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start working on overwriting locals example

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Daniel Bulant 2024-02-11 19:57:40 +01:00
parent 63a3d7c618
commit 499ddadc05
3 changed files with 214 additions and 1 deletions
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3
buffer-overflow/src/project.ts
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import {makeProject} from '@motion-canvas/core';
import functionCall from './scenes/function-run?scene';
import overwritingLocals from './scenes/overwriting-locals?scene';
export default makeProject({
scenes: [functionCall],
scenes: [functionCall, overwritingLocals],
});

5
buffer-overflow/src/scenes/overwriting-locals.meta Normal file
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{
"version": 0,
"timeEvents": [],
"seed": 756399355
}

207
buffer-overflow/src/scenes/overwriting-locals.tsx Normal file
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import {Circle, Layout, Ray, Rect, Txt, makeScene2D} from '@motion-canvas/2d';
import { CodeBlock, remove, insert, edit } from '@motion-canvas/2d/lib/components/CodeBlock';
import {Reference, all, beginSlide, createRef, createSignal} from '@motion-canvas/core';
const BACKGROUND = '#282C34';
const RED = '#E06C75';
const GREEN = '#98C379';
const YELLOW = '#E5C07B';
const BLUE = '#61AFEF';
const MAGENTA = '#C678DD';
const CYAN = '#56B6C2';
const GRAY = '#ABB2BF';
const WHITE = '#FFFFFF';
const BLACK = '#000000';
export default makeScene2D(function* (view) {
const code = createRef<CodeBlock>();
yield view.add(
<CodeBlock
ref={code}
language='c'
code={`
#include <stdio.h>
#include <stdlib.h>
int main(void) {
char local_30[32];
int local_c = 0xdeadbeef;
printf("Enter your name: ");
gets(local_30);
printf("Welcome %s!\\n", local_30);
if(local_c != 0xdeadbeef) {
printf("You win!\\n");
}
return 0;
}
`}
fontSize={30}
/>);
yield* beginSlide('C code');
view.removeChildren();
yield view.add(
<CodeBlock
ref={code}
language='asm'
code={`
main:
PUSH RBP
MOV RBP, RSP
SUB RSP, 0x30
MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
LEA RAX,[s_Enter_your_name_]
MOV RDI,RAX
MOV EAX,0x0
CALL libc.so.6::printf
LEA RAX,[RBP - 0x30]
MOV RDI,RAX
MOV EAX,0x0
CALL libc.so.6::gets
LEA RAX,[RBP - 0x30]
MOV RSI,RAX
LEA RAX,[s_Welcome__s!]
MOV RDI,RAX
MOV EAX,0x0
CALL libc.so.6::printf
CMP DWORD PTR [RBP - 0xc],0xdeadbeef
JZ not_win
LEA RAX,[s_You_win!]
MOV RDI,RAX
CALL libc.so.6::puts
not_win:
MOV EAX,0x0
LEAVE
RET
`}
fontSize={30}
/>);
yield* beginSlide('Assembly code');
yield* code().edit(1.5, false)`
main:
PUSH RBP
MOV RBP, RSP
SUB RSP, 0x30
MOV DWORD PTR [RBP - 0xc], 0xdeadbeef${
remove(`
LEA RAX,[s_Enter_your_name_]
MOV RDI,RAX
MOV EAX,0x0
CALL libc.so.6::printf`)}
LEA RAX,[RBP - 0x30]
MOV RDI,RAX${
remove(`
MOV EAX,0x0`)}
CALL libc.so.6::gets
LEA RAX,[RBP - 0x30]
MOV RSI,RAX
LEA RAX,[s_Welcome__s!]
MOV RDI,RAX${
remove(`
MOV EAX,0x0`)}
CALL libc.so.6::printf
CMP DWORD PTR [RBP - 0xc],0xdeadbeef
JZ not_win
LEA RAX,[s_You_win!]
MOV RDI,RAX
CALL libc.so.6::puts
not_win:
MOV EAX,0x0
LEAVE
RET`;
yield* code().edit(1.5, false)`
main:
PUSH RBP
MOV RBP, RSP
SUB RSP, 0x30
MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
${edit(`LEA RAX,[RBP - 0x30]
MOV RDI,RAX`, "LEA RDI,[RBP - 0x30]")}
CALL libc.so.6::gets
${edit(`LEA RAX,[RBP - 0x30]
MOV RSI,RAX`, "LEA RSI,[RBP - 0x30]")}
${edit(`LEA RAX,[s_Welcome__s!]
MOV RDI,RAX`, "LEA RDI,[s_Welcome__s!]")}
CALL libc.so.6::printf
CMP DWORD PTR [RBP - 0xc],0xdeadbeef
JZ not_win
${edit(`LEA RAX,[s_You_win!]
MOV RDI,RAX`, "LEA RDI,[s_You_win!]")}
CALL libc.so.6::puts
not_win:
MOV EAX,0x0
LEAVE
RET`;
yield* code().edit(1.5, false)`
main:
PUSH RBP
MOV RBP, RSP
SUB RSP, 0x30${
insert(`
; local_c = 0xdeadbeef`)}
MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
LEA RDI,[RBP - 0x30]${
insert(`
; gets(local_30)`)}
CALL libc.so.6::gets
LEA RSI,[RBP - 0x30]
LEA RDI,[s_Welcome__s!]${
insert(`
; printf(\"Welcome %s!\\n\", local_30)`)}
CALL libc.so.6::printf${
insert(`
; if(local_c != 0xdeadbeef)`)}
CMP DWORD PTR [RBP - 0xc],0xdeadbeef
JZ not_win
LEA RDI,[s_You_win!]${
insert(`
; puts(\"You win!\")`)}
CALL libc.so.6::puts
not_win:${
insert(`
; return 0`)}
MOV EAX,0x0
LEAVE
RET`;
yield* beginSlide('Assembly code cleaned');
yield* code().edit(1.5, false)`
${insert(`; int main(void)
; int EAX:4 <RETURN>
; undefined4 Stack[-0xc]:4 local_c
; undefined1[44] Stack[-0x38]... local_38
`)}main:
PUSH RBP
MOV RBP, RSP
SUB RSP, 0x30
; local_c = 0xdeadbeef
MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
LEA RDI,[RBP - 0x30]
; gets(local_30)
CALL libc.so.6::gets
LEA RSI,[RBP - 0x30]
LEA RDI,[s_Welcome__s!]
; printf(\"Welcome %s!\\n\", local_30)
CALL libc.so.6::printf
; if(local_c != 0xdeadbeef)
CMP DWORD PTR [RBP - 0xc],0xdeadbeef
JZ not_win
LEA RDI,[s_You_win!]
; puts(\"You win!\")
CALL libc.so.6::puts
not_win:
; return 0
MOV EAX,0x0
LEAVE
RET`;
yield* beginSlide('Assembly code with header');
});