Description

for four pianos.

Writeup

[0x0] Prerequisite

๋ฌธ์ œ๋ฅผ ํ’€๊ธฐ ์œ„ํ•ด ์‚ฌ์ „์ ์œผ๋กœ ์•Œ๊ณ  ์žˆ์œผ๋ฉด ์ข‹์€ ๊ฒƒ๋“ค

<aside> ๐Ÿ’ก ๋‚œ์ด๋„: Extreme

</aside>

xi์˜ ๊ณก d e a t h p i a n o ~ for four pianos ~ ๋ฅผ ์ฐธ๊ณ ํ•˜์—ฌ ๋งŒ๋“  ๋ฌธ์ œ์ด๋‹ค.

[0x1] Abstract

๋ฌธ์ œ๋Š” ๋‹จ ํ•˜๋‚˜์˜ ๋ฐ”์ด๋„ˆ๋ฆฌ piano.exe๋กœ ๊ตฌ์„ฑ๋˜์–ด์žˆ๋‹ค.

piano.exe ๋Š” Main Piano, Secondary Piano, Prepared Piano 1, Prepared Piano 2 ์ด ๋„ค ๊ฐœ์˜ โ€œํ”ผ์•„๋…ธโ€๋ฅผ ๋Ÿฐ์นญํ•œ๋‹ค. ์ด๋•Œ ๊ฐ ํ”ผ์•„๋…ธ ๊ฐ์ฒด๋Š” ํ”„๋กœ์„ธ์Šค๋กœ ์ด๋ฃจ์–ด์ ธ ์žˆ์œผ๋ฉฐ ์ด ๋„ค ๊ฐœ์˜ ํ”„๋กœ์„ธ์Šค๋ผ๋ฆฌ IPC๋กœ ํ†ต์‹ ํ•˜๋ฉฐ ์ตœ์ข… ํ”Œ๋ž˜๊ทธ๋ฅผ ๊ฒ€์‚ฌํ•˜๋Š” ๊ฒƒ์ด ์ด ํ”„๋กœ๊ทธ๋žจ์˜ ๊ธฐ๋ณธ ๊ฐœ๋…์ด๋‹ค.

[0x2] Detail

๋จผ์ € piano.exe ๊ฐ์ฒด๋Š” Main Piano ์ด๊ณ  Main Piano ๋Š” AES-CBC๋ฅผ ์ด์šฉํ•ด์„œ ๋‚จ์€ 3๊ฐœ์˜ ํ”ผ์•„๋…ธ๋ฅผ ๋ณตํ˜ธํ™”ํ•œ ๋’ค CreateProcess๋กœ ๋Ÿฐ์นญํ•œ๋‹ค.