RSA加解密方式以及生成RSA密钥对方式

RSA加解密方式以及生成RSA密钥对方式

需要按照具体情况进行操作对于某些时候可能有相对改动
前端使用jsencrypt实现密码加密传输方式
Java后端使用hutool工具和原生两种方式对于RSA进行生成与加解密
目前登录接口密码是明文传输，如果安全性有要求，可以调整成加密方式传输。
参考如下如果只需要查看后端方式请点击目录或者下拉到下方查看

在线密钥对生成工具网站 http://web.chacuo.net/netrsakeypair

前端实现

实例demo

1、修改前端login.js对密码进行rsa加密。

const publicKey = 'MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKoR8mX0rGKLqzcWmOzbfj64K8ZIgOdH\n' +
  'nzkXSOVOZbFu/TJhZ7rFAN+eaGkl3C4buccQd/EjEsj9ir7ijT7h96MCAwEAAQ=='

// 加密
function encrypt(txt) {
  const encryptor = new JSEncrypt()
  encryptor.setPublicKey(publicKey) // 设置公钥
  return encryptor.encrypt(txt) // 对数据进行加密
}

js引入方式

2、引入jsencrypt插件

<script src="../static/js/jsencrypt.min.js" th:src="@{/js/jsencrypt.min.js}"><

vue引入方式

import { encrypt } from '@/utils/jsencrypt'

Java后端实现

集成hutool实现

3、后端现阶段使用集成hutool工具类,从而实现RSA加解密,在common模块的sign下添加RsaUtils.java，用于RSA加密解密。

package com.aries.common.utils;

import cn.hutool.crypto.asymmetric.KeyType;
import cn.hutool.crypto.asymmetric.RSA;
import com.aries.common.constant.RsaConstants;

import java.security.PrivateKey;
import java.security.PublicKey;

/**
 * @author 405
 * @Date 2021/6/23
 */
public class RsaUtil {

    /**
     * 类型
     */
    public static final String ENCRYPT_TYPE = "RSA";

    /**
     * 获取公钥的key
     */
    private static final String PUBLIC_KEY = "RSAPublicKey";

    /**
     * 获取私钥的key
     */
    private static final String PRIVATE_KEY = "RSAPrivateKey";

    /**
     * 公钥加密
     *
     * @param content:
     * @param publicKey:
     * @author: 405
     * @date: 2021/6/28
     * @return: java.lang.String
     */
    public static String encrypt(String content, PublicKey publicKey) {
        try {
            RSA rsa = new RSA(null, publicKey);
            return rsa.encryptBase64(content, KeyType.PublicKey);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 公钥加密
     *
     * @param content:
     * @param publicKey:
     * @author: 405
     * @date: 2021/6/28
     * @return: java.lang.String
     */
    public static String encrypt(String content, String publicKey) {
        try {
            RSA rsa = new RSA(null, publicKey);
            return rsa.encryptBase64(content, KeyType.PublicKey);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 私钥解密
     *
     * @param content:
     * @param privateKey:
     * @author: 405
     * @date: 2021/6/28
     * @return: java.lang.String
     */
    public static String decrypt(String content, PrivateKey privateKey) {
        try {
            RSA rsa = new RSA(privateKey, null);
            return rsa.decryptStr(content, KeyType.PrivateKey);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 私钥解密
     *
     * @param content:
     * @param privateKey:
     * @author: 405
     * @date: 2021/6/28
     * @return: java.lang.String
     */
    public static String decrypt(String content, String privateKey) {
        try {
            RSA rsa = new RSA(privateKey, null);
            return rsa.decryptStr(content, KeyType.PrivateKey);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

     /**
     * 获取公私钥-请获取一次后保存公私钥使用
     * @return
     */
    public static Map<String,String> generateKeyPair() {
        try {
            KeyPair pair = SecureUtil.generateKeyPair(ENCRYPT_TYPE);
            PrivateKey privateKey = pair.getPrivate();
            PublicKey publicKey = pair.getPublic();
            // 获取 公钥和私钥 的 编码格式（通过该 编码格式 可以反过来 生成公钥和私钥对象）
            byte[] pubEncBytes = publicKey.getEncoded();
            byte[] priEncBytes = privateKey.getEncoded();

            // 把 公钥和私钥 的 编码格式 转换为 Base64文本 方便保存
            String pubEncBase64 = new BASE64Encoder().encode(pubEncBytes);
            String priEncBase64 = new BASE64Encoder().encode(priEncBytes);

            Map<String, String> map = new HashMap<String, String>(2);
            map.put(PUBLIC_KEY,pubEncBase64);
            map.put(PRIVATE_KEY,priEncBase64);

            return map;
        } catch (Exception e){
            e.printStackTrace();
        }
        return null;
    }
}

非集成hutool实现

非依赖hutool方式

import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import java.security.*;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;
 
/**
 * Created by humf.需要依赖 commons-codec 包 
 */
public class RSACoder {
    public static final String KEY_ALGORITHM = "RSA";
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
 
    private static final String PUBLIC_KEY = "RSAPublicKey";
    private static final String PRIVATE_KEY = "RSAPrivateKey";
 
    public static byte[] decryptBASE64(String key) {
        return Base64.decodeBase64(key);
    }
 
    public static String encryptBASE64(byte[] bytes) {
        return Base64.encodeBase64String(bytes);
    }
 
    /**
     * 用私钥对信息生成数字签名
     *
     * @param data       加密数据
     * @param privateKey 私钥
     * @return
     * @throws Exception
     */
    public static String sign(byte[] data, String privateKey) throws Exception {
        // 解密由base64编码的私钥
        byte[] keyBytes = decryptBASE64(privateKey);
        // 构造PKCS8EncodedKeySpec对象
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        // KEY_ALGORITHM 指定的加密算法
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        // 取私钥匙对象
        PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);
        // 用私钥对信息生成数字签名
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initSign(priKey);
        signature.update(data);
        return encryptBASE64(signature.sign());
    }
 
    /**
     * 校验数字签名
     *
     * @param data      加密数据
     * @param publicKey 公钥
     * @param sign      数字签名
     * @return 校验成功返回true 失败返回false
     * @throws Exception
     */
    public static boolean verify(byte[] data, String publicKey, String sign)
            throws Exception {
        // 解密由base64编码的公钥
        byte[] keyBytes = decryptBASE64(publicKey);
        // 构造X509EncodedKeySpec对象
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        // KEY_ALGORITHM 指定的加密算法
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        // 取公钥匙对象
        PublicKey pubKey = keyFactory.generatePublic(keySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initVerify(pubKey);
        signature.update(data);
        // 验证签名是否正常
        return signature.verify(decryptBASE64(sign));
    }
 
    public static byte[] decryptByPrivateKey(byte[] data, String key) throws Exception{
        // 对密钥解密
        byte[] keyBytes = decryptBASE64(key);
        // 取得私钥
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
        // 对数据解密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        return cipher.doFinal(data);
    }
 
    /**
     * 解密

     * 用私钥解密
     *
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPrivateKey(String data, String key)
            throws Exception {
        return decryptByPrivateKey(decryptBASE64(data),key);
    }
 
    /**
     * 解密

     * 用公钥解密
     *
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPublicKey(byte[] data, String key)
            throws Exception {
        // 对密钥解密
        byte[] keyBytes = decryptBASE64(key);
        // 取得公钥
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicKey = keyFactory.generatePublic(x509KeySpec);
        // 对数据解密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicKey);
        return cipher.doFinal(data);
    }
 
    /**
     * 加密

     * 用公钥加密
     *
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPublicKey(String data, String key)
            throws Exception {
        // 对公钥解密
        byte[] keyBytes = decryptBASE64(key);
        // 取得公钥
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicKey = keyFactory.generatePublic(x509KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        return cipher.doFinal(data.getBytes());
    }
 
    /**
     * 加密

     * 用私钥加密
     *
     * @param data
     * @param key
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPrivateKey(byte[] data, String key)
            throws Exception {
        // 对密钥解密
        byte[] keyBytes = decryptBASE64(key);
        // 取得私钥
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
        // 对数据加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, privateKey);
        return cipher.doFinal(data);
    }
 
    /**
     * 取得私钥
     *
     * @param keyMap
     * @return
     * @throws Exception
     */
    public static String getPrivateKey(Map<String, Key> keyMap)
            throws Exception {
        Key key = (Key) keyMap.get(PRIVATE_KEY);
        return encryptBASE64(key.getEncoded());
    }
 
    /**
     * 取得公钥
     *
     * @param keyMap
     * @return
     * @throws Exception
     */
    public static String getPublicKey(Map<String, Key> keyMap)
            throws Exception {
        Key key = keyMap.get(PUBLIC_KEY);
        return encryptBASE64(key.getEncoded());
    }
 
    /**
     * 初始化密钥
     *
     * @return
     * @throws Exception
     */
    public static Map<String, Key> initKey() throws Exception {
        KeyPairGenerator keyPairGen = KeyPairGenerator
                .getInstance(KEY_ALGORITHM);
        keyPairGen.initialize(1024);
        KeyPair keyPair = keyPairGen.generateKeyPair();
        Map<String, Key> keyMap = new HashMap(2);
        keyMap.put(PUBLIC_KEY, keyPair.getPublic());// 公钥
        keyMap.put(PRIVATE_KEY, keyPair.getPrivate());// 私钥
        return keyMap;
    }
}