From ee2b1fc48aa27c8038fe159dcdb2e7d9bed30e24 Mon Sep 17 00:00:00 2001
From: yansongda <me@yansongda.cn>
Date: Mon, 12 Aug 2019 23:16:53 +0800
Subject: [PATCH] fix #264

---
 src/Gateways/Alipay/Support.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Gateways/Alipay/Support.php b/src/Gateways/Alipay/Support.php
index 1a3f46a96..b0895fb4c 100644
--- a/src/Gateways/Alipay/Support.php
+++ b/src/Gateways/Alipay/Support.php
@@ -156,7 +156,9 @@ public static function generateSign(array $params): string
         }
 
         if (Str::endsWith($privateKey, '.pem')) {
-            $privateKey = openssl_pkey_get_private($privateKey);
+            $privateKey = openssl_pkey_get_private(
+                Str::startsWith($privateKey, 'file://') ? $privateKey : 'file://'.$privateKey
+            );
         } else {
             $privateKey = "-----BEGIN RSA PRIVATE KEY-----\n".
                 wordwrap($privateKey, 64, "\n", true).