Book Image

Android Security Cookbook

Book Image

Android Security Cookbook

Overview of this book

Android Security Cookbook discusses many common vulnerabilities and security related shortcomings in Android applications and operating systems. The book breaks down and enumerates the processes used to exploit and remediate these vulnerabilities in the form of detailed recipes and walkthroughs. The book also teaches readers to use an Android Security Assessment Framework called Drozer and how to develop plugins to customize the framework. Other topics covered include how to reverse-engineer Android applications to find common vulnerabilities, and how to find common memory corruption vulnerabilities on ARM devices. In terms of application protection this book will show various hardening techniques to protect application components, the data stored, secure networking. In summary, Android Security Cookbook provides a practical analysis into many areas of Android application and operating system security and gives the reader the required skills to analyze the security of their Android devices.
Table of Contents (16 chapters)
Android Security Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Verifying application signatures


In the previous recipes, we walked through how applications are signed and how to generate keys securely to sign them. This recipe will provide details on how application signatures are verified. Being able to do this "by hand" is pretty important because it not only gives you insight into how verification actually works, but also serves as a gateway to deeper introspection of cryptographic application security.

Getting ready

To be able to perform this recipe, you will need the following:

  • The JDK

  • A sample signed application to verify

That's about all that you need for this one. Let's get going!

How to do it...

To verify application signatures, you will need to perform the following steps:

  1. The Java JDK has a tool called jarsigner that will be able to handle all of the hard labor; all you need to do is execute the following command:

    jarsigner –verify –verbose [path-to-your-apk]
    
  2. All you need to do now is look for the jar verified string on your screen; this indicates...