Function salsa20::hsalsa

pub fn hsalsa<R: Unsigned>(
    key: &Key,
    input: &GenericArray<u8, U16>,
) -> GenericArray<u8, U32>

The HSalsa20 function defined in the paper “Extending the Salsa20 nonce”

https://cr.yp.to/snuffle/xsalsa-20110204.pdf

HSalsa20 takes 512-bits of input:

• Constants (u32 x 4)
• Key (u32 x 8)
• Nonce (u32 x 4)

It produces 256-bits of output suitable for use as a Salsa20 key