cryptatools-python3 0.1.13

Python Binding of the library and cryptanalysis tool 'cryptatools'.

Getting Started

This is a cryptanalysis tool for exploit developers and ctf players.

The name come from pwntools a similar tool to exploit memory corruption vulnerabilities. This software aims to work like pwntools but for cryptanalysis.

Then this program include a library like pwnlib. And it will expose some command line tools. Like pwntools. This is a rewrite of the python version in rust in order to be able to be fast and portable and usable in the following various languages rust, python, ruby, javascript and kotlin together.

Philosophy

This tool aims to be professionnal. Not only a learning tool. It is for realistic exploitation and code breaking.

You can "plug-in" your script to any protocol. Man in the midle as well as blockchain core as well as anything. Example:

• You are able to use pypcap python library to read packets and then dpkt python library to parse these and then you can use cryptatools to break encryption on these packets. This is why this library is avaible in many bindings such as python.
• You are able to use rust-web3 to parse a vulnerable cryptocurrency (shitcoin) address to lead to a double spend attack.

You can also work on programs obfuscated by encryption such as malware. In this case, you can decipher program data (eg: data contained in a dropper) as well as self-encrypyted code. In this way you can plug cryptatools with your favorite reverse engineering framwork. Eg:

• Install radare2. Then do radare2 -AA -i <yourscriptname>.rs <yourmalwaretoreverse>. If you work with python bindings, radare2 -AA -i <yourscriptname>.py <yourmalwaretoreverse>
• You can also work on extracted code from the malware:

radare2 <malwaretoreverse>; 
=> s sym.encrypted;
pr 12345 > ciphertext.bin

Where 12345 is the size of the encrypted function or code of the malware.

The library is very very flexible.

You can automatize any task. There is a command line interface.

Installation

1-Rust library installation.

Installation of cryptatools-core for rust is same for any OS. In Cargo.toml, just write:

[dependencies]
cryptatools-core = { git = "https://github.com/gogo2464/cryptatools-rs", package = 'cryptatools-core' }

2-Python binding installation.

To install the python Bindings you can use pip or build from source:

2.1-Install python Bindings from pip:

The name cryptatools-python3 is the name of the package used to install cryptatools core python bindings. In order to install it, do:

pip install cryptatools-python3

It is updated of 1 subversion on each Pull Request and is then often update by the previous version.

2.2-Build Python Bindings from sources

If you are on windows, with powershell do:

python -m venv myenv
.\myenv\Script\activate
cargo install uniffi_bindgen
pip install setuptools wheel
git clone https://github.com/gogo2464/cryptatools-rs ;
cd cryptatools-rs
python .\cryptatools-core\setup.py bdist_wheel --verbose ;
$wheelFile = Get-ChildItem -Path .\dist\ -Recurse -Include * ;
pip3 install $wheelFile --force-reinstall ;

If you are on Linux, do:

virtualenv -p python3 myenv
source myenv/bin/activate
cargo install uniffi_bindgen
pip install setuptools wheel
git clone https://github.com/gogo2464/cryptatools-rs ;
cd cryptatools-rs
python3 ./cryptatools-core/setup.py bdist_wheel --verbose ;
pip3 install ./dist/* --force-reinstall ;

If you are on MacOs, do:

virtualenv -p python3 myenv
source myenv/bin/activate
cargo install uniffi_bindgen
pip install setuptools wheel
git clone https://github.com/gogo2464/cryptatools-rs ;
cd cryptatools-rs
python3 ./cryptatools-core/setup.py bdist_wheel --verbose ;
pip3 install ./dist/* --force-reinstall ;

3-cryptatools-cli the cli intreface

Crytptatools command line interface is split into various program in order to follow the Linux philosophy. To install each one, do:

git clone https://github.com/gogo2464/cryptatools-rs/ &&
cargo install --path .\cryptatools-rs\cryptatools-cli\ ;

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Usage

</code></pre>
<p>crypytatools-cli also offers a way to script the library in command line. Do not forget to install each program. See how to install these <a href="https://github.com/gogo2464/cryptatools#installation">here</a> for more informations.</p>
<p><code>cryptatools-cli-stats</code> does cryptanalysis statistical attacks.</p>
<pre lang="shell"><code>cryptatools-cli-stats frequency-analysis "123234" '{\"a\": [\"12\"], \"b\": [\"32\"], \"c\": [\"34\"]}'

cryptatools-cli-encrypt uses cryptography algorithm to encrypt data. Obviously you can use it for brute force cryptanalysis attack. But it is not the main philosophy of cryptatools-rs.

</code></pre>
<p>For more examples, please refer to the <a href="https://github.com/gogo2464/cryptatools-rs/blob/master/TUTORIAL.md">Tutorial</a> or to the documentation <a href="https://gogo2464.github.io/cryptatools-rs/cryptatools_core/">Documentation</a>.</p>
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<!-- DOCUMENTATION EXAMPLE -->
<h2>Documentation</h2>
<p><code>cryptatools-core</code> is a well documented project.</p>
<p>In order to see the cryptatools documentation. See: <a href="https://gogo2464.github.io/cryptatools-rs/cryptatools_core/">the API documentation</a></p>
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<!-- CONTRIBUTING -->
<h2>Contributing</h2>
<p>Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are <strong>greatly appreciated</strong>.</p>
<p>If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement".
Don't forget to give the project a star! Thanks again!</p>
<ol>
<li>Document your work. See <a href="https://github.com/gogo2464/cryptatools-rs#1-documentation">the how to make good documentation</a> chapter.</li>
<li>For each method or object implemented, do not forget to make tests with doctest. See <a href="https://github.com/gogo2464/cryptatools-rs#2-testing">here</a>.</li>
<li>Create Python binding. See <a href="https://github.com/gogo2464/cryptatools-rs#3-create-python-bindings">this link</a>.</li>
<li>Benchmark your work. See <a href="https://github.com/gogo2464/cryptatools-rs#4-benchmarking">this link</a>.</li>
<li>Create cli interface. See <a href="https://github.com/gogo2464/cryptatools-rs#5-create-cli">This link</a>.</li>
<li>Open PR.</li>
</ol>
<!-- DOCUMENTATION EXAMPLE -->
<h2>1-Documentation</h2>
<p>The documentation is generated by doctstring with rustdoc. To edit the documentation, go to the code and modify the doctstring after <code>///</code>.</p>
<p>Then, in order to generate documentation from root folder do:</p>
<pre lang="shell"><code>cargo doc --all

Fell free to view your own doc with

cargo doc --open --all

This project uses cargo doc.

The documentation is self-generated on each pull request.

To check if the cryptatools documentation has been updated after a merge request, see: the API documentation.

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2-Testing

In order to run unit tests, you MUST be in the directory cryptatools-rs. Run unit tests with doctests with the command:

cargo test --all

Unit test are made with doctests.

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3-Create Python bindings.

Cryptatools relies on uniffi to provide bindings to Python3. Ensure to provide Python3 bindings before making your Pull Request.

To create Python Bindings, edit the file cryptatools-rs/src/cryptatools.udl. Edit it to add your newly created object as mentionned in the official uniffi documentation at this address: https://mozilla.github.io/uniffi-rs/udl_file_spec.html.

Then do not forget to edit the file cryptatools-rs/cryptatools-core/src/lib.rs and just before the:

uniffi_macros::include_scaffolding!("cryptatools");

This step will generate a single python file that you could import directly. Sadly the good pratice you must do to import these is a bit more complicated.

cryptatools-rs\cryptatools-core\setup.py

In order to import your own crate, create the corresponding python file or folders under cryptatools-rs\cryptatools-core\bindings\python3\cryptatools-core\cryptanalysis\. Here you need to import the necessary objects from from cryptatools_core.python3_bindings. Example, in the file cryptatools-rs\cryptatools-core\bindings\python3\cryptatools-core\cryptography\encryption\monoalphabetic_cipher\caesar_number.py we just have written: from cryptatools_core.python3_bindings import CaesarNumberAlgorithm.

Once this is done, fell free to write unit tests. At least one for each method implemented. The tests are writtenh in the file cryptatools-rs\cryptatools-core\binding-testing\testing.py.

You are now free to test and compile your code with the documentation at this link.

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4-Benchmarking

Sometimes, a function could sepnd too much time. In this case, you can debug your specific function from the template in the file benches\cryptatools_benchmark\main.rs.

Then test your function with:

cargo bench

In the current state of cryptatools, it is not mandatory from a pull request to benchmark all the code. But could be considered as a good improvment.

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5-Create cli.

Each feature from cryptatools-core will be implemented to the cli in the folder cryptatools-cli. When you will have finish to implement your feature in incryptatools-core and when you have finish your feature in Python bindings, fell free to create the cli of your modifications.

Then test it with:

cargo install --path .\cryptatools-cli\ ;

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License

This software has a free software (libre) license. The license is GPL3.

Fell free to ask me if you absolutely want to get a double licensing name. Then I could choose.

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Contact

gogo - [e-mail]

Project Link: https://github.com/gogo2464/cryptatools-rs

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