1 files changed, 0 insertions, 84 deletions
diff --git a/internal/fusefrontend/openbackingdir.go b/internal/fusefrontend/openbackingdir.go
deleted file mode 100644
index e9e10db..0000000
--- a/internal/fusefrontend/openbackingdir.go
+++ /dev/null
@@ -1,84 +0,0 @@
-package fusefrontend
-
-import (
-	"path/filepath"
-	"strings"
-	"syscall"
-
-	"github.com/rfjakob/gocryptfs/internal/nametransform"
-	"github.com/rfjakob/gocryptfs/internal/syscallcompat"
-)
-
-// openBackingDir opens the parent ciphertext directory of plaintext path
-// "relPath". It returns the dirfd (opened with O_PATH) and the encrypted
-// basename.
-//
-// The caller should then use Openat(dirfd, cName, ...) and friends.
-// For convenience, if relPath is "", cName is going to be ".".
-//
-// openBackingDir is secure against symlink races by using Openat and
-// ReadDirIVAt.
-func (fs *FS) openBackingDir(relPath string) (dirfd int, cName string, err error) {
-	dirRelPath := nametransform.Dir(relPath)
-	// With PlaintextNames, we don't need to read DirIVs. Easy.
-	if fs.args.PlaintextNames {
-		dirfd, err = syscallcompat.OpenDirNofollow(fs.args.Cipherdir, dirRelPath)
-		if err != nil {
-			return -1, "", err
-		}
-		// If relPath is empty, cName is ".".
-		cName = filepath.Base(relPath)
-		return dirfd, cName, nil
-	}
-	// Cache lookup
-	dirfd, iv := fs.dirCache.Lookup(dirRelPath)
-	if dirfd > 0 {
-		// If relPath is empty, cName is ".".
-		if relPath == "" {
-			return dirfd, ".", nil
-		}
-		name := filepath.Base(relPath)
-		cName, err = fs.nameTransform.EncryptAndHashName(name, iv)
-		if err != nil {
-			syscall.Close(dirfd)
-			return -1, "", err
-		}
-		return dirfd, cName, nil
-	}
-	// Open cipherdir (following symlinks)
-	dirfd, err = syscall.Open(fs.args.Cipherdir, syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
-	if err != nil {
-		return -1, "", err
-	}
-	// If relPath is empty, cName is ".".
-	if relPath == "" {
-		return dirfd, ".", nil
-	}
-	// Walk the directory tree
-	parts := strings.Split(relPath, "/")
-	for i, name := range parts {
-		iv, err := nametransform.ReadDirIVAt(dirfd)
-		if err != nil {
-			syscall.Close(dirfd)
-			return -1, "", err
-		}
-		cName, err = fs.nameTransform.EncryptAndHashName(name, iv)
-		if err != nil {
-			syscall.Close(dirfd)
-			return -1, "", err
-		}
-		// Last part? We are done.
-		if i == len(parts)-1 {
-			fs.dirCache.Store(dirRelPath, dirfd, iv)
-			break
-		}
-		// Not the last part? Descend into next directory.
-		dirfd2, err := syscallcompat.Openat(dirfd, cName, syscall.O_NOFOLLOW|syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
-		syscall.Close(dirfd)
-		if err != nil {
-			return -1, "", err
-		}
-		dirfd = dirfd2
-	}
-	return dirfd, cName, nil
-}