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pana_dvd: add support for DRIVE firmware decryption/decompression + some other tweaks

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theubusu
2026-02-16 19:11:47 +01:00
parent 530491e79a
commit 2519be0187
1 changed files with 89 additions and 41 deletions
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src/formats/pana_dvd.rs
+89 -41
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@@ -84,8 +84,10 @@ struct MainListEntry {
checksum: u32, //checksum of this MAIN entrys' data
}
const COMPRESSED_FILE_MAGIC: &[u8; 8] = b"EXTRHEAD";
#[derive(BinRead)]
struct MainEntryHeader {
struct CompressedFileHeader {
#[br(count = 14)] _header_string: Vec<u8>, //EXTRHEADDRV \x01\x00
compression_type_byte: u16,
decompressed_size: u32,
@@ -98,12 +100,12 @@ struct MainEntryHeader {
_checksum_flag: u8,
#[br(count = 19)] _unused: Vec<u8>,
}
impl MainEntryHeader {
impl CompressedFileHeader {
fn compression_type(&self) -> &str {
if self.compression_type_byte == 0 {
return "Uncompressed"
} else if self.compression_type_byte == 1 {
return "GZIP + LZSS"
return "GZIP"
} else if self.compression_type_byte == 2 {
return "LZSS"
} else {
@@ -198,7 +200,9 @@ pub fn extract_pana_dvd(mut file: &File, output_folder: &str, context: PanaDvdCo
if file_entry.size == 0 && file_entry.offset == 0 {
break
}
file_entries.push(FileEntry { offset: file_entry.offset, base_offset: context.base_hdr_size });
if !file_entries.iter().any(|f| f.offset == file_entry.offset ){
file_entries.push(FileEntry { offset: file_entry.offset, base_offset: context.base_hdr_size });
}
}
} else {
@@ -231,14 +235,20 @@ fn extract_file(file_reader: &mut Cursor<Vec<u8>>, offset: u64, base_offset: u64
let mut modules: Vec<ModuleEntry> = Vec::new();
for i in 0..100 {
let entry: ModuleEntry = hdr_reader.read_le()?;
let mut entry: ModuleEntry = hdr_reader.read_le()?;
if !entry.is_valid() {break};
println!("Module {} - Name: {}, Version: {}, Platform: {}, ID: {}, Offset: {}, Size: {}",
i + 1, entry.name(), entry.version(), entry.platform(), entry.id(), entry.offset, entry.size);
if modules.iter().any(|m| m.name() == entry.name()){
if modules.iter().any(|m| m.offset == entry.offset ){
println!("- Duplicate module, skipping!");
continue
}
//prevent collision of modules with the same name
if modules.iter().any(|m| m.name() == entry.name() ){
entry.name_bytes = format!("{}({})", entry.name(), i + 1).as_bytes().to_vec();
}
modules.push(entry);
}
@@ -254,14 +264,19 @@ fn extract_file(file_reader: &mut Cursor<Vec<u8>>, offset: u64, base_offset: u64
file_reader.seek(SeekFrom::Start(rel_offset))?;
if module.name() == "MAIN" {
println!("Extracting MAIN...");
println!("- Extracting MAIN...");
extract_main(file_reader, key, output_path)?;
continue
}
let data = common::read_exact(file_reader, module.size as usize)?;
println!("- Decrypting...");
let dec_data = decrypt_data(&data, &key);
let mut dec_data = decrypt_data(&data, &key);
if module.name().starts_with("DRV") {
println!("- Extracting DRIVE firmware...");
dec_data = extract_drv(dec_data, &key)?;
}
fs::create_dir_all(&output_folder)?;
let mut out_file = OpenOptions::new().write(true).create(true).open(output_path)?;
@@ -275,9 +290,12 @@ fn extract_file(file_reader: &mut Cursor<Vec<u8>>, offset: u64, base_offset: u64
fn extract_main(file_reader: &mut Cursor<Vec<u8>>, key: [u8; 8], output_path: PathBuf) -> Result<(), Box<dyn std::error::Error>> {
let main_list_hdr: MainListHeader = file_reader.read_le()?;
println!("MAIN - Entry count: {}, Decompressed part size: {}", main_list_hdr.entry_count(), main_list_hdr.decompressed_part_size);
assert!(main_list_hdr.entry_count() < 200, "Unreasonable MAIN entry count!");
if main_list_hdr.entry_count() > 200 {
println!("Unsupported MAIN data, skipping!");
return Ok(())
}
println!("MAIN - Entry count: {}, Decompressed part size: {}", main_list_hdr.entry_count(), main_list_hdr.decompressed_part_size);
let mut main_entries: Vec<MainListEntry> = Vec::new();
for i in 0..main_list_hdr.entry_count() {
let main_entry: MainListEntry = file_reader.read_le()?;
@@ -304,37 +322,9 @@ fn extract_main(file_reader: &mut Cursor<Vec<u8>>, key: [u8; 8], output_path: Pa
data.copy_from_slice(&decrypted);
}
let mut data_reader = Cursor::new(data);
let header: MainEntryHeader = data_reader.read_le()?;
println!("\nMAIN ({}/{}) - Compressed size: {}, Decompressed size: {}, Compression type: {}({})",
maine_i, main_entries.len(), header.compressed_size, header.decompressed_size, header.compression_type_byte, header.compression_type());
let compressed_data = common::read_exact(&mut data_reader, header.compressed_size as usize)?;
let decompressed_data;
if header.compression_type_byte == 1 { //gzip + lzss
println!("- (1/2) Decompressing GZIP...");
let decompressed_gzip = decompress_gzip(&compressed_data)?;
// the decompressed data has another header
let mut decompressed_gzip_reader = Cursor::new(decompressed_gzip);
let header: MainEntryHeader = decompressed_gzip_reader.read_le()?;
println!("- (2/2) Decompressing LZSS... (Compressed size: {}, Decompressed size: {})", header.compressed_size, header.decompressed_size);
let compressed_lzss = common::read_exact(&mut decompressed_gzip_reader, header.compressed_size as usize)?;
decompressed_data = decompress_lzss(&compressed_lzss);
assert!(decompressed_data.len() == header.decompressed_size as usize, "Decompressed size does not match size in header, decompression failed!");
} else if header.compression_type_byte == 2 { //only lzss
println!("- Decompressing LZSS...");
decompressed_data = decompress_lzss(&compressed_data);
assert!(decompressed_data.len() == header.decompressed_size as usize, "Decompressed size does not match size in header, decompression failed!");
} else if header.compression_type_byte == 0 { //no compression. havent encountered one yet
decompressed_data = compressed_data;
} else {
println!("- Unknown compression method!");
decompressed_data = compressed_data;
}
print!("\nMAIN ({}/{}) - ", maine_i, main_entries.len());
let decompressed_data = decompress_data(&data)?;
let mut out_file = OpenOptions::new().append(true).create(true).open(&output_path)?;
out_file.write_all(&decompressed_data)?;
@@ -342,4 +332,62 @@ fn extract_main(file_reader: &mut Cursor<Vec<u8>>, key: [u8; 8], output_path: Pa
}
Ok(())
}
fn decompress_data(data: &[u8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let mut data_reader = Cursor::new(data);
let header: CompressedFileHeader = data_reader.read_le()?;
println!("Compressed size: {}, Decompressed size: {}, Compression type: {}({})",
header.compressed_size, header.decompressed_size, header.compression_type_byte, header.compression_type());
let compressed_data = common::read_exact(&mut data_reader, header.compressed_size as usize)?;
let decompressed_data;
if header.compression_type_byte == 1 { //gzip + optionally lzss
println!("- Decompressing GZIP...");
let decompressed_gzip = decompress_gzip(&compressed_data)?;
// the decompressed data can have another header
if decompressed_gzip.starts_with(COMPRESSED_FILE_MAGIC) {
decompressed_data = decompress_data(&decompressed_gzip)?;
} else {
decompressed_data = decompressed_gzip;
}
} else if header.compression_type_byte == 2 { //only lzss
println!("- Decompressing LZSS...");
decompressed_data = decompress_lzss(&compressed_data);
if decompressed_data.len() != header.decompressed_size as usize {
return Err("Decompressed size does not match size in header, decompression failed!".into());
}
} else if header.compression_type_byte == 0 { //no compression. havent encountered one yet
decompressed_data = compressed_data;
} else {
println!("- Unknown compression method!");
decompressed_data = compressed_data;
}
Ok(decompressed_data)
}
fn extract_drv(mut data: Vec<u8>, key: &[u8; 8]) -> Result<Vec<u8>, Box<dyn std::error::Error>> {
let data_size = data.len();
let decrypt_size: usize = 10240;
let header_size = 0x20;
//decrypt first and last 10240b (execpt last 48b)
let first_decrypted = decrypt_data(&data[..decrypt_size], &key);
data[..decrypt_size].copy_from_slice(&first_decrypted);
let last_decrypted = decrypt_data(&data[data_size as usize - decrypt_size - 48..data_size - 48], &key);
data[data_size as usize - decrypt_size - 48..data_size - 48].copy_from_slice(&last_decrypted);
//can be compressed
if data[header_size..].starts_with(COMPRESSED_FILE_MAGIC) {
let decompressed = decompress_data(&data[header_size..])?;
data.truncate(header_size);
data.extend_from_slice(&decompressed);
}
Ok(data)
}