Add PHP Extension for GmSSL

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

php/ext/openssl/tests/bug73833.phpt

@@ -0,0 +1,31 @@
+--TEST--
+Bug #73833: null character not allowed in openssl_pkey_get_private
+--SKIPIF--
+<?php
+if (!extension_loaded("openssl")) die("skip openssl not loaded");
+?>
+--FILE--
+<?php
+$passwords = ["abc\x00defghijkl", "abcdefghikjl"];
+$conf = ['config' => __DIR__ . DIRECTORY_SEPARATOR . 'openssl.cnf'];
+
+foreach($passwords as $password) {
+	$key = openssl_pkey_new($conf);
+
+	if (openssl_pkey_export($key, $privatePEM, $password, $conf) === false) {
+		echo "Failed to encrypt.\n";
+	} else {
+		echo "Encrypted!\n";
+	}
+	if (openssl_pkey_get_private($privatePEM, $password) === false) {
+		echo "Failed to decrypt.\n";
+	} else {
+		echo "Decrypted!\n";
+	}
+}
+?>
+--EXPECT--
+Encrypted!
+Decrypted!
+Encrypted!
+Decrypted!