/**
 * 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.hive.jdbc.authorization;

import static org.junit.Assert.fail;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;

import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.ql.security.SessionStateUserAuthenticator;
import org.apache.hadoop.hive.ql.security.authorization.plugin.sqlstd.SQLStdHiveAuthorizerFactory;
import org.apache.hive.jdbc.miniHS2.MiniHS2;
import org.junit.After;
import org.junit.Test;

/**
 * Test SQL standard authorization with jdbc/hiveserver2. Specifically udf blacklist behavior.
 * This test needs to start minihs2 with specific configuration, so it is in a different
 * test file from {@link TestJdbcWithSQLAuthorization}
 */
public class TestJdbcWithSQLAuthUDFBlacklist {
  private MiniHS2 miniHS2 = null;

  public void startHS2(HiveConf conf) throws Exception {
    Class.forName(MiniHS2.getJdbcDriverName());

    conf.setVar(ConfVars.HIVE_AUTHORIZATION_MANAGER, SQLStdHiveAuthorizerFactory.class.getName());
    conf.setVar(ConfVars.HIVE_AUTHENTICATOR_MANAGER, SessionStateUserAuthenticator.class.getName());
    conf.setBoolVar(ConfVars.HIVE_AUTHORIZATION_ENABLED, true);
    conf.setBoolVar(ConfVars.HIVE_SUPPORT_CONCURRENCY, false);
    conf.setBoolVar(ConfVars.HIVE_SERVER2_ENABLE_DOAS, false);

    miniHS2 = new MiniHS2(conf);
    miniHS2.start(new HashMap<String, String>());
  }

  @After
  public void shutDownHS2() throws Exception {
    if (miniHS2.isStarted()) {
      miniHS2.stop();
    }
  }

  @Test
  public void testBlackListedUdfUsage() throws Exception {
    HiveConf conf = new HiveConf();
    conf.setVar(ConfVars.HIVE_SERVER2_BUILTIN_UDF_BLACKLIST, "sqrt");
    startHS2(conf);

    // create tables as user1
    Connection hs2Conn = DriverManager.getConnection(miniHS2.getJdbcURL(), "user1", "bar");

    Statement stmt = hs2Conn.createStatement();
    String tableName1 = "test_jdbc_sql_auth_udf_blacklist";
    stmt.execute("create table " + tableName1 + "(i int) ");

    verifyUDFNotAllowed(stmt, tableName1, "sqrt(1)", "sqrt");

    // verify udf reflect is allowed (no exception will be thrown)
    stmt.execute("SELECT reflect('java.lang.String', 'valueOf', 1) from " + tableName1);
    stmt.close();
    hs2Conn.close();
  }

  private void verifyUDFNotAllowed(Statement stmt, String tableName, String udfcall, String udfname) {
    try {
      stmt.execute("SELECT " + udfcall + " from " + tableName);
      fail("Disallowed udf usage should have resulted in error");
    } catch (SQLException e) {
      checkAssertContains("UDF " + udfname + " is not allowed", e.getMessage());
    }
  }

  private void checkAssertContains(String expectedSubString, String message) {
    if (message.contains(expectedSubString)) {
      return;
    }
    fail("Message [" + message + "] does not contain substring [" + expectedSubString + "]");
  }

}