/// <summary>
/// Verifies whether the packet is valid or not through the HMAC hash
/// </summary>
/// <param name="packetBuffer">The packet data the way it was received</param>
/// <param name="hmacKey"></param>
public static bool CheckHmac(byte[] packetBuffer, byte[] hmacKey)
{
using (HMACMD5 hmac = new HMACMD5(hmacKey))
{
// Gets the total data size from the packet buffer
short totalSize = BitConverter.ToInt16(BitConverter.IsLittleEndian ?
BytesUtil.ReadBytes(packetBuffer, 0, 2) : BytesUtil.ReadBytes(packetBuffer, 0, 2).Reverse().ToArray(), 0);
short dataSize = (short)(totalSize - 2 - CryptoConstants.GC_HMAC_SIZE);
byte[] computedHash = BytesUtil.ReadBytes(hmac.ComputeHash(packetBuffer, 2, dataSize),
0, CryptoConstants.GC_HMAC_SIZE);
byte[] storedHash = BytesUtil.ReadBytes(packetBuffer,
totalSize - CryptoConstants.GC_HMAC_SIZE,
CryptoConstants.GC_HMAC_SIZE);
// Compares both hashes to check the integrity
for (int i = 0; i < computedHash.Length; i++)
{
if (computedHash[i] != storedHash[i])
{
return(false);
}
}
return(true);
}
}
/// <summary>
/// Generates an HMAC hash to the encrypted packet data
/// </summary>
/// <param name="data">Packet data (excluding the packet size and the HMAC hash)</param>
/// <param name="hmacKey">HMAC Key</param>
internal static byte[] GenerateHmac(byte[] data, byte[] hmacKey)
{
using (HMACMD5 hmac = new HMACMD5(hmacKey))
{
// Generates the hash, truncates it to 10 bytes (HMAC_SIZE) and returns it
return(BytesUtil.ReadBytes(hmac.ComputeHash(data, 0, data.Length),
0, CryptoConstants.GC_HMAC_SIZE));
}
}
/// <summary>
/// Returns the compressed packet from the input data
/// </summary>
/// <param name="dataToCompress">Packet data to be compressed</param>
public static byte[] CompressPacket(byte[] dataToCompress)
{
using (MemoryStream memoryStream = new MemoryStream())
{
using (ZlibStream compressor =
new ZlibStream(memoryStream, CompressionMode.Compress, CompressionLevel.Level1))
{
compressor.Write(dataToCompress, 11, (dataToCompress.Length - 11));
}
return(BytesUtil.ConcatBytes(BytesUtil.ReadBytes(dataToCompress, 0, 11), memoryStream.ToArray()));
}
}
/// <summary>
/// Gets the received packet data and returns the decrypted data
/// </summary>
/// <param name="packetBuffer">The packet data the way it was received</param>
/// <param name="key">DES Encryption Key</param>
/// <param name="IV">Initialization vector</param>
public static byte[] DecryptPacket(byte[] packetBuffer, byte[] key, bool isHaveLength = false)
{
if (!isHaveLength)
{
packetBuffer = BytesUtil.ConcatBytes(BitConverter.GetBytes((short)(2 + packetBuffer.Length)), packetBuffer);
}
byte[] IV = BytesUtil.ReadBytes(packetBuffer, 8, 8);
using (DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider())
{
desProvider.Mode = CipherMode.CBC;
desProvider.Padding = PaddingMode.None;
using (ICryptoTransform decryptor = desProvider.CreateDecryptor(key, IV))
{
byte[] rawData = decryptor.TransformFinalBlock(packetBuffer, 16,
packetBuffer.Length - CryptoConstants.GC_HMAC_SIZE - 16);
return(rawData);
//return BytesUtil.ReadBytes(rawData, 0, (rawData.Length - (rawData[rawData.Length - 1] + 2)));
}
}
}
/*public void LoadSkilltree(ClientSession cs)
* {
* DataSet ds3 = new DataSet();
* Database.Query(ref ds3, "SELECT * FROM `skilltree` WHERE `LoginUI` = '{0}'", cs.LoginUID);
* Array.Resize(ref skillinfo, ds3.Tables[0].Rows.Count);
* for (int i = 0; i < skillinfo.Length; i++)
* {
* skillinfo[i].charindex =Convert.ToByte(ds3.Tables[0].Rows[i]["charindex"].ToString());
* LogFactory.GetLog("SKILL").LogInfo("CHARID: " + skillinfo[i].charindex);
* skillinfo[i].ui1 = Convert.ToByte(ds3.Tables[0].Rows[i]["ui1"].ToString());
* LogFactory.GetLog("SKILL").LogInfo("CHARID: " + skillinfo[i].ui1);
* skillinfo[i].ui2 = Convert.ToInt32(ds3.Tables[0].Rows[i]["ui2"].ToString());
* LogFactory.GetLog("SKILL").LogInfo("CHARID: " + skillinfo[i].ui2);
* }
* }*/
public void OnSetSkill(ClientSession cs, InPacket ip)
{
int unknown1 = ip.ReadInt();
int LoginUID = ip.ReadInt();
int UnknownCharNum = ip.ReadInt();
/*
* for(int i = 0; i < UnknownCharNum; i++)
* {
* int c = ip.ReadByte();
* byte u1= ip.ReadByte(); // ???
* int u2 = ip.ReadInt(); // ???
*
* LogFactory.GetLog("MAIN").LogInfo(" {0} / {1} / {2}", c, u1, u2);
* }
*/
int CharNum = ip.ReadInt();
for (int i = 0; i < CharNum; i++)
{
int CharType = ip.ReadByte();
ip.ReadByte(); // ?
ip.ReadInt(); // ? 00 00 00 02
ip.ReadInt(); // ? 00 00 00 00
int SkillCount = ip.ReadInt();
LogFactory.GetLog("MAIN").LogInfo(" CHARID :{0} / SKILLID: {1}", CharType, SkillCount);
int CharPos = findCharIndex(CharType);
if (CharPos != -1)
{
Array.Resize(ref MyChar[CharPos].EquipSkill, SkillCount);
for (int j = 0; j < SkillCount; j++)
{
ip.ReadInt(); // ? 00 00 00 00
int SkillGruop = ip.ReadInt();
int SkillID = ip.ReadInt();
MyChar[CharPos].EquipSkill[j].SkillGroup = SkillGruop;
MyChar[CharPos].EquipSkill[j].SkillID = SkillID;
}
}
ip.ReadInt(); // 00 00 00 01
ip.ReadInt(); // 00 00 00 00
}
using (OutPacket oPacket = new OutPacket(GameOpcodes.EVENT_SET_SKILL_BROAD))
{
oPacket.WriteInt(0);
byte[] data = ip.ToArray();
data = BytesUtil.ReadBytes(data, 4, data.Length - 4);
oPacket.WriteBytes(data);
/*
* oPacket.WriteInt(0);
* oPacket.WriteInt(cs.LoginUID);
* oPacket.WriteHexString("00 00 00 0B 00 00 00 00 00 00 01 00 00 00 00 00 02 00 00 00 00 00 05 00 00 00 00 00 0A FF 00 00 00 00 0A 00 00 00 00 00 0D 00 00 00 00 00 0E 00 00 00 00 00 0F 00 00 00 00 00 11 00 00 00 00 00 12 00 00 00 00 00");
* oPacket.WriteInt(MyChar.Length);
* for (int i = 0; i < MyChar.Length; i++)
* {
* oPacket.WriteByte((byte)MyChar[i].CharType);
* oPacket.WriteByte(0);
* oPacket.WriteInt(2);
* oPacket.WriteInt(0);
*
* oPacket.WriteInt(MyChar[i].skillinfo.Length);
* for (int j = 0; j < MyChar[i].skillinfo.Length; j++)
* {
* oPacket.WriteInt(0);
* oPacket.WriteInt(MyChar[i].skillinfo[j].SkillGroup);
* oPacket.WriteInt(MyChar[i].skillinfo[j].SkilliD);
* }
*
* oPacket.WriteInt(1);
* oPacket.WriteInt(0);
* }
* /*
* oPacket.WriteInt(0); // ??
* oPacket.WriteInt(LoginUID);
*
* oPacket.WriteInt(MyChar.Length);
* for (int i = 0; i < MyChar.Length; i++)
* {
* oPacket.WriteByte((byte)i); // 캐릭터 번호
* oPacket.WriteByte(0); // ???
* oPacket.WriteInt(); // ???
* }
*
* oPacket.WriteInt(MyChar.Length);
* for (int i = 0; i < MyChar.Length; i++)
* {
* oPacket.WriteByte((byte)MyChar[i].CharType);
* oPacket.WriteByte(0);
* oPacket.WriteInt(2);
* oPacket.WriteInt(0);
*
* oPacket.WriteInt(MyChar[i].EquipSkill.Length);
* for (int j = 0; j < MyChar[i].EquipSkill.Length; j++)
* {
* oPacket.WriteInt(0);
* oPacket.WriteInt(MyChar[i].EquipSkill[j].SkillGroup);
* oPacket.WriteInt(MyChar[i].EquipSkill[j].SkillID);
* }
*
* oPacket.WriteInt(1);
* oPacket.WriteInt(0);
* }
*/
oPacket.CompressAndAssemble(cs.CRYPT_KEY, cs.CRYPT_HMAC, cs.CRYPT_PREFIX, cs.CRYPT_COUNT);
cs.Send(oPacket);
}
}
/// <summary>
/// Returns the uncompressed packet from the input data
/// </summary>
/// <param name="packetToUncompress">Packet data to be uncompressed</param>
/// <returns></returns>
public static byte[] UncompressPacket(byte[] packetToUncompress)
{
return(BytesUtil.ConcatBytes(
BytesUtil.ReadBytes(packetToUncompress, 0, 11),
ZlibStream.UncompressBuffer(BytesUtil.ReadBytes(packetToUncompress, 11, (packetToUncompress.Length - 11)))));
}
public void OnSetSkill(ClientSession cs, InPacket ip)
{
//Log.Hex("패킷", ip.ToArray());
int unknown1 = ip.ReadInt();
int LoginUID = ip.ReadInt();
int UnknownCharNum = ip.ReadInt();
for (int i = 0; i < UnknownCharNum; i++)
{
int c = ip.ReadByte(); // 캐릭터 번호
byte u1 = ip.ReadByte(); // ???
int u2 = ip.ReadInt(); // ???
LogFactory.GetLog("Main").LogInfo(" {0} / {1} / {2}", c, u1, u2);
}
int CharNum = ip.ReadInt();
for (int i = 0; i < CharNum; i++)
{
int CharType = ip.ReadByte(); // 캐릭터 번호
ip.ReadByte(); // ?
ip.ReadInt(); // ? 00 00 00 02
ip.ReadInt(); // ? 00 00 00 00
int SkillCount = ip.ReadInt();
LogFactory.GetLog("Main").LogInfo("Caracteres {0} / {1} habilidades do número", CharType, SkillCount);
int CharPos = findCharIndex(CharType); // 캐릭터가 있는 배열 위치
// 캐릭터가 있으면 동작
if (CharPos != -1)
{
Array.Resize(ref MyChar[CharPos].EquipSkill, SkillCount);
// 스킬 개수만큼 배열에 담는다
for (int j = 0; j < SkillCount; j++)
{
ip.ReadInt(); // ? 00 00 00 00
int SkillGruop = ip.ReadInt(); // 아마도 스킬 그룹일 가능성 높음.
int SkillID = ip.ReadInt();
MyChar[CharPos].EquipSkill[j].SkillGroup = SkillGruop;
MyChar[CharPos].EquipSkill[j].SkillID = SkillID;
}
}
ip.ReadInt(); // 00 00 00 01
ip.ReadInt(); // 00 00 00 00
}
// 패킷은 똑같이 보내면 된다.
using (OutPacket oPacket = new OutPacket(GameOpcodes.EVENT_SET_SKILL_BROAD))
{
oPacket.WriteInt(0);
byte[] data = ip.ToArray();
data = BytesUtil.ReadBytes(data, 4, data.Length - 4);
oPacket.WriteBytes(data);
/*
* oPacket.WriteInt(0); // ??
* oPacket.WriteInt(LoginUID);
*
* oPacket.WriteInt(MyChar.Length);
* for (int i = 0; i < MyChar.Length; i++)
* {
* oPacket.WriteByte((byte)i); // 캐릭터 번호
* oPacket.WriteByte(0); // ???
* oPacket.WriteInt(); // ???
* }
*
* oPacket.WriteInt(MyChar.Length);
* for (int i = 0; i < MyChar.Length; i++)
* {
* oPacket.WriteByte((byte)MyChar[i].CharType);
* oPacket.WriteByte(0);
* oPacket.WriteInt(2);
* oPacket.WriteInt(0);
*
* oPacket.WriteInt(MyChar[i].EquipSkill.Length);
* for (int j = 0; j < MyChar[i].EquipSkill.Length; j++)
* {
* oPacket.WriteInt(0);
* oPacket.WriteInt(MyChar[i].EquipSkill[j].SkillGroup);
* oPacket.WriteInt(MyChar[i].EquipSkill[j].SkillID);
* }
*
* oPacket.WriteInt(1);
* oPacket.WriteInt(0);
* }
*/
oPacket.CompressAndAssemble(cs.CRYPT_KEY, cs.CRYPT_HMAC, cs.CRYPT_PREFIX, cs.CRYPT_COUNT);
cs.Send(oPacket);
}
}
