This is the code i have in c# (translate of the trollface's C++ code thanks to him)
but there is a big probleme with my code i've replace char by byte witch is equivalent in the most of case but not in this case... In fact byte = 1 byte( \o/) and it's seems that in c++ char is 4byte:
how can i change this code in order to make it work?
Thanks in advance.
Code:
public static string DecryptGamePacket(int session_id, byte[] str, int length)
{
string encrypted_string = "";
int session_key = session_id & Convert.ToChar(0xFF);
long session_number = Convert.ToChar(session_id >> 6);//Comprendre ca
session_number &= Convert.ToChar(0xFF);
session_number &= Convert.ToInt64(0x80000003);//Comprendre ca
switch (session_number)
{
case 0:
for (int i = 0; i < length; i++)
{
int firstbyte = Convert.ToChar(Convert.ToChar(session_key) + Convert.ToChar(0x40));
int highbyte = Convert.ToInt32(Convert.ToInt32(str[i]) - Convert.ToInt32(firstbyte));
encrypted_string += highbyte;
}
break;
case 1:
for (int i = 0; i < length; i++)
{
char firstbyte = Convert.ToChar(session_key + 0x40);
int highbyte = Convert.ToInt32((int)str[i] + (int)firstbyte);
encrypted_string += highbyte;
}
break;
case 2:
for (int i = 0; i < length; i++)
{
char firstbyte = Convert.ToChar(session_key + 0x40);
int highbyte = Convert.ToInt32((int)str[i] - (int)firstbyte ^ 0xC3);
encrypted_string += highbyte;
}
break;
case 3:
for (int i = 0; i < length; i++)
{
char firstbyte = Convert.ToChar(session_key + 0x40);
int highbyte = Convert.ToInt32((int)str[i] + firstbyte ^ 0xC3);
encrypted_string += highbyte;
}
break;
default:
encrypted_string += 0xF;
break;
}
List<string> temp = new List<string>(encrypted_string.Split(Function.getextendedascii(0xFF)[0]));
string save = "";
for (int i = 0; i < temp.Count; i++)
{
save += DecryptGamePacket2(Function.ToByte(temp[i]));
save += 0xFF;
}
return save;
} public static string DecryptGamePacket2(byte[] str)
{
string decrypted_string="";
char[] table = {' ','-','.','0','1','2','3','4','5','6','7','8','9','n'};
int count = 0;
byte len;
byte highbyte;
byte lowbyte;
int str_length = Function.strlen(str);
for (count = 0; count < str_length; )
{
if (str[count] <= 0x7A)
{
len = str[count];
for (int i = 0; i < (int)len; i++)
{
count++;
decrypted_string += Convert.ToChar((int)str[(int)count] ^ (int)0xFF);
}
count++;
} else
{
len = str[count];
len &= 0x7F;
for (int i = 0; i < (int)len;)
{
count++;
highbyte = str[count];
highbyte &= 0xF0;
highbyte >>= 0x4;
lowbyte = str[count];
lowbyte &= 0x0F;
if (highbyte != 0x0 && highbyte != 0xF)
{
decrypted_string += table[highbyte-1];
i++;
}
if (lowbyte != 0x0 && lowbyte != 0xF)
{
decrypted_string += table[lowbyte-1];
i++;
}
}
count++;
}
}
return decrypted_string;
}
