Move OpenDir to fs_dir.go

1 files changed, 66 insertions, 0 deletions

diff --git a/internal/fusefrontend/fs_dir.go b/internal/fusefrontend/fs_dir.go
index aed501d..f1ade25 100644
--- a/internal/fusefrontend/fs_dir.go
+++ b/internal/fusefrontend/fs_dir.go
@@ -155,3 +155,69 @@ func (fs *FS) Rmdir(name string, context *fuse.Context) (code fuse.Status) {
 	fs.nameTransform.DirIVCache.Clear()
 	return fuse.OK
 }
+
+func (fs *FS) OpenDir(dirName string, context *fuse.Context) ([]fuse.DirEntry, fuse.Status) {
+	toggledlog.Debug.Printf("OpenDir(%s)", dirName)
+	cDirName, err := fs.encryptPath(dirName)
+	if err != nil {
+		return nil, fuse.ToStatus(err)
+	}
+	// Read ciphertext directory
+	cipherEntries, status := fs.FileSystem.OpenDir(cDirName, context)
+	if cipherEntries == nil {
+		return nil, status
+	}
+	// Get DirIV (stays nil if DirIV if off)
+	var cachedIV []byte
+	var cDirAbsPath string
+	if fs.args.DirIV {
+		// Read the DirIV once and use it for all later name decryptions
+		cDirAbsPath = filepath.Join(fs.args.Cipherdir, cDirName)
+		cachedIV, err = nametransform.ReadDirIV(cDirAbsPath)
+		if err != nil {
+			return nil, fuse.ToStatus(err)
+		}
+	}
+	// Filter and decrypt filenames
+	var plain []fuse.DirEntry
+	for i := range cipherEntries {
+		cName := cipherEntries[i].Name
+		if dirName == "" && cName == configfile.ConfDefaultName {
+			// silently ignore "gocryptfs.conf" in the top level dir
+			continue
+		}
+		if fs.args.DirIV && cName == nametransform.DirIVFilename {
+			// silently ignore "gocryptfs.diriv" everywhere if dirIV is enabled
+			continue
+		}
+
+		if fs.args.PlaintextNames {
+			plain = append(plain, cipherEntries[i])
+			continue
+		}
+
+		if fs.args.LongNames {
+			isLong := nametransform.IsLongName(cName)
+			if isLong == 1 {
+				cNameLong, err := nametransform.ReadLongName(filepath.Join(cDirAbsPath, cName))
+				if err != nil {
+					toggledlog.Warn.Printf("Could not read long name for file %s, skipping file", cName)
+					continue
+				}
+				cName = cNameLong
+			} else if isLong == 2 {
+				// ignore "gocryptfs.longname.*.name"
+				continue
+			}
+		}
+		name, err := fs.nameTransform.DecryptName(cName, cachedIV)
+		if err != nil {
+			toggledlog.Warn.Printf("Skipping invalid name '%s' in dir '%s': %s", cName, cDirName, err)
+			continue
+		}
+
+		cipherEntries[i].Name = name
+		plain = append(plain, cipherEntries[i])
+	}
+	return plain, status
+}