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1 1 User Authentication
2
3 XWiki supports several different authentication mechanisms for authenticating users:
4 #toc("" "" "")
5
6 The form authentication is the default mechanism.
7
8 #info("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
10 1.1 Form Authentication
11
12 TODO
13
14 1.1 LDAP Authentication
15
16 #warning("New LDAP implementation since XWiki Platform 1.3M2, see [previous LDAP authentication service documentation>AuthenticationLdapOld]")
17
18 1.1.1 Generic LDAP configuration
19
20 In order to enable the LDAP support you have to change the authentication method in ~~WEB-INF/xwiki.cfg~~ as follows:
21 {code}
22 ## Turn LDAP authentication on - otherwise only XWiki authentication
23 ## 0 : disable
24 ## 1 : enable
25 xwiki.authentication.ldap=1
26
27 ## set LDAP as authentication service
28 xwiki.authentication.authclass=com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl
29
30 {code}
31
32 You can setup the LDAP configuration in the ~~xwiki.cfg~~ file by filling the following properties:
33
34 {code:none}
35 ## LDAP Server (Active Directory, eDirectory, OpenLDAP, etc.)
36 xwiki.authentication.ldap.server=156.58.101.204
37 xwiki.authentication.ldap.port=389
38
39 ## LDAP login, empty = anonymous access, otherwise specify full dn
40 ## {0} is replaced with the username, {1} with the password
41 xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP
42 xwiki.authentication.ldap.bind_pass={1}
43
44 ## Force to check password after LDAP connection
45 ## 0: disable
46 ## 1: enable
47 xwiki.authentication.ldap.validate_password=0
48
49 ## only members of the following group will be verified in the LDAP
50 ## otherwise only users that are found after searching starting from the base_DN
51 xwiki.authentication.ldap.user_group=cn=developers,ou=groups,o=MegaNova,c=US
52
53 ## only users not member of the following group can autheticate
54 xwiki.authentication.ldap.exclude_group=cn=admin,ou=groups,o=MegaNova,c=US
55
56 ## base DN for searches
57 xwiki.authentication.ldap.base_DN=
58 department=USER,department=INFORMATIK,department=1230,o=MP
59
60 ## specifies the LDAP attribute containing the identifier to be used as the XWiki name (default=cn)
61 xwiki.authentication.ldap.UID_attr=cn
62
63 ## retrieve the following fields from LDAP and store them in the XWiki user object (xwiki-attribute=ldap-attribute)
64 xwiki.authentication.ldap.fields_mapping=last_name=sn,first_name=givenName,fullname=fullName,email=mail,ldap_dn=dn
65
66 # on every login update the mapped attributes from LDAP to XWiki otherwise this happens only once when the XWiki account is created.
67 xwiki.authentication.ldap.update_user=1
68
69 ## maps XWiki groups to LDAP groups, separator is "|"
70 xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=cn=AdminRole,ou=groups,o=MegaNova,c=US|\
71 XWiki.Organisation=cn=testers,ou=groups,o=MegaNova,c=US
72
73 ## time in seconds after which the list of members in a group is refreshed from LDAP (default=3600*6)
74 xwiki.authentication.ldap.groupcache_expiration=21800
75
76 ## - create : synchronize group membership only when the user is first created
77 ## - always: synchronize on every login
78 xwiki.authentication.ldap.mode_group_sync=always
79
80 ## if ldap authentication fails for any reason, try XWiki DB authentication with the same credentials
81 xwiki.authentication.ldap.trylocal=1
82
83 ## SSL connection to LDAP server
84 ## 0 : normal
85 ## 1 : SSL
86 xwiki.authentication.ldap.ssl=1
87
88 ## The keystore file to use in SSL connection
89 xwiki.authentication.ldap.ssl.keystore=
90 {code}
91
92 #info("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 <tt>xwiki.authentication.ldap.base_DN</tt> become <tt>ldap_base_DN</tt>")
93
94 1.1.1 LDAP Configuration for Active Directory
95
96 Here are values of the properties you need to set if your LDAP server implementation is Miscrosoft Active Directory:
97 - *ldap_server*: name/IP of AD server machine
98 - *ldap_port*: port ~~(e.g. 389)~~
99 - *ldap_base_DN*: name of root DN ~~(e.g. dc=ad,dc=company,dc=com)~~
100 - *ldap_bind_DN*: domain\{0\} ~~(e.g. ad\{0\} where \{0\} will be replaced by username during validation)~~
101 - *ldap_bind_pass*: \{1\} ~~(where \{1\} will be replaced by password during validation)~~
102 - *ldap_UID_attr*: sAMAccountName
103 - *ldap_fields_mapping*: name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn
104
105 Example:
106 {code}
107 xwiki.authentication.authclass=com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl
108 xwiki.authentication.ldap=1
109 xwiki.authentication.ldap.server=adserver
110 xwiki.authentication.ldap.port=389
111 xwiki.authentication.ldap.base_DN=dc=subdomain,dc=domain,dc=suffix
112 xwiki.authentication.ldap.bind_DN=subdomain\\{0}
113 xwiki.authentication.ldap.bind_pass={1}
114 xwiki.authentication.ldap.UID_attr=sAMAccountName
115 xwiki.authentication.ldap.fields_mapping=name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn
116 {code}
117
118 The bind_DN and bind_pass fields contain the username and password for binding to the LDAP server in order to search, which will not necessarily be the same credentials as the user logging in.
119
120
121 The exact details of this configuration will vary based on your server configuration. It may not be necessary to prefix the username (represented by {0}) with the subdomain.
122
123 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.
124
125 This java client, [LDAP Browser/Editor > http://www-unix.mcs.anl.gov/~gawor/ldap/] is a handy tool for checking your configuration.
126
127 1.1.1 Detailed use cases
128
129 See [LDAP configuration uses cases>LDAPAuthenticationUseCases] for some detailed use cases.
130
131 1.1.1 Enable LDAP debug log
132
133 See [AdminGuide.Logging]. The specific targets for LDAP authetication are:
134 {code}
135 log4j.logger.com.xpn.xwiki.plugin.ldap=debug
136 log4j.logger.com.xpn.xwiki.user.impl.LDAP=debug
137 {code}
138 1.1 eXo Authentication
139
140 The eXo authentication is used automatically by adding/editing the ~~xwiki.exo=1~~ property in ~~WEB-INF/xwiki.cfg~~.
141
142 1.1 Custom Authentication
143
144 This allows plugging to any existing authentication mechanism such as SiteMinder, etc. To configure a custom authentication do the following:
145 # Implement the XWikiAuthService interface.
146 # Edit the ~~WEB-INF/xwiki.cfg~~ file and add a ~~xwiki.authentication.authclass~~ property pointing to your class. For example:
147
148 {code}
149 xwiki.authentication.authclass = com.acme.MyCustomAuthenticationService
150 {code}
151
152 Note, that you also can implement own right management service by implementing XWikiRightService interface:
153 {code}
154 xwiki.authentication.rightsclass = com.acme.MyCustomRightsService
155 {code}
156
157 and group service by implementing XWikiGroupService and setting ~~xwiki.authentication.groupclass~~ property.
158
159
160
161
162
163 1.1 Authentication parameters
164
165 You can set each of these parameters by setting:
166
167 {code}
168 xwiki.authentication.~~param_name~~=~~param_value~~
169 {code}
170
171 {table}
172 Name | Optional | Allowed values | Default value | Description
173 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.
174 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.
175 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
176 cookielife | Yes | Number | 14 | Number of days cookies take to expire
177 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~~
178 default_page | Yes | String | /bin/view/ Main/WebHome | Page to redirect to if xredirect parameter is not set
179 encryptionalgorithm | Yes | ? | ? | Set the Encryption Algorithm used to encrypt and decrypt cookies
180 encryptionmode | Yes | ? | ? | Set the Encryption Mode used to encrypt and decrypt cookies
181 encryptionpadding | Yes | ? | ? | Set the Encryption Padding used to encrypt and decrypt cookies
182 errorpage | Yes | String | /bin/loginerror/ XWiki/XWikiLogin | Page to redirect to if there is an error logging in
183 loginpage | Yes | String | /bin/login/ XWiki/XWikiLogin | Page to redirect to when not logged in
184 loginsubmitpage | Yes | String | /loginsubmit/ XWiki/XWikiLogin | ?
185 logoutpage | Yes | String | /bin/logout/ XWiki/XWikiLogout | Page to redirect to after logged out
186 realmname | Yes | String | XWiki | Sets the realm name
187 protection | Yes | all, validation, encryption, none | all | Protection level for the "remember me" cookie functionality
188 unauthorized_code | Yes | ? | ? | ?
189 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.
190 {table}
191 # Only required if protection = encryption or all (default)
192 # Only required if protection = validation or all (default)
193
194 1.1 Kerberos SSO Authentication
195
196 #warning("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!")
197
198 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.
199
200 First of all you need to create a principal and keytab for the webserver:
201 {code}
202 # kadmin
203 kadmin> addprinc -randkey HTTP/wiki.example.com
204 kadmin> ktadd -k /etc/apache2/ssl/wiki.keytab HTTP/wiki.example.com
205 kadmin> quit
206 {code}
207
208 Make sure the keytab has the right permissions and ownership:
209 {code}
210 chown www-data:www-data /etc/apache2/ssl/wiki.keytab
211 chmod 400 /etc/apache2/ssl/wiki.keytab
212 {code}
213
214 Install mod_auth_kerb in your linux installation. On Debian or Ubuntu this would be achieved by running:
215 {code}
216 aptitude install libapache2-mod-auth-kerb
217 {code}
218 Of course the installation procedure varies per Linux distribution.
219
220 If your xwiki installation is mounted in Apache HTTPD under /xwiki, add the following to the virtual host configuration:
221 {code}
222 <Location /xwiki/>
223 AuthType Kerberos
224 AuthName "Kerberos Login"
225 KrbAuthRealms EXAMPLE.COM
226 Krb5Keytab "/etc/apache2/ssl/wiki.keytab"
227 KrbMethodK5Passwd off
228 KrbMethodNegotiate on
229 KrbSaveCredentials on
230 require valid-user
231 </Location>
232 {code}
233
234 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):
235 {code}
236 <Connector port="8009" address="127.0.0.1" enableLookups="false" tomcatAuthentication="false" redirectPort="8443" protocol="AJP/1.3" />
237 {code}
238
239 Place the authkerb.jar jar in the WEB-INF/lib directory of Xwiki in Apache Tomcat.
240
241 Have Xwiki use the authentication module by changing the "xwiki.authentication.authclass" property in WEB-INF/lib/xwiki.cfg file.
242 {code}
243 xwiki.authentication.authclass=com.xpn.xwiki.user.impl.xwiki.AppServerTrustedKerberosAuthServiceImpl
244 {code}
245
246 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.

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