code: def _cert_details(cert_pointer):
      
  
      data_pointer = None
  
      try:
          data_pointer = Security.SecCertificateCopyData(cert_pointer)
          der_cert = CFHelpers.cf_data_to_bytes(data_pointer)
          cert_hash = hashlib.sha1(der_cert).digest()
  
          return (der_cert, cert_hash)
  
      finally:
          if data_pointer is not None:
              CoreFoundation.CFRelease(data_pointer)
docs: Return the certificate and a hash of it
  
      :param cert_pointer:
          A SecCertificateRef
  
      :return:
          A 2-element tuple:
           - [0]: A byte string of the SHA1 hash of the cert
           - [1]: A byte string of the DER-encoded contents of the cert