crypto-js解密报错malformed utf-8 data_malformed utf-8 data at object.stringify

在使用crypto-js进行解密的时候，有可能会报错：

Malformed UTF-8 data
Error: Malformed UTF-8 data
    at Object.stringify (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto-js.js:478:27)
    at WordArray.init.toString (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto-js.js:215:41)
    at decryptByDESModeCBC (d:\StudeyCode\myStudy\encryptDemo\routes\encrypt\crypto.js:90:22)
    at testSign (d:\StudeyCode\myStudy\encryptDemo\routes\test.js:34:18)
    at Layer.handle [as handle_request] (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\layer.js:95:5)
    at next (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\layer.js:95:5)
    at d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\index.js:281:22
    at Function.process_params (d:\StudeyCode\myStudy\encryptDemo\node_modules\express\lib\router\index.js:335:12)
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报错的原因是： des解密时,如果加密数据不是8的整数倍就会报上述错误，
解决办法：将数据加密后，再进行base64进行加密,解密时首先通过base64进行解密，然后再进行des解密。即可解决上述问题。