https://github.com/konloch/class-file-searcher

Dump Classfiles & Strings from arbitrary data
https://github.com/konloch/class-file-searcher

class-dump class-file dump dumper java java-classes reverse-engineering

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Dump Classfiles & Strings from arbitrary data

• Host: GitHub
• URL: https://github.com/konloch/class-file-searcher
• Owner: Konloch
• License: mit
• Created: 2024-07-20T16:11:26.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2024-07-20T17:10:00.000Z (almost 2 years ago)
• Last Synced: 2025-12-02T00:31:17.807Z (7 months ago)
• Topics: class-dump, class-file, dump, dumper, java, java-classes, reverse-engineering
• Language: Java
• Homepage: https://konloch.com/Class-File-Searcher
• Size: 9.41 MB
• Stars: 7
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Class-File-Searcher

Command-line tool for dumping Class-files & Strings from arbitrary data

![Screenshot-1](./.github/screenshot-1.gif)

## How To Install

+ [Download the latest release for your platform](https://github.com/Konloch/Class-File-Searcher/releases/latest)

+ Add the binary to your system-path

  + Or just call the absolute path to it in the command line

## How To Use - Count Class Files (Initial first look)

+ `cfs count input.bin` - Searches for classes inside the file input.bin

+ `cfs count input-p1.bin input-p2.bin` - Searches for classes inside the two files input-p1.bin & input-p2.bin

+ `cfs count *.bin` - Searches for classes in all files in the current path that end in .bin (non-recursive)

+ `cfs count dir/` - Searches for classes in the specified folder

## How To Use - Dump Strings From Found Class Files (Peak what's inside)

+ `cfs classes input.bin` - Searches for strings from classes inside the file input.bin

+ `cfs classes input-p1.bin input-p2.bin` - Searches for strings from classes inside the two files input-p1.bin & input-p2.bin

+ `cfs classes *.bin` - Searches for strings from classes in all files in the current path that end in .bin (non-recursive)

+ `cfs classes dir/` - Searches for strings from classes in the specified folder

## How To Use - Dump Class Files (Full dive with a decompiler)

+ `cfs classes input.bin` - Searches for classes inside the file input.bin

+ `cfs classes input-p1.bin input-p2.bin` - Searches for classes inside the two files input-p1.bin & input-p2.bin

+ `cfs classes *.bin` - Searches for classes in all files in the current path that end in .bin (non-recursive)

+ `cfs classes dir/` - Searches for classes in the specified folder

## How Does It Work?

+ We search for all instances of 'CAFEBABE' and store the data between each file, assuming the files are stored back to back.

+ We make the following assumptions:

  + It's uncompressed data

  + It's not lying to us when it says 'CAFEBABE'

  + The files are stored back to back, I.E. each chunk of 'CAFEBABE' represents another class once reached.

## Notes

+ We're resistant to most obfuscation, but if you find something that breaks CFS feel free to report the issue.