arnaucube/babyjubjub-ark
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Add WASM compatibility throguh feature

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arnaucube
2023-05-15 20:43:00 +02:00
parent 8e2d007d5c
commit bf617de79d
2 changed files with 32 additions and 4 deletions
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7
Cargo.toml
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@@ -22,6 +22,7 @@ poseidon-ark = { git = "https://github.com/arnaucube/poseidon-ark" }
# num-traits = "0.2.8"
blake-hash = {version="0.4.0", optional=true}
blake = {version="2.0.1", optional=true}
blake2 = { version = "0.10", optional=true}
generic-array = "0.14"
arrayref = "0.3.5"
lazy_static = "1.4.0"
@@ -36,5 +37,7 @@ name = "bench_babyjubjub"
harness = false
[features]
default = ["blake-hash"]
aarch64 = ["blake"]
default = ["blake-hash"] # compatible with circomlib
aarch64 = ["blake"] # compatible with circomlib
wasm = ["blake2"] # Warning: this feature is not compatible with the circomlib key generation (meaning that same secret keys will lead to different public keys. But the signatures are compatible with circomlib & circomlibjs.
# wasm = ["blake-hash"]

29
src/lib.rs
View File

@@ -15,11 +15,25 @@ use ark_std::{rand::Rng, UniformRand};
use poseidon_ark::Poseidon;
#[cfg(not(feature = "aarch64"))]
#[cfg(not(feature = "wasm"))]
use blake_hash::Digest; // compatible version with Blake used at circomlib
#[cfg(not(feature = "wasm"))]
#[cfg(feature = "aarch64")]
extern crate blake; // compatible version with Blake used at circomlib
#[cfg(not(feature = "aarch64"))]
#[cfg(feature = "wasm")]
extern crate blake2; // non-compatible version with Blake used at circomlib
#[cfg(not(feature = "aarch64"))]
#[cfg(feature = "wasm")]
use blake2::digest::Digest;
#[cfg(not(feature = "aarch64"))]
#[cfg(feature = "wasm")]
use blake2::Blake2b512;
use generic_array::GenericArray;
use ark_ff::fields::{Fp256, MontBackend, MontConfig};
@@ -229,11 +243,13 @@ pub fn test_bit(b: &[u8], i: usize) -> bool {
// }
#[cfg(not(feature = "aarch64"))]
#[cfg(not(feature = "wasm"))]
fn blh(b: &[u8]) -> Vec<u8> {
let hash = blake_hash::Blake512::digest(b);
hash.to_vec()
}
#[cfg(not(feature = "wasm"))]
#[cfg(feature = "aarch64")]
fn blh(b: &[u8]) -> Vec<u8> {
let mut hash = [0; 64];
@@ -241,6 +257,15 @@ fn blh(b: &[u8]) -> Vec<u8> {
hash.to_vec()
}
#[cfg(not(feature = "aarch64"))]
#[cfg(feature = "wasm")]
fn blh(b: &[u8]) -> Vec<u8> {
// not-compatible with circomlib implementation, but using Blake2b
let mut hasher = Blake2b512::new();
hasher.update(b);
hasher.finalize().to_vec()
}
#[derive(Debug, Clone)]
pub struct Signature {
pub r_b8: Point,
@@ -347,8 +372,8 @@ impl PrivateKey {
let mut s = self.scalar_key() * Fr::from(8_u8);
// let hm_b = BigInt::parse_bytes(to_hex(&hm).as_bytes(), 16).unwrap();
// let hm_b = BigInt::parse_bytes(&hm.into_bigint().to_bytes_be(), 16).unwrap();
let hm_b = Fr::from_le_bytes_mod_order(&hm.into_bigint().to_bytes_le());
s = hm_b * s;
let hm_Fr = Fr::from_le_bytes_mod_order(&hm.into_bigint().to_bytes_le());
s = hm_Fr * s;
s = r + s;
// s %= &SUBORDER.clone();