# frozen_string_literal: true
##
# The WebauthnPoller class retrieves an OTP after a user successfully WebAuthns. An instance
# polls the Gem host for the OTP code. The polling request (api/v1/webauthn_verification/<webauthn_token>/status.json)
# is sent to the Gem host every 5 seconds and will timeout after 5 minutes. If the status field in the json response
# is "success", the code field will contain the OTP code.
#
# Example usage:
#
# thread = Gem::WebauthnPoller.poll_thread(
# {},
# "RubyGems.org",
# "https://rubygems.org/api/v1/webauthn_verification/odow34b93t6aPCdY",
# { email: "email@example.com", password: "password" }
# )
# thread.join
# otp = thread[:otp]
# error = thread[:error]
#
module Gem::GemcutterUtilities
class WebauthnPoller
include Gem::GemcutterUtilities
TIMEOUT_IN_SECONDS = 300
attr_reader :options, :host
def initialize(options, host)
@options = options
@host = host
end
def self.poll_thread(options, host, webauthn_url, credentials)
Thread.new do
thread = Thread.current
thread.abort_on_exception = true
thread.report_on_exception = false
thread[:otp] = new(options, host).poll_for_otp(webauthn_url, credentials)
rescue Gem::WebauthnVerificationError, Gem::Timeout::Error => e
thread[:error] = e
end
end
def poll_for_otp(webauthn_url, credentials)
Gem::Timeout.timeout(TIMEOUT_IN_SECONDS) do
loop do
response = webauthn_verification_poll_response(webauthn_url, credentials)
raise Gem::WebauthnVerificationError, response.message unless response.is_a?(Gem::Net::HTTPSuccess)
require "json"
parsed_response = JSON.parse(response.body)
case parsed_response["status"]
when "pending"
sleep 5
when "success"
return parsed_response["code"]
else
raise Gem::WebauthnVerificationError, parsed_response.fetch("message", "Invalid response from server")
end
end
end
end
private
def webauthn_verification_poll_response(webauthn_url, credentials)
webauthn_token = %r{(?<=\/)[^\/]+(?=$)}.match(webauthn_url)[0]
rubygems_api_request(:get, "api/v1/webauthn_verification/#{webauthn_token}/status.json") do |request|
if credentials.empty?
request.add_field "Authorization", api_key
elsif credentials[:identifier] && credentials[:password]
request.basic_auth credentials[:identifier], credentials[:password]
else
raise Gem::WebauthnVerificationError, "Provided missing credentials"
end
end
end
end
end
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