Reverse engineering Java bytecode in Rust

Published: 25 December 2023
on channel: DcraftBg

Today we're continuing to parse Javas' bytecode and doing it all in Rust. We end up creating a nice API to parse Java files into more "readable" ways. Even disassembling the code of individual opcodes down to their respective instructions.

00:00:00 - Intro
00:00:36 - Off camera changes
00:01:34 - from_bytes convention
00:03:50 - What's a Constant pool
00:06:00 - Logging convention
00:06:25 - attributes_log
00:08:48 - How to log curly braces
00:11:50 - What's inside attributes
00:13:30 - Reverse engineering SourceFile
00:14:18 - Oops, No mic
00:15:00 - Ok...
00:17:50 - Very primitive Attributes
00:20:00 - SourceFile attribute
00:21:37 - Some advice for designing APIs
00:23:24 - sizeof doesn't work with variants
00:25:21 - Updating attributes log
00:29:00 - The log function
00:32:00 - Parsing the code
01:03:34 - Parsing Instructions
01:05:15 - Opcodes ≠ instructions
01:10:00 - Parsing the rest
01:22:30 - Outro

Resources:
Watch the playlist from the start: • Breaking Java in Rust
Java bytecode docs: https://docs.oracle.com/javase/specs/...

#coding #java #rust

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