[RELEASE] Packet Encryption/Decryption Algorithm

[suiluJ.]

Hey,

Maybe it's useful for someone here, these are the current algorithms for encrypting / decrypting the Packets.

Encrypt:

void Packet::Encrypt()
{
    if(this->size > 4)
    {
	int  a = 4;
	BYTE b;

	int i;
        for (i = 0; i < (this->size - 4) / 3 - 1; i++)
        {
			b		            = this->data[a];
			this->data[a]	    = this->data[a + 3];
			this->data[a + 3]   = b;
			this->data[a]	   ^= 4;
			this->data[a + 1]  ^= 4;
			this->data[a + 2]  ^= 4;
			a				   += 3;
        }
     }
}

Decrypt:

void Packet::Decrypt()
{
    if (this->size > 4)
    {
        int  a = 4 + 3 * ((this->size - 4) / 3 - 1);
	BYTE b;

	int i;
        for (i = 0; i < (this->size - 4) / 3 - 1; i++)
        {
			b		            = this->data[a];
			this->data[a]	    = this->data[a - 3];
			this->data[a - 3]   = b;
			this->data[a]	   ^= 4;
			this->data[a - 1]  ^= 4;
			this->data[a - 2]  ^= 4;
			a				   -= 3;
        }
    }
}

[Mi4uric3]

Da ist die Encryption-Routine für die control.ini ja komplizierter..

[nico_w]

They don't use any keys? :O

[suiluJ.]

Originally Posted by nico_w

They don't use any keys? :O

no, they don't.

But some packets are multiple packets in one (these packets are compressed).

[gebo93]

How to use it ? Im newbie

[Mi4uric3]

Originally Posted by gebo93

How to use it ? Im newbie

Its not useful for you then.