com.sap.psr.vulas.java.AarAnalyzer Maven / Gradle / Ivy

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/**
 * This file is part of Eclipse Steady.
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved.
 */
package com.sap.psr.vulas.java;

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.jar.JarFile;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.sap.psr.vulas.FileAnalysisException;
import com.sap.psr.vulas.shared.util.FileUtil;

/**
 * AarAnalyzer class.
 *
 */
public class AarAnalyzer extends JarAnalyzer {

	private static final Log log = LogFactory.getLog(AarAnalyzer.class);
	
	private static final String CLASSES_JAR = "classes.jar";
	
	private JarFile aar;
	private JarWriter aarWriter;
	
	private Path tmpDir = null; // To where the AAR is extracted
	
	/** {@inheritDoc} */
	@Override
	public String[] getSupportedFileExtensions() { return new String[] { "aar" }; }
	
	/** {@inheritDoc} */
	@Override
	public void analyze(final File _file) throws FileAnalysisException {
		try {
			this.aar = new JarFile(_file, false, java.util.zip.ZipFile.OPEN_READ);
			this.aarWriter = new JarWriter(_file.toPath());
			this.url = _file.getAbsolutePath().toString();
			
			try {
				this.tmpDir = java.nio.file.Files.createTempDirectory("aar_analysis_");
			} catch (IOException e) {
				throw new IllegalStateException("Unable to create temp directory", e);
			}
		
			this.aarWriter.extract(this.tmpDir);
			
			// TODO: What if no classes.jar
			final File classes_jar = this.tmpDir.resolve(CLASSES_JAR).toFile();
			if(classes_jar!=null && FileUtil.isAccessibleFile(classes_jar.toPath())) {
				JarAnalyzer.insertClasspath(classes_jar.toPath().toAbsolutePath().toString());
				this.jar = new JarFile(classes_jar, false, java.util.zip.ZipFile.OPEN_READ);
				this.jarWriter = new JarWriter(classes_jar.toPath());
			}
			else {
				log.warn("No " + CLASSES_JAR + " found in [" + _file.toPath().toAbsolutePath() + "]");
			}
		} catch (IllegalStateException e) {
			log.error("IllegalStateException when analyzing file [" + _file + "]: " + e.getMessage());
			throw new FileAnalysisException("Error when analyzing file [" + _file + "]: " + e.getMessage(), e);
		} catch (IOException e) {
			log.error("IOException when analyzing file [" + _file + "]: " + e.getMessage());
			throw new FileAnalysisException("Error when analyzing file [" + _file + "]: " + e.getMessage(), e);
		} catch (Exception e) {
			log.error("Exception when analyzing file [" + _file + "]: " + e.getMessage());
			throw new FileAnalysisException("Error when analyzing file [" + _file + "]: " + e.getMessage(), e);
		}
	}
	
	/**
	 * {@inheritDoc}
	 *
	 * Returns the SHA1 digest of the AAR by computing it on the fly.
	 */
	@Override
	public synchronized String getSHA1() { return this.aarWriter.getSHA1(); }
	
	/**
	 * getFileName.
	 *
	 * @return a {@link java.lang.String} object.
	 */
	public String getFileName() {
		return this.aarWriter.getOriginalJarFileName().toString();// + "!" + CLASSES_JAR;
	}
}