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package org.openecomp.core.tools.util;
import com.google.common.io.ByteStreams;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
public class ZipUtils {
private static final Logger logger = LoggerFactory.getLogger(ZipUtils.class);
private ZipUtils() {
// prevent instantiation
}
public static void createZip(String zipFileName, Path dir) throws IOException {
File dirObj = dir.toFile();
Path zippedFile = Files.createFile(Paths.get(zipFileName));
try (
FileOutputStream fileOutputStream = new FileOutputStream(File.separator + zippedFile.toFile());
BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream);
ZipOutputStream out = new ZipOutputStream(bos)) {
File[] files = dirObj.listFiles();
for (File file : files) {
out.putNextEntry(new ZipEntry(file.getName()));
Files.copy(Paths.get(file.getPath()), out);
out.closeEntry();
}
Utils.printMessage(logger, "Zip file was created " + zipFileName);
}
}
public static void unzip(Path zipFile, Path outputFolder) throws IOException {
if (zipFile == null || outputFolder == null) {
return;
}
createDirectoryIfNotExists(outputFolder);
try (FileInputStream fileInputStream = new FileInputStream(zipFile.toFile());
ZipInputStream stream = new ZipInputStream(fileInputStream)) {
ZipEntry entry;
while ((entry = stream.getNextEntry()) != null) {
assertEntryNotVulnerable(entry);
String fileName = entry.getName();
File newFile = new File(outputFolder.toString() + File.separator + fileName);
if (entry.isDirectory()) {
createDirectoryIfNotExists(newFile.toPath());
} else {
persistFile(stream, newFile);
}
}
}
}
private static void persistFile(ZipInputStream stream, File newFile) throws IOException {
new File(newFile.getParent()).mkdirs();
try (FileOutputStream outputStream = new FileOutputStream(newFile)) {
ByteStreams.copy(stream, outputStream);
}
}
private static void createDirectoryIfNotExists(Path path) throws IOException {
if (!path.toFile().exists()) {
Files.createDirectories(path);
}
}
private static void assertEntryNotVulnerable(ZipEntry entry) throws ZipException {
if (entry.getName().contains("../")) {
throw new ZipException("Path traversal attempt discovered.");
}
}
}
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