1 import { IPv4, IPv6, parse, subnetMatch } from 'ipaddr.js'
2 import { CONFIG } from '../initializers/config'
3 import { UserModel } from '../models/user/user'
5 const isCidr = require('is-cidr')
7 async function isSignupAllowed (): Promise<{ allowed: boolean, errorMessage?: string }> {
8 if (CONFIG.SIGNUP.ENABLED === false) {
9 return { allowed: false }
12 // No limit and signup is enabled
13 if (CONFIG.SIGNUP.LIMIT === -1) {
14 return { allowed: true }
17 const totalUsers = await UserModel.countTotal()
19 return { allowed: totalUsers < CONFIG.SIGNUP.LIMIT }
22 function isSignupAllowedForCurrentIP (ip: string) {
25 const addr = parse(ip)
26 const excludeList = [ 'blacklist' ]
29 // if there is a valid, non-empty whitelist, we exclude all unknown addresses too
30 if (CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr(cidr)).length > 0) {
31 excludeList.push('unknown')
34 if (addr.kind() === 'ipv4') {
35 const addrV4 = IPv4.parse(ip)
37 whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v4(cidr))
38 .map(cidr => IPv4.parseCIDR(cidr)),
39 blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v4(cidr))
40 .map(cidr => IPv4.parseCIDR(cidr))
42 matched = subnetMatch(addrV4, rangeList, 'unknown')
43 } else if (addr.kind() === 'ipv6') {
44 const addrV6 = IPv6.parse(ip)
46 whitelist: CONFIG.SIGNUP.FILTERS.CIDR.WHITELIST.filter(cidr => isCidr.v6(cidr))
47 .map(cidr => IPv6.parseCIDR(cidr)),
48 blacklist: CONFIG.SIGNUP.FILTERS.CIDR.BLACKLIST.filter(cidr => isCidr.v6(cidr))
49 .map(cidr => IPv6.parseCIDR(cidr))
51 matched = subnetMatch(addrV6, rangeList, 'unknown')
54 return !excludeList.includes(matched)
57 // ---------------------------------------------------------------------------
61 isSignupAllowedForCurrentIP