Function single_block_keyed_hash_many_exact

pub fn single_block_keyed_hash_many_exact<const NUM_BLOCKS: usize>(
    key: &[u8; 32],
    inputs: &[[u8; 64]; NUM_BLOCKS],
    outputs: &mut [[u8; 32]; NUM_BLOCKS],
)

Keyed hash function for many single-block inputs