de.zib.vold.security.GridMapUserDetailsService.java Source code

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Here is the source code for de.zib.vold.security.GridMapUserDetailsService.java

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package de.zib.vold.security;
/*
 * Copyright 2008-2011 Zuse Institute Berlin (ZIB)
 *
 *  Licensed 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.
 */

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author Maik Jorra
 * @email jorra@zib.de
 * @date 29.02.12  17:17
 * @brief The UserDetails provider for gndms.
 *
 * This is part of the service authentication module.
 *
 * It checks the role of an pre-authenticated user. Role-checking is done by look-ups in
 * grid-mapfiles. To possible files can be registered on for admins an one for standard user
 * depending on which file contains the requested DN the users Role is set.
 *
 * If a DN doesn't occur in on of the grid-mapfiles the user isn't allowed to access the service.
 */
public class GridMapUserDetailsService implements UserDetailsService {

    private String gridMapfileName;
    private String adminGridMapfileName;

    private final Map<String, String> admins;
    private final Map<String, String> users;

    public GridMapUserDetailsService() {
        admins = new ConcurrentHashMap<String, String>(1);
        users = new ConcurrentHashMap<String, String>(1);
    }

    @Override
    public UserDetails loadUserByUsername(final String dn) throws UsernameNotFoundException {

        List<GrantedAuthority> authorityList = new ArrayList<GrantedAuthority>(1);
        // search admin
        try {
            if (searchInGridMapfile(adminGridMapfileName, dn)) {
                //if( admins.containsKey( dn ) )
                authorityList.add(adminRole());
            } else if (searchInGridMapfile(gridMapfileName, dn))
                //else if ( users.containsKey( dn ) )
                authorityList.add(userRole());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        if (authorityList.size() == 0)
            throw new UsernameNotFoundException("DN not permitted: " + dn);

        VolDUserDetails userDetails = new VolDUserDetails();
        userDetails.setAuthorities(authorityList);
        userDetails.setDn(dn);

        return userDetails;
    }

    private SimpleGrantedAuthority userRole() {

        return new SimpleGrantedAuthority("ROLE_USER");
    }

    private SimpleGrantedAuthority adminRole() {

        return new SimpleGrantedAuthority("ROLE_ADMIN");
    }

    protected synchronized boolean searchInGridMapfile(final String fileName, final String dn) throws IOException {

        BufferedReader reader = new BufferedReader(new FileReader(fileName));

        try {
            String line;
            while ((line = reader.readLine()) != null) {

                if (line.startsWith("\"" + dn + "\""))
                    return true;

            }
        } finally {
            reader.close();
        }

        return false;
    }

    public String getGridMapfileName() {

        return gridMapfileName;
    }

    public void setGridMapfileName(final String gridMapfileName) {

        this.gridMapfileName = gridMapfileName;
    }

    public String getAdminGridMapfileName() {

        return adminGridMapfileName;
    }

    public void setAdminGridMapfileName(final String adminGridMapfileName) {

        this.adminGridMapfileName = adminGridMapfileName;
    }
}