express-template/utils/auth.js

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const isJSON = require('is-json')
const CryptoJS = require('crypto-js')
const keyHex = process.env.AES
function encode (payload, timestamp = 0) {
const data = {
payload,
expired_timestamp: timestamp ? timestamp + Date.now() : 0,
}
const messageHex = CryptoJS.enc.Utf8.parse(JSON.stringify(data))
var encrypted = CryptoJS.AES.encrypt(messageHex, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7,
})
return encrypted.toString()
}
function decode (encrypted) {
const errmsg = '登录凭证无效'
try{
var decrypt = CryptoJS.enc.Utf8.stringify(
CryptoJS.AES.decrypt(encrypted, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7,
}),
)
}catch(err) {
throw new Error(errmsg)
}
if(!isJSON(decrypt)) {
throw new Error(errmsg)
}
var payload = JSON.parse(decrypt)
if (!payload.payload) {
throw new Error(errmsg)
}
if (Date.now() >= payload.expired_timestamp) {
throw new Error('登录凭证已过期')
}
return payload.payload
}
module.exports = {
encode,
decode
}