HTTP-代理-中间件+express+Node.js-在启用客户端证书身份验证的情况下无法重定向到endpoint

Question

我正在使用http-proxy-middleware（https://www.npmjs.com/package/http-proxy-middleware）实现另一个REST API的代理，该API启用了基于客户端证书的身份验证（RequestCert：true,RejectunAuthorized：true）。

客户端调用代理API（https：//localhost:3000/auth）,其中配置了http-proxy-middleware,并将其代理到另一个REST API（https：//localhost:3002/auth）,该API启用了基于客户端证书的身份验证（requestcert：true,rejectunauthorized：true）。

我不希望在代理服务器上发生任何特定的身份验证。当我使用一条路径调用代理时,该路径将通过基于客户端证书的身份验证路由到此目标endpoint,它将失败,并显示错误消息：

代理服务器中收到错误：

[HPM] Rewriting path from "/auth" to ""
[HPM] GET /auth ~> https://localhost:3002/auth

RAW REQUEST from the target {
  "host": "localhost:3000",
  "connection": "close"
}
redirecting to auth
[HPM] Error occurred while trying to proxy request  from localhost:3000 to https://localhost:3002/auth (EPROTO) (https://nodejs.org/api/errors.html#errors_common_system_errors)

客户端收到错误：

Proxy error: Error: write EPROTO 28628:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:c:\ws\deps\openssl\openssl\ssl\record\rec_layer_s3.c:1536:SSL alert number 40

我不需要代理以任何方式验证/处理随传入请求而来的客户端证书（我为此设置了secure：false)，而只需要将其转发到目标endpoint。我们看到从客户端接收到的证书没有被传递/代理/转发到目标endpoint，因此基于证书的身份验证在目标endpoint上失败。

直接发送到目标endpoint的客户端请求是有效的，而通过HTTP代理中间件代理发送的客户端请求是无效的。

下面给出了我的测试服务器，客户端代码供参考。

是否有某种方法来配置HTTP代理中间件，以便它将从客户端接收到的客户端证书转发/代理到目标endpoint，从而使客户端发送的客户端证书可用于目标RESTendpoint上基于证书的验证？

能否请您指导我如何使用http-proxy-middleware包或任何其他合适的方式来做到这一点？提前道谢。

服务器代码

// Certificate based HTTPS Server

var authOptions = {
    key: fs.readFileSync('./certs/server-key.pem'),
    cert: fs.readFileSync('./certs/server-crt.pem'),
    ca: fs.readFileSync('./certs/ca-crt.pem'),
    requestCert: true,
    rejectUnauthorized: true
};  

var authApp = express();
authApp.get('/auth', function (req, res) {
    res.send("data from auth");
});

var authServer = https.createServer(authOptions, authApp);
authServer.listen(3002);


// HTTP Proxy Middleware

var authProxyConfig = proxy({
    target: 'https://localhost:3002/auth',
    pathRewrite: {
        '^/auth': '' // rewrite path
    },
    changeOrigin: true,
    logLevel: 'debug',
    secure: false,
    onProxyReq: (proxyReq, req, res) => {
        // Incoming request ( req ) : Not able to see the certificate that was passed by client.
        // Refer the following client code for the same
    },
    onError: (err, req, res) => {
         res.end(`Proxy error: ${err}.`);
    }
});

proxyApp.use('/auth', authProxyConfig);

var unAuthOptions = {
    key: fs.readFileSync('./certs/server-key.pem'),
    cert: fs.readFileSync('./certs/server-crt.pem'),
    ca: fs.readFileSync('./certs/ca-crt.pem'),
    requestCert: false,
    rejectUnauthorized: false
};

var proxyServer = https.createServer(unAuthOptions, proxyApp);
proxyServer.listen(3000);

var fs = require('fs');
var https = require('https');

process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
var options = {
    hostname: 'localhost',
    port: 3000,
    path: '/auth',
    method: 'GET',
    key: fs.readFileSync('./certs/client1-key.pem'),
    cert: fs.readFileSync('./certs/client1-crt.pem'),
    ca: fs.readFileSync('./certs/ca-crt.pem')
};

var req = https.request(options, function (res) {
    res.on('data', function (data) {
        process.stdout.write(data);
    });
});
req.end();

Answer 1

您具体地说//Incoming request(req):Not able to see the certificate thas was by client.，所以您可能已经查看了GetPeerCertifice并发现连接已关闭。

也就是说，在OnProxyReq处理程序中，您可以尝试使用GetPeerCertifice方法（docs）将证书从Req添加到ProxyReq中。

这个SO answer+comment显示了如何获取并转换为有效的证书。

const parseReqCert = (req) => {
   const { socket } = req; 
   const prefix = '-----BEGIN CERTIFICATE-----'; 
   const postfix = '-----END CERTIFICATE-----'; 
   const pemText = socket.getPeerCertificate(true).raw.toString('base64').match(/.{0,64}/g);

   return [prefix, pemText, postfix].join("\n");
}

const addClientCert = (proxyReq, req) => {
   proxyReq.cert = parseReqCert(req);
   return proxyReq;
}

const authProxyConfig = proxy({
    ...
    onProxyReq: (proxyReq, req, res) => {
       addClientCert(proxyReq, req);
    },
    ...
})