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ascon: use chunks_exact_mut for encoding permutation output (#48)

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Artyom Pavlov 2023-03-01 10:37:39 +00:00 committed by GitHub
parent 17519f46c6
commit dc103866d4
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1 changed files with 5 additions and 3 deletions
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8
ascon/src/lib.rs
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@ -158,7 +158,9 @@ fn permutation(s: &mut [u8], start: usize, rounds: usize) {
x[4] ^= x[4].rotate_right(7) ^ x[4].rotate_right(41);
}
for (i, &b) in x.iter().enumerate() {
s[(i * 8)..((i + 1) * 8)].copy_from_slice(&b.to_be_bytes())
}
x.into_iter()
.map(u64::to_be_bytes)
// TODO: replace with `array_chunks_mut` on stabilization
.zip(s.chunks_exact_mut(8))
.for_each(|(inp, out)| out.copy_from_slice(&inp))
}