| /* |
| * ==================================================================== |
| * 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.poi.examples.xssf.usermodel; |
| |
| import java.io.FileInputStream; |
| import java.io.InputStream; |
| |
| import org.apache.poi.examples.util.TempFileUtils; |
| import org.apache.poi.openxml4j.opc.OPCPackage; |
| import org.apache.poi.poifs.crypt.Decryptor; |
| import org.apache.poi.poifs.crypt.EncryptionInfo; |
| import org.apache.poi.poifs.crypt.temp.AesZipFileZipEntrySource; |
| import org.apache.poi.poifs.filesystem.POIFSFileSystem; |
| import org.apache.poi.xssf.usermodel.XSSFWorkbook; |
| |
| /** |
| * An example that loads a password protected workbook and counts the sheets. |
| * <p><ul> |
| * <li>The example demonstrates that all temp files are removed. |
| * <li><code>AesZipFileZipEntrySource</code> is used to ensure that temp files are encrypted. |
| * </ul><p> |
| */ |
| @SuppressWarnings({"java:S106","java:S4823","java:S1192"}) |
| public final class LoadPasswordProtectedXlsx { |
| |
| private LoadPasswordProtectedXlsx() {} |
| |
| public interface EncryptionHandler { |
| void handle(final InputStream inputStream) throws Exception; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| execute(args, LoadPasswordProtectedXlsx::printSheetCount); |
| } |
| |
| public static void execute(String[] args, EncryptionHandler handler) throws Exception { |
| if(args.length != 2) { |
| throw new IllegalArgumentException("Expected 2 params: filename and password"); |
| } |
| TempFileUtils.checkTempFiles(); |
| String filename = args[0]; |
| String password = args[1]; |
| try (FileInputStream fis = new FileInputStream(filename); |
| POIFSFileSystem fs = new POIFSFileSystem(fis)) { |
| EncryptionInfo info = new EncryptionInfo(fs); |
| Decryptor d = Decryptor.getInstance(info); |
| if (!d.verifyPassword(password)) { |
| throw new RuntimeException("incorrect password"); |
| } |
| try (InputStream unencryptedStream = d.getDataStream(fs)) { |
| handler.handle(unencryptedStream); |
| } |
| } |
| TempFileUtils.checkTempFiles(); |
| } |
| |
| |
| private static void printSheetCount(final InputStream inputStream) throws Exception { |
| try (AesZipFileZipEntrySource source = AesZipFileZipEntrySource.createZipEntrySource(inputStream); |
| OPCPackage pkg = OPCPackage.open(source); |
| XSSFWorkbook workbook = new XSSFWorkbook(pkg)) { |
| System.out.println("sheet count: " + workbook.getNumberOfSheets()); |
| } |
| } |
| |
| } |