Java

Unzip an AES Encrypted Text File directly into a String Variable

See more Zip Examples

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkZip zip = new CkZip();

    // This example opens a WinZip-compatible AES encrypted
    // .zip that contains a single file: hamlet.xml.

    // It decrypts and unzips hamlet.xml directly into a string
    // variable.
    zip.SetPassword("secret");
    success = zip.OpenZip("qa_data/hamlet.zip");
    if (success == false) {
        System.out.println(zip.lastErrorText());
        return;
        }

    CkZipEntry entry = new CkZipEntry();
    success = zip.EntryOf("hamlet.xml",entry);
    if (success == false) {
        System.out.println(zip.lastErrorText());
        return;
        }

    // lineEndingBehavior:
    // 0 = leave unchanged.
    // 1 = convert all to bare LF's
    // 2 = convert all to CRLF's
    int lineEndingBehavior = 0;
    String srcCharset = "utf-8";
    String xmlText = entry.unzipToString(lineEndingBehavior,srcCharset);
    System.out.println(xmlText);
  }
}