summaryrefslogtreecommitdiff
path: root/frontend
diff options
context:
space:
mode:
Diffstat (limited to 'frontend')
-rw-r--r--frontend/fe_checks.go31
-rw-r--r--frontend/fe_dir.go131
-rw-r--r--frontend/fe_file.go152
-rw-r--r--frontend/fe_fs.go46
4 files changed, 0 insertions, 360 deletions
diff --git a/frontend/fe_checks.go b/frontend/fe_checks.go
deleted file mode 100644
index 30720f6..0000000
--- a/frontend/fe_checks.go
+++ /dev/null
@@ -1,31 +0,0 @@
-package frontend
-
-import (
- "bazil.org/fuse/fs"
-)
-
-// Compile-time interface checks.
-var _ fs.FS = (*FS)(nil)
-var _ fs.FSStatfser = (*FS)(nil)
-
-var _ fs.Node = (*Dir)(nil)
-var _ fs.NodeCreater = (*Dir)(nil)
-var _ fs.NodeMkdirer = (*Dir)(nil)
-var _ fs.NodeRemover = (*Dir)(nil)
-var _ fs.NodeRenamer = (*Dir)(nil)
-var _ fs.HandleReadDirAller = (*Dir)(nil)
-
-var _ fs.HandleReader = (*File)(nil)
-var _ fs.HandleWriter = (*File)(nil)
-var _ fs.Node = (*File)(nil)
-var _ fs.NodeOpener = (*File)(nil)
-var _ fs.NodeSetattrer = (*File)(nil)
-
-func foo(h fs.HandleReadDirAller) {
-
-}
-
-func init() {
- var d Dir
- foo(&d)
-}
diff --git a/frontend/fe_dir.go b/frontend/fe_dir.go
deleted file mode 100644
index 9849968..0000000
--- a/frontend/fe_dir.go
+++ /dev/null
@@ -1,131 +0,0 @@
-package frontend
-
-// frontend sits between FUSE and ClueFS
-// and uses cryptfs for all crypto operations
-//
-// cryptfs
-// ^
-// |
-// v
-// FUSE <-> frontend <-> ClueFS
-//
-// This file handles directories
-
-import (
- "fmt"
- "github.com/rfjakob/gocryptfs/cryptfs"
- "github.com/rfjakob/cluefs/lib/cluefs"
- "bazil.org/fuse"
- fusefs "bazil.org/fuse/fs"
- "golang.org/x/net/context"
-)
-
-type Dir struct {
- *cluefs.Dir
-
- crfs *cryptfs.CryptFS
-}
-
-func NewDir(parent string, name string, fs *FS) *Dir {
- cryptfs.Debug.Printf("NewDir parent=%s name=%s\n", parent, name)
- return &Dir {
- Dir: cluefs.NewDir(parent, name, fs.ClueFS),
- crfs: fs.CryptFS,
- }
-}
-
-func (d *Dir) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fusefs.Handle, error) {
- cryptfs.Debug.Printf("Open\n")
- h, err := d.Dir.Open(ctx, req, resp)
- if err != nil {
- return nil, err
- }
- clueDir := h.(*cluefs.Dir)
-
- return &Dir {
- Dir: clueDir,
- crfs: d.crfs,
- }, nil
-}
-
-func (d *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (fusefs.Node, error) {
- cryptfs.Debug.Printf("Lookup %s\n", req.Name)
- req.Name = d.crfs.EncryptPath(req.Name)
- node, err := d.Dir.Lookup(ctx, req, resp)
- if err != nil {
- return nil, err
- }
- clueDir, ok := node.(*cluefs.Dir)
- if ok {
- return &Dir {
- Dir: clueDir,
- crfs: d.crfs,
- }, nil
- } else {
- resp.Attr.Size = d.crfs.PlainSize(resp.Attr.Size)
- clueFile := node.(*cluefs.File)
- return &File {
- File: clueFile,
- crfs: d.crfs,
- }, nil
- }
-}
-
-func (d *Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
- cryptfs.Debug.Printf("ReadDirAll\n")
- entries, err := d.Dir.ReadDirAll(ctx)
- if err != nil {
- return nil, err
- }
- var decrypted []fuse.Dirent
- for _, e := range entries {
- if e.Name == "." || e.Name == ".." {
- decrypted = append(decrypted, e)
- continue
- }
- newName, err := d.crfs.DecryptPath(e.Name)
- if err != nil {
- fmt.Printf("ReadDirAll: Error decoding \"%s\": %s\n", e.Name, err.Error())
- continue
- }
- e.Name = newName
- decrypted = append(decrypted, e)
- }
- return decrypted, nil
-}
-
-func (d *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fusefs.Node, error) {
- cryptfs.Debug.Printf("Mkdir %s\n", req.Name)
- req.Name = d.crfs.EncryptPath(req.Name)
- n, err := d.Dir.Mkdir(ctx, req)
- if err != nil {
- return nil, err
- }
- clueDir := n.(*cluefs.Dir)
- return &Dir {
- Dir: clueDir,
- crfs: d.crfs,
- }, nil
-}
-
-func (d *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
- cryptfs.Debug.Printf("Remove\n")
- req.Name = d.crfs.EncryptPath(req.Name)
- return d.Dir.Remove(ctx, req)
-}
-
-func (d *Dir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fusefs.Node, fusefs.Handle, error) {
- cryptfs.Debug.Printf("Create\n")
- req.Flags, _ = fixFlags(req.Flags)
- req.Name = d.crfs.EncryptPath(req.Name)
- n, _, err := d.Dir.Create(ctx, req, resp)
- if err != nil {
- return nil, nil, err
- }
- clueFile := n.(*cluefs.File)
- cryptFile := &File {
- File: clueFile,
- crfs: d.crfs,
- }
- return cryptFile, cryptFile, nil
-}
diff --git a/frontend/fe_file.go b/frontend/fe_file.go
deleted file mode 100644
index 4679589..0000000
--- a/frontend/fe_file.go
+++ /dev/null
@@ -1,152 +0,0 @@
-package frontend
-
-// frontend sits between FUSE and ClueFS
-// and uses cryptfs for all crypto operations
-//
-// cryptfs
-// ^
-// |
-// v
-// FUSE <-> frontend <-> ClueFS
-//
-// This file handles files access
-
-import (
- "fmt"
- "github.com/rfjakob/gocryptfs/cryptfs"
- "github.com/rfjakob/cluefs/lib/cluefs"
-
- "bazil.org/fuse"
- fusefs "bazil.org/fuse/fs"
- "golang.org/x/net/context"
-)
-
-func fixFlags(flags fuse.OpenFlags) (fuse.OpenFlags, bool) {
- cryptfs.Debug.Printf("fixFlags: Before: %s\n", flags.String())
- var writeOnly bool
- // We always need read access to do read-modify-write cycles
- if flags & fuse.OpenWriteOnly > 0 {
- flags = flags &^ fuse.OpenWriteOnly
- flags = flags | fuse.OpenReadWrite
- writeOnly = true
- }
- // We also cannot open the file in append mode, we need to seek back for RMW
- flags = flags &^ fuse.OpenAppend
- cryptfs.Debug.Printf("fixFlags: After: %s\n", flags.String())
- return flags, writeOnly
-}
-
-func max(x int, y int) int {
- if x > y {
- return x
- }
- return y
-}
-
-type File struct {
- *cluefs.File
- crfs *cryptfs.CryptFS
- // Remember if the file is supposed to be write-only
- writeOnly bool
-}
-
-func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fusefs.Handle, error) {
- cryptfs.Debug.Printf("File.Open\n")
-
- req.Flags, f.writeOnly = fixFlags(req.Flags)
-
- h, err := f.File.Open(ctx, req, resp)
- if err != nil {
- return nil, err
- }
- clueFile := h.(*cluefs.File)
- return &File {
- File: clueFile,
- crfs: f.crfs,
- }, nil
-}
-
-func (f *File) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
-
- cryptfs.Debug.Printf("Read: o=%d l=%d\n", req.Offset, req.Size)
-
- // Read the backing ciphertext in one go
- iblocks := f.crfs.SplitRange(uint64(req.Offset), uint64(req.Size))
- var cipherReq fuse.ReadRequest
- var cipherResp fuse.ReadResponse
- o, l := f.crfs.JoinCiphertextRange(iblocks)
- cipherResp.Data = make([]byte, int(l))
- cipherReq.Offset = int64(o)
- cipherReq.Size = int(l)
- cryptfs.Debug.Printf("Read: cipherReq o=%d l=%d\n", o, l)
- err := f.File.Read(ctx, &cipherReq, &cipherResp)
- if err != nil {
- return err
- }
-
- // Decrypt it
- plaintext, err := f.crfs.DecryptBlocks(cipherResp.Data)
- if err != nil {
- resp.Data = plaintext
- return err
- }
- // Crop down to relevant part
- resp.Data = f.crfs.CropPlaintext(plaintext, iblocks)
-
- return nil
-}
-
-func (f *File) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
- cryptfs.Debug.Printf("File.Write\n")
- resp.Size = 0
- iblocks := f.crfs.SplitRange(uint64(req.Offset), uint64(len(req.Data)))
- var blockData []byte
- for _, ib := range iblocks {
- if ib.IsPartial() {
- // RMW
- cryptfs.Debug.Printf("RMW\n")
- blockData = make([]byte, f.crfs.PlainBS())
- var readReq fuse.ReadRequest
- var readResp fuse.ReadResponse
- o, l := ib.PlaintextRange()
- readReq.Offset = int64(o)
- readReq.Size = int(l)
- err := f.Read(ctx, &readReq, &readResp)
- if err != nil {
- return err
- }
- copy(blockData, readResp.Data)
- copy(blockData[ib.Offset:ib.Offset+ib.Length], req.Data)
- blockLen := max(len(readResp.Data), int(ib.Offset+ib.Length))
- blockData = blockData[0:blockLen]
- } else {
- blockData = req.Data[0:f.crfs.PlainBS()]
- }
- ciphertext := f.crfs.EncryptBlock(blockData)
- var partReq fuse.WriteRequest
- var partResp fuse.WriteResponse
- o, _ := ib.CiphertextRange()
- partReq.Data = ciphertext
- partReq.Offset = int64(o)
- err := f.File.Write(ctx, &partReq, &partResp)
- if err != nil {
- fmt.Printf("Write failure: %s\n", err.Error())
- return err
- }
- // Remove written data from the front of the request
- cryptfs.Debug.Printf("req.Data[%d:%d]\n", int(ib.Length), len(req.Data))
- req.Data = req.Data[int(ib.Length):len(req.Data)]
- resp.Size += int(ib.Length)
- }
- return nil
-}
-
-func (f *File) Attr(ctx context.Context, attr *fuse.Attr) error {
- cryptfs.Debug.Printf("Attr\n")
- err := f.File.Node.Attr(ctx, attr)
- if err != nil {
- return err
- }
- attr.Size = f.crfs.PlainSize(attr.Size)
- return nil
-}
diff --git a/frontend/fe_fs.go b/frontend/fe_fs.go
deleted file mode 100644
index d1fa5b1..0000000
--- a/frontend/fe_fs.go
+++ /dev/null
@@ -1,46 +0,0 @@
-package frontend
-
-// frontend sits between FUSE and ClueFS
-// and uses cryptfs for all crypto operations
-//
-// cryptfs
-// ^
-// |
-// v
-// FUSE <-> frontend <-> ClueFS
-//
-// This file handles just the root directory
-
-import (
- "github.com/rfjakob/gocryptfs/cryptfs"
- "github.com/rfjakob/cluefs/lib/cluefs"
- fusefs "bazil.org/fuse/fs"
-)
-
-type FS struct {
- *cryptfs.CryptFS
- *cluefs.ClueFS
- backing string
-}
-
-type nullTracer struct {}
-
-func (nullTracer) Trace(op cluefs.FsOperTracer) {}
-
-func NewFS(key [16]byte, backing string, useOpenssl bool) (*FS, error) {
- var tracer nullTracer
- clfs, err := cluefs.NewClueFS(backing, tracer)
- if err != nil {
- return nil, err
- }
- return &FS {
- CryptFS: cryptfs.NewCryptFS(key, useOpenssl),
- ClueFS: clfs,
- backing: backing,
- }, nil
-}
-
-func (fs *FS) Root() (fusefs.Node, error) {
- cryptfs.Debug.Printf("Root\n")
- return NewDir("", fs.backing, fs), nil
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 14:44:14 +0000