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Added CloudFlare auto-loading of trusted proxy IP addresses.

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This commit is contained in:
Ylian Saint-Hilaire 2020-12-10 13:56:15 -08:00
parent 182d5fb295
commit 370d890b86
3 changed files with 59 additions and 4 deletions
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22
certoperations.js
View File

@ -284,6 +284,26 @@ module.exports.CertificateOperations = function (parent) {
return r;
}
// Return a text file from a remote HTTPS server
obj.loadTextFile = function (url, tag, func) {
const u = require('url').parse(url);
if (u.protocol == 'https:') {
// Read from HTTPS
const https = require('https');
https.get(url, function(resp) {
var data = '';
resp.on('data', function(chunk) { data += chunk; });
resp.on('end', function () { func(url, data, tag); });
resp.on('error', function (chunk) { func(url, null, tag); });
}).on('error', function (err) { func(url, null, tag); });
} else if (u.protocol == 'file:') {
// Read a file
obj.fs.readFile(url.substring(7), 'utf8', function (err, data) {
func(url, err ? null : data, tag);
});
} else { func(url, null, tag); }
};
// Return the certificate of the remote HTTPS server
obj.loadCertificate = function (url, hostname, tag, func) {
const u = require('url').parse(url);
@ -304,7 +324,7 @@ module.exports.CertificateOperations = function (parent) {
} else if (u.protocol == 'file:') {
// Read the certificate from a file
obj.fs.readFile(url.substring(7), 'utf8', function (err, data) {
if (err) { func(url, null, tag); return; }
if (err) { func(url, null, hostname, tag); return; }
var x1 = data.indexOf('-----BEGIN CERTIFICATE-----'), x2 = data.indexOf('-----END CERTIFICATE-----');
if ((x1 >= 0) && (x2 > x1)) {
func(url, Buffer.from(data.substring(x1 + 27, x2), 'base64').toString('binary'), hostname, tag);

30
meshcentral.js
View File

@ -1325,8 +1325,36 @@ function CreateMeshCentralServer(config, args) {
}
}
// Update proxy certificates
if (obj.supportsProxyCertificatesRequest == true) { obj.updateProxyCertificates(true); }
obj.StartEx4(); // Keep going
// Load CloudFlare trusted proxies list if needed
if ((obj.config.settings.trustedproxy != null) && (obj.config.settings.trustedproxy.toLowerCase() == 'cloudflare')) {
delete obj.args.trustedproxy;
delete obj.config.settings.trustedproxy;
obj.certificateOperations.loadTextFile('https://www.cloudflare.com/ips-v4', null, function (url, data, tag) {
if (data != null) {
if (Array.isArray(obj.args.trustedproxy) == false) { obj.args.trustedproxy = []; }
var ipranges = data.split('\n');
for (var i in ipranges) { if (ipranges[i] != '') { obj.args.trustedproxy.push(ipranges[i]); } }
obj.certificateOperations.loadTextFile('https://www.cloudflare.com/ips-v6', null, function (url, data, tag) {
if (data != null) {
var ipranges = data.split('\n');
for (var i in ipranges) { if (ipranges[i] != '') { obj.args.trustedproxy.push(ipranges[i]); } }
obj.config.settings.trustedproxy = obj.args.trustedproxy;
} else {
addServerWarning("Unable to load CloudFlare trusted proxy IPv6 address list.");
}
obj.StartEx4(); // Keep going
});
} else {
addServerWarning("Unable to load CloudFlare trusted proxy IPv4 address list.");
obj.StartEx4(); // Keep going
}
});
} else {
obj.StartEx4(); // Keep going
}
}
// Start the server with the given certificates

11
webserver.js
View File

@ -4885,8 +4885,8 @@ module.exports.CreateWebServer = function (parent, db, args, certificates) {
if (typeof req.connection.remoteAddress == 'string') { ipex = (req.connection.remoteAddress.startsWith('::ffff:')) ? req.connection.remoteAddress.substring(7) : req.connection.remoteAddress; }
if (
(obj.args.trustedproxy === true) ||
((typeof obj.args.trustedproxy == 'object') && (obj.args.trustedproxy.indexOf(ipex) >= 0)) ||
((typeof obj.args.tlsoffload == 'object') && (obj.args.tlsoffload.indexOf(ipex) >= 0))
((typeof obj.args.trustedproxy == 'object') && (isIPMatch(ipex, obj.args.trustedproxy))) ||
((typeof obj.args.tlsoffload == 'object') && (isIPMatch(ipex, obj.args.tlsoffload)))
) {
// Get client IP
if (req.headers['cf-connecting-ip']) { // Use CloudFlare IP address if present
@ -6606,6 +6606,13 @@ module.exports.CreateWebServer = function (parent, db, args, certificates) {
} catch (ex) { console.log(ex); func(fd, tag); }
}
// Perform a IP match against a list
function isIPMatch(ip, matchList) {
const ipcheck = require('ipcheck');
for (var i in matchList) { if (ipcheck.match(ip, matchList[i]) == true) return true; }
return false;
}
// This is the invalid login throttling code
obj.badLoginTable = {};
obj.badLoginTableLastClean = 0;