RSA加解密方式以及生成RSA密钥对方式

大家好，欢迎来到IT知识分享网。

RSA加解密方式以及生成RSA密钥对方式

前端实现

实例demo

1、修改前端login.js对密码进行rsa加密。

import JSEncrypt from 'jsencrypt'; 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<br> * 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<br> * 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<br> * 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<br> * 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; } }