# File lib/json/jws.rb, line 21
    def verify!(public_key_or_secret, algorithms = nil)
      if alg.try(:to_sym) == :none
        raise UnexpectedAlgorithm if public_key_or_secret
        signature == '' or raise VerificationFailed
      elsif algorithms.blank? || Array(algorithms).include?(alg.try(:to_sym))
        public_key_or_secret && valid?(public_key_or_secret) or
        raise VerificationFailed
      else
        raise UnexpectedAlgorithm.new('Unexpected alg header')
      end
    end