Parker2991/node-minecraft-protocol
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ability to exempt usernames from online mode or offline mode

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This commit is contained in:
Andrew Kelley 2013-02-03 18:11:19 -05:00
parent 666a24ed9e
commit cd7f867d95
3 changed files with 68 additions and 45 deletions
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13
README.md
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@ -108,6 +108,19 @@ server.on('login', function(client) {
* `playerCount`
* `maxPlayers`
### mc.createServer(options)
Returns a `Server` instance and starts listening.
### Server
#### server.onlineModeExceptions
This is a plain old JavaScript object. Add a key with the username you want to
be exempt from online mode or offline mode (whatever mode the server is in).
#### server.maxPlayers
### Not Immediately Obvious Data Type Formats
#### entityMetadata

97
index.js
View file

@ -3,6 +3,7 @@ var EventEmitter = require('events').EventEmitter
, assert = require('assert')
, ursa = require('ursa')
, crypto = require('crypto')
, bufferEqual = require('buffer-equal')
, superagent = require('superagent')
, protocol = require('./lib/protocol')
, Client = require('./lib/client')
@ -35,6 +36,7 @@ function createServer(options) {
var serverKey = ursa.generatePrivateKey(1024);
var server = new Server(options);
server.onlineModeExceptions = {};
server.maxPlayers = maxPlayers;
server.on("connection", function(client) {
client.once(0xfe, onPing);
@ -101,8 +103,10 @@ function createServer(options) {
function onHandshake(packet) {
client.username = packet.username;
var isException = !!server.onlineModeExceptions[client.username];
var needToVerify = (onlineMode && ! isException) || (! onlineMode && isException);
var serverId;
if (onlineMode) {
if (needToVerify) {
serverId = crypto.randomBytes(4).toString('hex');
} else {
serverId = '-';
@ -128,50 +132,55 @@ function createServer(options) {
}
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) {
var myErr;
if (err) {
server.emit('error', err);
client.end('McSessionUnavailable');
} else if (resp.serverError) {
myErr = new Error("session.minecraft.net is broken: " + resp.status);
myErr.code = 'EMCSESSION500';
server.emit('error', myErr);
client.end('McSessionDown');
} else if (resp.serverError) {
myErr = new Error("session.minecraft.net rejected request: " + resp.status);
myErr.code = 'EMCSESSION400';
server.emit('error', myErr);
client.end('McSessionRejectedAuthRequest');
} else if (resp.text !== "YES") {
client.end('FailedToVerifyUsername');
} else {
loginClient();
}
});
}
client.write(0xFC, {
sharedSecret: new Buffer(0),
verifyToken: new Buffer(0)
});
client.encryptionEnabled = true;
if (! onlineMode) loginClient();
} else {
var verifyToken = serverKey.decrypt(packet.verifyToken, undefined, undefined, ursa.RSA_PKCS1_PADDING);
if (! bufferEqual(client.verifyToken, verifyToken)) {
client.end('DidNotEncryptVerifyTokenProperly');
return;
}
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);
client.write(0xFC, {
sharedSecret: new Buffer(0),
verifyToken: new Buffer(0)
});
client.encryptionEnabled = true;
var isException = !!server.onlineModeExceptions[client.username];
var needToVerify = (onlineMode && ! isException) || (! onlineMode && isException);
var nextStep = needToVerify ? verifyUsername : loginClient;
nextStep();
function verifyUsername() {
var digest = mcHexDigest(hash);
var request = superagent.get("http://session.minecraft.net/game/checkserver.jsp");
request.query({
user: client.username,
serverId: digest
});
request.end(function(err, resp) {
var myErr;
if (err) {
server.emit('error', err);
client.end('McSessionUnavailable');
} else if (resp.serverError) {
myErr = new Error("session.minecraft.net is broken: " + resp.status);
myErr.code = 'EMCSESSION500';
server.emit('error', myErr);
client.end('McSessionDown');
} else if (resp.serverError) {
myErr = new Error("session.minecraft.net rejected request: " + resp.status);
myErr.code = 'EMCSESSION400';
server.emit('error', myErr);
client.end('McSessionRejectedAuthRequest');
} else if (resp.text !== "YES") {
client.end('FailedToVerifyUsername');
} else {
loginClient();
}
});
}
}

3
package.json
View file

@ -34,6 +34,7 @@
},
"dependencies": {
"ursa": "~0.8.0",
"superagent": "~0.10.0"
"superagent": "~0.10.0",
"buffer-equal": "0.0.0"
}
}