Function nacl::public_box::pack

pub fn pack(m: &[u8], n: &[u8], pk: &[u8], sk: &[u8]) -> Result<Vec<u8>, Error>

This function packs given message into xsalsa20+poly1305 secret-box bytes layout. This is an analog of crypto_box in crypto_box/curve25519xsalsa20poly1305/ref/box.c