使用Java创建Node.js加密密钥

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;

public class KeyPairGeneratorExample {
    public static void main(String[] args) {
        try {
            // 使用RSA算法生成密钥对
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
            keyPairGenerator.initialize(2048); // 设置密钥长度为2048位
            KeyPair keyPair = keyPairGenerator.generateKeyPair();
            
            // 获取公钥和私钥
            byte[] publicKey = keyPair.getPublic().getEncoded();
            byte[] privateKey = keyPair.getPrivate().getEncoded();
            
            // 将公钥和私钥保存到文件或数据库中，以便后续使用
            // ...
            
            System.out.println("密钥对生成成功！");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
}

import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.openssl.PEMWriter;

import java.io.FileWriter;
import java.io.IOException;
import java.security.KeyPair;
import java.security.PrivateKey;
import java.security.PublicKey;

public class PublicKeyExporter {
    public static void main(String[] args) {
        // 假设已经获取到公钥和私钥的字节数组
        byte[] publicKeyBytes = getPublicKeyBytes();
        byte[] privateKeyBytes = getPrivateKeyBytes();
        
        // 将公钥导出为PEM格式
        try (FileWriter fileWriter = new FileWriter("public_key.pem");
             PEMWriter pemWriter = new PEMWriter(fileWriter)) {
            SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfo.getInstance(publicKeyBytes);
            pemWriter.writeObject(publicKeyInfo);
            pemWriter.flush();
            
            System.out.println("公钥导出成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    private static byte[] getPublicKeyBytes() {
        // 从密钥对中获取公钥的字节数组
        // ...
        return new byte[0];
    }
    
    private static byte[] getPrivateKeyBytes() {
        // 从密钥对中获取私钥的字节数组
        // ...
        return new byte[0];
    }
}

const fs = require('fs');
const crypto = require('crypto');

// 加载公钥
const publicKey = fs.readFileSync('public_key.pem');

// 加密数据
const plaintext = 'Hello, World!';
const encryptedData = crypto.publicEncrypt(publicKey, Buffer.from(plaintext));

console.log('加密后的数据：', encryptedData.toString('base64'));