All files / lib/middlewares csrfVerify.ts

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import Crowi from 'server/crowi'
import Debug from 'debug'
 
const debug = Debug('crowi:middlewares:csrfVerify')
 
export default (crowi: Crowi) => {
  return (req, res, next) => {
    const token = req.body._csrf || req.query._csrf || null
    const csrfKey = (req.session && req.session.id) || 'anon'
 
    debug('req.skipCsrfVerify', req.skipCsrfVerify)
    if (req.skipCsrfVerify) {
      debug('csrf verify skipped')
      return next()
    }
 
    if (crowi.getTokens().verify(csrfKey, token)) {
      return next()
    }
 
    debug('csrf verification failed. return 403', csrfKey, token)
    return res.sendStatus(403)
  }
}