WebAssembly compatibility
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@ -8,13 +8,13 @@ homepage = "https://github.com/ebfull/phase2"
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license = "MIT/Apache-2.0"
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license = "MIT/Apache-2.0"
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repository = "https://github.com/ebfull/phase2"
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repository = "https://github.com/ebfull/phase2"
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[lib]
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crate-type = ["cdylib", "lib"]
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[dependencies]
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[dependencies]
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rand = "0.4"
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rand = "0.4"
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bellman_ce = { path = "../bellman" }
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byteorder = "1"
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byteorder = "1"
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exitcode = "1.1.2"
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exitcode = "1.1.2"
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num_cpus = "1"
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crossbeam = "0.3"
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blake2-rfc = "0.2"
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blake2-rfc = "0.2"
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blake2 = "0.6.1"
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blake2 = "0.6.1"
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serde = { version = "1.0", features = ["derive"] }
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serde = { version = "1.0", features = ["derive"] }
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@ -22,5 +22,20 @@ serde_json = "1.0"
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num-bigint = "0.2.3"
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num-bigint = "0.2.3"
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num-traits = "0.2.8"
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num-traits = "0.2.8"
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itertools = "0.8.1"
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itertools = "0.8.1"
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rust-crypto = "0.2"
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hex = "0.4.0"
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hex = "0.4.0"
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cfg-if = "0.1.10"
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bellman_ce = { path = "../bellman", default-features = false } # active features depend on build type
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# needed for native only but don't break wasm if present
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num_cpus = "1"
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crossbeam = "0.3"
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# needed for wasm only
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wasm-bindgen = { version = "0.2.58", optional = true }
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js-sys = { version = "0.3.35", optional = true }
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web-sys = { version = "0.3.35", features = ["console"], optional = true }
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console_error_panic_hook = { version = "0.1.6", optional = true }
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[features]
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default = ["bellman_ce/multicore"]
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wasm = ["wasm-bindgen", "js-sys", "web-sys", "console_error_panic_hook", "bellman_ce/wasm"]
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@ -2,6 +2,28 @@
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This library is still under development.
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This library is still under development.
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## WebAssembly how-to
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Build wasm package using `wasm-pack build --release -- --no-default-features --features wasm`
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this will generate `./pkg` directory with wasm file and js bindings. After that you
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can use this package in your browser application like so:
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```js
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async function main() {
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const phase2 = await import("./pkg/phase2.js")
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let data = await fetch('params')
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data = await data.arrayBuffer()
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data = new Uint8Array(data)
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console.log('Source params', data)
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const result = phase2.contribute(data)
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console.log('Updated params', result)
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// upload updated params
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}
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main().catch(console.error)
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```
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## [Documentation](https://docs.rs/phase2/)
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## [Documentation](https://docs.rs/phase2/)
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## Security Warnings
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## Security Warnings
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@ -1,19 +1,61 @@
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#![allow(unused_imports)]
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#![allow(unused_imports)]
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#[macro_use]
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extern crate serde;
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extern crate bellman_ce;
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extern crate bellman_ce;
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extern crate rand;
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extern crate rand;
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extern crate byteorder;
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extern crate byteorder;
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extern crate blake2_rfc;
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extern crate blake2_rfc;
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extern crate num_cpus;
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extern crate num_cpus;
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extern crate crossbeam;
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extern crate crossbeam;
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extern crate cfg_if;
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#[macro_use]
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use cfg_if::cfg_if;
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extern crate serde;
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extern crate serde_json;
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pub mod keypair;
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pub mod keypair;
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pub mod keypair_assembly;
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pub mod keypair_assembly;
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pub mod hash_writer;
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pub mod hash_writer;
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pub mod parameters;
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pub mod parameters;
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pub mod utils;
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pub mod utils;
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pub mod circom_circuit;
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pub mod circom_circuit;
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cfg_if! {
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if #[cfg(feature = "wasm")] {
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extern crate serde_json;
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extern crate js_sys;
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extern crate web_sys;
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extern crate wasm_bindgen;
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extern crate console_error_panic_hook;
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extern crate itertools;
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use wasm_bindgen::prelude::*;
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use itertools::Itertools;
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use parameters::MPCParameters;
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use std::io::{
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Read,
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Write,
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};
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macro_rules! log {
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($($t:tt)*) => (web_sys::console::log_1(&format_args!($($t)*).to_string().into()))
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}
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#[wasm_bindgen]
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pub fn contribute(params: Vec<u8>) -> Result<Vec<u8>, JsValue> {
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console_error_panic_hook::set_once();
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let disallow_points_at_infinity = false;
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log!("Initializing phase2");
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let mut rng = &mut rand::XorShiftRng::new_unseeded(); // TODO: change this unsafe unseeded random (!)
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let mut params = MPCParameters::read(&*params, disallow_points_at_infinity, true).expect("unable to read params");
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log!("Contributing...");
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let hash = params.contribute(&mut rng);
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log!("Contribution hash: 0x{:02x}", hash.iter().format(""));
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let mut output: Vec<u8> = vec![];
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params.write(&mut output).expect("failed to write updated parameters");
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log!("Returning parameters");
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Ok(output)
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}
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}
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}
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@ -4,6 +4,11 @@ extern crate byteorder;
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extern crate num_cpus;
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extern crate num_cpus;
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extern crate crossbeam;
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extern crate crossbeam;
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#[cfg(feature = "wasm")]
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use bellman_ce::singlecore::Worker;
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#[cfg(not(feature = "wasm"))]
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use bellman_ce::multicore::Worker;
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use byteorder::{
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use byteorder::{
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BigEndian,
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BigEndian,
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ReadBytesExt,
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ReadBytesExt,
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@ -46,8 +51,6 @@ use bellman_ce::pairing::{
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}
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}
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};
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};
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pub use bellman_ce::multicore::*;
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use bellman_ce::{
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use bellman_ce::{
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Circuit,
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Circuit,
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SynthesisError,
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SynthesisError,
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@ -415,6 +418,7 @@ impl MPCParameters {
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// Generate a keypair
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// Generate a keypair
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let (pubkey, privkey) = keypair(rng, self);
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let (pubkey, privkey) = keypair(rng, self);
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#[cfg(not(feature = "wasm"))]
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fn batch_exp<C: CurveAffine>(bases: &mut [C], coeff: C::Scalar) {
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fn batch_exp<C: CurveAffine>(bases: &mut [C], coeff: C::Scalar) {
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let coeff = coeff.into_repr();
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let coeff = coeff.into_repr();
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@ -459,6 +463,27 @@ impl MPCParameters {
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}
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}
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}
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}
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#[cfg(feature = "wasm")]
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fn batch_exp<C: CurveAffine>(bases: &mut [C], coeff: C::Scalar) {
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let coeff = coeff.into_repr();
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let mut projective = vec![C::Projective::zero(); bases.len()];
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// Perform wNAF, placing results into `projective`.
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let mut wnaf = Wnaf::new();
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for (base, projective) in bases.iter_mut().zip(projective.iter_mut()) {
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*projective = wnaf.base(base.into_projective(), 1).scalar(coeff);
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}
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// Perform batch normalization
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C::Projective::batch_normalization(&mut projective);
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// Turn it all back into affine points
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for (projective, affine) in projective.iter().zip(bases.iter_mut()) {
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*affine = projective.into_affine();
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}
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}
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let delta_inv = privkey.delta.inverse().expect("nonzero");
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let delta_inv = privkey.delta.inverse().expect("nonzero");
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let mut l = (&self.params.l[..]).to_vec();
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let mut l = (&self.params.l[..]).to_vec();
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let mut h = (&self.params.h[..]).to_vec();
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let mut h = (&self.params.h[..]).to_vec();
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