package tarutil import ( "archive/tar" "io" "os" "path/filepath" "strings" logging "github.com/ipfs/go-log/v2" "golang.org/x/xerrors" ) var log = logging.Logger("tarutil") // nolint var CacheFileConstraints = map[string]int64{ "p_aux": 64, "t_aux": 10240, "sc-02-data-tree-r-last.dat": 10_000_000, // small sectors "sc-02-data-tree-r-last-0.dat": 10_000_000, "sc-02-data-tree-r-last-1.dat": 10_000_000, "sc-02-data-tree-r-last-2.dat": 10_000_000, "sc-02-data-tree-r-last-3.dat": 10_000_000, "sc-02-data-tree-r-last-4.dat": 10_000_000, "sc-02-data-tree-r-last-5.dat": 10_000_000, "sc-02-data-tree-r-last-6.dat": 10_000_000, "sc-02-data-tree-r-last-7.dat": 10_000_000, "sc-02-data-tree-r-last-8.dat": 10_000_000, "sc-02-data-tree-r-last-9.dat": 10_000_000, "sc-02-data-tree-r-last-10.dat": 10_000_000, "sc-02-data-tree-r-last-11.dat": 10_000_000, "sc-02-data-tree-r-last-12.dat": 10_000_000, "sc-02-data-tree-r-last-13.dat": 10_000_000, "sc-02-data-tree-r-last-14.dat": 10_000_000, "sc-02-data-tree-r-last-15.dat": 10_000_000, "sc-02-data-layer-1.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-2.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-3.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-4.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-5.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-6.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-7.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-8.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-9.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-10.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-layer-11.dat": 65 << 30, // 1x sector size + small buffer "sc-02-data-tree-c-0.dat": 5 << 30, // ~4.6G "sc-02-data-tree-c-1.dat": 5 << 30, "sc-02-data-tree-c-2.dat": 5 << 30, "sc-02-data-tree-c-3.dat": 5 << 30, "sc-02-data-tree-c-4.dat": 5 << 30, "sc-02-data-tree-c-5.dat": 5 << 30, "sc-02-data-tree-c-6.dat": 5 << 30, "sc-02-data-tree-c-7.dat": 5 << 30, "sc-02-data-tree-c-8.dat": 5 << 30, "sc-02-data-tree-c-9.dat": 5 << 30, "sc-02-data-tree-c-10.dat": 5 << 30, "sc-02-data-tree-c-11.dat": 5 << 30, "sc-02-data-tree-c-12.dat": 5 << 30, "sc-02-data-tree-c-13.dat": 5 << 30, "sc-02-data-tree-c-14.dat": 5 << 30, "sc-02-data-tree-c-15.dat": 5 << 30, "sc-02-data-tree-d.dat": 130 << 30, // 2x sector size, ~130G accunting for small buffer on 64G sectors } func ExtractTar(body io.Reader, dir string, buf []byte) (int64, error) { if err := os.MkdirAll(dir, 0755); err != nil { // nolint return 0, xerrors.Errorf("mkdir: %w", err) } tr := tar.NewReader(body) var read int64 for { header, err := tr.Next() switch err { default: return read, err case io.EOF: return read, nil case nil: } sz, found := CacheFileConstraints[header.Name] if !found { return read, xerrors.Errorf("tar file %#v isn't expected") } if header.Size > sz { return read, xerrors.Errorf("tar file %#v is bigger than expected: %d > %d", header.Name, header.Size, sz) } out := filepath.Join(dir, header.Name) //nolint:gosec if !strings.HasPrefix(out, filepath.Clean(dir)) { return read, xerrors.Errorf("unsafe tar path %#v (must be within %#v)", out, filepath.Clean(dir)) } f, err := os.Create(out) if err != nil { return read, xerrors.Errorf("creating file %s: %w", out, err) } ltr := io.LimitReader(tr, header.Size) r, err := io.CopyBuffer(f, ltr, buf) read += r if err != nil { return read, err } if err := f.Close(); err != nil { return read, err } } } func TarDirectory(dir string, w io.Writer, buf []byte) error { tw := tar.NewWriter(w) files, err := os.ReadDir(dir) if err != nil { return err } for _, file := range files { info, err := file.Info() if err != nil { return xerrors.Errorf("getting file info for file %s: %w", file.Name(), err) } h, err := tar.FileInfoHeader(info, "") if err != nil { return xerrors.Errorf("getting header for file %s: %w", file.Name(), err) } if err := tw.WriteHeader(h); err != nil { return xerrors.Errorf("wiritng header for file %s: %w", file.Name(), err) } f, err := os.OpenFile(filepath.Join(dir, file.Name()), os.O_RDONLY, 644) // nolint if err != nil { return xerrors.Errorf("opening %s for reading: %w", file.Name(), err) } if _, err := io.CopyBuffer(tw, f, buf); err != nil { return xerrors.Errorf("copy data for file %s: %w", file.Name(), err) } if err := f.Close(); err != nil { return err } } return nil }