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Switch browser cookie signature from SHA1 to SHA384.

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Ylian Saint-Hilaire 2022-07-11 11:11:03 -07:00
parent a151dcbfe6
commit 626c490771
2 changed files with 16 additions and 6 deletions
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9
webrelayserver.js
View File

@ -61,11 +61,16 @@ module.exports.CreateWebRelayServer = function (parent, db, args, certificates,
}
}
// Setup a keygrip instance with higher default security, default hash is SHA1, we want to bump that up with SHA384
// If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
// If args.sessionkey is a string, use it as a single key, but args.sessionkey can also be used as an array of keys.
const keygrip = require('keygrip')((typeof obj.args.sessionkey == 'string') ? [obj.args.sessionkey] : obj.args.sessionkey, 'sha384', 'base64');
// Setup cookie session
var sessionOptions = {
const sessionOptions = {
name: 'xid', // Recommended security practice to not use the default cookie name
httpOnly: true,
keys: [args.sessionkey], // If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
keys: keygrip,
secure: (args.tlsoffload == null), // Use this cookie only over TLS (Check this: https://expressjs.com/en/guide/behind-proxies.html)
sameSite: (args.sessionsamesite ? args.sessionsamesite : 'lax')
}

13
webserver.js
View File

@ -5759,15 +5759,20 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
}
}
// Setup a keygrip instance with higher default security, default hash is SHA1, we want to bump that up with SHA384
// If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
// If args.sessionkey is a string, use it as a single key, but args.sessionkey can also be used as an array of keys.
const keygrip = require('keygrip')((typeof obj.args.sessionkey == 'string') ? [obj.args.sessionkey] : obj.args.sessionkey, 'sha384', 'base64');
// Setup the cookie session
var sessionOptions = {
const sessionOptions = {
name: 'xid', // Recommended security practice to not use the default cookie name
httpOnly: true,
keys: [obj.args.sessionkey], // If multiple instances of this server are behind a load-balancer, this secret must be the same for all instances
keys: keygrip,
secure: (obj.args.tlsoffload == null), // Use this cookie only over TLS (Check this: https://expressjs.com/en/guide/behind-proxies.html)
sameSite: (obj.args.sessionsamesite ? obj.args.sessionsamesite : 'lax')
}
if (obj.args.sessiontime != null) { sessionOptions.maxAge = (obj.args.sessiontime * 60 * 1000); }
if (obj.args.sessiontime != null) { sessionOptions.maxAge = (obj.args.sessiontime * 60000); } // sessiontime is minutes
obj.app.use(obj.session(sessionOptions));
// Handle all incoming web sockets, see if some need to be handled as web relays
@ -6689,7 +6694,7 @@ module.exports.CreateWebServer = function (parent, db, args, certificates, doneF
// No redirects allowed, fail here. This is important to make sure there is no redirect cascades
res.sendStatus(404);
} else {
// Request was made to a different host, redirect using the full URL so an HTTP cookie can be created on the other DNS name
// Request was made to a different host, redirect using the full URL so an HTTP cookie can be created on the other DNS name.
const httpport = ((args.aliasport != null) ? args.aliasport : args.port);
res.redirect('https://' + selectedHost + ((httpport != 443) ? (':' + httpport) : '') + req.url + '&noredirect=1');
}