text: """General key class."""
  
  import sys
  
  AUTOGEN_MESSAGE = "/* Autogenerated by imgtool.py, do not edit. */"
  
  class KeyClass(object):
      def _public_emit(self, header, trailer, indent, file=sys.stdout, len_format=None):
          print(AUTOGEN_MESSAGE, file=file)
          print(header, end='', file=file)
          encoded = self.get_public_bytes()
          for count, b in enumerate(encoded):
              if count % 8 == 0:
                  print("\n" + indent, end='', file=file)
              else:
                  print(" ", end='', file=file)
              print("0x{:02x},".format(b), end='', file=file)
          print("\n" + trailer, file=file)
          if len_format is not None:
              print(len_format.format(len(encoded)), file=file)
  
      def emit_c(self, file=sys.stdout):
          self._public_emit(
                  header="const unsigned char {}_pub_key[] = {{".format(self.shortname()),
                  trailer="};",
                  indent="    ",
                  len_format="const unsigned int {}_pub_key_len = {{}};".format(self.shortname()),
                  file=file)
  
      def emit_rust(self, file=sys.stdout):
          self._public_emit(
                  header="static {}_PUB_KEY: &'static [u8] = &[".format(self.shortname().upper()),
                  trailer="];",
                  indent="    ",
                  file=file)
  