server/helpers/signup.ts

   1 import { UserModel } from '../models/account/user'
   2 import * as ipaddr from 'ipaddr.js'
   3 import { CONFIG } from '../initializers/config'
   4
   5 const isCidr = require('is-cidr')
   6
   7 async function isSignupAllowed () {
   8   if (CONFIG.SIGNUP.ENABLED === false) {
   9     return false
  10   }
  11
  12   // No limit and signup is enabled
  13   if (CONFIG.SIGNUP.LIMIT === -1) {
  14     return true
  15   }
  16
  17   const totalUsers = await UserModel.countTotal()
  18
  19   return totalUsers < CONFIG.SIGNUP.LIMIT
  20 }
  21
  22 function isSignupAllowedForCurrentIP (ip: string) {
  23   const addr = ipaddr.parse(ip)
  24   let excludeList = [ 'blacklist' ]
  25   let matched = ''
  26
  27   // if there is a valid, non-empty whitelist, we exclude all unknown adresses too
  28   if (CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr(cidr)).length > 0) {
  29     excludeList.push('unknown')
  30   }
  31
  32   if (addr.kind() === 'ipv4') {
  33     const addrV4 = ipaddr.IPv4.parse(ip)
  34     const rangeList = {
  35       whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v4(cidr))
  36                        .map(cidr => ipaddr.IPv4.parseCIDR(cidr)),
  37       blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v4(cidr))
  38                        .map(cidr => ipaddr.IPv4.parseCIDR(cidr))
  39     }
  40     matched = ipaddr.subnetMatch(addrV4, rangeList, 'unknown')
  41   } else if (addr.kind() === 'ipv6') {
  42     const addrV6 = ipaddr.IPv6.parse(ip)
  43     const rangeList = {
  44       whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v6(cidr))
  45                        .map(cidr => ipaddr.IPv6.parseCIDR(cidr)),
  46       blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v6(cidr))
  47                        .map(cidr => ipaddr.IPv6.parseCIDR(cidr))
  48     }
  49     matched = ipaddr.subnetMatch(addrV6, rangeList, 'unknown')
  50   }
  51
  52   return !excludeList.includes(matched)
  53 }
  54
  55 // ---------------------------------------------------------------------------
  56
  57 export {
  58   isSignupAllowed,
  59   isSignupAllowedForCurrentIP
  60 }