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.

ext/curl/interface.c の _php_curl_set_default_options から始め、既存の openssl.cafile の処理と、提案されている openssl.capath への変更を比較します。設定されたディレクトリにハッシュ化された証明書を置いて Windows 上で cURL 拡張機能をビルドおよびテストします。cURL が PHP スクリプトで CURLOPT_CAPATH を指定しなくても openssl.capath を使用すれば完了です。