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
|
package main
import (
"github.com/pquerna/otp"
"github.com/pquerna/otp/totp"
"bufio"
"bytes"
"fmt"
"image/png"
"io/ioutil"
"os"
)
func display(key *otp.Key, data []byte) {
fmt.Printf("Issuer: %s\n", key.Issuer())
fmt.Printf("Account Name: %s\n", key.AccountName())
fmt.Printf("Secret: %s\n", key.Secret())
fmt.Println("Writing PNG to qr-code.png....")
ioutil.WriteFile("qr-code.png", data, 0644)
fmt.Println("")
fmt.Println("Please add your TOTP to your OTP Application now!")
fmt.Println("")
}
func promptForPasscode() string {
reader := bufio.NewReader(os.Stdin)
fmt.Print("Enter Passcode: ")
text, _ := reader.ReadString('\n')
return text
}
func main() {
key, err := totp.Generate(totp.GenerateOpts{
Issuer: "Example.com",
AccountName: "alice@example.com",
})
if err != nil {
panic(err)
}
// Convert TOTP key into a PNG
var buf bytes.Buffer
img, err := key.Image(200, 200)
if err != nil {
panic(err)
}
png.Encode(&buf, img)
// display the QR code to the user.
display(key, buf.Bytes())
// Now Validate that the user's successfully added the passcode.
fmt.Println("Validating TOTP...")
passcode := promptForPasscode()
valid := totp.Validate(passcode, key.Secret())
if valid {
println("Valid passcode!")
os.Exit(0)
} else {
println("Invalid passocde!")
os.Exit(1)
}
}
|
