mirror of
https://github.com/doukutsu-rs/doukutsu-rs
synced 2024-11-01 12:04:14 +00:00
14 lines
389 B
Rust
14 lines
389 B
Rust
|
pub fn decrypt_tsc(buf: &mut [u8]) {
|
||
|
|
let half = buf.len() / 2;
|
||
|
|
let key = if let Some(0) = buf.get(half) { 0xf9 } else { (-(*buf.get(half).unwrap() as isize)) as u8 };
|
||
|
|
log::info!("Decrypting TSC using key {:#x}", key);
|
||
|
|
|
||
|
|
for (idx, byte) in buf.iter_mut().enumerate() {
|
||
|
|
if idx == half {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
*byte = byte.wrapping_add(key);
|
||
|
|
}
|
||
|
|
}
|