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Ed25519 for WebAssembly

WebAssembly port of Ed25519_dalek, a Rust implementation of Ed25519 signatures.

Benchmark (Deno)

About 5x to 7x faster than @noble/ed25519

git clone https://github.com/hazae41/ed25519-dalek-wasm && cd ed25519-dalek-wasm/bench/deno && npm run bench
cpu: Apple M1 Max
runtime: deno 1.26.0 (aarch64-apple-darwin)

file:///Users/hg/Travail/ed25519-dalek-wasm/bench/deno/bench.ts
benchmark                               time (avg)             (min … max)       p75       p99      p995
-------------------------------------------------------------------------- -----------------------------
ed25519_dalek 1.1.8 (unserialized)  313.56 µs/iter (303.83 µs … 434.62 µs) 314.04 µs 342.88 µs 349.38 µs
@noble/ed25519 1.7.1                  2.14 ms/iter     (1.92 ms … 2.67 ms)   2.18 ms   2.36 ms   2.38 ms

summary
  ed25519_dalek 1.1.8 (unserialized)
   6.81x faster than @noble/ed25519 1.7.1

ed25519_dalek 1.1.8 (serialized)    354.74 µs/iter (346.42 µs … 503.04 µs) 355.38 µs 381.29 µs 392.71 µs
@noble/ed25519 1.7.1                  2.05 ms/iter     (1.92 ms … 2.24 ms)   2.09 ms   2.23 ms   2.24 ms

summary
  ed25519_dalek 1.1.8 (serialized)
   5.79x faster than @noble/ed25519 1.7.1

Benchmark (Node)

Not as fast as supercop.wasm (Emscripten port of @orlp/ed25519) as Ed25519_dalek doesn’t use sha512 yet

ed25519_dalek 1.1.8 (unserialized) 4,069 ops/sec ±0.05% (12209 samples)
ed25519_dalek 1.1.8 (serialized) 3,541 ops/sec ±0.07% (10624 samples)
@noble/ed25519 1.7.1 584 ops/sec ±0.22% (1740 samples)
supercop.wasm 5.0.1 5,931 ops/sec ±0.1% (17782 samples)

Install (Node)

npm i ed25519_dalek

Test (Deno)

deno run --allow-net https://deno.land/x/ed25519_dalek/test/deno/test.ts

Basic usage

// Deno
import Ed25519, {
  Ed25519Keypair,
  Ed25519PublicKey,
  Ed25519Signature,
} from "https://deno.land/x/ed25519_dalek/deno/mod.ts";

// Node
// import Ed25519, {
//   Ed25519Keypair,
//   Ed25519PublicKey,
//   Ed25519Signature,
// } from "ed25519_dalek";

// -- Wait for WASM to load --
await Ed25519();

// -- Generating an identity --
const keypair = new Ed25519Keypair();
const identity = keypair.public(); // Ed25519PublicKey

// -- Signing & Verifying --
const bytes = new TextEncoder().encode("hello world"); // Uint8Array

const proof = keypair.sign(bytes); // Ed25519Signature
const verified = identity.verify(bytes, proof); // boolean

Serializing to Uint8Array

const bytes = new Ed25519Keypair().to_bytes();
const keypair = Ed25519Keypair.from_bytes(bytes);
const bytes = keypair.public().to_bytes();
const identity = Ed25519PublicKey.from_bytes(bytes);
const bytes = keypair.sign(input).to_bytes();
const proof = Ed25519Signature.from_bytes(bytes);

Building

  • Install Deno

https://deno.land

  • Install binaryen (for wasm-opt) and add it your PATH

https://github.com/WebAssembly/binaryen/releases

  • Install wasm-pack
cargo install wasm-pack
  • Install dependencies
npm install
  • Build wasm and module
npm run build