How to use

LEDataOutputStream

in

de.schlichtherle.truezip.io

final long cdEntries = entries.size();
final long cdOffset = this.cdOffset;
final long cdSize = dos.size() - cdOffset;
final boolean cdEntriesZip64 = cdEntries > UShort.MAX_VALUE || FORCE_ZIP64_EXT;
final boolean cdSizeZip64    = cdSize    > UInt  .MAX_VALUE || FORCE_ZIP64_EXT;
if (zip64) {
  final long zip64eocdOffset // relative offset of the zip64 end of central directory record
      = dos.size();
  dos.writeInt(ZIP64_EOCDR_SIG);
  dos.writeLong(ZIP64_EOCDR_MIN_LEN - 12);
  dos.writeShort(63);
  dos.writeShort(46); // due to potential use of BZIP2 compression
  dos.writeInt(0);
  dos.writeInt(0);
  dos.writeLong(cdEntries);
  dos.writeLong(cdEntries);
  dos.writeLong(cdSize);
  dos.writeLong(cdOffset);

    this.dos = out instanceof LEDataOutputStream
      ? (LEDataOutputStream) out
      : new LEDataOutputStream(out);
this.delegate = new TeeOutputStream(dos, new MacOutputStream(mac));
dos.writeInt(SIGNATURE);
dos.writeByte(ENVELOPE_TYPE_0);
dos.writeByte(keyStrengthOrdinal);
dos.writeShort(ITERATION_COUNT);
dos.write(salt);
this.start = dos.size();
assert ENVELOPE_TYPE_0_HEADER_LEN_WO_SALT + salt.length == start;

dos.writeInt(CFH_SIG);
dos.writeShort((entry.getRawPlatform() << 8) | 63);
dos.writeShort(entry.getRawVersionNeededToExtract());
dos.writeShort(entry.getGeneralPurposeBitFlags());
dos.writeShort(entry.getRawMethod());
dos.writeInt((int) entry.getRawTime());
dos.writeInt((int) entry.getRawCrc());
dos.writeInt((int) entry.getRawCompressedSize());
dos.writeInt((int) entry.getRawSize());
dos.writeShort(name.length);
dos.writeShort(extra.length);
dos.writeShort(comment.length);
dos.writeShort(0);
dos.writeShort(0);
dos.writeInt((int) entry.getRawExternalAttributes());

  @Override
  protected void finish() throws IOException {
    // Flush partial block to out, if any.
    super.finish();

    final long trailer = dos.size();

    final Mac mac = this.mac;
    assert mac.getMacSize() == klac.getMacSize();
    final byte[] buf = new byte[mac.getMacSize()]; // MAC buffer
    int bufLength;

    // Compute and write the first half of the KLAC to the data envelope footer.
    // Please note that we will only use the first half of the
    // authentication code for security reasons.
    final long length = trailer - start; // message length
    klac(klac, length, buf);
    dos.write(buf, 0, buf.length / 2);

    // Compute and write the first half of the MAC to the data envelope footer.
    // Again, we will only use the first half of the
    // authentication code for security reasons.
    bufLength = mac.doFinal(buf, 0);
    assert bufLength == buf.length;
    dos.write(buf, 0, buf.length / 2);

    assert dos.size() - trailer == buf.length;
  }
}

  @Override
  protected void finish() throws IOException {
    // Flush partial block to out, if any.
    super.finish();

    // Compute and write the first half of the MAC to the footer.
    final byte[] buf = mos.getMac();
    dos.write(buf, 0, buf.length / 2);
  }
}

/**
 * Returns the total number of (compressed) bytes this stream has written
 * to the underlying stream.
 */
public long length() {
  return this.dos.size();
}

@CreatesObligation
@edu.umd.cs.findbugs.annotations.SuppressWarnings("OBL_UNSATISFIED_OBLIGATION")
private static LEDataOutputStream newLEDataOutputStream(
    final @WillCloseWhenClosed OutputStream out,
    final @CheckForNull @WillNotClose RawZipFile<?> appendee) {
  if (null == out)
    throw new NullPointerException();
  return null != appendee
      ? new AppendingLEDataOutputStream(out, appendee)
      : out instanceof LEDataOutputStream
        ? (LEDataOutputStream) out
        : new LEDataOutputStream(out);
}

private void writePasswordVerifier(KeyParameter keyParam)
throws IOException {
  dos.write(
      keyParam.getKey(),
      2 * param.getKeyStrength().getBytes(),
      PWD_VERIFIER_BITS / 8);
}

closeEntry();
final LEDataOutputStream dos = this.dos;
this.cdOffset = dos.size();
final Iterator<E> i = this.entries.values().iterator();
while (i.hasNext())

dos.write(salt);
writePasswordVerifier(keyParam);