Add PHP Extension for GmSSL

View http://gmssl.org/docs/php-api.html for more info.

php/ext/openssl/tests/openssl_pkey_get_details_basic.phpt

@@ -0,0 +1,31 @@
+--TEST--
+openssl_pkey_get_details() with EC key
+--SKIPIF--
+<?php
+if (!extension_loaded("openssl")) die("skip");
+if (!defined("OPENSSL_KEYTYPE_EC")) die("skip no EC available");
+?>
+--FILE--
+<?php
+$key = openssl_pkey_get_private("file://" . dirname(__FILE__) . "/private_ec.key");
+
+print_r(openssl_pkey_get_details($key));
+?>
+--EXPECTF--
+Array
+(
+    [bits] => 256
+    [key] => -----BEGIN PUBLIC KEY-----%a
+-----END PUBLIC KEY-----
+
+    [ec] => Array
+        (
+            [curve_name] => prime256v1
+            [curve_oid] => 1.2.840.10045.3.1.7
+            [x] => %a
+            [y] => %a
+            [d] => %a
+        )
+
+    [type] => 3
+)