Method message_to_binary

opcua/common/connection.py:231–244

Convert OPC UA secure message to binary. The only supported types are SecureOpen, SecureMessage, SecureClose if message_type is SecureMessage, the AlgoritmHeader should be passed as arg

(self, message, message_type=ua.MessageType.SecureMessage, request_id=0)

        self.security_policy.make_local_symmetric_key(self.remote_nonce, self.local_nonce)

    def message_to_binary(self, message, message_type=ua.MessageType.SecureMessage, request_id=0):
        """
        Convert OPC UA secure message to binary.
        The only supported types are SecureOpen, SecureMessage, SecureClose
        if message_type is SecureMessage, the AlgoritmHeader should be passed as arg
        """
        chunks = MessageChunk.message_to_chunks(self.security_policy, message, self._max_chunk_size, message_type=message_type, channel_id=self.security_token.ChannelId, request_id=request_id, token_id=self.security_token.TokenId)
        for chunk in chunks:
            self._sequence_number += 1
            if self._sequence_number >= (1 << 32):
                logger.debug("Wrapping sequence number: %d -> 1", self._sequence_number)
                self._sequence_number = 1
            chunk.SequenceHeader.SequenceNumber = self._sequence_number
        return b"".join([chunk.to_binary() for chunk in chunks])

    def _check_sym_header(self, securityHeader):
        """