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+ added vestel

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Pari Malam
2026-06-04 19:46:23 +08:00
parent 6c51de5d9c
commit 7ccf2519ab
36 changed files with 810 additions and 222 deletions
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src/formats/pfl_upg/include.rs
+17 -33
View File
@@ -1,14 +1,13 @@
use crate::utils::common;
use crate::utils::aes::decrypt_aes256_ecb;
use binrw::BinRead;
use aes::Aes256;
use ecb::{Decryptor, cipher::{BlockDecryptMut, KeyInit, generic_array::GenericArray}};
use crate::keys;
use rsa::{RsaPublicKey, BigUint};
pub fn try_find_key(sig: &[u8], ciphertext: &[u8]) -> Result<Option<(String, [u8; 32])>, Box<dyn std::error::Error>> {
let mut result: Option<(String, [u8; 32])> = None;
for (name, n_hex) in keys::PFLUPG {
for (name, n_hex) in keys::PFLUPG {
let n = BigUint::from_bytes_be(&hex::decode(n_hex)?);
let e = BigUint::from_bytes_be(&hex::decode("010001")?);
let pubkey = RsaPublicKey::new(n, e)?;
@@ -17,17 +16,17 @@ pub fn try_find_key(sig: &[u8], ciphertext: &[u8]) -> Result<Option<(String, [u8
let dec_int = rsa::hazmat::rsa_encrypt(&pubkey, &sig_int)?;
let dec_sig = dec_int.to_bytes_le();
let aes_key = &dec_sig[20..52];
let dec_ciphertext = decrypt_aes256_ecb(aes_key.try_into().unwrap(), &ciphertext)?;
//needs to start with null-termninated filename string
let aes_key: [u8; 32] = dec_sig[20..52].try_into().unwrap();
let dec_ciphertext = decrypt_aes256_ecb(&aes_key, &ciphertext)?;
// Needs to start with null-terminated filename string
let end = match dec_ciphertext.iter().position(|&b| b == 0) {
Some(pos) => pos,
None => continue, //there is no 0, continue
None => continue, // There is no 0, continue
};
let fname = &dec_ciphertext[..end];
if fname.len() > 1 && fname.is_ascii() { //is ascii filename
result = Some((name.to_string(), aes_key.try_into().unwrap()));
if fname.len() > 1 && fname.is_ascii() { // Is ASCII filename
result = Some((name.to_string(), aes_key));
break
}
}
@@ -35,31 +34,16 @@ pub fn try_find_key(sig: &[u8], ciphertext: &[u8]) -> Result<Option<(String, [u8
Ok(result)
}
type Aes256EcbDec = Decryptor<Aes256>;
pub fn decrypt_aes256_ecb(key: [u8; 32], ciphertext: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let mut decryptor = Aes256EcbDec::new(&key.into());
let mut buffer = ciphertext.to_vec();
for chunk in buffer.chunks_exact_mut(16) {
let block: &mut [u8; 16] = chunk.try_into()?;
decryptor.decrypt_block_mut(GenericArray::from_mut_slice(block));
}
Ok(buffer)
}
#[derive(BinRead)]
pub struct Header {
_magic_bytes: [u8; 8],
pub header_size: u32, //data start
pub data_size: u32,
_crc32: u32,
pub mask: u32,
_data_size_decompressed: u32,
_padding2: u32,
description_bytes: [u8; 512],
_crc32: u32,
pub mask: u32,
_data_size_decompressed: u32,
_padding2: u32,
description_bytes: [u8; 512],
}
impl Header {
pub fn description(&self) -> String {
@@ -74,8 +58,8 @@ impl Header {
pub struct FileHeader {
file_name_bytes: [u8; 60],
pub real_size: u32,
pub stored_size: u32,
pub header_size: u32,
pub stored_size: u32,
pub header_size: u32,
pub attributes: [u8; 4],
}
impl FileHeader {
@@ -91,4 +75,4 @@ impl FileHeader {
pub fn is_package(&self) -> bool {
(self.attributes[3] & (1 << 2)) != 0
}
}
}