What Is poi-5.2.3.jar?

What Is poi-5.2.3.jar?

✍: FYIcenter.com

poi-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-5.2.3.jar supports Apache POI components that read and write Microsoft's OLE 2 Compound document format, which is used in early versions of Microsoft Office tools like Word 97, Excel 97, PowerPoint 97, etc.

poi-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-5.2.3.jar
Target JDK version: 9

File name: poi.jar, poi-5.2.3.jar
File size: 2964641 bytes
Release date: 09-09-2022
Download: Apache POI Website

Here are Java Source Code files for poi-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


   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.poifs.crypt;

import org.apache.poi.EncryptedDocumentException;

public enum CipherAlgorithm {
    // key size for rc4: 0x00000028 - 0x00000080 (inclusive) with 8-bit increments
    // no block size, because its a streaming cipher
    rc4(CipherProvider.rc4,    "RC4", 0x6801, 0x40, new int[]{0x28,0x30,0x38,0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,0x80}, -1, 20, "RC4", false),
    // aes has always a block size of 128 - only its keysize may vary
    aes128(CipherProvider.aes, "AES", 0x660E, 128, new int[]{128}, 16, 32, "AES", false),
    aes192(CipherProvider.aes, "AES", 0x660F, 192, new int[]{192}, 16, 32, "AES", false),
    aes256(CipherProvider.aes, "AES", 0x6610, 256, new int[]{256}, 16, 32, "AES", false),
    rc2(null, "RC2", -1, 0x80, new int[]{0x28,0x30,0x38,0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,0x80}, 8, 20, "RC2", false),
    des(null, "DES", -1, 64, new int[]{64}, 8/*for 56-bit*/, 32, "DES", false),
    // desx is not supported. Not sure, if it can be simulated by des3 somehow
    des3(null, "DESede", -1, 192, new int[]{192}, 8, 32, "3DES", false),
    // need bouncycastle provider for this one ...
    des3_112(null, "DESede", -1, 128, new int[]{128}, 8, 32, "3DES_112", true),
    // only for digital signatures
    rsa(null, "RSA", -1, 1024, new int[]{1024, 2048, 3072, 4096}, -1, -1, "", false);

    public final CipherProvider provider;
    public final String jceId;
    public final int ecmaId;
    public final int defaultKeySize;
    public final int[] allowedKeySize;
    public final int blockSize;
    public final int encryptedVerifierHashLength;
    public final String xmlId;
    public final boolean needsBouncyCastle;

    CipherAlgorithm(CipherProvider provider, String jceId, int ecmaId, int defaultKeySize, int[] allowedKeySize, int blockSize, int encryptedVerifierHashLength, String xmlId, boolean needsBouncyCastle) {
        this.provider = provider;
        this.jceId = jceId;
        this.ecmaId = ecmaId;
        this.defaultKeySize = defaultKeySize;
        this.allowedKeySize = allowedKeySize.clone();
        this.blockSize = blockSize;
        this.encryptedVerifierHashLength = encryptedVerifierHashLength;
        this.xmlId = xmlId;
        this.needsBouncyCastle = needsBouncyCastle;

    public static CipherAlgorithm fromEcmaId(int ecmaId) {
        for (CipherAlgorithm ca : CipherAlgorithm.values()) {
            if (ca.ecmaId == ecmaId) return ca;
        throw new EncryptedDocumentException("cipher algorithm " + ecmaId + " not found");

    public static CipherAlgorithm fromXmlId(String xmlId, int keySize) {
        for (CipherAlgorithm ca : CipherAlgorithm.values()) {
            if (!ca.xmlId.equals(xmlId)) continue;
            for (int ks : ca.allowedKeySize) {
                if (ks == keySize) return ca;
        throw new EncryptedDocumentException("cipher algorithm " + xmlId + "/" + keySize + " not found");


Or download all of them as a single archive file:

File name: poi-5.2.3-src.zip
File size: 2479830 bytes
Release date: 2022-09-09


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