You can make a few simplifying guesses. 1. Google uses a lot of go so its likely they use bcrypt, so try that first. 2. Most people arent security experts so do

You can make a few simplifying guesses. 1. Google uses a lot of go so its likely they use bcrypt, so try that first. 2. Most people arent security experts so dont bother w/ stretching, just do one hash. Those 2 assumptions right there get you what you want 90% of the time.