001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.fcrepo.auth.common; 019 020import org.fcrepo.kernel.api.exception.RepositoryConfigurationException; 021 022import javax.jcr.Credentials; 023import java.security.Principal; 024import java.util.Set; 025 026/** 027 * An example principal provider that extracts principals from request headers. 028 * 029 * @author awoods 030 * @since 2015-10-31 031 */ 032public class DelegateHeaderPrincipalProvider extends HttpHeaderPrincipalProvider { 033 034 private static final String SEP = "no-separator"; 035 protected static final String DELEGATE_HEADER = "On-Behalf-Of"; 036 037 /** 038 * Default Constructor 039 */ 040 public DelegateHeaderPrincipalProvider() { 041 super(); 042 setHeaderName(DELEGATE_HEADER); 043 setSeparator(SEP); 044 } 045 046 /** 047 * @param credentials from which the principal header is extracted 048 * @return null if no delegate found, and the delegate if one found 049 * @throws RepositoryConfigurationException if more than one delegate found 050 */ 051 public Principal getDelegate(final Credentials credentials) { 052 final Set<Principal> principals = getPrincipals(credentials); 053 // No delegate 054 if (principals.size() == 0) { 055 return null; 056 } 057 058 // One delegate 059 if (principals.size() == 1) { 060 return principals.iterator().next(); 061 } 062 063 throw new RepositoryConfigurationException("Too many delegates! " + principals); 064 } 065 066}