生成产品许可的串行或十六进制代码 [英] Generating serial or hex code for product licensing

问题描述

有没有办法生成串行/十六进制代码，如：xxxx-xxxx-xxxx-xxxx-xxxx-xxxx
使用java api？当产品解密代码时，应该可以提取

Is there way to generate serial/hex code something like: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx using java api? when product decipher the code it should able to extract

1. 名称


2. 有效性


3. Mac地址


4. 其他信息

1. Name
2. Validity
3. Mac Address
4. Additional information

代码将基于以上因素。我试图用私钥/公钥 RSA / ECB / PKCS1Padding 。然后转换为HEX，但需要4096的私钥六十六进制，并且生成的十六进制代码太长！

Code will be generated based on above factors. I have tried to RSA/ECB/PKCS1Padding with private key/public key. and then converting to HEX, but it needs private key sixe of 4096 and hex code generated is too long!

public class ProductKeyGenerator {
private static final String transformation = "RSA/ECB/PKCS1Padding";

public static void main(String[] args) {
    String cleartext = "CN=CompanyName;mac=some mac;@host=somehost;email=[e-mail];issued=01/01/20013;expire=12/12/2013";
    ProductKeyGenerator pgen = new ProductKeyGenerator();
    String productKey = pgen.generate(cleartext);
    System.out.println(productKey);
}

   ...
   ...
   ...
String generate(String data) {
    //encrypted hex
    String hexEnc = null;
    try {
        //--sign
        String signature = sign(data);
        data += ";sign=" + signature;

        byte[] dataBytes = data.getBytes("utf-8");
        //encrypt
        byte[] encBytes = encrypt(dataBytes);
        hexEnc = Hex.encodeHexString(encBytes);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return hexEnc;
}

String sign(String text) {
    String signed = null;
    try {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        byte[] data = text.getBytes("utf-8");
        byte[] digitalSignature = signData(data);
        signed = Hex.encodeHexString(digitalSignature);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return signed;
}
   ...
   ...
   ...

   }

推荐答案

使用自定义数据，您无法创建固定长度的序列号。但是，您可以将序列号与信息相关联。在数据库中。简单的序列号生成器：

With custom data you can't create a serial number with fixed length. But you can associate a serial number with information e.g. in database. Simple serial number generator:

String serial = UUID.randomUUID().toString().toUpperCase();
System.out.println(serial);

PS：在序列号中使用mac地址是非常不安全的。这很容易改变。

PS: It's very unsafe to use mac address in serial number. It's very easy to change.

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