| /* |
| * ==================================================================== |
| * 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.xssf.streaming; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.charset.Charset; |
| import java.security.GeneralSecurityException; |
| import java.util.List; |
| |
| import org.apache.poi.openxml4j.exceptions.InvalidFormatException; |
| import org.apache.poi.openxml4j.opc.OPCPackage; |
| import org.apache.poi.openxml4j.util.ZipEntrySource; |
| import org.apache.poi.poifs.crypt.temp.AesZipFileZipEntrySource; |
| import org.apache.poi.poifs.crypt.temp.EncryptedTempData; |
| import org.apache.poi.poifs.crypt.temp.SXSSFWorkbookWithCustomZipEntrySource; |
| import org.apache.poi.util.IOUtils; |
| import org.apache.poi.xssf.usermodel.XSSFCell; |
| import org.apache.poi.xssf.usermodel.XSSFRow; |
| import org.apache.poi.xssf.usermodel.XSSFSheet; |
| import org.apache.poi.xssf.usermodel.XSSFWorkbook; |
| import org.junit.Test; |
| |
| /** |
| * This class tests that an SXSSFWorkbook can be written and read where all temporary disk I/O |
| * is encrypted, but the final saved workbook is not encrypted |
| */ |
| public final class TestSXSSFWorkbookWithCustomZipEntrySource { |
| |
| final String sheetName = "TestSheet1"; |
| final String cellValue = "customZipEntrySource"; |
| |
| // write an unencrypted workbook to disk, but any temporary files are encrypted |
| @Test |
| public void customZipEntrySource() throws IOException { |
| SXSSFWorkbookWithCustomZipEntrySource workbook = new SXSSFWorkbookWithCustomZipEntrySource(); |
| SXSSFSheet sheet1 = workbook.createSheet(sheetName); |
| SXSSFRow row1 = sheet1.createRow(1); |
| SXSSFCell cell1 = row1.createCell(1); |
| cell1.setCellValue(cellValue); |
| ByteArrayOutputStream os = new ByteArrayOutputStream(8192); |
| workbook.write(os); |
| workbook.close(); |
| workbook.dispose(); |
| XSSFWorkbook xwb = new XSSFWorkbook(new ByteArrayInputStream(os.toByteArray())); |
| XSSFSheet xs1 = xwb.getSheetAt(0); |
| assertEquals(sheetName, xs1.getSheetName()); |
| XSSFRow xr1 = xs1.getRow(1); |
| XSSFCell xc1 = xr1.getCell(1); |
| assertEquals(cellValue, xc1.getStringCellValue()); |
| xwb.close(); |
| } |
| |
| // write an encrypted workbook to disk, and encrypt any temporary files as well |
| @Test |
| public void customZipEntrySourceForWriteAndRead() throws IOException, GeneralSecurityException, InvalidFormatException { |
| SXSSFWorkbookWithCustomZipEntrySource workbook = new SXSSFWorkbookWithCustomZipEntrySource(); |
| SXSSFSheet sheet1 = workbook.createSheet(sheetName); |
| SXSSFRow row1 = sheet1.createRow(1); |
| SXSSFCell cell1 = row1.createCell(1); |
| cell1.setCellValue(cellValue); |
| EncryptedTempData tempData = new EncryptedTempData(); |
| workbook.write(tempData.getOutputStream()); |
| workbook.close(); |
| workbook.dispose(); |
| ZipEntrySource zipEntrySource = AesZipFileZipEntrySource.createZipEntrySource(tempData.getInputStream()); |
| tempData.dispose(); |
| OPCPackage opc = OPCPackage.open(zipEntrySource); |
| XSSFWorkbook xwb = new XSSFWorkbook(opc); |
| zipEntrySource.close(); |
| XSSFSheet xs1 = xwb.getSheetAt(0); |
| assertEquals(sheetName, xs1.getSheetName()); |
| XSSFRow xr1 = xs1.getRow(1); |
| XSSFCell xc1 = xr1.getCell(1); |
| assertEquals(cellValue, xc1.getStringCellValue()); |
| xwb.close(); |
| opc.close(); |
| } |
| |
| // Java 7 and above: |
| // import static java.nio.charset.StandardCharsets.UTF_8; |
| // Java 6 and below: |
| private static final Charset UTF_8 = Charset.forName("UTF-8"); |
| |
| @Test |
| public void validateTempFilesAreEncrypted() throws IOException { |
| TempFileRecordingSXSSFWorkbookWithCustomZipEntrySource workbook = new TempFileRecordingSXSSFWorkbookWithCustomZipEntrySource(); |
| SXSSFSheet sheet1 = workbook.createSheet(sheetName); |
| SXSSFRow row1 = sheet1.createRow(1); |
| SXSSFCell cell1 = row1.createCell(1); |
| cell1.setCellValue(cellValue); |
| ByteArrayOutputStream os = new ByteArrayOutputStream(8192); |
| workbook.write(os); |
| workbook.close(); |
| List<File> tempFiles = workbook.getTempFiles(); |
| assertEquals(1, tempFiles.size()); |
| File tempFile = tempFiles.get(0); |
| assertTrue("tempFile exists?", tempFile.exists()); |
| InputStream stream = new FileInputStream(tempFile); |
| try { |
| byte[] data = IOUtils.toByteArray(stream); |
| String text = new String(data, UTF_8); |
| assertFalse(text.contains(sheetName)); |
| assertFalse(text.contains(cellValue)); |
| } finally { |
| stream.close(); |
| } |
| workbook.dispose(); |
| assertFalse("tempFile deleted after dispose?", tempFile.exists()); |
| } |
| } |