The Bytecode Club - Reverse Engineering Forum - Java Projects / Libraries

Class-File-Searcher - Dump Classfiles & Strings from arbitrary data

Sat, 20 Jul 2024 17:17:09 +0000

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

Features
+ Search and dump class-files from arbitrary data.
+ Optionally dump the Strings from any found classes.
+ All classes are sorted by package folder to make it easier to manage large class-file dumps.

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.

Click here to view the project source code

Click here to download the latest release

How To Install
+ Download the latest release
+ Install it to your system-path

Media

Antivirus+ - Antivirus Written In Java

Sat, 13 Jul 2024 19:17:52 +0000

General Features
+ Mixes both static and dynamic file scanning
+ Built on top of existing AV databases & tools
+ Experimental modules
+ Large signature database
+ The tool is still early in development

Notes
+ Use in combination with Windows Defender or another trusted Antivirus
+ Quarantine does not actually quarantine - Until we can rule out false positives from the yara rules we probably won't have a realtime quarantine
+ Instead, we have a passive quarantine that requires the user to decide if they want to remove the files or not

Click here to view the project source code

Click here to download the latest release

How To Install
+ Install the latest JRE (Must be on Java 8 or higher)
+ Download the latest release
+ Run the latest release
+ You'll have to wait for the initial download to finish before you can scan
+ Due to the signature database size this can be up to an hour
+ Report all issues here

Media

Malbolge.c4J - Malbolge '98 interpreter ported over to Java.

Sat, 07 Oct 2023 20:51:56 +0000

Malbolge.c4J is written to be an authentic port of the original '98 malbolge.c to Java.

The goal was to preserve as much of the original C as possible, doing the minimum required changes to port it over to Java.

Click here to view the project source code

Click here to download the latest release

How To Use
Start by downloading the latest release, then download a malbolge script to run.

hello_world.malbolge

Code:
('&%:9]!~}|z2Vxwv-,POqponl$Hjig%eB@@>}=
`CB]V?Tx

Code:
java -jar Malbolge.c4J.jar hello_world.malbolge

This will interpret the malbolge script.

Media

OpenIRCd - Java IRC Server

Sun, 05 Mar 2023 21:50:39 +0000

OpenIRCd is a NIO IRC server I've been working on for a few days, it's fairly incomplete and is in the early stages of development.

Click here to view the project source code

Click here to download the latest release

How To Use
Start by downloading the latest release, then you can launch the IRCd using the Java -jar flag.

Code:
java -jar OpenIRCd-v0.1.0.jar

This will create the default config under ./config.ini
Adjust the configuration as needed, then restart the server.

Java Echo Server

Fri, 03 Mar 2023 19:23:46 +0000

CR Echo Server is a low-level non-blocking echo server.

It will echo-back the contents of the buffer if it has reached 1024 characters, or encountered a carriage return.

Click here to view the project source code

How To Use

You can run the Java Jar file directly, or you can use it as a library

Code:
CREchoServer server = new CREchoServer(7, 1);

server.start();

Using telnet you can easily test the server.

Code:
telnet localhost 7

Vortex IO - Java NIO server

Fri, 03 Mar 2023 19:19:57 +0000

About: Vortex IO is an easy-to-use zero dependency low-level non-blocking socket server API for Java.
License: MIT License
Source: https://konloch.com/Vortex-IO/
Download Jar: https://konloch.com/Vortex-IO/releases/
Add as maven dependency:

Code:

  com.konloch

  Socket-Server

  0.9.4

Echo Server Example
Click here for an echo server example.

This is currently still in development.

Post Your Java Project

Fri, 03 Mar 2023 19:15:57 +0000

If you have created any kind of project in Java feel free to post it here to help spread the word.

DSLBuilder- Domain Specific Language Building API

Sun, 19 Feb 2023 11:34:33 +0000

About: Pure Java zero dependency domain specific language builder API with it's own runtime.
License: MIT License
Source: https://konloch.com/DSLBuilder/
Download Jar: https://konloch.com/DSLBuilder/releases/
Add as maven dependency:

Code:

  com.konloch

  DSLBuilder

  1.0.0

DSLBuilder Example
Click here to view an example DSL implementation using DSLBuilder

StringVars - Java Solution for Recursive String Replacement ($var$, %var%)

Sat, 18 Feb 2023 21:45:04 +0000

About: StringVars is a zero dependency pure Java solution to create recursive String variables, such as $var$ or %var%.
License: Public Domain
Source: https://konloch.com/StringVars/
Download Jar: https://konloch.com/StringVars/releases/
Add as maven dependency:

Code:

  com.konloch

  StringVars

  1.0.0

Implementation Example
Click here for the StringHolderExample class

Code:
StringHolderExample example = new StringHolderExample()

{

 @Override

 public String getString(String key)

 {

 return StringVars.getVariableValue('$', ()-> getMap().get(key),(vkey)-> getMap().get(vkey));

 }

};

example.getMap().put("example", "Example: $var$");

example.getMap().put("var", "This is a great example of how it functions!");

System.out.println("Results: " + example.getString("example"));

DynVarMap - Persistent Key Value Storage

Fri, 17 Feb 2023 06:28:19 +0000

About: DynVarMap is zero dependency easy and straight forward way to manage attribute-like runtime variables for Java.
License: MIT License
Source: https://konloch.com/DynVarMap/
Download Jar: https://konloch.com/DynVarMap/releases/
Add as maven dependency:

Code:

  com.konloch

  DynVarMap

  1.0.0

Creating a new instance
To create a new instance all you need to do is create a new VarMap object.

Code:
VarMap map = new VarMap();

Creating & accessing new variables
To create a new variable all you need to do is define the type first, then enter the unique variable name you would like to use.

Code:
boolean booleanValue = map.getBoolean("githubBoolExample");

To supply a default value you can do it while grabbing the value.

Code:
boolean booleanValue = map.getBoolean("githubBoolExample", false);

To access the DynVarMap field, you need to call upon the getVar* function. This exposes the API to allow method chaining on the variable.

Code:
boolean booleanValue = map.getVarBoolean("githubBoolExample", false).get();

To fully leverage DynVarMap the trick is to chain methods to create easy-to-read one liners.

Code:
//create a new variable if it doesn't exist yet and check if it's been set to true, if it has execute the code below

if(map.getVarBoolean("githubBoolExample").get())

//create a new variable if it doesn't exist yet, check if it's been set as true, if it hasn't execute the code below, either way set it to being set as true

if(!map.getVarBoolean("githubBoolExample").getThenSet(true))

//create a new variable if it doesn't exist yet, add one, check if it equals any of the numbers, if it does execute the code below

if(map.getVarInt("githubIntExample").add(1).equals(13, 21, 34, 55, 89))

Time & Custom Types
DynVarMap supports custom types, one built-in example common is system time interaction. The Time type is based on the Long type, this means it comes with all of the helper functions such as add, subtract, divide and multiply.

Code:
map.getTime("githubTimeExample").setNow(); //set the stop-watch to start counting now

if(map.getVarTime("githubTimeExample").hasPassed(30_000)) //return true if 30 seconds have passed

Serializing/saving & loading from disk
You can serialize the map using the built-in serializer, it uses it's own format similar to .ini. Deserializing supports .ini format as well if you perfer to have hand-written configurations.

Code:
new VarMapSerializer("map.ini", map, true).save();

new VarMapSerializer("map.ini", map, true).load();

FastStringUtils - Fast String Utilities (Split without regex)

Fri, 17 Feb 2023 06:16:31 +0000

About: FastStringUtils is an easy-to-use zero dependency collection of very fast String utility functions for Java.
License: MIT License
Source: https://konloch.com/FastStringUtils/
Download Jar: https://konloch.com/FastStringUtils/releases/
Add as maven dependency:

Code:

  com.konloch

  FastStringUtils

  1.0.0

Splitting a String with a supplied separator

Code:
//split the string using the space character as a separator

String[] simpleSplitExample = FastStringUtils.split("Split Example", " ");

//split the string using the space character as a separator, with a maximum search limit of 2

String[] limiterSplitExample = FastStringUtils.split("Split Example With A Limit ", " ", 2);

//split the string using the space character as a separator, with a maximum search limit of 2, and preserve the separator

String[] limiterSplitExamplePreseveSeparator = FastStringUtils.split("Split Example With A Limit ", " ", 2, true);

DiskLib - File Reader & Writer (Easy to use API)

Fri, 17 Feb 2023 05:56:27 +0000

About: DiskLib is an easy to use zero dependency Disk Writer & Disk Reader with built in GZIP support for Java.
License: MIT License
Source: https://konloch.com/DiskLib/
Download Jar: https://konloch.com/DiskLib/releases/
Add as maven dependency:

Code:

  com.konloch

  DiskLib

  1.0.1

Write new file to disk / overwrite existing file

Code:
DiskReader.write("hello.txt", "Hello ");

Append to existing file

Code:
DiskReader.append("hello.txt", "World");

Reading Strings from disk

Code:
ArrayList lines = DiskReader.read("hello.txt");

Reading String Arrays from disk

Code:
String[] lines = DiskReader.readLines("hello.txt");

Reading Bytes from disk

Code:
byte[] bytes = DiskReader.readBytes("hello.txt");

HTTPRequest - HTTP Request wrapper (Easy to use API)

Fri, 17 Feb 2023 05:50:49 +0000

About: HTTPRequest is an easy-to-use zero dependency Java wrapper to read from a URL. Support for Cookies, proxies, UserAgent, post data and more.
License: MIT License
Source: https://konloch.com/HTTPRequest/
Download Jar: https://konloch.com/HTTPRequest/releases/
Add as maven dependency:

Code:

  com.konloch

  HTTPRequest

  2.0.0

How to preform a simple request

Code:
HTTPRequest request = new HTTPRequest(new URL("https://google.com/"));

ArrayList webpage = request.read();

for(String line : webpage)

    System.out.println(line);

How to preform a more complex request

Code:
HTTPRequest request = new HTTPRequest(new URL("https://google.com/"));

request.setTimeout(10000);

request.setPostData("postdata=yes&awesome=yup");

request.setReferer("http://google.com/");

request.setCookie("cookies=yes;cool=sure");

request.setProxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress("127.0.0.1", 81)));

ArrayList webpage = request.read();

for(String line : webpage)

    System.out.println(line);

for (Map.Entry> k : request.getLastConnectionHeaders())

    System.out.println("Header Value:" + k.toString());

Post Your Java Library

Fri, 17 Feb 2023 05:43:34 +0000

If you are a Java library author feel free to post your library here to help spread the word.

Here is a thread template to use when posting:

Code:
[b]About:[/b] Description goes here

[b]License:[/b] License info goes here

[b]Source:[/b] Source link goes here

[b]Download Jar:[/b] Releases goes here

[b]Add as maven dependency:[/b]

[code]

  your-group-id

  your-artifact-id

  your-version

[\/code]

[b]any-title of a code example implementation of your library[/b]

any explanation

[code]

any code example

[\/code]

For the ending code tag remove the \ character.