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+ added vestel

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This commit is contained in:
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/epk/mod.rs
+12 -38
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@@ -3,6 +3,7 @@ use std::io::Seek;
use crate::AppContext;
use crate::utils::common;
use crate::utils::aes::decrypt_aes_ecb_auto;
use crate::formats;
pub struct EpkContext {
@@ -29,13 +30,13 @@ fn check_epk_version(versions: &[u8]) -> Option<u8> {
if match_with_pattern(&versions, epk2_pattern) {
Some(2)
} else if match_with_pattern(&versions, epk3_pattern) {
} else if match_with_pattern(&versions, epk3_pattern) {
Some(3)
} else if match_with_pattern(&versions, epk3_another_pattern) {
} else if match_with_pattern(&versions, epk3_another_pattern) {
Some(3)
} else if match_with_pattern(&versions, epk3_new_pattern) {
} else if match_with_pattern(&versions, epk3_new_pattern) {
Some(3)
}else {
} else {
None
}
}
@@ -61,7 +62,7 @@ pub fn extract_epk(app_ctx: &AppContext, ctx: Box<dyn Any>) -> Result<(), Box<dy
let platform_version = common::string_from_bytes(&versions[4..20]);
let sdk_version = common::string_from_bytes(&versions[20..36]);
println!("Platform version: {}\nSDK version: {}", platform_version, sdk_version);
file.seek(std::io::SeekFrom::Start(0))?;
if ctx.epk_version == 2 {
@@ -75,7 +76,11 @@ pub fn extract_epk(app_ctx: &AppContext, ctx: Box<dyn Any>) -> Result<(), Box<dy
Ok(())
}
//COMMON EPK FUNCTIONS
// COMMON EPK FUNCTIONS
/// Try each key in `key_array` to find one that decrypts `data` with a header
/// matching `expected_magic`. Returns the key name and the raw key bytes on
/// success, or `None` if no key works.
pub fn find_key<'a>(key_array: &'a [(&'a str, &'a str)], data: &[u8], expected_magic: &[u8]) -> Result<Option<(&'a str, Vec<u8>)>, Box<dyn std::error::Error>> {
for (key_hex, name) in key_array {
let key_bytes = hex::decode(key_hex)?;
@@ -83,41 +88,10 @@ pub fn find_key<'a>(key_array: &'a [(&'a str, &'a str)], data: &[u8], expected_m
Ok(d) => d,
Err(_) => continue,
};
if decrypted.starts_with(expected_magic) {
return Ok(Some((name, key_bytes)));
}
}
Ok(None)
}
use aes::Aes128;
use aes::Aes256;
use ecb::{Decryptor, cipher::{BlockDecryptMut, KeyInit, generic_array::GenericArray}};
type Aes128EcbDec = Decryptor<Aes128>;
type Aes256EcbDec = Decryptor<Aes256>;
pub fn decrypt_aes_ecb_auto(key: &[u8], ciphertext: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let mut buffer = ciphertext.to_vec();
if key.len() == 32 {
// aes256
let key_array: [u8; 32] = key.try_into()?;
let mut decryptor = Aes256EcbDec::new(&key_array.into());
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));
}
} else {
// aes128
let key_array: [u8; 16] = key.try_into()?;
let mut decryptor = Aes128EcbDec::new(&key_array.into());
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)
}