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Dongho Kim
2026-04-07 17:41:25 +02:00
commit 1ed9bdfa55
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31
.gitignore vendored Normal file
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# Node.js
node_modules/
npm-debug.log
yarn-error.log
# Environment Variables (CRITICAL)
.env
.env.*
!.env.example
# Build Outputs
dist/
build/
bin/
server/
# Generated WireGuard configs
*.conf
# OS/Editor Files
.DS_Store
.idea/
.vscode/
*.suo
*.ntvs*
*.njsproj
*.sln
*.sw?
# ProtonVPN local DBs or cache if generated locally
*.db

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# Multi-stage build for Go + Node.js Backend
# Stage 1: Build Go binary
FROM golang:1.24-alpine AS builder
# Use latest stable go that works (docker tag might not have 1.25.6 yet, alpine is fine)
# Since the go.mod says 1.25.6, we'll let it use the toolchain if 1.24 is the base, or we just rely on standard go compilation.
RUN apk add --no-cache git make gcc musl-dev
WORKDIR /src
COPY protonvpn-wg-confgen/ ./
ENV GOTOOLCHAIN=auto
RUN go build -o /bin/protonvpn-wg-confgen cmd/protonvpn-wg/main.go
# Stage 2: Node.js Backend Production setup
FROM node:22-alpine
WORKDIR /app
# Install CA certs needed for Proton API calls
RUN apk add --no-cache ca-certificates tzdata
# Copy the compiled Go binary from Stage 1
COPY --from=builder /bin/protonvpn-wg-confgen /usr/local/bin/protonvpn-wg-confgen
# Setup the Node JS backend
COPY backend/package.json ./
RUN npm install
COPY backend/ ./
CMD ["npm", "run", "dev"]

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backend/package.json Normal file
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{
"name": "protonvpn-webui-backend",
"version": "1.0.0",
"type": "module",
"scripts": {
"start": "node server.js",
"dev": "node --watch server.js"
},
"dependencies": {
"express": "^4.19.2",
"cors": "^2.8.5",
"helmet": "^7.1.0"
}
}

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backend/server.js Normal file
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import express from 'express';
import cors from 'cors';
import { spawn } from 'child_process';
import crypto from 'crypto';
import path from 'path';
import fs from 'fs/promises';
import { fileURLToPath } from 'url';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const app = express();
const port = process.env.PORT || 3000;
app.use(cors());
app.use(express.json());
// In-memory process store for SSE and interactive stdin
const activeTasks = new Map();
// Helper to construct command arguments
function buildArgs(body, outputFile) {
const args = [];
const username = body.username || process.env.PROTON_USERNAME;
const password = body.password || process.env.PROTON_PASSWORD;
if (username) {
args.push('-username', username);
}
if (password) {
args.push('-password', password);
}
if (body.countries) {
args.push('-countries', body.countries); // e.g., "US,NL"
}
args.push('-output', outputFile);
if (body.p2pOnly) args.push('-p2p-only');
if (body.secureCore) args.push('-secure-core');
if (body.freeOnly) args.push('-free-only');
if (body.ipv6) args.push('-ipv6');
if (body.accelerator === false) args.push('-accelerator=false');
if (body.duration) args.push('-duration', body.duration);
// We use clear-session to force fresh auth if needed, or default behavior
// For web UI, maybe we want to always force clear session so it doesn't use old cached sessions
// that belong to root from inside docker? Let's give user option, typical web user wants it fresh.
args.push('-clear-session');
return args;
}
app.post('/api/generate', async (req, res) => {
const taskId = crypto.randomUUID();
const outputFile = path.join(__dirname, `protonvpn-${taskId}.conf`);
const args = buildArgs(req.body, outputFile);
// Default to system PATH if compiled, handle local testing fallback
let binPath = 'protonvpn-wg-confgen';
console.log(`Starting task ${taskId}: ${binPath} ${args.join(' ')}`);
// Create process
const child = spawn(binPath, args);
// Store task
activeTasks.set(taskId, {
child,
outputFile,
clients: []
});
child.stdout.on('data', (data) => {
const text = data.toString();
console.log(`[${taskId} stdout]`, text);
broadcastToClients(taskId, 'log', { text });
// Check for interactive prompts from Go tool
if (text.includes('2FA Code:')) {
broadcastToClients(taskId, 'require_2fa', {});
}
});
child.stderr.on('data', (data) => {
const text = data.toString();
console.log(`[${taskId} stderr]`, text);
broadcastToClients(taskId, 'log', { text, error: true });
});
child.on('close', async (code) => {
console.log(`[${taskId} exited with code ${code}]`);
let fileContent = null;
let success = code === 0;
if (success) {
try {
fileContent = await fs.readFile(outputFile, 'utf8');
// Clean up the file
await fs.unlink(outputFile).catch(() => {});
} catch (err) {
console.error('Failed to read configuration file', err);
success = false;
}
}
broadcastToClients(taskId, 'complete', { success, code, fileContent });
// Cleanup task memory shortly after complete
setTimeout(() => {
const task = activeTasks.get(taskId);
if (task) {
task.clients.forEach(c => c.end());
activeTasks.delete(taskId);
}
}, 5000);
});
child.on('error', (err) => {
console.error(`[${taskId} ERROR]`, err);
broadcastToClients(taskId, 'log', { text: `Failed to start process: ${err.message}`, error: true });
broadcastToClients(taskId, 'complete', { success: false, code: -1 });
});
res.json({ taskId });
});
// SSE endpoint
app.get('/api/stream/:taskId', (req, res) => {
const { taskId } = req.params;
const task = activeTasks.get(taskId);
if (!task) {
return res.status(404).send('Task not found');
}
res.setHeader('Content-Type', 'text/event-stream');
res.setHeader('Cache-Control', 'no-cache');
res.setHeader('Connection', 'keep-alive');
res.flushHeaders();
task.clients.push(res);
req.on('close', () => {
task.clients = task.clients.filter(client => client !== res);
});
});
app.post('/api/2fa', (req, res) => {
const { taskId, code } = req.body;
const task = activeTasks.get(taskId);
if (!task) {
return res.status(404).json({ error: 'Task not found' });
}
if (!task.child.stdin.writable) {
return res.status(400).json({ error: 'Process not accepting input' });
}
// Write the code followed by newline to the process stdin
task.child.stdin.write(`${code}\n`);
res.json({ success: true });
});
const POPULAR_COUNTRIES = [
{ code: 'US', name: 'United States' },
{ code: 'NL', name: 'Netherlands' },
{ code: 'CH', name: 'Switzerland' },
{ code: 'JP', name: 'Japan' },
{ code: 'UK', name: 'United Kingdom' },
{ code: 'DE', name: 'Germany' },
{ code: 'CA', name: 'Canada' },
{ code: 'FR', name: 'France' },
{ code: 'SE', name: 'Sweden' },
{ code: 'IS', name: 'Iceland' }
];
app.get('/api/countries', (req, res) => {
res.json(POPULAR_COUNTRIES);
});
// Helper for SSE
function broadcastToClients(taskId, eventName, data) {
const task = activeTasks.get(taskId);
if (!task) return;
const payload = `event: ${eventName}\ndata: ${JSON.stringify(data)}\n\n`;
task.clients.forEach(client => client.write(payload));
}
app.listen(port, () => {
console.log(`Backend server running on http://localhost:${port}`);
});

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services:
backend:
build:
context: .
dockerfile: backend/backend.Dockerfile
ports:
- "3000:3000"
volumes:
- ./backend:/app
- /app/node_modules
environment:
- PORT=3000
env_file:
- .env
frontend:
build:
context: ./frontend
dockerfile: dev.Dockerfile
ports:
- "5173:5173"
volumes:
- ./frontend:/app
- /app/node_modules
depends_on:
- backend

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FROM node:22-alpine
WORKDIR /app
COPY package.json ./
RUN npm install
CMD ["npm", "run", "dev", "--", "--host"]

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" type="image/svg+xml" href="/vite.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>ProtonVPN Config Generator</title>
</head>
<body class="bg-zinc-950 text-white min-h-screen font-sans antialiased selection:bg-purple-500/30">
<div id="root"></div>
<script type="module" src="/src/main.tsx"></script>
</body>
</html>

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{
"name": "protonvpn-webui-frontend",
"private": true,
"version": "0.0.0",
"type": "module",
"scripts": {
"dev": "vite",
"build": "vite build",
"lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
"preview": "vite preview"
},
"dependencies": {
"react": "^18.3.1",
"react-dom": "^18.3.1",
"tailwindcss": "^3.4.4",
"postcss": "^8.4.38",
"autoprefixer": "^10.4.19"
},
"devDependencies": {
"@types/react": "^18.3.3",
"@types/react-dom": "^18.3.0",
"@vitejs/plugin-react": "^4.3.1",
"typescript": "^5.2.2",
"vite": "^5.3.4"
}
}

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export default {
plugins: {
tailwindcss: {},
autoprefixer: {},
},
}

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import React, { useState, useEffect, useRef } from 'react';
const COUNTRIES = [
{ code: 'AR', name: 'Argentina' },
{ code: 'AU', name: 'Australia' },
{ code: 'AT', name: 'Austria' },
{ code: 'BE', name: 'Belgium' },
{ code: 'BR', name: 'Brazil' },
{ code: 'BG', name: 'Bulgaria' },
{ code: 'CA', name: 'Canada' },
{ code: 'CL', name: 'Chile' },
{ code: 'CO', name: 'Colombia' },
{ code: 'CR', name: 'Costa Rica' },
{ code: 'HR', name: 'Croatia' },
{ code: 'CY', name: 'Cyprus' },
{ code: 'CZ', name: 'Czechia' },
{ code: 'DK', name: 'Denmark' },
{ code: 'EE', name: 'Estonia' },
{ code: 'FI', name: 'Finland' },
{ code: 'FR', name: 'France' },
{ code: 'GE', name: 'Georgia' },
{ code: 'DE', name: 'Germany' },
{ code: 'GR', name: 'Greece' },
{ code: 'HK', name: 'Hong Kong' },
{ code: 'HU', name: 'Hungary' },
{ code: 'IS', name: 'Iceland' },
{ code: 'IN', name: 'India' },
{ code: 'IE', name: 'Ireland' },
{ code: 'IL', name: 'Israel' },
{ code: 'IT', name: 'Italy' },
{ code: 'JP', name: 'Japan' },
{ code: 'LV', name: 'Latvia' },
{ code: 'LT', name: 'Lithuania' },
{ code: 'LU', name: 'Luxembourg' },
{ code: 'MY', name: 'Malaysia' },
{ code: 'MX', name: 'Mexico' },
{ code: 'MD', name: 'Moldova' },
{ code: 'NL', name: 'Netherlands' },
{ code: 'NZ', name: 'New Zealand' },
{ code: 'NO', name: 'Norway' },
{ code: 'PE', name: 'Peru' },
{ code: 'PH', name: 'Philippines' },
{ code: 'PL', name: 'Poland' },
{ code: 'PT', name: 'Portugal' },
{ code: 'RO', name: 'Romania' },
{ code: 'RS', name: 'Serbia' },
{ code: 'SG', name: 'Singapore' },
{ code: 'SK', name: 'Slovakia' },
{ code: 'SI', name: 'Slovenia' },
{ code: 'ZA', name: 'South Africa' },
{ code: 'KR', name: 'South Korea' },
{ code: 'ES', name: 'Spain' },
{ code: 'SE', name: 'Sweden' },
{ code: 'CH', name: 'Switzerland' },
{ code: 'TW', name: 'Taiwan' },
{ code: 'TR', name: 'Turkey' },
{ code: 'UA', name: 'Ukraine' },
{ code: 'AE', name: 'United Arab Emirates' },
{ code: 'UK', name: 'United Kingdom' },
{ code: 'US', name: 'United States' },
{ code: 'VN', name: 'Vietnam' }
];
const getFlagImg = (countryCode: string) => {
return (
<img
src={`https://flagcdn.com/w40/${countryCode.toLowerCase()}.png`}
width="24"
alt={countryCode}
className="inline-block rounded-[2px] shadow-[0_0_2px_rgba(0,0,0,0.5)]"
/>
);
};
export default function App() {
const [selectedCountries, setSelectedCountries] = useState<string[]>([]);
const [isCountryOpen, setIsCountryOpen] = useState(false);
const [options, setOptions] = useState({
p2pOnly: true,
secureCore: false,
freeOnly: false,
ipv6: false,
accelerator: true,
duration: '365d'
});
const [taskId, setTaskId] = useState<string | null>(null);
const [isGenerating, setIsGenerating] = useState(false);
const [logs, setLogs] = useState<{text: string, error?: boolean}[]>([]);
const [require2FA, setRequire2FA] = useState(false);
const [twoFACode, setTwoFACode] = useState('');
const [downloadData, setDownloadData] = useState<string | null>(null);
const logsEndRef = useRef<HTMLDivElement>(null);
useEffect(() => {
logsEndRef.current?.scrollIntoView({ behavior: 'smooth' });
}, [logs]);
const toggleCountry = (code: string) => {
setSelectedCountries(prev =>
prev.includes(code) ? prev.filter(c => c !== code) : [...prev, code]
);
};
const handleGenerate = async (e: React.FormEvent) => {
e.preventDefault();
if (selectedCountries.length === 0) {
alert("Please select at least one country");
return;
}
setIsGenerating(true);
setLogs([]);
setRequire2FA(false);
setDownloadData(null);
setTaskId(null);
try {
const res = await fetch('/api/generate', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
countries: selectedCountries.join(','),
...options
})
});
const { taskId } = await res.json();
setTaskId(taskId);
const es = new EventSource(`/api/stream/${taskId}`);
es.addEventListener('log', (e) => {
const data = JSON.parse(e.data);
setLogs(prev => [...prev, data]);
});
es.addEventListener('require_2fa', () => {
setRequire2FA(true);
});
es.addEventListener('complete', (e) => {
const data = JSON.parse(e.data);
setLogs(prev => [...prev, { text: `Process completed with code ${data.code}` }]);
setIsGenerating(false);
if (data.success && data.fileContent) {
setDownloadData(data.fileContent);
}
es.close();
});
es.onerror = () => {
setLogs(prev => [...prev, { text: 'Lost connection to stream', error: true }]);
setIsGenerating(false);
es.close();
};
} catch (err) {
setLogs([{ text: `Failed to initiate generation: ${err}`, error: true }]);
setIsGenerating(false);
}
};
const submit2FA = async (e: React.FormEvent) => {
e.preventDefault();
if (!taskId || !twoFACode) return;
setRequire2FA(false);
setLogs(prev => [...prev, { text: `> Submitting 2FA Code: ***`, error: false }]);
await fetch('/api/2fa', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ taskId, code: twoFACode })
});
setTwoFACode('');
};
const downloadFile = () => {
if (!downloadData) return;
const blob = new Blob([downloadData], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `protonvpn-${selectedCountries.join('_')}.conf`;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
};
return (
<div className="min-h-screen bg-[#121015] flex flex-col items-center p-6 relative">
{/* Background aesthetic */}
<div className="absolute top-[-20%] left-[-10%] w-[50%] h-[50%] bg-[#6d4aff]/10 blur-[120px] rounded-full pointer-events-none" />
<div className="absolute top-[30%] right-[-10%] w-[40%] h-[60%] bg-[#2bbd7e]/5 blur-[120px] rounded-full pointer-events-none" />
<div className="max-w-6xl w-full flex flex-col gap-8 z-10">
<header className="flex flex-col md:flex-row items-center justify-between gap-4">
<div>
<h1 className="text-3xl font-extrabold text-transparent bg-clip-text bg-gradient-to-r from-[#6d4aff] to-[#937bff] uppercase tracking-wider">
Proton WireGuard
</h1>
<p className="text-zinc-400 mt-1 font-medium">Headless Configuration Generator</p>
</div>
<p className="text-xs text-zinc-500 bg-white/5 py-2 px-4 rounded-full border border-white/10 backdrop-blur-sm">
Powered by open-source protonvpn-wg-confgen
</p>
</header>
<div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
{/* Controls Panel */}
<div className="bg-[#1c1924]/80 p-8 rounded-3xl border border-white/5 shadow-2xl backdrop-blur-md flex flex-col gap-6">
<h2 className="text-xl font-bold border-b border-white/5 pb-4">Connection Settings</h2>
<form id="gen-form" onSubmit={handleGenerate} className="flex flex-col gap-6">
<div>
<label className="block text-xs font-semibold text-zinc-400 mb-3 uppercase tracking-wide">Target Countries</label>
<div className="flex flex-col gap-2">
<button
type="button"
onClick={() => setIsCountryOpen(!isCountryOpen)}
className="w-full bg-black/40 border border-white/10 rounded-xl px-4 py-3 text-left focus:outline-none focus:border-[#6d4aff] transition-colors flex justify-between items-center text-zinc-300 shadow-sm"
>
<span className="flex items-center gap-2 flex-wrap">
{selectedCountries.length === 0
? 'Toggle countries list...'
: selectedCountries.map(c => (
<span key={c} className="flex items-center gap-1.5 bg-white/10 px-2 py-0.5 rounded-md text-xs font-bold text-white shadow-sm">
{getFlagImg(c)} {c}
</span>
))}
</span>
<svg className={`w-5 h-5 shrink-0 transition-transform ${isCountryOpen ? 'rotate-180' : ''}`} fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
</svg>
</button>
{isCountryOpen && (
<div className="w-full bg-black/20 border border-white/5 rounded-xl max-h-72 overflow-y-auto overflow-x-hidden p-2 backdrop-blur-sm">
<div className="grid grid-cols-1 sm:grid-cols-2 gap-2">
{COUNTRIES.map(country => (
<label
key={country.code}
className={`flex items-center gap-3 px-3 py-2 rounded-lg cursor-pointer transition-colors border max-w-full ${
selectedCountries.includes(country.code)
? 'bg-[#6d4aff]/20 border-[#6d4aff]/50 text-white'
: 'border-transparent hover:bg-white/5 text-zinc-300'
}`}
>
<input
type="checkbox"
className="hidden"
checked={selectedCountries.includes(country.code)}
onChange={() => toggleCountry(country.code)}
/>
<div className={`w-4 h-4 rounded border flex items-center justify-center shrink-0 transition-colors ${
selectedCountries.includes(country.code) ? 'bg-[#6d4aff] border-[#6d4aff]' : 'border-white/20 bg-black/40'
}`}>
{selectedCountries.includes(country.code) && (
<svg className="w-3 h-3 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={3} d="M5 13l4 4L19 7" />
</svg>
)}
</div>
<span className="shrink-0 flex items-center justify-center w-[24px]">
{getFlagImg(country.code)}
</span>
<span className="text-sm font-medium truncate shrink min-w-0" title={country.name}>{country.name}</span>
</label>
))}
</div>
</div>
)}
</div>
</div>
<div>
<label className="block text-xs font-semibold text-zinc-400 mb-3 uppercase tracking-wide">Advanced Options</label>
<div className="grid grid-cols-2 gap-3">
{[
{ key: 'p2pOnly', label: 'P2P Optimized' },
{ key: 'secureCore', label: 'Secure Core' },
{ key: 'freeOnly', label: 'Free Tier Only' },
{ key: 'ipv6', label: 'Enable IPv6' },
{ key: 'accelerator', label: 'VPN Accelerator' }
].map(opt => (
<label key={opt.key} className="flex items-center gap-3 cursor-pointer group">
<div className={`w-5 h-5 rounded border flex items-center justify-center transition-colors ${
options[opt.key as keyof typeof options] ? 'bg-[#6d4aff] border-[#6d4aff]' : 'border-white/20 bg-black/40 group-hover:border-white/40'
}`}>
{options[opt.key as keyof typeof options] && (
<svg className="w-3 h-3 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={3} d="M5 13l4 4L19 7" />
</svg>
)}
</div>
<span className="text-sm text-zinc-300">{opt.label}</span>
<input
type="checkbox"
className="hidden"
checked={options[opt.key as keyof typeof options] as boolean}
onChange={e => setOptions({...options, [opt.key]: e.target.checked})}
/>
</label>
))}
</div>
</div>
<div className="pt-4 border-t border-white/5">
<button
type="submit"
disabled={isGenerating}
className="w-full bg-gradient-to-r from-[#6d4aff] to-[#937bff] hover:opacity-90 text-white font-bold py-4 rounded-xl shadow-lg transition-transform active:scale-[0.98] disabled:opacity-50 disabled:cursor-not-allowed"
>
{isGenerating ? 'Generating...' : 'Generate Configuration'}
</button>
</div>
</form>
</div>
{/* Terminal / Output Panel */}
<div className="bg-black/80 p-6 rounded-3xl border border-white/10 shadow-2xl backdrop-blur-xl flex flex-col h-[600px]">
<div className="flex items-center gap-2 mb-4 px-2">
<div className="w-3 h-3 rounded-full bg-red-500/80"></div>
<div className="w-3 h-3 rounded-full bg-yellow-500/80"></div>
<div className="w-3 h-3 rounded-full bg-green-500/80"></div>
<span className="ml-2 text-xs font-mono text-zinc-500">generator.log</span>
</div>
<div className="flex-1 overflow-y-auto terminal-scroll font-mono text-xs md:text-sm bg-[#050505] rounded-xl p-4 border border-white/5">
{logs.length === 0 && !isGenerating && (
<p className="text-zinc-600 italic">Waiting for execution...</p>
)}
{logs.map((log, i) => (
<div key={i} className={`mb-1 ${log.error ? 'text-red-400' : 'text-zinc-300'}`}>
{log.text.split('\n').map((line, j) => (
<div key={j} className="break-all whitespace-pre-wrap">{line}</div>
))}
</div>
))}
<div ref={logsEndRef} />
</div>
{/* Success Download */}
{downloadData && (
<div className="mt-4 animate-in fade-in slide-in-from-bottom-4">
<button
onClick={downloadFile}
className="w-full bg-[#2bbd7e] border border-[#2bbd7e] text-[#2bbd7e] bg-opacity-20 font-bold py-3 rounded-xl hover:bg-opacity-30 transition-colors flex items-center justify-center gap-2"
>
<svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
</svg>
Download WireGuard Config
</button>
</div>
)}
</div>
</div>
</div>
{/* 2FA Modal */}
{require2FA && (
<div className="fixed inset-0 bg-black/80 backdrop-blur-md z-50 flex items-center justify-center p-4 animate-in fade-in">
<div className="bg-[#1c1924] border border-[#6d4aff]/30 p-8 rounded-3xl max-w-sm w-full shadow-2xl">
<h3 className="text-2xl font-bold mb-2 flex items-center gap-2">
<svg className="w-6 h-6 text-[#6d4aff]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
</svg>
Two-Factor Auth
</h3>
<p className="text-zinc-400 text-sm mb-6">Your Proton account requires a TOTP code to authenticate the VPN API.</p>
<form onSubmit={submit2FA}>
<input
type="text"
autoFocus
maxLength={6}
value={twoFACode}
onChange={e => setTwoFACode(e.target.value.replace(/\D/g, ''))}
placeholder="000 000"
className="w-full bg-black/60 border border-white/10 rounded-xl px-4 py-4 text-center text-2xl tracking-widest font-mono focus:outline-none focus:border-[#6d4aff] transition-colors mb-6"
/>
<button
type="submit"
disabled={twoFACode.length !== 6}
className="w-full bg-white text-black font-bold py-3 rounded-xl disabled:opacity-50 transition-opacity"
>
Verify & Continue
</button>
</form>
</div>
</div>
)}
</div>
);
}

31
frontend/src/index.css Normal file
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@tailwind base;
@tailwind components;
@tailwind utilities;
:root {
--color-proton-purple: #6d4aff;
--color-proton-dark: #121015;
--color-proton-card: #1c1924;
--color-proton-accent: #937bff;
--color-proton-green: #2bbd7e;
--font-sans: "Inter", system-ui, sans-serif;
}
body {
background-color: var(--color-proton-dark);
}
/* Custom scrollbar for terminal */
.terminal-scroll::-webkit-scrollbar {
width: 8px;
}
.terminal-scroll::-webkit-scrollbar-track {
background: rgba(0,0,0,0.2);
}
.terminal-scroll::-webkit-scrollbar-thumb {
background: rgba(109, 74, 255, 0.4);
border-radius: 4px;
}
.terminal-scroll::-webkit-scrollbar-thumb:hover {
background: rgba(109, 74, 255, 0.6);
}

10
frontend/src/main.tsx Normal file
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import React from 'react'
import ReactDOM from 'react-dom/client'
import App from './App.tsx'
import './index.css'
ReactDOM.createRoot(document.getElementById('root')!).render(
<React.StrictMode>
<App />
</React.StrictMode>,
)

11
frontend/tailwind.config.js Normal file
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/** @type {import('tailwindcss').Config} */
export default {
content: [
"./index.html",
"./src/**/*.{js,ts,jsx,tsx}",
],
theme: {
extend: {},
},
plugins: [],
}

21
frontend/tsconfig.json Normal file
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@@ -0,0 +1,21 @@
{
"compilerOptions": {
"target": "ES2020",
"useDefineForClassFields": true,
"lib": ["ES2020", "DOM", "DOM.Iterable"],
"module": "ESNext",
"skipLibCheck": true,
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"resolveJsonModule": true,
"isolatedModules": true,
"noEmit": true,
"jsx": "react-jsx",
"strict": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noFallthroughCasesInSwitch": true
},
"include": ["src"],
"references": [{ "path": "./tsconfig.node.json" }]
}

11
frontend/tsconfig.node.json Normal file
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@@ -0,0 +1,11 @@
{
"compilerOptions": {
"composite": true,
"skipLibCheck": true,
"module": "ESNext",
"moduleResolution": "bundler",
"allowSyntheticDefaultImports": true,
"strict": true
},
"include": ["vite.config.ts"]
}

18
frontend/vite.config.ts Normal file
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@@ -0,0 +1,18 @@
import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
export default defineConfig({
plugins: [
react(),
],
server: {
host: '0.0.0.0', // needed for docker
port: 5173,
proxy: {
'/api': {
target: 'http://backend:3000',
changeOrigin: true
}
}
}
})

124
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name: CI
on:
push:
branches: [main]
pull_request:
branches: [main]
env:
GO_VERSION: "1.25.6"
GOLANGCI_LINT_VERSION: "v2.8.0"
jobs:
lint:
name: Lint
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
- name: Set up Go
uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
with:
go-version: ${{ env.GO_VERSION }}
cache: true
- name: Run go fmt
run: |
if [ -n "$(gofmt -s -l . | grep -v '^vendor/')" ]; then
echo "Go code is not formatted:"
gofmt -s -d . | grep -v '^vendor/'
exit 1
fi
- name: Run go vet
run: go vet ./...
- name: Run golangci-lint
uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9.2.0
with:
version: ${{ env.GOLANGCI_LINT_VERSION }}
test:
name: Test
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
- name: Set up Go
uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
with:
go-version: ${{ env.GO_VERSION }}
cache: true
- name: Run tests
run: go test -v -race ./...
build:
name: Build (${{ matrix.os }})
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
matrix:
os: [ubuntu-latest, macos-latest, windows-latest]
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
- name: Set up Go
uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
with:
go-version: ${{ env.GO_VERSION }}
cache: true
- name: Build (native)
run: go build -o build/protonvpn-wg-confgen${{ matrix.os == 'windows-latest' && '.exe' || '' }} cmd/protonvpn-wg/main.go
cross-compile:
name: Cross-compile
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
include:
# Linux
- goos: linux
goarch: amd64
- goos: linux
goarch: arm64
- goos: linux
goarch: arm
# macOS
- goos: darwin
goarch: amd64
- goos: darwin
goarch: arm64
# Windows
- goos: windows
goarch: amd64
ext: .exe
- goos: windows
goarch: arm64
ext: .exe
steps:
- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
- name: Set up Go
uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
with:
go-version: ${{ env.GO_VERSION }}
cache: true
- name: Build ${{ matrix.goos }}/${{ matrix.goarch }}
env:
GOOS: ${{ matrix.goos }}
GOARCH: ${{ matrix.goarch }}
CGO_ENABLED: "0"
run: |
mkdir -p build
go build -o build/protonvpn-wg-confgen-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.ext }} cmd/protonvpn-wg/main.go
- name: Upload artifact
uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
with:
name: protonvpn-wg-confgen-${{ matrix.goos }}-${{ matrix.goarch }}
path: build/protonvpn-wg-confgen-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.ext }}

37
protonvpn-wg-confgen/.github/workflows/release.yml vendored Normal file
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name: Release
on:
push:
tags:
- "v*"
permissions:
contents: write
env:
GO_VERSION: "1.25.6"
jobs:
release:
name: Release
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
with:
fetch-depth: 0
- name: Set up Go
uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
with:
go-version: ${{ env.GO_VERSION }}
cache: true
- name: Run GoReleaser
uses: goreleaser/goreleaser-action@e435ccd777264be153ace6237001ef4d979d3a7a # v6.4.0
with:
distribution: goreleaser
version: "~> v2"
args: release --clean
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

52
protonvpn-wg-confgen/.gitignore vendored Normal file
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# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool
*.out
# Go vendor directory
vendor/
# Build directory
build/
# Binary
protonvpn-wg-confgen
# IDE specific files
.vscode/
.idea/
*.swp
*.swo
*~
# OS specific files
.DS_Store
Thumbs.db
# Configuration files generated by the tool
*.conf
# Session files
.protonvpn-session.json
# Temporary files
*.tmp
*.bak
# Log files
*.log
# Debug and reference libraries
.debug-libs/
# Claude Code
.claude/
CLAUDE.md

107
protonvpn-wg-confgen/.golangci.yml Normal file
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# yaml-language-server: $schema=https://golangci-lint.run/jsonschema/golangci.v2.jsonschema.json
version: "2"
linters:
enable:
# Default linters
- errcheck
- govet
- ineffassign
- staticcheck
- unused
# Code quality
- gocritic
- gocognit
- gocyclo
- revive
- misspell
- unconvert
- dupl
- prealloc
# Error handling
- nilerr
- errorlint
# Security
- gosec
# Style & formatting
- whitespace
- wastedassign
# Best practices
- exhaustive
- nolintlint
- goconst
- nakedret
- nestif
- bodyclose
- usestdlibvars
- copyloopvar
- intrange
settings:
revive:
severity: warning
rules:
- name: blank-imports
- name: context-as-argument
- name: error-return
- name: error-strings
- name: error-naming
- name: exported
- name: package-comments
- name: range
- name: receiver-naming
- name: indent-error-flow
- name: superfluous-else
gocyclo:
min-complexity: 15
gocognit:
min-complexity: 30
gocritic:
enabled-tags:
- diagnostic
- experimental
- opinionated
- performance
- style
dupl:
threshold: 100
goconst:
min-len: 3
min-occurrences: 3
nakedret:
max-func-lines: 30
nestif:
min-complexity: 4
errorlint:
errorf: true
asserts: true
comparison: true
nolintlint:
require-explanation: true
require-specific: true
exclusions:
paths:
- vendor
issues:
max-issues-per-linter: 50
max-same-issues: 10
run:
timeout: 5m
tests: true
formatters:
enable:
- gofmt
- goimports

76
protonvpn-wg-confgen/.goreleaser.yaml Normal file
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# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
version: 2
project_name: protonvpn-wg-confgen
before:
hooks:
- go mod tidy
builds:
- id: protonvpn-wg-confgen
main: ./cmd/protonvpn-wg
binary: protonvpn-wg-confgen
env:
- CGO_ENABLED=0
goos:
- linux
- darwin
- windows
goarch:
- amd64
- arm64
- arm
goarm:
- "7"
ignore:
# Windows ARM (32-bit) not commonly used
- goos: windows
goarch: arm
# macOS ARM (32-bit) doesn't exist
- goos: darwin
goarch: arm
ldflags:
- -s -w
archives:
- id: default
formats:
- tar.gz
format_overrides:
- goos: windows
formats:
- zip
name_template: >-
{{ .ProjectName }}_
{{- .Version }}_
{{- .Os }}_
{{- .Arch }}
{{- if .Arm }}v{{ .Arm }}{{ end }}
files:
- README.md
- LICENSE
checksum:
name_template: "checksums.txt"
algorithm: sha256
changelog:
sort: asc
filters:
exclude:
- "^docs:"
- "^test:"
- "^ci:"
- "^chore:"
- Merge pull request
- Merge branch
release:
github:
owner: '{{ envOrDefault "GITHUB_REPOSITORY_OWNER" "" }}'
name: protonvpn-wg-confgen
draft: false
prerelease: auto
mode: replace
name_template: "v{{.Version}}"

149
protonvpn-wg-confgen/API_REFERENCE.md Normal file
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# API Reference Implementation
This project's API integration was developed by reverse-engineering ProtonVPN's authentication and VPN APIs. The implementation is based on patterns from these official Proton libraries:
## Authentication (SRP Protocol)
- **[ProtonMail/proton-python-client](https://github.com/ProtonMail/proton-python-client)** - Python implementation of Proton's SRP authentication
- Reference for: `/auth/info`, `/auth`, `/auth/2fa`, `/auth/refresh` endpoints
- SRP protocol implementation patterns
- **[ProtonMail/go-srp](https://github.com/ProtonMail/go-srp)** - Go SRP library (direct dependency)
## VPN API
- **[ProtonVPN/python-proton-vpn-api-core](https://github.com/ProtonVPN/python-proton-vpn-api-core)** - Official Python VPN API client
- Reference for: `/vpn/v1/certificate`, `/vpn/v1/logicals`, `/vpn/v1/sessions` endpoints
- Server filtering and selection patterns
- Certificate request format (`Duration`, `Features`)
## Key Generation
- **[ProtonVPN/go-vpn-lib](https://github.com/ProtonVPN/go-vpn-lib)** - Ed25519 to X25519 key conversion (direct dependency)
## Client Version
- **[ProtonVPN/proton-vpn-gtk-app](https://github.com/ProtonVPN/proton-vpn-gtk-app)** - Official Linux client
- Source for `x-pm-appversion` header value (fetched dynamically at build time)
## API Endpoints Used
| Endpoint | Method | Description |
|----------|--------|-------------|
| `/core/v4/auth/info` | POST | Get SRP authentication parameters |
| `/core/v4/auth` | POST | Authenticate with SRP proofs |
| `/core/v4/auth/2fa` | POST | Submit 2FA code for session upgrade |
| `/auth/refresh` | POST | Refresh session tokens |
| `/vpn/v1/certificate` | POST | Generate WireGuard certificate |
| `/vpn/v1/logicals` | GET | List available VPN servers |
## Certificate Request Format
The certificate request to `/vpn/v1/certificate` uses the following format:
```json
{
"ClientPublicKey": "<PEM-encoded public key>",
"ClientPublicKeyMode": "EC",
"Mode": "persistent",
"DeviceName": "<device name>",
"Duration": "<duration in minutes> min",
"Features": {
"NetShieldLevel": 0,
"RandomNAT": false,
"PortForwarding": false,
"SplitTCP": true
}
}
```
### Feature Keys
| Key | Type | Description |
|-----|------|-------------|
| `NetShieldLevel` | int | NetShield ad/malware blocking (0=off, 1=malware, 2=ads+malware) |
| `RandomNAT` | bool | Moderate NAT / Random NAT for gaming |
| `PortForwarding` | bool | Port forwarding support |
| `SplitTCP` | bool | VPN Accelerator (performance optimization) |
## API Response Codes
**Official sources:**
- [ProtonMail/protoncore_android - ResponseCodes.kt](https://github.com/ProtonMail/protoncore_android/blob/main/network/domain/src/main/kotlin/me/proton/core/network/domain/ResponseCodes.kt) - Kotlin constants (authoritative)
- [ProtonMail/proton-python-client - README.md](https://github.com/ProtonMail/proton-python-client#error-handling) - Python client error handling
- [ProtonMail/proton-python-client - api.py](https://github.com/ProtonMail/proton-python-client/blob/master/proton/api.py) - Python API implementation
### Success Codes
| Code | Constant | Meaning |
|------|----------|---------|
| 1000 | OK | Success |
| 1001 | - | Success (multi-status) |
### Authentication Errors
| Code | Constant | Meaning |
|------|----------|---------|
| 8002 | PASSWORD_WRONG | Incorrect password |
| 8100 | AUTH_SWITCH_TO_SSO | Switch to SSO authentication |
| 8101 | AUTH_SWITCH_TO_SRP | Switch to SRP authentication |
| 9001 | HUMAN_VERIFICATION_REQUIRED | CAPTCHA/human verification required |
| 9002 | DEVICE_VERIFICATION_REQUIRED | Device verification required |
| 9101 | SCOPE_REAUTH_LOCKED | Scope re-authentication locked |
| 9102 | SCOPE_REAUTH_PASSWORD | Scope re-authentication requires password |
### Account Errors
| Code | Constant | Meaning |
|------|----------|---------|
| 10001 | ACCOUNT_FAILED_GENERIC | Generic account failure |
| 10002 | ACCOUNT_DELETED | Account has been deleted |
| 10003 | ACCOUNT_DISABLED | Account has been disabled |
### Version Errors
| Code | Constant | Meaning |
|------|----------|---------|
| 5003 | APP_VERSION_BAD | App version no longer supported |
| 5005 | API_VERSION_INVALID | API version invalid |
| 5099 | APP_VERSION_NOT_SUPPORTED_FOR_EXTERNAL_ACCOUNTS | App version not supported for external accounts |
### Other Errors
| Code | Constant | Meaning |
|------|----------|---------|
| 6001 | BODY_PARSE_FAILURE | Request body parse failure |
| 12081 | USER_CREATE_NAME_INVALID | Invalid username during creation |
| 12087 | USER_CREATE_TOKEN_INVALID | Invalid token during user creation |
### VPN-Specific Codes (observed, not in official docs)
| Code | Meaning | Notes |
|------|---------|-------|
| 9100 | 2FA required for VPN | VPN certificate endpoint requires 2FA-authenticated session |
| 10013 | Mailbox password required | Legacy 2-password mode (proton-python-client says "RefreshToken invalid") |
**Note:** Codes 9100 and 10013 were observed during VPN operations but are not documented in the official protoncore_android library. Their meanings may vary by context.
## Required Headers
All authenticated requests require these headers:
```
Authorization: Bearer <access_token>
x-pm-uid: <session_uid>
x-pm-appversion: linux-vpn@X.Y.Z
User-Agent: ProtonVPN/X.Y.Z (Linux; Ubuntu)
Content-Type: application/json
```
**Important**: Using a web client version (like `web-vpn-settings@X.Y.Z`) may trigger CAPTCHA challenges. Always use the Linux client version format.
## Token Refresh
The token refresh endpoint expects:
```json
{
"ResponseType": "token",
"GrantType": "refresh_token",
"RefreshToken": "<refresh_token>",
"RedirectURI": "http://protonmail.ch"
}
```
## Local Reference Libraries
For debugging and verification, reference implementations are cloned in `.debug-libs/`:
- `proton-python-client` - SRP authentication reference
- `python-proton-vpn-api-core` - VPN API reference
- `proton-vpn-gtk-app` - Linux client reference

674
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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable. Therefore, we
have designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
License. Each licensee is addressed as "you". "Licensees" and
"recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy. The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified Program or a work based
on the Program.
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.
To "convey" a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.
An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

89
protonvpn-wg-confgen/Makefile Normal file
View File

@@ -0,0 +1,89 @@
.PHONY: build build-all clean test fmt vet lint install vendor run dev show-version
BINARY_NAME=protonvpn-wg-confgen
BUILD_DIR=build
CMD_DIR=cmd/protonvpn-wg
MODULE=protonvpn-wg-confgen
# Fetch latest ProtonVPN Linux client version from GitHub (with fallback)
PROTON_VERSION_URL=https://raw.githubusercontent.com/ProtonVPN/proton-vpn-gtk-app/stable/versions.yml
PROTON_VERSION ?= $(shell curl -sf "$(PROTON_VERSION_URL)" 2>/dev/null | head -1 | cut -d' ' -f2 || echo "4.13.1")
# ldflags to inject version at build time
LDFLAGS=-ldflags "-X '$(MODULE)/internal/constants.AppVersion=linux-vpn@$(PROTON_VERSION)' \
-X '$(MODULE)/internal/constants.UserAgent=ProtonVPN/$(PROTON_VERSION) (Linux; Ubuntu)'"
# Build the binary
build:
@echo "Building $(BINARY_NAME) with ProtonVPN client version $(PROTON_VERSION)..."
@mkdir -p $(BUILD_DIR)
@go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME) $(CMD_DIR)/main.go
# Build for multiple platforms
build-all:
@echo "Building for multiple platforms with ProtonVPN client version $(PROTON_VERSION)..."
@mkdir -p $(BUILD_DIR)
@echo " Linux amd64..."
@GOOS=linux GOARCH=amd64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-linux-amd64 $(CMD_DIR)/main.go
@echo " Linux arm64..."
@GOOS=linux GOARCH=arm64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-linux-arm64 $(CMD_DIR)/main.go
@echo " Linux arm..."
@GOOS=linux GOARCH=arm go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-linux-arm $(CMD_DIR)/main.go
@echo " macOS amd64..."
@GOOS=darwin GOARCH=amd64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-amd64 $(CMD_DIR)/main.go
@echo " macOS arm64..."
@GOOS=darwin GOARCH=arm64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-darwin-arm64 $(CMD_DIR)/main.go
@echo " Windows amd64..."
@GOOS=windows GOARCH=amd64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-windows-amd64.exe $(CMD_DIR)/main.go
@echo " Windows arm64..."
@GOOS=windows GOARCH=arm64 go build $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-windows-arm64.exe $(CMD_DIR)/main.go
@echo "Done!"
# Clean build artifacts
clean:
@echo "Cleaning..."
@rm -rf $(BUILD_DIR)
@rm -f $(BINARY_NAME)
# Run tests
test:
@echo "Running tests..."
@go test -v ./...
# Format code
fmt:
@echo "Formatting code..."
@go fmt ./...
# Run go vet
vet:
@echo "Running go vet..."
@go vet ./...
# Run golangci-lint (requires golangci-lint to be installed)
lint:
@echo "Running linter..."
@golangci-lint run
# Install the binary
install: build
@echo "Installing $(BINARY_NAME)..."
@cp $(BUILD_DIR)/$(BINARY_NAME) $(GOPATH)/bin/$(BINARY_NAME)
# Update vendor directory
vendor:
@echo "Updating vendor..."
@go mod vendor
# Run the application
run: build
@./$(BUILD_DIR)/$(BINARY_NAME) $(ARGS)
# Development build with race detector
dev:
@echo "Building with race detector and ProtonVPN client version $(PROTON_VERSION)..."
@go build -race $(LDFLAGS) -o $(BUILD_DIR)/$(BINARY_NAME)-dev $(CMD_DIR)/main.go
# Show current ProtonVPN version that would be used
show-version:
@echo "ProtonVPN client version: $(PROTON_VERSION)"

326
protonvpn-wg-confgen/README.md Normal file
View File

@@ -0,0 +1,326 @@
# ProtonVPN WireGuard Config Generate
[![CI](https://github.com/hatemosphere/protonvpn-wg-confgen/actions/workflows/ci.yml/badge.svg)](https://github.com/hatemosphere/protonvpn-wg-confgen/actions/workflows/ci.yml)
[![Release](https://img.shields.io/github/v/release/hatemosphere/protonvpn-wg-confgen?include_prereleases)](https://github.com/hatemosphere/protonvpn-wg-confgen/releases/latest)
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A Go program that generates WireGuard configuration files for ProtonVPN servers with automatic selection of the best servers from specified countries with support of generic filters.
## Motivation
I wanted to automatically rotate VPN servers on my private HTPC Linux host running WireGuard, and since I'm already paying for a Proton bundle subscription, why not just use theirs? Unfortunately, as of the time of writing, they didn't have a good programmatic headless way to generate WireGuard profiles, so I did my research and reverse-engineered their APIs (which was a pain in the butt) and created this. The idea is to run this code as a daemon and restart the WireGuard client on profile file change.
## Features
- Authenticates with ProtonVPN using username/password
- Opnionally persists and refreshes login session, to function in headless mode after entering password once
- Supports 2FA authentication (TOTP only, no FIDO2/security keys)
- Creates persistent WireGuard configurations (visible in ProtonVPN dashboard)
- Automatically selects the best server (highest score, lowest load) from specified countries
- Supports both Free tier and paid tier servers (Plus and ProtonMail)
- Filters servers by features (P2P support, Secure Core)
- Generates WireGuard configuration files
- Supports VPN accelerator feature
- IPv6 support
## Installation
1. Clone the repository:
```bash
git clone https://github.com/hatemosphere/protonvpn-wg-confgen
cd protonvpn-wg-confgen
```
2. Build the program:
```bash
make build
```
Or manually with Go:
```bash
go build -o build/protonvpn-wg-confgen cmd/protonvpn-wg/main.go
```
## Usage
```bash
./build/protonvpn-wg-confgen -username <username> -countries <country-codes> [options]
```
### Options
- `-username`: ProtonVPN username (optional, will prompt if not provided)
- `-countries`: Comma-separated list of country codes (e.g., US,NL,CH) **[Required]**
- `-output`: Output WireGuard configuration file (default: protonvpn.conf)
- `-ipv6`: Enable IPv6 support (default: false)
- `-dns`: Comma-separated list of DNS servers (defaults based on IPv6 setting)
- `-allowed-ips`: Comma-separated list of allowed IPs (defaults based on IPv6 setting)
- `-accelerator`: Enable VPN accelerator (default: true)
- `-api-url`: ProtonVPN API URL (default: https://vpn-api.proton.me)
- `-p2p-only`: Use only P2P-enabled servers (default: true)
- `-secure-core`: Use only Secure Core servers for multi-hop VPN (default: false)
- `-free-only`: Use only Free tier servers (tier 0) (default: false)
- `-device-name`: Device name for WireGuard config (auto-generated if empty)
- `-debug`: Enable debug output showing all filtered servers (default: false)
- `-duration`: Certificate duration (default: 365d). Examples: 30m, 24h, 7d, 1h30m. Maximum: 365d
- `-clear-session`: Clear saved session and force re-authentication
- `-no-session`: Don't save or use session persistence
- `-force-refresh`: Force session refresh even if not close to expiration (requires re-authentication)
- `-session-duration`: Session cache duration (default: 0 = use API expiration). Examples: 12h, 24h, 7d. Max: 30d
### Examples
1. Generate config for best P2P server in US or Netherlands:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US,NL
```
2. Generate config with custom DNS and output file:
```bash
./build/protonvpn-wg-confgen -username myusername -countries CH,DE -dns 1.1.1.1,8.8.8.8 -output switzerland.conf
```
3. Disable VPN accelerator:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -accelerator=false
```
4. Generate config with 30-day duration:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -duration 30d
```
5. Generate config without saving session (always prompt for password):
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -no-session
```
6. Use session with 24-hour expiration:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -session-duration 24h
```
7. Enable IPv6 support:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -ipv6
```
8. Use Secure Core servers for enhanced privacy:
```bash
./build/protonvpn-wg-confgen -username myusername -countries NL,US -secure-core
```
9. Debug mode to see all available servers:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US -debug
```
10. Use Free tier servers only:
```bash
./build/protonvpn-wg-confgen -username myusername -countries US,NL -free-only
```
## IPv6 Support
By default, the tool generates IPv4-only configurations. When you enable IPv6 with the `-ipv6` flag:
- **Interface Address**: Both IPv4 (10.2.0.2/32) and IPv6 (2a07:b944::2:2/128) addresses are assigned
- **DNS Servers**: IPv4 DNS (10.2.0.1) and IPv6 DNS (2a07:b944::2:1) - both ProtonVPN's internal DNS servers
- **Allowed IPs**: Both IPv4 (0.0.0.0/0) and IPv6 (::/0) routes are included
You can override the defaults by explicitly specifying `-dns` and `-allowed-ips` flags.
## Secure Core
Secure Core is ProtonVPN's premium feature that routes your traffic through multiple servers before leaving the VPN network:
- First hop: Through secure servers in privacy-friendly countries (Switzerland, Iceland, Sweden)
- Second hop: To your chosen destination country
- Provides additional protection against network-based attacks
- Use the `-secure-core` flag to enable this feature
- Note: Secure Core servers may have higher latency due to the multi-hop routing
**Important Notes:**
- Secure Core servers don't support P2P, so P2P filtering is automatically disabled when using `-secure-core`
- The country filter always applies to **exit countries** - where your traffic appears to come from
- Server names show both entry and exit countries (e.g., "IS-NL#1" = Iceland → Netherlands)
- Entry countries for Secure Core are always privacy-friendly: Switzerland (CH), Iceland (IS), Sweden (SE)
## Authentication
**Important:** This tool only works with Proton accounts configured in [Single Password Mode](https://proton.me/support/single-password). This is the default for all new Proton accounts. If your account uses the legacy 2-password mode (separate login and mailbox passwords), you'll need to switch to single password mode first.
The program supports the following authentication methods:
1. **Username/Password**: Enter your ProtonVPN credentials
2. **2FA (TOTP only)**: If enabled, you'll be prompted for your 6-digit authenticator code
**Important 2FA Limitation:** This tool only supports **TOTP-based 2FA** (authenticator apps like Google Authenticator, Authy, 1Password, etc.). **FIDO2/WebAuthn security keys are NOT supported** because they require browser/platform APIs for the challenge-response protocol.
If you use a security key as your only 2FA method, you have two options:
- Add TOTP as an additional 2FA method in your [Proton account security settings](https://account.proton.me/u/0/vpn/account-password)
- Use a security key that also supports TOTP (like YubiKey with Yubico Authenticator)
### Session Persistence
The program saves your authentication session to avoid re-entering credentials:
- Sessions are stored in `~/.protonvpn-session.json` with secure permissions (0600)
- ProtonVPN sessions expire after 30 days (from API `ExpiresIn` field)
- Session duration is configurable with `-session-duration` (default: 0 = use API's 30 days)
- Custom durations are capped at the API's expiration time
- Sessions show time until expiration when reused
- Sessions are automatically verified before use
- Sessions automatically refresh when less than 7 days remain
- Use `-clear-session` flag to force re-authentication
- Use `-force-refresh` flag to force refresh even if not expiring soon
- Use `-no-session` flag to disable session persistence entirely
- Sessions are user-specific and won't be used for different usernames
## Using the Generated Configuration
Once you have the WireGuard configuration file, you can use it with any WireGuard client:
### Linux
```bash
sudo wg-quick up ./protonvpn.conf
```
### macOS (with WireGuard installed)
```bash
sudo wg-quick up ./protonvpn.conf
```
### Windows/GUI clients
Import the configuration file into your WireGuard client.
## Server Tier Support
By default, the tool excludes Free tier servers and only uses paid tier servers (Plus and ProtonMail):
- **Free tier (tier 0)**: Available with `-free-only` flag. Limited server selection, no P2P support
- **Plus tier (tier 2)**: Default. Full feature support including P2P and Secure Core
- **ProtonMail tier (tier 3)**: Default. Included with Proton bundle subscriptions
**Important Notes:**
- When using `-free-only`, P2P filtering is automatically disabled since Free servers don't support P2P
- Free tier servers have limited availability and may have higher load
- Secure Core requires Plus or higher subscription
## Requirements
- Go 1.25 or higher
- ProtonVPN account (Free tier or paid subscription)
## Security Notes
- The program generates a new WireGuard private key for each run
- Configuration files contain sensitive information and are saved with 0600 permissions
- Never share your WireGuard configuration files
- Persistent configurations appear in your ProtonVPN dashboard and can be revoked there
- Certificates are valid for the specified duration (default: 365 days, max: 365 days)
## Project Structure
```
.
├── cmd/
│ └── protonvpn-wg/ # Main application entry point
│ └── main.go # CLI entry point
├── internal/ # Private application code
│ ├── api/ # API types and data structures
│ │ └── types.go # ProtonVPN API response types
│ ├── auth/ # Authentication logic
│ │ ├── auth.go # SRP authentication implementation
│ │ ├── errors.go # Custom error types
│ │ └── session.go # Session management and refresh
│ ├── config/ # Configuration handling
│ │ ├── flags.go # Command-line flag parsing
│ │ └── types.go # Config struct and validation
│ ├── constants/ # Application constants
│ │ ├── api.go # API endpoints and headers
│ │ ├── defaults.go # Default configuration values
│ │ ├── session.go # Session-related constants
│ │ └── wireguard.go # WireGuard network constants
│ └── vpn/ # VPN functionality
│ ├── client.go # Certificate generation
│ └── servers.go # Server selection logic
├── pkg/ # Public packages
│ ├── timeutil/ # Time and duration utilities
│ │ ├── formatter.go # Duration formatting
│ │ └── parser.go # Duration parsing
│ ├── validation/ # Input validation
│ │ └── validation.go # Username and country code validation
│ └── wireguard/ # WireGuard configuration
│ ├── config.go # Config file generation
│ └── config_test.go # Config generation tests
├── vendor/ # Vendored dependencies
├── Makefile # Build automation
├── go.mod # Go module definition
├── go.sum # Module checksums
└── README.md # This file
```
## Development
```bash
# Format code
make fmt
# Run tests
make test
# Run linter (requires golangci-lint)
make lint
# Build for multiple platforms
make build-all
# Clean build artifacts
make clean
```
## Troubleshooting
### CAPTCHA Verification Required (Error 9001)
If you encounter "CAPTCHA verification required" error:
1. **Login via ProtonVPN website first**: This can help establish your account as legitimate
2. **Try from a different IP**: VPN or residential IPs may work better than datacenter IPs
3. **Wait and retry**: Sometimes waiting a few hours helps
4. **Use saved sessions**: Once authenticated, sessions are saved to avoid repeated CAPTCHA challenges
### App Version Errors (Error 5003)
If you see "This version of the app is no longer supported":
- The app version is automatically fetched from ProtonVPN's GitHub at build time
- Rebuild with `make build` to get the latest version
- Override manually if needed: `make build PROTON_VERSION=X.Y.Z`
- Check current version: `make show-version`
### Two-Password Mode Error (Code 10013)
If you see "unexpected mailbox password request - account might still be in 2-password mode":
- Your Proton account is using the legacy 2-password mode (separate login and mailbox passwords)
- This tool only supports [Single Password Mode](https://proton.me/support/single-password)
- To switch: Go to Proton account settings → Security → Password mode → Switch to single password
- Note: Single password mode is the default for all new Proton accounts since ~2020
### 2FA Required for VPN (Error 9100)
If authentication succeeds but you get error 9100 when getting the VPN certificate:
- Your account has 2FA enabled, but ProtonVPN's device trust mechanism allowed login without 2FA
- The VPN certificate endpoint requires a session that was authenticated with 2FA
- **Solution**: Run with `-clear-session` flag to force re-authentication, which should prompt for 2FA
- If 2FA prompt still doesn't appear, try from a different IP/network to bypass device trust
- This can also occur if your account uses 2-password mode (see error 10013 above)
## API Reference
For detailed API documentation including endpoints, request formats, response codes, and reference implementations, see [API_REFERENCE.md](API_REFERENCE.md).
## License
This project is licensed under the [GNU General Public License v3.0](LICENSE).
This is required because the project uses [ProtonVPN/go-vpn-lib](https://github.com/ProtonVPN/go-vpn-lib) which is licensed under GPL-3.0.

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protonvpn-wg-confgen/cmd/protonvpn-wg/main.go Normal file
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// Package main provides the command-line interface for generating ProtonVPN WireGuard configurations.
package main
import (
"fmt"
"os"
"strings"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/auth"
"protonvpn-wg-confgen/internal/config"
"protonvpn-wg-confgen/internal/vpn"
"protonvpn-wg-confgen/pkg/wireguard"
"github.com/ProtonVPN/go-vpn-lib/ed25519"
)
func main() {
if err := run(); err != nil {
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
os.Exit(1)
}
}
func run() error {
// Parse configuration
cfg, err := config.Parse()
if err != nil {
config.PrintUsage()
return err
}
// Authenticate
authClient := auth.NewClient(cfg)
session, err := authClient.Authenticate()
if err != nil {
return fmt.Errorf("authentication failed: %w", err)
}
fmt.Println("Authentication successful!")
// Generate key pair
keyPair, err := ed25519.NewKeyPair()
if err != nil {
return fmt.Errorf("failed to generate key pair: %w", err)
}
cfg.ClientPrivateKey = keyPair.ToX25519Base64()
// Create VPN client
vpnClient := vpn.NewClient(cfg, session)
// Get VPN certificate
vpnInfo, err := vpnClient.GetCertificate(keyPair)
if err != nil {
return fmt.Errorf("failed to get VPN certificate: %w", err)
}
// Get server list
servers, err := vpnClient.GetServers()
if err != nil {
return fmt.Errorf("failed to get servers: %w", err)
}
// Select best server
selector := vpn.NewServerSelector(cfg)
server, err := selector.SelectBest(servers)
if err != nil {
return err
}
// Build feature list string
features := api.GetFeatureNames(server.Features)
featureStr := ""
if len(features) > 0 {
featureStr = fmt.Sprintf(", Features: %s", strings.Join(features, ", "))
}
fmt.Printf("Selected server: %s (Country: %s, City: %s, Tier: %s, Load: %d%%, Score: %.2f, Servers: %d%s)\n",
server.Name, server.ExitCountry, server.City, api.GetTierName(server.Tier),
server.Load, server.Score, len(server.Servers), featureStr)
// Get best physical server
physicalServer := vpn.GetBestPhysicalServer(server)
if physicalServer == nil {
return fmt.Errorf("no physical servers available")
}
// Generate WireGuard configuration
generator := wireguard.NewConfigGenerator(cfg)
if err := generator.Generate(server, physicalServer, cfg.ClientPrivateKey); err != nil {
return fmt.Errorf("failed to generate WireGuard config: %w", err)
}
fmt.Printf("WireGuard configuration written to: %s\n", cfg.OutputFile)
// Note about persistence
if vpnInfo.DeviceName != "" {
fmt.Printf("Device name: %s (visible in ProtonVPN dashboard)\n", vpnInfo.DeviceName)
}
// Show final success
fmt.Printf("\nSuccessfully generated config for %s\n", server.ExitCountry)
return nil
}

19
protonvpn-wg-confgen/go.mod Normal file
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module protonvpn-wg-confgen
go 1.25.6
require (
github.com/ProtonMail/go-srp v0.0.7
github.com/ProtonVPN/go-vpn-lib v0.0.0-20260122061324-3e8ad1be9349
golang.org/x/term v0.39.0
)
require (
github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf // indirect
github.com/ProtonMail/go-crypto v1.3.0 // indirect
github.com/cloudflare/circl v1.6.2 // indirect
github.com/cronokirby/saferith v0.33.0 // indirect
github.com/pkg/errors v0.9.1 // indirect
golang.org/x/crypto v0.47.0 // indirect
golang.org/x/sys v0.40.0 // indirect
)

68
protonvpn-wg-confgen/go.sum Normal file
View File

@@ -0,0 +1,68 @@
github.com/ProtonMail/bcrypt v0.0.0-20210511135022-227b4adcab57/go.mod h1:HecWFHognK8GfRDGnFQbW/LiV7A3MX3gZVs45vk5h8I=
github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf h1:yc9daCCYUefEs69zUkSzubzjBbL+cmOXgnmt9Fyd9ug=
github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf/go.mod h1:o0ESU9p83twszAU8LBeJKFAAMX14tISa0yk4Oo5TOqo=
github.com/ProtonMail/go-crypto v0.0.0-20230321155629-9a39f2531310/go.mod h1:8TI4H3IbrackdNgv+92dI+rhpCaLqM0IfpgCgenFvRE=
github.com/ProtonMail/go-crypto v1.3.0 h1:ILq8+Sf5If5DCpHQp4PbZdS1J7HDFRXz/+xKBiRGFrw=
github.com/ProtonMail/go-crypto v1.3.0/go.mod h1:9whxjD8Rbs29b4XWbB8irEcE8KHMqaR2e7GWU1R+/PE=
github.com/ProtonMail/go-srp v0.0.7 h1:Sos3Qk+th4tQR64vsxGIxYpN3rdnG9Wf9K4ZloC1JrI=
github.com/ProtonMail/go-srp v0.0.7/go.mod h1:giCp+7qRnMIcCvI6V6U3S1lDDXDQYx2ewJ6F/9wdlJk=
github.com/ProtonVPN/go-vpn-lib v0.0.0-20260122061324-3e8ad1be9349 h1:1BgRubBCnxoG9cA4vn3O9n1CPuzMRWC5tK9JcIYuAw4=
github.com/ProtonVPN/go-vpn-lib v0.0.0-20260122061324-3e8ad1be9349/go.mod h1:zNATEdp1+/2tD0ggij9aP55zXqKIkVT2/Wn2YE7FjLc=
github.com/bwesterb/go-ristretto v1.2.0/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
github.com/cloudflare/circl v1.1.0/go.mod h1:prBCrKB9DV4poKZY1l9zBXg2QJY7mvgRvtMxxK7fi4I=
github.com/cloudflare/circl v1.6.2 h1:hL7VBpHHKzrV5WTfHCaBsgx/HGbBYlgrwvNXEVDYYsQ=
github.com/cloudflare/circl v1.6.2/go.mod h1:2eXP6Qfat4O/Yhh8BznvKnJ+uzEoTQ6jVKJRn81BiS4=
github.com/cronokirby/saferith v0.33.0 h1:TgoQlfsD4LIwx71+ChfRcIpjkw+RPOapDEVxa+LhwLo=
github.com/cronokirby/saferith v0.33.0/go.mod h1:QKJhjoqUtBsXCAVEjw38mFqoi7DebT7kthcD7UzbnoA=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
golang.org/x/crypto v0.47.0 h1:V6e3FRj+n4dbpw86FJ8Fv7XVOql7TEwpHapKoMJ/GO8=
golang.org/x/crypto v0.47.0/go.mod h1:ff3Y9VzzKbwSSEzWqJsJVBnWmRwRSHt/6Op5n9bQc4A=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
golang.org/x/term v0.39.0 h1:RclSuaJf32jOqZz74CkPA9qFuVTX7vhLlpfj/IGWlqY=
golang.org/x/term v0.39.0/go.mod h1:yxzUCTP/U+FzoxfdKmLaA0RV1WgE0VY7hXBwKtY/4ww=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/yaml.v3 v3.0.0-20220521103104-8f96da9f5d5e h1:3i3ny04XV6HbZ2N1oIBw1UBYATHAOpo4tfTF83JM3Z0=
gopkg.in/yaml.v3 v3.0.0-20220521103104-8f96da9f5d5e/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

165
protonvpn-wg-confgen/internal/api/types.go Normal file
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// Package api defines the data structures for ProtonVPN API responses.
package api
// AuthInfoResponse represents the response from the auth info endpoint
type AuthInfoResponse struct {
Code int `json:"Code"`
Version int `json:"Version"`
Modulus string `json:"Modulus"`
ServerEphemeral string `json:"ServerEphemeral"`
Salt string `json:"Salt"`
SRPSession string `json:"SRPSession"`
TwoFA struct {
Enabled int `json:"Enabled"`
TOTP int `json:"TOTP"`
} `json:"2FA"`
}
// AuthRequest represents the authentication request payload
type AuthRequest struct {
Username string `json:"Username"`
ClientEphemeral string `json:"ClientEphemeral"`
ClientProof string `json:"ClientProof"`
SRPSession string `json:"SRPSession"`
TwoFactorCode string `json:"TwoFactorCode,omitempty"`
}
// Session represents a ProtonVPN session
type Session struct {
Code int `json:"Code"`
AccessToken string `json:"AccessToken"`
RefreshToken string `json:"RefreshToken"`
TokenType string `json:"TokenType"`
Scopes []string `json:"Scopes"`
UID string `json:"UID"`
UserID string `json:"UserID"`
EventID string `json:"EventID"`
ServerProof string `json:"ServerProof"`
PasswordMode int `json:"PasswordMode"`
ExpiresIn int `json:"ExpiresIn"` // Session expiration in seconds
TwoFA struct {
Enabled int `json:"Enabled"`
TOTP int `json:"TOTP"`
} `json:"2FA"`
}
// VPNInfo represents VPN certificate information
type VPNInfo struct {
Code int `json:"Code"`
Error string `json:"Error,omitempty"`
SerialNumber string `json:"SerialNumber"`
ClientKeyFingerprint string `json:"ClientKeyFingerprint"`
ClientKey string `json:"ClientKey"`
Certificate string `json:"Certificate"`
ExpirationTime int64 `json:"ExpirationTime"`
RefreshTime int64 `json:"RefreshTime"`
Mode string `json:"Mode"`
DeviceName string `json:"DeviceName"`
ServerPublicKeyMode string `json:"ServerPublicKeyMode"`
ServerPublicKey string `json:"ServerPublicKey"`
Features struct {
Bouncing bool `json:"bouncing"`
ModerateNAT bool `json:"moderate-nat"`
NetshieldLevel int `json:"netshield-level"`
PortForwarding bool `json:"port-forwarding"`
VPNAccelerator bool `json:"vpn-accelerator"`
} `json:"Features"`
}
// LogicalServer represents a ProtonVPN logical server
type LogicalServer struct {
ID string `json:"ID"`
Name string `json:"Name"`
EntryCountry string `json:"EntryCountry"`
ExitCountry string `json:"ExitCountry"`
Domain string `json:"Domain"`
Tier int `json:"Tier"`
Features int `json:"Features"`
Region string `json:"Region"`
City string `json:"City"`
Score float64 `json:"Score"`
Load int `json:"Load"`
Status int `json:"Status"`
Servers []PhysicalServer `json:"Servers"`
HostCountry string `json:"HostCountry"`
Location struct {
Lat float64 `json:"Lat"`
Long float64 `json:"Long"`
} `json:"Location"`
}
// PhysicalServer represents a physical VPN server
type PhysicalServer struct {
ID string `json:"ID"`
EntryIP string `json:"EntryIP"`
ExitIP string `json:"ExitIP"`
Domain string `json:"Domain"`
Status int `json:"Status"`
Label string `json:"Label"`
X25519PublicKey string `json:"X25519PublicKey"`
Generation int `json:"Generation"`
ServicesDownReason string `json:"ServicesDownReason"`
}
// LogicalsResponse represents the response from the logicals endpoint
type LogicalsResponse struct {
Code int `json:"Code"`
LogicalServers []LogicalServer `json:"LogicalServers"`
}
// Server feature constants
const (
FeatureSecureCore = 1
FeatureTor = 2
FeatureP2P = 4
FeatureStreaming = 8
FeatureIPv6 = 16
)
// Server tier constants
const (
TierFree = 0
TierPlus = 2
TierPM = 3
)
// Password mode constants
const (
PasswordModeSingle = 1
PasswordModeTwo = 2
)
// GetTierName returns a human-readable name for the server tier
func GetTierName(tier int) string {
switch tier {
case TierFree:
return "Free"
case TierPlus:
return "Plus"
case TierPM:
return "ProtonMail"
default:
return "Unknown"
}
}
// GetFeatureNames returns a list of enabled features for a server
func GetFeatureNames(features int) []string {
var result []string
if features&FeatureSecureCore != 0 {
result = append(result, "SecureCore")
}
if features&FeatureTor != 0 {
result = append(result, "Tor")
}
if features&FeatureP2P != 0 {
result = append(result, "P2P")
}
if features&FeatureStreaming != 0 {
result = append(result, "Streaming")
}
if features&FeatureIPv6 != 0 {
result = append(result, "IPv6")
}
return result
}

503
protonvpn-wg-confgen/internal/auth/auth.go Normal file
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@@ -0,0 +1,503 @@
// Package auth handles ProtonVPN authentication using the SRP protocol.
package auth
import (
"bufio"
"bytes"
"crypto/tls"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"os"
"strings"
"time"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/config"
"protonvpn-wg-confgen/internal/constants"
"protonvpn-wg-confgen/pkg/timeutil"
"github.com/ProtonMail/go-srp"
"golang.org/x/term"
)
// Client handles ProtonVPN authentication
type Client struct {
config *config.Config
httpClient *http.Client
sessionStore *SessionStore
}
// NewClient creates a new authentication client
func NewClient(cfg *config.Config) *Client {
return &Client{
config: cfg,
sessionStore: NewSessionStore(),
httpClient: &http.Client{
Timeout: 30 * time.Second,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: false,
MinVersion: tls.VersionTLS12,
},
},
},
}
}
// handleSessionRefresh attempts to refresh a session and save it if successful
func (c *Client) handleSessionRefresh(savedSession *api.Session, reason string) (*api.Session, error) {
fmt.Println(reason)
refreshedSession, err := RefreshSession(c.httpClient, c.config.APIURL, savedSession)
if err != nil {
fmt.Printf("Token refresh failed: %v\n", err)
fmt.Println("Re-authenticating with password...")
fmt.Println("(Your trusted device status for MFA will be preserved)")
_ = c.sessionStore.Delete()
return nil, err
}
fmt.Println("Session refreshed successfully!")
// Check if refresh token was rotated
if savedSession.RefreshToken != refreshedSession.RefreshToken {
fmt.Println("Refresh token was rotated")
}
// Save the refreshed session
if !c.config.NoSession {
sessionDuration, _ := timeutil.ParseSessionDuration(c.config.SessionDuration)
if err := c.sessionStore.Save(refreshedSession, c.config.Username, sessionDuration); err != nil {
fmt.Printf("Warning: Failed to save refreshed session: %v\n", err)
}
}
return refreshedSession, nil
}
// tryExistingSession attempts to use an existing saved session
func (c *Client) tryExistingSession() (*api.Session, error) {
savedSession, timeUntilExpiry, err := c.sessionStore.Load(c.config.Username)
if err != nil {
fmt.Printf("Warning: Failed to load saved session: %v\n", err)
return nil, err
}
if savedSession == nil {
return nil, nil
}
// Determine what to do with the saved session
switch {
case c.config.ForceRefresh:
reason := fmt.Sprintf("Forcing session refresh (current session expires in %s)", timeutil.HumanizeDuration(timeUntilExpiry))
return c.handleSessionRefresh(savedSession, reason)
case timeUntilExpiry < time.Duration(constants.SessionRefreshDays)*24*time.Hour && timeUntilExpiry > 0:
reason := fmt.Sprintf("Session expires soon (in %s), attempting refresh...", timeutil.HumanizeDuration(timeUntilExpiry))
return c.handleSessionRefresh(savedSession, reason)
case VerifySession(c.httpClient, c.config.APIURL, savedSession):
fmt.Printf("Using saved session (expires in %s)\n", timeutil.HumanizeDuration(timeUntilExpiry))
return savedSession, nil
default:
fmt.Println("Saved session invalid, re-authenticating...")
_ = c.sessionStore.Delete()
return nil, nil
}
}
// Authenticate performs the full authentication flow
func (c *Client) Authenticate() (*api.Session, error) {
if err := c.ensureUsername(); err != nil {
return nil, err
}
// Try existing session unless clearing or disabled
if session := c.handleExistingSession(); session != nil {
return session, nil
}
if err := c.ensurePassword(); err != nil {
return nil, err
}
// Perform fresh authentication
session, err := c.performFreshAuth()
if err != nil {
return nil, err
}
// Handle session scope upgrade if needed
if err := c.upgradeSessionIfNeeded(session); err != nil {
return nil, err
}
c.saveSessionIfEnabled(session)
return session, nil
}
// handleExistingSession handles session clearing or reuse
func (c *Client) handleExistingSession() *api.Session {
if c.config.ClearSession {
fmt.Println("Clearing saved session...")
_ = c.sessionStore.Delete()
return nil
}
if c.config.NoSession {
return nil
}
session, err := c.tryExistingSession()
if err == nil && session != nil {
return session
}
return nil
}
// performFreshAuth performs SRP authentication and returns a new session
func (c *Client) performFreshAuth() (*api.Session, error) {
authInfo, err := c.getAuthInfo()
if err != nil {
return nil, fmt.Errorf("failed to get auth info: %w", err)
}
clientProofs, err := c.generateSRPProofs(authInfo)
if err != nil {
return nil, err
}
authReq := c.buildAuthRequest(authInfo, clientProofs)
// Handle 2FA if needed
if authInfo.TwoFA.Enabled == constants.EnabledTrue && authInfo.TwoFA.TOTP == constants.EnabledTrue {
code, err := c.get2FACode()
if err != nil {
return nil, err
}
authReq["TwoFactorCode"] = code
}
session, err := c.sendAuthRequest(authReq)
if err != nil {
return nil, err
}
// Verify server proof
if session.ServerProof != base64.StdEncoding.EncodeToString(clientProofs.ExpectedServerProof) {
return nil, fmt.Errorf("server proof verification failed")
}
return session, nil
}
// generateSRPProofs generates SRP client proofs for authentication
func (c *Client) generateSRPProofs(authInfo *api.AuthInfoResponse) (*srp.Proofs, error) {
auth, err := srp.NewAuth(
authInfo.Version,
c.config.Username,
[]byte(c.config.Password),
authInfo.Salt,
authInfo.Modulus,
authInfo.ServerEphemeral,
)
if err != nil {
return nil, fmt.Errorf("failed to create SRP auth: %w", err)
}
proofs, err := auth.GenerateProofs(2048)
if err != nil {
return nil, fmt.Errorf("failed to generate SRP proofs: %w", err)
}
return proofs, nil
}
// buildAuthRequest builds the authentication request payload
func (c *Client) buildAuthRequest(authInfo *api.AuthInfoResponse, proofs *srp.Proofs) map[string]interface{} {
return map[string]interface{}{
"Username": c.config.Username,
"ClientEphemeral": base64.StdEncoding.EncodeToString(proofs.ClientEphemeral),
"ClientProof": base64.StdEncoding.EncodeToString(proofs.ClientProof),
"SRPSession": authInfo.SRPSession,
"PersistentCookies": 0,
}
}
// upgradeSessionIfNeeded upgrades session with 2FA if VPN scope is missing
func (c *Client) upgradeSessionIfNeeded(session *api.Session) error {
hasVPNScope, hasTwoFactorScope := c.checkSessionScopes(session)
if hasVPNScope || !hasTwoFactorScope {
return nil
}
fmt.Println("Session lacks VPN scope - 2FA verification required to upgrade session...")
code, err := c.get2FACode()
if err != nil {
return fmt.Errorf("failed to get 2FA code: %w", err)
}
updatedScopes, err := c.submit2FA(session, code)
if err != nil {
return fmt.Errorf("2FA verification failed: %w", err)
}
session.Scopes = updatedScopes
fmt.Println("2FA verified - session upgraded with VPN scope")
return nil
}
// checkSessionScopes checks if session has VPN and twofactor scopes
func (c *Client) checkSessionScopes(session *api.Session) (hasVPN, hasTwoFactor bool) {
for _, scope := range session.Scopes {
switch scope {
case "vpn":
hasVPN = true
case "twofactor":
hasTwoFactor = true
}
}
return
}
// saveSessionIfEnabled saves the session if persistence is enabled
func (c *Client) saveSessionIfEnabled(session *api.Session) {
if c.config.NoSession {
return
}
sessionDuration, err := timeutil.ParseSessionDuration(c.config.SessionDuration)
if err != nil {
fmt.Printf("Warning: Invalid session duration, using default: %v\n", err)
sessionDuration = 0
}
if err := c.sessionStore.Save(session, c.config.Username, sessionDuration); err != nil {
fmt.Printf("Warning: Failed to save session: %v\n", err)
}
}
func (c *Client) ensureUsername() error {
if c.config.Username == "" {
fmt.Print("Username (without @protonmail.com): ")
reader := bufio.NewReader(os.Stdin)
username, err := reader.ReadString('\n')
if err != nil {
return fmt.Errorf("error reading username: %w", err)
}
c.config.Username = strings.TrimSpace(username)
if c.config.Username == "" {
return fmt.Errorf("username cannot be empty")
}
}
return nil
}
func (c *Client) ensurePassword() error {
if c.config.Password == "" {
fmt.Print("Password: ")
passwordBytes, err := term.ReadPassword(int(os.Stdin.Fd()))
fmt.Println()
if err != nil {
return fmt.Errorf("error reading password: %w", err)
}
c.config.Password = string(passwordBytes)
}
return nil
}
func (c *Client) get2FACode() (string, error) {
fmt.Print("2FA Code: ")
reader := bufio.NewReader(os.Stdin)
code, err := reader.ReadString('\n')
if err != nil {
return "", fmt.Errorf("error reading 2FA code: %w", err)
}
code = strings.TrimSpace(code)
// Validate that code is numeric (TOTP codes are 6 digits)
if code == "" {
return "", fmt.Errorf("2FA code cannot be empty")
}
for _, c := range code {
if c < '0' || c > '9' {
return "", fmt.Errorf("2FA code must be numeric (TOTP only).\n" +
"FIDO2/WebAuthn security keys are not supported.\n" +
"Please ensure you have TOTP (authenticator app) configured as your 2FA method")
}
}
return code, nil
}
func (c *Client) getAuthInfo() (*api.AuthInfoResponse, error) {
reqBody := map[string]interface{}{
"Username": c.config.Username,
"Intent": "Proton",
}
body, err := json.Marshal(reqBody)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, c.config.APIURL+"/core/v4/auth/info", bytes.NewBuffer(body))
if err != nil {
return nil, err
}
c.setHeaders(req)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
respBody, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("HTTP error %d: %s", resp.StatusCode, string(respBody))
}
var authInfo api.AuthInfoResponse
if err := json.Unmarshal(respBody, &authInfo); err != nil {
return nil, fmt.Errorf("failed to parse auth info: %w", err)
}
if authInfo.Code != CodeSuccess {
return nil, fmt.Errorf("failed to get auth info, code: %d", authInfo.Code)
}
// Validate required fields
if authInfo.Modulus == "" {
return nil, fmt.Errorf("received empty modulus from auth info")
}
if authInfo.ServerEphemeral == "" {
return nil, fmt.Errorf("received empty server ephemeral from auth info")
}
return &authInfo, nil
}
func (c *Client) sendAuthRequest(authReq map[string]interface{}) (*api.Session, error) {
body, err := json.Marshal(authReq)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, c.config.APIURL+"/core/v4/auth", bytes.NewBuffer(body))
if err != nil {
return nil, err
}
c.setHeaders(req)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
respBody, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("authentication HTTP error %d: %s", resp.StatusCode, string(respBody))
}
var session api.Session
if err := json.Unmarshal(respBody, &session); err != nil {
return nil, err
}
// Handle mailbox password request (2-password mode)
// Code 10013 means the account uses legacy 2-password mode which requires a separate mailbox password
// VPN doesn't need mailbox decryption, but the auth flow requires completing it
if session.Code == CodeMailboxPasswordError {
return nil, fmt.Errorf("your account uses legacy 2-password mode which is not supported.\n" +
"Please switch to single-password mode:\n" +
" 1. Go to account.proton.me\n" +
" 2. Settings → All settings → Account and password → Passwords\n" +
" 3. Switch to 'One-password mode'\n" +
"This is recommended by Proton for most users and is required for this tool")
}
if session.Code != CodeSuccess {
return nil, NewError(session.Code)
}
return &session, nil
}
func (c *Client) setHeaders(req *http.Request) {
req.Header.Set("Content-Type", "application/json")
req.Header.Set("x-pm-appversion", constants.AppVersion)
req.Header.Set("User-Agent", constants.UserAgent)
}
// submit2FA submits a 2FA code to upgrade the session with additional scopes (like VPN)
func (c *Client) submit2FA(session *api.Session, code string) ([]string, error) {
reqBody := map[string]interface{}{
"TwoFactorCode": code,
}
body, err := json.Marshal(reqBody)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, c.config.APIURL+"/core/v4/auth/2fa", bytes.NewBuffer(body))
if err != nil {
return nil, err
}
// Need to include auth headers for 2FA upgrade
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", session.AccessToken))
req.Header.Set("x-pm-uid", session.UID)
req.Header.Set("x-pm-appversion", constants.AppVersion)
req.Header.Set("User-Agent", constants.UserAgent)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
respBody, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("2FA HTTP error %d: %s", resp.StatusCode, string(respBody))
}
// Parse response to get updated scopes
var twoFAResp struct {
Code int `json:"Code"`
Scopes []string `json:"Scopes"`
Error string `json:"Error,omitempty"`
}
if err := json.Unmarshal(respBody, &twoFAResp); err != nil {
return nil, fmt.Errorf("failed to parse 2FA response: %w", err)
}
if twoFAResp.Code != CodeSuccess {
if twoFAResp.Error != "" {
return nil, fmt.Errorf("2FA failed (code %d): %s", twoFAResp.Code, twoFAResp.Error)
}
return nil, NewError(twoFAResp.Code)
}
return twoFAResp.Scopes, nil
}

82
protonvpn-wg-confgen/internal/auth/errors.go Normal file
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@@ -0,0 +1,82 @@
package auth
import (
"errors"
"fmt"
"protonvpn-wg-confgen/internal/constants"
)
// Error codes from ProtonVPN API
// Official source: github.com/ProtonMail/protoncore_android/.../ResponseCodes.kt
// See API_REFERENCE.md for full documentation.
const (
CodeSuccess = constants.APICodeSuccess
CodeWrongPassword = 8002 // PASSWORD_WRONG: Incorrect password
CodeWrongPasswordFormat = 8004 // Password format is incorrect (observed)
CodeCaptchaRequired = 9001 // HUMAN_VERIFICATION_REQUIRED: CAPTCHA needed
Code2FARequiredForVPN = 9100 // VPN-specific: certificate endpoint requires 2FA session (not in official docs)
CodeAccountDeleted = 10002 // ACCOUNT_DELETED: Account has been deleted
CodeAccountDisabled = 10003 // ACCOUNT_DISABLED: Account has been disabled
CodeMailboxPasswordError = 10013 // Legacy 2-password mode / invalid refresh token (context-dependent)
)
// Error represents an authentication error with ProtonVPN-specific error code
type Error struct {
Code int
Message string
}
// Error implements the error interface
func (e Error) Error() string {
return e.Message
}
// NewError creates a new authentication error from an API response code
func NewError(code int) error {
message := getErrorMessage(code)
return Error{
Code: code,
Message: message,
}
}
// getErrorMessage returns a human-readable error message for a given error code
func getErrorMessage(code int) string {
switch code {
case CodeWrongPassword:
return "incorrect username or password"
case CodeWrongPasswordFormat:
return "password format is incorrect"
case CodeCaptchaRequired:
return "CAPTCHA verification required"
case Code2FARequiredForVPN:
return "2FA required for VPN operations - your session was authenticated without 2FA (device trust). Use -clear-session to force re-authentication with 2FA"
case CodeAccountDeleted:
return "account has been deleted"
case CodeAccountDisabled:
return "account has been disabled"
case CodeMailboxPasswordError:
return "account uses legacy 2-password mode - please switch to single-password mode at account.proton.me"
default:
return fmt.Sprintf("authentication failed with code: %d", code)
}
}
// IsAccountError checks if the error is an account status error (deleted or disabled)
func IsAccountError(err error) bool {
var authErr Error
if !errors.As(err, &authErr) {
return false
}
return authErr.Code == CodeAccountDeleted || authErr.Code == CodeAccountDisabled
}
// IsCaptchaError checks if the error requires CAPTCHA verification
func IsCaptchaError(err error) bool {
var authErr Error
if !errors.As(err, &authErr) {
return false
}
return authErr.Code == CodeCaptchaRequired
}

210
protonvpn-wg-confgen/internal/auth/session.go Normal file
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package auth
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"time"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/constants"
)
// SessionStore handles persistent session storage
type SessionStore struct {
filePath string
}
// NewSessionStore creates a new session store
func NewSessionStore() *SessionStore {
homeDir, err := os.UserHomeDir()
if err != nil {
// Fallback to current directory
homeDir = "."
}
return &SessionStore{
filePath: filepath.Join(homeDir, constants.SessionFileName),
}
}
// SavedSession represents a session with metadata
type SavedSession struct {
Session *api.Session `json:"session"`
Username string `json:"username"`
SavedAt time.Time `json:"saved_at"`
ExpiresAt time.Time `json:"expires_at"`
}
// Save stores the session to disk
func (s *SessionStore) Save(session *api.Session, username string, duration time.Duration) error {
savedSession := &SavedSession{
Session: session,
Username: username,
SavedAt: time.Now(),
}
// Calculate expiration based on API response
apiExpiration := time.Now().Add(time.Duration(session.ExpiresIn) * time.Second)
if duration == 0 {
// Use the API's expiration
savedSession.ExpiresAt = apiExpiration
} else {
// Use the user-specified duration, but cap it at API expiration
userExpiration := time.Now().Add(duration)
if userExpiration.After(apiExpiration) {
savedSession.ExpiresAt = apiExpiration
} else {
savedSession.ExpiresAt = userExpiration
}
}
data, err := json.MarshalIndent(savedSession, "", " ")
if err != nil {
return fmt.Errorf("failed to marshal session: %w", err)
}
err = os.WriteFile(s.filePath, data, constants.SessionFileMode)
if err != nil {
return fmt.Errorf("failed to write session file: %w", err)
}
return nil
}
// Load retrieves a saved session from disk
func (s *SessionStore) Load(username string) (*api.Session, time.Duration, error) {
data, err := os.ReadFile(s.filePath)
if err != nil {
if os.IsNotExist(err) {
return nil, 0, nil // No saved session
}
return nil, 0, fmt.Errorf("failed to read session file: %w", err)
}
var savedSession SavedSession
err = json.Unmarshal(data, &savedSession)
if err != nil {
return nil, 0, fmt.Errorf("failed to unmarshal session: %w", err)
}
// Check if session is for the same user
if savedSession.Username != username {
return nil, 0, nil
}
// Check if session has expired
now := time.Now()
if now.After(savedSession.ExpiresAt) {
// Delete expired session
_ = s.Delete()
return nil, 0, nil
}
// Calculate time until expiration
timeUntilExpiry := savedSession.ExpiresAt.Sub(now)
return savedSession.Session, timeUntilExpiry, nil
}
// Delete removes the saved session
func (s *SessionStore) Delete() error {
err := os.Remove(s.filePath)
if err != nil && !os.IsNotExist(err) {
return fmt.Errorf("failed to delete session file: %w", err)
}
return nil
}
// GetPath returns the session file path
func (s *SessionStore) GetPath() string {
return s.filePath
}
// RefreshSession attempts to refresh the session using the refresh token.
// It returns a new session with updated tokens if successful.
func RefreshSession(httpClient *http.Client, apiURL string, oldSession *api.Session) (*api.Session, error) {
// Based on proton-python-client/proton/api.py refresh() method
reqBody := map[string]interface{}{
"ResponseType": "token",
"GrantType": "refresh_token",
"RefreshToken": oldSession.RefreshToken,
"RedirectURI": "http://protonmail.ch",
}
body, err := json.Marshal(reqBody)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, apiURL+"/auth/refresh", bytes.NewBuffer(body))
if err != nil {
return nil, err
}
// Set standard headers
req.Header.Set("Content-Type", "application/json")
req.Header.Set("x-pm-appversion", constants.AppVersion)
req.Header.Set("User-Agent", constants.UserAgent)
// Include auth headers for refresh
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", oldSession.AccessToken))
req.Header.Set("x-pm-uid", oldSession.UID)
resp, err := httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
respBody, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if resp.StatusCode == http.StatusOK {
var session api.Session
if err := json.Unmarshal(respBody, &session); err != nil {
return nil, err
}
if constants.IsSuccessCode(session.Code) {
return &session, nil
}
}
// If refresh fails, return error to trigger re-authentication
return nil, fmt.Errorf("refresh failed (status %d): %s", resp.StatusCode, string(respBody))
}
// VerifySession checks if a session is still valid by making a test API request.
func VerifySession(httpClient *http.Client, apiURL string, session *api.Session) bool {
// Make a simple request to verify the session
req, err := http.NewRequest(http.MethodGet, apiURL+"/vpn/v1/logicals", http.NoBody)
if err != nil {
return false
}
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", session.AccessToken))
req.Header.Set("x-pm-uid", session.UID)
req.Header.Set("x-pm-appversion", constants.AppVersion)
req.Header.Set("User-Agent", constants.UserAgent)
resp, err := httpClient.Do(req)
if err != nil {
return false
}
defer func() { _ = resp.Body.Close() }()
// If we get a 401, the session is invalid
if resp.StatusCode == http.StatusUnauthorized {
return false
}
// Any 2xx response means the session is valid
return resp.StatusCode >= 200 && resp.StatusCode < 300
}

120
protonvpn-wg-confgen/internal/config/flags.go Normal file
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// Package config handles command-line argument parsing and configuration management.
package config
import (
"flag"
"fmt"
"os"
"strings"
"protonvpn-wg-confgen/internal/constants"
"protonvpn-wg-confgen/pkg/validation"
)
// Parse parses command-line flags and returns a Config
func Parse() (*Config, error) {
cfg := &Config{}
var countriesFlag string
var dnsServersFlag string
var allowedIPsFlag string
// Set default DNS and allowed IPs based on IPv6 support
defaultDNS := constants.DefaultDNSIPv4
defaultAllowedIPs := constants.DefaultAllowedIPsIPv4
// Authentication flags
flag.StringVar(&cfg.Username, "username", "", "ProtonVPN username")
flag.StringVar(&cfg.Password, "password", "", "ProtonVPN password (will prompt if not provided)")
// Server selection flags
flag.StringVar(&countriesFlag, "countries", "", "Comma-separated list of country codes (e.g., US,NL,CH)")
flag.BoolVar(&cfg.P2PServersOnly, "p2p-only", constants.DefaultP2POnly, "Use only P2P-enabled servers")
flag.BoolVar(&cfg.SecureCoreOnly, "secure-core", false, "Use only Secure Core servers (multi-hop through privacy-friendly countries)")
flag.BoolVar(&cfg.FreeOnly, "free-only", false, "Use only Free tier servers (tier 0)")
// Output configuration
flag.StringVar(&cfg.OutputFile, "output", "protonvpn.conf", "Output WireGuard configuration file")
flag.StringVar(&cfg.DeviceName, "device-name", "", "Device name for WireGuard config (auto-generated if empty)")
// Network configuration
flag.BoolVar(&cfg.EnableIPv6, "ipv6", false, "Enable IPv6 support")
flag.StringVar(&dnsServersFlag, "dns", "", "Comma-separated list of DNS servers (defaults based on IPv6 setting)")
flag.StringVar(&allowedIPsFlag, "allowed-ips", "", "Comma-separated list of allowed IPs (defaults based on IPv6 setting)")
flag.BoolVar(&cfg.EnableAccelerator, "accelerator", true, "Enable VPN accelerator")
// Certificate configuration
flag.StringVar(&cfg.Duration, "duration", constants.DefaultCertDuration, "Certificate duration (e.g., 30m, 24h, 7d, 1h30m). Max: 365d")
// Session management
flag.BoolVar(&cfg.ClearSession, "clear-session", false, "Clear saved session and force re-authentication")
flag.BoolVar(&cfg.NoSession, "no-session", false, "Don't save or use session persistence")
flag.BoolVar(&cfg.ForceRefresh, "force-refresh", false, "Force session refresh even if not expired")
flag.StringVar(&cfg.SessionDuration, "session-duration", "0", "Session cache duration (e.g., 12h, 24h, 7d). 0 = no expiration")
// Advanced configuration
flag.StringVar(&cfg.APIURL, "api-url", constants.DefaultAPIURL, "ProtonVPN API URL")
flag.BoolVar(&cfg.Debug, "debug", false, "Enable debug output")
flag.Parse()
// Validate required flags
if countriesFlag == "" {
return nil, fmt.Errorf("countries flag is required")
}
// Parse and validate country codes
cfg.Countries = parseCountries(countriesFlag)
for _, country := range cfg.Countries {
if !validation.IsValidCountryCode(country) {
return nil, fmt.Errorf("invalid country code: %s", country)
}
}
// Set defaults based on IPv6 setting
if cfg.EnableIPv6 {
defaultDNS = fmt.Sprintf("%s,%s", constants.DefaultDNSIPv4, constants.DefaultDNSIPv6)
defaultAllowedIPs = fmt.Sprintf("%s,%s", constants.DefaultAllowedIPsIPv4, constants.DefaultAllowedIPsIPv6)
}
// Use defaults if flags are empty
if dnsServersFlag == "" {
dnsServersFlag = defaultDNS
}
if allowedIPsFlag == "" {
allowedIPsFlag = defaultAllowedIPs
}
// Parse lists (with space trimming)
cfg.DNSServers = parseCommaSeparatedList(dnsServersFlag)
cfg.AllowedIPs = parseCommaSeparatedList(allowedIPsFlag)
// Clean up username
cfg.Username = validation.CleanUsername(cfg.Username)
return cfg, nil
}
// parseCommaSeparatedList parses a comma-separated string into a trimmed slice
func parseCommaSeparatedList(input string) []string {
parts := strings.Split(input, ",")
var result []string
for _, part := range parts {
part = strings.TrimSpace(part)
if part != "" {
result = append(result, part)
}
}
return result
}
// parseCountries parses and normalizes country codes
func parseCountries(countriesFlag string) []string {
return parseCommaSeparatedList(strings.ToUpper(countriesFlag))
}
// PrintUsage prints usage information
func PrintUsage() {
fmt.Fprintf(os.Stderr, "Usage: %s -username <username> -countries <country-codes> [options]\n\n", os.Args[0])
flag.PrintDefaults()
}

48
protonvpn-wg-confgen/internal/config/types.go Normal file
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package config
import "fmt"
// Config holds all configuration options
type Config struct {
// Authentication
Username string
Password string
// Server selection
Countries []string
P2PServersOnly bool
SecureCoreOnly bool
FreeOnly bool
// Output configuration
OutputFile string
ClientPrivateKey string
DeviceName string
// Network configuration
DNSServers []string
AllowedIPs []string
EnableAccelerator bool
EnableIPv6 bool
// Certificate configuration
Duration string
// Session management
ClearSession bool
NoSession bool
ForceRefresh bool
SessionDuration string
// Advanced configuration
APIURL string
Debug bool
}
// ValidateCredentials checks if we have the required credentials
func (c *Config) ValidateCredentials() error {
if c.Username == "" {
return fmt.Errorf("username is required")
}
return nil
}

37
protonvpn-wg-confgen/internal/constants/api.go Normal file
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// Package constants defines constants used throughout the application.
package constants
// API endpoints
const (
DefaultAPIURL = "https://vpn-api.proton.me"
AuthInfoPath = "/core/v4/auth/info"
AuthPath = "/core/v4/auth"
RefreshPath = "/auth/refresh"
CertificatePath = "/vpn/v1/certificate"
LogicalsPath = "/vpn/v1/logicals"
)
// API version headers - can be overridden at build time via ldflags:
// go build -ldflags "-X .../internal/constants.AppVersion=linux-vpn@X.Y.Z"
var (
AppVersion = "linux-vpn@4.13.1"
UserAgent = "ProtonVPN/4.13.1 (Linux; Ubuntu)"
)
// API response codes
// Reference: proton-python-client/proton/api.py checks for codes 1000 and 1001
const (
APICodeSuccess = 1000
APICodeMultiStatus = 1001 // Also indicates success in some contexts
)
// IsSuccessCode checks if an API response code indicates success
func IsSuccessCode(code int) bool {
return code == APICodeSuccess || code == APICodeMultiStatus
}
// Server/feature status values
const (
StatusOnline = 1
EnabledTrue = 1
)

14
protonvpn-wg-confgen/internal/constants/defaults.go Normal file
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package constants
// Certificate defaults
const (
DefaultCertDuration = "365d"
MaxCertDuration = 365 // days
CertMode = "persistent"
PublicKeyMode = "EC"
)
// Server selection defaults
const (
DefaultP2POnly = true
)

9
protonvpn-wg-confgen/internal/constants/session.go Normal file
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package constants
// Session defaults
const (
SessionFileName = ".protonvpn-session.json"
SessionFileMode = 0o600 // Read/write for owner only
SessionRefreshDays = 7 // Refresh when less than 7 days remain
SessionExpirySeconds = 2592000 // 30 days in seconds (from API)
)

17
protonvpn-wg-confgen/internal/constants/wireguard.go Normal file
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package constants
// WireGuard defaults
const (
WireGuardPort = 51820
DefaultMTU = 1420
// IPv4 configuration
WireGuardIPv4 = "10.2.0.2/32"
DefaultDNSIPv4 = "10.2.0.1"
DefaultAllowedIPsIPv4 = "0.0.0.0/0"
// IPv6 configuration
WireGuardIPv6 = "2a07:b944::2:2/128"
DefaultDNSIPv6 = "2a07:b944::2:1"
DefaultAllowedIPsIPv6 = "::/0"
)

148
protonvpn-wg-confgen/internal/vpn/client.go Normal file
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// Package vpn manages VPN certificate generation and server interactions.
package vpn
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"time"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/config"
"protonvpn-wg-confgen/internal/constants"
"protonvpn-wg-confgen/pkg/timeutil"
"github.com/ProtonVPN/go-vpn-lib/ed25519"
)
// Client handles VPN operations
type Client struct {
config *config.Config
session *api.Session
httpClient *http.Client
}
// NewClient creates a new VPN client
func NewClient(cfg *config.Config, session *api.Session) *Client {
return &Client{
config: cfg,
session: session,
httpClient: &http.Client{Timeout: 10 * time.Second},
}
}
// GetCertificate generates a VPN certificate
func (c *Client) GetCertificate(keyPair *ed25519.KeyPair) (*api.VPNInfo, error) {
publicKeyPEM, err := keyPair.PublicKeyPKIXPem()
if err != nil {
return nil, fmt.Errorf("failed to get public key PEM: %w", err)
}
// Use provided device name or generate one
deviceName := c.config.DeviceName
if deviceName == "" {
deviceName = fmt.Sprintf("WireGuard-%s-%d", c.config.Username, time.Now().Unix())
}
// Parse duration
durationStr, err := timeutil.ParseToMinutes(c.config.Duration)
if err != nil {
return nil, fmt.Errorf("failed to parse duration: %w", err)
}
// Build certificate request matching official ProtonVPN API format
// Feature keys from: python-proton-vpn-api-core/proton/vpn/session/fetcher.py
certReq := map[string]interface{}{
"ClientPublicKey": publicKeyPEM,
"ClientPublicKeyMode": "EC",
"Mode": "persistent", // Create persistent configuration
"DeviceName": deviceName,
"Duration": durationStr,
"Features": map[string]interface{}{
"NetShieldLevel": 0, // NetShield disabled
"RandomNAT": false, // Moderate NAT disabled
"PortForwarding": false, // Port forwarding disabled
"SplitTCP": c.config.EnableAccelerator, // VPN Accelerator (called SplitTCP in API)
},
}
certJSON, err := json.Marshal(certReq)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, c.config.APIURL+"/vpn/v1/certificate", bytes.NewBuffer(certJSON))
if err != nil {
return nil, err
}
c.setHeaders(req)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var vpnInfo api.VPNInfo
if err := json.Unmarshal(body, &vpnInfo); err != nil {
return nil, err
}
if !constants.IsSuccessCode(vpnInfo.Code) {
// Include the actual API error message if available
if vpnInfo.Error != "" {
return nil, fmt.Errorf("VPN certificate error (code %d): %s", vpnInfo.Code, vpnInfo.Error)
}
return nil, fmt.Errorf("failed to get VPN certificate, code: %d", vpnInfo.Code)
}
return &vpnInfo, nil
}
// GetServers fetches the list of VPN servers
func (c *Client) GetServers() ([]api.LogicalServer, error) {
req, err := http.NewRequest(http.MethodGet, c.config.APIURL+"/vpn/v1/logicals", http.NoBody)
if err != nil {
return nil, err
}
c.setHeaders(req)
resp, err := c.httpClient.Do(req)
if err != nil {
return nil, err
}
defer func() { _ = resp.Body.Close() }()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var response api.LogicalsResponse
if err := json.Unmarshal(body, &response); err != nil {
return nil, err
}
if !constants.IsSuccessCode(response.Code) {
return nil, fmt.Errorf("API returned error code: %d", response.Code)
}
return response.LogicalServers, nil
}
func (c *Client) setHeaders(req *http.Request) {
req.Header.Set("Content-Type", "application/json")
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", c.session.AccessToken))
req.Header.Set("x-pm-uid", c.session.UID)
req.Header.Set("x-pm-appversion", constants.AppVersion)
req.Header.Set("User-Agent", constants.UserAgent)
}

165
protonvpn-wg-confgen/internal/vpn/servers.go Normal file
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package vpn
import (
"errors"
"fmt"
"sort"
"strings"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/config"
"protonvpn-wg-confgen/internal/constants"
)
// ServerSelector handles server selection logic
type ServerSelector struct {
config *config.Config
}
// NewServerSelector creates a new server selector
func NewServerSelector(cfg *config.Config) *ServerSelector {
return &ServerSelector{config: cfg}
}
// SelectBest selects the best server based on configuration
func (s *ServerSelector) SelectBest(servers []api.LogicalServer) (*api.LogicalServer, error) {
filtered := s.filterServers(servers)
if s.config.Debug {
s.printDebugServerList(filtered)
}
if len(filtered) == 0 {
return nil, s.buildNoServersError()
}
// Sort servers: first by score (descending), then by load (ascending)
sort.Slice(filtered, func(i, j int) bool {
// If scores are different, higher score wins
if filtered[i].Score != filtered[j].Score {
return filtered[i].Score > filtered[j].Score
}
// If scores are equal, lower load wins
return filtered[i].Load < filtered[j].Load
})
return &filtered[0], nil
}
func (s *ServerSelector) filterServers(servers []api.LogicalServer) []api.LogicalServer {
var filtered []api.LogicalServer
for i := range servers {
if s.isServerEligible(&servers[i]) {
filtered = append(filtered, servers[i])
}
}
return filtered
}
func (s *ServerSelector) isServerEligible(server *api.LogicalServer) bool {
// Skip offline servers
if server.Status != constants.StatusOnline {
return false
}
// Filter by tier based on -free-only flag
if s.config.FreeOnly {
// When free-only is enabled, only accept Free tier servers
if server.Tier != api.TierFree {
return false
}
} else {
// Otherwise, filter out free tier servers
if server.Tier == api.TierFree {
return false
}
}
// Filter by P2P support if requested (but not when using Secure Core or Free tier)
if s.config.P2PServersOnly && !s.config.SecureCoreOnly && !s.config.FreeOnly && server.Features&api.FeatureP2P == 0 {
return false
}
// Filter by Secure Core if requested
if s.config.SecureCoreOnly && server.Features&api.FeatureSecureCore == 0 {
return false
}
// Filter by country
if !s.isCountryMatch(server) {
return false
}
// Skip servers with no physical servers
if len(server.Servers) == 0 {
return false
}
return true
}
func (s *ServerSelector) isCountryMatch(server *api.LogicalServer) bool {
for _, country := range s.config.Countries {
if server.ExitCountry == country {
return true
}
}
return false
}
func (s *ServerSelector) buildNoServersError() error {
errMsg := fmt.Sprintf("No suitable servers found for countries: %v", s.config.Countries)
if s.config.SecureCoreOnly {
errMsg += " with Secure Core"
} else if s.config.P2PServersOnly {
errMsg += " with P2P support"
}
return errors.New(errMsg)
}
// GetBestPhysicalServer returns the best physical server from a logical server
func GetBestPhysicalServer(server *api.LogicalServer) *api.PhysicalServer {
if len(server.Servers) == 0 {
return nil
}
// Find the first online physical server
for i := range server.Servers {
if server.Servers[i].Status == constants.StatusOnline {
return &server.Servers[i]
}
}
// If no online servers, return the first one
return &server.Servers[0]
}
// printDebugServerList prints a debug list of filtered servers
func (s *ServerSelector) printDebugServerList(servers []api.LogicalServer) {
fmt.Printf("\nDEBUG: Found %d servers after filtering:\n", len(servers))
fmt.Println("==================================================================================")
fmt.Printf("%-15s | %-18s | %-12s | Load | Score | Features\n", "Server", "City", "Tier")
fmt.Println("----------------------------------------------------------------------------------")
for i := range servers {
features := api.GetFeatureNames(servers[i].Features)
featureStr := "-"
if len(features) > 0 {
featureStr = strings.Join(features, ", ")
}
fmt.Printf("%-15s | %-18s | %-12s | %3d%% | %.2f | %s\n",
servers[i].Name,
servers[i].City,
api.GetTierName(servers[i].Tier),
servers[i].Load,
servers[i].Score,
featureStr)
}
fmt.Println("==================================================================================")
}

148
protonvpn-wg-confgen/pkg/timeutil/duration.go Normal file
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// Package timeutil provides time-related utility functions.
package timeutil
import (
"fmt"
"strings"
"time"
)
// pluralize returns singular or plural form based on count
func pluralize(count int, singular, plural string) string {
if count == 1 {
return fmt.Sprintf("1 %s", singular)
}
return fmt.Sprintf("%d %s", count, plural)
}
// formatTimeComponents formats non-zero time components into a string
func formatTimeComponents(parts []string) string {
return strings.Join(parts, " ")
}
// formatWeeksAndDays formats weeks and remaining days
func formatWeeksAndDays(days int) []string {
var parts []string
weeks := days / 7
remainingDays := days % 7
if weeks > 0 {
parts = append(parts, pluralize(weeks, "week", "weeks"))
}
if remainingDays > 0 {
parts = append(parts, pluralize(remainingDays, "day", "days"))
}
return parts
}
// formatHoursMinutes formats hours and minutes
func formatHoursMinutes(hours, minutes int) string {
switch {
case hours > 0 && minutes > 0:
return fmt.Sprintf("%d hours %d minutes", hours, minutes)
case hours > 0:
return fmt.Sprintf("%d hours", hours)
default:
return fmt.Sprintf("%d minutes", minutes)
}
}
// formatDaysHoursMinutes formats days, hours, and minutes into a string
func formatDaysHoursMinutes(days, hours, minutes int) string {
// Simple days format (less than a week)
if days < 7 {
return formatSimpleDays(days, hours, minutes)
}
// Weeks format
parts := formatWeeksAndDays(days)
if hours > 0 || minutes > 0 {
parts = append(parts, formatHoursMinutes(hours, minutes))
}
return formatTimeComponents(parts)
}
// formatSimpleDays formats days less than a week with hours and minutes
func formatSimpleDays(days, hours, minutes int) string {
if hours == 0 && minutes == 0 {
return pluralize(days, "day", "days")
}
if minutes == 0 {
return fmt.Sprintf("%d days %d hours", days, hours)
}
return fmt.Sprintf("%d days %d hours %d minutes", days, hours, minutes)
}
// HumanizeDuration converts a duration to a human-readable format with high precision.
// It shows progressively less detail for longer durations:
// - Less than a minute: "less than a minute"
// - Less than an hour: "X minutes"
// - Less than a day: "X hours Y minutes"
// - Less than a week: "X days Y hours Z minutes"
// - Less than a month: "X weeks Y days Z hours W minutes"
// - Longer periods: months and years with appropriate detail
func HumanizeDuration(d time.Duration) string {
if d < 0 {
return "expired"
}
if d < time.Minute {
return "less than a minute"
}
if d < time.Hour {
return pluralize(int(d.Minutes()), "minute", "minutes")
}
if d < 24*time.Hour {
return formatHoursDuration(d)
}
days := int(d.Hours() / 24)
hours := int(d.Hours()) % 24
minutes := int(d.Minutes()) % 60
if days < 30 {
return formatDaysHoursMinutes(days, hours, minutes)
}
if days < 365 {
return formatMonthsDuration(days)
}
return formatYearsDuration(days)
}
// formatHoursDuration formats durations less than a day
func formatHoursDuration(d time.Duration) string {
hours := int(d.Hours())
minutes := int(d.Minutes()) % 60
if minutes == 0 {
return pluralize(hours, "hour", "hours")
}
return fmt.Sprintf("%d hours %d minutes", hours, minutes)
}
// formatMonthsDuration formats durations between 30 and 365 days
func formatMonthsDuration(days int) string {
months := days / 30
remainingDays := days % 30
if remainingDays == 0 {
return pluralize(months, "month", "months")
}
return fmt.Sprintf("%d months %d days", months, remainingDays)
}
// formatYearsDuration formats durations of 365 days or more
func formatYearsDuration(days int) string {
years := days / 365
remainingDays := days % 365
if remainingDays == 0 {
return pluralize(years, "year", "years")
}
if remainingDays < 30 {
return fmt.Sprintf("%d years %d days", years, remainingDays)
}
months := remainingDays / 30
return fmt.Sprintf("%d years %d months", years, months)
}

81
protonvpn-wg-confgen/pkg/timeutil/parser.go Normal file
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package timeutil
import (
"fmt"
"strconv"
"strings"
"time"
)
// parseDaysDuration handles duration strings like "7d", "30d", "365d"
func parseDaysDuration(durationStr string) (time.Duration, error) {
if !strings.HasSuffix(durationStr, "d") {
return 0, fmt.Errorf("not a day duration format")
}
daysStr := strings.TrimSuffix(durationStr, "d")
days, err := strconv.Atoi(daysStr)
if err != nil {
return 0, fmt.Errorf("invalid day value: %s", daysStr)
}
return time.Duration(days) * 24 * time.Hour, nil
}
// ParseDuration parses a duration string that can be either Go duration or "Xd" format
func ParseDuration(durationStr string) (time.Duration, error) {
// Try days format first
if duration, err := parseDaysDuration(durationStr); err == nil {
return duration, nil
}
// Fall back to standard Go duration
return time.ParseDuration(durationStr)
}
// ParseToMinutes parses a duration string and converts it to minutes for the ProtonVPN API.
// Accepts formats like "7d", "30d", "365d", "30m", "24h", "1h30m".
// Returns the duration in "XXX min" format as expected by the API.
func ParseToMinutes(durationStr string) (string, error) {
duration, err := ParseDuration(durationStr)
if err != nil {
return "", fmt.Errorf("invalid duration format: %s", durationStr)
}
// Convert to minutes
minutes := int(duration.Minutes())
if minutes < 1 {
return "", fmt.Errorf("duration must be at least 1 minute")
}
// Max 365 days = 525600 minutes
maxMinutes := 365 * 24 * 60
if minutes > maxMinutes {
return "", fmt.Errorf("duration cannot exceed 365 days")
}
return fmt.Sprintf("%d min", minutes), nil
}
// ParseSessionDuration parses a session duration string for local caching.
// Accepts formats like "7d", "30d", or standard Go duration strings.
// Returns 0 to indicate "use API default".
func ParseSessionDuration(durationStr string) (time.Duration, error) {
// Handle "0" as use API default
if durationStr == "0" {
return 0, nil
}
duration, err := ParseDuration(durationStr)
if err != nil {
return 0, fmt.Errorf("invalid session duration format: %s", durationStr)
}
// Validate max duration (30 days)
maxDuration := 30 * 24 * time.Hour
if duration > maxDuration {
return 0, fmt.Errorf("session duration cannot exceed 30 days (got: %s)", duration)
}
return duration, nil
}

31
protonvpn-wg-confgen/pkg/validation/username.go Normal file
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// Package validation provides input validation utilities.
package validation
import (
"strings"
)
// CleanUsername removes email domain suffixes from username.
// ProtonVPN usernames don't include the email domain.
func CleanUsername(username string) string {
username = strings.TrimSpace(username)
username = strings.TrimSuffix(username, "@protonmail.com")
username = strings.TrimSuffix(username, "@proton.me")
username = strings.TrimSuffix(username, "@pm.me")
return username
}
// IsValidCountryCode checks if a country code is valid (2 letters).
func IsValidCountryCode(code string) bool {
return len(code) == 2 && isAlpha(code)
}
// isAlpha checks if a string contains only alphabetic characters.
func isAlpha(s string) bool {
for _, r := range s {
if (r < 'A' || r > 'Z') && (r < 'a' || r > 'z') {
return false
}
}
return true
}

140
protonvpn-wg-confgen/pkg/wireguard/config.go Normal file
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// Package wireguard generates WireGuard configuration files.
package wireguard
import (
"bytes"
"fmt"
"os"
"strings"
"text/template"
"time"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/config"
"protonvpn-wg-confgen/internal/constants"
)
// wireguardConfigTemplate is the template for generating WireGuard configuration
const wireguardConfigTemplate = `[Interface]
PrivateKey = {{.PrivateKey}}
{{.AddressLine}}
DNS = {{.DNS}}
[Peer]
PublicKey = {{.PublicKey}}
AllowedIPs = {{.AllowedIPs}}
Endpoint = {{.Endpoint}}:{{.Port}}
`
// configData holds the data for the WireGuard config template
type configData struct {
PrivateKey string
AddressLine string
DNS string
PublicKey string
AllowedIPs string
Endpoint string
Port int
}
// ConfigGenerator generates WireGuard configuration files
type ConfigGenerator struct {
config *config.Config
template *template.Template
}
// NewConfigGenerator creates a new configuration generator
func NewConfigGenerator(cfg *config.Config) *ConfigGenerator {
tmpl := template.Must(template.New("wireguard").Parse(wireguardConfigTemplate))
return &ConfigGenerator{
config: cfg,
template: tmpl,
}
}
// Generate creates a WireGuard configuration file
func (g *ConfigGenerator) Generate(server *api.LogicalServer, physicalServer *api.PhysicalServer, privateKey string) error {
content, err := g.buildConfig(server, physicalServer, privateKey)
if err != nil {
return err
}
if err := os.WriteFile(g.config.OutputFile, []byte(content), 0o600); err != nil {
return fmt.Errorf("failed to write config file: %w", err)
}
return nil
}
func (g *ConfigGenerator) buildConfig(server *api.LogicalServer, physicalServer *api.PhysicalServer, privateKey string) (string, error) {
// Build metadata header
metadata := g.buildMetadata(server, physicalServer)
data := configData{
PrivateKey: privateKey,
AddressLine: g.buildAddressLine(),
DNS: strings.Join(g.config.DNSServers, ", "),
PublicKey: physicalServer.X25519PublicKey,
AllowedIPs: strings.Join(g.config.AllowedIPs, ", "),
Endpoint: physicalServer.EntryIP,
Port: constants.WireGuardPort,
}
var buf bytes.Buffer
if err := g.template.Execute(&buf, data); err != nil {
return "", fmt.Errorf("failed to execute template: %w", err)
}
return metadata + buf.String(), nil
}
func (g *ConfigGenerator) buildAddressLine() string {
if g.config.EnableIPv6 {
return fmt.Sprintf("Address = %s, %s", constants.WireGuardIPv4, constants.WireGuardIPv6)
}
return fmt.Sprintf("Address = %s", constants.WireGuardIPv4)
}
func (g *ConfigGenerator) buildMetadata(server *api.LogicalServer, physicalServer *api.PhysicalServer) string {
var metadata strings.Builder
metadata.WriteString("# ProtonVPN WireGuard Configuration\n")
metadata.WriteString(fmt.Sprintf("# Generated: %s\n", time.Now().Format("2006-01-02 15:04:05 MST")))
if g.config.DeviceName != "" {
metadata.WriteString(fmt.Sprintf("# Device: %s\n", g.config.DeviceName))
}
metadata.WriteString("#\n")
metadata.WriteString("# Server Information:\n")
metadata.WriteString(fmt.Sprintf("# - Name: %s\n", server.Name))
metadata.WriteString(fmt.Sprintf("# - Country: %s\n", server.ExitCountry))
metadata.WriteString(fmt.Sprintf("# - City: %s\n", server.City))
metadata.WriteString(fmt.Sprintf("# - Tier: %s\n", api.GetTierName(server.Tier)))
metadata.WriteString(fmt.Sprintf("# - Load: %d%%\n", server.Load))
metadata.WriteString(fmt.Sprintf("# - Score: %.2f\n", server.Score))
// Add features if any
features := api.GetFeatureNames(server.Features)
if len(features) > 0 {
metadata.WriteString(fmt.Sprintf("# - Features: %s\n", strings.Join(features, ", ")))
}
// Add physical server info
metadata.WriteString("#\n")
metadata.WriteString("# Physical Server:\n")
metadata.WriteString(fmt.Sprintf("# - ID: %s\n", physicalServer.ID))
metadata.WriteString(fmt.Sprintf("# - Entry IP: %s\n", physicalServer.EntryIP))
if physicalServer.ExitIP != physicalServer.EntryIP {
metadata.WriteString(fmt.Sprintf("# - Exit IP: %s\n", physicalServer.ExitIP))
}
// Add secure core routing info if applicable
if server.EntryCountry != server.ExitCountry && server.EntryCountry != "" {
metadata.WriteString("#\n")
metadata.WriteString(fmt.Sprintf("# Secure Core Routing: %s → %s\n",
server.EntryCountry, server.ExitCountry))
}
metadata.WriteString("#\n\n")
return metadata.String()
}

119
protonvpn-wg-confgen/pkg/wireguard/config_test.go Normal file
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package wireguard
import (
"strings"
"testing"
"protonvpn-wg-confgen/internal/api"
"protonvpn-wg-confgen/internal/config"
)
func TestConfigGeneration(t *testing.T) {
cfg := &config.Config{
DNSServers: []string{"10.2.0.1"},
AllowedIPs: []string{"0.0.0.0/0"},
OutputFile: "test.conf",
}
generator := NewConfigGenerator(cfg)
server := &api.LogicalServer{
Name: "Test-Server",
}
physicalServer := &api.PhysicalServer{
EntryIP: "192.168.1.1",
X25519PublicKey: "testPublicKey123=",
}
privateKey := "testPrivateKey456="
result, err := generator.buildConfig(server, physicalServer, privateKey)
if err != nil {
t.Fatalf("buildConfig failed: %v", err)
}
// Check that config starts with comment header
if !strings.HasPrefix(result, "# ProtonVPN WireGuard Configuration") {
t.Errorf("Expected config to start with header comment, got:\n%s", result[:100])
}
// Check that metadata is present
if !strings.Contains(result, "# - Name: Test-Server") {
t.Errorf("Expected server name in metadata")
}
// Check for proper WireGuard sections
if !strings.Contains(result, "[Interface]") {
t.Error("Expected [Interface] section")
}
if !strings.Contains(result, "[Peer]") {
t.Error("Expected [Peer] section")
}
// Verify key content
expectedContent := []string{
"PrivateKey = testPrivateKey456=",
"Address = 10.2.0.2/32",
"DNS = 10.2.0.1",
"PublicKey = testPublicKey123=",
"AllowedIPs = 0.0.0.0/0",
"Endpoint = 192.168.1.1:51820",
}
for _, expected := range expectedContent {
if !strings.Contains(result, expected) {
t.Errorf("Expected config to contain '%s'\nGot:\n%s", expected, result)
}
}
// Check section order: [Interface] should come before [Peer]
interfaceIdx := strings.Index(result, "[Interface]")
peerIdx := strings.Index(result, "[Peer]")
if interfaceIdx >= peerIdx {
t.Error("[Interface] section should come before [Peer] section")
}
}
func TestConfigGenerationWithIPv6(t *testing.T) {
cfg := &config.Config{
DNSServers: []string{"10.2.0.1", "2a07:b944::2:1"},
AllowedIPs: []string{"0.0.0.0/0", "::/0"},
OutputFile: "test.conf",
EnableIPv6: true,
}
generator := NewConfigGenerator(cfg)
server := &api.LogicalServer{
Name: "Test-Server",
}
physicalServer := &api.PhysicalServer{
EntryIP: "192.168.1.1",
X25519PublicKey: "testPublicKey123=",
}
privateKey := "testPrivateKey456="
result, err := generator.buildConfig(server, physicalServer, privateKey)
if err != nil {
t.Fatalf("buildConfig failed: %v", err)
}
// Check that IPv6 address is included
if !strings.Contains(result, "Address = 10.2.0.2/32, 2a07:b944::2:2/128") {
t.Errorf("Expected IPv6 address in config, got:\n%s", result)
}
// Check DNS servers
if !strings.Contains(result, "DNS = 10.2.0.1, 2a07:b944::2:1") {
t.Errorf("Expected both DNS servers in config, got:\n%s", result)
}
// Check AllowedIPs
if !strings.Contains(result, "AllowedIPs = 0.0.0.0/0, ::/0") {
t.Errorf("Expected both IPv4 and IPv6 in AllowedIPs, got:\n%s", result)
}
}