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chg: first convert all elements to little endian bytes and then consume them in a single call to blake3 hasher

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Signed-off-by: Anjan Roy <hello@itzmeanjan.in>
This commit is contained in:
Anjan Roy 2022-12-10 11:48:19 +04:00
parent 9782992662
commit aa4e313690
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GPG key ID: 10EB1439BE2E1142
1 changed files with 8 additions and 3 deletions
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11
src/hash/blake/mod.rs
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@ -276,10 +276,15 @@ where
let digest = if Felt::IS_CANONICAL {
blake3::hash(E::elements_as_bytes(elements))
} else {
let mut hasher = blake3::Hasher::new();
for element in E::as_base_elements(elements) {
hasher.update(&element.as_int().to_le_bytes());
let blen = elements.len() << 3;
let mut bytes = vec![0u8; blen];
for (idx, element) in E::as_base_elements(elements).iter().enumerate() {
bytes[idx * 8..(idx + 1) * 8].copy_from_slice(&element.as_int().to_le_bytes());
}
let mut hasher = blake3::Hasher::new();
hasher.update(&bytes);
hasher.finalize()
};
*shrink_bytes(&digest.into())