func main() {
key, err := totp.Generate(totp.GenerateOpts{
Issuer: "Example.com",
AccountName: "*****@*****.**",
})
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)
}
}
func (o *OTP) Validate(password string) error {
key, err := otp.NewKeyFromURL(o.URI)
if err != nil {
return err
}
if !totp.Validate(password, key.Secret()) {
return ErrAccessDenied
}
return nil
}