libgocryptfs/main.go

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package main
import (
"flag"
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"fmt"
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"os"
"path/filepath"
"time"
"github.com/rfjakob/gocryptfs/cluefs_frontend"
"github.com/rfjakob/gocryptfs/pathfs_frontend"
bazilfuse "bazil.org/fuse"
bazilfusefs "bazil.org/fuse/fs"
"github.com/hanwen/go-fuse/fuse"
"github.com/hanwen/go-fuse/fuse/nodefs"
"github.com/hanwen/go-fuse/fuse/pathfs"
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)
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const (
USE_CLUEFS = false // Use cluefs or pathfs FUSE frontend
USE_OPENSSL = true // 3x speed increase
PATHFS_DEBUG = false
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PROGRAM_NAME = "gocryptfs"
// Exit codes
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ERREXIT_USAGE = 1
ERREXIT_NEWFS = 2
ERREXIT_MOUNT = 3
ERREXIT_SERVE = 4
ERREXIT_MOUNT2 = 5
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)
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func main() {
// Parse command line arguments
flag.Parse()
if flag.NArg() < 2 {
fmt.Printf("NArg=%d\n", flag.NArg())
fmt.Printf("usage: %s CIPHERDIR MOUNTPOINT\n", PROGRAM_NAME)
os.Exit(ERREXIT_USAGE)
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}
cipherdir, _ := filepath.Abs(flag.Arg(0))
mountpoint, _ := filepath.Abs(flag.Arg(1))
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var key [16]byte
if USE_CLUEFS {
cluefsFrontend(key, cipherdir, mountpoint)
} else {
pathfsFrontend(key, cipherdir, mountpoint)
}
}
func cluefsFrontend(key [16]byte, cipherdir string, mountpoint string) {
cfs, err := cluefs_frontend.NewFS(key, cipherdir, USE_OPENSSL)
if err != nil {
fmt.Println(err)
os.Exit(ERREXIT_NEWFS)
}
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// Mount the file system
mountOpts := []bazilfuse.MountOption{
bazilfuse.FSName(PROGRAM_NAME),
bazilfuse.Subtype(PROGRAM_NAME),
bazilfuse.VolumeName(PROGRAM_NAME),
bazilfuse.LocalVolume(),
bazilfuse.MaxReadahead(1024 * 1024),
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}
conn, err := bazilfuse.Mount(mountpoint, mountOpts...)
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if err != nil {
fmt.Println(err)
os.Exit(ERREXIT_MOUNT)
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}
defer conn.Close()
// Start serving requests
if err = bazilfusefs.Serve(conn, cfs); err != nil {
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fmt.Println(err)
os.Exit(ERREXIT_SERVE)
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}
// Check for errors when mounting the file system
<-conn.Ready
if err = conn.MountError; err != nil {
fmt.Println(err)
os.Exit(ERREXIT_MOUNT2)
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}
// We are done
os.Exit(0)
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}
func pathfsFrontend(key [16]byte, cipherdir string, mountpoint string){
finalFs := pathfs_frontend.NewFS(key, cipherdir, USE_OPENSSL)
opts := &nodefs.Options{
// These options are to be compatible with libfuse defaults,
// making benchmarking easier.
NegativeTimeout: time.Second,
AttrTimeout: time.Second,
EntryTimeout: time.Second,
}
pathFs := pathfs.NewPathNodeFs(finalFs, nil)
conn := nodefs.NewFileSystemConnector(pathFs.Root(), opts)
mOpts := &fuse.MountOptions{
AllowOther: false,
}
state, err := fuse.NewServer(conn.RawFS(), mountpoint, mOpts)
if err != nil {
fmt.Printf("Mount fail: %v\n", err)
os.Exit(1)
}
state.SetDebug(PATHFS_DEBUG)
fmt.Println("Mounted!")
state.Serve()
}