Module to hash input using the Blake2s version of Blake2.

Blake2s is optimized for 8- to 32-bit platforms and produces digests of any size between 1 and 32 bytes.

The hash function produces a digest in binary form, as bytes. The hash_hex function outputs the digest in hexadecimal format.

The hash_nif function calls the native code. It is unlikely that you will need to call this function directly.