pub fn decrypt_block<const N: usize>(
round_keys: &[[u8; 16]; N],
block: &[u8; 16],
) -> [u8; 16]Expand description
Decrypt one 16-byte block.
N = 11 for AES-128 (10 rounds), N = 15 for AES-256 (14 rounds).
This is the constant-time software path; it performs no data-dependent memory accesses or branches.