/**
* Generate provision URI according to KeyUriFormat
*
* @link https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
* @param string $label User label.
* @param array $opts Additional URI parameters, e.g. ['image' => 'http://example.com/my_logo.png'] .
* @throws \Bitrix\Main\ArgumentTypeException
* @return string
*/
public function generateUri($label, array $opts = array())
{
$positionalOpts = array('secret' => Base32::encode($this->getSecret()));
$opts['algorithm'] = $this->getDigest();
// Digest must be in upper case for some OTP apps (e.g Google Authenticator for iOS)
$opts['algorithm'] = strtoupper($opts['algorithm']);
$opts['digits'] = $this->getDigits();
ksort($opts);
// Some devices require a specific order for some parameters (e.g. Microsoft Authenticator require "secret" at first place %) )
$opts = array_merge($positionalOpts, $opts);
$params = http_build_query($opts, '', '&');
// Ugly hack for old PHP versions. Use PHP_QUERY_RFC3986 when Bitrix reached PHP 5.4.0
$params = str_replace(array('+', '%7E'), array('%20', '~'), $params);
return sprintf('%s://%s/%s?%s', $this->getAppScheme(), $this->getType(), rawurlencode($label), $params);
}
/**
* Return mobile application secret, using for manual device initialization
*
* @return string
*/
public function getAppSecret()
{
$secret = $this->getSecret();
$secret = Base32::encode($secret);
return rtrim($secret, '=');
}