/
mfa.go
39 lines (34 loc) · 919 Bytes
/
mfa.go
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
package mfa
import (
"bytes"
"encoding/base64"
"github.com/skip2/go-qrcode"
"github.com/xlzd/gotp"
"strconv"
"time"
)
const secretLength = 16
type Otp struct {
Secret string `json:"secret"`
QrImage string `json:"qrImage"`
}
func GetOtp(username string) (otp Otp, err error) {
secret := gotp.RandomSecret(secretLength)
otp.Secret = secret
totp := gotp.NewDefaultTOTP(secret)
uri := totp.ProvisioningUri(username, "KubePi")
subImg, err := qrcode.Encode(uri, qrcode.Medium, 256)
dist := make([]byte, 3000)
base64.StdEncoding.Encode(dist, subImg)
index := bytes.IndexByte(dist, 0)
baseImage := dist[0:index]
otp.QrImage = "data:image/png;base64," + string(baseImage)
return
}
func ValidCode(code string, secret string) bool {
totp := gotp.NewDefaultTOTP(secret)
now := time.Now().Unix()
strInt64 := strconv.FormatInt(now, 10)
id16, _ := strconv.Atoi(strInt64)
return totp.Verify(code, id16)
}