/**
* 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.hadoop.fs.azure.security;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.azure.RemoteWasbAuthorizerImpl;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenIdentifier;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Iterator;
/**
* Security Utils class for WASB.
*/
public final class SecurityUtils {
private SecurityUtils() {
}
/**
* Utility method to get remote service URLs from the configuration.
* @param conf configuration object.
* @return remote service URL
* @throws UnknownHostException thrown when getting the default value.
*/
public static String getCredServiceUrls(Configuration conf)
throws UnknownHostException {
return conf.get(Constants.KEY_CRED_SERVICE_URL, String
.format("http://%s:%s",
InetAddress.getLocalHost().getCanonicalHostName(),
Constants.DEFAULT_CRED_SERVICE_PORT));
}
/**
* Utility method to get remote Authorization service URLs from the configuration.
* @param conf Configuration object.
* @return remote Authorization server URL
* @throws UnknownHostException thrown when getting the default value.
*/
public static String getRemoteAuthServiceUrls(Configuration conf)
throws UnknownHostException {
return conf.get(RemoteWasbAuthorizerImpl.KEY_REMOTE_AUTH_SERVICE_URL, String
.format("http://%s:%s",
InetAddress.getLocalHost().getCanonicalHostName(),
Constants.DEFAULT_CRED_SERVICE_PORT));
}
/**
* Utility method to get delegation token from the UGI credentials.
* @return delegation token
* @throws IOException thrown when getting the current user.
*/
public static String getDelegationTokenFromCredentials() throws IOException {
String delegationToken = null;
Iterator<Token<? extends TokenIdentifier>> tokenIterator = UserGroupInformation
.getCurrentUser().getCredentials().getAllTokens().iterator();
while (tokenIterator.hasNext()) {
Token<? extends TokenIdentifier> iteratedToken = tokenIterator.next();
if (iteratedToken.getKind()
.equals(WasbDelegationTokenIdentifier.TOKEN_KIND)) {
delegationToken = iteratedToken.encodeToUrlString();
}
}
return delegationToken;
}
}