converting asm(hex) into a char array '\xXX'

[TheTempest]

Hey,

I am writing some shellcode to exploit a service running on my machine. My goal is to spawn a shell, with system privlieges, and start a telnet service via commandline.

I have the C++/ASM code to acomplish this, my question is how to take the pertianit ASM code and convert it into a char array in C++.

IE:
0e 05 0a ff....blah blah blah

into:

char payload[] = "\x0e\x05\x0a\xff";

My ASM code comes from MSVC++'s debugger...

Thanks for any input

[SirDice]

You are writing shellcode and you don't know how to convert a bunch of bytes to a char array?

How come you know how to write something as complex as shellcode but have no idea how to do this?

Oh oh.

[TheTempest]

hey,

sorry for my unclear question. I know how to convert hex bytes into a char array, i was just wanting to hear other peoples ideas

char *hexArray = new char[32768];
char *outputArray = new char[3*strlen(hexArray)];
memset(&hexArray,'\x00',strlen(hexArray));
long int iPos = 0;

for(int i = 0; i < strlen(hexArray);i++)
{
       outputArray[iPos] =  '\\';
       iPos++;
       outputArray[iPos] =  'x';
       iPos++;
       outputArray[iPos] =  hexArray[i]l
       iPos++;
}

delete []hexArray;
delete []outputArray;

[zvax]

come cool shell coding tute,
it converts decimal to asm to hex so um i think gdb can convert back, if i find out a shell code ot do it ill post it for u,
right now i just reading have **** to do but ill work on a asm to hex and asm to decimal convertor maybe even a hex to dic :P
cheers