前后端密码加密

1 前端

安装crypto

npm install crypto-js

js工具

import CryptoJS from 'crypto-js/crypto-js'

/**
 * AES加密 ：字符串 key iv  返回base64
 */
export function Encrypt(word, keyStr) {
  let key,iv,ivStr;
  if (!keyStr) {
    throw new Error("keyStr 不能为空");
  }
  ivStr = keyStr;
  key = CryptoJS.enc.Utf8.parse(keyStr);
  iv = CryptoJS.enc.Utf8.parse(ivStr);
  let srcs = CryptoJS.enc.Utf8.parse(word);
  var encrypted = CryptoJS.AES.encrypt(srcs, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.ZeroPadding
  });
  // console.log("-=-=-=-", encrypted.ciphertext)
  return CryptoJS.enc.Base64.stringify(encrypted.ciphertext);

}
/**
 * AES 解密 ：字符串 key iv  返回base64
 */
export function Decrypt(word, keyStr) {

  let key,iv,ivStr;
  if (!keyStr) {
    throw new Error("keyStr 不能为空");
  }
  ivStr = keyStr;
  key = CryptoJS.enc.Utf8.parse(keyStr);
  iv = CryptoJS.enc.Utf8.parse(ivStr);

  let base64 = CryptoJS.enc.Base64.parse(word);
  let src = CryptoJS.enc.Base64.stringify(base64);

  var decrypt = CryptoJS.AES.decrypt(src, key, {
    iv: iv,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.ZeroPadding
  });

  var decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
  return decryptedStr.toString();
}

2 后端

public class AesUtil {
    /**
     * 加密方法
     * @param data  要加密的数据
     * @param key 加密key
     * @return 加密的结果
     * @throws Exception
     */
    public static String encrypt(String data, String key){
        try {
            String iv = key;
            //"算法/模式/补码方式"NoPadding PkcsPadding
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            int blockSize = cipher.getBlockSize();

            byte[] dataBytes = data.getBytes();
            int plaintextLength = dataBytes.length;
            if (plaintextLength % blockSize != 0) {
                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
            }

            byte[] plaintext = new byte[plaintextLength];
            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
            byte[] encrypted = cipher.doFinal(plaintext);

            return new Base64().encodeToString(encrypted);

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

    /**
     * 解密方法
     * @param data 要解密的数据
     * @param key  解密key
     * @return 解密的结果
     * @throws Exception
     */
    public static String desEncrypt(String data, String key) {
        try {
            String iv = key;
            byte[] encrypted1 = new Base64().decode(data);
            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());

            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);

            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original, "utf-8");
            return originalString;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }


    /**
     * 生成默认的 key 和 iv,key = iv iv 的长度必须是16位
     **/
    public static String generateKeyAndIv(){
        String uid = SecureUtil.md5(String.valueOf(System.currentTimeMillis()));
        // 盐加密
        String salt = UUID.randomUUID().toString();
        uid = SecureUtil.md5(uid + salt);
        return uid.substring(16);
    }
}

3 使用

前端发送请求时使用工具加密字段

import {Encrypt} from "@/utils/aesUtil";
//密码16位，前后端保持一致
let key = "aaaaaaaaaaaaaaaa"
let psw = Encrypt(password.trim(),key)

后端解析

String psw = AesUtil.desEncrypt(password, "aaaaaaaaaaaaaaaa");