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Copy pathcodeite-auth.js
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76 lines (59 loc) · 1.63 KB
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const crypto = require('crypto')
const moment = require('moment')
const rejector = res => reason => {
res.status(401).send({
status: 401,
reason
})
}
module.exports = (name, secret) => (req, res, next) => {
const cookieHeader = req.headers.cookie
const reject = rejector(res)
// req.userId = 'sam'
// return next()
if (!cookieHeader) {
return reject('no_cookies')
}
const cookies = cookieHeader
.split('; ')
.map(str => {
const [key, val] = str.split('=')
return {key, val: decodeURIComponent(val)}
})
const cookie = cookies.find(x => x.key === name)
if (!cookie) {
return reject('no_list_cookie')
}
const cookieValue = cookie.val
if (!cookieValue) {
return reject('no_list_cookie_value')
}
const [version, userId, created, sig] = cookieValue.split('|')
if (version !== 'v1') {
return reject('invalid_version')
}
let creationDate, validFrom
if (created.includes('P')) {
const [date, duration] = created.split('P')
creationDate = moment(date)
const dur = moment.duration('P'+duration)
validFrom = moment().subtract(dur)
} else {
creationDate = moment(created)
validFrom = moment().subtract(30, 'days')
}
const validTo = moment()
if (!creationDate.isBetween(validFrom, validTo)) {
return reject('expired_token')
}
const token = `v1|${userId}|${created}`
const hash = crypto
.createHmac('sha256', secret)
.update(token)
.digest('base64')
if (hash !== sig) {
return reject(`invalid_signature ${hash} !== ${sig}`)
}
req.userId = userId
return next()
}