Have cURL extension look for certificates in directory set by "openssl.capath"

Description

I'm on Windows using openssl.cafile and a cacert.pem from curl.se . I also got a local CA certificate that I use. So far I've been just editing any new cacert.pem file to add my certificate. Been working great, but wanted to test if cURL would use openssl.capath to look for it. However, it was just ignoring even with the correct filname (<certificate hash>.0), not even making any access to the directory I set. Only using CURLOPT_CAPATH in the PHP script made it look for the certificate.

Checked out branch "PHP-8.1.22" and looked into ext/curl/interface.c and did the following:

@@ -1817,6 +1817,7 @@ static void create_certinfo(struct curl_certinfo *ci, zval *listcode)
 static void _php_curl_set_default_options(php_curl *ch)
 {
 	char *cainfo;
+	char *capath;
 
 	curl_easy_setopt(ch->cp, CURLOPT_NOPROGRESS,        1);
 	curl_easy_setopt(ch->cp, CURLOPT_VERBOSE,           0);
@@ -1840,6 +1841,11 @@ static void _php_curl_set_default_options(php_curl *ch)
 	if (cainfo && cainfo[0] != '\0') {
 		curl_easy_setopt(ch->cp, CURLOPT_CAINFO, cainfo);
 	}
+	
+	capath = INI_STR("openssl.capath");
+	if (capath && capath[0] != '\0') {
+		curl_easy_setopt(ch->cp, CURLOPT_CAPATH, capath);
+	}
 
 #ifdef ZTS
 	curl_easy_setopt(ch->cp, CURLOPT_NOSIGNAL, 1);

Compiled and tested to be working.

Could also consider adding curl.capath as a setting.

从 ext/curl/interface.c 中的 _php_curl_set_default_options 开始，将现有的 openssl.cafile 处理与针对 openssl.capath 的拟议更改进行比较。在 Windows 上使用配置目录中带有哈希的证书构建并测试 cURL 扩展；完成标准是 cURL 使用 openssl.capath，而无需在 PHP 脚本中要求 CURLOPT_CAPATH。