mirror of
https://github.com/mastodon/mastodon.git
synced 2024-11-23 13:05:12 +01:00
8d217d7231
* Increase DNS timeout from 1 second to 5 seconds for MX check 1 seconds is rather short when using a recursive DNS resolver which hasn't got a cached result already available. Use 5 seconds instead, which is the timeout value we use for outgoing HTTP queries. * Add more precise error messages for invalid e-mail addresses
55 lines
1.3 KiB
Ruby
55 lines
1.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'resolv'
|
|
|
|
class EmailMxValidator < ActiveModel::Validator
|
|
def validate(user)
|
|
domain = get_domain(user.email)
|
|
|
|
if domain.nil?
|
|
user.errors.add(:email, I18n.t('users.invalid_email'))
|
|
else
|
|
ips, hostnames = resolve_mx(domain)
|
|
if ips.empty?
|
|
user.errors.add(:email, I18n.t('users.invalid_email_mx'))
|
|
elsif on_blacklist?(hostnames + ips)
|
|
user.errors.add(:email, I18n.t('users.blocked_email_provider'))
|
|
end
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def get_domain(value)
|
|
_, domain = value.split('@', 2)
|
|
|
|
return nil if domain.nil?
|
|
|
|
TagManager.instance.normalize_domain(domain)
|
|
rescue Addressable::URI::InvalidURIError
|
|
nil
|
|
end
|
|
|
|
def resolve_mx(domain)
|
|
hostnames = []
|
|
ips = []
|
|
|
|
Resolv::DNS.open do |dns|
|
|
dns.timeouts = 5
|
|
|
|
hostnames = dns.getresources(domain, Resolv::DNS::Resource::IN::MX).to_a.map { |e| e.exchange.to_s }
|
|
|
|
([domain] + hostnames).uniq.each do |hostname|
|
|
ips.concat(dns.getresources(hostname, Resolv::DNS::Resource::IN::A).to_a.map { |e| e.address.to_s })
|
|
ips.concat(dns.getresources(hostname, Resolv::DNS::Resource::IN::AAAA).to_a.map { |e| e.address.to_s })
|
|
end
|
|
end
|
|
|
|
[ips, hostnames]
|
|
end
|
|
|
|
def on_blacklist?(values)
|
|
EmailDomainBlock.where(domain: values.uniq).any?
|
|
end
|
|
end
|