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# frozen_string_literal: true
require 'json'
require 'net/http'
require 'uri'
require 'recaptcha/configuration'
require 'recaptcha/helpers'
require 'recaptcha/adapters/controller_methods'
require 'recaptcha/adapters/view_methods'
if defined?(Rails)
require 'recaptcha/railtie'
end
module Recaptcha
DEFAULT_TIMEOUT = 3
class RecaptchaError < StandardError
end
class VerifyError < RecaptchaError
end
# Gives access to the current Configuration.
def self.configuration
@configuration ||= Configuration.new
end
# Allows easy setting of multiple configuration options. See Configuration
# for all available options.
#--
# The temp assignment is only used to get a nicer rdoc. Feel free to remove
# this hack.
#++
def self.configure
config = configuration
yield(config)
end
def self.with_configuration(config)
original_config = {}
config.each do |key, value|
original_config[key] = configuration.send(key)
configuration.send("#{key}=", value)
end
yield if block_given?
ensure
original_config.each { |key, value| configuration.send("#{key}=", value) }
end
def self.skip_env?(env)
configuration.skip_verify_env.include?(env || configuration.default_env)
end
def self.invalid_response?(resp)
resp.empty? || resp.length > configuration.response_limit
end
def self.verify_via_api_call(response, options)
if Recaptcha.configuration.enterprise
verify_via_api_call_enterprise(response, options)
else
verify_via_api_call_free(response, options)
end
end
def self.verify_via_api_call_enterprise(response, options)
site_key = options.fetch(:site_key) { configuration.site_key! }
api_key = options.fetch(:enterprise_api_key) { configuration.enterprise_api_key! }
project_id = options.fetch(:enterprise_project_id) { configuration.enterprise_project_id! }
query_params = { 'key' => api_key }
body = { 'event' => { 'token' => response, 'siteKey' => site_key } }
body['event']['expectedAction'] = options[:action] if options.key?(:action)
body['event']['userIpAddress'] = options[:remote_ip] if options.key?(:remote_ip)
reply = api_verification_enterprise(query_params, body, project_id, timeout: options[:timeout])
score = reply.dig('riskAnalysis', 'score')
token_properties = reply['tokenProperties']
success = !token_properties.nil? &&
token_properties['valid'].to_s == 'true' &&
hostname_valid?(token_properties['hostname'], options[:hostname]) &&
action_valid?(token_properties['action'], options[:action]) &&
score_above_threshold?(score, options[:minimum_score]) &&
score_below_threshold?(score, options[:maximum_score])
if options[:with_reply] == true
[success, reply]
else
success
end
end
def self.verify_via_api_call_free(response, options)
secret_key = options.fetch(:secret_key) { configuration.secret_key! }
verify_hash = { 'secret' => secret_key, 'response' => response }
verify_hash['remoteip'] = options[:remote_ip] if options.key?(:remote_ip)
reply = api_verification_free(verify_hash, timeout: options[:timeout])
success = reply['success'].to_s == 'true' &&
hostname_valid?(reply['hostname'], options[:hostname]) &&
action_valid?(reply['action'], options[:action]) &&
score_above_threshold?(reply['score'], options[:minimum_score]) &&
score_below_threshold?(reply['score'], options[:maximum_score])
if options[:with_reply] == true
[success, reply]
else
success
end
end
def self.hostname_valid?(hostname, validation)
validation ||= configuration.hostname
case validation
when nil, FalseClass then true
when String then validation == hostname
else validation.call(hostname)
end
end
def self.action_valid?(action, expected_action)
case expected_action
when nil, FalseClass then true
else action == expected_action
end
end
def self.score_above_threshold?(score, minimum_score)
!minimum_score || (score && score >= minimum_score)
end
def self.score_below_threshold?(score, maximum_score)
!maximum_score || (score && score <= maximum_score)
end
def self.http_client_for(uri:, timeout: nil)
timeout ||= DEFAULT_TIMEOUT
http = if configuration.proxy
proxy_server = URI.parse(configuration.proxy)
Net::HTTP::Proxy(proxy_server.host, proxy_server.port, proxy_server.user, proxy_server.password)
else
Net::HTTP
end
instance = http.new(uri.host, uri.port)
instance.read_timeout = instance.open_timeout = timeout
instance.use_ssl = true if uri.port == 443
instance
end
def self.api_verification_free(verify_hash, timeout: nil)
query = URI.encode_www_form(verify_hash)
uri = URI.parse("#{configuration.verify_url}?#{query}")
http_instance = http_client_for(uri: uri, timeout: timeout)
request = Net::HTTP::Get.new(uri.request_uri)
JSON.parse(http_instance.request(request).body)
end
def self.api_verification_enterprise(query_params, body, project_id, timeout: nil)
query = URI.encode_www_form(query_params)
uri = URI.parse("#{configuration.verify_url}/#{project_id}/assessments?#{query}")
http_instance = http_client_for(uri: uri, timeout: timeout)
request = Net::HTTP::Post.new(uri.request_uri)
request['Content-Type'] = 'application/json; charset=utf-8'
request.body = JSON.generate(body)
JSON.parse(http_instance.request(request).body)
end
end
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