docs: def _make_regex(pem_type):
      '''
      Dynamically generate a regex to match pem_type
      '''
      return re.compile(
          r"\s*(?P<pem_header>-----BEGIN {0}-----)\s+"
          r"(?:(?P<proc_type>Proc-Type: 4,ENCRYPTED)\s*)?"
          r"(?:(?P<dek_info>DEK-Info: (?:DES-[3A-Z\-]+,[0-9A-F]{{16}}|[0-9A-Z\-]+,[0-9A-F]{{32}}))\s*)?"
          r"(?P<pem_body>.+?)\s+(?P<pem_footer>"
          r"-----END {0}-----)\s*".format(pem_type),
          re.DOTALL
      )