code: /*
   * 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.skywalking.oap.log.analyzer.dsl;
  
  import org.apache.skywalking.apm.network.logging.v3.LogData;
  import org.apache.skywalking.oap.log.analyzer.provider.LogAnalyzerModuleConfig;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.config.ConfigService;
  import org.apache.skywalking.oap.server.core.source.SourceReceiver;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.module.ModuleProviderHolder;
  import org.apache.skywalking.oap.server.library.module.ModuleServiceHolder;
  import org.codehaus.groovy.control.MultipleCompilationErrorsException;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.MethodSource;
  import org.powermock.reflect.Whitebox;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.ArgumentMatchers.anyString;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  public class DSLSecurityTest {
      public static Collection<Object[]> data() {
          return Arrays.asList(
              new String[] {
                  "DDOS",
                  "" +
                      "filter {\n" +
                      "  System.exit(0)\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "DDOS",
                  "" +
                      "filter {\n" +
                      "  for (;;) {}\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "DDOS",
                  "" +
                      "filter {\n" +
                      "  while (true) {}\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "DDOS",
                  "" +
                      "filter {\n" +
                      "  do {} while (true)\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "Steal or delete files on server",
                  "" +
                      "filter {\n" +
                      "  Files.delete(\"/etc/pwd\");\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "Evaluate malicious codes in GroovyShell from inside DSL to get rid of outer DSL restriction",
                  "" +
                      "filter {\n" +
                      "  new GroovyShell().evaluate('malicious codes or URL')\n" +
                      "  sink {}\n" +
                      "}",
                  },
              new String[] {
                  "disallowed methods",
                  "filter {\n" +
                      "java.util.Collections.singleton(1)" +
                      "}",
                  }
          );
      }
  
      final ModuleManager manager = mock(ModuleManager.class);
  
      @BeforeEach
      public void setup() {
          Whitebox.setInternalState(manager, "isInPrepareStage", false);
          when(manager.find(anyString())).thenReturn(mock(ModuleProviderHolder.class));
          when(manager.find(CoreModule.NAME).provider()).thenReturn(mock(ModuleServiceHolder.class));
          when(manager.find(CoreModule.NAME).provider().getService(SourceReceiver.class))
              .thenReturn(mock(SourceReceiver.class));
          when(manager.find(CoreModule.NAME).provider().getService(ConfigService.class))
              .thenReturn(mock(ConfigService.class));
          when(manager.find(CoreModule.NAME)
                      .provider()
                      .getService(ConfigService.class)
                      .getSearchableLogsTags())
              .thenReturn("");
      }
  
      @ParameterizedTest(name = "{0}")
      @MethodSource("data")
      public void testSecurity(String name, String script) {
          assertThrows(MultipleCompilationErrorsException.class, () -> {
              final DSL dsl = DSL.of(manager, new LogAnalyzerModuleConfig(), script);
              Whitebox.setInternalState(
                      Whitebox.getInternalState(dsl, "filterSpec"), "sinkListenerFactories", Collections.emptyList()
              );
  
              dsl.bind(new Binding().log(LogData.newBuilder()));
              dsl.evaluate();
          });
      }
  }
  