reverse: resolve long names in Open and GetAttr

The last patch added functionality for generating gocryptfs.longname.*
files, this patch adds support for mapping them back to the full
filenames.

Note that resolving a long name needs a full readdir. A cache
will be implemented later on to improve performance.

1 files changed, 0 insertions, 42 deletions

diff --git a/internal/fusefrontend_reverse/diriv.go b/internal/fusefrontend_reverse/diriv.go
deleted file mode 100644
index c4a93e4..0000000
--- a/internal/fusefrontend_reverse/diriv.go
+++ /dev/null
@@ -1,42 +0,0 @@
-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 directory path by simply hashing it
-func deriveDirIV(dirPath string) []byte {
-	hash := sha256.Sum256([]byte(dirPath))
-	return hash[:nametransform.DirIVLen]
-}
-
-type dirIVFile struct {
-	// Embed nodefs.defaultFile for a ENOSYS implementation of all methods
-	nodefs.File
-	// file content
-	content []byte
-}
-
-func NewDirIVFile(dirPath string) (nodefs.File, fuse.Status) {
-	return &dirIVFile{
-		File:    nodefs.NewDefaultFile(),
-		content: deriveDirIV(dirPath),
-	}, fuse.OK
-}
-
-// Read - FUSE call
-func (f *dirIVFile) Read(buf []byte, off int64) (resultData fuse.ReadResult, status fuse.Status) {
-	if off >= int64(len(f.content)) {
-		return nil, fuse.OK
-	}
-	end := int(off) + len(buf)
-	if end > len(f.content) {
-		end = len(f.content)
-	}
-	return fuse.ReadResultData(f.content[off:end]), fuse.OK
-}