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