Clean path before checking if valid.

reader_file.go

@@ -220,13 +220,13 @@ func (f File) ExtractWithOptions(folder string, op ExtractionOptions) error {
 
 func (f File) realExtract(folder string, op ExtractionOptions) error {
 	err := os.MkdirAll(folder, op.FolderPerm)
+	folder = filepath.Clean(folder)
 	if err != nil && !os.IsExist(err) {
 		if op.Verbose {
 			log.Println("Error while creating extraction folder")
 		}
 		return err
 	}
-	folder = filepath.Clean(folder)
 	if f.IsDir() {
 		filFS, _ := f.FS()
 		var ents []directory.Entry

reader_fs.go

@@ -41,6 +41,7 @@ func (r Reader) newFS(e directory.Entry, parent *FS) (*FS, error) {
 
 // Open opens the file at name. Returns a squashfs.File.
 func (f FS) Open(name string) (fs.File, error) {
+	name = filepath.Clean(name)
 	if !fs.ValidPath(name) {
 		return nil, &fs.PathError{
 			Op:   "open",
@@ -48,7 +49,6 @@ func (f FS) Open(name string) (fs.File, error) {
 			Err:  fs.ErrInvalid,
 		}
 	}
-	name = filepath.Clean(name)
 	if name == "." || name == "" {
 		return f.File, nil
 	}
@@ -100,6 +100,7 @@ func (f FS) Open(name string) (fs.File, error) {
 // All paths are relative to the FS.
 // Uses filepath.Match to compare names.
 func (f FS) Glob(pattern string) (out []string, err error) {
+	pattern = filepath.Clean(pattern)
 	if !fs.ValidPath(pattern) {
 		return nil, &fs.PathError{
 			Op:   "glob",
@@ -107,7 +108,6 @@ func (f FS) Glob(pattern string) (out []string, err error) {
 			Err:  fs.ErrInvalid,
 		}
 	}
-	pattern = filepath.Clean(pattern)
 	split := strings.Split(pattern, "/")
 	for i := 0; i < len(f.e); i++ {
 		if match, _ := path.Match(split[0], f.e[i].Name); match {
@@ -159,6 +159,7 @@ func (f FS) Glob(pattern string) (out []string, err error) {
 // ReadDir returns all the DirEntry returns all DirEntry's for the directory at name.
 // If name is not a directory, returns an error.
 func (f FS) ReadDir(name string) ([]fs.DirEntry, error) {
+	name = filepath.Clean(name)
 	if !fs.ValidPath(name) {
 		return nil, &fs.PathError{
 			Op:   "readdir",
@@ -166,7 +167,6 @@ func (f FS) ReadDir(name string) ([]fs.DirEntry, error) {
 			Err:  fs.ErrInvalid,
 		}
 	}
-	name = filepath.Clean(name)
 	if name == "." || name == "" {
 		return f.File.ReadDir(-1)
 	}
@@ -258,6 +258,7 @@ func (f FS) ReadFile(name string) ([]byte, error) {
 
 // Stat returns the fs.FileInfo for the file at name.
 func (f FS) Stat(name string) (fs.FileInfo, error) {
+	name = filepath.Clean(strings.TrimPrefix(name, "/"))
 	if !fs.ValidPath(name) {
 		return nil, &fs.PathError{
 			Op:   "stat",
@@ -265,7 +266,6 @@ func (f FS) Stat(name string) (fs.FileInfo, error) {
 			Err:  fs.ErrInvalid,
 		}
 	}
-	name = filepath.Clean(strings.TrimPrefix(name, "/"))
 	if name == "." || name == "" {
 		return f.File.Stat()
 	}
@@ -327,6 +327,7 @@ func (f FS) Stat(name string) (fs.FileInfo, error) {
 
 // Sub returns the FS at dir
 func (f FS) Sub(dir string) (fs.FS, error) {
+	dir = filepath.Clean(dir)
 	if !fs.ValidPath(dir) {
 		return nil, &fs.PathError{
 			Op:   "sub",
@@ -334,7 +335,6 @@ func (f FS) Sub(dir string) (fs.FS, error) {
 			Err:  fs.ErrInvalid,
 		}
 	}
-	dir = filepath.Clean(dir)
 	if dir == "." || dir == "" {
 		return f, nil
 	}

squashfs_test.go

@@ -57,6 +57,21 @@ func preTest(dir string) (fil *os.File, err error) {
 	return
 }
 
+func TestMisc(t *testing.T) {
+	tmpDir := "testing"
+	fil, err := preTest(tmpDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rdr, err := squashfs.NewReader(fil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_ = rdr
+	// Put testing here
+	t.Fatal("UM")
+}
+
 func BenchmarkRace(b *testing.B) {
 	// tmpDir := b.TempDir()
 	tmpDir := "testing"