org.apache.hadoop.io.crypto.tool.kerberos.SpnegoRestCli.java Source code

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Here is the source code for org.apache.hadoop.io.crypto.tool.kerberos.SpnegoRestCli.java

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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.hadoop.io.crypto.tool.kerberos;

import java.net.URL;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import java.util.HashMap;
import java.util.Map;

import javax.security.auth.Subject;
import javax.security.auth.login.AppConfigurationEntry;
import javax.security.auth.login.Configuration;
import javax.security.auth.login.LoginContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.crypto.bee.RestClient;

public class SpnegoRestCli {
    private static final Log LOG = LogFactory.getLog(SpnegoRestCli.class);

    private static class KerberosConfiguration extends Configuration {

        private static final String OS_LOGIN_MODULE_NAME;
        private static final boolean windows = System.getProperty("os.name").startsWith("Windows");

        static {
            if (windows) {
                OS_LOGIN_MODULE_NAME = "com.sun.security.auth.module.NTLoginModule";
            } else {
                OS_LOGIN_MODULE_NAME = "com.sun.security.auth.module.UnixLoginModule";
            }
        }

        private static final AppConfigurationEntry OS_SPECIFIC_LOGIN = new AppConfigurationEntry(
                OS_LOGIN_MODULE_NAME, AppConfigurationEntry.LoginModuleControlFlag.REQUIRED,
                new HashMap<String, String>());

        private static final Map<String, String> USER_KERBEROS_OPTIONS = new HashMap<String, String>();

        static {
            USER_KERBEROS_OPTIONS.put("doNotPrompt", "true");
            USER_KERBEROS_OPTIONS.put("useTicketCache", "true");
            USER_KERBEROS_OPTIONS.put("renewTGT", "true");
            String ticketCache = System.getenv("KRB5CCNAME");
            if (ticketCache != null) {
                USER_KERBEROS_OPTIONS.put("ticketCache", ticketCache);
            }
        }

        private static final AppConfigurationEntry USER_KERBEROS_LOGIN = new AppConfigurationEntry(
                KerberosUtil.getKrb5LoginModuleName(), AppConfigurationEntry.LoginModuleControlFlag.OPTIONAL,
                USER_KERBEROS_OPTIONS);

        private static final AppConfigurationEntry[] USER_KERBEROS_CONF =
                // new AppConfigurationEntry[] { OS_SPECIFIC_LOGIN, USER_KERBEROS_LOGIN };
                new AppConfigurationEntry[] { USER_KERBEROS_LOGIN };

        @Override
        public AppConfigurationEntry[] getAppConfigurationEntry(String appName) {
            return USER_KERBEROS_CONF;
        }
    }

    private URL url = null;
    StringBuffer sb = new StringBuffer();

    public SpnegoRestCli(URL url) {
        this.url = url;
    }

    public StringBuffer getResult() throws Exception {
        AccessControlContext context = AccessController.getContext();
        Subject subject = Subject.getSubject(context);
        if (subject == null) {
            subject = new Subject();
            LoginContext login = new LoginContext("", subject, null, new KerberosConfiguration());
            login.login();
        }
        Subject.doAs(subject, new PrivilegedExceptionAction<Void>() {
            @Override
            public Void run() throws Exception {
                sb = new RestClient(url).getResult();
                return null;
            }
        });
        return sb;
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        String strUrl = "";
        if (args.length >= 1) {
            strUrl = args[0];
        } else {
            strUrl = "http://web.bdp:8080/test/api/echo/tttt";
        }

        try {
            StringBuffer sb = new SpnegoRestCli(new URL(strUrl)).getResult();

            String result = sb.toString();
            System.out.println("Content of result:");
            System.out.println("*** BEGIN ***");
            System.out.println(result);
            System.out.println("*** END ***");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}