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[117] IT 비전공자 [dreamhack]Double DES문제 풀기

소스코드당#!/usr/bin/env python3from Crypto.Cipher import DESimport signalimport osif __name__ == "__main__": signal.alarm(15) with open("flag", "rb") as f: flag = f.read() key = b'Dream_' + os.urandom(4) + b'Hacker' key1 = key[:8] key2 = key[8:] print("4-byte Brute-forcing is easy. But can you do it in 15 seconds?") cipher1 = DES.new(key1, DES.MODE_ECB) cipher2 = D..

[116] IT 비전공자 [dreamhack]iofile_vtable 문제 풀기

#include #include #include #include char name[8];void alarm_handler() { puts("TIME OUT"); exit(-1);}void initialize() { setvbuf(stdin, NULL, _IONBF, 0); setvbuf(stdout, NULL, _IONBF, 0); signal(SIGALRM, alarm_handler); alarm(60);}void get_shell() { system("/bin/sh");}int main(int argc, char *argv[]) { int idx = 0; int sel; initialize(); printf("what is your name:..