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2.2. Enabling LDAP Authentication

Overview
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Red Hat JBoss A-MQ supplies a JAAS login module that enables it to use LDAP to authenticate users. The JBoss A-MQ JAAS LDAP login module is implemented by the org.apache.karaf.jaas.modules.ldap.LDAPLoginModule class. It is preloaded in the container, so you do not need to install its bundle.

Procedure
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To enable JBoss A-MQ to use LDAP for user authentication you need to create a JAAS realm that includes the JBoss A-MQ LDAP login module. As shown in Example 2.6, “Red Hat JBoss A-MQ LDAP JAAS Login Module”, this is done by adding a jaas:module element to the realm and setting its className attribute to org.apache.karaf.jaas.modules.ldap.LDAPLoginModule.

Example 2.6. Red Hat JBoss A-MQ LDAP JAAS Login Module

<jaas:config ... >
  <jaas:module className="org.apache.karaf.jaas.modules.ldap.LDAPLoginModule"
               flags="required">
    ...
  </jaas:module>
</jaas:config>
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You will also need to provide values for the properties described in Table 2.2, “Properties for the Red Hat JBoss A-MQ LDAP Login Module”.

LDAP properties
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Table 2.2, “Properties for the Red Hat JBoss A-MQ LDAP Login Module” describes the properties used to configure the JBoss A-MQ JAAS LDAP login module.
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Table 2.2. Properties for the Red Hat JBoss A-MQ LDAP Login Module
PropertyDescription
connection.url Specifies specify the location of the directory server using an ldap URL, ldap://Host:Port. You can optionally qualify this URL, by adding a forward slash, /, followed by the DN of a particular node in the directory tree.
connection.username Specifies the DN of the user that opens the connection to the directory server. For example, uid=admin,ou=system.
connection.password Specifies the password that matches the DN from connection.username. In the directory server, the password is normally stored as a userPassword attribute in the corresponding directory entry.
user.base.dn Specifies the DN of the subtree of the DIT to search for user entries.
user.filter Specifies the LDAP search filter used to locate user credentials. It is applied to the subtree selected by user.base.dn. Before being passed to the LDAP search operation, the value is subjected to string substitution such that all occurrences of %u are replaced by the user name extracted from the incoming credentials.
user.search.subtree Specifies if the user entry search's scope includes the subtrees of the tree selected by user.base.dn.
role.base.dn Specifies the DN of the subtree of the DIT to search for role entries.
role.filter Specifies the LDAP search filter used to locate roles. It is applied to the subtree selected by role.base.dn. Before being passed to the LDAP search operation, the value is subjected to string substitution such that all occurrences of %u are replaced by the user name extracted from the incoming credentials.
role.name.attribute Specifies the attribute type of the role entry that contains the name of the role/group. If you omit this option, the role search feature is effectively disabled.
role.search.subtree Specifies if the role entry search's scope includes the subtrees of the tree selected by role.base.dn.
authentication
Specifies the authentication method used when binding to the LDAP server. Valid values are
  • simple—bind with user name and password authentication
  • none—bind anonymously
initial.context.factory Specifies the class of the context factory used to connect to the LDAP server. This must always be set to com.sun.jndi.ldap.LdapCtxFactory.
ssl Specifies if the connection to the LDAP server is secured via SSL. If connection.url starts with ldaps:// SSL is used regardless of this property.
ssl.provider Specifies the SSL provider to use for the LDAP connection. If not specified, the default SSL provider is used.
ssl.protocol Specifies the protocol to use for the SSL connection. You must set this property to TLSv1, in order to prevent the SSLv3 protocol from being used (POODLE vulnerability).
ssl.algorithm Specifies the algorithm used by the trust store manager.
ssl.keystore Specifies the keystore name.
ssl.keyalias Specifies the name of the private key in the keystore.
ssl.truststore Specifies the trust keystore name.
All of the properties are mandatory except the SSL properties.

Example
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Example 2.7, “Configuring a JAAS Realm that Uses LDAP Authentication” defines a JAAS realm that uses the LDAP server located at ldap://localhost:10389.

Example 2.7. Configuring a JAAS Realm that Uses LDAP Authentication

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
  xmlns:jaas="http://karaf.apache.org/xmlns/jaas/v1.0.0"
  xmlns:ext="http://aries.apache.org/blueprint/xmlns/blueprint-ext/v1.0.0">

  <jaas:config name="karaf" rank="1">
    <jaas:module className="org.apache.karaf.jaas.modules.ldap.LDAPLoginModule"
                 flags="sufficient">
      initialContextFactory=com.sun.jndi.ldap.LdapCtxFactory
      connection.username=uid=admin,ou=system
      connection.password=secret
      connection.protocol=
      connection.url = ldaps://localhost:10636
      user.base.dn = ou=users,ou=system
      user.filter = (uid=%u)
      user.search.subtree = true
      role.base.dn = ou=roles,ou=system,dc=jbossfuse
      role.filter = (uid=%u)
      role.name.attribute = cn
      role.search.subtree = true
      authentication = simple
      ssl.protocol=TLSv1
      ssl.truststore=truststore
      ssl.algorithm=PKIX
    </jaas:module>
    ...
  </jaas:config>
</blueprint>
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Important
You must set ssl.protocol to TLSv1, in order to protect against the Poodle vulnerability (CVE-2014-3566)
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