# File lib/oauth2/mac_token.rb, line 97
    def algorithm=(alg)
      @algorithm = begin
        case alg.to_s
        when 'hmac-sha-1'
          OpenSSL::Digest::SHA1.new
        when 'hmac-sha-256'
          OpenSSL::Digest::SHA256.new
        else
          raise(ArgumentError, 'Unsupported algorithm')
        end
      end
    end