What Is poi-ooxml-5.2.3.jar?

What Is poi-ooxml-5.2.3.jar?

✍: FYIcenter.com

poi-ooxml-5.2.3.jar is one of the JAR files for Apache POI 5.2.3, which provides an API for Microsoft document files of Word, Excel, PowerPoint, and Visio.

poi-ooxml-5.2.3.jar supports Apache POI components that read and write Microsoft's Open Office XML document format, which is used in recent versions of Microsoft Office tools like Word 2007, Excel 2007, PowerPoint 2007, etc.

poi-ooxml-5.2.3.jar is distributed as part of the poi-bin-5.2.3-20220909.zip download file.

JAR File Size and Download Location:

JAR name: poi-ooxml-5.2.3.jar
Target JDK version: 9

File name: poi-ooxml.jar, poi-ooxml-5.2.3.jar
File size: 2010497 bytes
Release date: 09-09-2022
Download: Apache POI Website

Here are Java Source Code files for poi-ooxml-5.2.3.jar:


 *  ====================================================================
 *    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.poifs.crypt.temp;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.apache.commons.compress.archivers.zip.ZipFile;
import org.apache.commons.io.output.CloseShieldOutputStream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.poi.openxml4j.util.ZipEntrySource;
import org.apache.poi.poifs.crypt.ChainingMode;
import org.apache.poi.poifs.crypt.CipherAlgorithm;
import org.apache.poi.poifs.crypt.CryptoFunctions;
import org.apache.poi.util.Beta;
import org.apache.poi.util.IOUtils;
import org.apache.poi.util.RandomSingleton;
import org.apache.poi.util.TempFile;

 * An example {@code ZipEntrySource} that has encrypted temp files to ensure that
 * sensitive data is not stored in raw format on disk.
public final class AesZipFileZipEntrySource implements ZipEntrySource {
    private static final Logger LOG = LogManager.getLogger(AesZipFileZipEntrySource.class);

    private static final String PADDING = "PKCS5Padding";

    private final File tmpFile;
    private final ZipFile zipFile;
    private final Cipher ci;
    private boolean closed;

    private AesZipFileZipEntrySource(File tmpFile, Cipher ci) throws IOException {
        this.tmpFile = tmpFile;
        this.zipFile = new ZipFile(tmpFile);
        this.ci = ci;
        this.closed = false;

     * Note: the file sizes are rounded up to the next cipher block size,
     * so don't rely on file sizes of these custom encrypted zip file entries!
    public Enumeration<? extends ZipArchiveEntry> getEntries() {
        return zipFile.getEntries();

    public ZipArchiveEntry getEntry(String path) {
        return zipFile.getEntry(path);

    public InputStream getInputStream(ZipArchiveEntry entry) throws IOException {
        InputStream is = zipFile.getInputStream(entry);
        return new CipherInputStream(is, ci);

    public void close() throws IOException {
        if(!closed) {
            if (!tmpFile.delete()) {
                LOG.atWarn().log("{} can't be removed (or was already removed).", tmpFile.getAbsolutePath());
        closed = true;

    public boolean isClosed() {
        return closed;

    public static AesZipFileZipEntrySource createZipEntrySource(InputStream is) throws IOException {
        try {
            // generate session key
            byte[] ivBytes = new byte[16], keyBytes = new byte[16];
            final File tmpFile = TempFile.createTempFile("protectedXlsx", ".zip");
            try {
                copyToFile(is, tmpFile, keyBytes, ivBytes);
                return fileToSource(tmpFile, keyBytes, ivBytes);
            } catch (IOException|RuntimeException e) {
                if (!tmpFile.delete()) {
                    LOG.atInfo().log("Temp file was not deleted, may already have been deleted by another method.");
                throw e;
        } finally {

    private static void copyToFile(InputStream is, File tmpFile, byte[] keyBytes, byte[] ivBytes) throws IOException {
        SecretKeySpec skeySpec = new SecretKeySpec(keyBytes, CipherAlgorithm.aes128.jceId);
        Cipher ciEnc = CryptoFunctions.getCipher(skeySpec, CipherAlgorithm.aes128, ChainingMode.cbc, ivBytes, Cipher.ENCRYPT_MODE, PADDING);

        try (ZipArchiveInputStream zis = new ZipArchiveInputStream(is);
            FileOutputStream fos = new FileOutputStream(tmpFile);
            ZipArchiveOutputStream zos = new ZipArchiveOutputStream(fos)) {

            ZipArchiveEntry ze;
            while ((ze = zis.getNextZipEntry()) != null) {
                // the cipher output stream pads the data, therefore we can't reuse the ZipEntry with set sizes
                // as those will be validated upon close()
                ZipArchiveEntry zeNew = new ZipArchiveEntry(ze.getName());
                // zeNew.setMethod(ze.getMethod());

                // don't close underlying ZipOutputStream
                try (CipherOutputStream cos = new CipherOutputStream(CloseShieldOutputStream.wrap(zos), ciEnc)) {
                    IOUtils.copy(zis, cos);

    private static AesZipFileZipEntrySource fileToSource(File tmpFile, byte[] keyBytes, byte[] ivBytes) throws IOException {
        SecretKeySpec skeySpec = new SecretKeySpec(keyBytes, CipherAlgorithm.aes128.jceId);
        Cipher ciDec = CryptoFunctions.getCipher(skeySpec, CipherAlgorithm.aes128, ChainingMode.cbc, ivBytes, Cipher.DECRYPT_MODE, PADDING);
        return new AesZipFileZipEntrySource(tmpFile, ciDec);



Or download all of them as a single archive file:

File name: poi-ooxml-5.2.3-src.zip
File size: 1396572 bytes
Release date: 2022-09-09


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