replace zxq.co/ripple/hanayo

vendor/github.com/pquerna/otp/example/main.go

@@ -0,0 +1,63 @@
+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)
+	}
+}