RSA加密 MD5加密

import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

public class RSAEncrypt {
	private static Map<Integer, String> keyMap = new HashMap<Integer, String>();  //用于封装随机产生的公钥与私钥
    public static void main(String[] args) throws Exception {
        //生成公钥和私钥
        genKeyPair();
        //加密字符串
        String message = "df723820";
        System.out.println("随机生成的公钥为:" + keyMap.get(0));
        System.out.println("随机生成的私钥为:" + keyMap.get(1));
        String messageEn = encrypt(message,keyMap.get(0));
        System.out.println(message + "\t加密后的字符串为:" + messageEn);
        String messageDe = decrypt(messageEn,keyMap.get(1));
        System.out.println("还原后的字符串为:" + messageDe);
    }
    /**
     * 随机生成密钥对
     * @throws NoSuchAlgorithmException
     */
    public static void genKeyPair() throws NoSuchAlgorithmException {
        // KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
        // 初始化密钥对生成器，密钥大小为96-1024位
        keyPairGen.initialize(1024,new SecureRandom());
        // 生成一个密钥对，保存在keyPair中
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();   // 得到私钥
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  // 得到公钥
        String publicKeyString = new String(Base64.encodeBase64(publicKey.getEncoded()));
        // 得到私钥字符串
        String privateKeyString = new String(Base64.encodeBase64((privateKey.getEncoded())));
        // 将公钥和私钥保存到Map
        keyMap.put(0,publicKeyString);  //0表示公钥
        keyMap.put(1,privateKeyString);  //1表示私钥
    }
    /**
     * RSA公钥加密
     *
     * @param str
     *            加密字符串
     * @param publicKey
     *            公钥
     * @return 密文
     * @throws Exception
     *             加密过程中的异常信息
     */
    public static String encrypt( String str, String publicKey ) throws Exception{
        //base64编码的公钥
        byte[] decoded = Base64.decodeBase64(publicKey);
        RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
        //RSA加密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
        return outStr;
    }

    /**
     * RSA私钥解密
     *
     * @param str
     *            加密字符串
     * @param privateKey
     *            私钥
     * @return 铭文
     * @throws Exception
     *             解密过程中的异常信息
     */
    public static String decrypt(String str, String privateKey) throws Exception{
        //64位解码加密后的字符串
        byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
        //base64编码的私钥
        byte[] decoded = Base64.decodeBase64(privateKey);
        RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
        //RSA解密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, priKey);
        String outStr = new String(cipher.doFinal(inputByte));
        return outStr;
    }

}

/**
    * @auther fuxd on 2020/3/16 0016
    * @description md5密码加密
    * @param 
    * @return 
    */
    public static String encodeByMd5(String encodeText){
        try {
            //创建md5的加密方式
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            //使用md5方式对输入值进行加密
            byte[] encodeData = messageDigest.digest(encodeText.getBytes("utf-8"));
            //使用BASE64Encoder的encode方法，把字节数组转成字符串
            String result = new BASE64Encoder().encode(encodeData);

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

　　

 前端rsa加密

应用js，注意：由于ie浏览器的js编译规则比较强，在引入js包的时候要引入ie兼容的js

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>使用jsencrypt执行OpenSSL的RSA加密，解密</title>
    </head>
    <!--引入jsencrypt.js-->
    <script src="https://cdn.bootcss.com/jsencrypt/3.0.0-beta.1/jsencrypt.js"></script>//ie应该应用ie兼容的js，此js不是ie兼容的
    <script type="text/javascript">
        //公钥
        var PUBLIC_KEY = 'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8HMr2CBpoZPm3t9tCVlrKtTmI4jNJc7/HhxjIEiDjC8czP4PV+44LjXvLYcSV0fwi6nE4LH2c5PBPEnPfqp0g8TZeX+bYGvd70cXee9d8wHgBqi4k0J0X33c0ZnW7JruftPyvJo9OelYSofBXQTcwI+3uIl/YvrgQRv6A5mW01QIDAQAB';
        //私钥
        var PRIVATE_KEY = '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';
        //使用公钥加密
        var encrypt = new JSEncrypt();
		  //encrypt.setPrivateKey('-----BEGIN RSA PRIVATE KEY-----'+PRIVATE_KEY+'-----END RSA PRIVATE KEY-----');
        encrypt.setPublicKey('-----BEGIN PUBLIC KEY-----' + PUBLIC_KEY + '-----END PUBLIC KEY-----');
        var encrypted = encrypt.encrypt('ceshi01');
        console.log('加密后数据:%o', encrypted);
        //使用私钥解密
        var decrypt = new JSEncrypt();
		//decrypt.setPublicKey('-----BEGIN PUBLIC KEY-----' + PUBLIC_KEY + '-----END PUBLIC KEY-----');
        decrypt.setPrivateKey('-----BEGIN RSA PRIVATE KEY-----'+PRIVATE_KEY+'-----END RSA PRIVATE KEY-----');
        var uncrypted = decrypt.decrypt(encrypted);
        console.log('解密后数据:%o', uncrypted);
    </script>
 
</html>