No officer of employee of a state correctional institution, contractor, or the employee of such contractor, shall make a present to, receive a present from, or have barter or dealings with a convict. An officer shall not receive compensation for his services other than that prescribed by law, or for an act or service which he performs for or on behalf of a contractor, or the agent, or employee of such contractor. Whoever violates this section shall be dismissed, and a contractor, or the agent, or employee of such contractor, concerned in the violation, shall be expelled from the state correctional institution and not again permitted within it in such capacity.