Built-in function for hashing?

[ptpaterson]

I also think some native crypto functions would be cool. Here is some recent dicussion.

FQL random and SHA256 functions

I need to generate and hash a token for passwordless login. I was wondering if FQL can be used to generate a random string and then to hash it with SHA256? What about generating a simple auto incrementing key on insert like you can do with MySQL etc.?