net.lingala.zip4j.io.inputstream.ZipStandardCipherInputStream Maven / Gradle / Ivy

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An open source java library to handle zip files

There is a newer version: 2.11.5

package net.lingala.zip4j.io.inputstream;

import net.lingala.zip4j.crypto.StandardDecrypter;
import net.lingala.zip4j.model.LocalFileHeader;

import java.io.IOException;

import static net.lingala.zip4j.util.InternalZipConstants.STD_DEC_HDR_SIZE;

class ZipStandardCipherInputStream extends CipherInputStream {

  public ZipStandardCipherInputStream(ZipEntryInputStream zipEntryInputStream, LocalFileHeader localFileHeader,
                                      char[] password, int bufferSize, boolean useUtf8ForPassword) throws IOException {
    super(zipEntryInputStream, localFileHeader, password, bufferSize, useUtf8ForPassword);
  }

  @Override
  protected StandardDecrypter initializeDecrypter(LocalFileHeader localFileHeader, char[] password,
                                                  boolean useUtf8ForPassword) throws IOException {
    return new StandardDecrypter(password, localFileHeader.getCrc(), localFileHeader.getLastModifiedTime(),
        getStandardDecrypterHeaderBytes(), useUtf8ForPassword);
  }

  private byte[] getStandardDecrypterHeaderBytes() throws IOException {
    byte[] headerBytes = new byte[STD_DEC_HDR_SIZE];
    readRaw(headerBytes);
    return headerBytes;
  }
}