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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/rfjakob/gocryptfs/v2/internal/configfile"
"github.com/rfjakob/gocryptfs/v2/internal/cryptocore"
"github.com/rfjakob/gocryptfs/v2/internal/exitcodes"
"github.com/rfjakob/gocryptfs/v2/internal/fido2"
"github.com/rfjakob/gocryptfs/v2/internal/nametransform"
"github.com/rfjakob/gocryptfs/v2/internal/readpassword"
"github.com/rfjakob/gocryptfs/v2/internal/stupidgcm"
"github.com/rfjakob/gocryptfs/v2/internal/syscallcompat"
"github.com/rfjakob/gocryptfs/v2/internal/tlog"
)
// isEmptyDir checks if "dir" exists and is an empty directory.
// Returns an *os.PathError if Stat() on the path fails.
func isEmptyDir(dir string) error {
err := isDir(dir)
if err != nil {
return err
}
entries, err := ioutil.ReadDir(dir)
if err != nil {
return err
}
if len(entries) == 0 {
return nil
}
return fmt.Errorf("directory %s not empty", dir)
}
// isDir checks if "dir" exists and is a directory.
func isDir(dir string) error {
fi, err := os.Stat(dir)
if err != nil {
return err
}
if !fi.IsDir() {
return fmt.Errorf("%s is not a directory", dir)
}
return nil
}
// initDir handles "gocryptfs -init". It 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 need 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(exitcodes.Init)
}
} else {
err = isEmptyDir(args.cipherdir)
if err != nil {
tlog.Fatal.Printf("Invalid cipherdir: %v", err)
os.Exit(exitcodes.CipherDir)
}
if !args.xchacha && !stupidgcm.CpuHasAES() {
tlog.Info.Printf(tlog.ColorYellow +
"Notice: Your CPU does not have AES acceleration. Consider using -xchacha for better performance." +
tlog.ColorReset)
}
}
// Choose password for config file
if len(args.extpass) == 0 && args.fido2 == "" {
tlog.Info.Printf("Choose a password for protecting your files.")
}
{
var password []byte
var fido2CredentialID, fido2HmacSalt []byte
if args.fido2 != "" {
fido2CredentialID = fido2.Register(args.fido2, filepath.Base(args.cipherdir))
fido2HmacSalt = cryptocore.RandBytes(32)
password = fido2.Secret(args.fido2, fido2CredentialID, fido2HmacSalt)
} else {
// normal password entry
password = readpassword.Twice([]string(args.extpass), []string(args.passfile))
fido2CredentialID = nil
fido2HmacSalt = nil
}
creator := tlog.ProgramName + " " + GitVersion
err = configfile.Create(&configfile.CreateArgs{
Filename: args.config,
Password: password,
PlaintextNames: args.plaintextnames,
LogN: args.scryptn,
Creator: creator,
AESSIV: args.aessiv,
Fido2CredentialID: fido2CredentialID,
Fido2HmacSalt: fido2HmacSalt,
DeterministicNames: args.deterministic_names,
XChaCha20Poly1305: args.xchacha,
LongNameMax: args.longnamemax,
})
if err != nil {
tlog.Fatal.Println(err)
os.Exit(exitcodes.WriteConf)
}
for i := range password {
password[i] = 0
}
// password runs out of scope here
}
// Forward mode with filename encryption enabled needs a gocryptfs.diriv file
// in the root dir
if !args.plaintextnames && !args.reverse && !args.deterministic_names {
// Open cipherdir (following symlinks)
dirfd, err := syscall.Open(args.cipherdir, syscall.O_DIRECTORY|syscallcompat.O_PATH, 0)
if err == nil {
err = nametransform.WriteDirIVAt(dirfd)
syscall.Close(dirfd)
}
if err != nil {
tlog.Fatal.Println(err)
os.Exit(exitcodes.Init)
}
}
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)
}
|
