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path: root/internal/fusefrontend/node_openbackingdir.go
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Diffstat (limited to 'internal/fusefrontend/node_openbackingdir.go')
-rw-r--r--internal/fusefrontend/node_openbackingdir.go68
1 files changed, 0 insertions, 68 deletions
diff --git a/internal/fusefrontend/node_openbackingdir.go b/internal/fusefrontend/node_openbackingdir.go
deleted file mode 100644
index 733c239..0000000
--- a/internal/fusefrontend/node_openbackingdir.go
+++ /dev/null
@@ -1,68 +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 (rn *RootNode) openBackingDir(relPath string) (dirfd int, cName string, err error) {
- dirRelPath := nametransform.Dir(relPath)
- // With PlaintextNames, we don't need to read DirIVs. Easy.
- if rn.args.PlaintextNames {
- dirfd, err = syscallcompat.OpenDirNofollow(rn.args.Cipherdir, dirRelPath)
- if err != nil {
- return -1, "", err
- }
- // If relPath is empty, cName is ".".
- cName = filepath.Base(relPath)
- return dirfd, cName, nil
- }
- // Open cipherdir (following symlinks)
- dirfd, err = syscall.Open(rn.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 = rn.nameTransform.EncryptAndHashName(name, iv)
- if err != nil {
- syscall.Close(dirfd)
- return -1, "", err
- }
- // Last part? We are done.
- if i == len(parts)-1 {
- 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
-}