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The addc-base library supplies classes for creating UUIDs, converting between types, outputting byte arrays with different formats, support for Julian dates, delay generators, parsing properties files and support for I18N.

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package com.addc.commons.passwd;

import java.io.File;
import java.io.IOException;
import java.security.GeneralSecurityException;

import com.addc.commons.io.ConsoleReader;

/**
 * The EncryptPass supplies a program interface to the {@link PasswordEncryptor} class.
 * 
 * To generate master key for current user:
 * 
 * java -jar addc-base-2.2.jar -m
 * or
 * java -jar addc-base-2.2.jar --master
 * 
 * To encrypt a password:
 *  * java -jar addc-base-2.2.jar -e
 * 
 */
@SuppressWarnings({ "PMD.SystemPrintln", "PMD.AvoidPrintStackTrace", "PMD.DoNotCallSystemExit"})
public final class EncryptPass {
    private final PasswordEncryptor encryptor;
    private final ConsoleReader reader;

    private EncryptPass() {
        encryptor= new PasswordEncryptor();
        reader= new ConsoleReader();
    }

    private void encryptPass() throws GeneralSecurityException {
        char[] pwd= reader.getPassword();
        System.out.println(encryptor.encrypt(new String(pwd)));
    }

    private void genMasterIv() throws IOException {
        File masterKeyFile= encryptor.getMasterKeyFile();
        if (masterKeyFile.exists() && !reader.yesNo("Overwrite existing key?")) {
            return;
        }
        encryptor.generateMasterKey();
    }

    /**
     * Main program entry point
     * 
     * @param args
     *            The arguments
     */
    public static void main(String[] args) {
        EncryptPass ep= new EncryptPass();

        if (args.length != 1) {
            help();
        }
        try {
            if ("-m".equals(args[0]) || "--master".equals(args[0])) {
                ep.genMasterIv();
            } else if ("-e".equals(args[0]) || "--encrypt".equals(args[0])) {
                ep.encryptPass();
            } else if ("-h".equals(args[0]) || "--help".equals(args[0])) {
                help();
            } else {
                help();
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
        System.exit(0);
    }

    private static void help() {
        System.out.println("Error Missing parameter");
        System.out.println("Usage: java -jar pwd-encrypt-3.1.jar <-e | -m | -h>");
        System.out.println("Where:");
        System.out.println("    -m --master  : Generate a master passsword for the current user");
        System.out.println("    -e --encrypt : Encrypt a password");
        System.out.println("    -h --help    : show this help");
        System.exit(-1);
    }
}