# SETools: Policy analysis tools for SELinux

## Overview

This file describes SETools.  SETools is a collection of graphical tools,
command-line tools, and libraries designed to facilitate SELinux policy
analysis.  Please consult the KNOWN-BUGS file prior to reporting bugs.

## Installation

SETools uses the Python setuptools build system to build, and install.
As such it contains a setup.py script that will install the tools.

To run SETools basic command line tools, the following packages are required:

* Python 3.10+
* setuptools
* libselinux
* libsepol 3.9+

To run SETools graph-based analysis, domain transition and information flow,
the following packages are also required:

* NetworkX 2.6+
* pygraphviz (optional, for graphical output)

To run SETools graphical tools, the following packages are also required:

* PyQt6

To run SETools AI tools, the following packages are also required:

* mcp

To build SETools, the following development packages are required, in
addition to the development packages from the above list:

* gcc
* cython 0.29.14 (only if regenerating setools/policyrep.c)

To run SETools unit tests, the following packages are required, in
addition to the above dependencies:

* pytest
* tox (optional)

### Obtaining SETools

SETools is included in most Linux distributions which support
SELinux, such as Fedora, Red Hat Enterprise Linux, Gentoo,
and Debian.

Official releases of SETools may be freely downloaded from the
[GitHub releases page](https://github.com/SELinuxProject/setools/releases).

SETools source code is maintained within a GitHub repository.
From the command line do:

```bash
  $ git clone https://github.com/SELinuxProject/setools.git
```

You may also browse the [GitHub repository](https://github.com/SELinuxProject/setools).
The master branch has development code that may not be stable.  Each release
series is considered stable, and has its own branch, e.g. "4.0" for all
4.0.* releases.  To checkout a stable branch, do:

```bash
  $ git checkout 4.0
```

Where `4.0` is the release series.  Each release will have a tag.

### Installing SETools

The SETools source distribution is a Python sdist and can be installed using
pip.

```bash
  $ sudo pip install setools-4.7.0.tar.bz2
```

### Regenerating C Extension

The SETools policy representation library is implemented as a Python C
extension using Cython. The source distribution includes pre-generated C source
for this extension.  To regenerate it and install the package, unpack the
source distribution, install Cython, and run the following commands:

```bash
  $ python setup.py clean --all
  $ sudo pip install .
```

### Building SETools for Local Use

To use SETools locally, without installing it onto the system,
unpack the official distribution or check out the git repository,
and perform the following at the root:

```bash
  $ python setup.py build_ext -i
```

This will compile the C portion of SETools locally, and then
the tools can be ran from the current directory (e.g. `./seinfo`).

### Building SETools with a Local Libsepol and Libselinux

At times, SETools requires a newer libsepol than is available from
distributions.  To use a locally-built libsepol instead of the libsepol
provided by the Linux distribution, build the libsepol sources and then
set the `USERSPACE_SRC` environmental variable to the path to the root of
SELinux userspace source tree. The libsepol and libselinux must already
be compiled.

```bash
  $ export USERSPACE_SRC=/home/user/src/selinux
  $ pip install --user setools-4.7.0.tar.bz2
```

This feature assumes that the directory structure at `$USERSPACE_SRC` is the
same as the SELinux userspace code checked out from GitHub.

Since SETools is dynamically linked to libsepol and libselinux, you must
specify the path to the libsepol/src and libselinux/src directories by
using `LD_LIBRARY_PATH` so that the newer versions of the libraries are used.

```bash
  $ export LD_LIBRARY_PATH="/home/user/src/selinux/libsepol/src:/home/user/src/selinux/libselinux/src"
  $ seinfo policy.31
  $ sesearch -A sysadm_t policy.31
```

### Installation Options

Please see `python setup.py --help` or `python setup.py install --help`
for up-to-date information on build and install options, respectively.

### Unit Tests

One goal for SETools is to provide confidence in the validity of the
output for the tools.  The unit tests for SETools can be run with
the following commands:

```bash
  $ python setup.py build_ext -i
  $ pytest tests
```

## Features

SETools encompasses a number of tools, both graphical and command
line, and libraries.  Many of the programs have help files accessible
during runtime.

### Graphical tools

Tool Name  | Use
---------- | -------------------------------------------
apol       | A Qt graphical analysis tool.  Use it to perform various types of analyses.

### Command-line tools

Tool Name  | Use
---------- | -------------------------------------------
sechecker  | Configuration file-driven automated analysis.
sediff     | Compare two policies to find differences.
sedta      | Perform domain transition analyses.
seinfo     | List policy components.
seinfoflow | Perform information flow analyses.
sesearch   | Search rules (allow, type_transition, etc.)

### AI tools

Tool Name   | Use
----------- | -------------------------------------------
setools-mcp | A model context protocol server providing analysis tools to LLMs.

### Analysis Libraries

The SETools libraries are available for use in third-party
applications.  Although this is not officially supported, we will
do our best to maintain API stability.

### Reporting bugs

Bugs can be reported in the [SETools GitHub issues tracker](https://github.com/SELinuxProject/setools/issues).

### Copyright license

The intent is to allow free use of this source code.  All programs'
source files are copyright protected and freely distributed under the
GNU General Public License (see `COPYING.GPL`).  All library source
files are copyright under the GNU Lesser General Public License (see
`COPYING.LGPL`).  All files distributed with this package indicate the
appropriate license to use.  Absolutely no warranty is provided or implied.
