alipay error

mobile/api/payment/alipay/lib/alipay_rsa.function.php

@@ -44,7 +44,8 @@ function rsaVerify($data, $ali_public_key_path, $sign)  {
     $sign = base64_decode($sign);
     $result = (bool)openssl_verify($data, $sign, $res);
     $err = openssl_error_string();
-    openssl_free_key($res);    
+    Log::record("openssl last error={$err}",Log::DEBUG);
+    openssl_free_key($res);
     return $result;
 }