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Updates the hash function used to Keccak-256

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This commit is contained in:
Alex Stokes
2018-12-11 14:47:05 -08:00
parent 7808835f1c
commit 97bd323a52
3 changed files with 11 additions and 17 deletions
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20
beacon_chain/utils/hashing/src/lib.rs
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@@ -1,17 +1,11 @@
extern crate blake2_rfc;
extern crate tiny_keccak;
use self::blake2_rfc::blake2b::blake2b;
use tiny_keccak::Keccak;
pub fn canonical_hash(input: &[u8]) -> Vec<u8> {
let result = blake2b(64, &[], input);
result.as_bytes()[0..32].to_vec()
}
pub fn proof_of_possession_hash(input: &[u8]) -> Vec<u8> {
let result = blake2b(64, &[], input);
let mut hash = result.as_bytes()[32..64].to_vec();
// TODO: this padding is not part of the spec, it is required otherwise Milagro will panic.
// We should either drop the padding or ensure the padding is in the spec.
hash.append(&mut vec![0; 18]);
hash
let mut keccak = Keccak::new_keccak256();
keccak.update(input);
let mut result = Vec::with_capacity(32);
keccak.finalize(result.as_mut_slice());
result
}