节点4和节点6与自定义证书

Question

我尝试连接到具有特定证书的https服务器。出于某种原因，它似乎在Node 6.0.0中成功，但在Node 4.4.7中失败。

码

var fs    = require('fs');

var host = process.argv[2];       // host of the site
var certFile = process.argv[3];   // certificate from server
var ca =  fs.readFileSync(certFile, 'ascii');

var https = require('https');
https.request({ host: host, ca: ca }, function (res) {
  if (res.client.authorized) {
    console.log("node test: OK")
  } else {
    throw new Error(res.client.authorizationError)
  }
}).end()

节点6.0.0输出

node test: OK

节点4.4.7输出

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: unable to verify the first certificate
    at Error (native)
    at TLSSocket.<anonymous> (_tls_wrap.js:1017:38)
    at emitNone (events.js:67:13)
    at TLSSocket.emit (events.js:166:7)
    at TLSSocket._init.ssl.onclienthello.ssl.oncertcb.TLSSocket._finishInit (_tls_wrap.js:582:8)
    at TLSWrap.ssl.onclienthello.ssl.oncertcb.ssl.onnewsession.ssl.onhandshakedone (_tls_wrap.js:424:38)

系统

$ lsb_release -d
Description:    Ubuntu 16.04 LTS