ahmed-jishan / decoder-plus-plus

An extensible application for penetration testers and software developers to decode/encode data into various formats.

Decoder++

An extensible application for penetration testers and software developers to decode/encode data into various formats.

Setup

To install Decoder++ simply use pip:

# Install using pip (latest:qt6)
pip3 install decoder-plus-plus[qt6]

# Install using pip (backport:qt5)
pip3 install decoder-plus-plus[qt5]

Note, that this will install Decoder++ and the most common plugins. In order to install and use all available plugins the package decoder-plus-plus[extras] needs to be installed:

pip3 install decoder-plus-plus[extras]

Please refer to the Installation Guide for more information regarding individual setups.

Overview

This section provides an overview about the individual ways of interacting with Decoder++. For additional usage information check out the Advanced Usage section.

Graphical User Interface

The graphical user interface provides two distinct interaction modes: a main-window-mode and a dialog-mode.

While the main-window-mode supports tabbing, the dialog-mode has the ability to return the transformed content to stdout ready for further processing. As a result Decoder++ can enhance other tools/scripts by providing a graphical user interface for flexible transformation of any input.

Command Line

In addition to the graphical user interface Decoder++ also provides a command line interface:

$ dpp -e base64 -h sha1 "Hello, world!"
e52d74c6d046c390345ae4343406b99587f2af0d

Features

• User Interfaces:
  • Graphical User Interface
  • Command Line Interface
• Preinstalled Scripts and Codecs:
  • Encode/Decode: Base16, Base32, Base45, Base64, Base64 (URL-safe), Binary, Gzip, Hex, Html, JWT, HTTP64, Octal, Url, Url+, Zlib
  • Hashing: Adler-32, Apache-Md5, CRC32, FreeBSD-NT, Keccak224, Keccak256, Keccak384, Keccak512, LM, Md2, Md4, Md5, NT, PHPass, RipeMd160, Sha1, Sha3 224, Sha3 256, Sha3 384, Sha3 512, Sha224, Sha256, Sha348, Sha512, Sun Md5
  • Scripts: CSS-Minify, Caesar, Extract URLs, Filter-Lines, Identify File Format, Identify Hash Format, JS-Beautifier, JS-to-XML, JQ, JSONify, JSONPath, HTML-Beautifier, Little/Big-Endian Transform, Reformat Text, Remove Newlines, Remove Whitespaces, Search and Replace, Split and Rejoin, Unescape/Escape String, XPath
• Format-Identification
• Smart-Decode
• Plugin System
• Load & Save Current Session
• Supported Platforms:
  • Windows
  • Linux
  • MAC

Advanced Usage

This section provides additional information about how the command line interface can be used.

Command Line Interface

The commandline interface gives easy access to all available codecs.

To list them the -l argument can be used. To narrow down the search the -l argument accepts additional parameters which work as filter:

$ dpp -l base enc

Codec                 Type
-----                 ----
base16                encoder
base32                encoder
base64                encoder

Decoder++ distinguishes between encoders, decoders, hashers and scripts. Like the graphical user interface the command line interface allows the usage of multiple codecs in a row:

$ dpp "H4sIAAXmeVsC//NIzcnJ11Eozy/KSVEEAObG5usNAAAA" -d base64 -d gzip
Hello, world!

While encoders, decoders and hashers can be used right away, some scripts may require additional configuration. To show all available options of a specific script add the help parameter:

$ dpp "Hello, world!" -s split_and_rejoin help

Split & Rejoin
==============

             Name  Value  Group            Required  Description
             ----  -----  -----            --------  -----------
   split_by_chars         split_behaviour  yes       the chars used at which to split the text
  split_by_length  0      split_behaviour  yes       the length used at which to split the text
rejoin_with_chars                          yes       the chars used to join the splitted text

To configure a specific script the individual options need to be supplied as name-value pairs (e.g. search_term="Hello"):

$ dpp "Hello, world!" -s search_and_replace search_term="Hello" replace_term="Hey"
Hey, world!

Contribute

Feel free to open a new ticket for requesting features or reporting bugs. Also don't hesitate to issue a pull-request for new features/plugins. More information regarding Decoder++ development can be found in the Development Guide.

Thanks to

• Tim Menapace (RIPEMD160, KECCAK256)
• Robin Krumnow (ROT13)

Troubleshooting

Signals are not working on Mac OS

When starting Decoder++ in Mac OS signals are not working.

This might happen when PyQt6 is installed using homebrew.

Can not start Decoder++ in Windows using CygWin

When starting Decoder++ in CygWin an error occurs:

  ModuleNotFoundError: No module named 'PyQt6'

This might happen even if PyQt6 is installed using pip. Currently there is no fix for that. Instead it is recommended to start Decoder++ using the Windows command line.

No Module PyQt6

When starting Decoder++ the error No module named 'PyQt6.sig' is displayed on the console. This may happen when there are competing versions of PyQt6 installed. Reinstalling PyQt6 should fix this error.

$ sudo pip3 uninstall PyQt6
$ sudo pip3 install PyQt6

Missing Qt6 libraries

At least in Ubuntu 22.04 it might be necessary to install the following packages using apt:

apt install libqt6core6 libqt6network6 libqt6openglwidgets6 libqt6widgets6

X11-forwarding fails

In order to run dpp inside a container/virtual machine you may need to install the qt6-qpa-plugins inside the container/virtual machine and configure the QT_QPA_PLATFORM_PLUGIN_PATH accordingly:

apt install qt6-qpa-plugins
export QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/qt6/plugins/platforms/

See the Docker build and run scripts for more information regarding how to build and run a Decoder++ Docker container.

Inspired By

• PortSwigger's Burp Decoder

Powered By

• QtPy / PyQt5 / PyQt6
• QtAwesome