[OTC] Try login to server

[dramcio]

Hello.
I try to login with OTC to custom server (not cipsoft, but this server normally uses OTC).

I've found RSA key. First bytes of login package in Wireshark are the same as bytes from the original client.

Bytes are the same to this line of code (included):

msg:addU32(PIC_SIGNATURE)

After this line they are different (I think it's a cause of XTEA key)

But I have strange bug.

When I use short account number(one/two numbers) I'm getting error "account number or password is incorrect".
But when I use longer number I got "Outdated client".

I'm stuck, could you tell me where I can look for a solution?

Best Regards

 

[Olddies]

Hello.
I try to login with OTC to custom server (not cipsoft, but this server normally uses OTC).

I've found RSA key. First bytes of login package in Wireshark are the same as bytes from the original client.

Bytes are the same to this line of code (included):

msg:addU32(PIC_SIGNATURE)

After this line they are different (I think it's a cause of XTEA key)

But I have strange bug.

When I use short account number(one/two numbers) I'm getting error "account number or password is incorrect".
But when I use longer number I got "Outdated client".

I'm stuck, could you tell me where I can look for a solution?

Best Regards

You need to know the real version of the server wich is always changed not the oficial ones ej 7.72 they use for example 1.0

 

[dramcio]

Yes, I changed it.

Spoiler

msg:addU16(g_game.getProtocolVersion())

This line I think. Or there is more information about protocol version in client login packet?

Maybe with XTEA key, decrypt communication between client and server, but how to decrypt it? Could you provide some examples?