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package main
import (
"flag"
"fmt"
"os"
"path/filepath"
"time"
"github.com/rfjakob/gocryptfs/cluefs_frontend"
"github.com/rfjakob/gocryptfs/pathfs_frontend"
"github.com/rfjakob/gocryptfs/cryptfs"
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"
)
const (
USE_CLUEFS = false // Use cluefs or pathfs FUSE frontend
USE_OPENSSL = true // 3x speed increase
PATHFS_DEBUG = false
PROGRAM_NAME = "gocryptfs"
// Exit codes
ERREXIT_USAGE = 1
ERREXIT_NEWFS = 2
ERREXIT_MOUNT = 3
ERREXIT_SERVE = 4
ERREXIT_MOUNT2 = 5
ERREXIT_CIPHERDIR = 6
ERREXIT_INIT = 7
ERREXIT_LOADCONF = 8
)
func main() {
// Parse command line arguments
var debug bool
var init bool
flag.BoolVar(&debug, "debug", false, "Enable debug output")
flag.BoolVar(&init, "init", false, "Initialize encrypted directory")
flag.Parse()
if debug {
cryptfs.Debug.Enable()
cryptfs.Debug.Printf("Debug output enabled\n")
}
if init {
if flag.NArg() != 1 {
fmt.Printf("usage: %s --init CIPHERDIR\n", PROGRAM_NAME)
os.Exit(ERREXIT_USAGE)
}
dir, _ := filepath.Abs(flag.Arg(0))
filename := filepath.Join(dir, cryptfs.ConfDefaultName)
r := cryptfs.RandBytes(cryptfs.KEY_LEN)
var key [16]byte
copy(key[:], r)
err := cryptfs.CreateConfFile(filename, key)
if err != nil {
fmt.Println(err)
os.Exit(ERREXIT_INIT)
}
os.Exit(0)
}
if flag.NArg() < 2 {
fmt.Printf("usage: %s CIPHERDIR MOUNTPOINT\n", PROGRAM_NAME)
os.Exit(ERREXIT_USAGE)
}
cipherdir, _ := filepath.Abs(flag.Arg(0))
mountpoint, _ := filepath.Abs(flag.Arg(1))
cryptfs.Debug.Printf("cipherdir=%s\nmountpoint=%s\n", cipherdir, mountpoint)
_, err := os.Stat(cipherdir)
if err != nil {
fmt.Printf("Cipherdir: %s\n", err.Error())
os.Exit(ERREXIT_CIPHERDIR)
}
cfname := filepath.Join(cipherdir, cryptfs.ConfDefaultName)
_, err = os.Stat(cfname)
if err != nil {
fmt.Printf("Error: %s not found in CIPHERDIR\n", cryptfs.ConfDefaultName)
fmt.Printf("Please run \"%s --init %s\" first\n", PROGRAM_NAME, cipherdir)
os.Exit(ERREXIT_LOADCONF)
}
cf, err := cryptfs.LoadConfFile(cfname)
if err != nil {
fmt.Println(err)
os.Exit(ERREXIT_LOADCONF)
}
if USE_CLUEFS {
cluefsFrontend(cf.Key, cipherdir, mountpoint)
} else {
pathfsFrontend(cf.Key, cipherdir, mountpoint, debug)
}
}
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)
}
// 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),
}
conn, err := bazilfuse.Mount(mountpoint, mountOpts...)
if err != nil {
fmt.Println(err)
os.Exit(ERREXIT_MOUNT)
}
defer conn.Close()
// Start serving requests
if err = bazilfusefs.Serve(conn, cfs); err != nil {
fmt.Println(err)
os.Exit(ERREXIT_SERVE)
}
// Check for errors when mounting the file system
<-conn.Ready
if err = conn.MountError; err != nil {
fmt.Println(err)
os.Exit(ERREXIT_MOUNT2)
}
// We are done
os.Exit(0)
}
func pathfsFrontend(key [16]byte, cipherdir string, mountpoint string, debug bool){
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(debug)
fmt.Println("Mounted!")
state.Serve()
}
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