pub fn hkdf<const OKM_LEN: usize>(
salt: &[u8],
ikm: &[u8],
info: &[u8],
) -> Result<[u8; OKM_LEN], Error>Expand description
HKDF using the salt, input key material ikm, info. The output length
is defined through the result type.
Calls extract and expand with the given input.
Returns the key material in an array of length okm_len.