HTTPS/Client-authenticated

HTTPS/Client-authenticated
You are encouraged to solve this task according to the task description, using any language you may know.

Demonstrate how to connect to a web server over HTTPS where that server requires that the client present a certificate to prove who (s)he is. Unlike with the HTTPS request with authentication task, it is not acceptable to perform the authentication by a username/password or a set cookie.

This task is in general useful for use with webservice clients as it offers a high level of assurance that the client is an acceptable counterparty for the server. For example, Amazon Web Services uses this style of authentication.

C#

Works with: C sharp version 3.0

<lang csharp> using System; using System.Net;

class Program {

   class MyWebClient : WebClient
   {
       protected override WebRequest GetWebRequest(Uri address)
       {
           HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(address);
           request.ClientCertificates.Add(new X509Certificate());
           return request;
       }
   }
   static void Main(string[] args)
   {
       var client = new MyWebClient();

       var data = client.DownloadString("https://example.com");

       Console.WriteLine(data);
   }

} </lang>

Go

<lang Go>package main

import ( "crypto/tls" "io/ioutil" "log" "net/http" )

func main() {

// load key pair cert, err := tls.LoadX509KeyPair( "./client.local.tld/client.local.tld.crt", "./client.local.tld/client.local.tld.key", )

if err != nil { log.Fatal("Error while loading x509 key pair", err) }

// Create TLS Config in order to had client certificate tlsConfig := &tls.Config{Certificates: []tls.Certificate{cert}}

tlsConfig.BuildNameToCertificate() transport := &http.Transport{TLSClientConfig: tlsConfig}

// create http client with our custom transport with TLS config client := &http.Client{Transport: transport}

res, err := client.Get("https://www.example.com/") if err != nil { log.Fatal(err) } contents, err := ioutil.ReadAll(res.Body) log.Print(string(contents))

} </lang>

Julia

<lang julia>using HTTP, MbedTLS

conf = MbedTLS.SSLConfig(true, log_secrets="/utl/secret_key_log.log") resp = HTTP.get("https://httpbin.org/ip", sslconfig=conf)

println(resp)

</lang>

Output:

HTTP.Messages.Response:
"""
HTTP/1.1 200 OK
Connection: keep-alive
Server: gunicorn/19.9.0
Date: Wed, 28 Nov 2018 08:42:25 GMT
Content-Type: application/json
Content-Length: 30
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
Via: 1.1 vegur
{

 "origin": "104.28.10.103"

}
"""

Kotlin

<lang scala>// version 1.2.0

import java.security.KeyStore import javax.net.ssl.KeyManagerFactory import javax.net.ssl.SSLContext import javax.net.ssl.HttpsURLConnection import java.net.URL import java.io.FileInputStream import java.io.InputStreamReader import java.io.BufferedReader

fun getSSLContext(p12Path: String, password: String): SSLContext {

   val ks = KeyStore.getInstance("pkcs12")
   val fis = FileInputStream(p12Path)
   val pwd = password.toCharArray()
   ks.load(fis, pwd)
   val kmf = KeyManagerFactory.getInstance("PKIX")
   kmf.init(ks, pwd)
   val sc = SSLContext.getInstance("TLS")
   sc.init(kmf.keyManagers, null, null)
   return sc

}

fun main(args: Array<String>) {

   // The .p12 file contains the client certificate and private key
   val sc = getSSLContext("whatever.p12", "password")
   val url = URL("https://somehost.com")
   val con = url.openConnection() as HttpsURLConnection
   con.sslSocketFactory = sc.socketFactory
   val isr = InputStreamReader(con.inputStream)
   val br = BufferedReader(isr)
   while (true) {
       val line = br.readLine()
       if (line == null) break
       println(line)
   }

}</lang>

Lasso

<lang Lasso>local(sslcert = file('myCert.pem')) local(x = curl('https://sourceforge.net'))

1. x->set(CURLOPT_SSLCERT, #sslcert->readstring)
2. sslcert->close
3. x->result->asString</lang>

Mathematica / Wolfram Language

<lang Mathematica>a = RunThrough["curl -E myCert.pem https://www.example.com", 1] For[ i=0, i < Length[a] , i++, SomeFunction[a]]</lang>

Perl

<lang python>#!/usr/bin/env perl -T use 5.018_002; use warnings; use LWP;

our $VERSION = 1.000_000;

my $ua = LWP::UserAgent->new(

   ssl_opts => {
       SSL_cert_file   => 'certificate.pem',
       SSL_key_file    => 'key.pem',
       verify_hostname => 1,
   }

); my $req = HTTP::Request->new( GET => 'https://www.example.com' ); my $res = $ua->request($req); if ( $res->is_success ) {

   say $res->content;

} else {

   say $res->status_line;

}</lang>

Phix

Library: Phix/libcurl

Exactly the same as the HTTP#Phix task, except for the CURLOPT_SSLCERT part. <lang Phix>include builtins\libcurl.e curl_global_init() atom curl = curl_easy_init() curl_easy_setopt(curl, CURLOPT_URL, "https://sourceforge.net") integer fn = open("myCert.pem","r") curl_easy_setopt(curl, CURLOPT_SSLCERT, get_text(fn)) close(fn) object res = curl_easy_perform_ex(curl) curl_easy_cleanup(curl) curl_global_cleanup()

puts(1,res)</lang>

PicoLisp

<lang PicoLisp>(in '(curl "-E" "myCert.pem" "https://www.example.com")

  (while (line)
     (doSomeProcessingWithLine @) ) )</lang>

Python

<lang python>import httplib

connection = httplib.HTTPSConnection('www.example.com',cert_file='myCert.PEM') connection.request('GET','/index.html') response = connection.getresponse() data = response.read() </lang>

Racket

Skeleton code to connect to a server: <lang racket>

1. lang racket

(require openssl/mzssl) (define ctx (ssl-make-client-context)) (ssl-set-verify! ctx #t) ; verify the connection (ssl-load-verify-root-certificates! ctx "my-cert.pem") (define-values [I O] (ssl-connect "www.example.com" 443 ctx)) </lang>

Raku

(formerly Perl 6) <lang perl6>

1. cert creation commands

1. openssl req -newkey rsa:4096 -keyout my_key.pem -out my_csr.pem -nodes -subj "/CN=ME"

1. openssl x509 -req -in my_csr.pem -signkey my_key.pem -out my_cert.pem

use v6; use OpenSSL;

my $host = "github.com";

my $ssl = OpenSSL.new(:client);

$ssl.use-certificate-file("./my_cert.pem"); $ssl.use-privatekey-file("./my_key.pem"); $ssl.check-private-key;

my $s = IO::Socket::INET.new(:$host, :port(443));

$ssl.set-socket($s); $ssl.set-connect-state; $ssl.connect; $ssl.write("GET / HTTP/1.1\r\n\r\n"); say $ssl.read(1024); $ssl.close; $s.close;

</lang>

Ruby

<lang Ruby>require 'uri' require 'net/http'

uri = URI.parse('https://www.example.com') pem = File.read("/path/to/my.pem") cert = OpenSSL::X509::Certificate.new(pem) key = OpenSSL::PKey::RSA.new(pem) response = Net::HTTP.start(uri.host, uri.port, use_ssl: true,

                          cert: cert, key: key) do |http|
 request = Net::HTTP::Get.new uri
 http.request request

end</lang>

Scala

<lang Scala>import java.io.FileInputStream import java.net.URL import java.security.KeyStore

import javax.net.ssl.{HttpsURLConnection, KeyManagerFactory, SSLContext}

import scala.io.BufferedSource

object ClientAuthenticated extends App {

 val con: HttpsURLConnection =
   new URL("https://somehost.com").openConnection().asInstanceOf[HttpsURLConnection]

 def getSSLContext(p12Path: String, password: String): SSLContext = {
   val ks = KeyStore.getInstance("pkcs12")
   val pwd = password.toCharArray
   ks.load(new FileInputStream(p12Path), pwd)
   val kmf = KeyManagerFactory.getInstance("PKIX")
   kmf.init(ks, pwd)
   val sc = SSLContext.getInstance("TLS")
   sc.init(kmf.getKeyManagers, null, null)
   sc
 }

 // The .p12 file contains the client certificate and private key
 HttpsURLConnection.setDefaultSSLSocketFactory(getSSLContext("whatever.p12", "password").getSocketFactory)
 new BufferedSource(con.getInputStream).getLines.foreach(println(_))

}</lang>

Tcl

Uses the Tls package. <lang tcl>package require http package require tls

set cert myCert.p12 http::register https 443 [list \

   ::tls::socket -certfile $cert -password getPass]

proc getPass {} {

   return "myPassword";  # Just a noddy example...

}

1. Make a secure authenticated connection

set token [http::geturl https://verysecure.example.com/]

1. Now as for conventional use of the “http” package

set data [http::data $token] http::cleanup $token</lang>

zkl

Uses libCurl. <lang zkl>var CURL=Import("zklCurl"), c=CURL(); c.setOpt("SSLCERT","certFile.pem"); c.setOpt("SSLCERTTYPE","pem"); c.get("http://zenkinetic.com"); // lame example to show how to read</lang>