Java中的Diffie

本文介绍了Java中的Diffie-Hellman密钥交换的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在开发一个Java项目，涉及通过不安全的渠道发送敏感数据。我需要知道如何使用其库在Java中实现Diffie Hellman密钥交换（DHKE）。我知道关于它的所有加密理论所以不需要详细说明，我只需要一个非常基本的实现，所以我可以让2个程序共享一个密钥。我从java2s获得了示例，但它没有完成：

I am working on a personal project in Java which involves sending sensitive data over an insecure channel. I need to know how to implement Diffie Hellman Key Exchange (DHKE) in java using its libraries. I know all the cryptographic theory about it so no need to go into details, I just need a very basic implementation so I cand have 2 programs share a secret key. I got the example from java2s, but it is not complete:

import java.math.BigInteger; import java.security.KeyFactory; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.SecureRandom; import javax.crypto.spec.DHParameterSpec; import javax.crypto.spec.DHPublicKeySpec; public class Main { public final static int pValue = 47; public final static int gValue = 71; public final static int XaValue = 9; public final static int XbValue = 14; public static void main(String[] args) throws Exception { BigInteger p = new BigInteger(Integer.toString(pValue)); BigInteger g = new BigInteger(Integer.toString(gValue)); BigInteger Xa = new BigInteger(Integer.toString(XaValue)); BigInteger Xb = new BigInteger(Integer.toString(XbValue)); int bitLength = 512; // 512 bits SecureRandom rnd = new SecureRandom(); p = BigInteger.probablePrime(bitLength, rnd); g = BigInteger.probablePrime(bitLength, rnd); createSpecificKey(p, g); } public static void createSpecificKey(BigInteger p, BigInteger g) throws Exception { KeyPairGenerator kpg = KeyPairGenerator.getInstance("DiffieHellman"); DHParameterSpec param = new DHParameterSpec(p, g); kpg.initialize(param); KeyPair kp = kpg.generateKeyPair(); KeyFactory kfactory = KeyFactory.getInstance("DiffieHellman"); DHPublicKeySpec kspec = (DHPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), DHPublicKeySpec.class); } }

我如何继续？任何人都可以帮我完成剩余的代码吗？

How do I go on from this? Could anyone help me complete the remaining code?

推荐答案

正式的Oracle Docs ？他们在那里显示代码中的DH密钥交换。

What about the official Oracle Docs? They show a DH key exchange in code there.