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1 Here you can find some detailed uses cases of LDAP authentication configuration:
2
3 {{toc/}}
4
5 = Active Directory =
6
7 Here are the values of the properties you need to set if your LDAP server implementation is Microsoft Active Directory:
8
9 * **ldap_server**: name/IP of AD server machine
10 * **ldap_port**: port //(e.g. 389)//
11 * **ldap_base_DN**: name of root DN //(e.g. dc=ad,dc=company,dc=com)//
12 * **ldap_bind_DN**: domain{0} //(e.g. ad{0} where {0} will be replaced by username during validation)//
13 * **ldap_bind_pass**: {1} //(where {1} will be replaced by password during validation)//
14 * **ldap_UID_attr**: sAMAccountName
15 * **ldap_fields_mapping**: name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,email=mail,ldap_dn=dn
16
17 Example:
18
19 {{code}}
20 xwiki.authentication.ldap.server=adserver
21 xwiki.authentication.ldap.port=389
22 xwiki.authentication.ldap.base_DN=dc=subdomain,dc=domain,dc=suffix
23 xwiki.authentication.ldap.bind_DN=subdomain\\{0}
24 xwiki.authentication.ldap.bind_pass={1}
25 xwiki.authentication.ldap.UID_attr=sAMAccountName
26 xwiki.authentication.ldap.fields_mapping=name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,email=mail,ldap_dn=dn
27 {{/code}}
28
29 = Apple Open Directory Server =
30
31 In order to set this up your **xwiki.cfg** file should have the attributes below set like this:
32
33 {{code}}
34 xwiki.authentication.ldap.bind_DN=uid={0},cn=users,dc=sub,dc=domain,dc=tld
35 xwiki.authentication.ldap.bind_pass={1}
36 xwiki.authentication.ldap.UID_attr=uid
37 xwiki.authentication.ldap.group_classes=apple-group
38 xwiki.authentication.ldap.group_memberfields=memberUid,uid
39 {{/code}}
40
41 Note that if you set it up like this the users logging will need the right to list group members in LDAP server.
42
43 = Open Directory Server (OpenDS) =
44
45 Here are the values of the properties you need to set if you would like to **authorize only members of a group to log-in**. In this case, the group is cn=xwiki,ou=roles,dc=domain,dc=tld
46
47 {{code}}
48 xwiki.authentication.ldap.server=ldap.domain.tld
49 xwiki.authentication.ldap.port=389
50
51 xwiki.authentication.ldap.bind_DN=
52 xwiki.authentication.ldap.bind_pass=
53
54 xwiki.authentication.ldap.base_DN=ou=people,dc=domain,dc=tld
55 xwiki.authentication.ldap.UID_attr=cn
56
57 xwiki.authentication.ldap.group_classes=groupOfNames
58 xwiki.authentication.ldap.group_memberfields=memberUid
59 xwiki.authentication.ldap.user_group=cn=xwiki,ou=roles,dc=domain,dc=tld
60 {{/code}}
61
62 **bind_DN** and **bind_pass** are both empty. The connection to the LDAP server will be anonymous. With OpenDS an anonymous connection can read some needed attributes like userPassword, home, etc.
63
64 = Generic =
65
66 == I want to have LDAP on ##subwiki1## but not on ##subwiki2## ==
67
68 Each wiki can have it's own LDAP setup. When LDAP fail on a subwiki it fallback on main wiki.
69
70 Two possibilities:
71
72 === Disable LDAP by default for all wikis and then enable it only in wikis where you want it ===
73
74 * disable LDAP at xwiki.cfg level (which is the default configuration for all wikis)(((
75 {{code language="properties"}}
76 xwiki.authentication.ldap=0
77 {{/code}}
78 )))*enable it only in subwikis where we want it: can be done by directly editing XWiki.XWikiReference document with object editor (http://ldapwiki.mydomain.org/xwiki/bin/edit/XWiki/XWikiPreferences?editor=objet) or using [[extensions:Extension.LDAP Application]].
79
80 === Enable LDAP by default for all wikis and then disable it only on wikis where you don't want it ===
81
82 * enable LDAP at xwiki.cfg level (which is the default configuration for all wikis)(((
83 {{code language="properties"}}
84 xwiki.authentication.ldap=1
85 {{/code}}
86 )))
87 * disable it only in subwikis where we want it: can be done by directly editing XWiki.XWikiReference document with object editor (http://ldapwiki.mydomain.org/xwiki/bin/edit/XWiki/XWikiPreferences?editor=objet) or using [[extensions:Extension.LDAP Application]].
88
89 {{warning}}
90 Righs now the authenticator always fallback on main wiki when LDAP is disabled or does not work on subwiki. That mean it's not possible to have LDAP auth working when logging in from main wiki but and failing when logging in from a subwiki. In such a case you will be logged with a global user (main wiki user), same as if you were accessing main wiki and then subwiki in the same session.
91
92 But what you can do in this case is to not allow main wiki users from accessing the subwiki which will essentially have the same result.
93 {{/warning}}
94
95 == I want to be able to reuse LDAP users membership in XWiki ==
96
97 E.g. if you want all the LDAP users of the group ##cn=HMS Lydia,ou=crews,ou=groups,o=sevenSeas## to be automatically added in the XWiki group ##XWiki.XWikiAdminGroup## when the user logs in, set:
98
99 {{code}}
100 xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=cn=HMS Lydia,ou=crews,ou=groups,o=sevenSeas
101 {{/code}}
102
103 If you want to add more mapping add them separated by ##|##:
104
105 {{code}}
106 xwiki.authentication.ldap.group_mapping=XWiki.XWikiAdminGroup=cn=HMS Lydia,ou=crews,ou=groups,o=sevenSeas|\
107 XWiki.OtherXWikiGroup=HMS Victory,ou=crews,ou=groups,o=sevenSeas
108 {{/code}}
109
110 == My users are not located in the same organization unit ==
111
112 So you can't use the ##xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP## pattern.
113
114 The trick here is to to connect to LDAP with a user able to list LDAP users (and groups if you want to do membership synchronization).
115
116 To handle that LDAP authentication automatically searches for the user's DN trying to match the provided login with ##xwiki.authentication.ldap.UID_attr## attribute value. So simply set an existing administrator DN (or any other LDAP user with the right to search in the whole LDAP server) at ##xwiki.authentication.ldap.bind_DN## and its password at ##xwiki.authentication.ldap.bind_pass##. LDAP authentication will use it to connect to the LDAP server, search for the provided user and bind the found DN with the provided password to validate it.
117
118 For example if you have an admin user with the DN = "cn=Administrator,dc=mydomain,dc=org" and password "pass" set:
119
120 {{code}}
121 xwiki.authentication.ldap.bind_DN=cn=Administrator,dc=mydomain,dc=org
122 xwiki.authentication.ldap.bind_pass=pass
123 {{/code}}
124
125 == My users are not located on the same server ==
126
127 E.g. if you use several subdomains and the users are defined separately in each subdomain. This will likely be the case when you have a configuration like this:
128
129 {{code}}
130 sub1.somedomain.com
131 sub2.somedomain.com
132 sub3.somedomain.com
133 ...
134 {{/code}}
135
136 XWiki cannot search in multiple domains (as of XWiki 1.5).
137
138 === Approach 1: Configure group membership login ===
139
140 One possible solution is to make one (or more) group(s) in your AD and set the group membership to all users that have to have access to your wiki. Then configure XWiki to only let members of that group log in. If a user wants to log in, XWiki will look up if the user's credentials are found in the group member attributes in AD. With this setting, XWiki will ignore the base_DN search, if a user was found in that group.
141
142 {{info}}
143 The group membership attribute in AD (in its default configuration) will contain the CN ("FirstName LastName") - not the sAMAccountName. So your users will have to login with their full name instead of their username.
144 {{/info}}
145
146 == I'm in a multiwiki environment and I want my LDAP users to register only on the main wiki ==
147
148 Each wiki can have its own LDAP configuration (even enable/disable LDAP) in the ##XWiki.XWikiPreference## page (edit it in [[objects mode>>platform:Features.PageEditing||anchor="HAdvancedMode"]]. See [[How to navigate to a page>>xwiki:FAQ.How can I navigate to a given page]]). What you can find in the ##xwiki.cfg## configuration file is just the default LDAP configuration and it can be overridden in subwikis.
149
150 When the LDAP authenticator fails to authenticate to a wiki it will try in the main wiki.
151
152 In order to forbid LDAP authentication to create users on subwikis you can use one of the following ways:
153
154 * disable LDAP in **xwiki.cfg** and enable it in the main wiki by choosing "Yes" in the "Ldap" field of ##XWiki.XWikiPreference## page object
155 * disable LDAP in every sub-wikis by choosing "No" in the "Ldap" field of ##XWiki.XWikiPreference## page object
156
157 == I want to allow access to users depending on a specific attribute on their LDAP entry ==
158
159 For example, suppose you want to prevent access to the wiki for deactivated users, and you have an attribute in LDAP showing the current status of the user.
160
161 Typically, you may have this kind of attribute:
162
163 * For Zimbra based LDAP, an active account has this attribute: **zimbraAccountStatus=active**
164 * For ActiveDirectory, a deactivated account has this attribute: **userAccountControl:1.2.840.113556.1.4.803:=2**
165 * Or you can have your own attribute in your private schema, for example: **accountstatus=active**
166
167 In this case, you just have to modify the **xwiki.authentication.ldap.user_group** value by putting the filter corresponding to what you want. Using the same example as above, you'll have:
168
169 * For Zimbra based LDAP:(((
170 {{code}}
171 xwiki.authentication.ldap.user_group=(zimbraAccountStatus=active)
172 {{/code}}
173 )))
174 * For ActiveDirectory:(((
175 {{code}}
176 xwiki.authentication.ldap.user_group=(!(userAccountControl:1.2.840.113556.1.4.803:=2))
177 {{/code}}
178 )))
179 * For a private attribute:(((
180 {{code}}
181 xwiki.authentication.ldap.user_group=(accountstatus=active)
182 {{/code}}
183 )))
184
185 You can of course use any kind of filter. For instance, you can check if the account is active and has any other attribute, like an attribute listing the different services the user can access:
186
187 {{code}}
188 xwiki.authentication.ldap.user_group=(&(accountstatus=active)(allowedservice=xwiki))
189 {{/code}}
190
191 == Use LDAP over SSL (ldaps authentication) ==
192
193 To adds support for SSL connections to the ldap server you need:
194
195 * to set (xwiki.authentication.ldap.ssl) parameter in xwiki.cfg(((
196 {{code language="properties"}}
197 #-# SSL connection to LDAP server
198 #-# - 0: normal
199 #-# - 1: SSL
200 #-# The default is 0
201 xwiki.authentication.ldap.ssl=1
202 {{/code}}
203 )))
204 * and add to the trust store of the JSSE extension the CA certificate which delivered the SSL certificate of the ldap server.(((
205 From the Sun JSSE documentation: The search order for the locating the trust store is:
206
207 1. ##<java-home>/lib/security/jssecacerts, then##
208 1. ##<java-home>/lib/security/cacerts##
209 If the file jssecacerts exists, then cacerts is not consulted. So in order to make it work you have to create a trust store named jssecacerts with the following command and place it in the suitable directory of the JRE or JDK used by your container:
210 {{code}}keytool -import -trustcacerts -alias ca -file cacert.crt -keystore jssecacerts{{/code}}
211 (answer yes when asked if you want to trust the certificate). I read on the web the default password for cacerts is 'changeit' so I used that, I didn't try yet with another password for the trust store.
212 Since xwiki 8.3, the default extension repositories use httpS and if the file jssecacerts already exists (ie for ldapS in xwiki previous version) then cacerts is not consulted and extension update (and probably install too) display an error: //unable to find valid certification path to requested target//.
213 The problem is:
214
215 * cacerts containing all certificate/keys (and the one for httpS extension repositories)
216 * (((
217 jssecacerts containing only ldapS certificate
218 Then, to use ldapS and extension update, you must import ldapS certicate in existent cacerts file instead to create a new one (and rename it in jssecacerts to not forget it)
219
220 {{code language="bash"}}
221 cp <java-home>/lib/security/cacerts <java-home>/jre/lib/security/cacerts.ori
222 <java-home>/bin/keytool -import -trustcacerts -alias ca -file /my/path/ToLdapS/cert/MyLdapCertificate.pem -keystore <java-home>/lib/security/cacerts
223 mv <java-home>/lib/security/cacerts <java-home>/lib/security/jssecacerts
224 mv <java-home>/lib/security/cacerts.ori <java-home>/jre/lib/security/cacerts
225 {{/code}}
226 )))
227 )))

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