基于TrueLicense实现产品License验证功能

时间:2023-03-09 18:10:09
基于TrueLicense实现产品License验证功能

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

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;
}
}

2、  然后是主要生成 license 的代码 CreateLicense.java

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;
}
}

3、  测试程序 licenseCreateTest.java

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();
}
}

4、  生成时使用到的 param.properties 文件如下

##########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

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

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;
}
}

3、  验证测试程序 licenseVerifyTest.java

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();
}
}

4、  验证时使用到的Properties文件

##########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

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.****.net/luckymelina/article/details/22870665

老张专栏(支持绑定MAC地址)

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


作者:朝雨忆轻尘
出处:https://www.cnblogs.com/xifengxiaoma/
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