cn.lynx.emi.license.ViewLicense.java Source code

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Here is the source code for cn.lynx.emi.license.ViewLicense.java

Source

package cn.lynx.emi.license;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.security.KeyFactory;
import java.security.spec.X509EncodedKeySpec;
import java.util.Date;

import javax.crypto.Cipher;

import org.apache.commons.codec.binary.Base64;

public class ViewLicense {
    private static final String LICENSE_CORE_KEY = "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";

    public static void main(String[] args) throws UnsupportedEncodingException {
        if (args == null || args.length <= 0) {
            System.err.println("Please provide the license string");
            return;
        }

        if (args.length == 1) {
            String license = args[0];
            LicenseBean lb = retrieveLicense(license);
            if (lb == null) {
                System.err.println("License Bean can't be deserialized.");
                return;
            }

            System.out.println("LB Machine Code:" + lb.getMachineCode());
            System.out.println("LB CPU:" + lb.getCpuCount());
            System.out.println("LB Mem:" + lb.getMemCount());
            System.out.println("LB Exp:" + new Date(lb.getExpireDate()));
        }
    }

    public static final LicenseBean retrieveLicense(String license) throws UnsupportedEncodingException {
        String decryptedLicense = _decrypt(license);
        try {
            ObjectInputStream ois = new ObjectInputStream(
                    new ByteArrayInputStream(Base64.decodeBase64(decryptedLicense)));
            LicenseBean bean = (LicenseBean) ois.readObject();
            return bean;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

    private static final String _decrypt(String data) {
        byte[] corekey = Base64.decodeBase64(LICENSE_CORE_KEY);
        byte[] rawData = Base64.decodeBase64(data);

        X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(corekey);
        try {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            Key publicKey = keyFactory.generatePublic(x509EncodedKeySpec);

            Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
            cipher.init(Cipher.DECRYPT_MODE, publicKey);

            return new String(cipher.doFinal(rawData), "UTF-8");
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}