node.js – 如何访问OpenShift通配符SSL证书和私钥

You can always take advantage of our *.rhcloud.com wildcard certificate in order 
to securely connect to any application via it's original,OpenShift-provided 
hostname URl.

但是,Node的httpS服务器需要证书和私钥的文件路径才能使用httpS：

var privateKey  = fs.readFileSync('sslcert/server.key','utf8');
var certificate = fs.readFileSync('sslcert/server.crt','utf8');
var credentials = {key: privateKey,cert: certificatE};
var express = require('express');
var app = express();
var httpsServer = https.createServer(credentials,app);
httpsServer.listen(443);

OpenShift环境变量(https://www.openshift.com/developers/openshift-environment-variables)似乎都与SSL证书无关,除了上述链接之外,文档没有提及它,因为在实际使用它时没有提供任何技术信息.

如何访问OpenShift Node.js gear / cartridge上的privateKey和证书文件？