Function kmac256
pub fn kmac256(key: &[u8], data: &[u8], custom: &[u8], out: &mut [u8])Expand description
KMAC256 keyed MAC (NIST SP 800-185 §4).
out.len() is the requested output length L (in octets);
this fixed-length variant binds L into the input via
right_encode(L*8). NIST SP 800-185 §4.3.