/**
* Validate the request's checksum
* @throws Syspay_Merchant_RedirectException If the checksum didn't validate
*/
private function checkChecksum($result, $merchant, $checksum)
{
if (empty($merchant) || empty($checksum) || empty($result)) {
throw new Syspay_Merchant_RedirectException('Missing parameter', Syspay_Merchant_RedirectException::CODE_MISSING_PARAM);
}
if (empty($this->secrets[$merchant])) {
throw new Syspay_Merchant_RedirectException('Unknown merchant: ' . $merchant, Syspay_Merchant_RedirectException::CODE_UNKNOWN_MERCHANT);
}
if (!Syspay_Merchant_Utils::checkChecksum($result, $this->secrets[$merchant], $checksum)) {
throw new Syspay_Merchant_RedirectException('Invalid checksum', Syspay_Merchant_RedirectException::CODE_INVALID_CHECKSUM);
}
}
/**
* Validate the header's checksum
* @throws Syspay_Merchant_EMSException If the checksum didn't validate
*/
private function checkChecksum()
{
if (empty($this->headers['x-merchant'])) {
throw new Syspay_Merchant_EMSException('Missing x-merchant header', Syspay_Merchant_EMSException::CODE_MISSING_HEADER);
}
if (empty($this->headers['x-checksum'])) {
throw new Syspay_Merchant_EMSException('Missing x-checksum header', Syspay_Merchant_EMSException::CODE_MISSING_HEADER);
}
if (!isset($this->secrets[$this->headers['x-merchant']])) {
throw new Syspay_Merchant_EMSException('Unknown merchant: ' . $this->headers['x-merchant'], Syspay_Merchant_EMSException::CODE_UNKNOWN_MERCHANT);
}
if (!Syspay_Merchant_Utils::checkChecksum($this->content, $this->secrets[$this->headers['x-merchant']], $this->headers['x-checksum'])) {
throw new Syspay_Merchant_EMSException('Invalid checksum', Syspay_Merchant_EMSException::CODE_INVALID_CHECKSUM);
}
}
