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/*
* 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.atlas.web.security;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.security.UserGroupInformation;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
public abstract class AtlasAbstractAuthenticationProvider implements
AuthenticationProvider {
@Override
public boolean supports(Class<?> authentication) {
return UsernamePasswordAuthenticationToken.class
.isAssignableFrom(authentication);
}
/**
*
* @param authentication
* @return
*/
public Authentication getAuthenticationWithGrantedAuthority(
Authentication authentication) {
UsernamePasswordAuthenticationToken result = null;
if (authentication != null && authentication.isAuthenticated()) {
final List<GrantedAuthority> grantedAuths = getAuthorities(authentication
.getName().toString());
final UserDetails userDetails = new User(authentication.getName()
.toString(), authentication.getCredentials().toString(),
grantedAuths);
result = new UsernamePasswordAuthenticationToken(userDetails,
authentication.getCredentials(), grantedAuths);
result.setDetails(authentication.getDetails());
return result;
}
return authentication;
}
/**
* This method will be modified when actual roles are introduced.
*
*/
protected List<GrantedAuthority> getAuthorities(String username) {
final List<GrantedAuthority> grantedAuths = new ArrayList<GrantedAuthority>();
grantedAuths.add(new SimpleGrantedAuthority("DATA_SCIENTIST"));
return grantedAuths;
}
public Authentication getAuthenticationWithGrantedAuthorityFromUGI(
Authentication authentication) {
UsernamePasswordAuthenticationToken result = null;
if (authentication != null && authentication.isAuthenticated()) {
List<GrantedAuthority> grantedAuthsUGI = getAuthoritiesFromUGI(authentication
.getName().toString());
final UserDetails userDetails = new User(authentication.getName()
.toString(), authentication.getCredentials().toString(),
grantedAuthsUGI);
result = new UsernamePasswordAuthenticationToken(userDetails,
authentication.getCredentials(), grantedAuthsUGI);
result.setDetails(authentication.getDetails());
return result;
}
return authentication;
}
public List<GrantedAuthority> getAuthoritiesFromUGI(String userName) {
List<GrantedAuthority> grantedAuths = new ArrayList<GrantedAuthority>();
UserGroupInformation ugi = UserGroupInformation.createRemoteUser(userName);
if (ugi != null) {
String[] userGroups = ugi.getGroupNames();
if (userGroups != null) {
for (String group : userGroups) {
grantedAuths.add(new SimpleGrantedAuthority(group));
}
}
}
return grantedAuths;
}
}