Book Image

Defending APIs

By : Colin Domoney
Book Image

Defending APIs

By: Colin Domoney

Overview of this book

Along with the exponential growth of API adoption comes a rise in security concerns about their implementation and inherent vulnerabilities. For those seeking comprehensive insights into building, deploying, and managing APIs as the first line of cyber defense, this book offers invaluable guidance. Written by a seasoned DevSecOps expert, Defending APIs addresses the imperative task of API security with innovative approaches and techniques designed to combat API-specific safety challenges. The initial chapters are dedicated to API building blocks, hacking APIs by exploiting vulnerabilities, and case studies of recent breaches, while the subsequent sections of the book focus on building the skills necessary for securing APIs in real-world scenarios. Guided by clear step-by-step instructions, you’ll explore offensive techniques for testing vulnerabilities, attacking, and exploiting APIs. Transitioning to defensive techniques, the book equips you with effective methods to guard against common attacks. There are plenty of case studies peppered throughout the book to help you apply the techniques you’re learning in practice, complemented by in-depth insights and a wealth of best practices for building better APIs from the ground up. By the end of this book, you’ll have the expertise to develop secure APIs and test them against various cyber threats targeting APIs.
Table of Contents (19 chapters)
1
Part 1: Foundations of API Security
6
Part 2: Attacking APIs
10
Part 3: Defending APIs

Mastering the tools of the trade

APIs are, by their nature, not exposed directly to the end user; rather, they are consumed via a mobile or web application, or perhaps via another API. To attack an API, we need to use a client and/or an interception tool, as discussed in the Interacting with APIs section.

The choice of tools is largely a personal one and my advice to you would be to choose one client (a command-line interface (CLI) such as curl or a GUI such as Postman) and one interception tool (such as Burp Suite) and become familiar with their usage across several scenarios.

CLI clients (HTTPie/cURL)

The simplest API client is a CLI client designed to be run interactively at a command prompt or terminal. They are particularly useful when testing connectivity to APIs or doing simple, quick debugging at the command line.

Most Unix-based OSs will come with either cURL (https://curl.se/) or wget (https://www.gnu.org/software/wget/) pre-installed or readily available from...