 #-# - create : synchronize group membership only when the user is first created
145 #-# - always: synchronize on every login
146 #-# The default is always
147 # xwiki.authentication.ldap.mode_group_sync=always
148
149 #-# [Since 7.2M3, XWikiLDAPAuthServiceImpl]
150 #-# Indicate groups members should be resolved in case they are subgroups.
151 #-# Doing so can be very expensive so it should be disabled if you know there is no subgroups
152 #-# (or if you don't care about them).
153 #-# If the group is actually a filter it will always be resolved since it does not make sense left alone.
154 #-# - 0: disable
155 #-# - 1: enable
156 #-# The default is 1
157 # xwiki.authentication.ldap.group_sync_resolve_subgroups=0
158
159 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
160 #-# If ldap authentication fails for any reason, try XWiki DB authentication with the same credentials
161 #-# - 0: disable
162 #-# - 1: enable
163 #-# The default is 0
164 xwiki.authentication.ldap.trylocal=1
165
166 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
167 #-# SSL connection to LDAP server
168 #-# - 0: normal
169 #-# - 1: SSL
170 #-# The default is 0
171 # xwiki.authentication.ldap.ssl=0
172
173 #-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
174 #-# The keystore file to use in SSL connection
175 # xwiki.authentication.ldap.ssl.keystore=
176
177 #-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
178 #-# The java secure provider used in SSL connection
179 #-# The default is com.sun.net.ssl.internal.ssl.Provider
180 # xwiki.authentication.ldap.ssl.secure_provider=com.sun.net.ssl.internal.ssl.Provider
181
182 #-# Bypass standard LDAP bind validation by doing a direct password comparison.
183 #-# If you don't know what you do, don't use that. It's covering very rare and bad use cases.
184 #-# - 0: disable
185 #-# - 1: enable
186 #-# The default is 0
187 # xwiki.authentication.ldap.validate_password=0
188
189 #-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
190 #-# Specifies the LDAP attribute containing the password to be used "when xwiki.authentication.ldap.validate_password"
191 #-# is set to 1
192 # xwiki.authentication.ldap.password_field=userPassword
193
194 #-# [Since 4.3M1, XWikiLDAPAuthServiceImpl]
195 #-# The maximum number of milliseconds the client waits for any operation under these constraints to complete.
196 #-# The default is 1000
197 # xwiki.authentication.ldap.timeout=1000
198
199 #-# [Since 6.3M1, XWikiLDAPAuthServiceImpl]
200 #-# The maximum number of search results to be returned from a search operation.
201 #-# The default is 1000
202 # xwiki.authentication.ldap.maxresults=1000
203 {{/code}}
204
205 {{info}}
206 You can also setup the LDAP configuration in the XWiki.XWikiPreferences page by going to the object editor. Simply replace **xwiki.authentication.ldap.** with **ldap_**. For example ##xwiki.authentication.ldap.base_DN## becomes ##ldap_base_DN##.
207 {{/info}}
208
209 For testing purposes, you may wish to omit the "ldap.fields_mapping" field, to test the authentication first, and then add it later to get the mappings right.
210
211 Here are some LDAP clients for checking your configuration:
212
213 Java based and Open Source:
214
215 * [[Apache Directory Studio>>http://directory.apache.org/studio/]]
216 * [[JXplorer>>http://jxplorer.org/]]
217
218 Windows only:
219
220 * [[Softerra LDAP Browser>>http://www.ldapbrowser.com/info_softerra-ldap-browser.htm]]
221
222 == Detailed use cases ==
223
224 See the [[LDAP configuration uses cases>>LDAPAuthenticationUseCases]] for some detailed use cases.
225
226 == Enable LDAP debug log ==
227
228 See [[AdminGuide.Logging]].
229
230 The specific packages to track for LDAP are ##com.xpn.xwiki.plugin.ldap## and ##com.xpn.xwiki.user.impl.LDAP##.
231
232 Starting with XWiki 4.2 we added a new [[Logging UI>>extensions:Extension.Logging Application]] from the Administration section, which allows logging to be enabled at runtime, directly from the UI, without the need to restart the wiki.
233
234 In XWiki 3.4 you need to add the following in ##WEB-INF/classes/logback.xml##:
235
236 {{code}}
237 <!-- LDAP debugging -->
238 <logger name="com.xpn.xwiki.plugin.ldap" level="trace"/>
239 <logger name="com.xpn.xwiki.user.impl.LDAP" level="trace"/>
240 {{/code}}
241
242 Before 3.1, add the following to the log4j configuration file:
243
244 {{code}}
245 log4j.logger.com.xpn.xwiki.plugin.ldap=trace
246 log4j.logger.com.xpn.xwiki.user.impl.LDAP=trace
247 {{/code}}
248
249 = Custom Authentication =
250
251 This allows plugging to any existing authentication mechanism such as SiteMinder, etc. To configure a custom authentication do the following:
252
253 1. Implement the {{scm path="xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/user/api/XWikiAuthService.java"}}XWikiAuthService{{/scm}} interface.
254 1. Edit the //WEB-INF/xwiki.cfg// file and add a //xwiki.authentication.authclass// property pointing to your class. For example:
255
256 {{code language="properties"}}
257 xwiki.authentication.authclass = com.acme.MyCustomAuthenticationService
258 {{/code}}
259
260 You can find various authenticators examples in [[sandbox>>https://github.com/xwiki-contrib/sandbox/tree/master/authenticators]] or [[extensions>>http://extensions.xwiki.org/xwiki/bin/view/Main/WebHome#|t=extensions&p=1&l=30&s=doc.creationDate&d=desc&name=authenticator]].
261
262 Here's a [[tutorial on implementing a custom authentication class for authenticating against Oracle's SSO>>http://bodez.wordpress.com/2008/10/15/xwiki-user-authentication-with-oracle-sso/]].
263
264 Note, that you can also implement own right management service by implementing the {{scm path="xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/user/api/XWikiRightService.java"}}XWikiRightService{{/scm}} interface:
265
266 {{code language="properties"}}
267 xwiki.authentication.rightsclass = com.acme.MyCustomRightsService
268 {{/code}}
269
270 and Group Service by implementing {{scm path="xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/user/api/XWikiGroupService.java"}}XWikiGroupService{{/scm}}:
271
272 {{code language="properties"}}
273 xwiki.authentication.groupclass = com.acme.MyCustomGroupService
274 {{/code}}
275
276 == Custom Authentication using a Groovy script in a wiki page ==
277
278 Start by specifying you want to use the Groovy Authenticator:
279
280 {{code language="properties"}}
281 xwiki.authentication.authclass = com.xpn.xwiki.user.impl.xwiki.GroovyAuthServiceImpl
282 {{/code}}
283
284 Then add another configuration parameter to specify in which wiki page the authenticator is:
285
286 {{code language="properties"}}
287 xwiki.authentication.groovy.pagename = MySpace.MyPage
288 {{/code}}
289
290 Then put some Groovy code in a wiki page that returns a XWikiAuthService object.
291
292 = Authentication parameters =
293
294 You can set each of these parameters by setting:
295
296 {{code}}
297 xwiki.authentication.~~param_name~~=~~param_value~~
298 {{/code}}
299
300 |=Name|=Optional|=Allowed values|=Default value|=Description
301 |encryptionKey|No(1)|?|n/a|Set the Encryption Key used to create a secret key, the secret key is passed to the Cipher object to be used during encryption and decryption of cookie values.
302 |validationKey|No(2)|?|n/a|Set the Validation Key used to generate hash value; the hash value is stored with the cookie and used to verify that the cookie has not been tampered with.
303 |cookiedomains|Yes|String|Server host name|Which host(s) should your cookies be sent to; use only if you want to share cookies across domains, otherwise should be commented out
304 |cookielife|Yes|Number|14|Number of days cookies take to expire
305 |cookiepath|Yes|String|/|The webapp path that XWiki cookies should be sent to; if you have anything else running on your web server, this should be set to ///xwiki//
306 |default_page|Yes|String|/bin/view/ Main/WebHome|Page to redirect to if xredirect parameter is not set
307 |encryptionalgorithm|Yes|?|?|Set the Encryption Algorithm used to encrypt and decrypt cookies
308 |encryptionmode|Yes|?|?|Set the Encryption Mode used to encrypt and decrypt cookies
309 |encryptionpadding|Yes|?|?|Set the Encryption Padding used to encrypt and decrypt cookies
310 |errorpage|Yes|String|/bin/loginerror/ XWiki/XWikiLogin|Page to redirect to if there is an error logging in
311 |loginpage|Yes|String|/bin/login/ XWiki/XWikiLogin|Page to redirect to when not logged in
312 |loginsubmitpage|Yes|String|/loginsubmit/ XWiki/XWikiLogin|The URL where the username and password are posted to when logging in.
313 |logoutpage|Yes|String|/bin/logout/ XWiki/XWikiLogout|Page to redirect to after logged out
314 |realmname|Yes|String|XWiki|Sets the realm name
315 |protection|Yes|all, validation, encryption, none|all|Protection level for the "remember me" cookie functionality
316 |unauthorized_code|Yes|Number|401|The HTTP status code to return when the login has failed.
317 |useip|Yes|true / false|true|Specify to use the IP address when encrypting the cookie data; if IP address changes will need to re-login.
318
319 1. Only required if protection = encryption or all (default)
320 1. Only required if protection = validation or all (default)
321
322 = Kerberos SSO Authentication =
323
324 {{warning}}
325 This implementation of SSO is currently under review see: http://jira.xwiki.org/jira/browse/XWIKI-2496 . The class which is described in this segment of documentation, AppServerTrustedKerberosAuthServiceImpl, is not part of the default XWiki distribution!
326 {{/warning}}
327
328 The following is an example of **mod_auth_kerb** for Apache being used to easily implement XWiki authentication of users via HTTP Negotiate on a linux server. This example assumes you already have a working Apache2 HTTPD and Apache Tomcat setup with mod_jk.
329
330 First of all you need to create a principal and keytab for the webserver:
331
332 {{code}}
333 # kadmin
334 kadmin> addprinc -randkey HTTP/wiki.example.com
335 kadmin> ktadd -k /etc/apache2/ssl/wiki.keytab HTTP/wiki.example.com
336 kadmin> quit
337 {{/code}}
338
339 Make sure the keytab has the right permissions and ownership:
340
341 {{code}}
342 chown www-data:www-data /etc/apache2/ssl/wiki.keytab
343 chmod 400 /etc/apache2/ssl/wiki.keytab
344 {{/code}}
345
346 Install **mod_auth_kerb** in your linux installation. On Debian or Ubuntu this would be achieved by running:
347
348 {{code}}
349 aptitude install libapache2-mod-auth-kerb
350 {{/code}}
351
352 Of course the installation procedure varies per Linux distribution.
353
354 If your xwiki installation is mounted in Apache HTTPD under /xwiki, add the following to the virtual host configuration:
355
356 {{code}}
357 <Location /xwiki/>
358 AuthType Kerberos
359 AuthName "Kerberos Login"
360 KrbAuthRealms EXAMPLE.COM
361 Krb5Keytab "/etc/apache2/ssl/wiki.keytab"
362 KrbMethodK5Passwd off
363 KrbMethodNegotiate on
364 KrbSaveCredentials on
365 require valid-user
366 </Location>
367 {{/code}}
368
369 Make sure Apache Tomcat uses the authentication performed by Apache HTTPD with the "tomcatAuthentication" property in the connector description (which is in the **server.xml** file of Apache Tomcat):
370
371 {{code}}
372 <Connector port="8009" address="127.0.0.1" enableLookups="false" tomcatAuthentication="false" redirectPort="8443" protocol="AJP/1.3" />
373 {{/code}}
374
375 Place the **authkerb.jar** jar in the ##WEB-INF/lib## directory of XWiki in Apache Tomcat.
376
377 Have Xwiki use the authentication module by changing the "xwiki.authentication.authclass" property in the ##WEB-INF/lib/xwiki.cfg## file.
378
379 {{code}}
380 xwiki.authentication.authclass=com.xpn.xwiki.user.impl.xwiki.AppServerTrustedKerberosAuthServiceImpl
381 {{/code}}
382
383 If you use Firefox, do not forget to whitelist the xwiki URL for HTTP Negotiate in about:config with the "network.negotiate-auth.trusted-uris" property. Possible values for this property include: //https:~/~/// for all secured connections or **example.com** for all example.com subdomains.
384
385 When I used JBoss SPNEGO (Kerberos in combination with LDAP) I changed the code of the **XWikiLDAPAuthServiceImpl** to be able to detect the sso user. The authenication already happend by using the SPNEGO module (JAAS). After that I'm using the ldap synchronisation feature to make sure that the user is up to date. The combination leads to an automatic login in XWiki and the user rights are controlled in the Active Directory server. I hope you can adopt this code or that you can use it for your own projects.
386
387 The configuration of ldap:
388
389 {{code}}
390 xwiki.authentication.authclass=com.wiki.sso.SSOLdapAuthenicationImpl
391 xwiki.authentication.ldap=1
392 xwiki.authentication.ldap.server=<ad-server>
393 xwiki.authentication.ldap.port=389
394 xwiki.authentication.ldap.base_DN=<OU=Users,...............>
395 #use a fixed user to attach to the ldap database,
396 #the password is not provided with the SSOLdapAuthenicationImpl
397 xwiki.authentication.ldap.bind_DN=<domain>\\<user>
398 xwiki.authentication.ldap.bind_pass=<password>
399 #Microsoft AD configuration
400 xwiki.authentication.ldap.UID_attr=sAMAccountName
401 xwiki.authentication.ldap.fields_mapping=name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn
402 xwiki.authentication.ldap.group_memberfields=member,uniqueMember
403 #LDAP group mapping
404 xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=CN=WIKI_Admin,............|\
405 XWiki.XWikiAllGroup=CN=WIKI_User,...........
406 {{/code}}
407
408 The java code:
409
410 {{code}}
411 package com.wiki.sso;
412
413
414 import org.apache.commons.logging.Log;
415 import org.apache.commons.logging.LogFactory;
416
417 import com.xpn.xwiki.XWikiContext;
418 import com.xpn.xwiki.XWikiException;
419 import com.xpn.xwiki.user.api.XWikiUser;
420 import com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl;
421
422 import java.security.Principal;
423
424 public class SSOLdapAuthenicationImpl extends XWikiLDAPAuthServiceImpl {
425 /**
426 * Logging tool.
427 */
428 private static final Log LOG = LogFactory.getLog(SSOLdapAuthenicationImpl.class);
429
430
431 public XWikiUser checkAuth(XWikiContext context) throws XWikiException {
432 String user = getRemoteUser(context);
433 if ((user != null) || !user.equals("")) {
434 if (LOG.isInfoEnabled())
435 LOG.info("Launching create user for " + user);
436 if ( authenticate(user, context) != null ) {
437 if (LOG.isInfoEnabled())
438 LOG.info("Create user done for " + user);
439 user = "XWiki." + user;
440 context.setUser(user);
441 System.out.println("User is set to:" + user);
442 return new XWikiUser(user);
443 } else {
444 LOG.error( "User " + user + " can't be authenticated against ldap" );
445 }
446 }
447 return super.checkAuth(context);
448 }
449
450 /**
451 * We cannot authenticate locally since we need to trust the app server for
452 * authentication
453 *
454 * @param username
455 * @param password
456 * @param context
457 * @return
458 * @throws XWikiException
459 */
460 public XWikiUser checkAuth(String username, String password,
461 String rememberme, XWikiContext context) throws XWikiException {
462 String user = getRemoteUser(context);
463 if ((user == null) || user.equals("")) {
464 return super.checkAuth(username, password, rememberme, context);
465 }
466 return checkAuth(context);
467 }
468
469 private String getRemoteUser(XWikiContext context) {
470 String userName = context.getRequest().getHttpServletRequest()
471 .getRemoteUser();
472 if (userName != null) {
473 // only take the front of the username@domain
474 String[] elements = userName.split("@", 2);
475 userName = elements[0];
476 }
477 return userName;
478 }
479
480 public Principal authenticate(String login, XWikiContext context) throws XWikiException
481 {
482 if (LOG.isTraceEnabled()) {
483 LOG.trace("Starting LDAP authentication");
484 }
485
486 /*
487 * TODO: Put the next 4 following "if" in common with XWikiAuthService to ensure coherence This method was
488 * returning null on failure so I preserved that behaviour, while adding the exact error messages to the context
489 * given as argument. However, the right way to do this would probably be to throw XWikiException-s.
490 */
491
492 if (login == null) {
493 // If we can't find the username field then we are probably on the login screen
494
495 if (LOG.isDebugEnabled()) {
496 LOG.debug("The provided user is null."
497 + " We don't try to authenticate, it probably means the user is in non logged mode.");
498 }
499
500 return null;
501 }
502
503 // Check for empty usernames
504 if (login.equals("")) {
505 context.put("message", "nousername");
506
507 if (LOG.isDebugEnabled()) {
508 LOG.debug("LDAP authentication failed: login empty");
509 }
510
511 return null;
512 }
513
514 // If we have the context then we are using direct mode
515 // then we should specify the database
516 // This is needed for virtual mode to work
517 Principal principal = null;
518
519 // Try authentication against ldap
520 principal = ldapAuthenticate(login, "", context);
521
522 if (LOG.isDebugEnabled()) {
523 if (principal != null) {
524 LOG.debug("LDAP authentication succeed with principal [" + principal.getName() + "]");
525 } else {
526 LOG.debug("LDAP authentication failed for user [" + login + "]");
527 }
528 }
529
530 return principal;
531 }
532 }
533 {{/code}}

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