Turn Phone into USB Keyboard without low level kernel modifications.

Hello folks,

I am stuck and I hope you guys can help me out with a tip or two.

What I am trying to do is:

1) Connect my smartphone to a desktop through a USB cable (or OTG cable or anything that will do the job) and make the desktop think that a usb keyboard was connected to it and not a smartphone (hence no need for drivers installation).

2) After usb cable connection, the smartphone will be able to send keystrokes to the desktop.

Points of consideration:
* The desktop has no bluetooth nor wireless connections and nothing can be installed in it.
* installing an app (downloaded from store) into the smartphone is possible, but with no kernel modifications or root, I mean out of the box solution.

From reading those two great links:
[1] https://stackoverflow.com/questions/...l-usb-keyboard
[2] http://forum.xda-developers.com/show....php?t=1871281

It appears my best option is to use a USB cable with a "special hardware level converter " and attache it both to the desktop and smartphone. It will tell the desktop it is a USB keyboard and receive keystrokes from the smartphone, before forwarding them to the desktop.

My question is:

Does such cable exist?

If yes, where can I find it?

If not, is there a company that can help make it?

Thanks guys, Mozart