Nebulous

A simple and small Java bytecode obfuscator written in Kotlin.

List of transformers

StringPooler
StringEncryptor
StringSplitter (very stupid, shouldn't use except for testing)
NumberPooler
FieldRenamer
MethodRenamer
ClassRenamer
MemberShuffler
FullAccessFlags
DebugInfoRemover
NOPRemover
LineNumberRemover
GotoInliner
GotoReturnInliner

Use

To run nebulous, you must first create a json config file with the template below. You can omit any transformers and they will be automatically set to false.

Example config.json:

{
    "input": "input.jar",
    "output": "output.jar",
    "libraries": [
    	"/path/to/external/dependency/"
    ],
    "exclusions": [
        "some/package/path/",
        "some/actual/Class"
    ],
    "StringPooler": true,
    "StringEncryptor": true,
    "NumberPooler": true,
    "FieldRenamer": true,
    "MethodRenamer": true,
    "ClassRenamer": true,
    "ClassRenamerPrefix": "dev/tigr/ares/",
    "MemberShuffler": true,
    "FullAccessFlags": true,
    "DebugInfoRemover": true,
    "NOPRemover": true,
    "LineNumberRemover": true,
    "GotoInliner": true,
    "GotoReturnInliner": true
}

Then to run it:

java -jar nebulous.jar config.json

Credit

Credit to jasmo and radon for being helpful to learn obfuscation techniques

MayIHaveK/nebulous

Nebulous

List of transformers

Use

Credit