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Pad bytes with 10*0 #267

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Jan 27, 2024
Merged

Pad bytes with 10*0 #267

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6 changes: 2 additions & 4 deletions src/hash/rescue/rpx/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -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
// additional permutation must be performed.
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 need to pad the remainder bytes of the chunk with zeroes, separated by a `1`.
// this will avoid collisions at the bytes level.
if chunk.len() == BINARY_CHUNK_SIZE {
// we always pad `bytes` with a 1 followed by as many 0's to fill up `buf`.
if i != num_field_elem - 1 {
buf[..BINARY_CHUNK_SIZE].copy_from_slice(chunk);
} else {
buf.fill(0);
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