require 'openssl'
require 'base64'

module WampClient
  module Auth
    module Cra

      # Generates the signature from the challenge
      # @param key [String]
      # @param challenge [String]
      def self.sign(key, challenge)
        hash  = OpenSSL::HMAC.digest('sha256', key, challenge)
        Base64.encode64(hash).gsub(/\n/,'')
      end

    end
  end
end