/**
* Creates signature method instance from its configuration.
* @param array $signatureMethodConfig signature method configuration.
* @return signature\BaseMethod signature method instance.
*/
protected function createSignatureMethod(array $signatureMethodConfig)
{
if (!array_key_exists('class', $signatureMethodConfig)) {
$signatureMethodConfig['class'] = signature\HmacSha1::className();
}
return Yii::createObject($signatureMethodConfig);
}
