2015-09-03 19:27:07 +02:00
|
|
|
package main
|
|
|
|
|
|
|
|
import (
|
2015-09-13 23:12:56 +02:00
|
|
|
"io/ioutil"
|
2015-09-06 11:42:01 +02:00
|
|
|
"flag"
|
2015-09-05 11:49:05 +02:00
|
|
|
"fmt"
|
2015-09-06 12:12:14 +02:00
|
|
|
"os"
|
|
|
|
"path/filepath"
|
2015-09-08 00:54:24 +02:00
|
|
|
"time"
|
2015-09-13 23:06:38 +02:00
|
|
|
"encoding/hex"
|
2015-09-08 00:54:24 +02:00
|
|
|
|
|
|
|
"github.com/rfjakob/gocryptfs/cluefs_frontend"
|
|
|
|
"github.com/rfjakob/gocryptfs/pathfs_frontend"
|
2015-09-09 19:32:59 +02:00
|
|
|
"github.com/rfjakob/gocryptfs/cryptfs"
|
2015-09-08 00:54:24 +02:00
|
|
|
|
2015-09-13 23:06:38 +02:00
|
|
|
"golang.org/x/crypto/ssh/terminal"
|
|
|
|
|
2015-09-08 00:54:24 +02:00
|
|
|
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"
|
2015-09-03 19:27:07 +02:00
|
|
|
)
|
|
|
|
|
2015-09-05 11:49:05 +02:00
|
|
|
const (
|
2015-09-08 23:09:28 +02:00
|
|
|
USE_CLUEFS = false // Use cluefs or pathfs FUSE frontend
|
2015-09-14 22:56:59 +02:00
|
|
|
USE_OPENSSL = true // 3x speed increase compared to Go's built-in GCM
|
2015-09-08 00:54:24 +02:00
|
|
|
PATHFS_DEBUG = false
|
|
|
|
|
2015-09-05 11:49:05 +02:00
|
|
|
PROGRAM_NAME = "gocryptfs"
|
2015-09-06 11:42:01 +02:00
|
|
|
|
2015-09-08 23:09:28 +02:00
|
|
|
// Exit codes
|
2015-09-06 12:12:14 +02:00
|
|
|
ERREXIT_USAGE = 1
|
|
|
|
ERREXIT_NEWFS = 2
|
|
|
|
ERREXIT_MOUNT = 3
|
|
|
|
ERREXIT_SERVE = 4
|
2015-09-06 11:42:01 +02:00
|
|
|
ERREXIT_MOUNT2 = 5
|
2015-09-09 19:32:59 +02:00
|
|
|
ERREXIT_CIPHERDIR = 6
|
2015-09-13 17:55:07 +02:00
|
|
|
ERREXIT_INIT = 7
|
|
|
|
ERREXIT_LOADCONF = 8
|
2015-09-13 23:06:38 +02:00
|
|
|
ERREXIT_PASSWORD = 9
|
2015-09-05 11:49:05 +02:00
|
|
|
)
|
|
|
|
|
2015-09-14 22:56:59 +02:00
|
|
|
func initDir(dirArg string) {
|
|
|
|
dir, _ := filepath.Abs(dirArg)
|
|
|
|
|
|
|
|
if dirEmpty(dir) == false {
|
|
|
|
fmt.Printf("Error: Directory \"%s\" is not empty\n", dirArg)
|
|
|
|
os.Exit(ERREXIT_INIT)
|
|
|
|
}
|
|
|
|
|
|
|
|
confName := filepath.Join(dir, cryptfs.ConfDefaultName)
|
|
|
|
fmt.Printf("Choose a password for protecting your files.\n")
|
|
|
|
password := readPasswordTwice()
|
|
|
|
err := cryptfs.CreateConfFile(confName, password)
|
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
os.Exit(ERREXIT_INIT)
|
|
|
|
}
|
|
|
|
fmt.Printf("The filesystem is now ready for mounting.\n")
|
|
|
|
os.Exit(0)
|
|
|
|
}
|
|
|
|
|
2015-09-03 19:27:07 +02:00
|
|
|
func main() {
|
2015-09-04 20:31:06 +02:00
|
|
|
// Parse command line arguments
|
2015-09-09 19:32:59 +02:00
|
|
|
var debug bool
|
2015-09-13 17:55:07 +02:00
|
|
|
var init bool
|
2015-09-09 19:32:59 +02:00
|
|
|
flag.BoolVar(&debug, "debug", false, "Enable debug output")
|
2015-09-13 17:55:07 +02:00
|
|
|
flag.BoolVar(&init, "init", false, "Initialize encrypted directory")
|
2015-09-06 11:42:01 +02:00
|
|
|
flag.Parse()
|
2015-09-09 19:32:59 +02:00
|
|
|
if debug {
|
|
|
|
cryptfs.Debug.Enable()
|
|
|
|
cryptfs.Debug.Printf("Debug output enabled\n")
|
|
|
|
}
|
2015-09-13 17:55:07 +02:00
|
|
|
if init {
|
|
|
|
if flag.NArg() != 1 {
|
|
|
|
fmt.Printf("usage: %s --init CIPHERDIR\n", PROGRAM_NAME)
|
|
|
|
os.Exit(ERREXIT_USAGE)
|
|
|
|
}
|
2015-09-14 22:56:59 +02:00
|
|
|
initDir(flag.Arg(0))
|
2015-09-13 17:55:07 +02:00
|
|
|
}
|
2015-09-06 11:42:01 +02:00
|
|
|
if flag.NArg() < 2 {
|
|
|
|
fmt.Printf("usage: %s CIPHERDIR MOUNTPOINT\n", PROGRAM_NAME)
|
|
|
|
os.Exit(ERREXIT_USAGE)
|
2015-09-03 19:27:07 +02:00
|
|
|
}
|
2015-09-06 11:42:01 +02:00
|
|
|
cipherdir, _ := filepath.Abs(flag.Arg(0))
|
2015-09-08 00:54:24 +02:00
|
|
|
mountpoint, _ := filepath.Abs(flag.Arg(1))
|
2015-09-09 19:32:59 +02:00
|
|
|
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)
|
|
|
|
}
|
2015-09-06 11:42:01 +02:00
|
|
|
|
2015-09-13 17:55:07 +02:00
|
|
|
cfname := filepath.Join(cipherdir, cryptfs.ConfDefaultName)
|
2015-09-13 18:08:15 +02:00
|
|
|
_, err = os.Stat(cfname)
|
|
|
|
if err != nil {
|
|
|
|
fmt.Printf("Error: %s not found in CIPHERDIR\n", cryptfs.ConfDefaultName)
|
2015-09-13 23:06:38 +02:00
|
|
|
fmt.Printf("Please run \"%s --init %s\" first\n", PROGRAM_NAME, flag.Arg(0))
|
2015-09-13 18:08:15 +02:00
|
|
|
os.Exit(ERREXIT_LOADCONF)
|
|
|
|
}
|
2015-09-13 23:06:38 +02:00
|
|
|
|
|
|
|
fmt.Printf("Password: ")
|
|
|
|
password := readPassword()
|
|
|
|
fmt.Printf("\nDecrypting master key... ")
|
|
|
|
key, err := cryptfs.LoadConfFile(cfname, password)
|
2015-09-13 17:55:07 +02:00
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
os.Exit(ERREXIT_LOADCONF)
|
|
|
|
}
|
2015-09-13 23:06:38 +02:00
|
|
|
fmt.Printf("Success\n")
|
|
|
|
printMasterKey(key)
|
2015-09-08 00:54:24 +02:00
|
|
|
|
|
|
|
if USE_CLUEFS {
|
2015-09-13 21:47:18 +02:00
|
|
|
cluefsFrontend(key, cipherdir, mountpoint)
|
2015-09-08 00:54:24 +02:00
|
|
|
} else {
|
2015-09-13 21:47:18 +02:00
|
|
|
pathfsFrontend(key, cipherdir, mountpoint, debug)
|
2015-09-08 00:54:24 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-13 23:06:38 +02:00
|
|
|
// printMasterKey - remind the user that he should store the master key in
|
|
|
|
// a safe place
|
|
|
|
func printMasterKey(key []byte) {
|
|
|
|
h := hex.EncodeToString(key)
|
|
|
|
// Make it less scary by splitting it up in chunks
|
|
|
|
h = h[0:8] + "-" + h[8:16] + "-" + h[16:24] + "-" + h[24:32]
|
|
|
|
|
|
|
|
fmt.Printf(`
|
|
|
|
WARNING:
|
|
|
|
If the gocryptfs config file becomes corrupted or you ever
|
|
|
|
forget your password, there is only one hope for recovery:
|
|
|
|
The master key. Print it to a piece of paper and store it in a drawer.
|
|
|
|
|
|
|
|
Master key: %s
|
|
|
|
|
|
|
|
`, h)
|
|
|
|
}
|
|
|
|
|
|
|
|
func readPasswordTwice() string {
|
|
|
|
fmt.Printf("Password: ")
|
|
|
|
p1 := readPassword()
|
|
|
|
fmt.Printf("\nRepeat: ")
|
|
|
|
p2 := readPassword()
|
|
|
|
fmt.Printf("\n")
|
|
|
|
if p1 != p2 {
|
|
|
|
fmt.Printf("Passwords do not match\n")
|
|
|
|
os.Exit(ERREXIT_PASSWORD)
|
|
|
|
}
|
|
|
|
return p1
|
|
|
|
}
|
|
|
|
|
|
|
|
// Get password from terminal
|
|
|
|
func readPassword() string {
|
|
|
|
fd := int(os.Stdin.Fd())
|
|
|
|
p, err := terminal.ReadPassword(fd)
|
|
|
|
if err != nil {
|
|
|
|
fmt.Printf("Error: Could not read password: %s\n")
|
|
|
|
os.Exit(ERREXIT_PASSWORD)
|
|
|
|
}
|
|
|
|
return string(p)
|
|
|
|
}
|
|
|
|
|
2015-09-14 22:56:59 +02:00
|
|
|
func dirEmpty(dir string) bool {
|
2015-09-13 23:12:56 +02:00
|
|
|
entries, err := ioutil.ReadDir(dir)
|
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
os.Exit(ERREXIT_CIPHERDIR)
|
|
|
|
}
|
2015-09-14 22:56:59 +02:00
|
|
|
if len(entries) == 0 {
|
|
|
|
return true
|
2015-09-13 23:12:56 +02:00
|
|
|
}
|
2015-09-14 22:56:59 +02:00
|
|
|
return false
|
2015-09-13 23:12:56 +02:00
|
|
|
}
|
|
|
|
|
2015-09-13 21:47:18 +02:00
|
|
|
func cluefsFrontend(key []byte, cipherdir string, mountpoint string) {
|
2015-09-08 00:54:24 +02:00
|
|
|
cfs, err := cluefs_frontend.NewFS(key, cipherdir, USE_OPENSSL)
|
2015-09-06 11:42:01 +02:00
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
|
|
|
os.Exit(ERREXIT_NEWFS)
|
|
|
|
}
|
2015-09-03 19:27:07 +02:00
|
|
|
|
2015-09-05 11:49:05 +02:00
|
|
|
// Mount the file system
|
2015-09-08 00:54:24 +02:00
|
|
|
mountOpts := []bazilfuse.MountOption{
|
|
|
|
bazilfuse.FSName(PROGRAM_NAME),
|
|
|
|
bazilfuse.Subtype(PROGRAM_NAME),
|
|
|
|
bazilfuse.VolumeName(PROGRAM_NAME),
|
|
|
|
bazilfuse.LocalVolume(),
|
|
|
|
bazilfuse.MaxReadahead(1024 * 1024),
|
2015-09-05 11:49:05 +02:00
|
|
|
}
|
2015-09-08 00:54:24 +02:00
|
|
|
conn, err := bazilfuse.Mount(mountpoint, mountOpts...)
|
2015-09-05 11:49:05 +02:00
|
|
|
if err != nil {
|
|
|
|
fmt.Println(err)
|
2015-09-06 11:42:01 +02:00
|
|
|
os.Exit(ERREXIT_MOUNT)
|
2015-09-05 11:49:05 +02:00
|
|
|
}
|
|
|
|
defer conn.Close()
|
|
|
|
|
|
|
|
// Start serving requests
|
2015-09-08 00:54:24 +02:00
|
|
|
if err = bazilfusefs.Serve(conn, cfs); err != nil {
|
2015-09-05 11:49:05 +02:00
|
|
|
fmt.Println(err)
|
2015-09-06 11:42:01 +02:00
|
|
|
os.Exit(ERREXIT_SERVE)
|
2015-09-05 11:49:05 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
// Check for errors when mounting the file system
|
|
|
|
<-conn.Ready
|
|
|
|
if err = conn.MountError; err != nil {
|
|
|
|
fmt.Println(err)
|
2015-09-06 11:42:01 +02:00
|
|
|
os.Exit(ERREXIT_MOUNT2)
|
2015-09-03 19:27:07 +02:00
|
|
|
}
|
|
|
|
|
2015-09-04 20:31:06 +02:00
|
|
|
// We are done
|
|
|
|
os.Exit(0)
|
2015-09-03 19:27:07 +02:00
|
|
|
}
|
2015-09-08 00:54:24 +02:00
|
|
|
|
2015-09-13 21:47:18 +02:00
|
|
|
func pathfsFrontend(key []byte, cipherdir string, mountpoint string, debug bool){
|
2015-09-08 00:54:24 +02:00
|
|
|
|
|
|
|
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)
|
|
|
|
}
|
2015-09-09 19:32:59 +02:00
|
|
|
state.SetDebug(debug)
|
2015-09-08 00:54:24 +02:00
|
|
|
|
2015-09-13 23:06:38 +02:00
|
|
|
fmt.Println("Mounted.")
|
2015-09-08 00:54:24 +02:00
|
|
|
state.Serve()
|
|
|
|
}
|