受朋友所托,需要给产品加上License验证功能,进行试用期授权,在试用期过后,产品不再可用。

通过研究调查,可以利用Truelicense开源框架实现,下面分享一下如何利用Truelicense实现授权验证功能。

在此之前先介绍一下License授权和验证的原理:

1、  首先需要生成密钥对,方法有很多,JDK中提供的KeyTool即可生成。

2、  授权者保留私钥,使用私钥对包含授权信息(如截止日期,MAC地址等)的license进行数字签名。

3、  公钥交给使用者(放在验证的代码中使用),用于验证license是否符合使用条件。

 

实现步骤(代码参考前贤网上案例实现,不再赘写):

一、使用KeyTool生成密钥对

转到CMD命令行,切换到%JAVA_HOME%\jre\bin\security\ 目录(KeyTool工具一般在此目录),执行命令生成的密钥对:

1、首先利用KeyTool工具来生成私匙库:(-alias别名 –validity 3650表示10年有效)

keytool -genkey -alias privatekey -keystoreprivateKeys.store -validity 3650

2、然后把私匙库内的公匙导出到一个文件当中:

keytool -export -alias privatekey -file certfile.cer -keystore privateKeys.store

3、然后再把这个证书文件导入到公匙库:

keytool -import -alias publiccert -file certfile.cer -keystore publicCerts.store

最后生成文件privateKeys.store、publicCerts.store拷贝出来备用。

 

二、生成证书(该部分代码由授权者独立保管执行)

1、  首先是 LicenseManagerHolder.java 类

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package cn.melina.license;
import de.schlichtherle.license.LicenseManager;
import de.schlichtherle.license.LicenseParam;
 
/**
 * LicenseManagerHolder 
 * @author melina
 */
public class LicenseManagerHolder {
    
    private static LicenseManager licenseManager;
 
    public static synchronized LicenseManager getLicenseManager(LicenseParam licenseParams) {
        if (licenseManager == null) {
            licenseManager = new LicenseManager(licenseParams);
        }
        return licenseManager;
    }
}
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2、  然后是主要生成 license 的代码 CreateLicense.java

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package cn.melina.license;
 
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Properties;
import java.util.prefs.Preferences;
import javax.security.auth.x500.X500Principal;
import de.schlichtherle.license.CipherParam;
import de.schlichtherle.license.DefaultCipherParam;
import de.schlichtherle.license.DefaultKeyStoreParam;
import de.schlichtherle.license.DefaultLicenseParam;
import de.schlichtherle.license.KeyStoreParam;
import de.schlichtherle.license.LicenseContent;
import de.schlichtherle.license.LicenseParam;
import de.schlichtherle.license.LicenseManager;
 
/**
 * CreateLicense
 * @author melina
 */
public class CreateLicense {
    //common param
    private static String PRIVATEALIAS = "";
    private static String KEYPWD = "";
    private static String STOREPWD = "";
    private static String SUBJECT = "";
    private static String licPath = "";
    private static String priPath = "";
    //license content
    private static String issuedTime = "";
    private static String notBefore = "";
    private static String notAfter = "";
    private static String consumerType = "";
    private static int consumerAmount = 0;
    private static String info = "";
    // 为了方便直接用的API里的例子
    // X500Princal是一个证书文件的固有格式,详见API
    private final static X500Principal DEFAULTHOLDERANDISSUER = new X500Principal(
            "CN=Duke、OU=JavaSoft、O=Sun Microsystems、C=US");
    
    public void setParam(String propertiesPath) {
        // 获取参数
        Properties prop = new Properties();
        InputStream in = getClass().getResourceAsStream(propertiesPath);
        try {
            prop.load(in);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        PRIVATEALIAS = prop.getProperty("PRIVATEALIAS");
        KEYPWD = prop.getProperty("KEYPWD");
        STOREPWD = prop.getProperty("STOREPWD");
        SUBJECT = prop.getProperty("SUBJECT");
        KEYPWD = prop.getProperty("KEYPWD");
        licPath = prop.getProperty("licPath");
        priPath = prop.getProperty("priPath");
        //license content
        issuedTime = prop.getProperty("issuedTime");
        notBefore = prop.getProperty("notBefore");
        notAfter = prop.getProperty("notAfter");
        consumerType = prop.getProperty("consumerType");
        consumerAmount = Integer.valueOf(prop.getProperty("consumerAmount"));
        info = prop.getProperty("info");
        
    }
 
    public boolean create() {        
        try {
            /************** 证书发布者端执行 ******************/
            LicenseManager licenseManager = LicenseManagerHolder
                    .getLicenseManager(initLicenseParams0());
            licenseManager.store((createLicenseContent()), new File(licPath));    
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("客户端证书生成失败!");
            return false;
        }
        System.out.println("服务器端生成证书成功!");
        return true;
    }
 
    // 返回生成证书时需要的参数
    private static LicenseParam initLicenseParams0() {
        Preferences preference = Preferences
                .userNodeForPackage(CreateLicense.class);
        // 设置对证书内容加密的对称密码
        CipherParam cipherParam = new DefaultCipherParam(STOREPWD);
        // 参数1,2从哪个Class.getResource()获得密钥库;参数3密钥库的别名;参数4密钥库存储密码;参数5密钥库密码
        KeyStoreParam privateStoreParam = new DefaultKeyStoreParam(
                CreateLicense.class, priPath, PRIVATEALIAS, STOREPWD, KEYPWD);
        LicenseParam licenseParams = new DefaultLicenseParam(SUBJECT,
                preference, privateStoreParam, cipherParam);
        return licenseParams;
    }
 
    // 从外部表单拿到证书的内容
        public final static LicenseContent createLicenseContent() {
            DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            LicenseContent content = null;
            content = new LicenseContent();
            content.setSubject(SUBJECT);
            content.setHolder(DEFAULTHOLDERANDISSUER);
            content.setIssuer(DEFAULTHOLDERANDISSUER);
            try {
                content.setIssued(format.parse(issuedTime));
                content.setNotBefore(format.parse(notBefore));
                content.setNotAfter(format.parse(notAfter));
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            content.setConsumerType(consumerType);
            content.setConsumerAmount(consumerAmount);
            content.setInfo(info);
            // 扩展
            content.setExtra(new Object());
            return content;
        }
}
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3、  测试程序 licenseCreateTest.java

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package cn.melina.license;
import cn.melina.license.CreateLicense;
public class licenseCreateTest {
    public static void main(String[] args){
        CreateLicense cLicense = new CreateLicense();
        //获取参数
        cLicense.setParam("./param.properties");
        //生成证书
        cLicense.create();
    }
}
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4、  生成时使用到的 param.properties 文件如下

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##########common parameters###########
#alias
PRIVATEALIAS=privatekey
#key(该密码生成密钥对的密码,需要妥善保管,不能让使用者知道)
KEYPWD=bigdata123456
#STOREPWD(该密码是在使用keytool生成密钥对时设置的密钥库的访问密码)
STOREPWD=abc123456
#SUBJECT
SUBJECT=bigdata
#licPath
licPath=bigdata.lic
#priPath
priPath=privateKeys.store
##########license content###########
#issuedTime
issuedTime=2014-04-01
#notBeforeTime
notBefore=2014-04-01
#notAfterTime
notAfter=2014-05-01
#consumerType
consumerType=user
#ConsumerAmount
consumerAmount=1
#info
info=this is a license
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根据properties文件可以看出,这里只简单设置了使用时间的限制,当然可以自定义添加更多限制。该文件中表示授权者拥有私钥,并且知道生成密钥对的密码。并且设置license的内容。

 

三、验证证书(使用证书)(该部分代码结合需要授权的程序一起使用)

 

1、  首先 LicenseManagerHolder.java 类,同上。

 

2、  然后是主要验证 license 的代码 VerifyLicense.java

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package cn.melina.license;
 
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.prefs.Preferences;
 
import de.schlichtherle.license.CipherParam;
import de.schlichtherle.license.DefaultCipherParam;
import de.schlichtherle.license.DefaultKeyStoreParam;
import de.schlichtherle.license.DefaultLicenseParam;
import de.schlichtherle.license.KeyStoreParam;
import de.schlichtherle.license.LicenseParam;
import de.schlichtherle.license.LicenseManager;
 
/**
 * VerifyLicense
 * @author melina
 */
public class VerifyLicense {
    //common param
    private static String PUBLICALIAS = "";
    private static String STOREPWD = "";
    private static String SUBJECT = "";
    private static String licPath = "";
    private static String pubPath = "";
    
    public void setParam(String propertiesPath) {
        // 获取参数
        Properties prop = new Properties();
        InputStream in = getClass().getResourceAsStream(propertiesPath);
        try {
            prop.load(in);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        PUBLICALIAS = prop.getProperty("PUBLICALIAS");
        STOREPWD = prop.getProperty("STOREPWD");
        SUBJECT = prop.getProperty("SUBJECT");
        licPath = prop.getProperty("licPath");
        pubPath = prop.getProperty("pubPath");
    }
 
    public boolean verify() {        
        /************** 证书使用者端执行 ******************/
 
        LicenseManager licenseManager = LicenseManagerHolder
                .getLicenseManager(initLicenseParams());
        // 安装证书
        try {
            licenseManager.install(new File(licPath));
            System.out.println("客户端安装证书成功!");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("客户端证书安装失败!");
            return false;
        }
        // 验证证书
        try {
            licenseManager.verify();
            System.out.println("客户端验证证书成功!");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("客户端证书验证失效!");
            return false;
        }
        return true;
    }
 
    // 返回验证证书需要的参数
    private static LicenseParam initLicenseParams() {
        Preferences preference = Preferences
                .userNodeForPackage(VerifyLicense.class);
        CipherParam cipherParam = new DefaultCipherParam(STOREPWD);
 
        KeyStoreParam privateStoreParam = new DefaultKeyStoreParam(
                VerifyLicense.class, pubPath, PUBLICALIAS, STOREPWD, null);
        LicenseParam licenseParams = new DefaultLicenseParam(SUBJECT,
                preference, privateStoreParam, cipherParam);
        return licenseParams;
    }
}
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3、  验证测试程序 licenseVerifyTest.java

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package cn.melina.license;
 
public class licenseVerifyTest {
    public static void main(String[] args){
        VerifyLicense vLicense = new VerifyLicense();
        //获取参数
        vLicense.setParam("./param.properties");
        //验证证书
        vLicense.verify();
    }
}
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4、  验证时使用到的Properties文件

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##########common parameters###########
#alias
PUBLICALIAS=publiccert
#STOREPWD(该密码是在使用keytool生成密钥对时设置的密钥库的访问密码)
STOREPWD=abc123456
#SUBJECT
SUBJECT=bigdata
#licPath
licPath=bigdata.lic
#pubPath
pubPath=publicCerts.store
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根据该验证的properties可以看出,使用者只拥有公钥,没有私钥,并且也只知道访问密钥库的密码,而不能知道生成密钥对的密码。

 

四、参考资料

truelicense官网

https://sourceforge.net/projects/truelicense/

luckymelina专栏

https://blog.csdn.net/luckymelina/article/details/22870665

老张专栏(支持绑定MAC地址)

https://blog.csdn.net/jingshuaizh/article/details/44461289

 

 


 作者:朝雨忆轻尘
出处:https://www.cnblogs.com/xifengxiaoma/ 
版权所有,欢迎转载,转载请注明原文作者及出处。