Ah, providing it at the terminal level does make more sense (that was probably obvious to anyone with any familiarity with the basics of Unix terminals, sorry), and now that I hear it I'm not surprised it already exists :)
In that case, I guess this functionality would be implemented similarly to the example you mentioned of stopping the client from sending every keystroke at a password prompt, right? It seems like it would be strange for ssh to send the 'toggle echo' signals to the client, but not the 'toggle canonical mode' signals (which the client could also handle in a useful way).
In that case, I guess this functionality would be implemented similarly to the example you mentioned of stopping the client from sending every keystroke at a password prompt, right? It seems like it would be strange for ssh to send the 'toggle echo' signals to the client, but not the 'toggle canonical mode' signals (which the client could also handle in a useful way).