关于web项目前后端加密解密总结

2021-5-27 前端达人

首先项目是基于vue开发的项目

1、DES加密

前端

需要引入js

import cryptoJs from 'crypto-js'

// DES加密

export const encryptDes = (message, key) => {

return cryptoJs.DES.encrypt(message, cryptoJs.enc.Utf8.parse(key), {

mode: cryptoJs.mode.ECB,

padding: cryptoJs.pad.Pkcs7

}).toString()

}

后台

package com.huihui.until;

import java.security.SecureRandom;
import java.util.Scanner;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

import org.apache.commons.codec.binary.Base64;

/**
* 类说明：DES
* 
* 详细描述：
* @since 2019年3月31日下午17:00:16
*/
public class DESCryptUtil {

 private static final String DES = "DES";

 public static final String desKey = "ba54ee44";

public static String doEncrypt(String plainMessage, String hexDesKey) throws Exception {
 byte desKey[] = hexDesKey.getBytes();
 byte desPlainMsg[] = plainMessage.getBytes();
 return Base64.encodeBase64URLSafeString(desCrypt(desKey, desPlainMsg, Cipher.ENCRYPT_MODE));
 }
/**
* 获取解密后的字符串
* @param hexEncryptMessage
* @param hexDesKey
* @return
* @throws Exception
*/
public static String doDecrypt(String hexEncryptMessage, String hexDesKey) throws Exception{
 if (hexEncryptMessage == null) {
return null;
 }
 byte desKey[] = hexDesKey.getBytes();
 byte desPlainMsg[] = Base64.decodeBase64(hexEncryptMessage);
 return new String(desCrypt(desKey, desPlainMsg, Cipher.DECRYPT_MODE));
 }
/**
* 获取解密后的数组
* @param desPlainMsg
* @param hexDesKey
* @return
* @throws Exception
*/
public static byte[] doDecryptByte(byte[] desPlainMsg, String hexDesKey) throws Exception{
 if (desPlainMsg == null) {
return null;
 }
 byte desKey[] = hexDesKey.getBytes();
 return desCrypt(desKey, desPlainMsg, Cipher.DECRYPT_MODE);
 }

private static byte[] desCrypt(byte[] desKey, byte[] desPlainMsg, int CipherMode) throws Exception{
 try {
 SecureRandom sr = new SecureRandom();
 DESKeySpec dks = new DESKeySpec(desKey);
 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
 javax.crypto.SecretKey key = keyFactory.generateSecret(dks);
 Cipher cipher = Cipher.getInstance(DES);
 cipher.init(CipherMode, key, sr);
 return cipher.doFinal(desPlainMsg);
 } catch (Exception e) {
 String message = "";
 if (CipherMode == Cipher.ENCRYPT_MODE) {
 message = "DES\u52A0\u5BC6\u5931\u8D25";
 } else {
 message = "DES\u89E3\u5BC6\u5931\u8D25";
 }
 throw new Exception(message, e);
 }
 }
/**
* 获取8位的key
* @param str
* @return
*/
public static String processString(String str) {
 if(str==null||"".equals(str)) {
 return "";
 }
 StringBuilder sb = new StringBuilder();
 for(int i=0;i<8;i++) {
 int index = i<<2&(32-i);
 sb.append(str.charAt(index));
 }

 return sb.toString();
 }
public static void main(String[] args) throws Exception{
 DESCryptUtil se=new DESCryptUtil();
 for (int i = 0; i < 5; i++) {
 Scanner scanner=new Scanner(System.in);
 /*
 * 加密
 */
 System.out.println("请输入要加密的内容:");
 String content = scanner.next();
 System.out.println("加密后的密文是:"+se.doEncrypt(content, desKey));

 /*
 * 解密
 */
 System.out.println("请输入要解密的内容:");
 content = scanner.next();
 System.out.println("解密后的明文是:"+se.doDecrypt(content, desKey));
 }
}

}

2 RSA加密解密

这是我是在在线生成公钥私钥的网站中生成了自己的公钥私钥用来测试

前台

import JsEncrypt from 'jsencrypt'

// RSA加密

export function encryptRsa(publickey, message) {

const rsa = new JsEncrypt()

rsa.setPublicKey(publickey)

return rsa.encrypt(message)

}

后台

package com.huihui.until;

import org.apache.commons.codec.binary.Base64;

import com.googosoft.config.GlobalConstants;

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 RSAUtil {

 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";
//GlobalConstants.PUBLICKEY 公钥加密
 String messageEn = encrypt(message,GlobalConstants.PUBLICKEY);
 System.out.println(message + "\t加密后的字符串为:" + messageEn);

//GlobalConstants.PRIVATEKEY 私钥解密
       String messageDe = decrypt(messageEn,GlobalConstants.PRIVATEKEY);
       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;
   }