Covert Java™: Techniques for Decompiling, Patching, and Reverse Engineering

Chapter 18. Total Control with Native Code Patching

	“Every man has a scheme that will not work.”
	--Howe's Law

IN THIS CHAPTER

• Why and When to Patch Native Code 185

• Native Code Usage in the Java Virtual Machine 186

• Generic Approaches to Patching Native Methods 190

• Patching Native Code on the Windows Platform 191

• Patching Native Code on Unix Platforms 198

• Quick Quiz 199

• In Brief 200

Why and When to Patch Native Code

We have looked at various techniques for replacing, patching, and reverse engineering Java classes. All the techniques require working at the source code or bytecode level, and that has confined our capabilities to the high-level Java world. The Java Virtual Machine (JVM) interacts with the operating system (OS) via native libraries, which means ...