Classic [4267] client crashes after sending chat packet

Mr_PoP · 09/19/2013, 12:53

#Request Close fixed

nTL3fTy · 09/19/2013, 13:32

Receive MsgConnect (1052):

Code:

uint encryptCode = (packet.AccountId + packet.Data) ^ 0x4321;
client.Crypto.ChangeCode(packet.Data ^ encryptCode);

// send MsgTalk (1004) with NEW_ROLE or ANSWER_OK string and ChatAttribute.Entrance (2101)

ChangeCode:

Code:

public unsafe void ChangeCode(uint data)
{
    _bufEncrypt3 = new byte[KEY_LENGTH];
    _bufEncrypt4 = new byte[KEY_LENGTH];
    uint data2 = data * data;
    fixed (byte* pKey1 = _bufEncrypt1, pKey2 = _bufEncrypt2, pKey3 = _bufEncrypt3, pKey4 = _bufEncrypt4)
    {
        MSVCRT.memcpy(pKey3, pKey1, KEY_LENGTH);
        MSVCRT.memcpy(pKey4, pKey2, KEY_LENGTH);

        for (int i = 0; i < KEY_LENGTH; i += 4)
        {
            *((uint*)&pKey3[i]) ^= data;
            *((uint*)&pKey4[i]) ^= data2;
        }
    }

    _useAlternate = true;
}

Mr_PoP · 09/19/2013, 13:55

Quote:

Originally Posted by nTL3fTy

Receive MsgConnect (1052):

Code:

uint encryptCode = (packet.AccountId + packet.Data) ^ 0x4321;
client.Crypto.ChangeCode(packet.Data ^ encryptCode);

// send MsgTalk (1004) with NEW_ROLE or ANSWER_OK string and ChatAttribute.Entrance (2101)

ChangeCode:

Code:

public unsafe void ChangeCode(uint data)
{
    _bufEncrypt3 = new byte[KEY_LENGTH];
    _bufEncrypt4 = new byte[KEY_LENGTH];
    uint data2 = data * data;
    fixed (byte* pKey1 = _bufEncrypt1, pKey2 = _bufEncrypt2, pKey3 = _bufEncrypt3, pKey4 = _bufEncrypt4)
    {
        MSVCRT.memcpy(pKey3, pKey1, KEY_LENGTH);
        MSVCRT.memcpy(pKey4, pKey2, KEY_LENGTH);

        for (int i = 0; i < KEY_LENGTH; i += 4)
        {
            *((uint*)&pKey3[i]) ^= data;
            *((uint*)&pKey4[i]) ^= data2;
        }
    }

    _useAlternate = true;
}

am doing the same thing!

nTL3fTy · 09/19/2013, 14:22

Quote:

Originally Posted by Mr_PoP

am doing the same thing!

Sorry, I thought your UpdateKeys method was inaccurate but I thought through it too quickly.

Are the constants correct?

Code:

PacketType.Language = 1052
ChatType.LoginInformation = 2101

Mr_PoP · 09/19/2013, 14:36

Quote:
Originally Posted by nTL3fTy
Sorry, I thought your UpdateKeys method was inaccurate but I thought through it too quickly.

Are the constants correct?
Code:
PacketType.Language = 1052
ChatType.LoginInformation = 2101

Language = 0x41C,
LoginInformation = 0x835,

yeah!! am sure there is something wrong with the crypto tho!

EDIT: am going to do some Unit-Testes

Spirited · 09/19/2013, 16:45

Please don't remove the original question after you've received an answer.
#closed.