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-rw-r--r--internal/nametransform/diriv.go11
1 files changed, 7 insertions, 4 deletions
diff --git a/internal/nametransform/diriv.go b/internal/nametransform/diriv.go
index 11bd729..66548f1 100644
--- a/internal/nametransform/diriv.go
+++ b/internal/nametransform/diriv.go
@@ -24,13 +24,12 @@ const (
// ReadDirIV - read the "gocryptfs.diriv" file from "dir" (absolute ciphertext path)
// This function is exported because it allows for an efficient readdir implementation.
func ReadDirIV(dir string) (iv []byte, err error) {
- dirfd, err := os.Open(dir)
+ fd, err := os.Open(filepath.Join(dir, DirIVFilename))
if err != nil {
return nil, err
}
- defer dirfd.Close()
-
- return ReadDirIVAt(dirfd)
+ defer fd.Close()
+ return fdReadDirIV(fd)
}
// ReadDirIVAt reads "gocryptfs.diriv" from the directory that is opened as "dirfd".
@@ -44,7 +43,11 @@ func ReadDirIVAt(dirfd *os.File) (iv []byte, err error) {
}
fd := os.NewFile(uintptr(fdRaw), DirIVFilename)
defer fd.Close()
+ return fdReadDirIV(fd)
+}
+// fdReadDirIV reads and verifies the DirIV from an opened gocryptfs.diriv file.
+func fdReadDirIV(fd *os.File) (iv []byte, err error) {
// We want to detect if the file is bigger than DirIVLen, so
// make the buffer 1 byte bigger than neccessary.
iv = make([]byte, DirIVLen+1)