Wiki source code of User Authentication

Version 52.1 by Thomas Mortagne on 2012/05/15

version	line-number	content
1.18	1	XWiki supports several different authentication mechanisms for authenticating users:
1.1	2
34.2	3	{{toc/}}
34.1	4
1.1	5	The form authentication is the default mechanism.
	6
34.1	7	{{info}}
	8	Note that currently XWiki allows only one method of authentication to be enabled at a time. This will probably be improved in the future.
	9	{{/info}}
1.1	10
34.2	11	= Form Authentication =
1.1	12
38.2	13	Form authentication is the default way to get authenticated within a Wiki. It requires a user and a password.
1.1	14
46.1	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 program, 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
34.2	27	= LDAP Authentication =
1.1	28
34.1	29	{{warning}}
	30	New LDAP implementation since XWiki Platform 1.3M2, see [[previous LDAP authentication service documentation>>AuthenticationLdapOld]]
	31	{{/warning}}
17.3	32
34.2	33	== Generic LDAP configuration ==
1.1	34
34.1	35	In order to enable the LDAP support you have to change the authentication method in //WEB-INF/xwiki.cfg// as follows:
	36
	37	{{code}}
50.1	38	#-# LDAP authentication service
	39	# xwiki.authentication.authclass=com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl
7.1	40
50.1	41	#-# Turn LDAP authentication on - otherwise only XWiki authentication
	42	#-# - 0: disable
	43	#-# - 1: enable
	44	#-# The default is 1
	45	# xwiki.authentication.ldap=1
34.1	46	{{/code}}
18.1	47
34.1	48	You can setup the LDAP configuration in the //xwiki.cfg// file by filling the following properties:
1.2	49
34.1	50	{{code language="none"}}
36.1	51	#-# LDAP Server (Active Directory, eDirectory, OpenLDAP, etc.)
	52	xwiki.authentication.ldap.server=127.0.0.1
1.1	53	xwiki.authentication.ldap.port=389
6.1	54
36.1	55	#-# LDAP login, empty = anonymous access, otherwise specify full dn
50.1	56	#-# {0} is replaced with the user name, {1} with the password
1.1	57	xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP
	58	xwiki.authentication.ldap.bind_pass={1}
6.1	59
50.1	60	#-# The Base DN used in LDAP searches
	61	xwiki.authentication.ldap.base_DN=
12.1	62
50.1	63	#-# LDAP query to search the user in the LDAP database (in case a static admin user is provided in
	64	#-# xwiki.authentication.ldap.bind_DN)
	65	#-# {0} is replaced with the user uid field name and {1} with the user name
	66	#-# The default is ({0}={1})
	67	# xwiki.authentication.ldap.ldap_user_search_fmt=({0}={1})
	68
	69	#-# Only members of the following group will be verified in the LDAP
36.1	70	#-# otherwise only users that are found after searching starting from the base_DN
	71	# xwiki.authentication.ldap.user_group=cn=developers,ou=groups,o=MegaNova,c=US
6.1	72
50.1	73	#-# [Since 1.5RC1, XWikiLDAPAuthServiceImpl]
	74	#-# Only users not member of the following group can autheticate
36.1	75	# xwiki.authentication.ldap.exclude_group=cn=admin,ou=groups,o=MegaNova,c=US
22.1	76
50.1	77	#-# Specifies the LDAP attribute containing the identifier to be used as the XWiki name
	78	#-# The default is cn
36.1	79	# xwiki.authentication.ldap.UID_attr=cn
6.1	80
50.1	81	#-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
36.1	82	#-# The potential LDAP groups classes. Separated by commas.
	83	# xwiki.authentication.ldap.group_classes=group,groupOfNames,groupOfUniqueNames,dynamicGroup,dynamicGroupAux,groupWiseDistributionList
	84
50.1	85	#-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
36.1	86	#-# The potential names of the LDAP groups fields containings the members. Separated by commas.
	87	# xwiki.authentication.ldap.group_memberfields=member,uniqueMember
	88
	89	#-# retrieve the following fields from LDAP and store them in the XWiki user object (xwiki-attribute=ldap-attribute)
	90	xwiki.authentication.ldap.fields_mapping=last_name=sn,first_name=givenName,email=mail
	91
50.1	92	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
	93	#-# On every login update the mapped attributes from LDAP to XWiki otherwise this happens only once when the XWiki
	94	#-# account is created.
	95	#-# - 0: only when creating user
	96	#-# - 1: at each authentication
	97	#-# The default is 1
	98	# xwiki.authentication.ldap.update_user=1
6.1	99
50.1	100	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
	101	#-# Maps XWiki groups to LDAP groups, separator is "\|". The following kind of groups are supported:
	102	#-# * LDAP static groups (users/subgroups are listed statically in the group object)
	103	#-# * [Since 3.3M1] LDAP organization units (users/subgroups are sub object of the provided organization unit)
	104	#-# * [Since 3.3M1] LDAP filter (users/groups are object found in a search with the provided filter),
	105	#-# \| character in the filter need to be escaped with backslash (\).
	106	#-#
	107	#-# Here is an example:
	108	# xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=cn=AdminRole,ou=groups,o=domain,c=com\|\
	109	# XWiki.LDAPUsers=ou=groups,o=domain,c=com\|\
	110	# XWiki.Organisation=(cn=testers)
6.1	111
50.1	112	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
	113	#-# Time in s after which the list of members in a group is refreshed from LDAP
	114	#-# The default is 21600 (6 hours)
	115	# xwiki.authentication.ldap.groupcache_expiration=21600
6.1	116
50.1	117	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
36.1	118	#-# - create : synchronize group membership only when the user is first created
	119	#-# - always: synchronize on every login
50.1	120	#-# The default is always
36.1	121	# xwiki.authentication.ldap.mode_group_sync=always
6.1	122
50.1	123	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
36.1	124	#-# if ldap authentication fails for any reason, try XWiki DB authentication with the same credentials
50.1	125	#-# The default is 1
6.1	126	xwiki.authentication.ldap.trylocal=1
8.1	127
50.1	128	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
36.1	129	#-# SSL connection to LDAP server
50.1	130	#-# - 0: normal
	131	#-# - 1: SSL
	132	#-# The default is 0
36.1	133	# xwiki.authentication.ldap.ssl=0
8.1	134
50.1	135	#-# [Since 1.3M2, XWikiLDAPAuthServiceImpl]
36.1	136	#-# The keystore file to use in SSL connection
	137	# xwiki.authentication.ldap.ssl.keystore=
	138
50.1	139	#-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
36.1	140	#-# The java secure provider used in SSL connection
50.1	141	#-# The default is com.sun.net.ssl.internal.ssl.Provider
36.1	142	# xwiki.authentication.ldap.ssl.secure_provider=com.sun.net.ssl.internal.ssl.Provider
50.1	143
	144	#-# Bypass standard LDAP bind validation by doing a direct password comparison.
	145	#-# If you don't know what you do, don't use that. It's covering very rare and bad use cases.
	146	#-# - 0: disable
	147	#-# - 1: enable
	148	#-# The default is 0
	149	# xwiki.authentication.ldap.validate_password=0
	150
	151	#-# [Since 1.5M1, XWikiLDAPAuthServiceImpl]
	152	#-# Specifies the LDAP attribute containing the password to be used "when xwiki.authentication.ldap.validate_password"
	153	#-# is set to 1
	154	# xwiki.authentication.ldap.password_field=userPassword
34.1	155	{{/code}}
3.1	156
34.1	157	{{info}}
48.1	158	You can also setup the LDAP configuration in XWiki.XWikiPreferences page by going to the object editor. Simply replace "xwiki.authentication.ldap." by "ldap_". For example ##xwiki.authentication.ldap.base_DN## becomes ##ldap_base_DN##.
34.1	159	{{/info}}
9.1	160
1.19	161	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.
	162
31.1	163	Here are some LDAP client for checking your configuration:
1.19	164
52.1	165	Java based and Open Source:
34.1	166	* [[Apache Directory Studio>>http://directory.apache.org/studio/]]
37.1	167	* [[LDAPExplorerTool>>http://ldaptool.sourceforge.net/]]
51.1	168	* [[JXplorer>>http://jxplorer.org]]
1.19	169
52.1	170	Windows only:
	171	* [[Softerra LDAP Browser>>http://www.ldapbrowser.com/download.htm]]
	172
34.2	173	== Detailed use cases ==
12.1	174
34.1	175	See [[LDAP configuration uses cases>>LDAPAuthenticationUseCases]] for some detailed use cases.
25.1	176
34.2	177	== Enable LDAP debug log ==
34.1	178
42.1	179	See [[AdminGuide.Logging]].
34.1	180
45.1	181	The specific packages to track for LDAP are ##com.xpn.xwiki.plugin.ldap## and ##com.xpn.xwiki.user.impl.LDAP##.
27.1	182
49.1	183	In XWiki 3.4 you need to add the following in ##WEB-INF/classes/logback.xml##:
	184
	185	{{code}}
	186	<!-- LDAP debugging -->
	187	<logger name="com.xpn.xwiki.plugin.ldap" level="trace"/>
	188	<logger name="com.xpn.xwiki.user.impl.LDAP" level="trace"/>
	189	{{/code}}
	190
42.1	191	Before 3.1, add the following to the log4j configuration file:
	192
44.1	193	{{code}}
	194	log4j.logger.com.xpn.xwiki.plugin.ldap=trace
	195	log4j.logger.com.xpn.xwiki.user.impl.LDAP=trace
	196	{{/code}}
	197
34.2	198	= eXo Authentication =
30.1	199
34.1	200	The eXo authentication is used automatically by adding/editing the //xwiki.exo=1// property in //WEB-INF/xwiki.cfg//.
1.1	201
34.2	202	= Custom Authentication =
1.1	203
	204	This allows plugging to any existing authentication mechanism such as SiteMinder, etc. To configure a custom authentication do the following:
	205
47.2	206	1. Implement the {{scm path="xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/user/api/XWikiAuthService.java"}}XWikiAuthService{{/scm}} interface.
34.1	207	1. Edit the //WEB-INF/xwiki.cfg// file and add a //xwiki.authentication.authclass// property pointing to your class. For example:
	208
	209	{{code}}
1.1	210	xwiki.authentication.authclass = com.acme.MyCustomAuthenticationService
34.1	211	{{/code}}
1.1	212
34.1	213	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/]].
27.2	214
47.2	215	Note, that you also can implement own right management service by implementing {{scm path="xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/user/api/XWikiRightService.java"}}XWikiRightService{{/scm}} interface:
34.1	216
	217	{{code}}
5.1	218	xwiki.authentication.rightsclass = com.acme.MyCustomRightsService
34.1	219	{{/code}}
4.1	220
47.2	221	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}}:
4.1	222
34.1	223	{{code}}
27.3	224	xwiki.authentication.groupclass = com.acme.MyCustomGroupService
34.1	225	{{/code}}
4.1	226
34.2	227	== Custom Authentication using a Groovy script in a wiki page ==
28.1	228
	229	Start by specifying you want to use the Groovy Authenticator:
	230
34.1	231	{{code}}
28.1	232	xwiki.authentication.authclass = com.xpn.xwiki.user.impl.xwiki.GroovyAuthServiceImpl
34.1	233	{{/code}}
28.1	234
	235	Then add another configuration parameter to specify in which wiki page the authenticator is:
	236
34.1	237	{{code}}
28.1	238	xwiki.authentication.groovy.pagename = MySpace.MyPage
34.1	239	{{/code}}
28.1	240
	241	Then in a wiki page put some Groovy code that returns a XWikiAuthService object.
	242
37.1	243	= Authentication parameters =
1.14	244
	245	You can set each of these parameters by setting:
	246
34.1	247	{{code}}
1.14	248	xwiki.authentication.~~param_name~~=~~param_value~~
34.1	249	{{/code}}
1.14	250
34.1	251	\|=Name\|=Optional\|=Allowed values\|=Default value\|=Description
	252	\|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.
	253	\|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.
	254	\|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
	255	\|cookielife\|Yes\|Number\|14\|Number of days cookies take to expire
	256	\|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//
	257	\|default_page\|Yes\|String\|/bin/view/ Main/WebHome\|Page to redirect to if xredirect parameter is not set
	258	\|encryptionalgorithm\|Yes\|?\|?\|Set the Encryption Algorithm used to encrypt and decrypt cookies
	259	\|encryptionmode\|Yes\|?\|?\|Set the Encryption Mode used to encrypt and decrypt cookies
	260	\|encryptionpadding\|Yes\|?\|?\|Set the Encryption Padding used to encrypt and decrypt cookies
	261	\|errorpage\|Yes\|String\|/bin/loginerror/ XWiki/XWikiLogin\|Page to redirect to if there is an error logging in
	262	\|loginpage\|Yes\|String\|/bin/login/ XWiki/XWikiLogin\|Page to redirect to when not logged in
35.1	263	\|loginsubmitpage\|Yes\|String\|/loginsubmit/ XWiki/XWikiLogin\|The URL where the username and password are posted to when logging in.
34.1	264	\|logoutpage\|Yes\|String\|/bin/logout/ XWiki/XWikiLogout\|Page to redirect to after logged out
	265	\|realmname\|Yes\|String\|XWiki\|Sets the realm name
	266	\|protection\|Yes\|all, validation, encryption, none\|all\|Protection level for the "remember me" cookie functionality
35.1	267	\|unauthorized_code\|Yes\|Number\|401\|The HTTP status code to return when the login has failed.
34.1	268	\|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.
1.16	269
34.1	270	1. Only required if protection = encryption or all (default)
	271	1. Only required if protection = validation or all (default)
1.17	272
34.2	273	= Kerberos SSO Authentication =
21.1	274
34.1	275	{{warning}}
	276	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!
	277	{{/warning}}
	278
20.1	279	The following is an example of mod_auth_kerb for Apache being used to easily implement Xwiki authentication of users via by HTTP Negotiate on a linux server. This example assumes you already have a working Apache2 HTTPD and Apache Tomcat setup with mod_jk.
1.18	280
20.1	281	First of all you need to create a principal and keytab for the webserver:
34.1	282
	283	{{code}}
20.1	284	# kadmin
	285	kadmin> addprinc -randkey HTTP/wiki.example.com
	286	kadmin> ktadd -k /etc/apache2/ssl/wiki.keytab HTTP/wiki.example.com
	287	kadmin> quit
34.1	288	{{/code}}
10.1	289
20.1	290	Make sure the keytab has the right permissions and ownership:
34.1	291
	292	{{code}}
20.1	293	chown www-data:www-data /etc/apache2/ssl/wiki.keytab
	294	chmod 400 /etc/apache2/ssl/wiki.keytab
34.1	295	{{/code}}
11.1	296
20.1	297	Install mod_auth_kerb in your linux installation. On Debian or Ubuntu this would be achieved by running:
34.1	298
	299	{{code}}
20.1	300	aptitude install libapache2-mod-auth-kerb
34.1	301	{{/code}}
	302
20.1	303	Of course the installation procedure varies per Linux distribution.
	304
	305	If your xwiki installation is mounted in Apache HTTPD under /xwiki, add the following to the virtual host configuration:
34.1	306
	307	{{code}}
20.1	308	<Location /xwiki/>
	309	AuthType Kerberos
	310	AuthName "Kerberos Login"
	311	KrbAuthRealms EXAMPLE.COM
	312	Krb5Keytab "/etc/apache2/ssl/wiki.keytab"
	313	KrbMethodK5Passwd off
	314	KrbMethodNegotiate on
	315	KrbSaveCredentials on
	316	require valid-user
	317	</Location>
34.1	318	{{/code}}
20.1	319
	320	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):
34.1	321
	322	{{code}}
20.1	323	<Connector port="8009" address="127.0.0.1" enableLookups="false" tomcatAuthentication="false" redirectPort="8443" protocol="AJP/1.3" />
34.1	324	{{/code}}
20.1	325
	326	Place the authkerb.jar jar in the WEB-INF/lib directory of Xwiki in Apache Tomcat.
	327
	328	Have Xwiki use the authentication module by changing the "xwiki.authentication.authclass" property in WEB-INF/lib/xwiki.cfg file.
34.1	329
	330	{{code}}
20.1	331	xwiki.authentication.authclass=com.xpn.xwiki.user.impl.xwiki.AppServerTrustedKerberosAuthServiceImpl
34.1	332	{{/code}}
20.1	333
34.1	334	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 propperty include (without the quotes): "https:~/~/" for all secured connections or "example.com" for all example.com subdomains.
20.1	335
34.1	336	2 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 the 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.
29.1	337
34.2	338	The configuration of ldap:
29.1	339
34.1	340	{{code}}
29.1	341	xwiki.authentication.authclass=com.wiki.sso.SSOLdapAuthenicationImpl
	342	xwiki.authentication.ldap=1
	343	xwiki.authentication.ldap.server=<ad-server>
	344	xwiki.authentication.ldap.port=389
	345	xwiki.authentication.ldap.base_DN=<OU=Users,...............>
	346	#use a fixed user to attach to the ldap database,
	347	#the password is not provided with the SSOLdapAuthenicationImpl
	348	xwiki.authentication.ldap.bind_DN=<domain>\\<user>
	349	xwiki.authentication.ldap.bind_pass=<password>
	350	#Microsoft AD configuration
	351	xwiki.authentication.ldap.UID_attr=sAMAccountName
	352	xwiki.authentication.ldap.fields_mapping=name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn
	353	xwiki.authentication.ldap.group_memberfields=member,uniqueMember
	354	#LDAP group mapping
	355	xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=CN=WIKI_Admin,............\|\
	356	XWiki.XWikiAllGroup=CN=WIKI_User,...........
34.1	357	{{/code}}
29.1	358
	359	The java code
34.1	360
	361	{{code}}
29.1	362	package com.wiki.sso;
	363
	364
	365	import org.apache.commons.logging.Log;
	366	import org.apache.commons.logging.LogFactory;
	367
	368	import com.xpn.xwiki.XWikiContext;
	369	import com.xpn.xwiki.XWikiException;
	370	import com.xpn.xwiki.user.api.XWikiUser;
	371	import com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl;
	372
	373	import java.security.Principal;
	374
	375	public class SSOLdapAuthenicationImpl extends XWikiLDAPAuthServiceImpl {
	376	/**
	377	* Logging tool.
	378	*/
	379	private static final Log LOG = LogFactory.getLog(SSOLdapAuthenicationImpl.class);
	380
	381
	382	public XWikiUser checkAuth(XWikiContext context) throws XWikiException {
	383	String user = getRemoteUser(context);
	384	if ((user != null) \|\| !user.equals("")) {
	385	if (LOG.isInfoEnabled())
	386	LOG.info("Launching create user for " + user);
	387	if ( authenticate(user, context) != null ) {
	388	if (LOG.isInfoEnabled())
	389	LOG.info("Create user done for " + user);
	390	user = "XWiki." + user;
	391	context.setUser(user);
	392	System.out.println("User is set to:" + user);
	393	return new XWikiUser(user);
	394	} else {
	395	LOG.error( "User " + user + " can't be authenticated against ldap" );
	396	}
	397	}
	398	return super.checkAuth(context);
	399	}
	400
	401	/**
	402	* We cannot authenticate locally since we need to trust the app server for
	403	* authentication
	404	*
	405	* @param username
	406	* @param password
	407	* @param context
	408	* @return
	409	* @throws XWikiException
	410	*/
	411	public XWikiUser checkAuth(String username, String password,
	412	String rememberme, XWikiContext context) throws XWikiException {
	413	String user = getRemoteUser(context);
	414	if ((user == null) \|\| user.equals("")) {
	415	return super.checkAuth(username, password, rememberme, context);
	416	}
	417	return checkAuth(context);
	418	}
	419
	420	private String getRemoteUser(XWikiContext context) {
	421	String userName = context.getRequest().getHttpServletRequest()
	422	.getRemoteUser();
	423	if (userName != null) {
	424	// only take the front of the username@domain
	425	String[] elements = userName.split("@", 2);
	426	userName = elements[0];
	427	}
	428	return userName;
	429	}
	430
	431	public Principal authenticate(String login, XWikiContext context) throws XWikiException
	432	{
	433	if (LOG.isTraceEnabled()) {
	434	LOG.trace("Starting LDAP authentication");
	435	}
	436
	437	/*
	438	* TODO: Put the next 4 following "if" in common with XWikiAuthService to ensure coherence This method was
	439	* returning null on failure so I preserved that behaviour, while adding the exact error messages to the context
	440	* given as argument. However, the right way to do this would probably be to throw XWikiException-s.
	441	*/
	442
	443	if (login == null) {
	444	// If we can't find the username field then we are probably on the login screen
	445
	446	if (LOG.isDebugEnabled()) {
	447	LOG.debug("The provided user is null."
	448	+ " We don't try to authenticate, it probably means the user is in non logged mode.");
	449	}
	450
	451	return null;
	452	}
	453
	454	// Check for empty usernames
	455	if (login.equals("")) {
	456	context.put("message", "nousername");
	457
	458	if (LOG.isDebugEnabled()) {
	459	LOG.debug("LDAP authentication failed: login empty");
	460	}
	461
	462	return null;
	463	}
	464
	465	// If we have the context then we are using direct mode
	466	// then we should specify the database
	467	// This is needed for virtual mode to work
	468	Principal principal = null;
	469
	470	// Try authentication against ldap
	471	principal = ldapAuthenticate(login, "", context);
	472
	473	if (LOG.isDebugEnabled()) {
	474	if (principal != null) {
	475	LOG.debug("LDAP authentication succeed with principal [" + principal.getName() + "]");
	476	} else {
	477	LOG.debug("LDAP authentication failed for user [" + login + "]");
	478	}
	479	}
	480
	481	return principal;
	482	}
	483	}
34.1	484	{{/code}}

Wiki source code of User Authentication

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