io.hops.merge.SecurityUtil2.java Source code

Introduction

Here is the source code for io.hops.merge.SecurityUtil2.java

Source

/*
 * Copyright (C) 2015 hops.io.
 *
 * 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.
 */
package io.hops.merge;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authentication.client.AuthenticatedURL;
import org.apache.hadoop.security.authentication.client.AuthenticationException;
import org.apache.hadoop.security.ssl.SSLFactory;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class SecurityUtil2 extends SecurityUtil {

    private static SSLFactory sslFactory;

    static {
        Configuration conf = new Configuration();
        if (HttpConfig2.isSecure()) {
            sslFactory = new SSLFactory(SSLFactory.Mode.CLIENT, conf);
            try {
                sslFactory.init();
            } catch (Exception ex) {
                throw new RuntimeException(ex);
            }
        }
    }

    /**
     * Open a (if need be) secure connection to a URL in a secure environment
     * that is using SPNEGO to authenticate its URLs. All Namenode and Secondary
     * Namenode URLs that are protected via SPNEGO should be accessed via this
     * method.
     *
     * @param url
     *     to authenticate via SPNEGO.
     * @return A connection that has been authenticated via SPNEGO
     * @throws IOException
     *     If unable to authenticate via SPNEGO
     */
    public static URLConnection openSecureHttpConnection(URL url) throws IOException {
        if (!HttpConfig2.isSecure() && !UserGroupInformation.isSecurityEnabled()) {
            return url.openConnection();
        }

        AuthenticatedURL.Token token = new AuthenticatedURL.Token();
        try {
            return new AuthenticatedURL(null, sslFactory).openConnection(url, token);
        } catch (AuthenticationException e) {
            throw new IOException("Exception trying to open authenticated connection to " + url, e);
        }
    }
}