I made this crappy, most likely very insecure hash function with zero actual cryptographic hash knowledge while on a plane.
If you can find a collision or find the preimage of f11e7def9c2ec4c0, you'll officially have broken it.
Link: https://gist.github.com/quackduck/0da5d2ed7807e3ef22dc2e0cdadbf90a
