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hashing: Keccak -> SHA256

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Michael Sproul 2019-04-29 12:06:02 +10:00
parent 00f85a0324
commit 7dda85e87e
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GPG Key ID: 77B1309D2E54E914
2 changed files with 8 additions and 15 deletions
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2
eth2/utils/hashing/Cargo.toml
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@ -5,4 +5,4 @@ authors = ["Paul Hauner <paul@paulhauner.com>"]
edition = "2018"
[dependencies]
tiny-keccak = "1.4.2"
ring = "0.14.6"

21
eth2/utils/hashing/src/lib.rs
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@ -1,11 +1,7 @@
use tiny_keccak::Keccak;
use ring::digest::{digest, SHA256};
pub fn hash(input: &[u8]) -> Vec<u8> {
let mut keccak = Keccak::new_keccak256();
keccak.update(input);
let mut result = vec![0; 32];
keccak.finalize(result.as_mut_slice());
result
digest(&SHA256, input).as_ref().into()
}
/// Get merkle root of some hashed values - the input leaf nodes is expected to already be hashed
@ -41,19 +37,16 @@ pub fn merkle_root(values: &[Vec<u8>]) -> Option<Vec<u8>> {
#[cfg(test)]
mod tests {
use super::*;
use std::convert::From;
use ring::test;
#[test]
fn test_hashing() {
let input: Vec<u8> = From::from("hello");
let input: Vec<u8> = b"hello world".as_ref().into();
let output = hash(input.as_ref());
let expected = &[
0x1c, 0x8a, 0xff, 0x95, 0x06, 0x85, 0xc2, 0xed, 0x4b, 0xc3, 0x17, 0x4f, 0x34, 0x72,
0x28, 0x7b, 0x56, 0xd9, 0x51, 0x7b, 0x9c, 0x94, 0x81, 0x27, 0x31, 0x9a, 0x09, 0xa7,
0xa3, 0x6d, 0xea, 0xc8,
];
assert_eq!(expected, output.as_slice());
let expected_hex = "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9";
let expected: Vec<u8> = test::from_hex(expected_hex).unwrap();
assert_eq!(expected, output);
}
#[test]