feat(app): add support for SSL certificate as part of the container

Dockerfile

@@ -40,6 +40,8 @@ ENV GUACD_PORT=4822
 ENV CRYPT_CYPHER='AES-256-CBC'
 ENV LOG_LEVEL='info'
 ENV USER_DRIVE_ROOT='/user-drives'
+ENV SSL_CERT_PATH='/app/certificate.pem'
+ENV SSL_KEY_PATH='/app/certificate-key.pem'
 EXPOSE 8080
 
 RUN mkdir -p /user-drives && chown -R guacd:guacd /user-drives

server.js

@@ -2,6 +2,8 @@
 
 const packageFile = require('./package.json');
 const GuacamoleLite = require('./lib/Server');
+const Https = require('https');
+const fs = require('fs');
 const { createLogger, transports, format } = require('winston');
 const { combine, splat, timestamp, printf } = format;
 
@@ -11,6 +13,8 @@ const CRYPT_CYPHER = process.env.CRYPT_CYPHER || 'AES-256-CBC';
 const GUACD_HOST = process.env.GUACD_HOST || '127.0.0.1';
 const GUACD_PORT = process.env.GUACD_PORT || 4822;
 const USER_DRIVE_ROOT = process.env.USER_DRIVE_ROOT || '/tmp/drives'
+const SSL_CERT_PATH = process.env.SSL_CERT_PATH;
+const SSL_KEY_PATH = process.env.SSL_KEY_PATH;
 
 const loggerFormat = printf( ({ level, message, timestamp , ...metadata}) => {
     let msg = `${timestamp} [${level}] : ${message} `
@@ -33,18 +37,33 @@ const logger = createLogger({
     ]
 });
 
-function start(cryptKey, cryptCypher , websocketPort , guacdHost, guacdPort) {
+function start(cryptKey, cryptCypher, websocketPort , guacdHost, guacdPort) {
     logger.info('[GUACWS] Starting Server');
-    logger.info('[GUACWS] Version ' + packageFile.version);
+    logger.info(`[GUACWS] Version ${packageFile.version}`);
 
     if (!cryptKey || cryptKey.length === 0) {
         logger.error('[GUACWS] No secret key specified, please specify a key with CRYPT_SECRET environment variable');
         return;
     }
 
-    const websocketOptions = {
-        port: websocketPort
-    };
+    let httpsServer = undefined;
+    if (SSL_CERT_PATH && SSL_KEY_PATH) {
+        try {
+            const hasCert = fs.existsSync(SSL_CERT_PATH);
+            const hasKey = fs.existsSync(SSL_KEY_PATH);
+
+            if (hasCert && hasKey) {
+                httpsServer = Https.createServer({
+                    cert: fs.readFileSync(SSL_CERT_PATH),
+                    key: fs.readFileSync(SSL_KEY_PATH),
+                });
+            }
+        } catch (err) {
+            logger.error('[GUACWS] Could not load SSL certificate/key, please check the SSL certificate key and path exist and are valid');
+            return;
+        }
+    }
+    const websocketOptions = httpsServer ? { server: httpsServer } : { port: websocketPort };
 
     const guacdOptions = {
         host: guacdHost,
@@ -61,21 +80,21 @@ function start(cryptKey, cryptCypher , websocketPort , guacdHost, guacdPort) {
     const callbacks = {
         processConnectionSettings: function (settings, callback) {
             if (settings.userFolder) {
-                settings.connection['drive-path'] = USER_DRIVE_ROOT + '/user_' + settings.userFolder;
+                settings.connection['drive-path'] = `${USER_DRIVE_ROOT}/user_${settings.userFolder}`;
             }
 
             callback(null, settings);
         }
     };
 
-    logger.info('[GUACWS] WebSocket on ws://0.0.0.0:' + websocketPort);
-    logger.info('[GUACWS] GuacD host on ' + guacdHost + ':' + guacdPort);
+    logger.info(`[GUACWS] WebSocket on ${httpsServer ? 'wss' : 'ws'}://0.0.0.0:${websocketPort}`);
+    logger.info(`[GUACWS] GuacD host on ${guacdHost}:${guacdPort}`);
     return new GuacamoleLite(logger, websocketOptions, guacdOptions, clientOptions, callbacks);
 }
 
 const server = start(CRYPT_SECRET, CRYPT_CYPHER, PORT, GUACD_HOST, GUACD_PORT);
 if (server) {
-    logger.info('[GUACWS] WebSocket Tunnel running on ws://0.0.0.0:' + PORT);
+    logger.info('[GUACWS] WebSocket Tunnel running');
 } else {
     logger.error('[GUACWS] Failed to start WebSocket Tunnel');
 }