// initDir prepares a directory for use as a gocryptfs storage directory.
// In forward mode, this means creating the gocryptfs.conf and gocryptfs.diriv
// files in an empty directory.
// In reverse mode, we create .gocryptfs.reverse.conf and the directory does
// not to be empty.
func initDir(args *argContainer) {
var err error
if args.reverse {
_, err = os.Stat(args.config)
if err == nil {
tlog.Fatal.Printf("Config file %q already exists", args.config)
os.Exit(ErrExitInit)
}
} else {
err = checkDirEmpty(args.cipherdir)
if err != nil {
tlog.Fatal.Printf("Invalid cipherdir: %v", err)
os.Exit(ErrExitInit)
}
}
// Choose password for config file
if args.extpass == "" {
tlog.Info.Printf("Choose a password for protecting your files.")
}
password := readpassword.Twice(args.extpass)
creator := tlog.ProgramName + " " + GitVersion
err = configfile.CreateConfFile(args.config, password, args.plaintextnames, args.scryptn, creator, args.aessiv, args.raw64)
if err != nil {
tlog.Fatal.Println(err)
os.Exit(ErrExitInit)
}
// Forward mode with filename encryption enabled needs a gocryptfs.diriv
// in the root dir
if !args.plaintextnames && !args.reverse {
err = nametransform.WriteDirIV(args.cipherdir)
if err != nil {
tlog.Fatal.Println(err)
os.Exit(ErrExitInit)
}
}
mountArgs := ""
fsName := "gocryptfs"
if args.reverse {
mountArgs = " -reverse"
fsName = "gocryptfs-reverse"
}
tlog.Info.Printf(tlog.ColorGreen+"The %s filesystem has been created successfully."+tlog.ColorReset,
fsName)
wd, _ := os.Getwd()
friendlyPath, _ := filepath.Rel(wd, args.cipherdir)
if strings.HasPrefix(friendlyPath, "../") {
// A relative path that starts with "../" is pretty unfriendly, just
// keep the absolute path.
friendlyPath = args.cipherdir
}
if strings.Contains(friendlyPath, " ") {
friendlyPath = "\"" + friendlyPath + "\""
}
tlog.Info.Printf(tlog.ColorGrey+"You can now mount it using: %s%s %s MOUNTPOINT"+tlog.ColorReset,
tlog.ProgramName, mountArgs, friendlyPath)
os.Exit(0)
}
// ResetTmpDir deletes TmpDir, create new dir tree:
//
// TmpDir
// |-- DefaultPlainDir
// *-- DefaultCipherDir
// *-- gocryptfs.diriv
func ResetTmpDir(createDirIV bool) {
// Try to unmount and delete everything
entries, err := ioutil.ReadDir(TmpDir)
if err == nil {
for _, e := range entries {
d := filepath.Join(TmpDir, e.Name())
err = os.Remove(d)
if err != nil {
pe := err.(*os.PathError)
if pe.Err == syscall.EBUSY {
if testing.Verbose() {
fmt.Printf("Remove failed: %v. Maybe still mounted?\n", pe)
}
err = UnmountErr(d)
if err != nil {
panic(err)
}
} else if pe.Err != syscall.ENOTEMPTY {
panic("Unhandled error: " + pe.Err.Error())
}
err = os.RemoveAll(d)
if err != nil {
panic(err)
}
}
}
}
err = os.Mkdir(DefaultPlainDir, 0700)
if err != nil {
panic(err)
}
err = os.Mkdir(DefaultCipherDir, 0700)
if err != nil {
panic(err)
}
if createDirIV {
err = nametransform.WriteDirIV(DefaultCipherDir)
if err != nil {
panic(err)
}
}
}
func (fs *FS) mkdirWithIv(cPath string, mode uint32) error {
// Between the creation of the directory and the creation of gocryptfs.diriv
// the directory is inconsistent. Take the lock to prevent other readers
// from seeing it.
fs.dirIVLock.Lock()
// The new directory may take the place of an older one that is still in the cache
fs.nameTransform.DirIVCache.Clear()
defer fs.dirIVLock.Unlock()
err := os.Mkdir(cPath, os.FileMode(mode))
if err != nil {
return err
}
// Create gocryptfs.diriv
err = nametransform.WriteDirIV(cPath)
if err != nil {
err2 := syscall.Rmdir(cPath)
if err2 != nil {
tlog.Warn.Printf("mkdirWithIv: rollback failed: %v", err2)
}
}
return err
}