PurpleCelloServer
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mc_protocol
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Reversed aes/cfb8 state

This commit is contained in:
Kyler 2024-06-02 21:57:25 -06:00
parent 23fcf954af
commit 9be71312ab
1 changed files with 5 additions and 5 deletions
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10
src/encrypt.rs
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@ -61,17 +61,17 @@ impl McCipher {
} }
fn shift_left(mut arr: [u8; 16], new: u8) { fn shift_left(mut arr: [u8; 16], new: u8) {
for i in 0..arr.len() - 1 { for i in 1..arr.len() {
arr[i] = arr[i + 1]; arr[i] = arr[i - 1];
} }
arr[15] = new; arr[0] = new;
} }
fn encrypt_block(&self, data: u8) -> u8 { fn encrypt_block(&self, data: u8) -> u8 {
let cipher = Aes128::new(GenericArray::from_slice(&self.key)); let cipher = Aes128::new(GenericArray::from_slice(&self.key));
let mut block = GenericArray::clone_from_slice(&self.state_en); let mut block = GenericArray::clone_from_slice(&self.state_en);
cipher.encrypt_block(&mut block); cipher.encrypt_block(&mut block);
let data = data ^ block[0]; let data = data ^ block[15];
Self::shift_left(self.state_en, data); Self::shift_left(self.state_en, data);
data data
} }
@ -81,7 +81,7 @@ impl McCipher {
let mut block = GenericArray::clone_from_slice(&self.state_de); let mut block = GenericArray::clone_from_slice(&self.state_de);
cipher.decrypt_block(&mut block); cipher.decrypt_block(&mut block);
Self::shift_left(self.state_de, data); Self::shift_left(self.state_de, data);
let data = data ^ block[0]; let data = data ^ block[15];
data data
} }
} }