de.schlichtherle.io.samples.Decrypt Maven / Gradle / Ivy
/*
* Copyright (C) 2007-2010 Schlichtherle IT Services
*
* Licensed 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 de.schlichtherle.io.samples;
import de.schlichtherle.io.*;
import de.schlichtherle.io.File;
import java.io.*;
import java.util.ResourceBundle;
/**
* Decrypts the contents of the RAES file provided as the first argument
* into the file provided as the second argument for the main method.
*
* Please note that you should not use this utility to decrypt an RAES
* encrypted ZIP file (usually a file with a {@code ".tzp"} or
* {@code ".zip.rae"} suffix) back to a plain ZIP file.
* This is because RAES encrypted ZIP files use the "UTF-8"
* as their character set, whereas plain ZIP files use "IBM437",
* a.k.a. "CP437".
* To decrypt an RAES encrypted ZIP file to a plain ZIP file, use the
* {@code "cp"} command of the {@link NZip} class instead.
* This class knows about the correct character set charsets for the
* various flavours of ZIP compatible files.
*
* @author Christian Schlichtherle
* @version $Id: Decrypt.java 06f3ba684701 2010/11/04 01:15:55 christian $
* @since TrueZIP 6.5
*/
public class Decrypt extends CommandLineUtility {
private static final String CLASS_NAME
= "de.schlichtherle.io.samples.Decrypt";
private static final ResourceBundle resources
= ResourceBundle.getBundle(CLASS_NAME);
public Decrypt() {
}
public Decrypt(OutputStream out, OutputStream err, boolean autoFlush) {
super(out, err, autoFlush);
}
/** Equivalent to {@code System.exit(new Decrypt().run(args));}. */
public static void main(final String[] args) {
System.exit(new Decrypt().run(args));
}
public boolean runWithException(final String[] args)
throws IllegalUsageException, IOException {
if (args.length != 2)
throw new IllegalUsageException();
if (new File(args[1]).isEntry())
progressMonitor.start();
RaesFiles.decrypt(args[0], args[1], true);
return true;
}
public class IllegalUsageException
extends CommandLineUtility.IllegalUsageException {
private IllegalUsageException() {
super(resources.getString("usage"));
}
} // class IllegalUsageException
}