| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.guacamole.auth.cas.group; |
| |
| import javax.naming.InvalidNameException; |
| import javax.naming.ldap.LdapName; |
| import javax.naming.ldap.Rdn; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * GroupParser that converts group names from LDAP DNs into normal group names, |
| * using the last (leftmost) attribute of the DN as the name. Groups may |
| * optionally be restricted to only those beneath a specific base DN, or only |
| * those using a specific attribute as their last (leftmost) attribute. |
| */ |
| public class LDAPGroupParser implements GroupParser { |
| |
| /** |
| * Logger for this class. |
| */ |
| private static final Logger logger = LoggerFactory.getLogger(LDAPGroupParser.class); |
| |
| /** |
| * The LDAP attribute to require for all accepted group names. If null, any |
| * LDAP attribute will be allowed. |
| */ |
| private final String nameAttribute; |
| |
| /** |
| * The base DN to require for all accepted group names. If null, ancestor |
| * tree structure will not be considered in accepting/rejecting a group. |
| */ |
| private final LdapName baseDn; |
| |
| /** |
| * Creates a new LDAPGroupParser which applies the given restrictions on |
| * any provided group names. |
| * |
| * @param nameAttribute |
| * The LDAP attribute to require for all accepted group names. This |
| * restriction applies to the last (leftmost) attribute only, which is |
| * always used to determine the name of the group. If null, any LDAP |
| * attribute will be allowed in the last (leftmost) position. |
| * |
| * @param baseDn |
| * The base DN to require for all accepted group names. If null, |
| * ancestor tree structure will not be considered in |
| * accepting/rejecting a group. |
| */ |
| public LDAPGroupParser(String nameAttribute, LdapName baseDn) { |
| this.nameAttribute = nameAttribute; |
| this.baseDn = baseDn; |
| } |
| |
| @Override |
| public String parse(String casGroup) { |
| |
| // Reject null/empty group names |
| if (casGroup == null || casGroup.isEmpty()) |
| return null; |
| |
| // Parse group as an LDAP DN |
| LdapName group; |
| try { |
| group = new LdapName(casGroup); |
| } |
| catch (InvalidNameException e) { |
| logger.debug("CAS group \"{}\" has been rejected as it is not a " |
| + "valid LDAP DN.", casGroup, e); |
| return null; |
| } |
| |
| // Reject any group that is not beneath the base DN |
| if (baseDn != null && !group.startsWith(baseDn)) |
| return null; |
| |
| // If a specific name attribute is defined, restrict to groups that |
| // use that attribute to distinguish themselves |
| Rdn last = group.getRdn(group.size() - 1); |
| if (nameAttribute != null && !nameAttribute.equalsIgnoreCase(last.getType())) |
| return null; |
| |
| // The group name is the string value of the final attribute in the DN |
| return last.getValue().toString(); |
| |
| } |
| |
| } |