72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
// Copyright (C) 2018 Marius Schellenberger
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package otp
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import (
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"bytes"
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"encoding/base64"
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"github.com/pquerna/otp"
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"github.com/pquerna/otp/totp"
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"html/template"
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"image/png"
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)
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const dataUrl = "data:image/png;base64,"
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func base64Image(key *otp.Key) (data template.URL, err error) {
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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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return
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}
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err = png.Encode(&buf, img)
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if err != nil {
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return
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}
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data = template.URL(dataUrl + base64.StdEncoding.EncodeToString(buf.Bytes()))
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return
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}
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type Request struct {
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Username string
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Image template.URL
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Secret string
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URL string
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}
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func New(username string) (req Request, err error) {
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key, err := totp.Generate(totp.GenerateOpts{
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Issuer: "gowiki",
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AccountName: username,
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})
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if err != nil {
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return
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}
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data, err := base64Image(key)
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if err != nil {
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return
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}
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return Request{
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Username: username,
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Image: data,
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Secret: key.Secret(),
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URL: key.URL(),
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}, nil
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}
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func Validate(pin, secret string) bool {
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if secret == "" {
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return true
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}
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return totp.Validate(pin, secret)
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}
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func ImageSecretFromURL(url string) (data template.URL, secret string, err error) {
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key, err := otp.NewKeyFromURL(url)
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if err != nil {
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return
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}
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secret = key.Secret()
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data, err = base64Image(key)
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return
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}
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