61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
package frontend
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import (
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"fmt"
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"github.com/rfjakob/gocryptfs/cryptfs"
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"github.com/rfjakob/cluefs/lib/cluefs"
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"bazil.org/fuse"
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fusefs "bazil.org/fuse/fs"
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"golang.org/x/net/context"
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)
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type File struct {
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*cluefs.File
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crfs *cryptfs.CryptFS
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}
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func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fusefs.Handle, error) {
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fmt.Printf("File.Open: f.crfs=%p\n", f.crfs)
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h, err := f.File.Open(ctx, req, resp)
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if err != nil {
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return nil, err
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}
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clueFile := h.(*cluefs.File)
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return &File {
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File: clueFile,
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crfs: f.crfs,
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}, nil
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}
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func (f *File) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
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fmt.Printf("File.Read: f.crfs=%p\n", f.crfs)
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iblocks := f.crfs.SplitRange(req.Offset, int64(req.Size))
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for _, ib := range iblocks {
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var partReq fuse.ReadRequest
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var partResp fuse.ReadResponse
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o, l := ib.CiphertextRange()
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partReq.Size = int(l)
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partResp.Data = make([]byte, int(l))
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partReq.Offset = o
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err := f.File.Read(ctx, &partReq, &partResp)
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if err != nil {
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return err
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}
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plaintext, err := f.crfs.DecryptBlock(partResp.Data)
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if err != nil {
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fmt.Printf("Read: Block %d: %s\n", ib.BlockNo, err.Error())
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return err
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}
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plaintext = ib.CropBlock(partResp.Data)
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resp.Data = append(resp.Data, plaintext...)
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}
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return nil
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}
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func (f *File) Write(ctx context.Context, req *fuse.WriteRequest, resp *fuse.WriteResponse) error {
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iblocks := f.crfs.SplitRange(req.Offset, int64(len(req.Data)))
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iblocks = iblocks
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return nil
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}
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