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Added server encryption and online mode

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This commit is contained in:
Robin Lambertz 2013-01-27 01:12:09 +00:00
parent 0eb72c2046
commit ebc6af6a7e
2 changed files with 71 additions and 5 deletions

1
examples/server.js
View file

@ -3,7 +3,6 @@ var mc = require('../');
var yellow = '§e';
var options = {
'online-mode': false,
motd: 'Vox Industries',
'max-players': 127,
port: 25565,

75
index.js
View file

@ -30,13 +30,16 @@ function createServer(options) {
var checkTimeoutInterval = options.checkTimeoutInterval || 4 * 1000;
var motd = options.motd || "A Minecraft server";
var onlineMode = options['online-mode'] == null ? true : options['online-mode'];
assert.ok(! onlineMode, "online mode for servers is not yet supported");
var encryptionEnabled = options['enable-encryption'] == null ? true : options['enable-encryption'];
var serverKey = ursa.generatePrivateKey(1024);
var server = new Server(options);
server.maxPlayers = maxPlayers;
server.on("connection", function(client) {
client.once(0xfe, onPing);
client.on(0x02, onHandshake);
client.once(0x02, onHandshake);
client.once(0xFC, onEncryptionKeyResponse);
client.on('end', onEnd);
var keepAlive = false;
@ -46,6 +49,8 @@ function createServer(options) {
var keepAliveTimer = null;
var loginKickTimer = setTimeout(kickForNotLoggingIn, kickTimeout);
var hash;
function kickForNotLoggingIn() {
client.end('LoginTimeout');
}
@ -95,9 +100,71 @@ function createServer(options) {
}
function onHandshake(packet) {
assert.ok(! onlineMode);
loggedIn = true;
client.username = packet.username;
if (onlineMode) {
serverId = crypto.randomBytes(4).toString('hex');
} else {
serverId = '-';
}
if (encryptionEnabled) {
client.verifyToken = crypto.randomBytes(4);
var publicKeyStrArr = serverKey.toPublicPem("utf8").split("\n");
var publicKeyStr = "";
for (i=1;i<publicKeyStrArr.length - 2;i++) {
publicKeyStr += publicKeyStrArr[i]
}
client.publicKey = new Buffer(publicKeyStr,'base64');
hash = crypto.createHash("sha1");
hash.update(serverId);
client.write(0xFD, {
serverId: serverId,
publicKey: client.publicKey,
verifyToken: client.verifyToken
});
} else {
logInClient();
}
}
function onEncryptionKeyResponse(packet) {
var success = client.verifyToken.toString("hex") === serverKey.decrypt(packet.verifyToken, undefined, undefined, ursa.RSA_PKCS1_PADDING).toString("hex");
if (success) {
var sharedSecret = serverKey.decrypt(packet.sharedSecret, undefined, undefined, ursa.RSA_PKCS1_PADDING);
client.cipher = crypto.createCipheriv('aes-128-cfb8', sharedSecret, sharedSecret);
client.decipher = crypto.createDecipheriv('aes-128-cfb8', sharedSecret, sharedSecret);
hash.update(sharedSecret);
hash.update(client.publicKey);
var digest = mcHexDigest(hash);
if (onlineMode) {
var request = superagent.get("http://session.minecraft.net/game/checkserver.jsp");
request.query({
user: client.username,
serverId: digest
});
request.end(function (err,resp){
if (err) {
client.end('Error :', err);
return;
}
if (resp.text !== "YES") {
client.end('FailedToVerifyUsername');
return;
}
});
}
client.write(0xFC, {
sharedSecret: new Buffer(0),
verifyToken: new Buffer(0)
});
client.encryptionEnabled = true;
loginClient();
} else {
client.end('DidNotEncryptVerifyTokenProperly');
}
}
function loginClient() {
loggedIn = true;
startKeepAlive();
clearTimeout(loginKickTimer);