com.ubipass.middleware.web.action.LicenceMgtAction.java Source code

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Here is the source code for com.ubipass.middleware.web.action.LicenceMgtAction.java

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/*
 * $Source: D:/cvsrepository/middleware/src/java/com/ubipass/middleware/web/action/LicenceMgtAction.java,v $
 * LastModified By: $Author: donghongshan $
 * $Date: 2005/05/11 03:54:42 $
 * 
 */

package com.ubipass.middleware.web.action;

import com.ubipass.middleware.ems.exception.InvalidLicenseException;

import org.apache.commons.codec.binary.Base64;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.security.SecureRandom;
import java.util.Calendar;
import java.util.Properties;

/**
 * Action class to list HTTP command interface.
 * 
 * @author Donghongshan
 * @author $Author: donghongshan $
 * @version $Revision: 1.10 $
 */
public class LicenceMgtAction extends Action {
    private static final String LICENCE_FILE = "conf/licence.properties";

    /**
     * Action of display licence management page.
     * 
     * @param mapping
     *            ActionMapping
     * @param form
     *            ActionForm
     * @param request
     *            HttpServletRequest
     * @param response
     *            HttpServletResponse
     * @return ActionForward forward to Struts page
     * @throws Exception
     * @see org.apache.struts.action.Action
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
            HttpServletResponse response) throws Exception {

        request.getSession().setAttribute("page", "0,2");

        File file = new File(this.getServlet().getServletContext().getRealPath("/" + LICENCE_FILE));
        FileInputStream is;
        String userName = "";
        String licenceKey = "";
        String ExperDate = "0000-00-00";
        try {
            is = new FileInputStream(file);

            Properties properties = new Properties();
            properties.load(is);

            userName = properties.getProperty("userName");
            licenceKey = properties.getProperty("licenceKey");

            ExperDate = getDate(userName, licenceKey);
            Calendar cal = Calendar.getInstance();

            try {
                cal.setTimeInMillis(Long.parseLong(ExperDate));

                ExperDate = String.valueOf(cal.get(Calendar.YEAR)) + "-" + strReformat(cal.get(Calendar.MONTH) + 1)
                        + "-" + strReformat(cal.get(Calendar.DATE));

            } catch (Exception e) {
                ExperDate = "0000-00-00";
            }

            request.setAttribute("userName", userName);
            request.setAttribute("ExperDate", ExperDate);
            request.setAttribute("licenceKey", licenceKey);

            is.close();

            return mapping.findForward("Successful");
        } catch (Exception e) {
            request.setAttribute("error", "error");
            request.setAttribute("userName", userName);
            request.setAttribute("ExperDate", ExperDate);
            request.setAttribute("licenceKey", licenceKey);
            return mapping.findForward("Successful");
        }
    }

    /**
     * reformat month or day.
     * 
     * @param number
     * @return reformat String
     */
    private String strReformat(int number) {
        if (number > 10)
            return String.valueOf(number);
        else
            return ("0" + String.valueOf(number));
    }

    private String getDate(String userName, String licenceKey) throws Exception {

        // DES????
        SecureRandom sr = new SecureRandom();

        byte rawKeyData[] = (userName + "midware").getBytes();

        // ?DESKeySpec
        DESKeySpec dks = new DESKeySpec(rawKeyData);

        // ?DESKeySpec??
        // SecretKey
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(dks);

        // Cipher??
        Cipher cipher = Cipher.getInstance("DES");

        // ?Cipher
        cipher.init(Cipher.DECRYPT_MODE, key, sr);

        // ??
        licenceKey = new String(cipher.doFinal(Base64.decodeBase64(licenceKey.getBytes())));

        String[] tmpStr = licenceKey.split("-");

        if (tmpStr.length == 2)
            return tmpStr[1];

        throw new InvalidLicenseException();

    }

}