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add rest of the parsing pipeline. Works but the client is sending unparsable packet in a batch

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Romain Beaumont 2016-06-18 13:07:13 +02:00
commit b86eb6a80f
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GPG key ID: DB60E388B3BCF286
1 changed files with 55 additions and 3 deletions
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58
src/createServer.js
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@ -2,10 +2,12 @@
const raknet = require('raknet');
const zlib = require('zlib');
const ProtoDef = require('protodef').ProtoDef;
const Parser = require('protodef').Parser;
const jwt = require('jwt-simple');
const crypto = require('crypto');
const Ber = require('asn1').Ber;
const merge=require("lodash.merge");
const assert=require("assert");
// const BN = require('bn.js');
const batchProto = new ProtoDef();
@ -29,6 +31,10 @@ dataProto.addType("data_chain", ["container", [{
}]
}]]);
const Transform = require('stream').Transform;
const PUBLIC_KEY = 'MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE8ELkixyLcwlZryUQcu1TvPOmI2B7vX83ndnWRUaXm74wFfa5f/lwQNTfrLVHa2PmenpGI6JhIMUJaWZrjmMj90NoKNFSNBuKdm8rYiXsfaz3K36x/1U26HpG0ZxK/V1V';
var encryptionEnabled = false;
var sendCounter = 0;
@ -74,11 +80,13 @@ function createServer(options) {
server.on("connection", function(client) {
client.counter=0;
//if(encryptionEnabled) {
// client.on('mcpe', packet => { decipher.write(packet); })
//} else {
client.on("mcpe", packet => {
console.log("actual mcpe",packet);
client.emit(packet.name, packet.params)
});
//}
@ -127,12 +135,13 @@ function createServer(options) {
});
//console.log('secret', new Buffer(client.secretKeyBytes));
var decipher = crypto.createDecipheriv('aes-256-cfb8', client.secretKeyBytes, client.secretKeyBytes.slice(0,16));
let customPackets=require("../data/protocol");
customPackets['types']['encapsulated_packet'][1][1]['type'][1]['fields']['mcpe'] = 'restBuffer';
let customPackets=JSON.parse(JSON.stringify(require("../data/protocol")));
customPackets['types']['encapsulated_packet'][1][1]['type'][1]['fields']['mcpe_encrypted'] = 'restBuffer';
customPackets['types']['encapsulated_packet'][1][0]['type'][1]['mappings']['0xfe'] = 'mcpe_encrypted';
client.encapsulatedPacketParser.proto.addTypes(merge(require('raknet').protocol, customPackets).types);
encryptionEnabled = true;
client.on("mcpe", packet => {
client.on("mcpe_encrypted", packet => {
//console.log('THE CONSOLELOG')
//console.log(packet);
//console.log('---------------')
@ -140,6 +149,48 @@ function createServer(options) {
});
decipher.on('data', data => console.log('decrypt', data));
function writeLI64(value, buffer, offset) {
buffer.writeInt32LE(value[0], offset+4);
buffer.writeInt32LE(value[1], offset);
return offset + 8;
}
function computeCheckSum(packetPlaintext,sendCounter,secretKeyBytes) {
let digest = crypto.createHash('sha256');
let counter=new Buffer(8);
writeLI64(sendCounter,counter,0);
digest.update(counter);
digest.update(packetPlaintext);
digest.update(secretKeyBytes);
let hash = digest.digest();
return hash.slice(0,8);
}
const checksumTransform = new Transform({
transform(chunk,enc,cb) {
const packet=chunk.slice(0,chunk.length-8);
const checksum=chunk.slice(chunk.length-8);
const computedCheckSum=computeCheckSum(packet,[0,client.counter],client.secretKeyBytes);
const pass=checksum.toString("hex")==computedCheckSum.toString("hex");
//assert.equal(checksum.toString("hex"),computedCheckSum.toString("hex"));
client.counter++;
if(pass) this.push(packet);
cb();
}
});
checksumTransform.on("data",data => console.log('sliced',data));
decipher.pipe(checksumTransform);
const proto=new ProtoDef();
proto.addTypes(require("./datatypes/minecraft"));
proto.addTypes(require("../data/protocol").types);
const mcpePacketParser=new Parser(proto,"mcpe_packet");
checksumTransform.pipe(mcpePacketParser);
mcpePacketParser.on("data",parsed => console.log("parsed data",parsed));
mcpePacketParser.on("data",parsed => client.emitPacket(parsed));
//client.on('mcpe', packet => { decipher.write(packet); })
client.emit('login', {
@ -171,6 +222,7 @@ function createServer(options) {
client.on('batch', function(packet) {
var buf = zlib.inflateSync(packet.payload);
console.log("in batch",buf);
var packets = batchProto.parsePacketBuffer("insideBatch", buf).data;
packets.forEach(packet => client.readEncapsulatedPacket(Buffer.concat([new Buffer([0xfe]), packet])));
});