vue3封装AES(CryptoJS)前端加密解密通信代码实现

npm install crypto-js

import CryptoJS from 'crypto-js/crypto-js';
const key = CryptoJS.enc.Utf8.parse('123321'); // 密钥 后端提供
const iv = CryptoJS.enc.Utf8.parse(''); // 偏移量
/**
 * AES加密 ：字符串 key iv  返回base64
 */
export function Encrypt(word) {
  const srcs = CryptoJS.enc.Utf8.parse(word);
  const encrypted = CryptoJS.AES.encrypt(srcs, key, {
    iv: iv,
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7,
  });
  return CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
}

/**
 * AES 解密 ：字符串 key iv  返回base64
 *  */
export function Decrypt(word) {
  const base64 = CryptoJS.enc.Base64.parse(word);
  const src = CryptoJS.enc.Base64.stringify(base64);

  const decrypt = CryptoJS.AES.decrypt(src, key, {
    iv: iv,
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7,
  });
  return CryptoJS.enc.Utf8.stringify(decrypt);
}

// 引入
import { Encrypt, Decrypt } from '/@/utils/secret';

this.axiosInstance.interceptors.request.use((config: AxiosRequestConfig) => {
      // If cancel repeat request is turned on, then cancel repeat request is prohibited
      // @ts-ignore
      const { ignoreCancelToken } = config.requestOptions;
      const ignoreCancel =
        ignoreCancelToken !== undefined
          ? ignoreCancelToken
          : this.options.requestOptions?.ignoreCancelToken;

      !ignoreCancel && axiosCanceler.addPending(config);
      if (requestInterceptors && isFunction(requestInterceptors)) {
        config = requestInterceptors(config, this.options);
      }
       // 关键代码：
       // JSON加密，formData不加密（对需要处理的数据格式做判断）
       if (Object.prototype.toString.call(config.data) != '[object FormData]') {
         config.data = { encryptedData: Encrypt(JSON.stringify(config.data)) }; // 加密传参，后端要求的传参：encryptedData：加密参数
       }
      return config;
    }, undefined);

this.axiosInstance.interceptors.response.use(async (res: AxiosResponse<any>) => {
	  // 关键代码：
      // 导出时数据格式为blob不解密（对需要处理的数据格式做判断）
      if (Object.prototype.toString.call(res.data) != '[object Blob]') {
        res.data = JSON.parse(Decrypt(res.data)); // 解密返回参数
      }
      const config = res.config;
      if (res.data.code === 401) {
        // 如果未认证，并且未进行刷新令牌，说明可能是访问令牌过期了
        if (!isRefreshToken) {
          isRefreshToken = true;
          // 1. 获取到刷新token
          if (getRefreshToken()) {
            // 2. 进行刷新访问令牌
            try {
              const refreshTokenRes = await this.refreshToken();
              // 2.1 刷新成功，则回放队列的请求 + 当前请求
              setToken('Bearer ' + refreshTokenRes.data.data.accessToken);
              (config as Recordable).headers.Authorization = getToken();
              requestList.forEach((cb: any) => {
                cb();
              });
              requestList = [];
              return new Promise((resolve) => {
                resolve(this.axiosInstance(config));
              });
              // res = await Promise.all([this.axiosInstance(config)])[0]
            } catch (e) {
              requestList.forEach((cb: any) => {
                cb();
              });
            } finally {
              requestList = [];
              isRefreshToken = false;
            }
          }
        } else {
          // 添加到队列，等待刷新获取到新的令牌
          return new Promise((resolve) => {
            requestList.push(() => {
              (config as Recordable).headers.Authorization = getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
              resolve(this.axiosInstance(config));
            });
          });
        }
      }
      res && axiosCanceler.removePending(res.config);
      if (responseInterceptors && isFunction(responseInterceptors)) {
        res = responseInterceptors(res);
      }
      return res;
    }, undefined);