Jets3tDecrypt.java

// Apache 2 license 
public static void main(final String... args) throws GeneralSecurityException, IOException
{

 if (args.length != 4 && args.length != 2)
 {
   System.err.println("Usage: Decrypt [-alg algorithm] KEY FILE");
   System.exit(1);
 }

 final String alg;
 final String key;
 final File encryptedFile;

  if (args.length == 4)
  {
    alg = args[1];
    key = args[2];
    encryptedFile = new File(args[3]);
  }
  else // use defaults for algorithm:
  {
    alg = "PBEWithMD5AndDES";
    key = args[0];
    encryptedFile = new File(args[1]);
  }

  final EncryptionUtil eu = new EncryptionUtil(key, alg, EncryptionUtil.DEFAULT_VERSION);

  CipherInputStream decrypt=null;
  BufferedOutputStream outStream=null;
  try
  { 
    decrypt = eu.decrypt(new FileInputStream(encryptedFile));
    IOUtils.copy(decrypt, System.out);
  }
  finally
  {
   IOUtils.closeQuietly(decrypt);
   IOUtils.closeQuietly(System.out);
  }

}