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## Piston
<h1 align="center">Piston</h1>
<h1 align="center">
<br>
<a href="https://github.com/engineer-man/piston"><img src="https://emkc.org/images/icon_circle_64.png" alt="engineer-man piston"></a>
</h1>
<h3 align="center">A high performance general purpose code execution engine.</h3>
<br>
<p align="center">
<a href="https://github.com/ArmynC/ArminC-AutoExec/commits/master">
<img src="https://img.shields.io/github/last-commit/engineer-man/piston.svg?style=for-the-badge&logo=github&logoColor=white"
alt="GitHub last commit">
<a href="https://github.com/engineer-man/piston/issues">
<img src="https://img.shields.io/github/issues/engineer-man/piston.svg?style=for-the-badge&logo=github&logoColor=white"
alt="GitHub issues">
<a href="https://github.com/engineer-man/piston/pulls">
<img src="https://img.shields.io/github/issues-pr-raw/engineer-man/piston.svg?style=for-the-badge&logo=github&logoColor=white"
alt="GitHub pull requests">
</p>
---
<h4 align="center">
<a href="#About">About</a>
<a href="#Public-API">Public API</a>
<a href="#Getting-Started">Getting Started</a>
<a href="#Usage">Usage</a>
<a href="#Supported-Languages">Supported Languages</a>
<a href="#Principle-of-Operation">Principles</a>
<a href="#Security">Security</a>
<a href="#License">License</a>
</h4>
---
<br>
# About
<h4>
Piston is a high performance general purpose code execution engine. It excels at running untrusted and
possibly malicious code without fear from any harmful effects.
It's used in numerous places including
[EMKC Challenges](https://emkc.org/challenges),
[EMKC Weekly Contests](https://emkc.org/contests), the
[Engineer Man Discord Server](https://discord.gg/engineerman) via
[I Run Code](https://github.com/engineer-man/piston-bot) bot as well as 1300+ other servers
and 100+ direct integrations. To get it in your own server, go here: https://emkc.org/run.
</h4>
<br>
#### Use Public API
Requires no installation and you can use it immediately. Reference the Versions/Execute sections
below to learn about the request and response formats.
- `GET` `https://emkc.org/api/v1/piston/versions`
- `POST` `https://emkc.org/api/v1/piston/execute`
It's used in numerous places including:
* [EMKC Challenges](https://emkc.org/challenges),
* [EMKC Weekly Contests](https://emkc.org/contests),
* [Engineer Man Discord Server](https://discord.gg/engineerman),
* [I Run Code (Discord Bot)](https://github.com/engineer-man/piston-bot) bot as well as 1300+ other servers
and 100+ direct integrations.
Important Note: The Piston API is rate limited to 5 requests per second. If you have a need for more requests than that
To get it in your own server, go here: https://emkc.org/run.
<br>
# Public API
- Requires no installation and you can use it immediately.
- Reference the Versions/Execute sections below to learn about the request and response formats.
<br>
When using the public Piston API, use the base URL:
```
https://emkc.org/api/v1/piston
```
#### GET
```
https://emkc.org/api/v1/piston/versions
```
#### POST
```
https://emkc.org/api/v1/piston/execute
```
> Important Note: The Piston API is rate limited to 5 requests per second. If you have a need for more requests than that
and it's for a good cause, please reach out to me (EngineerMan#0001) on [Discord](https://discord.gg/engineerman)
so we can discuss potentially getting you an unlimited key.
#### Cloning and System Dependencies
```
# clone and enter repo
git clone https://github.com/engineer-man/piston
cd piston/lxc
<br>
# Getting Started
### Host System Package Dependencies
* NodeJS
* lxc
* libvirt
<br>
If your OS is not documented below, please open pull requests with the correct commands for your OS.
<details>
<summary><span style="font-size:1.43em;">CentOS / RHEL</span></summary>
```sh
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash
nvm install --lts
nvm use --lts
# centos/rhel dependencies:
yum install -y epel-release
yum install -y lxc lxc-templates debootstrap libvirt
systemctl start libvirtd
```
</details>
# ubuntu server 18.04 dependencies:
apt install lxc lxc-templates debootstrap libvirt0
<details>
<summary><span style="font-size:1.43em;">Ubuntu (18.04)</span></summary>
```sh
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash
nvm install --lts
nvm use --lts
apt install -y lxc lxc-templates debootstrap libvirt0
```
</details>
<details>
<summary><span style="font-size:1.43em;">Arch Linux</span></summary>
```sh
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash
nvm install --lts
nvm use --lts
# arch dependencies:
sudo pacman -S lxc libvirt unzip
```
</details>
# everything else:
# not documented, please open pull requests with commands for debian/arch/macos/etc
#### After system dependencies are installed, clone this repository:
```sh
# clone and enter repo
git clone https://github.com/engineer-man/piston
cd piston/lxc
```
#### Installation (simple)
Coming soon.
#### Installation (advanced/manual)
See `var/install.txt` for how to create a new LXC container and install all of the required
- Coming soon.
#### Installation (advanced)
- See `var/install.txt` for how to create a new LXC container and install all of the required
software.
#### CLI Usage
- `lxc/execute [language] [file path] [args]`
<br>
#### API Usage
# Usage
### CLI
```sh
lxc/execute [language] [file path] [args]
```
### API
To use the API, it must first be started. Please note that if root is required to access
LXC then the API must also be running as root. To start the API, run the following:
```
cd api
./start
```
#### Base URLs
When using the public Piston API, use:
```
https://emkc.org/api/v1/piston
```
For your own local installation, use:
For your own local installation, the API is available at</h3>
```
http://127.0.0.1:2000
```
@ -135,44 +242,38 @@ Content-Type: application/json
}
```
#### Supported Languages
- awk
- bash
- brainfuck
- c
- cpp
- csharp
- deno
- erlang
- elixir
- emacs
- elisp
- go
- haskell
- java
- jelly
- julia
- kotlin
- lua
- nasm
- node
- paradoc
- perl
- php
- python2
- python3
- ruby
- rust
- swift
- typescript
<br>
#### Principle of Operation
# Supported Languages
| | |
|:---------:|------------|
| awk | julia |
| bash | kotlin |
| brainfuck | lua |
| c | nasm |
| cpp | node |
| csharp | paradoc |
| deno | perl |
| erlang | php |
| elixir | python2 |
| emacs | python3 |
| elisp | ruby |
| go | rust |
| haskell | swift |
| java | typescript |
| jelly | |
<br>
# Principle of Operation
Piston utilizes LXC as the primary mechanism for sandboxing. There is a small API written in Node which takes
in execution requests and executes them in the container. High level, the API writes
a temporary source and args file to `/tmp` and that gets mounted read-only along with the execution scripts into the container.
The source file is either ran or compiled and ran (in the case of languages like c, c++, c#, go, etc.).
#### Security
<br>
# Security
LXC provides a great deal of security out of the box in that it's separate from the system.
Piston takes additional steps to make it resistant to
various privilege escalation, denial-of-service, and resource saturation threats. These steps include:
@ -186,5 +287,7 @@ various privilege escalation, denial-of-service, and resource saturation threats
- Capping stdout to 65536 characters (resists yes/no bombs and runaway output)
- SIGKILLing misbehaving code
#### License
<br>
# License
Piston is licensed under the MIT license.