const cryptoJs = require('crypto-js')

let s = cryptoJs.SHA1(cryptoJs.enc.Utf8.parse("tSdGtmwh49BcR1irt18mxG41dGsBuGKS"))
    , a = cryptoJs.enc.Hex.parse(s.toString(cryptoJs.enc.Hex).substr(0, 32));

function h(t) {
    let e = (i = t = String(t),
        o = cryptoJs.enc.Base64.parse(i),
        r = a,
        cryptoJs.AES.decrypt({
            ciphertext: o
        }, r, {
            mode: cryptoJs.mode.ECB,
            padding: cryptoJs.pad.Pkcs7
        }).toString(cryptoJs.enc.Utf8));
    var i, o, r;
    return JSON.parse(e)
}

var data = "密文数据"
console.log(h(data))