heyauthn

HeyAuthn

A library to allow developers to create and manage Semaphore identities using WebAuthn.

👥 Contributing   |   🤝 Code of conduct   |   🔎 Issues   |   🗣️ Chat & Support

This library allows developers to create and manage Semaphore identities using WebAuthn as a cross-device biometric authentication in a way that is more convenient, smoother and secure than localStorage, Chrome extensions, or password manager based solutions.

🛠 Install

npm or yarn

Install the @semaphore-protocol/heyauthn package with npm:

npm i @semaphore-protocol/heyauthn

or yarn:

yarn add @semaphore-protocol/heyauthn

📜 Usage

import { HeyAuthn } from "@semaphore-protocol/heyauthn"

// STEP 1: Configure WebAuthn options.

const options = {
    rpName: "my-app",
    rpID: window.location.hostname,
    userID: "my-id",
    userName: "my-name"
}

// STEP 2: Register a new WebAuthn credential and get its Semaphore identity.

const { identity } = await HeyAuthn.fromRegister(options)

// Now you could also save the identity commitment in your DB (pseudocode).
fetch("/api/register" /* Replace this with your endpoint */, {
    identity.commmitment
    // ...
})

// STEP 3: Authenticate existing WebAuthn credential and signal.

const { identity } = await HeyAuthn.fromRegister(options)

// Get existing group and signal anonymously (pseudocode).
import { Group } from "@cryptkeeperzk/semaphore-group"
import { generateProof } from "@cryptkeeperzk/semaphore-proof"
import { utils } from "ethers"

const group = new Group("42")

group.addMembers(memberList)

const signal = utils.formatBytes32String("Hey anon!")

generateProof(identity, group, group.id, "42", {
    zkeyFilePath: "./semaphore.zkey",
    wasmFilePath: "./semaphore.wasm"
})

Authors

• Vivek Bhupatiraju
• Richard Liu
• emma
• Sehyun Chung
• Enrico Bottazzi