Macos Daemonology: Communicate with Daemons, Agents, and Helpers Through Xpc

ISBN-13: 9781484272763 / Angielski / Miękka / 2021 / 235 str.

Volodymyr Vashurkin

Spis treści

Part 1. Daemons: Overview & Management

Chapter 1. Daemons at a Glance

The operating system background world

Different types of daemons 

 

Chapter 2. launchd and launchd Jobs

launchd functional related to daemons

Daemons' configuration (.plist files).

 

Chapter 3. launchctl

Setup and manage daemons

launchctl tool in detail

Swift API for daemons management

 

Part 2. Daemons in Detail

Chapter 4. Choose the right daemon for you

Comparing daemon types

Picking a daemon type based on needs 

 

Chapter 5. Classic Daemons

What is a classic daemon?

Root background processes

 

Chapter 6. User Agents

Specifics of user agents

User background processes

 

Chapter 7. XPC Services

The Simplest daemon

Working with XPC services

 

Chapter 8. Privileged Helpers

Special daemons 

The official and modern way of privilege escalation in macOS

 

Chapter 9. Login Items

User Agent LoginItem 

APIs related to LoginItem

 

Chapter 10. System Extensions (since macOS 10.15)

Brand new daemon types

System Extension

EndpointSecurity.framework

Required entitlements

Specific installation

Management

 

Part 3. Talking to Daemons

Chapter 11. XPC Communication

Examples of XPC communication between processes

Corner cases

Passing objects by-proxy

Using NSProgress within XPC

Other details

 

Chapter 12. XPC Security

Notes and recommendations 

Securing XPC communication between processes

Code signing

 

Chapter 13. XPC and Swift

Adopting XPC communication to Swift

Passing structures over XPC

Working with callbacks instead of delegates

 

Part 4. Specifics and Nuances

Chapter 14. UserAgents and Sandboxs (AppStore compatible)

Use UserAgents as part of sandboxed applications

AppStore compatibility

O autorze

Volodymyr Vashurkin (@alkenso) is an experienced macOS system and security developer and engineer. His first steps in daemonology were made while researching FileVault full disk encryption on macOS, and its interaction with iCloud services. iCloud on macOS uses plenty of system daemons and user agents, and investigating macOS’s infrastructure led to a solid understanding of how the background world of macOS works. This led him deeply into the development of security solutions for macOS. Working in the security area, Volodymyr gained practical skills for creating GUI-based applications with fewer user agents (user background processes) and root daemons (root'ed background processes). In developing his knowledge and skills, Volodymyr faced numerous tricky cases, lack of documentation, and minor and major documentation gaffes. He would like to help his readers avoid the same pitfalls.

Blurb

Take advantage of the full power of Swift through XPC. Development for macOS differs from iOS and web-based development because of multicomponent applications. Besides the usual GUI-based applications and app extensions, there are a wide range of daemons—processes that run in the background—to worry about. These include system monitoring, event listening, notification agents, and many-many more.

First, you'll take a tour around different types of daemons: user agents, privileged helpers, login items, XPC services, and System Extensions. Knowing key specifics of the daemons will open a wide range of possibilities from non-trivial application development to system development. You'll find lots of examples, working code samples, and even ready-to-use utilities. The book will guide you step-by-step through preparation, registration, and management of all kinds of daemons.

System Extensions are brand new for macOS and open additional powerful features for developers. You'll explore installation, user flow, and communication with System Extensions, too, with examples, of course. XPC provides an object-oriented way of communication. There’s no need for custom byte/text-based protocols. A good macOS developer has to know not only programming interfaces, but also design patterns related to technology. XPC communication has a few patterns of its own, and we'll go through them all, including uni- and bi-directional communication, passing objects by-value and by-proxy, handling connection invalidation, named and anonymous connections, and many more.

You will:

• Use multiples types of daemons in your applications 
  
• Deal with System Extensions – the new type of system daemons 
  
• Get acquainted with Swift bridging patterns for XPC communication