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make hashing crate wasm compatible

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This commit is contained in:
Matt Garnett
2019-06-22 13:57:37 -04:00
parent 20b7bdda4a
commit 2a50550b87
3 changed files with 38 additions and 8 deletions
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33
eth2/utils/hashing/src/lib.rs
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@@ -1,7 +1,17 @@
#[cfg(not(target_arch = "wasm32"))]
use ring::digest::{digest, SHA256};
#[cfg(target_arch = "wasm32")]
use sha2::{Digest, Sha256};
pub fn hash(input: &[u8]) -> Vec<u8> {
digest(&SHA256, input).as_ref().into()
#[cfg(not(target_arch = "wasm32"))]
let h = digest(&SHA256, input).as_ref().into();
#[cfg(target_arch = "wasm32")]
let h = Sha256::digest(input).as_ref().into();
h
}
/// Get merkle root of some hashed values - the input leaf nodes is expected to already be hashed
@@ -37,19 +47,24 @@ pub fn merkle_root(values: &[Vec<u8>]) -> Option<Vec<u8>> {
#[cfg(test)]
mod tests {
use super::*;
use ring::test;
use rustc_hex::FromHex;
#[test]
#[cfg(target_arch = "wasm32")]
use wasm_bindgen_test::*;
#[cfg_attr(not(target_arch = "wasm32"), test)]
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn test_hashing() {
let input: Vec<u8> = b"hello world".as_ref().into();
let output = hash(input.as_ref());
let expected_hex = "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9";
let expected: Vec<u8> = test::from_hex(expected_hex).unwrap();
let expected: Vec<u8> = expected_hex.from_hex().unwrap();
assert_eq!(expected, output);
}
#[test]
#[cfg_attr(not(target_arch = "wasm32"), test)]
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn test_merkle_root() {
// hash the leaf nodes
let mut input = vec![
@@ -79,13 +94,17 @@ mod tests {
assert_eq!(&expected[..], output.unwrap().as_slice());
}
#[test]
#[cfg_attr(not(target_arch = "wasm32"), test)]
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn test_empty_input_merkle_root() {
let input = vec![];
let output = merkle_root(&input[..]);
assert_eq!(None, output);
}
#[test]
#[cfg_attr(not(target_arch = "wasm32"), test)]
#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
fn test_odd_leaf_merkle_root() {
let input = vec![
hash("a".as_bytes()),