class Curl::Easy

def cert=(cert_file) 

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