/diy/ - Do It Yourself

I have a very simple constant current source with lm317 like this.
The resistor (I = 1.25 / R) determines how much current is being pushed through the load and i would like to be able to change that resistor digitally somehow.
The resistance range i need is between 1 ohm - 100 ohm
Now, there is a bunch of digital resistor chips with serial interface or i2c, but they are all useless because they can only handle current in the range of milliamps, and i need to output currents up to 1.25A. How can i solve this?
(no buck converters etc, it has to be lm317)