What Is poi-scratchpad-5.2.3.jar?

poi-scratchpad-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-scratchpad-5.2.3.jar provides support for older versions of Microsoft document files like Word 97, Excel 97, PowerPoint 97, etc.

poi-scratchpad-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-scratchpad-5.2.3.jar
Target JDK version: 9
Dependency: 
   poi.jar

File name: poi-scratchpad.jar, poi-scratchpad-5.2.3.jar
File size: 1897121 bytes
Release date: 09-09-2022
Download: Apache POI Website

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

⏎ org/apache/poi/hslf/record/DocumentEncryptionAtom.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.hslf.record;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Map;
import java.util.function.Supplier;

import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.poifs.crypt.CipherAlgorithm;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.crypt.EncryptionMode;
import org.apache.poi.poifs.crypt.HashAlgorithm;
import org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIEncryptionHeader;
import org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIEncryptionVerifier;
import org.apache.poi.util.GenericRecordUtil;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.LittleEndianByteArrayOutputStream;
import org.apache.poi.util.LittleEndianInputStream;

/**
 * A Document Encryption Atom (type 12052). Holds information
 *  on the Encryption of a Document
 */
public final class DocumentEncryptionAtom extends PositionDependentRecordAtom {
    private static final long _type = RecordTypes.DocumentEncryptionAtom.typeID;
    private final byte[] _header;
    private EncryptionInfo ei;

    /**
     * For the Document Encryption Atom
     */
    protected DocumentEncryptionAtom(byte[] source, int start, int len) {
        // Get the header
        _header = Arrays.copyOfRange(source,start,start+8);

        ByteArrayInputStream bis = new ByteArrayInputStream(source, start+8, len-8);
        try (LittleEndianInputStream leis = new LittleEndianInputStream(bis)) {
            ei = new EncryptionInfo(leis, EncryptionMode.cryptoAPI);
        } catch (IOException e) {
            throw new EncryptedDocumentException(e);
        }
    }

    public DocumentEncryptionAtom() {
        _header = new byte[8];
        LittleEndian.putShort(_header, 0, (short)0x000F);
        LittleEndian.putShort(_header, 2, (short)_type);
        // record length not yet known ...

        ei = new EncryptionInfo(EncryptionMode.cryptoAPI);
    }

    /**
     * Initializes the encryption settings
     *
     * @param keyBits see {@link CipherAlgorithm#rc4} for allowed values, use -1 for default size
     */
    public void initializeEncryptionInfo(int keyBits) {
        ei = new EncryptionInfo(EncryptionMode.cryptoAPI, CipherAlgorithm.rc4, HashAlgorithm.sha1, keyBits, -1, null);
    }

    /**
     * Return the length of the encryption key, in bits
     */
    public int getKeyLength() {
        return ei.getHeader().getKeySize();
    }

    /**
     * Return the name of the encryption provider used
     */
    public String getEncryptionProviderName() {
        return ei.getHeader().getCspName();
    }

    /**
     * @return the {@link EncryptionInfo} object for details about encryption settings
     */
    public EncryptionInfo getEncryptionInfo() {
        return ei;
    }


    /**
     * We are of type 12052
     */
    public long getRecordType() { return _type; }

    /**
     * Write the contents of the record back, so it can be written
     *  to disk
     */
    public void writeOut(OutputStream out) throws IOException {

        // Data
        byte[] data = new byte[1024];
        LittleEndianByteArrayOutputStream bos = new LittleEndianByteArrayOutputStream(data, 0);
        bos.writeShort(ei.getVersionMajor());
        bos.writeShort(ei.getVersionMinor());
        bos.writeInt(ei.getEncryptionFlags());

        ((CryptoAPIEncryptionHeader)ei.getHeader()).write(bos);
        ((CryptoAPIEncryptionVerifier)ei.getVerifier()).write(bos);

        // Header
        LittleEndian.putInt(_header, 4, bos.getWriteIndex());
        out.write(_header);
        out.write(data, 0, bos.getWriteIndex());
        bos.close();
    }

    @Override
    public void updateOtherRecordReferences(Map<Integer,Integer> oldToNewReferencesLookup) {
        // nothing to update
    }

    @Override
    public Map<String, Supplier<?>> getGenericProperties() {
        return GenericRecordUtil.getGenericProperties(
            "encryptionInfo", this::getEncryptionInfo
        );
    }
}

⏎ org/apache/poi/hslf/record/DocumentEncryptionAtom.java

Or download all of them as a single archive file:

File name: poi-scratchpad-5.2.3-src.zip
File size: 1238744 bytes
Release date: 2022-09-09
Download 

⇒ What Is poi-examples-5.2.3.jar?

⇐ What Is poi-excelant-5.2.3.jar?

⇑ Downloading and Installing Apache POI Java Library

⇑⇑ FAQ for Apache POI (Poor Obfuscation Implementation)