aboutsummaryrefslogtreecommitdiff
path: root/internal/fusefrontend_reverse/reverse_diriv.go
diff options
context:
space:
mode:
Diffstat (limited to 'internal/fusefrontend_reverse/reverse_diriv.go')
-rw-r--r--internal/fusefrontend_reverse/reverse_diriv.go26
1 files changed, 26 insertions, 0 deletions
diff --git a/internal/fusefrontend_reverse/reverse_diriv.go b/internal/fusefrontend_reverse/reverse_diriv.go
new file mode 100644
index 0000000..df3a4d1
--- /dev/null
+++ b/internal/fusefrontend_reverse/reverse_diriv.go
@@ -0,0 +1,26 @@
+package fusefrontend_reverse
+
+import (
+ "crypto/sha256"
+
+ "github.com/hanwen/go-fuse/fuse"
+ "github.com/hanwen/go-fuse/fuse/nodefs"
+
+ "github.com/rfjakob/gocryptfs/internal/nametransform"
+)
+
+// deriveDirIV derives the DirIV from the encrypted directory path by
+// hashing it
+func deriveDirIV(dirPath string) []byte {
+ hash := sha256.Sum256([]byte(dirPath))
+ return hash[:nametransform.DirIVLen]
+}
+
+func (rfs *reverseFS) newDirIVFile(cRelPath string) (nodefs.File, fuse.Status) {
+ cDir := saneDir(cRelPath)
+ absDir, err := rfs.abs(rfs.decryptPath(cDir))
+ if err != nil {
+ return nil, fuse.ToStatus(err)
+ }
+ return rfs.NewVirtualFile(deriveDirIV(cDir), absDir)
+}