8cfa36fedd
* Rename `hashing` crate to `eth2_hashing` * Add license, desc to eth2_hashing Cargo.toml * Remove merkle root from eth2 hashing * Remove old benches folder (zombied from old branch) * Add docs to eth2_hashing * Prepare tree_hash for publishing on crates.io * Update deps to use crates.io instead of paths * Update all crates to pull ssz from crates.io * Remove cached_tree_hash, add patches to manifest * Fix compile error in benches * Remove unused code * Fix fake_crypto compile error
45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
//! Provides a simple hash function utilizing `ring::digest::SHA256`.
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//!
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//! The purpose of this crate is to provide an abstraction to whatever hash function Ethereum
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//! 2.0 is using. The hash function has been subject to change during the specification process, so
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//! defining it once in this crate makes it easy to replace.
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#[cfg(not(target_arch = "wasm32"))]
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use ring::digest::{digest, SHA256};
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#[cfg(target_arch = "wasm32")]
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use sha2::{Digest, Sha256};
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/// Returns the digest of `input`.
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///
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/// Uses `ring::digest::SHA256`.
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pub fn hash(input: &[u8]) -> Vec<u8> {
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#[cfg(not(target_arch = "wasm32"))]
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let h = digest(&SHA256, input).as_ref().into();
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#[cfg(target_arch = "wasm32")]
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let h = Sha256::digest(input).as_ref().into();
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h
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use rustc_hex::FromHex;
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#[cfg(target_arch = "wasm32")]
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use wasm_bindgen_test::*;
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#[cfg_attr(not(target_arch = "wasm32"), test)]
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#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
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fn test_hashing() {
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let input: Vec<u8> = b"hello world".as_ref().into();
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let output = hash(input.as_ref());
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let expected_hex = "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9";
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let expected: Vec<u8> = expected_hex.from_hex().unwrap();
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assert_eq!(expected, output);
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}
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}
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