Contents

# typed: ignore

# Copyright (c) 2015 Sqreen. All Rights Reserved.
# Please refer to our terms for more information: https://www.sqreen.com/terms.html

require 'sqreen/trie'
require 'sqreen/prefix'

require 'sqreen/rules/rule_cb'

module Sqreen
  module Rules
    # Looks for a blacklisted ip and block
    class BlacklistIPsCB < RuleCB
      def initialize(klass, method, rule_hash)
        super(klass, method, rule_hash)
        @trie_v4 = Sqreen::Trie.new
        @trie_v6 = Sqreen::Trie.new(nil, nil, Socket::AF_INET6)
        insert_values(@data['values'])
      end

      def pre(_inst, _args, _budget = nil, &_block)
        return unless framework
        ip = framework.client_ip
        return unless ip
        found = find_blacklisted_ip(ip)
        return unless found
        Sqreen.log.debug { "Found blacklisted IP #{ip} - found: #{found}" }
        record_observation('blacklisted', found, 1)
        advise_action(:raise, :skip_rem_cbs => true)
      end

      private

      def insert_values(ranges)
        Sqreen.log.info 'no ips given for IP blacklisting' if ranges.empty?

        ranges.map { |r| Prefix.from_str(r, r) }.each do |prefix|
          trie_for(prefix).insert prefix
        end
      end

      def trie_for(prefix)
        prefix.family == Socket::AF_INET6 ? @trie_v6 : @trie_v4
      end

      # Is this a blacklisted ip?
      # return the ip blacklisted range that match ip
      def find_blacklisted_ip(rip)
        begin
          ipa = IPAddr.new(rip)
        rescue StandardError
          Sqreen.log.info "invalid IP address given by framework: #{rip}"
          return nil
        end

        range = trie_for(ipa).search_best(ipa.to_i, ipa.family)
        return nil unless range
        range.data
      end
    end
  end
end

Version data entries

18 entries across 18 versions & 1 rubygems

Version	Path
sqreen-1.19.4	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.3	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.2	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.21.0.beta2	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.21.0.beta1	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.1-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.1	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.0-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.20.0	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.3-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.3	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.2-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.2	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.1-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.1	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.0-java	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.0	lib/sqreen/rules/blacklist_ips_cb.rb
sqreen-1.19.0.beta1	lib/sqreen/rules/blacklist_ips_cb.rb