pacmanTTY.c

pacmanTTY.c

#include <sys/types.h>
#include <sys/ptrace.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <openssl/aes.h>

#define MAXIMUMWIDTH 80
#define MAXIMUMHEIGHT 20

int map[MAXIMUMWIDTH][MAXIMUMHEIGHT];

const unsigned char *key = ".:|:. Cisco .:|:.";
//const unsigned char *ciphertext = "flag{@....}";
const unsigned char ciphertext[] = {0x67, 0xba, 0x97, 0x2d, 0x44, 0xfa, 0xdd, 0x45, 0xa1, 0xba, 0x4b, 0x4f, 0x48, 0x60, 0xe2, 0x0e, 0x00};

void handlesegv(int signalid, siginfo_t *signalinfo, void *unused) {
	if (signalid == SIGINT) {
		return;
	} else {
		printf("E: b00p. overflow detected.\n");
		exit(EXIT_FAILURE);
	}
}

void draw(int x, int y) {
	int rowcounter;
	int columncounter;
	for (rowcounter = 0; rowcounter < MAXIMUMHEIGHT; rowcounter ++) {
		for (columncounter = 0; columncounter < MAXIMUMWIDTH; columncounter ++) {
			if ((columncounter == x) && (rowcounter == y)) {
				printf("@");
			} else {
				if (map[columncounter][rowcounter] == 0) {
					printf(" ");
				} else {
					printf(".");
				}
			}
		}
		printf("\n");
	}
}

int main (int argc, char **argv) {
	struct sigaction signalaction;
	int rowcounter;
	int columncounter;
	int gametimer;
	int x;
	int y;
	char inputbuffer[2];
	int inputcounter;
	int dotcounter;
	unsigned char outputbuffer[1024];
	int outputcounter;
	AES_KEY aeskey;
	unsigned char outputbuffer2[1024];
	// handle attempts to ptrace()
	//ptrace(PT_TRACE_ME, 0, NULL, NULL);
        // eat all the harmful signals
	//signalaction.sa_flags = SA_SIGINFO;
	//sigemptyset(&signalaction.sa_mask);
	//signalaction.sa_sigaction = handlesegv;
	//sigaction(SIGSEGV, &signalaction, NULL);
	//sigaction(SIGBUS, &signalaction, NULL);
	//sigaction(SIGINT, &signalaction, NULL);
	for (rowcounter = 0; rowcounter < MAXIMUMHEIGHT; rowcounter ++) {
		for (columncounter = 0; columncounter < MAXIMUMWIDTH; columncounter ++) {
			map[columncounter][rowcounter] = 1;
		}
	}
	dotcounter = (MAXIMUMWIDTH * MAXIMUMHEIGHT);
	gametimer = (rand() % (MAXIMUMHEIGHT * MAXIMUMWIDTH)) + 500;
	x = rand() % MAXIMUMWIDTH;
	y = rand() % MAXIMUMHEIGHT;
	x = 0;
	y = 0;
	while ((gametimer > 0) && (dotcounter != 0)) {
		if (map[x][y] == 1) {
			map[x][y] = 0;
			dotcounter --;
		}
		system("clear");
		draw(x, y);
		inputcounter = read(0, inputbuffer, 1);
		switch(inputbuffer[0]) {
			case 'h':
				x --;
				break;
			case 'j':
				y ++;
				break;
			case 'k':
				y --;
				break;
			case 'l':
				x ++;
				break;
			// vi style quit
			//case ':':
			//	inputcounter = read(0, inputbuffer, 1);
			//	switch(inputbuffer[0]) {
			//		case 'q':
			//			exit(EXIT_SUCCESS);
			//			break;
			//	}
			//	break;
		}
		gametimer --;
		sleep(1);
	}
	if (dotcounter == 0) {
		printf("complete!\n");
		if (gametimer > 450) {
			//AES_set_encrypt_key(key, 128, &aeskey);
			//AES_encrypt(ciphertext, outputbuffer, &aeskey);
			//for (outputcounter = 0; *(outputbuffer + outputcounter) != 0x00; outputcounter ++) {
        		//	printf("%X ", *(outputbuffer + outputcounter));
			//}
			AES_set_decrypt_key(key, 128, &aeskey);
			//AES_decrypt(outputbuffer, outputbuffer2, &aeskey);
			AES_decrypt(ciphertext, outputbuffer2, &aeskey);
			printf("%s\n", outputbuffer2);
		}
	}
}