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#1 12.09.2025

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Mstar module
This commit is contained in:
theubusu
2025-09-12 00:11:55 +02:00
parent eb7d808593
commit 2ccbcad559
3 changed files with 103 additions and 34 deletions
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src/formats/mstar.rs
+69 -33
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@@ -1,14 +1,15 @@
use std::fs::{self, File, OpenOptions};
use std::path::{Path};
use std::io::{Write};
use std::io::{Write, Cursor};
use lz4::block::decompress;
use lzma_rs::lzma_decompress;
use crate::common;
pub fn is_mstar_file(file: &File) -> bool {
let header = common::read_file(&file, 0, 32768).expect("Failed to read from file.");
let header_string = String::from_utf8_lossy(&header);
if header_string.contains("filepartload") & header_string.contains("MstarUpgrade") | header_string.contains("CtvUpgrade") {
if header_string.contains("filepartload") & header_string.contains("MstarUpgrade") | header_string.contains("CtvUpgrade") | header_string.contains("LetvUpgrade"){
true
} else {
false
@@ -23,6 +24,14 @@ fn parse_number(s: &str) -> Option<u64> {
}
}
fn decompress_lzma(compressed_data: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let mut input = Cursor::new(compressed_data);
let mut output = Vec::new();
lzma_decompress(&mut input, &mut output)?;
Ok(output)
}
fn decompress_lz4(compressed_data: &[u8], original_size: i32) -> Result<Vec<u8>, std::io::Error> {
match decompress(compressed_data, Some(original_size)) {
Ok(decompressed) => Ok(decompressed),
@@ -32,6 +41,7 @@ fn decompress_lz4(compressed_data: &[u8], original_size: i32) -> Result<Vec<u8>,
pub fn extract_mstar(file: &File, output_folder: &str) -> Result<(), Box<dyn std::error::Error>> {
println!();
let mut script = common::read_file(&file, 0, 32768)?;
if let Some(pos) = script.iter().position(|x| [0x00, 0xFF].contains(x)) {
@@ -40,11 +50,15 @@ pub fn extract_mstar(file: &File, output_folder: &str) -> Result<(), Box<dyn std
let mut script_string = String::from_utf8_lossy(&script);
//println!("{}", script_string);
if script_string == "" {
//try ts hisense
//try for hisense
println!("Failed to get script at 0x0, trying 0x1000...");
script = common::read_file(&file, 4096, 32768)?;
if let Some(pos) = script.iter().position(|x| [0x00, 0xFF].contains(x)) {
script.truncate(pos);
}
script_string = String::from_utf8_lossy(&script);
if script_string == "" {
@@ -77,16 +91,27 @@ pub fn extract_mstar(file: &File, output_folder: &str) -> Result<(), Box<dyn std
let mut j = i + 1;
while j < lines.len() && !lines[j].starts_with("filepartload") {
//get compression method
if lines[j].contains("mscompress7") {
compression = "lzma";
} else if lines[j].contains("lz4") {
compression = "lz4";
if lines[j].starts_with("mscompress7"){
if compression == "none" {
compression = "lzma";
} else if compression == "lzma" {
//thank the turks
compression = "double_lzma";
}
}
if lines[j].starts_with("lz4"){
compression = "lz4";
let parts: Vec<&str> = lines[j].split_whitespace().collect();
lz4_expect_size = parse_number(parts[5]).unwrap_or(0);
}
if lines[j].starts_with("mmc unlzo"){
compression = "lzo";
let parts: Vec<&str> = lines[j].split_whitespace().collect();
// get part name from mmc unlzo
if partname == "unknown" {
partname = parts[4]
}
}
// check if its boot partition
if lines[j].starts_with("mmc write.boot") {
@@ -106,40 +131,51 @@ pub fn extract_mstar(file: &File, output_folder: &str) -> Result<(), Box<dyn std
j += 1;
}
println!("offset: {} size: {} --> {} (compression: {})", offset, size, partname, compression);
println!("Part - Offset: {}, Size: {} --> {}.bin", offset, size, partname);
let data = common::read_file(&file, offset, size.try_into().unwrap())?;
//println!("{:02x?}", &data[0]);
//println!("{}", data.len());
let out_data;
if compression == "lzma" {
// TODO: do lzma decompression
out_data = data;
} else if compression == "lz4" {
println!("- Decompressing lz4, expected size: {}", lz4_expect_size);
out_data = decompress_lz4(&data, lz4_expect_size.try_into().unwrap())?;
//out_data = data;
if partname == "unknown"{
println!("- Unknown destination, skipping!");
} else {
out_data = data;
}
let data = common::read_file(&file, offset, size.try_into().unwrap())?;
let out_data;
let output_path = Path::new(&output_folder).join(partname.to_owned() + ".bin");
if compression == "lzma" {
println!("- Decompressing LZMA...");
out_data = decompress_lzma(&data)?;
} else if compression == "double_lzma" {
println!("- Decompressing LZMA (Pass 1)...");
let pass_1 = decompress_lzma(&data)?;
println!("- Decompressing LZMA (Pass 2)...");
out_data = decompress_lzma(&pass_1)?;
} else if compression == "lz4" {
println!("- Decompressing lz4, expected size: {}", lz4_expect_size);
out_data = decompress_lz4(&data, lz4_expect_size.try_into().unwrap())?;
} else if compression == "lzo" {
//TODO: add lzo
println!("- Decompressing lzo...");
out_data = data;
}else {
out_data = data;
}
fs::create_dir_all(&output_folder)?;
let mut out_file = OpenOptions::new()
.append(true)
.create(true)
.open(output_path)?;
let output_path = Path::new(&output_folder).join(partname.to_owned() + ".bin");
out_file.write_all(&out_data)?;
fs::create_dir_all(&output_folder)?;
let mut out_file = OpenOptions::new()
.append(true)
.create(true)
.open(output_path)?;
out_file.write_all(&out_data)?;
}
}
}
i += 1;
}
println!();
println!("Extraction finished!");
Ok(())
}