summaryrefslogtreecommitdiff
path: root/main.go
blob: 70f0b53c793b6faaf60106c1b808b7fe3e56c6e4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
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
)

func main() {
	// Parse command line arguments
	var debug bool
	flag.BoolVar(&debug, "debug", false, "Enable debug output")
	flag.Parse()
	if debug {
		cryptfs.Debug.Enable()
		cryptfs.Debug.Printf("Debug output enabled\n")
	}
	if flag.NArg() < 2 {
		fmt.Printf("NArg=%d\n", flag.NArg())
		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)
	}

	var key [16]byte

	if USE_CLUEFS {
		cluefsFrontend(key, cipherdir, mountpoint)
	} else {
		pathfsFrontend(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()
}