61 lines
1.5 KiB
Rust
61 lines
1.5 KiB
Rust
use aes::{
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cipher::{generic_array::GenericArray, BlockDecrypt, KeyInit},
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Aes128,
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};
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use anyhow::Result;
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use rand::{self, RngCore};
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use crate::hex;
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#[allow(non_camel_case_types)]
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#[repr(u8)]
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#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
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pub enum MsgType {
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HANDSHAKE_REQUEST = 0x0,
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ANDSHAKE_RESPONSE = 0x1,
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ENCRYPTED_RESPONSE = 0x3,
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ENCRYPTED_REQUEST = 0x6,
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}
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pub struct Security;
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impl Security {
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pub fn decrypt(data: &mut [u8]) -> &[u8] {
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const N: u128 = 141661095494369103254425781617665632877;
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const KEY: [u8; 16] = N.to_be_bytes();
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let array = GenericArray::from(KEY);
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let cipher = Aes128::new(&array);
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for chunk in data.chunks_mut(16) {
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let mut block = GenericArray::from_mut_slice(chunk);
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cipher.decrypt_block(&mut block);
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}
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data
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}
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pub fn encode_8370(msg_type: MsgType) -> Result<String> {
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let mut header = hex("83,70")?;
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let mut data: Vec<u8> = Vec::new();
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let mut size = data.len();
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let mut padding = 0;
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if msg_type == MsgType::ENCRYPTED_RESPONSE || msg_type == MsgType::ENCRYPTED_REQUEST {
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if (size + 2) % 16 != 0 {
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padding = 16 - ((size + 2) & 0xf);
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size += padding + 32;
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data.extend({
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let mut d = vec![0; padding];
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rand::thread_rng().fill_bytes(&mut d);
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d
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});
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}
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}
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todo!()
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}
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}
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