C#与Java之间的Diffie-Hellman算法

using System;
using System.Security.Cryptography;

class Program
{
    static void Main()
    {
        using (ECDiffieHellman keyExchange = new ECDiffieHellman())
        {
            keyExchange.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
            keyExchange.HashAlgorithm = HashAlgorithmName.SHA256;

            byte[] alicePrivateKey = keyExchange.Key.ExportSubjectPublicKeyInfo();
            byte[] bobPrivateKey = keyExchange.Key.ExportSubjectPublicKeyInfo();

            using (ECDiffieHellman alice = new ECDiffieHellman(alicePrivateKey))
            using (ECDiffieHellman bob = new ECDiffieHellman(bobPrivateKey))
            {
                byte[] aliceSharedSecret = alice.DeriveKeyMaterial(bob.PublicKey);
                byte[] bobSharedSecret = bob.DeriveKeyMaterial(alice.PublicKey);

                Console.WriteLine("Alice's shared secret: " + BitConverter.ToString(aliceSharedSecret));
                Console.WriteLine("Bob's shared secret: " + BitConverter.ToString(bobSharedSecret));
            }
        }
    }
}

import javax.crypto.KeyAgreement;
import javax.crypto.interfaces.DHPrivateKey;
import javax.crypto.interfaces.DHPublicKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.*;

public class DHExample {
    public static void main(String[] args) throws Exception {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH");
        keyGen.initialize(2048);

        KeyPair alicePair = keyGen.generateKeyPair();
        KeyPair bobPair = keyGen.generateKeyPair();

        KeyAgreement aliceKeyAgree = KeyAgreement.getInstance("DH");
        aliceKeyAgree.init(alicePair.getPrivate());
        aliceKeyAgree.doPhase(bobPair.getPublic(), true);

        KeyAgreement bobKeyAgree = KeyAgreement.getInstance("DH");
        bobKeyAgree.init(bobPair.getPrivate());
        bobKeyAgree.doPhase(alicePair.getPublic(), true);

        byte[] aliceSecret = aliceKeyAgree.generateSecret();
        byte[] bobSecret = bobKeyAgree.generateSecret();

        System.out.println("Alice's shared secret: " + new String(aliceSecret));
        System.out.println("Bob's shared secret: " + new String(bobSecret));
    }
}