Playing around with RSA implementation (obviously don't use this code)

Experimenting with RSA implementation for learning purposes, obviously not to be meant for usage in anything else, also limitied to a keygen prototype.

Main things that currently make it cryptographically insecure, aside from my questionable C programming skills:

• Generated keys are 32-Bit
• Generation of random numbers is done with rand(), seeded with time(NULL) (I know, I know...)

This was just to avoid large integer arithmetic and external CSPRGN libraries, as it was never meant for secure production use anyhow.