Add PHP Extension for GmSSL

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

php/ext/openssl/tests/cve-2013-6420.phpt

@@ -0,0 +1,18 @@
+--TEST--
+CVE-2013-6420
+--SKIPIF--
+<?php 
+if (!extension_loaded("openssl")) die("skip"); 
+?>
+--FILE--
+<?php
+$crt = substr(__FILE__, 0, -4).'.crt';
+$info = openssl_x509_parse("file://$crt");
+var_dump($info['issuer']['emailAddress'], $info["validFrom_time_t"]);
+?>
+Done
+--EXPECTF--
+%s openssl_x509_parse(): illegal length in timestamp in %s%ecve-2013-6420.php on line 3
+string(27) "stefan.esser@sektioneins.de"
+int(-1)
+Done