User Authentication

XWiki supports several different authentication mechanisms for authenticating users:

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The form authentication is the default mechanism.

Note that currently XWiki allows only one method of authentication to be enabled at a time which means you cannot implement policies such as if the user is not found in LDAP then check if he's in the XWiki database. This will probably be improved in the future.

Form Authentication

TODO

LDAP Authentication

Generic LDAP configuration

In order to enable the LDAP support you have to change the authentication method in WEB-INF/xwiki.cfg as follows:

xwiki.authentication.ldap=1

You can setup the LDAP configuration in the xwiki.cfg file by filling the following properties:

  • xwiki.authentication.ldap.server
    • LDAP server, either an IP address or a host name. For example: localhost
  • xwiki.authentication.ldap.port
    • LDAP server port number. Typical value is 389.
  • xwiki.authentication.ldap.check_level
    • The default value is 2 if this property is not defined. Here are the possible values
      • checklevel 0: LDAP connection login to LDAP is sufficient
      • checklevel 1: Login & username located, attributes loaded
      • checklevel 2: Compare password for user (e.g. necessary if the LDAP bind didn't use the user's credentials)
  • xwiki.authentication.ldap.base_DN
  • xwiki.authentication.ldap.bind_DN
  • xwiki.authentication.ldap.bind_pass
  • xwiki.authentication.ldap.UID_attr
  • xwiki.authentication.ldap.fields_mapping

Example:

xwiki.authentication.ldap=1
xwiki.authentication.ldap.authclass=com.xpn.xwiki.user.impl.LDAP.LDAPAuthServiceImpl
xwiki.authentication.ldap.server=dsmaster
xwiki.authentication.ldap.check_level=1
xwiki.authentication.ldap.port=389
xwiki.authentication.ldap.base_DN=department=USER,department=INFORMATIK,department=1230,o=MP
xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP
xwiki.authentication.ldap.bind_pass={1}
xwiki.authentication.ldap.UID_attr=uid

You can also setup the LDAP configuration in XWiki.XWikiPreferences page by going to the class editor and adding the following fields:

  • ldap_server
  • ldap_port
  • ldap_check_level
  • ldap_base_DN
  • ldap_bind_DN
  • ldap_bind_pass
  • ldap_UID_attr
  • ldap_fields_mapping

LDAP Configuration for Active Directory

Here are values of the properties you need to set if your LDAP server implementation is Miscrosoft Active Directory:

  • ldap_server: name/IP of AD server machine
  • ldap_port: port (e.g. 389)
  • ldap_check_level: 1
  • ldap_base_DN: name of root DN (e.g. dc=ad,dc=company,dc=com)
  • ldap_bind_DN: domain{0} (e.g. ad{0} where {0} will be replaced by username during validation)
  • ldap_bind_pass: {1} (where {1} will be replaced by password during validation)
  • ldap_UID_attr: sAMAccountName
  • ldap_fields_mapping: name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn

Example:

xwiki.authentication.ldap=1
xwiki.authentication.ldap.authclass=com.xpn.xwiki.user.impl.LDAP.LDAPAuthServiceImpl
xwiki.authentication.ldap.server=adserver
xwiki.authentication.ldap.check_level=1
xwiki.authentication.ldap.port=389
xwiki.authentication.ldap.base_DN=dc=subdomain,dc=domain,dc=suffix
xwiki.authentication.ldap.bind_DN=subdomain\\{0}
xwiki.authentication.ldap.bind_pass={1}
xwiki.authentication.ldap.UID_attr=sAMAccountName
xwiki.authentication.ldap.fields_mapping=name=sAMAccountName,last_name=sn,first_name=givenName,fullname=displayName,mail=mail,ldap_dn=dn

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.

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.

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.

This java client, LDAP Browser/Editor is a handy tool for checking your configuration.

eXo Authentication

The eXo authentication is used automatically by adding/editing the xwiki.exo=1 property in WEB-INF/xwiki.cfg.

Custom Authentication

This allows plugging to any existing authentication mechanism such as SiteMinder, etc. To configure a custom authentication do the following:

  1. Implement the XWikiAuthService interface.
  2. Edit the WEB-INF/xwiki.cfg file and add a xwiki.authentication.authclass property pointing to your class. For example:
xwiki.authentication.authclass = com.acme.MyCustomAuthenticationService

Note, that you also can implement own right management service by implementing XWikiRightService interface:

xwiki.authentication.roghtsclass = com.acme.MyCustomRightsService

and group service by implementing XWikiGroupService and setting xwiki.authentication.groupclass parameter.

Authentication parameters

You can set each of these parameters by setting:

xwiki.authentication.~~param_name~~=~~param_value~~
NameOptionalAllowed valuesDefault valueDescription
encryptionKeyNo(1)?n/aSet 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.
validationKeyNo(2)?n/aSet 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.
cookiedomainsYesStringServer host nameWhich host(s) should your cookies be sent to; use only if you want to share cookies across domains, otherwise should be commented out
cookielifeYesNumber14Number of days cookies take to expire
cookiepathYesString/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
default_pageYesString/bin/view/ Main/WebHomePage to redirect to if xredirect parameter is not set
encryptionalgorithmYes??Set the Encryption Algorithm used to encrypt and decrypt cookies
encryptionmodeYes??Set the Encryption Mode used to encrypt and decrypt cookies
encryptionpaddingYes??Set the Encryption Padding used to encrypt and decrypt cookies
errorpageYesString/bin/loginerror/ XWiki/XWikiLoginPage to redirect to if there is an error logging in
loginpageYesString/bin/login/ XWiki/XWikiLoginPage to redirect to when not logged in
loginsubmitpageYesString/loginsubmit/ XWiki/XWikiLogin?
logoutpageYesString/bin/logout/ XWiki/XWikiLogoutPage to redirect to after logged out
realnameYesStringXWikiSets the realm name (should be realmname???)
protectionYesall, validation, encryption, noneallProtection level for the "remember me" cookie functionality
unauthorized_codeYes???
useipYestrue / falsetrueSpecify to use the IP address when encrypting the cookie data; if IP address changes will need to re-login.
  1. Only required if protection = encryption or all (default)
  2. Only required if protection = validation or all (default)
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