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WebRTC Cookbook
WebRTC Cookbook

WebRTC Cookbook: Get to grips with advanced real-time communication applications and services on WebRTC with practical, hands-on recipes

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WebRTC Cookbook

Chapter 2. Supporting Security

In this chapter, we will cover the following topics:

  • Generating a self-signed certificate
  • Configuring a TURN server with authentication
  • Configuring a web server to work over HTTPS
  • Configuring a WebSockets proxy on the web server
  • Configuring a firewall

Introduction

At the time of writing this book, the WebRTC standard was not complete and the technology and its standard were both under active development. Nevertheless, security and safety are very important and mandatory functional requirements that lie at the basis of the WebRTC standard. Basically, your WebRTC application should use only encrypted channels.

In this chapter, we will cover security-related questions. We will talk about security, third-party components, and software you will probably use when developing your WebRTC service. We will talk about configuring secured channels (HTTPS) on web browsers. We will cover the process of creating secure certificates and using them in web servers as well as the TURN service. We will also learn how to implement authentication on a TURN server using the TURN REST API.

We will talk about how WebRTC can work through firewalls and NAT, and learn how to configure a firewall on our server that is serving auxiliary services such as TURN or STUN...

Generating a self-signed certificate

Using encryption is highly recommended (I'd say even mandatory) for WebRTC applications. The technology has good support for security and encryption, so there is no reason to ignore them. In this recipe, we will cover the process of creating self-signed certificates. Such a certificate can be used with a TURN server or with a web server when operating with HTTPS channels.

Typically, a public key infrastructure (PKI) is a digital signature from a certificate authority (CA), which attests that a particular PKI is valid and contains correct information. Users or their software then check that the private key used to sign a certificate matches the public key in the CA's certificate. Since CA certificates are often signed by other, high-ranking CAs, there must necessarily be a highest-ranking CA, which provides the ultimate attestation authority in that particular PKI scheme.

The highest-ranking CA's certificates are termed as root certificates...

Configuring a TURN server with authentication

STUN servers don't support authentication, but on the other hand, TURN servers do. Moreover, if you maintain a TURN server, it has to support authentication and prohibit anonymous access. When using a TURN service, all the traffic from one peer to another goes through the TURN server. If anyone had anonymous access to such a server, they could very quickly utilize the server's resources and traffic limits.

In this recipe, we are going to go through a TURN authentication task.

Getting ready

First of all, we need to download and install a TURN server. There are several implementations, and in this recipe, we will consider using rfc5766-turn-server.

This software is multiplatform and can be used on Unix-like systems and on Windows systems as well. Nevertheless, to keep it simple, in this recipe, we will cover a Linux-based case only.

Download the source code from the TURN server home page at https://code.google.com/p/rfc5766-turn-server/...

Configuring a web server to work over HTTPS

In this recipe, we will cover how to configure a secured layer (HTTPS) on a web server. As far as encryption and security are mandatory for WebRTC, HTTPS is an important part of the whole application's security and safety.

Getting ready

We will cover the three most popular web servers: Nginx, Apache HTTP Server, and IIS from Microsoft. We will not cover the installation procedure, so you should have the web server you wish to use installed and properly configured.

How to do it…

What we need to do is to edit the web server's configuration to switch on using HTTPS. Before we make the configuration changes, you need to have the generated security certificate. Usually, it is two files: a certificate and certificate key. But it is possible to join these two files into just one. In this recipe, we will consider the first option, with two files.

These certificate files (server.crt and server.key) can be trusted SSL certificates or they can...

Configuring a WebSockets proxy on the web server

WebSockets is a new protocol that enables active messaging from server to client. It is supported by all modern web browsers. This protocol is implemented on top of HTTP and can be easily served by most popular web servers. It can also be served over secured channels, such as HTTPS. Because of WebSockets' advantages, people often choose this protocol for their client-server projects. In WebRTC-based applications, WebSockets usually serves as a transport protocol for signaling server implementation.

Configuring a WebSockets proxy on a web server can be very useful if you have used WebSockets as a transport layer for communicating with the signaling server. For some cases, it might even be mandatory.

Getting ready

Configuring this feature requires making changes in the configuration files of the web server. We will not cover the entire web server's installation and configuration process, so you need to have the web server up and running...

Introduction


At the time of writing this book, the WebRTC standard was not complete and the technology and its standard were both under active development. Nevertheless, security and safety are very important and mandatory functional requirements that lie at the basis of the WebRTC standard. Basically, your WebRTC application should use only encrypted channels.

In this chapter, we will cover security-related questions. We will talk about security, third-party components, and software you will probably use when developing your WebRTC service. We will talk about configuring secured channels (HTTPS) on web browsers. We will cover the process of creating secure certificates and using them in web servers as well as the TURN service. We will also learn how to implement authentication on a TURN server using the TURN REST API.

We will talk about how WebRTC can work through firewalls and NAT, and learn how to configure a firewall on our server that is serving auxiliary services such as TURN or STUN...

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Description

If you are a JavaScript developer with a basic knowledge of WebRTC and software development, but want to explore how to use it in more depth, this book is for you.

Who is this book for?

If you are a JavaScript developer with a basic knowledge of WebRTC and software development, but want to explore how to use it in more depth, this book is for you.

What you will learn

  • Understand the concepts of WebRTC while setting up rich web applications
  • Create a signaling server using Java or Erlang
  • Secure your WebRTC application by configuring your own STUN/TURN server
  • Integrate with VoIP platforms such as Asterisk and FreeSWITCH and abstract the complexities of communications protocols
  • Get acquainted with advanced debugging and troubleshooting techniques
  • Process videos using HTML5 filters
  • Develop native mobile applications using WebRTC and integrate them with web services
  • Discover advanced WebRTC techniques and solutions
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Publication date : Feb 25, 2015
Length: 230 pages
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Language : English
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Table of Contents

9 Chapters
1. Peer Connections Chevron down icon Chevron up icon
2. Supporting Security Chevron down icon Chevron up icon
3. Integrating WebRTC Chevron down icon Chevron up icon
4. Debugging a WebRTC Application Chevron down icon Chevron up icon
5. Working with Filters Chevron down icon Chevron up icon
6. Native Applications Chevron down icon Chevron up icon
7. Third-party Libraries Chevron down icon Chevron up icon
8. Advanced Functions Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

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Tsahi Levent-Levi Jun 11, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This is a very good reference for a lot of tasks a developer would find himself doing when using WebRTC.It addresses many areas where other books don't handle, such as video filters, integration with popular frameworks, UX polish, etc.Highly recommended for people who are dealing with real time communications.For a longform review, check here: https://bloggeek.me/book-review-webrtc-cookbook/
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