diff options
| -rw-r--r-- | internal/fusefrontend/root_node.go | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/internal/fusefrontend/root_node.go b/internal/fusefrontend/root_node.go index ab0cdcd..c82078d 100644 --- a/internal/fusefrontend/root_node.go +++ b/internal/fusefrontend/root_node.go @@ -2,7 +2,6 @@ package fusefrontend import ( "os" - "path/filepath" "strings" "sync" "syscall" @@ -210,70 +209,6 @@ func (rn *RootNode) openWriteOnlyFile(dirfd int, cName string, newFlags int) (rw return syscallcompat.Openat(dirfd, cName, newFlags, 0) } -// 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. -// -// Retries on EINTR. -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 = syscallcompat.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 - } - if rn.nameTransform.HaveBadnamePatterns() { - cName, err = rn.nameTransform.EncryptAndHashBadName(name, iv, dirfd) - } else { - 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 -} - // encryptSymlinkTarget: "data" is encrypted like file contents (GCM) // and base64-encoded. // The empty string encrypts to the empty string. |