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Blowfish key is now generate from client's handshake packet.

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This commit is contained in:
Filip Maj 2016-03-05 18:02:37 -05:00
parent 5acc769505
commit 88cb73bc09
5 changed files with 76 additions and 10 deletions
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42
FFXIVClassic_Lobby_Server/PacketProcessor.cs
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@ -9,6 +9,7 @@ using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
@ -23,6 +24,7 @@ namespace FFXIVClassic_Lobby_Server
if ((packet.header.packetSize == 0x288) && (packet.data[0x34] == 'T')) //Test Ticket Data
{
packet.debugPrintPacket();
//Crypto handshake
ProcessStartSession(client, packet);
return;
@ -65,13 +67,12 @@ namespace FFXIVClassic_Lobby_Server
private void ProcessStartSession(ClientConnection client, BasePacket packet)
{
UInt32 clientTime = BitConverter.ToUInt32(packet.data, 0x74);
SecurityHandshakePacket securityHandshake = new SecurityHandshakePacket(packet.data);
//We assume clientTime is 0x50E0E812, but we need to generate a proper key later
byte[] blowfishKey = { 0xB4, 0xEE, 0x3F, 0x6C, 0x01, 0x6F, 0x5B, 0xD9, 0x71, 0x50, 0x0D, 0xB1, 0x85, 0xA2, 0xAB, 0x43};
byte[] blowfishKey = GenerateKey(securityHandshake.ticketPhrase, securityHandshake.clientNumber);
client.blowfish = new Blowfish(blowfishKey);
Log.info(String.Format("Received encryption key: 0x{0:X}", clientTime));
Log.info(String.Format("SecCNum: 0x{0:X}", securityHandshake.clientNumber));
//Respond with acknowledgment
BasePacket outgoingPacket = new BasePacket(HardCoded_Packets.g_secureConnectionAcknowledgment);
@ -242,21 +243,21 @@ namespace FFXIVClassic_Lobby_Server
//Set Initial Position
switch (info.initialTown)
{
case 1:
case 1: //ocn0Battle02 (Limsa)
info.zoneId = 193;
info.x = 0.016f;
info.y = 10.35f;
info.z = -36.91f;
info.rot = 0.025f;
break;
case 2:
case 2: //fst0Battle03 (Gridania)
info.zoneId = 166;
info.x = 356.09f;
info.y = 3.74f;
info.z = -701.62f;
info.rot = -1.4f;
break;
case 3:
case 3: //wil0Battle01 (Ul'dah)
info.zoneId = 184;
info.x = 12.63f;
info.y = 196.05f;
@ -357,5 +358,32 @@ namespace FFXIVClassic_Lobby_Server
client.queuePacket(basePacket);
}
private byte[] GenerateKey(string ticketPhrase, uint clientNumber)
{
byte[] key;
using (MemoryStream memStream = new MemoryStream(0x2C))
{
using (BinaryWriter binWriter = new BinaryWriter(memStream))
{
binWriter.Write((Byte)0x78);
binWriter.Write((Byte)0x56);
binWriter.Write((Byte)0x34);
binWriter.Write((Byte)0x12);
binWriter.Write((UInt32)clientNumber);
binWriter.Write((Byte)0xE8);
binWriter.Write((Byte)0x03);
binWriter.Write((Byte)0x00);
binWriter.Write((Byte)0x00);
binWriter.Write(Encoding.ASCII.GetBytes(ticketPhrase), 0, Encoding.ASCII.GetByteCount(ticketPhrase) >= 0x20 ? 0x20 : Encoding.ASCII.GetByteCount(ticketPhrase));
}
byte[] nonMD5edKey = memStream.GetBuffer();
using (MD5 md5Hash = MD5.Create())
{
key = md5Hash.ComputeHash(nonMD5edKey);
}
}
return key;
}
}
}