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Add Misc challenge: Invisible Maze
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@officialcjunior
officialcjunior committed Aug 15, 2020
1 parent 0989b8b commit 0294966
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5 changes: 5 additions & 0 deletions 2020/Misc/Invisible-Maze/Admin/README.md
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## Build Instructions

Install Game Boy Development Kit (GBDK) and use the following command:

`lcc -Wa-l -Wl-m -o output.gb test.c`
64 changes: 64 additions & 0 deletions 2020/Misc/Invisible-Maze/Admin/image_data.c
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/*
Tiles data
Number of Tiles : 54
*/

const unsigned char image_data[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x02,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x32,0x01,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x04,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x01,
0x00,0x00,0x00,0x00,0x00,0x00,0x15,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x18,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x55,0x00,0x92,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0x00,0x01,0x00,0x52,0x00,0x42,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x81,0x42,0x64,0x01,0xE5,0x00,0x34,0x00,0x10,0x00,0x00,0x00,0x02,0x00,0x0F,0x00,
0x21,0x10,0x3A,0x01,0xC9,0x00,0x4D,0x80,0x8B,0x00,0x00,0x00,0xAA,0x00,0xFF,0x00,
0x0C,0x20,0x64,0x00,0xCC,0x00,0x64,0x00,0x2C,0x00,0x00,0x00,0xAA,0x00,0xFF,0x00,
0x43,0x00,0x62,0x00,0x47,0x00,0x64,0x00,0x40,0x00,0x00,0x00,0xAA,0x00,0xFF,0x00,
0x80,0x00,0x00,0x80,0xC0,0x00,0x45,0x00,0x44,0x00,0x00,0x00,0xA2,0x00,0xCF,0x20,
0x00,0x00,0x00,0x00,0x00,0x00,0x55,0x00,0x92,0x00,0x00,0x00,0xAA,0x00,0xFF,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0xFF,0x00,
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0xFF,0x00,0xFF,0x00,0xBF,0x40,0xC0,0x00,0x80,0x00,0x80,0x00,0x80,0x00,0xC0,0x00,
0xFF,0x00,0xFE,0x01,0xFF,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x01,0x00,0x01,0x00,
0xEF,0x10,0xFD,0x02,0xFF,0x00,0xDC,0x20,0xFC,0x00,0xFC,0x00,0xF8,0x00,0xFC,0x00,
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0xFF,0x00,0xFF,0x00,0x7B,0x84,0xC0,0x00,0xC0,0x00,0xC0,0x00,0xC0,0x00,0xFF,0x00,
0xF8,0x00,0xF8,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,
0x1F,0x00,0x1F,0x00,0x1F,0x00,0x1B,0x04,0x1F,0x00,0x1E,0x01,0x1F,0x00,0x1F,0x00,
0x3F,0x80,0x9F,0x00,0xDF,0x00,0xBF,0x00,0xBF,0x00,0xB7,0x08,0x9F,0x00,0x3F,0x80,
0xFF,0x00,0xFF,0x00,0x8F,0x00,0x8B,0x04,0x0F,0x00,0x8F,0x00,0x8E,0x01,0x0F,0x00,
0xDE,0x01,0xDF,0x00,0xDF,0x00,0x5F,0x80,0xDF,0x00,0xD7,0x08,0xDF,0x00,0xDF,0x00,
0x80,0x00,0x80,0x00,0x00,0x80,0x00,0x80,0x80,0x00,0x7F,0x80,0xFF,0x00,0xFF,0x00,
0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0xF1,0x00,0xF0,0x00,0xF9,0x00,
0xD8,0x20,0xFC,0x00,0xFC,0x00,0xB8,0x40,0xFC,0x00,0xFC,0x00,0x78,0x80,0xFC,0x00,
0x0F,0x00,0x1F,0x00,0x0E,0x01,0x1F,0x00,0x0F,0x00,0x0B,0x04,0x03,0x00,0x01,0x00,
0xFF,0x00,0xFF,0x00,0xEF,0x10,0xC4,0x00,0xC0,0x00,0xC0,0x00,0xC0,0x00,0xC0,0x00,
0x00,0x80,0x00,0x80,0x80,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x1F,0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xBB,0x04,0x9B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x8F,0x00,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x4B,0x84,0xC3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFF,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xFC,0x00,0xF4,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0xB8,0x40,0xBC,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0xC0,0x00,
0x0E,0x01,0x0E,0x04,0x08,0x04,0x0C,0x00,0x0C,0x00,0x08,0x04,0x0E,0x04,0x0E,0x01,
0x03,0xC0,0x43,0x21,0x12,0x21,0x33,0x00,0x33,0x00,0x13,0x20,0x43,0x20,0xC3,0x80,
0xA0,0x63,0x8E,0x04,0x04,0x08,0x08,0x08,0x0F,0x0F,0x00,0x08,0x08,0x04,0x07,0x01,
0x42,0x81,0x62,0x04,0x24,0x24,0x15,0x22,0xE1,0xE0,0x00,0x00,0x24,0x00,0x60,0x83,
0x40,0x81,0x27,0x02,0x02,0x04,0x84,0x04,0xA7,0x47,0x20,0x24,0x44,0x22,0x43,0x80,
0x23,0xC0,0x33,0x01,0x13,0x10,0x13,0x10,0xFB,0xF0,0x03,0x00,0x13,0x00,0xA3,0xC0,
0x81,0x70,0x90,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,
0xF9,0xF0,0xC1,0x02,0xC2,0x02,0xC2,0x01,0xC0,0x00,0xC0,0x00,0x82,0x40,0x58,0x31,
0x20,0xC0,0x10,0x00,0x00,0x00,0xC0,0x00,0xD0,0x20,0x10,0x10,0x20,0x10,0x20,0xC0,
0x0C,0x00,0x0C,0x00,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00

};

21 changes: 21 additions & 0 deletions 2020/Misc/Invisible-Maze/Admin/image_map.c
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/*
Tiles map
TileMap Size : 20 x 18
*/

const unsigned char image_map[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
0x03, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x26, 0x27, 0x28, 0x29, 0x00, 0x2A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x35,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
185 changes: 185 additions & 0 deletions 2020/Misc/Invisible-Maze/Admin/output.c
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#include <gb/gb.h>
#include <gb/drawing.h>
#include <gb/font.h>
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include "image_data.c"
#include "image_map.c"
#define key "KRUHZ=\x03\t\x07!R\x04!0\x05\n\x05RX!\x04:!>\x05PX\x08?"

char fakeflag[49] = "flag{https://www.youtube.com/watch?v=dQw4w9WgXcQ}";

char k[30];

unsigned char backgroundcharacters[] = { 0xFF, 0x00, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F, 0x80, 0x7F,
0xFF, 0x00, 0x01, 0xFE, 0x03, 0xFC, 0x07, 0xF8, 0x0F, 0xF0, 0x1F, 0xE0, 0x3F, 0xC0, 0x7F, 0x80,
0xFF, 0x00, 0xFE, 0x01, 0xFC, 0x03, 0xF8, 0x07, 0xF0, 0x0F, 0xE0, 0x1F, 0xC0, 0x3F, 0x80, 0x7F,
0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
0xFF, 0x00, 0xFF, 0x01, 0xFD, 0x03, 0xF9, 0x07, 0xF1, 0x0F, 0xE1, 0x1F, 0xC1, 0x3F, 0x81, 0x7F,
0x80, 0x7F, 0x81, 0x7E, 0x83, 0x7C, 0x87, 0x78, 0x8F, 0x70, 0x9F, 0x60, 0xBF, 0x40, 0xFF, 0x00,
0xFF, 0x70, 0xFF, 0x98, 0xEF, 0xB8, 0xCF, 0xF8, 0xFF, 0x70, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x01,
0xFF, 0x00, 0xFE, 0x01, 0xFC, 0x03, 0xF8, 0x07, 0xF0, 0x0F, 0xE0, 0x1F, 0xC0, 0x3F, 0xFF, 0xFF
};

unsigned char spritetiles[] = { 255, 0, 255, 0, 255, 0, 255, 0 };

unsigned char bgmap[] = { 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2,
1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3
};

void printflag(UBYTE k1, UBYTE k2, int i)
{
for (i = 0; i < 29; i++)
{
k[i] = (((key[i] + k1) ^ k2));
}
k[i] = 0;
printf("Way to go! \n flg if u not noob: %s\n", k);

}

//beep sound on each movement
void beep(UBYTE counter)
{
NR50_REG = 0xFF;
NR51_REG = 0xFF;
NR52_REG = 0x80;
if (counter)
{
NR10_REG = 0x38 U;
NR11_REG = 0x70 U;
NR12_REG = 0xE0 U;
NR13_REG = 0x0A U;
NR14_REG = 0xC6 U;
NR51_REG |= 0x11;
delay(20);
}
}

void milestone_beep(UBYTE counter)
{
NR50_REG = 0xFF;
NR51_REG = 0xFF;
NR52_REG = 0x80;
if (counter)
{
NR10_REG = 0x15;
NR11_REG = 0x96;
NR12_REG = 0x73;
NR13_REG = 0xBB;
NR14_REG = 0x85;
delay(20);
}
}

void main()
{
UBYTE counter, x, y, i, k1, k2;
x = 6;
y = 8;
k1 = 0;
k2 = 0;
font_init();

set_bkg_data(0, 112, image_data);
set_bkg_tiles(0, 0, 20, 18, image_map);
SHOW_BKG;
DISPLAY_ON;
waitpad(J_START);

gotogxy(7, 88);
printf("Weclome! \n\n\n to the invisible maze \n Press Start to \n play. \n\n Place the flag \n on the right \n position to get the\n flag!");
waitpad(J_START);

disable_interrupts();
DISPLAY_OFF;

set_bkg_data(0, 4, backgroundcharacters);
for (counter = 0; counter <= 16; counter += 2)
set_bkg_tiles(0, counter, 20, 2, bgmap);

SPRITES_8x8;
set_sprite_data(0, 1, spritetiles);
set_sprite_tile(0, 0);
move_sprite(0, x, y);

SHOW_BKG;
SHOW_SPRITES;
DISPLAY_ON;
enable_interrupts();

while (1)
{
for (counter = 0; counter < 9; counter++)
{
wait_vbl_done();
}
counter = joypad();

if (counter & J_UP)
{
y--;
beep(counter);
}
if (counter & J_DOWN)
{
y++;
beep(counter);
}
if (counter & J_LEFT)
{
x--;
beep(counter);
}
if (counter & J_RIGHT)
{
x++;
beep(counter);
}

if (x == 6 && y == 8)
{
k1 = k1 + x;
k2 = k2 + y;
milestone_beep(counter);
}

if (x == 5 && y == 3)
{
k1 = k1 / x;
k2 = k2 / y;
milestone_beep(counter);
}

if (x == 12 && y == 5)
{
k1 = k1 + x;
k2 = k2 + y;
milestone_beep(counter);
}

if (x == 4 && y == 5)
{
k1 = k1 * x;
k2 = k2 * y;
milestone_beep(counter);
}

if (x == 15 && y == 10)
{
k1 = k1 - x;
k2 = k2 - y;
milestone_beep(counter);
}

if (k1 == 37 && k2 == 25)
{
printflag(k1, k2, i);
set_sprite_tile(0, 0);
break;
}

move_sprite(0, x, y);
}
}
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14 changes: 14 additions & 0 deletions 2020/Misc/Invisible-Maze/README.md
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# Invisible Maze

**Description**

Move the flag in just the right ways or just hack the game!

**Author**: [officialcjunior](https://twitter.com/cjuniorstweeets) & [k4iz3n](https://twitter.com/akulpillai)

**Short writeup**
+ Challenge is a Nintendo GameBoy ROM image.
+ Reverse the ROM and figure out the implementation
+ Analyze the calling function's checks to find the path along which we must move.

**FLAG**: `inctf{175_n0_L363nd_0F_z3ld4}`
1 change: 1 addition & 0 deletions 2020/Misc/README.md
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|S.No.| Challenge Name | Status |
|:---:|:--------------:|:-------:|
|1| [Secure Note](Secure-Note/)|Done|
|2| [Invisible Maze](Invisible-Maze/)|Done|

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