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#include <stdio.h> #include <string.h> #include <fcntl.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #include <stdint.h>
void linux_setting(); void try_gdb(); void endianness(); uint64_t substack(); void stack();
int data_int[] = {0xd25f2f67, 0xaad200ad, 0xa505c8ac, 0x6d295f2, 0x5c1e76d2, 0x426cba27, 0x38363bb2, 0xd930942f, 0x3b4fe71c, 0x23b0eaae}; char data_chr[] = "Wubba Lubba Dub Dub!"; void * data_pointer[] = {printf, puts, scanf, linux_setting, try_gdb, endianness, substack, stack}; char shellcode[0x50];
void linux_setting(){
puts("As you see this, I'm sure you run this program on Linux/WSL!"); }
void try_gdb(){
uint64_t rip; srand(time(0)); int randnum = rand(), guessnum; puts("Guess the number ?"); asm volatile("1: lea 1b(%%rip), %0;": "=a"(rip)); printf("Current IP = 0x%lx\n", rip); scanf("%d", &guessnum); if(guessnum == randnum){ puts("Wow...You are correct."); } else{ puts("Seems that you got wrong!"); exit(0); } }
void endianness(){
uint64_t a; uint32_t b = 0xdeadbeef; uint16_t c = 0xface; uint8_t d[2] = {0xae, 0xaf}; * (uint8_t *)&a = d[0]; * (uint16_t *)((uint8_t *)&a + 1) = c; * (uint32_t *)((uint8_t *)&a + 3) = b; * (uint8_t *)( (uint8_t *)&a + 7) = d[1]; char ans[8]; for(int i = 0; i < 8 ; i++){ int p; scanf("%d", &p); ans[i] = p & 0xff; } if(* (uint64_t *)ans == a){ puts("pass!"); } else puts("try again"); }
uint64_t substack(){ uint64_t varies3 = 0xdeadbeefadcaffee; return (uint64_t)&varies3; }
void stack(){
char varies0[8] = "ABCDEFGH"; int varies1 = 0x12345678; int varies2 = 0x90abcdef; register int* a = &varies1; register int* b = &varies2; register int count = 0; register uint64_t end = substack(); printf("%08lx\n", (uint64_t)stack); printf("%08lx\n", (uint64_t)varies0); for(register uint64_t pointer = end; pointer <= (uint64_t)varies0 ; pointer += 8){ char *s = getenv("SECURITY_DEBUG"); if(s){ printf("0x%lx : %8lx\n", pointer, *(uint64_t *)(pointer)); continue; } uint64_t input; scanf("%lu", &input); if(input != *(uint64_t *)(pointer)){ puts("Fail."); exit(0); } count ++; } puts("Congrations!"); }
int main(){
linux_setting(); try_gdb(); endianness(); stack(); return 0; }
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