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fix: always pad bytes with 10*0 (#267)

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Al-Kindi-0 2024-01-27 02:54:14 +01:00 • committed by Bobbin Threadbare
parent 3882e0f719
commit 0acceaa526
1 changed files with 2 additions and 4 deletions
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6
src/hash/rescue/rpx/mod.rs
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@ -88,10 +88,8 @@ impl Hasher for Rpx256 {
// `i` is not zero, then the chunks count wasn't enough to fill the state range, and an // `i` is not zero, then the chunks count wasn't enough to fill the state range, and an
// additional permutation must be performed. // additional permutation must be performed.
let i = bytes.chunks(BINARY_CHUNK_SIZE).fold(0, |i, chunk| { let i = bytes.chunks(BINARY_CHUNK_SIZE).fold(0, |i, chunk| {
// the last element of the iteration may or may not be a full chunk. if it's not, then // we always pad `bytes` with a 1 followed by as many 0's to fill up `buf`.
// we need to pad the remainder bytes of the chunk with zeroes, separated by a `1`. if i != num_field_elem - 1 {
// this will avoid collisions at the bytes level.
if chunk.len() == BINARY_CHUNK_SIZE {
buf[..BINARY_CHUNK_SIZE].copy_from_slice(chunk); buf[..BINARY_CHUNK_SIZE].copy_from_slice(chunk);
} else { } else {
buf.fill(0); buf.fill(0);