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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:
⏎ org/apache/poi/hssf/record/crypto/Biff8DecryptingStream.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.hssf.record.crypto; import java.io.InputStream; import java.io.PushbackInputStream; import org.apache.poi.hssf.record.*; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.crypt.ChunkedCipherInputStream; import org.apache.poi.poifs.crypt.Decryptor; import org.apache.poi.poifs.crypt.EncryptionInfo; import org.apache.poi.util.IOUtils; import org.apache.poi.util.Internal; import org.apache.poi.util.LittleEndian; import org.apache.poi.util.LittleEndianConsts; import org.apache.poi.util.LittleEndianInput; import org.apache.poi.util.RecordFormatException; import org.apache.poi.util.SuppressForbidden; public final class Biff8DecryptingStream implements BiffHeaderInput, LittleEndianInput { public static final int RC4_REKEYING_INTERVAL = 1024; private final ChunkedCipherInputStream ccis; private final byte[] buffer = new byte[LittleEndianConsts.LONG_SIZE]; private boolean shouldSkipEncryptionOnCurrentRecord; public Biff8DecryptingStream(InputStream in, int initialOffset, EncryptionInfo info) throws RecordFormatException { try { byte[] initialBuf = IOUtils.safelyAllocate(initialOffset, HSSFWorkbook.getMaxRecordLength()); InputStream stream; if (initialOffset == 0) { stream = in; } else { stream = new PushbackInputStream(in, initialOffset); ((PushbackInputStream)stream).unread(initialBuf); } Decryptor dec = info.getDecryptor(); dec.setChunkSize(RC4_REKEYING_INTERVAL); ccis = (ChunkedCipherInputStream)dec.getDataStream(stream, Integer.MAX_VALUE, 0); if (initialOffset > 0) { ccis.readFully(initialBuf); } } catch (Exception e) { throw new RecordFormatException(e); } } @Override @SuppressForbidden("just delegating") public int available() { return ccis.available(); } /** * Reads an unsigned short value without decrypting */ @Override public int readRecordSID() { readPlain(buffer, 0, LittleEndianConsts.SHORT_SIZE); int sid = LittleEndian.getUShort(buffer, 0); shouldSkipEncryptionOnCurrentRecord = isNeverEncryptedRecord(sid); return sid; } /** * Reads an unsigned short value without decrypting */ @Override public int readDataSize() { readPlain(buffer, 0, LittleEndianConsts.SHORT_SIZE); int dataSize = LittleEndian.getUShort(buffer, 0); ccis.setNextRecordSize(dataSize); return dataSize; } @Override public double readDouble() { long valueLongBits = readLong(); double result = Double.longBitsToDouble(valueLongBits); if (Double.isNaN(result)) { // (Because Excel typically doesn't write NaN throw new RuntimeException("Did not expect to read NaN"); } return result; } @Override public void readFully(byte[] buf) { readFully(buf, 0, buf.length); } @Override public void readFully(byte[] buf, int off, int len) { if (shouldSkipEncryptionOnCurrentRecord) { readPlain(buf, off, buf.length); } else { ccis.readFully(buf, off, len); } } @Override public int readUByte() { return readByte() & 0xFF; } @Override public byte readByte() { if (shouldSkipEncryptionOnCurrentRecord) { readPlain(buffer, 0, LittleEndianConsts.BYTE_SIZE); return buffer[0]; } else { return ccis.readByte(); } } @Override public int readUShort() { return readShort() & 0xFFFF; } @Override public short readShort() { if (shouldSkipEncryptionOnCurrentRecord) { readPlain(buffer, 0, LittleEndianConsts.SHORT_SIZE); return LittleEndian.getShort(buffer); } else { return ccis.readShort(); } } @Override public int readInt() { if (shouldSkipEncryptionOnCurrentRecord) { readPlain(buffer, 0, LittleEndianConsts.INT_SIZE); return LittleEndian.getInt(buffer); } else { return ccis.readInt(); } } @Override public long readLong() { if (shouldSkipEncryptionOnCurrentRecord) { readPlain(buffer, 0, LittleEndianConsts.LONG_SIZE); return LittleEndian.getLong(buffer); } else { return ccis.readLong(); } } /** * @return the absolute position in the stream */ public long getPosition() { return ccis.getPos(); } /** * TODO: Additionally, the lbPlyPos (position_of_BOF) field of the BoundSheet8 record MUST NOT be encrypted. * * @return {@code true} if record type specified by {@code sid} is never encrypted */ public static boolean isNeverEncryptedRecord(int sid) { switch (sid) { case BOFRecord.sid: // sheet BOFs for sure // TODO - find out about chart BOFs case InterfaceHdrRecord.sid: // don't know why this record doesn't seem to get encrypted case FilePassRecord.sid: // this only really counts when writing because FILEPASS is read early // UsrExcl(0x0194) // FileLock // RRDInfo(0x0196) // RRDHead(0x0138) return true; default: return false; } } @Override public void readPlain(byte[] b, int off, int len) { ccis.readPlain(b, off, len); } @Internal public boolean isCurrentRecordEncrypted() { return !shouldSkipEncryptionOnCurrentRecord; } }
⏎ org/apache/poi/hssf/record/crypto/Biff8DecryptingStream.java
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 Download
⇒ What Is poi-ooxml-5.2.3.jar?
⇐ What Is poi-bin-5.2.3-20220909.zip?
2017-04-04, 56006👍, 0💬
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