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Improve collapsable code to be reusable

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maik
2024-12-30 18:08:57 +01:00
parent 7481185e14
commit fc16fb4046
24 changed files with 375 additions and 377 deletions
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content/writeups/google-ctf/2021/beginners-quest/3.md
+53 -53
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@@ -58,9 +58,9 @@ Upon opening the website, we're greeted with a code editor and some text:
>
> The controlCar function takes a single parameter – `scanArray` – which is an array containing 17 integers denoting distance > from your car to the nearest obstacle:
>
> - [indexes 0-7]: on the left side of the car (index 7 is the measurement at the left headlight),
> - [index 8]: at the center of the car,
> - [indexes 9-16]: on the right side of the car (index 9 is the measurement at the right headlight).
> - [indexes 0-7]: on the left side of the car (index 7 is the measurement at the left headlight),
> - [index 8]: at the center of the car,
> - [indexes 9-16]: on the right side of the car (index 9 is the measurement at the right headlight).
>
> See also [this image]({{< ref "#radar-image" >}}) (it's not precise, but will give you an idea what you are looking at).
>
@@ -72,9 +72,9 @@ Upon opening the website, we're greeted with a code editor and some text:
>
> The `controlCar` must return an integer denoting where the car should drive:
>
> - -1 (or any other negative value): drive more to the left,
> - 0: continue straight / straighten up the car,
> - 1 (or any other positive value): drive more to the right.
> - -1 (or any other negative value): drive more to the left,
> - 0: continue straight / straighten up the car,
> - 1 (or any other positive value): drive more to the right.
When opening the source, we also find the following comment:
@@ -92,66 +92,66 @@ When opening the source, we also find the following comment:
To solve this challenge, I came up with the following script:
{{< code language="js" title="solve.js" >}}
{{< collapsible-block badge="js" title="solve.js" >}}
```js
function controlCar(scanArray) {
if (!window.has_reset_game) {
window.has_reset_game = true;
window.car_position = 0;
window.queue = [];
}
if (window.queue.length === 0) {
let left, center, right;
if (window.car_position === -1) {
left = 8;
center = 12;
right = 15;
} else if (window.car_position === 0) {
left = 4;
center = 8;
right = 12;
} else if (window.car_position === 1) {
left = 1;
center = 4;
right = 8;
if (!window.has_reset_game) {
window.has_reset_game = true;
window.car_position = 0;
window.queue = [];
}
left = scanArray[left];
center = scanArray[center];
right = scanArray[right];
if (window.queue.length === 0) {
let left, center, right;
let furthest = Math.max(left, center, right);
let closest = Math.min(left, center, right);
if (window.car_position === -1) {
left = 8;
center = 12;
right = 15;
} else if (window.car_position === 0) {
left = 4;
center = 8;
right = 12;
} else if (window.car_position === 1) {
left = 1;
center = 4;
right = 8;
}
console.log(left, center, right);
left = scanArray[left];
center = scanArray[center];
right = scanArray[right];
let moveInDirection = (direction) => {
console.log("Going in direction", direction);
if (direction === window.car_position) {
window.queue.push(0);
} else if (direction > window.car_position) {
window.queue.push(1, 1, 1, 1);
window.car_position += 1;
} else if (direction < window.car_position) {
window.queue.push(-1, -1, -1, -1);
window.car_position -= 1;
}
};
let furthest = Math.max(left, center, right);
let closest = Math.min(left, center, right);
if (closest < 0) moveInDirection(window.car_position);
else if (furthest === left) moveInDirection(-1);
else if (furthest === center) moveInDirection(0);
else if (furthest === right) moveInDirection(1);
}
console.log(left, center, right);
return window.queue.pop();
let moveInDirection = (direction) => {
console.log("Going in direction", direction);
if (direction === window.car_position) {
window.queue.push(0);
} else if (direction > window.car_position) {
window.queue.push(1, 1, 1, 1);
window.car_position += 1;
} else if (direction < window.car_position) {
window.queue.push(-1, -1, -1, -1);
window.car_position -= 1;
}
};
if (closest < 0) moveInDirection(window.car_position);
else if (furthest === left) moveInDirection(-1);
else if (furthest === center) moveInDirection(0);
else if (furthest === right) moveInDirection(1);
}
return window.queue.pop();
}
```
{{< /code >}}
{{< /collapsible-block >}}
It starts off by initializing some global variables if the game is running for the first time (or after a restart). After which, it check if there are still moves in the queue. If so, it grabs the last item out of the queue and returns it.
content/writeups/google-ctf/2021/beginners-quest/4.md
+4 -4
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@@ -43,7 +43,7 @@ You’re taking a stroll in the lab, when Dr. Klostermann is calling your name:
[attachment.zip](/files/writeups/google-ctf/2021/beginners-quest/4/attachment.zip)
{{< code language="c" title="chal.c" isCollapsed="true" >}}
{{< collapsible-block badge="c" title="chal.c" isCollapsed="true" >}}
```c
#include <stdbool.h>
@@ -208,7 +208,7 @@ int main(void)
}
```
{{< /code >}}
{{< /collapsible-block >}}
## Recon
@@ -308,7 +308,7 @@ for set_mask, clr_mask in zip(set_masks, clr_masks):
print(flag.strip())
```
{{< code language="py" title="Full code" isCollapsed="true" >}}
{{< collapsible-block badge="py" title="Full code" isCollapsed="true" >}}
```py
set_mask_str = "gpio_set_mask"
@@ -343,7 +343,7 @@ for set_mask, clr_mask in zip(set_masks, clr_masks):
print(flag.strip())
```
{{< /code >}}
{{< /collapsible-block >}}
## Solution
content/writeups/google-ctf/2021/beginners-quest/5.md
+6 -6
View File
@@ -50,7 +50,7 @@ As you and Gökhan are leaving the crates to enter a car, you spot the tough guy
[attachment.zip](/files/writeups/google-ctf/2021/beginners-quest/5/attachment.zip)
{{< code language="py" title="RoboCaller1337.py" isCollapsed="true" >}}
{{< collapsible-block badge="py" title="RoboCaller1337.py" isCollapsed="true" >}}
```py
import random
@@ -103,9 +103,9 @@ if __name__ == "__main__":
main()
```
{{< /code >}}
{{< /collapsible-block >}}
{{< code language="txt" title="robo_numbers_list.txt" isCollapsed="true" >}}
{{< collapsible-block badge="txt" title="robo_numbers_list.txt" isCollapsed="true" >}}
```txt
263-170-6234
@@ -734,7 +734,7 @@ if __name__ == "__main__":
446-996-9104
```
{{< /code >}}
{{< /collapsible-block >}}
## Recon
@@ -793,7 +793,7 @@ for a,b in zip(key, secret):
print(flag)
```
{{< code language="py" title="Full code" isCollapsed="true" >}}
{{< collapsible-block badge="py" title="Full code" isCollapsed="true" >}}
```py
from mt19937predictor import MT19937Predictor
@@ -816,7 +816,7 @@ for a,b in zip(key, secret):
print(flag)
```
{{< /code >}}
{{< /collapsible-block >}}
## Solution
content/writeups/google-ctf/2021/beginners-quest/6.md
+37 -37
View File
@@ -50,7 +50,7 @@ After having climbed through the window, you wait for a while on the ground. The
[attachment.zip](/files/writeups/google-ctf/2021/beginners-quest/6/attachment.zip)
{{< code language="txt" title="encodings" isCollapsed="true" >}}
{{< collapsible-block badge="txt" title="encodings" isCollapsed="true" >}}
```text
I made a super secret encoder. I remember using:
@@ -64,15 +64,15 @@ I made a super secret encoder. I remember using:
I also use gzip and zlib (to compress the stuff) and I like hiding things in files...
```
{{< /code >}}
{{< /collapsible-block >}}
{{< code language="txt" title="chall.txt" isCollapsed="true" >}}
{{< collapsible-block badge="txt" title="chall.txt" isCollapsed="true" >}}
```txt
File is too large to display here.
```
{{< /code >}}
{{< /collapsible-block >}}
## Recon
@@ -336,7 +336,7 @@ for line in data:
print(line)
```
{{< code language="text" title="output" >}}
{{< collapsible-block badge="text" title="output" >}}
```text
nyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyya~
@@ -776,7 +776,7 @@ nyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyya~
nyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyya~
```
{{< /code >}}
{{< /collapsible-block >}}
### nya~
@@ -841,43 +841,43 @@ Then, let's follow the steps to convert brainfuck to Unary in reverse.
1. Remove the leading `1`
```py
unary_code = unary_code[1:]
```
```py
unary_code = unary_code[1:]
```
2. Replace unary with brainfuck
```py
for i in range(0, len(unary_code), 3):
operation = unary_code[i:i+3]
```py
for i in range(0, len(unary_code), 3):
operation = unary_code[i:i+3]
if operation == "000":
brainfuck_code += ">"
elif operation == "001":
brainfuck_code += "<"
elif operation == "010":
brainfuck_code += "+"
elif operation == "011":
brainfuck_code += "-"
elif operation == "100":
brainfuck_code += "."
elif operation == "101":
brainfuck_code += ","
elif operation == "110":
brainfuck_code += "["
elif operation == "111":
brainfuck_code += "]"
```
if operation == "000":
brainfuck_code += ">"
elif operation == "001":
brainfuck_code += "<"
elif operation == "010":
brainfuck_code += "+"
elif operation == "011":
brainfuck_code += "-"
elif operation == "100":
brainfuck_code += "."
elif operation == "101":
brainfuck_code += ","
elif operation == "110":
brainfuck_code += "["
elif operation == "111":
brainfuck_code += "]"
```
3. Print the result:
```py
print(brainfuck_code)
```
```py
print(brainfuck_code)
```
```bf
[-]>[-]<++++++[>++++++++++<-]>+++++++.<+[>++++++++++<-]>+++++++.<+[>----------<-]>----.<+++++[>++++++++++<-]>+++.<+[>----------<-]>-.<[>----------<-]>----.<+++++[>----------<-]>-------.<[>++++++++++<-]>+.<++++++[>++++++++++<-]>+++.<++++++[>----------<-]>----.<++++[>++++++++++<-]>++++.<+[>++++++++++<-]>+++++.<++++++[>----------<-]>--.<++++[>++++++++++<-]>+++++++.<+[>++++++++++<-]>++++.<++++++[>----------<-]>-.<[>++++++++++<-]>++++.<++++++[>++++++++++<-]>++.<+[>++++++++++<-]>+.<
```
```bf
[-]>[-]<++++++[>++++++++++<-]>+++++++.<+[>++++++++++<-]>+++++++.<+[>----------<-]>----.<+++++[>++++++++++<-]>+++.<+[>----------<-]>-.<[>----------<-]>----.<+++++[>----------<-]>-------.<[>++++++++++<-]>+.<++++++[>++++++++++<-]>+++.<++++++[>----------<-]>----.<++++[>++++++++++<-]>++++.<+[>++++++++++<-]>+++++.<++++++[>----------<-]>--.<++++[>++++++++++<-]>+++++++.<+[>++++++++++<-]>++++.<++++++[>----------<-]>-.<[>++++++++++<-]>++++.<++++++[>++++++++++<-]>++.<+[>++++++++++<-]>+.<
```
### Brainfuck
@@ -903,7 +903,7 @@ CTF{pl34s3_n0_m04r}
As for most ctf problems, I've written a script that executes all the step automatically and returns the flag.
{{< code language="py" title="solve.py" isCollapsed="true" >}}
{{< collapsible-block badge="py" title="solve.py" isCollapsed="true" >}}
```py
# pip install brainfuck-interpreter
@@ -1065,7 +1065,7 @@ flag = brainfuck.evaluate(brainfuck_code)
print(flag)
```
{{< /code >}}
{{< /collapsible-block >}}
## Solution
content/writeups/google-ctf/2021/beginners-quest/7.md
+2 -2
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@@ -42,7 +42,7 @@ Nowak is very impressed by your skills. You and him sit down by a table, and you
[attachment.zip](/files/writeups/google-ctf/2021/beginners-quest/7/attachment.zip)
{{< code language="python" title="chall.py" isCollapsed="true" >}}
{{< collapsible-block badge="python" title="chall.py" isCollapsed="true" >}}
```py
from Crypto.Util.number import *
@@ -63,7 +63,7 @@ print(n)
#21034814455172467787319632067588541051616978031477984909593707891829600195022041640200088624987623056713604514239406145871910044808006741636513624835862657042742260288941962019533183418661144639940608960169440421588092324928046033370735375447302576018460809597788053566456538713152022888984084306297869362373871810139948930387868426850576062496427583397660227337178607544043400076287217521751017970956067448273578322298078706011759257235310210160153287198740097954054080553667336498134630979908988858940173520975701311654172499116958019179004876438417238730801165613806576140914402525031242813240005791376093215124477
```
{{< /code >}}
{{< /collapsible-block >}}
## Recon