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Add re-packing (WIP)
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30
README.md
30
README.md
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@ -1,14 +1,36 @@
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# Stargazer
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Tool to extract STAR files from the PSX used by its package manager "PackmanJr".
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Tool to extract and repack STAR files from the PSX used by its package manager "PackmanJr".
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More info: <https://playstationdev.wiki/ps2devwiki/index.php/STAR_Files>
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## Usage
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```bash
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stargazer <file> [output dir (optional)]
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```txt
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Usage: stargazer <operation> <arguments>
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To extract files:
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stargazer x <star file> [output dir (optional)]
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To pack a folder:
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stargazer p <input dir> <star file>
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```
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If no output directory is given, the file is extracted to the file name minus the extension plus "`_extracted`" (e.g. `xPackmanJr_0.105.star` -> `xPackmanJr_0.105_extracted`).
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If no output directory is given, the file is extracted to the file name minus the extension plus "`_extracted`" (
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e.g. `xPackmanJr_0.105.star` -> `xPackmanJr_0.105_extracted`). Same goes for packing (it will append `_packed.star`).
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**NOTE:** Packing is experimental since I have no way to test it and I'm not sure about the limitations of the system (e.g. filenames). I also don't know if the order of the files is relevant.
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## Credits
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Thanks to @martravi for helping with reverse-engineering!
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## Changelog
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### v2.0
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- Add re-packing (experimental)
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### v1.0
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- Initial release
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186
main.go
186
main.go
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@ -1,115 +1,33 @@
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package main
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import (
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"bytes"
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"crypto/sha1"
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"encoding/binary"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"os"
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"path/filepath"
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"strings"
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)
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const VERSION = "1.0"
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const VERSION = "2.0"
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type (
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Header struct {
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Unknown1stByte int8
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Unknown2ndByte int8
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Filesize uint32
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FilenameSize int8
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MaybePadding int8
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}
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Entry struct {
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Header
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FileName []byte
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Content []byte
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Sha1 [20]byte
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}
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Star struct {
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Entries []Entry
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}
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)
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func (e *Entry) GetFileName() string {
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return string(e.FileName[:])
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func usage() {
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fmt.Println("Usage: stargazer <operation> <arguments>")
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fmt.Println("")
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fmt.Println(" To extract files:")
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fmt.Println(" stargazer x <star file> [output dir (optional)]")
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fmt.Println("")
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fmt.Println(" To pack a folder:")
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fmt.Println(" stargazer p <input dir> <star file>")
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fmt.Println("")
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os.Exit(1)
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}
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func (e *Entry) CalculateSha1() []byte {
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h := sha1.New()
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h.Write(e.Content)
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return h.Sum(nil)
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}
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func (e *Entry) GetSha1() string {
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return fmt.Sprintf("%x", e.Sha1)
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}
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func (e *Entry) Extract(outputDir string) error {
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fp := filepath.Join(outputDir, e.GetFileName())
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err := os.MkdirAll(filepath.Dir(fp), os.ModePerm)
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if err != nil {
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return err
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}
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f, err := os.Create(fp)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = f.Write(e.Content)
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if err != nil {
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return err
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}
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return nil
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}
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func ParseEntry(file io.Reader) (*Entry, error) {
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entry := Entry{}
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err := binary.Read(file, binary.LittleEndian, &entry.Header.Unknown1stByte)
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if err == io.EOF {
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return nil, err
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}
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binary.Read(file, binary.LittleEndian, &entry.Header.Unknown2ndByte)
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binary.Read(file, binary.LittleEndian, &entry.Header.Filesize)
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binary.Read(file, binary.LittleEndian, &entry.Header.FilenameSize)
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binary.Read(file, binary.LittleEndian, &entry.Header.MaybePadding)
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filename := make([]byte, entry.Header.FilenameSize)
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binary.Read(file, binary.LittleEndian, &filename)
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entry.FileName = filename
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entry.Content = make([]byte, entry.Header.Filesize)
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binary.Read(file, binary.LittleEndian, &entry.Content)
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binary.Read(file, binary.LittleEndian, &entry.Sha1)
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calculatedHash := entry.CalculateSha1()
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if !bytes.Equal(calculatedHash, entry.Sha1[:]) {
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log.Fatalln("Hash mismatch")
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}
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return &entry, nil
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}
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func main() {
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fmt.Printf("Stargazer v%s\n", VERSION)
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flag.Parse()
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if flag.NArg() < 1 || flag.NArg() > 2 {
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fmt.Println("Usage: stargazer <file> [output dir (optional)]")
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os.Exit(1)
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}
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inputFile := flag.Arg(0)
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outputDir := flag.Arg(1)
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func extract() {
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inputFile := flag.Arg(1)
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outputDir := flag.Arg(2)
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if outputDir == "" {
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outputDir = fmt.Sprintf("%s_extracted", filepath.Base(strings.TrimSuffix(inputFile, filepath.Ext(inputFile))))
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}
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@ -147,3 +65,77 @@ func main() {
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log.Println("Extraction complete!")
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}
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func pack() {
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log.Printf("WARNING!!! Packing is experimental and may not work properly!\n")
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inputDir := flag.Arg(1)
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outputFile := flag.Arg(2)
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if outputFile == "" {
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outputFile = fmt.Sprintf("%s_packed.star", filepath.Base(inputDir))
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}
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log.Println("Reading files...")
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var star Star
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err := filepath.Walk(inputDir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.IsDir() {
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return nil
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}
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entry := Entry{}
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fp := strings.TrimPrefix(path, inputDir)
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fp = strings.TrimPrefix(fp, string(os.PathSeparator))
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entry.FileName = []byte(strings.ReplaceAll(fp, "\\", "/"))
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entry.Content, err = ioutil.ReadFile(path)
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if err != nil {
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return err
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}
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entry.Header.Headersize = uint8(8 + len(entry.GetFileName()))
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entry.Header.Filesize = uint32(len(entry.Content))
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entry.Header.FilenameSize = uint8(len(entry.GetFileName()))
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copy(entry.Sha1[:], entry.CalculateSha1())
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star.Entries = append(star.Entries, entry)
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return nil
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})
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if err != nil {
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log.Fatalln(err)
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}
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log.Println("Packing...")
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file, err := os.Create(outputFile)
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if err != nil {
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log.Fatalln(err)
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}
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defer file.Close()
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for _, entry := range star.Entries {
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log.Printf("Packing %s...\n", entry.GetFileName())
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err := entry.Pack(file)
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if err != nil {
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log.Fatalln(err)
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}
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}
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log.Println("Packing complete!")
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}
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func main() {
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fmt.Printf("Stargazer v%s\n", VERSION)
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flag.Parse()
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if flag.NArg() < 1 || flag.NArg() > 3 {
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usage()
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os.Exit(1)
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}
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operation := flag.Arg(0)
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switch operation {
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case "x":
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extract()
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case "p":
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pack()
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default:
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usage()
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}
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}
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118
star.go
Normal file
118
star.go
Normal file
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@ -0,0 +1,118 @@
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package main
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import (
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"bytes"
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"crypto/sha1"
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"encoding/binary"
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"fmt"
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"io"
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"log"
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"os"
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"path/filepath"
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)
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type (
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Header struct {
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Headersize uint8
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Padding1 uint8
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Filesize uint32
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FilenameSize uint8
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Padding2 uint8
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}
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Entry struct {
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Header
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FileName []byte
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Content []byte
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Sha1 [20]byte
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}
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Star struct {
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Entries []Entry
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}
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)
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func (e *Entry) GetFileName() string {
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return string(e.FileName[:])
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}
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func (e *Entry) CalculateSha1() []byte {
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h := sha1.New()
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h.Write(e.Content)
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return h.Sum(nil)
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}
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func (e *Entry) GetSha1() string {
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return fmt.Sprintf("%x", e.Sha1)
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}
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func (e *Entry) Extract(outputDir string) error {
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fp := filepath.Join(outputDir, e.GetFileName())
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err := os.MkdirAll(filepath.Dir(fp), os.ModePerm)
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if err != nil {
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return err
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}
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f, err := os.Create(fp)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = f.Write(e.Content)
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if err != nil {
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return err
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}
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return nil
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}
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func (e *Entry) Pack(file *os.File) error {
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err := binary.Write(file, binary.LittleEndian, e.Header)
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if err != nil {
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return err
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}
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_, err = file.Write(e.FileName)
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if err != nil {
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return err
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}
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_, err = file.Write(e.Content)
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if err != nil {
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return err
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}
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_, err = file.Write(e.Sha1[:])
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if err != nil {
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return err
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}
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return nil
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}
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func ParseEntry(file io.Reader) (*Entry, error) {
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entry := Entry{}
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err := binary.Read(file, binary.LittleEndian, &entry.Header.Headersize)
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if err == io.EOF {
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return nil, err
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}
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binary.Read(file, binary.LittleEndian, &entry.Header.Padding1)
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binary.Read(file, binary.LittleEndian, &entry.Header.Filesize)
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binary.Read(file, binary.LittleEndian, &entry.Header.FilenameSize)
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binary.Read(file, binary.LittleEndian, &entry.Header.Padding2)
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filename := make([]byte, entry.Header.FilenameSize)
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binary.Read(file, binary.LittleEndian, &filename)
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entry.FileName = filename
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entry.Content = make([]byte, entry.Header.Filesize)
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binary.Read(file, binary.LittleEndian, &entry.Content)
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binary.Read(file, binary.LittleEndian, &entry.Sha1)
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calculatedHash := entry.CalculateSha1()
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if !bytes.Equal(calculatedHash, entry.Sha1[:]) {
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log.Fatalln("Hash mismatch")
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}
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return &entry, nil
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}
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