Compare commits
2 Commits
group-e072
...
proposal-e
| Author | SHA1 | Date | |
|---|---|---|---|
|
c89c6f95a6 | ||
|
|
78d5352a48 |
25
.gitignore
vendored
25
.gitignore
vendored
@@ -1,24 +1 @@
|
||||
# Nuxt dev/build outputs
|
||||
.output
|
||||
.data
|
||||
.nuxt
|
||||
.nitro
|
||||
.cache
|
||||
dist
|
||||
|
||||
# Node dependencies
|
||||
node_modules
|
||||
|
||||
# Logs
|
||||
logs
|
||||
*.log
|
||||
|
||||
# Misc
|
||||
.DS_Store
|
||||
.fleet
|
||||
.idea
|
||||
|
||||
# Local env files
|
||||
.env
|
||||
.env.*
|
||||
!.env.example
|
||||
node_modules/
|
||||
157
README.md
157
README.md
@@ -1,129 +1,28 @@
|
||||
# 🗳️ P2P Verified Polling App
|
||||
|
||||
A decentralized, real-time polling application built with **Nuxt 3**, **Yjs**, and **WebRTC**. This app allows users to create and participate in polls where every vote is cryptographically signed and verified peer-to-peer, ensuring data integrity without a central authority "owning" the results.
|
||||
|
||||
---
|
||||
|
||||
## 🌟 Key Features
|
||||
|
||||
* **Serverless Real-time Sync:** Uses **Yjs** (CRDTs) and **WebRTC** to sync poll data directly between browsers. No database is required for live updates.
|
||||
* **Persistence with Nitro:** While the logic is P2P, the **Nuxt/Nitro** backend provides a "Snapshot" service to ensure polls persist even after all peers go offline.
|
||||
* **Cryptographic Integrity:** Every vote is signed using **RSA-PSS (Web Crypto API)**. Each user has a unique private key (stored locally via `.pem` files) to ensure votes cannot be forged or tampered with.
|
||||
* **Chained Verification:** Implements a "History-Signing" logic where each new vote signs the entire preceding state of the poll, creating a verifiable chain of trust.
|
||||
* **Privacy First:** Users identify via UUIDs and Public/Private key pairs rather than traditional accounts.
|
||||
|
||||
---
|
||||
|
||||
## ⚙️ How It Works
|
||||
|
||||
### 1. Identity Creation
|
||||
When a new user is created, the system generates a unique **UUID (User ID)** and an **RSA Key Pair**. The user is prompted to save their **Private Key** as a `.pem` file, named after their User ID (e.g., `550e8400-e29b.pem`). This file acts as their "Passport"—it is never uploaded to the server and must be kept secure by the user.
|
||||
|
||||
### 2. Authentication
|
||||
Upon returning to the app, users load their local `.pem` file. The application extracts the Private Key for signing and the UUID for identification. No passwords or central servers are involved in this local-first login process.
|
||||
|
||||
### 3. Joining a Poll
|
||||
When a user joins a poll, the app fetches the latest binary snapshot from the server to populate a local **Y.Doc**. This ensures the user sees the current state immediately, even before connecting to other peers.
|
||||
|
||||
### 4. The P2P Mesh
|
||||
The app establishes connections to other active voters via a WebRTC signaling server. Any changes made to the poll (adding options or voting) are broadcasted instantly to all peers using Conflict-free Replicated Data Types (CRDTs) to prevent sync conflicts.
|
||||
|
||||
### 5. Casting a Signed Vote
|
||||
To ensure security, the voting process follows a strict cryptographic chain:
|
||||
* The app captures the current list of votes.
|
||||
* It appends the new vote data (User ID + Timestamp).
|
||||
* It signs the **entire array** (the previous history + the new vote) using the user's RSA private key.
|
||||
* The signed update is merged into the shared Yjs Map and broadcasted.
|
||||
|
||||
### 6. Distributed Verification
|
||||
Whenever a peer receives a new update, they fetch the voter's **Public Key** from the API. They then verify that the signature matches the current state of the poll history. If a signature is invalid or the history has been tampered with, the vote is rejected by the peer's local state.
|
||||
|
||||
---
|
||||
|
||||
## 🛠️ Tech Stack
|
||||
|
||||
* **Framework:** [Nuxt 3](https://nuxt.com/) (Vue 3 + TypeScript)
|
||||
* **Conflict-Free Replicated Data Types (CRDT):** [Yjs](https://yjs.dev/)
|
||||
* **P2P Transport:** `y-webrtc`
|
||||
* **Security:** Web Crypto API (SubtleCrypto)
|
||||
* **Backend/Storage:** Nitro (Nuxt's server engine) with filesystem storage drivers
|
||||
|
||||
# AI Disclaimer
|
||||
|
||||
This App was developed with the assistance of AI.
|
||||
|
||||
# Nuxt Minimal Starter
|
||||
|
||||
Look at the [Nuxt documentation](https://nuxt.com/docs/getting-started/introduction) to learn more.
|
||||
|
||||
## Setup
|
||||
|
||||
Make sure to install dependencies:
|
||||
|
||||
```bash
|
||||
# npm
|
||||
npm install
|
||||
|
||||
# pnpm
|
||||
pnpm install
|
||||
|
||||
# yarn
|
||||
yarn install
|
||||
|
||||
# bun
|
||||
bun install
|
||||
```
|
||||
|
||||
## Development Server
|
||||
|
||||
Start the development server on `http://localhost:3000`:
|
||||
|
||||
```bash
|
||||
# npm
|
||||
npm run dev
|
||||
|
||||
# pnpm
|
||||
pnpm dev
|
||||
|
||||
# yarn
|
||||
yarn dev
|
||||
|
||||
# bun
|
||||
bun run dev
|
||||
```
|
||||
|
||||
## Production
|
||||
|
||||
Build the application for production:
|
||||
|
||||
```bash
|
||||
# npm
|
||||
npm run build
|
||||
|
||||
# pnpm
|
||||
pnpm build
|
||||
|
||||
# yarn
|
||||
yarn build
|
||||
|
||||
# bun
|
||||
bun run build
|
||||
```
|
||||
|
||||
Locally preview production build:
|
||||
|
||||
```bash
|
||||
# npm
|
||||
npm run preview
|
||||
|
||||
# pnpm
|
||||
pnpm preview
|
||||
|
||||
# yarn
|
||||
yarn preview
|
||||
|
||||
# bun
|
||||
bun run preview
|
||||
```
|
||||
|
||||
Check out the [deployment documentation](https://nuxt.com/docs/getting-started/deployment) for more information.
|
||||
# P2P Poll App
|
||||
|
||||
## Install npm packages
|
||||
```
|
||||
npm init -y
|
||||
npm install
|
||||
```
|
||||
|
||||
Note: the frontend obtains the packages `yjs` and `y-websocket` dynamically.
|
||||
|
||||
## Run backend
|
||||
```
|
||||
node backend.js
|
||||
```
|
||||
|
||||
### Note on Yjs suggestion
|
||||
Note that the following server setup is suggested in the Yjs docs (https://docs.yjs.dev/ecosystem/connection-provider/y-websocket):
|
||||
```
|
||||
npm install y-websocket-server
|
||||
HOST=localhost PORT=1000 npx y-websocket
|
||||
```
|
||||
|
||||
However, across a range of npm versions, this does not work.
|
||||
Nevertheless, the essential code from the `y-websocket-server` package is used here as provided in `utils.js`.
|
||||
|
||||
## Run frontend
|
||||
Open "frontend.html" in browser.
|
||||
|
||||
|
||||
175
app/app.vue
175
app/app.vue
@@ -1,175 +0,0 @@
|
||||
<style>
|
||||
/* Basic styling to make it look clean */
|
||||
body {
|
||||
font-family: system-ui, -apple-system, sans-serif;
|
||||
background-color: #f4f4f9;
|
||||
color: #333;
|
||||
margin: 0;
|
||||
display: flex;
|
||||
justify-content: center;
|
||||
padding: 2rem;
|
||||
}
|
||||
|
||||
header {
|
||||
margin-bottom: 2rem;
|
||||
text-align: center;
|
||||
}
|
||||
|
||||
h1 { margin: 0 0 0.5rem 0; }
|
||||
|
||||
input {
|
||||
flex-grow: 1;
|
||||
padding: 0.75rem;
|
||||
border: 1px solid #ccc;
|
||||
border-radius: 6px;
|
||||
font-size: 1rem;
|
||||
}
|
||||
|
||||
button,
|
||||
.button {
|
||||
background: #3b82f6;
|
||||
color: white;
|
||||
border: none;
|
||||
padding: 0.75rem 1rem;
|
||||
border-radius: 6px;
|
||||
cursor: pointer;
|
||||
font-weight: bold;
|
||||
transition: background 0.2s;
|
||||
}
|
||||
|
||||
button:hover,
|
||||
.button:hover { background: #2563eb; }
|
||||
|
||||
.status {
|
||||
font-size: 0.85rem;
|
||||
color: #666;
|
||||
}
|
||||
.status .connected { color: #10b981; font-weight: bold; }
|
||||
|
||||
.connectionFailed { color: #FF2525; font-weight: bold; }
|
||||
|
||||
.poll-container {
|
||||
background: white;
|
||||
padding: 2rem;
|
||||
border-radius: 12px;
|
||||
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
|
||||
width: 100%;
|
||||
max-width: 500px;
|
||||
}
|
||||
|
||||
.back-btn {
|
||||
margin-left: 1rem;
|
||||
padding: 0.2rem 0.5rem;
|
||||
font-size: 0.7rem;
|
||||
background: #64748b;
|
||||
}
|
||||
|
||||
/* Hide the actual file input */
|
||||
input[type="file"] {
|
||||
display: none;
|
||||
}
|
||||
|
||||
</style>
|
||||
<template>
|
||||
<div class="poll-container">
|
||||
<header>
|
||||
<h1 @click="activePollId = null" style="cursor:pointer">P2P Polling App 🗳️</h1>
|
||||
<div class="status">
|
||||
<button v-if="activePollId" @click="activePollId = null" class="back-btn">← Back To List</button>
|
||||
<span :class="{ 'connected': isConnected }">
|
||||
● {{ isConnected ? 'Synced' : 'Waiting for other Peers...' }}
|
||||
</span>
|
||||
<span> | Peers online: {{ connectedPeers }}</span>
|
||||
<h2 v-if="connectionAttempFailed" class="connectionFailed">⚠ Connection to Signaling Server Failed!</h2>
|
||||
<div v-if="user===null" style="margin-top: 10px;">
|
||||
<button @click="createUser">Create New User</button>
|
||||
Or
|
||||
<label title="Select Key File">
|
||||
<span class="button">Login</span>
|
||||
<input
|
||||
type="file"
|
||||
accept=".pem"
|
||||
@change="loadUser"
|
||||
/>
|
||||
</label>
|
||||
</div>
|
||||
</div>
|
||||
</header>
|
||||
|
||||
<main>
|
||||
<PollList v-if="!activePollId" :userid="user?.userid" @select-poll="selectPoll" />
|
||||
<Poll v-else :activePollId="activePollId" :userid="user?.userid" :poll-data="pollData" :addOption="addOption" :vote="vote"/>
|
||||
</main>
|
||||
</div>
|
||||
</template>
|
||||
|
||||
<script setup lang="ts">
|
||||
import { v4 as uuidv4 } from 'uuid';
|
||||
const activePollId = ref<string | null>(null);
|
||||
const user = shallowRef<UserData | null>(null);
|
||||
|
||||
const { pollData, isConnected, connectionAttempFailed, connectedPeers, addOption, vote } = usePoll(activePollId,user);
|
||||
|
||||
const selectPoll = (id: string) => {
|
||||
activePollId.value = id;
|
||||
};
|
||||
|
||||
|
||||
const createUser = async () => {
|
||||
try {
|
||||
const keypair : CryptoKeyPair = await generateUserKeyPair();
|
||||
console.log('keypair:', keypair);
|
||||
const uuid = uuidv4();
|
||||
user.value = {
|
||||
userid: uuid,
|
||||
private_key: keypair.privateKey,
|
||||
public_key: keypair.publicKey,
|
||||
};
|
||||
const prvKeyString = await exportPrivateKey(keypair.privateKey);
|
||||
await savePrivateKeyToFile(prvKeyString,uuid+".pem")
|
||||
|
||||
|
||||
const pubKeyString = await exportPublicKey(keypair.publicKey);
|
||||
await $fetch(`/api/users/${uuid}`, {
|
||||
method: 'POST',
|
||||
body: { public_key: pubKeyString }
|
||||
});
|
||||
} catch (err) {
|
||||
user.value = null
|
||||
console.error("Failed to create new User!", err);
|
||||
}
|
||||
};
|
||||
const loadUser = async (event: Event) => {
|
||||
const target = event.target as HTMLInputElement;
|
||||
const file = target.files?.[0];
|
||||
|
||||
if (file) {
|
||||
try {
|
||||
const content = await file.text();
|
||||
console.log("File loaded: ");
|
||||
if (file.name && content) {
|
||||
try {
|
||||
const uuid = file.name.replace(".pem", "");
|
||||
// Standardize the string for the importer
|
||||
const pkBase64 = content.replace(/-----BEGIN PRIVATE KEY-----|-----END PRIVATE KEY-----/g, "").replace(/\s+/g, "");
|
||||
|
||||
const key = await stringToCryptoKey(pkBase64, "private");
|
||||
|
||||
user.value = {
|
||||
userid: uuid,
|
||||
private_key: key,
|
||||
public_key: undefined, // Note: You might need to import a pub key too!
|
||||
};
|
||||
|
||||
console.log("Login successful for:", uuid);
|
||||
} catch (err) {
|
||||
console.error("Crypto Import Error:", err);
|
||||
alert("The file content is not a valid Private Key.");
|
||||
}
|
||||
}
|
||||
} catch (e) {
|
||||
console.error("Failed to read file", e);
|
||||
}
|
||||
}
|
||||
};
|
||||
</script>
|
||||
@@ -1,83 +0,0 @@
|
||||
<style scoped>
|
||||
.poll-list {
|
||||
list-style: none;
|
||||
padding: 0;
|
||||
margin: 0;
|
||||
}
|
||||
|
||||
.poll-item {
|
||||
display: flex;
|
||||
justify-content: space-between;
|
||||
align-items: center;
|
||||
padding: 1rem;
|
||||
background: #f8fafc;
|
||||
border: 1px solid #e2e8f0;
|
||||
border-radius: 8px;
|
||||
margin-bottom: 0.5rem;
|
||||
}
|
||||
.poll-title {
|
||||
font-size: 1.1rem;
|
||||
color: #3b82f6;
|
||||
text-transform: uppercase;
|
||||
letter-spacing: 1px;
|
||||
}
|
||||
|
||||
.add-option-form {
|
||||
display: flex;
|
||||
gap: 0.5rem;
|
||||
margin-bottom: 2rem;
|
||||
}
|
||||
|
||||
.option-name { font-weight: 500; }
|
||||
.vote-section { display: flex; align-items: center; gap: 1rem; }
|
||||
.vote-count { font-size: 0.9rem; color: #475569; }
|
||||
.vote-btn { padding: 0.4rem 0.8rem; background: #10b981; }
|
||||
.vote-btn:hover { background: #059669; }
|
||||
|
||||
.vote-btn:disabled,
|
||||
.vote-btn[disabled] { background: #888888; }
|
||||
.vote-btn:disabled:hover,
|
||||
.vote-btn[disabled]:hover { background: #AAAAAA; }
|
||||
</style>
|
||||
|
||||
<template>
|
||||
<div>
|
||||
<h2 class="poll-title">Poll: {{ activePollId }}</h2>
|
||||
<p v-if="Object.keys(pollData).length==0">Note: Add at least one Option to save the Poll.</p>
|
||||
<form @submit.prevent="handleAddNewOption" class="add-option-form" v-if="userid">
|
||||
<input v-model="newOption" placeholder="Enter a new poll option..." required />
|
||||
<button type="submit">Add Option</button>
|
||||
</form>
|
||||
|
||||
<ul class="poll-list">
|
||||
<li v-for="(votes, optionName) in pollData" :key="optionName" class="poll-item">
|
||||
<span class="option-name">{{ optionName }}</span>
|
||||
<div class="vote-section">
|
||||
<span class="vote-count">{{ votes.length }} {{ votes.length === 1 ? 'vote' : 'votes' }}</span>
|
||||
<button @click="vote(String(optionName))" class="vote-btn" :disabled="userid==undefined || voted(votes)">+1</button>
|
||||
</div>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
</template>
|
||||
|
||||
<script setup lang="ts">
|
||||
import type { PollProps, SignedData, VoteData } from '@/utils/types'
|
||||
const props = defineProps<PollProps>()
|
||||
|
||||
const newOption = ref('');
|
||||
const handleAddNewOption = () => {
|
||||
props.addOption(newOption.value);
|
||||
newOption.value = '';
|
||||
};
|
||||
|
||||
|
||||
const voted = (votes: SignedData<VoteData>[]) => {
|
||||
for(let vote of votes){
|
||||
if(vote.data.userid == props.userid){
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
</script>
|
||||
@@ -1,64 +0,0 @@
|
||||
<style scoped>
|
||||
.poll-list { margin-top: 1rem; }
|
||||
.empty-state { text-align: center; color: #94a3b8; font-style: italic; }
|
||||
.create-poll { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; }
|
||||
.poll-links { list-style: none; padding: 0; }
|
||||
.poll-link-btn {
|
||||
width: 100%;
|
||||
text-align: left;
|
||||
background: #f1f5f9;
|
||||
color: #1e293b;
|
||||
margin-bottom: 0.5rem;
|
||||
display: flex;
|
||||
justify-content: space-between;
|
||||
}
|
||||
.poll-link-btn:hover { background: #e2e8f0; }
|
||||
</style>
|
||||
|
||||
<template>
|
||||
<div class="poll-list">
|
||||
<h3>Available Polls</h3>
|
||||
|
||||
<ul v-if="polls && polls.length > 0" class="poll-links">
|
||||
<li v-for="id in polls" :key="id">
|
||||
<button class="poll-link-btn" @click="$emit('select-poll', id)">
|
||||
{{ id }} <span>→</span>
|
||||
</button>
|
||||
</li>
|
||||
</ul>
|
||||
<p v-else class="empty-state">No polls found. Create the first one!</p>
|
||||
<div class="create-poll" v-if="userid !== undefined">
|
||||
<input
|
||||
v-model="newPollId"
|
||||
placeholder="Enter new poll name..."
|
||||
@keyup.enter="createPoll"
|
||||
/>
|
||||
<button @click="createPoll">Create & Join</button>
|
||||
</div>
|
||||
</div>
|
||||
</template>
|
||||
|
||||
<script setup lang="ts">
|
||||
import type { PollListProps } from '@/utils/types'
|
||||
const props = defineProps<PollListProps>()
|
||||
const newPollId = ref('');
|
||||
const polls = ref<string[]>([]);
|
||||
|
||||
// Fetch existing polls on mount
|
||||
const fetchPolls = async () => {
|
||||
const data = await $fetch<{ polls: string[] }>('/api/polls');
|
||||
polls.value = data.polls;
|
||||
};
|
||||
|
||||
const createPoll = () => {
|
||||
const id = newPollId.value.trim().toLowerCase().replace(/\s+/g, '-');
|
||||
if (id) {
|
||||
// In a real app, you might want to POST to create it first,
|
||||
// but here we just navigate to it and let usePoll handle the save.
|
||||
emit('select-poll', id);
|
||||
}
|
||||
};
|
||||
|
||||
const emit = defineEmits(['select-poll']);
|
||||
onMounted(fetchPolls);
|
||||
</script>
|
||||
@@ -1,131 +0,0 @@
|
||||
// composables/usePoll.ts
|
||||
import { ref, watch, onUnmounted } from 'vue';
|
||||
import * as Y from 'yjs';
|
||||
|
||||
export const usePoll = (pollId: Ref<string | null>, user: Ref<UserData | null>) => {
|
||||
const pollData = ref<PollData>({});
|
||||
const isConnected = ref(false);
|
||||
const connectionAttempFailed = ref(false);
|
||||
const connectedPeers = ref(1);
|
||||
|
||||
let ydoc: Y.Doc | null = null;
|
||||
let provider: any = null;
|
||||
let yMap: Y.Map<SignedData<VoteData>[]> | null = null;
|
||||
|
||||
const cleanup = () => {
|
||||
if (provider) provider.disconnect();
|
||||
if (ydoc) ydoc.destroy();
|
||||
isConnected.value = false;
|
||||
pollData.value = {};
|
||||
};
|
||||
|
||||
const initPoll = async (id: string) => {
|
||||
cleanup(); // Clear previous session
|
||||
|
||||
ydoc = new Y.Doc();
|
||||
|
||||
// 1. Fetch Snapshot from Nuxt API
|
||||
try {
|
||||
const response = await $fetch<{ update: number[] | null }>(`/api/polls/${id}`).catch((e) => {
|
||||
console.error("Failed to get poll: " + id,e)
|
||||
});
|
||||
//trust the server without verification.
|
||||
if (response?.update) {
|
||||
Y.applyUpdate(ydoc, new Uint8Array(response.update));
|
||||
}
|
||||
} catch (err) {
|
||||
console.error('Persistence fetch failed', err);
|
||||
}
|
||||
|
||||
yMap = ydoc.getMap<SignedData<VoteData>[]>('shared-poll');
|
||||
|
||||
// 2. Local State Sync
|
||||
yMap.observe(async () => {
|
||||
await performUpdateAndVerify();
|
||||
saveStateToServer(id);
|
||||
});
|
||||
await performUpdateAndVerify();
|
||||
|
||||
// 3. P2P Connection
|
||||
const { WebrtcProvider } = await import('y-webrtc');
|
||||
provider = new WebrtcProvider(`nuxt-p2p-${id}`, ydoc, {
|
||||
signaling: ["ws://localhost:4444", "ws://lynxpi.ddns.net:4444"]
|
||||
});
|
||||
|
||||
provider.on('synced', (arg: {synced: boolean}) => {
|
||||
isConnected.value = arg.synced;
|
||||
console.log('Connection synced:', arg.synced) // "connected" or "disconnected"
|
||||
});
|
||||
provider.on('status', (event: { connected: boolean }) => {
|
||||
console.log('Connection status:', event.connected) // "connected" or "disconnected"
|
||||
})
|
||||
provider.on('peers', (data: any) => {
|
||||
connectedPeers.value = data.webrtcPeers.length + 1
|
||||
});
|
||||
};
|
||||
|
||||
const saveStateToServer = async (id: string) => {
|
||||
if (!ydoc) return;
|
||||
const stateUpdate = Y.encodeStateAsUpdate(ydoc);
|
||||
await $fetch(`/api/polls/${id}`, {
|
||||
method: 'POST',
|
||||
body: { update: Array.from(stateUpdate) }
|
||||
}).catch((e) => {
|
||||
console.error("Failed to update poll",e)
|
||||
});
|
||||
};
|
||||
|
||||
// Watch for ID changes (e.g., user clicks a link or goes back)
|
||||
watch(pollId, (newId) => {
|
||||
if (newId && import.meta.client) {
|
||||
initPoll(newId);
|
||||
} else {
|
||||
cleanup();
|
||||
}
|
||||
}, { immediate: true });
|
||||
|
||||
onUnmounted(cleanup);
|
||||
|
||||
const addOption = (optionName: string) => {
|
||||
if (yMap && !yMap.has(optionName)) yMap.set(optionName, []);
|
||||
};
|
||||
|
||||
const performUpdateAndVerify = async () => {
|
||||
const pollDataUpdate = yMap!.toJSON();
|
||||
console.log("Poll Data Update: ", pollDataUpdate)
|
||||
for(var option in pollDataUpdate){
|
||||
console.log("verifying votes for option: " + option);
|
||||
const votes = pollDataUpdate[option] || [];
|
||||
const verified = await verifyAllVotesForOption(votes);
|
||||
if(!verified){
|
||||
console.error("Failed to verify option: "+option)
|
||||
return;
|
||||
}
|
||||
}
|
||||
console.log("All options verified! :)")
|
||||
pollData.value = pollDataUpdate
|
||||
}
|
||||
|
||||
const vote = async (optionName: string) => {
|
||||
const currentUser = user.value;
|
||||
if (currentUser != undefined && yMap?.has(optionName)) {
|
||||
const voteData = [...(yMap.get(optionName) || [])];
|
||||
if(voteData != undefined && currentUser.private_key){
|
||||
var unsignedVoteData : VoteData = {
|
||||
userid: currentUser.userid,
|
||||
timestamp: new Date().toISOString()
|
||||
}
|
||||
var newVote : SignedData<VoteData> = {
|
||||
data: unsignedVoteData,
|
||||
signature: "",
|
||||
}
|
||||
voteData?.push(newVote)
|
||||
const signature = await signVote(voteData,currentUser.private_key);
|
||||
newVote.signature=signature
|
||||
yMap?.set(optionName, voteData);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
return { pollData, isConnected, connectionAttempFailed, connectedPeers, addOption, vote };
|
||||
};
|
||||
@@ -1,2 +0,0 @@
|
||||
export const user = (user: Ref<UserData | null>) => {
|
||||
}
|
||||
@@ -1,187 +0,0 @@
|
||||
// utils/crypto.ts
|
||||
export const generateUserKeyPair = async () => {
|
||||
return await window.crypto.subtle.generateKey(
|
||||
{
|
||||
name: "RSASSA-PKCS1-v1_5",
|
||||
modulusLength: 2048,
|
||||
publicExponent: new Uint8Array([1, 0, 1]), // 65537
|
||||
hash: "SHA-256",
|
||||
},
|
||||
true, // extractable
|
||||
["sign", "verify"]
|
||||
);
|
||||
};
|
||||
|
||||
export const signVote = async (data: any, privateKey: CryptoKey) => {
|
||||
const encoder = new TextEncoder();
|
||||
const encodedData = encoder.encode(JSON.stringify(data));
|
||||
|
||||
const signature = await window.crypto.subtle.sign(
|
||||
"RSASSA-PKCS1-v1_5",
|
||||
privateKey,
|
||||
encodedData
|
||||
);
|
||||
|
||||
// Convert to Base64 or Hex to store in Yjs easily
|
||||
return btoa(String.fromCharCode(...new Uint8Array(signature)));
|
||||
};
|
||||
|
||||
export const verifyVote = async (data: any, signatureStr: string, publicKey: CryptoKey) => {
|
||||
const encoder = new TextEncoder();
|
||||
const encodedData = encoder.encode(JSON.stringify(data));
|
||||
|
||||
// Convert Base64 back to Uint8Array
|
||||
const signature = Uint8Array.from(atob(signatureStr), c => c.charCodeAt(0));
|
||||
|
||||
return await window.crypto.subtle.verify(
|
||||
"RSASSA-PKCS1-v1_5",
|
||||
publicKey,
|
||||
signature,
|
||||
encodedData
|
||||
);
|
||||
};
|
||||
|
||||
/**
|
||||
* Verifies a specific vote within an array of votes by
|
||||
* reconstructing the "signed state" at that point in time.
|
||||
*/
|
||||
export const verifyChainedVote = async (
|
||||
voteData: SignedData<VoteData>[],
|
||||
index: number
|
||||
) => {
|
||||
const voteToVerify = voteData[index];
|
||||
console.log("Verifying vote: " + voteToVerify)
|
||||
if(voteToVerify) {
|
||||
// 1. Reconstruct the exact data state the user signed
|
||||
// We need the array exactly as it was when they pushed their vote
|
||||
const historicalState = voteData.slice(0, index + 1).map((v, i) => {
|
||||
if (i === index) {
|
||||
// For the current vote, the signature must be empty string
|
||||
// because it wasn't signed yet when passed to signVote
|
||||
return { ...v, signature: "" };
|
||||
}
|
||||
return v;
|
||||
});
|
||||
|
||||
try {
|
||||
// 2. Fetch public key
|
||||
const response = await $fetch<{ public_key: string }>(`/api/users/${voteToVerify.data.userid}`);
|
||||
console.log("Got key: ",response)
|
||||
const pubKey = await stringToCryptoKey(response.public_key, 'public');
|
||||
|
||||
console.log("Using pubKey to verify Vote.")
|
||||
// 3. Verify: Does this historicalState match the signature?
|
||||
return await verifyVote(historicalState, voteToVerify.signature, pubKey);
|
||||
} catch (err) {
|
||||
console.error("Verification failed")
|
||||
console.error(err);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
console.error("Vote is undefined or null");
|
||||
return false;
|
||||
};
|
||||
|
||||
export const verifyAllVotesForOption = async (votes: SignedData<VoteData>[]) => {
|
||||
console.log("verifying votes for option ",votes);
|
||||
for (let i = votes.length-1; i >= 0 ; i--) {
|
||||
const isValid = await verifyChainedVote(votes, i);
|
||||
if(!isValid){
|
||||
console.error("Error! Invalid Vote at: " + i,votes)
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
};
|
||||
|
||||
// Helper to convert ArrayBuffer to Base64 string
|
||||
const bufferToBase64 = (buf: ArrayBuffer) =>
|
||||
window.btoa(String.fromCharCode(...new Uint8Array(buf)));
|
||||
|
||||
export const exportPublicKey = async (key: CryptoKey) => {
|
||||
// Export Public Key
|
||||
const exportedPublic = await window.crypto.subtle.exportKey("spki", key);
|
||||
const publicKeyString = bufferToBase64(exportedPublic);
|
||||
|
||||
return publicKeyString;
|
||||
};
|
||||
export const exportPrivateKey = async (key: CryptoKey) => {
|
||||
// Export Private Key
|
||||
const exportedPrivate = await window.crypto.subtle.exportKey("pkcs8", key);
|
||||
const privateKeyString = bufferToBase64(exportedPrivate);
|
||||
|
||||
return privateKeyString;
|
||||
};
|
||||
|
||||
/**
|
||||
* Converts a Base64 string back into a usable CryptoKey object
|
||||
* @param keyStr The Base64 string (without PEM headers)
|
||||
* @param type 'public' or 'private'
|
||||
*/
|
||||
export const stringToCryptoKey = async (keyStr: string, type: 'public' | 'private'): Promise<CryptoKey> => {
|
||||
// 1. Convert Base64 string to a Uint8Array (binary)
|
||||
const binaryString = window.atob(keyStr);
|
||||
const bytes = new Uint8Array(binaryString.length);
|
||||
for (let i = 0; i < binaryString.length; i++) {
|
||||
bytes[i] = binaryString.charCodeAt(i);
|
||||
}
|
||||
|
||||
// 2. Identify the format based on the key type
|
||||
// Public keys usually use 'spki', Private keys use 'pkcs8'
|
||||
const format = type === 'public' ? 'spki' : 'pkcs8';
|
||||
const usages: KeyUsage[] = type === 'public' ? ['verify'] : ['sign'];
|
||||
|
||||
// 3. Import the key
|
||||
return await window.crypto.subtle.importKey(
|
||||
format,
|
||||
bytes.buffer,
|
||||
{
|
||||
name: "RSASSA-PKCS1-v1_5",
|
||||
hash: "SHA-256",
|
||||
},
|
||||
true, // extractable (set to false if you want to lock it in memory)
|
||||
usages
|
||||
);
|
||||
};
|
||||
|
||||
export const savePrivateKeyToFile = (privateKeyStr: string, filename: string) => {
|
||||
// Optional: Wrap in PEM headers for standard formatting
|
||||
const pemHeader = "-----BEGIN PRIVATE KEY-----\n";
|
||||
const pemFooter = "\n-----END PRIVATE KEY-----";
|
||||
const fileContent = pemHeader + privateKeyStr + pemFooter;
|
||||
|
||||
const blob = new Blob([fileContent], { type: "text/plain" });
|
||||
const url = URL.createObjectURL(blob);
|
||||
|
||||
const link = document.createElement("a");
|
||||
link.href = url;
|
||||
link.download = filename;
|
||||
|
||||
document.body.appendChild(link);
|
||||
link.click();
|
||||
|
||||
// Cleanup
|
||||
document.body.removeChild(link);
|
||||
URL.revokeObjectURL(url);
|
||||
};
|
||||
|
||||
export const loadPrivateKeyFromFile = async (file: File): Promise<string> => {
|
||||
return new Promise((resolve, reject) => {
|
||||
const reader = new FileReader();
|
||||
|
||||
reader.onload = (e) => {
|
||||
const content = e.target?.result as string;
|
||||
|
||||
// Clean up the string by removing PEM headers and newlines
|
||||
const cleanKey = content
|
||||
.replace("-----BEGIN PRIVATE KEY-----", "")
|
||||
.replace("-----END PRIVATE KEY-----", "")
|
||||
.replace(/\s+/g, ""); // Removes all whitespace/newlines
|
||||
|
||||
resolve(cleanKey);
|
||||
};
|
||||
|
||||
reader.onerror = () => reject("Error reading file");
|
||||
reader.readAsText(file);
|
||||
});
|
||||
};
|
||||
@@ -1,36 +0,0 @@
|
||||
export interface PollProps {
|
||||
userid: string | undefined,
|
||||
activePollId: string,
|
||||
pollData: PollData,
|
||||
addOption: (name: string) => void,
|
||||
vote: (optionName: string) => void
|
||||
}
|
||||
|
||||
export interface PollListProps {
|
||||
userid: string | undefined,
|
||||
}
|
||||
|
||||
export interface PollData extends Record<string, SignedData<VoteData>[]> {
|
||||
}
|
||||
|
||||
export interface SignedData<T> {
|
||||
data: T,
|
||||
signature: string
|
||||
}
|
||||
|
||||
export interface VoteData {
|
||||
userid: string,
|
||||
timestamp: string
|
||||
}
|
||||
|
||||
export interface OptionData {
|
||||
userid: string,
|
||||
timestamp: string,
|
||||
optionName: string
|
||||
}
|
||||
|
||||
export interface UserData {
|
||||
userid: string,
|
||||
private_key: CryptoKey | undefined,
|
||||
public_key: CryptoKey | undefined
|
||||
}
|
||||
31
backend.js
Normal file
31
backend.js
Normal file
@@ -0,0 +1,31 @@
|
||||
import { WebSocketServer } from 'ws';
|
||||
import { setupWSConnection } from './utils.js'
|
||||
|
||||
// Create a WebSocket server
|
||||
const WS_PORT = 8080;
|
||||
const wss = new WebSocketServer({ port: WS_PORT });
|
||||
|
||||
console.log('WebSocket server is running on ws://localhost:' + String(WS_PORT));
|
||||
|
||||
// Connection event handler
|
||||
wss.on('connection', setupWSConnection);
|
||||
/*
|
||||
wss.on('connection', (ws) => {
|
||||
console.log('Client connected');
|
||||
|
||||
// Message event handler
|
||||
ws.on('message', (message) => {
|
||||
let msg_str = String(message);
|
||||
console.log("Received: " + msg_str);
|
||||
|
||||
// If this is a text or state message (no Yjs logic) - echo the message back to the client
|
||||
if (msg_str.startsWith("TEXT_MESSAGE") | msg_str.startsWith("STATE_MESSAGE")) {
|
||||
ws.send(msg_str);
|
||||
}
|
||||
});
|
||||
|
||||
// Close event handler
|
||||
ws.on('close', () => {
|
||||
console.log('Client disconnected');
|
||||
});
|
||||
});*/
|
||||
196
frontend.html
Normal file
196
frontend.html
Normal file
@@ -0,0 +1,196 @@
|
||||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>Poll Client</title>
|
||||
<style>
|
||||
body {
|
||||
font-family: Arial, sans-serif;
|
||||
max-width: 600px;
|
||||
margin: 0 auto;
|
||||
padding: 20px;
|
||||
}
|
||||
#messages {
|
||||
height: 300px;
|
||||
border: 1px solid #ccc;
|
||||
overflow-y: auto;
|
||||
padding: 10px;
|
||||
margin-bottom: 10px;
|
||||
}
|
||||
.message { margin: 5px 0; }
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<h1>Poll Client</h1>
|
||||
<div id="status">Connecting to server...</div>
|
||||
<div id="status2">Connecting to server...</div>
|
||||
<div id="messages"></div>
|
||||
<div>
|
||||
<input type="text" id="messageInput" placeholder="Type your message">
|
||||
<!--button onclick="sendMessage()">Send</button-->
|
||||
<button id="sendBtn">Send</button>
|
||||
<input id="optionInput" placeholder="Add option">
|
||||
<button id="addBtn">Add</button>
|
||||
<ul id="options"></ul>
|
||||
</div>
|
||||
|
||||
<script type="module">
|
||||
import * as Y from "https://esm.sh/yjs"
|
||||
import { WebsocketProvider } from "https://esm.sh/y-websocket"
|
||||
|
||||
const WS_PORT = 8080;
|
||||
const ydoc = new Y.Doc();
|
||||
const status = document.getElementById('status');
|
||||
const status2 = document.getElementById('status2');
|
||||
const messages = document.getElementById('messages');
|
||||
const messageInput = document.getElementById('messageInput');
|
||||
|
||||
// Connect to the backend (WebSocket server) via Yjs WebsocketProvider
|
||||
const wsp = new WebsocketProvider(
|
||||
'ws://localhost:' + String(WS_PORT), 'poll-room',
|
||||
ydoc
|
||||
)
|
||||
wsp.on('status', event => {
|
||||
//console.log("event.status =", event.status)
|
||||
if (event.status == "connected") {
|
||||
status.textContent = 'Yjs connected to WebSocket server';
|
||||
status.style.color = 'green';
|
||||
}
|
||||
else {
|
||||
status.textContent = 'Yjs disonnected from WebSocket server';
|
||||
status.style.color = 'red';
|
||||
}
|
||||
})
|
||||
wsp.onopen = () => {
|
||||
console.log('connected to y-websocket server');
|
||||
};
|
||||
ydoc.on('update', () => {
|
||||
console.log('Yjs document updated locally');
|
||||
});
|
||||
wsp.on('sync', isSynced => {
|
||||
console.log("isSynced =", isSynced)
|
||||
})
|
||||
|
||||
// Connect to the backend (WebSocket server) via common WebSocket (only for informative messages)
|
||||
const ws = new WebSocket('ws://localhost:' + String(WS_PORT));
|
||||
ws.onopen = () => {
|
||||
status2.textContent = 'WebSocket client connected to WebSocket server';
|
||||
status2.style.color = 'green';
|
||||
};
|
||||
ws.onmessage = (event) => {
|
||||
const message = document.createElement('div');
|
||||
message.className = 'message';
|
||||
message.textContent = event.data;
|
||||
messages.appendChild(message);
|
||||
messages.scrollTop = messages.scrollHeight;
|
||||
};
|
||||
ws.onerror = (error) => {
|
||||
status2.textContent = 'Error: ' + error.message;
|
||||
status2.style.color = 'red';
|
||||
};
|
||||
ws.onclose = () => {
|
||||
status2.textContent = 'WebSocket client disconnected from WebSocket server';
|
||||
status2.style.color = 'red';
|
||||
};
|
||||
|
||||
// Function to send a message
|
||||
function sendMessage(command, payload) {
|
||||
let message = "";
|
||||
if (command === "TEXT_MESSAGE") {
|
||||
message = command + ":" + messageInput.value.trim();
|
||||
messageInput.value = "";
|
||||
}
|
||||
else if (command.startsWith("STATE_MESSAGE--")) {
|
||||
message = command + ":" + payload;
|
||||
}
|
||||
else {
|
||||
console.log("Error: unknown command '" + command + "'")
|
||||
}
|
||||
|
||||
if (message) {
|
||||
/* To make compatible with y-websocket-server API:
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageTextMessage)
|
||||
syncProtocol.writeUpdate(encoder, update)
|
||||
enc_message = encoding.toUint8Array(encoder)*/
|
||||
ws.send(message);
|
||||
}
|
||||
}
|
||||
|
||||
// Send message on button click
|
||||
document.getElementById("sendBtn").onclick = () => {
|
||||
sendMessage("TEXT_MESSAGE", "");
|
||||
};
|
||||
|
||||
// Send message on Enter key
|
||||
messageInput.addEventListener('keypress', (e) => {
|
||||
if (e.key === 'Enter') {
|
||||
sendMessage("TEXT_MESSAGE", "");
|
||||
}
|
||||
});
|
||||
|
||||
// Actual poll logic
|
||||
const optionsMap = ydoc.getMap("options");
|
||||
|
||||
const optionsList = document.getElementById("options");
|
||||
const input = document.getElementById("optionInput");
|
||||
|
||||
function render() {
|
||||
optionsList.innerHTML = ""
|
||||
|
||||
optionsMap.forEach((vote, name) => {
|
||||
// List element for this option
|
||||
const li = document.createElement("li")
|
||||
|
||||
// Label for this option
|
||||
const label = document.createElement("span")
|
||||
label.textContent = name + " — " + vote + " "
|
||||
|
||||
// "Vote"/"Unvote" button
|
||||
const voteBtn = document.createElement("button")
|
||||
if (vote == false) {
|
||||
voteBtn.textContent = "Vote"
|
||||
}
|
||||
else {
|
||||
voteBtn.textContent = "Unvote"
|
||||
}
|
||||
voteBtn.onclick = () => {
|
||||
vote = !vote;
|
||||
optionsMap.set(name, vote);
|
||||
sendMessage("STATE_MESSAGE--" + (vote ? "VOTE" : "UNVOTE"), name);
|
||||
}
|
||||
|
||||
// "Remove" button
|
||||
const removeBtn = document.createElement("button")
|
||||
removeBtn.textContent = "Remove"
|
||||
removeBtn.onclick = () => {
|
||||
optionsMap.delete(name);
|
||||
sendMessage("STATE_MESSAGE--REMOVE", name);
|
||||
}
|
||||
|
||||
li.appendChild(label)
|
||||
li.appendChild(voteBtn)
|
||||
li.appendChild(removeBtn)
|
||||
|
||||
optionsList.appendChild(li)
|
||||
})
|
||||
};
|
||||
|
||||
document.getElementById("addBtn").onclick = () => {
|
||||
const name = input.value.trim()
|
||||
|
||||
if (!name) return
|
||||
|
||||
if (!optionsMap.has(name)) {
|
||||
optionsMap.set(name, false);
|
||||
sendMessage("STATE_MESSAGE--ADD_OPTION", name);
|
||||
}
|
||||
|
||||
input.value = ""
|
||||
};
|
||||
|
||||
optionsMap.observe(render);
|
||||
|
||||
render();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
@@ -1,23 +0,0 @@
|
||||
// https://nuxt.com/docs/api/configuration/nuxt-config
|
||||
export default defineNuxtConfig({
|
||||
compatibilityDate: '2025-07-15',
|
||||
devtools: { enabled: true },
|
||||
vite: {
|
||||
optimizeDeps: {
|
||||
include: ['yjs', 'y-webrtc']
|
||||
}
|
||||
},
|
||||
// ... existing config
|
||||
nitro: {
|
||||
storage: {
|
||||
polls: {
|
||||
driver: 'fs',
|
||||
base: './.data/polls'
|
||||
},
|
||||
users: {
|
||||
driver: 'fs',
|
||||
base: './.data/users'
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
10064
package-lock.json
generated
10064
package-lock.json
generated
File diff suppressed because it is too large
Load Diff
26
package.json
26
package.json
@@ -1,20 +1,20 @@
|
||||
{
|
||||
"name": "p2p-poll",
|
||||
"name": "yjs-poll",
|
||||
"version": "1.0.0",
|
||||
"main": "index.js",
|
||||
"type": "module",
|
||||
"private": true,
|
||||
"scripts": {
|
||||
"build": "nuxt build",
|
||||
"dev": "PORT=4444 npx y-webrtc & nuxt dev",
|
||||
"generate": "nuxt generate",
|
||||
"preview": "nuxt preview",
|
||||
"postinstall": "nuxt prepare"
|
||||
"test": "echo \"Error: no test specified\" && exit 1",
|
||||
"y-websocket": "y-websocket"
|
||||
},
|
||||
"keywords": [],
|
||||
"author": "",
|
||||
"license": "ISC",
|
||||
"description": "",
|
||||
"dependencies": {
|
||||
"nuxt": "^4.1.3",
|
||||
"uuid": "^13.0.0",
|
||||
"vue": "^3.5.30",
|
||||
"vue-router": "^5.0.3",
|
||||
"y-webrtc": "^10.3.0",
|
||||
"yjs": "^13.6.30"
|
||||
"ws": "^8.19.0",
|
||||
"@y/protocols": "^1.0.6-1",
|
||||
"lib0": "^0.2.102",
|
||||
"yjs": "^14.0.0-7"
|
||||
}
|
||||
}
|
||||
|
||||
Binary file not shown.
|
Before Width: | Height: | Size: 4.2 KiB |
@@ -1,2 +0,0 @@
|
||||
User-Agent: *
|
||||
Disallow:
|
||||
@@ -1,68 +0,0 @@
|
||||
import * as Y from 'yjs';
|
||||
// server/api/polls/[id].ts
|
||||
export default defineEventHandler(async (event) => {
|
||||
const method = event.node.req.method;
|
||||
const pollId = getRouterParam(event, 'id');
|
||||
|
||||
// We use Nitro's built-in storage.
|
||||
// 'polls' is the storage namespace.
|
||||
const storage = useStorage('polls');
|
||||
|
||||
if (!pollId) {
|
||||
throw createError({ statusCode: 400, statusMessage: 'Poll ID required' });
|
||||
}
|
||||
|
||||
// GET: Fetch the saved Yjs document state
|
||||
if (method === 'GET') {
|
||||
const data = await storage.getItem(`poll:${pollId}`);
|
||||
// Return the array of numbers (or null if it doesn't exist yet)
|
||||
return { update: data || null };
|
||||
}
|
||||
|
||||
// POST: Save a new Yjs document state
|
||||
if (method === 'POST') {
|
||||
const body = await readBody(event);
|
||||
|
||||
if (body.update && Array.isArray(body.update)) {
|
||||
// create a temp Y.Doc to encode the Data
|
||||
const tempDoc = new Y.Doc();
|
||||
Y.applyUpdate(tempDoc, new Uint8Array(body.update));
|
||||
const yMap = tempDoc.getMap('shared-poll');
|
||||
const pollData = yMap.toJSON();
|
||||
|
||||
// verify pollData
|
||||
for(var option in pollData){
|
||||
const votes = pollData[option] || [];
|
||||
var pubKeys: CryptoKey[] = [];
|
||||
|
||||
const verifyAllVotesForOption = async (votes: SignedData<VoteData>[]) => {
|
||||
console.log("verifying votes for option " + option,votes);
|
||||
// check last votes first. if there is something wrong, its likely in the last vote.
|
||||
for (let i = votes.length-1; i >= 0 ; i--) {
|
||||
const userStorage = useStorage('users');
|
||||
const votePubKeyString = await userStorage.getItem(`user:${votes[i]?.data.userid}`);
|
||||
//console.log("Using public key: "+votePubKeyString)
|
||||
const votePubKey = await stringToCryptoKey(String(votePubKeyString),'public')
|
||||
const isValid = await verifyChainedVote(votes, i,votePubKey);
|
||||
if(!isValid){
|
||||
console.error("Error! Invalid Vote at: " + i,votes)
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
};
|
||||
const verified = await verifyAllVotesForOption(votes);
|
||||
if(!verified){
|
||||
console.error("Failed to verify option: "+option)
|
||||
throw createError({ statusCode: 400, statusMessage: 'PollData contains unverifyable content!' });
|
||||
}
|
||||
}
|
||||
|
||||
// Save the binary update (sent as an array of numbers) to storage
|
||||
await storage.setItem(`poll:${pollId}`, body.update);
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
throw createError({ statusCode: 400, statusMessage: 'Invalid update payload' });
|
||||
}
|
||||
});
|
||||
@@ -1,15 +0,0 @@
|
||||
// server/api/polls/index.get.ts
|
||||
export default defineEventHandler(async () => {
|
||||
const storage = useStorage('polls');
|
||||
|
||||
// Get all keys in the 'polls' namespace
|
||||
const allKeys = await storage.getKeys();
|
||||
|
||||
// Filter for our specific poll prefix and strip it for the UI
|
||||
// poll:my-id -> my-id
|
||||
const polls = allKeys
|
||||
.filter(key => key.startsWith('poll:'))
|
||||
.map(key => key.replace('poll:', ''));
|
||||
|
||||
return { polls };
|
||||
});
|
||||
@@ -1,41 +0,0 @@
|
||||
// server/api/users/[id].ts
|
||||
export default defineEventHandler(async (event) => {
|
||||
const method = event.node.req.method;
|
||||
const userId = getRouterParam(event, 'id');
|
||||
|
||||
// We use Nitro's built-in storage.
|
||||
// 'polls' is the storage namespace.
|
||||
const storage = useStorage('users');
|
||||
|
||||
if (!userId) {
|
||||
throw createError({ statusCode: 400, statusMessage: 'User ID required' });
|
||||
}
|
||||
|
||||
// GET: Fetch the saved Yjs document state
|
||||
if (method === 'GET') {
|
||||
const data = await storage.getItem(`user:${userId}`);
|
||||
// Return the array of numbers (or null if it doesn't exist yet)
|
||||
return { public_key: data };
|
||||
}
|
||||
|
||||
// POST: Save a new Yjs document state
|
||||
if (method === 'POST') {
|
||||
const body = await readBody(event);
|
||||
|
||||
if (body.public_key) {
|
||||
const data = await storage.getItem(`user:${userId}`);
|
||||
|
||||
if (data == undefined || data == null) {
|
||||
// Save the binary update (sent as an array of numbers) to storage
|
||||
await storage.setItem(`user:${userId}`, body.public_key);
|
||||
console.log("New User created: " + userId)
|
||||
console.log("Public Key: " + body.public_key);
|
||||
return { success: true };
|
||||
}
|
||||
|
||||
throw createError({ statusCode: 400, statusMessage: 'User already exists.' });
|
||||
}
|
||||
|
||||
throw createError({ statusCode: 400, statusMessage: 'Invalid update payload' });
|
||||
}
|
||||
});
|
||||
@@ -1,86 +0,0 @@
|
||||
import { SignedData, VoteData } from "./types";
|
||||
/**
|
||||
* Gets the WebCrypto API regardless of environment (Node vs Browser)
|
||||
*/
|
||||
const getCrypto = () => {
|
||||
return (globalThis as any).crypto;
|
||||
};
|
||||
|
||||
export const verifyVote = async (data: any, signatureStr: string, publicKey: CryptoKey) => {
|
||||
const encoder = new TextEncoder();
|
||||
const encodedData = encoder.encode(JSON.stringify(data));
|
||||
|
||||
// Convert Base64 back to Uint8Array
|
||||
const signature = Uint8Array.from(atob(signatureStr), c => c.charCodeAt(0));
|
||||
|
||||
return await getCrypto().subtle.verify(
|
||||
"RSASSA-PKCS1-v1_5",
|
||||
publicKey,
|
||||
signature,
|
||||
encodedData
|
||||
);
|
||||
};
|
||||
|
||||
/**
|
||||
* Verifies a specific vote within an array of votes by
|
||||
* reconstructing the "signed state" at that point in time.
|
||||
*/
|
||||
export const verifyChainedVote = async (
|
||||
voteData: SignedData<VoteData>[],
|
||||
index: number,
|
||||
pubKey: CryptoKey
|
||||
) => {
|
||||
const voteToVerify = voteData[index];
|
||||
console.log("Verifying vote: " + voteToVerify)
|
||||
if(voteToVerify) {
|
||||
// 1. Reconstruct the exact data state the user signed
|
||||
// We need the array exactly as it was when they pushed their vote
|
||||
const historicalState = voteData.slice(0, index + 1).map((v, i) => {
|
||||
if (i === index) {
|
||||
// For the current vote, the signature must be empty string
|
||||
// because it wasn't signed yet when passed to signVote
|
||||
return { ...v, signature: "" };
|
||||
}
|
||||
return v;
|
||||
});
|
||||
|
||||
try {
|
||||
// 3. Verify: Does this historicalState match the signature?
|
||||
return await verifyVote(historicalState, voteToVerify.signature, pubKey);
|
||||
} catch (err) {
|
||||
console.error("Verification failed")
|
||||
console.error(err);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
console.error("Vote is undefined or null");
|
||||
return false;
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Converts a Base64 string back into a usable CryptoKey object
|
||||
* @param keyStr The Base64 string (without PEM headers)
|
||||
* @param type 'public' or 'private'
|
||||
*/
|
||||
export const stringToCryptoKey = async (keyStr: string, type: 'public' | 'private'): Promise<CryptoKey> => {
|
||||
// 1. Convert Base64 string to a Uint8Array (binary)
|
||||
const bytes = Buffer.from(keyStr, 'base64');
|
||||
|
||||
// 2. Identify the format based on the key type
|
||||
// Public keys usually use 'spki', Private keys use 'pkcs8'
|
||||
const format = type === 'public' ? 'spki' : 'pkcs8';
|
||||
const usages: KeyUsage[] = type === 'public' ? ['verify'] : ['sign'];
|
||||
|
||||
// 3. Import the key
|
||||
return await getCrypto().subtle.importKey(
|
||||
format,
|
||||
bytes,
|
||||
{
|
||||
name: "RSASSA-PKCS1-v1_5",
|
||||
hash: "SHA-256",
|
||||
},
|
||||
true, // extractable (set to false if you want to lock it in memory)
|
||||
usages
|
||||
);
|
||||
};
|
||||
@@ -1,36 +0,0 @@
|
||||
export interface PollProps {
|
||||
userid: string | undefined,
|
||||
activePollId: string,
|
||||
pollData: PollData,
|
||||
addOption: (name: string) => void,
|
||||
vote: (optionName: string) => void
|
||||
}
|
||||
|
||||
export interface PollListProps {
|
||||
userid: string | undefined,
|
||||
}
|
||||
|
||||
export interface PollData extends Record<string, SignedData<VoteData>[]> {
|
||||
}
|
||||
|
||||
export interface SignedData<T> {
|
||||
data: T,
|
||||
signature: string
|
||||
}
|
||||
|
||||
export interface VoteData {
|
||||
userid: string,
|
||||
timestamp: string
|
||||
}
|
||||
|
||||
export interface OptionData {
|
||||
userid: string,
|
||||
timestamp: string,
|
||||
optionName: string
|
||||
}
|
||||
|
||||
export interface UserData {
|
||||
userid: string,
|
||||
private_key: CryptoKey | undefined,
|
||||
public_key: CryptoKey | undefined
|
||||
}
|
||||
@@ -1,18 +0,0 @@
|
||||
{
|
||||
// https://nuxt.com/docs/guide/concepts/typescript
|
||||
"files": [],
|
||||
"references": [
|
||||
{
|
||||
"path": "./.nuxt/tsconfig.app.json"
|
||||
},
|
||||
{
|
||||
"path": "./.nuxt/tsconfig.server.json"
|
||||
},
|
||||
{
|
||||
"path": "./.nuxt/tsconfig.shared.json"
|
||||
},
|
||||
{
|
||||
"path": "./.nuxt/tsconfig.node.json"
|
||||
}
|
||||
]
|
||||
}
|
||||
291
utils.js
Normal file
291
utils.js
Normal file
@@ -0,0 +1,291 @@
|
||||
/* Adapted from https://github.com/yjs/y-websocket-server/blob/main/src/server.js, version of 2025-04-02
|
||||
(author: dmonad/Kevin Jahns, MIT license) */
|
||||
|
||||
import * as Y from 'yjs'
|
||||
import * as syncProtocol from '@y/protocols/sync'
|
||||
import * as awarenessProtocol from '@y/protocols/awareness'
|
||||
|
||||
import * as encoding from 'lib0/encoding'
|
||||
import * as decoding from 'lib0/decoding'
|
||||
import * as map from 'lib0/map'
|
||||
|
||||
import * as eventloop from 'lib0/eventloop'
|
||||
|
||||
/*import { callbackHandler, isCallbackSet } from './callback.js'
|
||||
|
||||
const CALLBACK_DEBOUNCE_WAIT = parseInt(process.env.CALLBACK_DEBOUNCE_WAIT || '2000')
|
||||
const CALLBACK_DEBOUNCE_MAXWAIT = parseInt(process.env.CALLBACK_DEBOUNCE_MAXWAIT || '10000')
|
||||
|
||||
const debouncer = eventloop.createDebouncer(CALLBACK_DEBOUNCE_WAIT, CALLBACK_DEBOUNCE_MAXWAIT)*/
|
||||
|
||||
const wsReadyStateConnecting = 0
|
||||
const wsReadyStateOpen = 1
|
||||
const wsReadyStateClosing = 2 // eslint-disable-line
|
||||
const wsReadyStateClosed = 3 // eslint-disable-line
|
||||
|
||||
// disable gc when using snapshots!
|
||||
const gcEnabled = process.env.GC !== 'false' && process.env.GC !== '0'
|
||||
// const persistenceDir = process.env.YPERSISTENCE
|
||||
/**
|
||||
* @type {{bindState: function(string,WSSharedDoc):void, writeState:function(string,WSSharedDoc):Promise<any>, provider: any}|null}
|
||||
*/
|
||||
let persistence = null
|
||||
|
||||
/**
|
||||
* @param {{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>,provider:any}|null} persistence_
|
||||
*/
|
||||
export const setPersistence = persistence_ => {
|
||||
persistence = persistence_
|
||||
}
|
||||
|
||||
/**
|
||||
* @return {null|{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>}|null} used persistence layer
|
||||
*/
|
||||
export const getPersistence = () => persistence
|
||||
|
||||
/**
|
||||
* @type {Map<string,WSSharedDoc>}
|
||||
*/
|
||||
export const docs = new Map()
|
||||
|
||||
const messageSync = 0
|
||||
const messageAwareness = 1
|
||||
// const messageAuth = 2
|
||||
//const messageTextMessage = 3
|
||||
//const messageStateMessage = 4
|
||||
|
||||
/**
|
||||
* @param {Uint8Array} update
|
||||
* @param {any} _origin
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} _tr
|
||||
*/
|
||||
const updateHandler = (update, _origin, doc, _tr) => {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeUpdate(encoder, update)
|
||||
const message = encoding.toUint8Array(encoder)
|
||||
doc.conns.forEach((_, conn) => send(doc, conn, message))
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {(ydoc: Y.Doc) => Promise<void>}
|
||||
*/
|
||||
let contentInitializor = _ydoc => Promise.resolve()
|
||||
|
||||
/**
|
||||
* This function is called once every time a Yjs document is created. You can
|
||||
* use it to pull data from an external source or initialize content.
|
||||
*
|
||||
* @param {(ydoc: Y.Doc) => Promise<void>} f
|
||||
*/
|
||||
export const setContentInitializor = (f) => {
|
||||
contentInitializor = f
|
||||
}
|
||||
|
||||
export class WSSharedDoc extends Y.Doc {
|
||||
/**
|
||||
* @param {string} name
|
||||
*/
|
||||
constructor (name) {
|
||||
super({ gc: gcEnabled })
|
||||
this.name = name
|
||||
/**
|
||||
* Maps from conn to set of controlled user ids. Delete all user ids from awareness when this conn is closed
|
||||
* @type {Map<Object, Set<number>>}
|
||||
*/
|
||||
this.conns = new Map()
|
||||
/**
|
||||
* @type {awarenessProtocol.Awareness}
|
||||
*/
|
||||
this.awareness = new awarenessProtocol.Awareness(this)
|
||||
this.awareness.setLocalState(null)
|
||||
/**
|
||||
* @param {{ added: Array<number>, updated: Array<number>, removed: Array<number> }} changes
|
||||
* @param {Object | null} conn Origin is the connection that made the change
|
||||
*/
|
||||
const awarenessChangeHandler = ({ added, updated, removed }, conn) => {
|
||||
const changedClients = added.concat(updated, removed)
|
||||
if (conn !== null) {
|
||||
const connControlledIDs = /** @type {Set<number>} */ (this.conns.get(conn))
|
||||
if (connControlledIDs !== undefined) {
|
||||
added.forEach(clientID => { connControlledIDs.add(clientID) })
|
||||
removed.forEach(clientID => { connControlledIDs.delete(clientID) })
|
||||
}
|
||||
}
|
||||
// broadcast awareness update
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(this.awareness, changedClients))
|
||||
const buff = encoding.toUint8Array(encoder)
|
||||
this.conns.forEach((_, c) => {
|
||||
send(this, c, buff)
|
||||
})
|
||||
}
|
||||
this.awareness.on('update', awarenessChangeHandler)
|
||||
this.on('update', /** @type {any} */ (updateHandler))
|
||||
//if (isCallbackSet) {
|
||||
// this.on('update', (_update, _origin, doc) => {
|
||||
// debouncer(() => callbackHandler(/** @type {WSSharedDoc} */ (doc)))
|
||||
// })
|
||||
//}
|
||||
this.whenInitialized = contentInitializor(this)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets a Y.Doc by name, whether in memory or on disk
|
||||
*
|
||||
* @param {string} docname - the name of the Y.Doc to find or create
|
||||
* @param {boolean} gc - whether to allow gc on the doc (applies only when created)
|
||||
* @return {WSSharedDoc}
|
||||
*/
|
||||
export const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () => {
|
||||
const doc = new WSSharedDoc(docname)
|
||||
doc.gc = gc
|
||||
if (persistence !== null) {
|
||||
persistence.bindState(docname, doc)
|
||||
}
|
||||
docs.set(docname, doc)
|
||||
return doc
|
||||
})
|
||||
|
||||
/**
|
||||
* @param {any} conn
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {Uint8Array} message
|
||||
*/
|
||||
const messageListener = (conn, doc, message) => {
|
||||
try {
|
||||
const encoder = encoding.createEncoder()
|
||||
const decoder = decoding.createDecoder(new Uint8Array(message))
|
||||
const messageType = decoding.readVarUint(decoder)
|
||||
switch (messageType) {
|
||||
case messageSync:
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.readSyncMessage(decoder, encoder, doc, conn)
|
||||
|
||||
// If the `encoder` only contains the type of reply message and no
|
||||
// message, there is no need to send the message. When `encoder` only
|
||||
// contains the type of reply, its length is 1.
|
||||
if (encoding.length(encoder) > 1) {
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
break
|
||||
case messageAwareness: {
|
||||
awarenessProtocol.applyAwarenessUpdate(doc.awareness, decoding.readVarUint8Array(decoder), conn)
|
||||
break
|
||||
}
|
||||
// If this is a text or a message (no Yjs logic) - echo the message back to the client
|
||||
default: {
|
||||
conn.send(String(message))
|
||||
console.log(String(message))
|
||||
break
|
||||
}
|
||||
}
|
||||
} catch (err) {
|
||||
console.error(err)
|
||||
// @ts-ignore
|
||||
doc.emit('error', [err])
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} conn
|
||||
*/
|
||||
const closeConn = (doc, conn) => {
|
||||
if (doc.conns.has(conn)) {
|
||||
/**
|
||||
* @type {Set<number>}
|
||||
*/
|
||||
// @ts-ignore
|
||||
const controlledIds = doc.conns.get(conn)
|
||||
doc.conns.delete(conn)
|
||||
awarenessProtocol.removeAwarenessStates(doc.awareness, Array.from(controlledIds), null)
|
||||
if (doc.conns.size === 0 && persistence !== null) {
|
||||
// if persisted, we store state and destroy ydocument
|
||||
persistence.writeState(doc.name, doc).then(() => {
|
||||
doc.destroy()
|
||||
})
|
||||
docs.delete(doc.name)
|
||||
}
|
||||
}
|
||||
conn.close()
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {Uint8Array} m
|
||||
*/
|
||||
const send = (doc, conn, m) => {
|
||||
if (conn.readyState !== wsReadyStateConnecting && conn.readyState !== wsReadyStateOpen) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
try {
|
||||
conn.send(m, {}, err => { err != null && closeConn(doc, conn) })
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
}
|
||||
|
||||
const pingTimeout = 30000
|
||||
|
||||
/**
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {import('http').IncomingMessage} req
|
||||
* @param {any} opts
|
||||
*/
|
||||
export const setupWSConnection = (conn, req, { docName = (req.url || '').slice(1).split('?')[0], gc = true } = {}) => {
|
||||
conn.binaryType = 'arraybuffer'
|
||||
// get doc, initialize if it does not exist yet
|
||||
const doc = getYDoc(docName, gc)
|
||||
doc.conns.set(conn, new Set())
|
||||
// listen and reply to events
|
||||
conn.on('message', /** @param {ArrayBuffer} message */ message => messageListener(conn, doc, message))
|
||||
|
||||
// Check if connection is still alive
|
||||
let pongReceived = true
|
||||
const pingInterval = setInterval(() => {
|
||||
if (!pongReceived) {
|
||||
if (doc.conns.has(conn)) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
clearInterval(pingInterval)
|
||||
} else if (doc.conns.has(conn)) {
|
||||
pongReceived = false
|
||||
try {
|
||||
conn.ping()
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
}
|
||||
}
|
||||
}, pingTimeout)
|
||||
conn.on('close', () => {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
})
|
||||
conn.on('pong', () => {
|
||||
pongReceived = true
|
||||
})
|
||||
// put the following in a variables in a block so the interval handlers don't keep in in
|
||||
// scope
|
||||
{
|
||||
// send sync step 1
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeSyncStep1(encoder, doc)
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
const awarenessStates = doc.awareness.getStates()
|
||||
if (awarenessStates.size > 0) {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(doc.awareness, Array.from(awarenessStates.keys())))
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user