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mostly finished second part

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Daniel Bulant 2024-02-11 22:34:53 +01:00
parent 5b7efdc144
commit 0809619ade
2 changed files with 75 additions and 23 deletions
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7
buffer-overflow/src/project.meta
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@ -21,11 +21,10 @@
"resolutionScale": 1,
"colorSpace": "srgb",
"exporter": {
"name": "@motion-canvas/core/image-sequence",
"name": "@motion-canvas/ffmpeg",
"options": {
"fileType": "image/png",
"quality": 100,
"groupByScene": false
"fastStart": true,
"includeAudio": true
}
}
}

91
buffer-overflow/src/scenes/overwriting-locals.tsx
View file

@ -1,6 +1,6 @@
import {Circle, Layout, Node, Ray, Rect, Txt, makeScene2D} from '@motion-canvas/2d';
import { CodeBlock, remove, insert, edit, lines } from '@motion-canvas/2d/lib/components/CodeBlock';
import {DEFAULT, Reference, all, beginSlide, createRef, createSignal} from '@motion-canvas/core';
import {DEFAULT, Reference, all, beginSlide, createRef, createSignal, delay, makeRef} from '@motion-canvas/core';
const BACKGROUND = '#282C34';
const RED = '#E06C75';
@ -224,6 +224,7 @@ export default makeScene2D(function* (view) {
const rect = createRef<Rect>();
const rbpRect = createRef<Rect>();
const padRect = createRef<Rect>();
const local_cRect = createRef<Rect>();
const local_30Rect = createRef<Rect>();
@ -254,6 +255,14 @@ export default makeScene2D(function* (view) {
>
<Txt width={500} textAlign={'center'} fill={BLACK} text="RBP" fontFamily={'monospace'} />
</Rect>
<Rect
ref={padRect}
height={150}
width={500}
stroke={GRAY}
lineWidth={4}
grow={2}
/>
<Rect
ref={local_cRect}
height={100}
@ -282,20 +291,14 @@ export default makeScene2D(function* (view) {
</Rect>
);
yield* all(
code().selection(DEFAULT, .5),
code().x(-code().width() / 2, 1),
rect().opacity(1, .5),
rect().x(rect().width() / 2 + 150, 1)
);
const writeArrow = createRef<Ray>();
const metaInfo = createRef<Node>();
const texts: Reference<Txt>[] = [];
view.add(<Node ref={metaInfo} opacity={0}>
<Ray
ref={writeArrow}
fromX={rect().x() - rect().width() / 2 - 50}
toX={rect().x() - rect().width() / 2 - 50}
fromX={() => rect().x() - rect().width() / 2 - 50}
toX={() => rect().x() - rect().width() / 2 - 50}
endArrow
lineWidth={4}
stroke={GRAY}
@ -303,22 +306,72 @@ export default makeScene2D(function* (view) {
toY={local_30Rect().y() + local_30Rect().height() / 2}
lineDash={[10, 10]}
/>
<Txt topLeft={() => rbpRect().topRight().addX(rect().x() + 16)} text="RBP" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt left={() => rbpRect().right().addX(rect().x() + 16)} text="8" fill={GRAY} fontSize={36} />
<Txt left={() => rbpRect().bottomRight().addX(rect().x() + 16)} text="RBP - 0x8" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt left={() => local_cRect().right().addX(rect().x() + 16)} text="4" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt left={() => local_cRect().bottomRight().addX(rect().x() + 16)} text="RBP - 0xC" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt left={() => local_30Rect().right().addX(rect().x() + 16)} text="44" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt bottomLeft={() => local_30Rect().bottomRight().addX(rect().x() + 16)} text={"RSP\n= RBP - 0x38"} fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 0)} topLeft={() => rbpRect().topRight().addX(rect().x() + 16)} text="RBP + 0x8" fill={GRAY} fontSize={36} />
<Txt ref={makeRef(texts, 0+1)} left={() => rbpRect().right().addX(rect().x() + 16)} text="8" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 0+2)} left={() => padRect().topRight().addX(rect().x() + 16)} text="RBP" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 1+2)} left={() => padRect().right().addX(rect().x() + 16)} text="8" fill={GRAY} fontSize={36} />
<Txt ref={makeRef(texts, 2+2)} left={() => padRect().bottomRight().addX(rect().x() + 16)} text="RBP - 0x8" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 3+2)} left={() => local_cRect().right().addX(rect().x() + 16)} text="4" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 4+2)} left={() => local_cRect().bottomRight().addX(rect().x() + 16)} text="RBP - 0xC" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 5+2)} left={() => local_30Rect().right().addX(rect().x() + 16)} text="44" fill={GRAY} fontFamily={'monospace'} fontSize={36} />
<Txt ref={makeRef(texts, 6+2)} bottomLeft={() => local_30Rect().bottomRight().addX(rect().x() + 16)} text={"RSP\n= RBP - 0x38"} fill={GRAY} fontFamily={'monospace'} fontSize={36} />
</Node>)
let writeArrowTo = writeArrow().to();
writeArrowTo.y = local_30Rect().y() - local_30Rect().height() / 2;
yield* all(
metaInfo().opacity(1, 1),
writeArrow().to(writeArrowTo, 1)
writeArrow().to(() => {
writeArrowTo.y = local_30Rect().y() - local_30Rect().height() / 2;
writeArrowTo.x = rect().x() - rect().width() / 2 - 50;
return writeArrowTo;
}, 1),
code().selection(DEFAULT, .5),
code().x(-code().width() / 2, 1),
rect().opacity(1, .5),
rect().x(rect().width() / 2 + 150, 1)
);
yield* beginSlide('Memory visualization');
code().language('shell');
code().code(
`$ python3 -c "print('A' * 43)" | ./main
Enter your name:
Welcome AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!`
);
yield* beginSlide('Shell part1');
yield* all(
writeArrow().to(() => {
writeArrowTo.y = local_30Rect().y() - local_30Rect().height() / 2 - 50;
return writeArrowTo;
}, 1),
delay(.5, writeArrow().stroke(RED, 1)),
code().edit(1.5, false)`
$ python3 -c "print('A' * ${edit("43", "44")})" | ./main
Enter your name:
Welcome AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA${insert("A")}!${insert("\nYou win!")}`
);
yield* beginSlide('Shell part2');
yield* all(
writeArrow().to(() => {
writeArrowTo.y = local_30Rect().y() - local_30Rect().height() / 2 - 300;
return writeArrowTo;
}, 1),
delay(.5, writeArrow().stroke(RED, 1)),
code().edit(1.5, false)`
$ python3 -c "print('A' * ${edit("44", "56")})" | ./main
Enter your name:
Welcome AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA${insert("...")}!
You win!${insert(`fish: Process 50623, './main' from job 1,
'python3 -c "print('A' * 56)" | …'
terminated by signal SIGSEGV (Address boundary error)`)}`
);
yield* beginSlide("Shell part3");
});