basic ssh relay functionality

src/background/ssh.js

@@ -0,0 +1,73 @@
+import appPath from './electronAppPath'
+const { spawn } = require('child_process')
+
+function getRandomInt(min, max) {
+	return Math.floor(Math.random() * (max - min)) + min;
+}
+
+let tryies = 5;
+
+const startSSH = (port, host, user, password, callback) => {
+	let remotePort = getRandomInt(10000, 65000)
+
+	if(tryies-- <= 0)
+	{
+		if(callback)
+			callback(false)	
+
+		return
+	}
+
+	const options = [
+		'-T', 
+		'-R', `0.0.0.0:${remotePort}:127.0.0.1:${port}`,
+		`${user}@${host}`,
+		'-pw', password,
+		'-v'
+	]
+	console.log(options)
+
+	const ssh = spawn(appPath('plink'), options)
+
+	const checkMessage = (data) => {
+		if(data.includes(`Remote port forwarding from 0.0.0.0:${remotePort}`))
+		{
+			if(data.includes('refused'))
+			{
+				ssh.kill()
+				startSSH(port, host, user, password, callback)
+			}
+			else if(data.includes('enabled'))
+			{
+				if(callback)
+					callback({address: host, port: remotePort})
+			}
+		}
+	}
+
+	ssh.stdout.on('data', (data) => {
+		console.log(`ssh: ${data}`)
+		checkMessage(data)
+	})
+
+	ssh.stderr.on('data', (data) => {
+		console.log(`ssh error: ${data}`);
+		checkMessage(data)
+		if(data.includes('Password authentication failed'))
+		{
+			ssh.kill()
+			if(callback)
+				callback(false)
+		}
+	});
+
+	ssh.on('close', (code, signal) => {
+		if(callback)
+			callback(false)
+		console.log(`ssh closed with code ${code} and signal ${signal}`)
+	})
+
+	return ssh
+}
+
+export default startSSH