# File lib/curb.rb, line 55
    def cert=(cert_file)
      pos = cert_file.rindex(':')
      if pos && pos > 1
        self.native_cert= cert_file[0..pos-1]
        self.certpassword= cert_file[pos+1..-1]
      else
        self.native_cert= cert_file
      end
      self.cert
    end