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
Dependency:
   poi.jar
   xmlbeans.jar
   ooxml-schemas.jar
   commons-collections.jar
   junit.jar   

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:

org/apache/poi/poifs/crypt/dsig/DigestOutputStream.java

/* ====================================================================
   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.dsig;

import java.io.IOException;
import java.io.OutputStream;
import java.security.GeneralSecurityException;
import java.security.MessageDigest;
import java.security.PrivateKey;

import javax.crypto.Cipher;

import org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream;
import org.apache.poi.EncryptedDocumentException;
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.poifs.crypt.HashAlgorithm;
import org.ietf.jgss.GSSException;
import org.ietf.jgss.Oid;

/* package */ class DigestOutputStream extends OutputStream {
    final HashAlgorithm algo;
    final PrivateKey key;
    private MessageDigest md;

    DigestOutputStream(final HashAlgorithm algo, final PrivateKey key) {
        this.algo = algo;
        this.key = key;
    }

    public void init() throws GeneralSecurityException {
        if (isMSCapi(key)) {
            // SunMSCAPI can't be used to sign the calculated digest
            throw new EncryptedDocumentException(
                "Windows keystore entries can't be signed with the "+algo+" hash. Please "+
                "use one digest algorithm of sha1 / sha256 / sha384 / sha512.");
        }
        md = CryptoFunctions.getMessageDigest(algo);
    }

    @Override
    public void write(final int b) throws IOException {
        md.update((byte)b);
    }

    @Override
    public void write(final byte[] data, final int off, final int len) throws IOException {
        md.update(data, off, len);
    }

    public byte[] sign() throws IOException, GeneralSecurityException {
        try (UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream()) {
            bos.write(getHashMagic());
            bos.write(md.digest());

            final Cipher cipher = CryptoFunctions.getCipher(key, CipherAlgorithm.rsa
                , ChainingMode.ecb, null, Cipher.ENCRYPT_MODE, "PKCS1Padding");
            return cipher.doFinal(bos.toByteArray());
        }
    }

    static boolean isMSCapi(final PrivateKey key) {
        return key != null && key.getClass().getName().contains("mscapi");
    }


    /**
     * Each digest method has its own ASN1 header
     *
     * @return the ASN1 header bytes for the signatureValue / digestInfo
     *
     * @see <a href="https://tools.ietf.org/html/rfc2313#section-10.1.2">Data encoding</a>
     */
    byte[] getHashMagic() {
        // in an earlier release the hashMagic (aka DigestAlgorithmIdentifier) contained only
        // an object identifier, but to conform with the header generated by the
        // javax-signature API, the empty <associated parameters> are also included
        try (UnsynchronizedByteArrayOutputStream bos = new UnsynchronizedByteArrayOutputStream()) {
            final byte[] oidBytes = new Oid(algo.rsaOid).getDER();

            bos.write(0x30);
            bos.write(algo.hashSize+oidBytes.length+6);
            bos.write(0x30);
            bos.write(oidBytes.length+2);
            bos.write(oidBytes);
            bos.write(new byte[] {5,0,4});
            bos.write(algo.hashSize);

            return bos.toByteArray();
        } catch (GSSException|IOException e) {
            throw new IllegalStateException(e);
        }
    }
}

org/apache/poi/poifs/crypt/dsig/DigestOutputStream.java

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
Download 

 

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