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<?php |
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namespace ElliotSawyer\TOTPAuthenticator; |
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use Endroid\QrCode\Exception\InvalidWriterException; |
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use Endroid\QrCode\QrCode; |
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use lfkeitel\phptotp\Base32; |
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use lfkeitel\phptotp\Totp; |
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use SilverStripe\Forms\FieldList; |
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use SilverStripe\Forms\LiteralField; |
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use SilverStripe\Forms\ToggleCompositeField; |
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use SilverStripe\ORM\DataExtension; |
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use SilverStripe\SiteConfig\SiteConfig; |
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/** |
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* Class MemberExtension |
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* |
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* @package ElliotSawyer\TOTPAuthenticator |
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* @property MemberExtension $owner |
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* @property string $TOTPSecret |
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*/ |
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class MemberExtension extends DataExtension |
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{ |
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/** |
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* @var array |
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*/ |
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private static $db = [ |
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'TOTPSecret' => 'Varchar(1024)', |
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]; |
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/** |
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* @throws \Exception |
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*/ |
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public function onBeforeWrite() |
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{ |
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// Only regenerate if there is no secret and MFA is not enabled yet |
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// Inherits MFAEnabled from Bootstrap object extension |
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if (!$this->owner->TOTPSecret || !$this->owner->MFAEnabled) { |
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$secret = Totp::GenerateSecret(16); |
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$secret = Base32::encode($secret); |
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$this->owner->TOTPSecret = $secret; |
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} |
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} |
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/** |
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* @param FieldList $fields |
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* @throws InvalidWriterException |
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*/ |
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public function updateCMSFields(FieldList $fields) |
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{ |
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if (!$this->owner->exists()) { |
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$fields->removeByName('TOTPSecret'); |
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} |
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if (strlen($this->owner->TOTPSecret)) { |
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$qrcodeURI = $this->GoogleAuthenticatorQRCode(); |
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$fields->addFieldToTab('Root.Main', ToggleCompositeField::create( |
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null, |
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_t(self::class . '.CMSTOGGLEQRCODELABEL', 'Second Factor Token Secret'), |
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LiteralField::create(null, sprintf("<img src=\"%s\" />", $qrcodeURI)) |
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)); |
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$fields->removeByName('TOTPSecret'); |
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} |
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} |
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/** |
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* @return string |
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* @throws InvalidWriterException |
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*/ |
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public function GoogleAuthenticatorQRCode() |
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{ |
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$qrCode = new QrCode($this->generateOTPAuthString()); |
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$qrCode->setSize(300); |
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$qrCode->setWriterByName('png'); |
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$qrcodeURI = $qrCode->writeDataUri(); |
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return $qrcodeURI; |
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} |
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/** |
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* @return string |
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*/ |
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public function generateOTPAuthString() |
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{ |
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$label = urlencode(SiteConfig::current_site_config()->Title); |
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$secret = $this->owner->TOTPSecret; |
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$email = $this->owner->Email; |
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return sprintf( |
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'otpauth://totp/%s:%s?secret=%s&issuer=%s', |
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$label, |
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$email, |
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$secret, |
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$label |
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); |
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} |
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} |
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