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Test suite for Capsicum

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# Capsicum User Space Tests

***

**NOTE: This repository is no longer maintained.
[FreeBSD](https://cgit.freebsd.org/src/tree/tests/sys/capsicum) now holds the source-of-truth for
the Capsicum test suite.**

***

This directory holds unit tests for [Capsicum](http://www.cl.cam.ac.uk/research/security/capsicum/)
object-capabilities. The tests exercise the syscall interface to a Capsicum-enabled operating system,
currently either [FreeBSD >=10.x](http://www.freebsd.org) or a modified Linux kernel (the
[capsicum-linux](http://github.com/google/capsicum-linux) project).

The tests are written in C++11 and use the [Google Test](https://code.google.com/p/googletest/)
framework, with some additions to fork off particular tests (because a process that enters capability
mode cannot leave it again).

## Provenance

The original basis for these tests was:

- [unit tests](https://github.com/freebsd/freebsd/tree/master/tools/regression/security/cap_test)
   written by Robert Watson and Jonathan Anderson for the original FreeBSD 9.x Capsicum implementation
 - [unit tests](http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel-capsicum.git;a=tree;f=tools/testing/capsicum_tests;hb=refs/heads/capsicum) written by Meredydd Luff for the original Capsicum-Linux port.

These tests were coalesced and moved into an independent repository to enable
comparative testing across multiple OSes, and then substantially extended.

## OS Configuration

### Linux

The following kernel configuration options are needed to run the tests:

- `CONFIG_SECURITY_CAPSICUM`: enable the Capsicum framework
 - `CONFIG_PROCDESC`: enable Capsicum process-descriptor functionality
 - `CONFIG_DEBUG_FS`: enable debug filesystem
 - `CONFIG_IP_SCTP`: enable SCTP support

### FreeBSD (>= 10.x)

The following kernel configuration options are needed so that all tests can run:

- `options P1003_1B_MQUEUE`: Enable POSIX message queues (or `kldload mqueuefs`)

## Other Dependencies

### Linux

The following additional development packages are needed to build the full test suite on Linux.

- `libcaprights`: See below
 - `libcap-dev`: Provides headers for POSIX.1e capabilities.
 - `libsctp1`: Provides SCTP library functions.
 - `libsctp-dev`: Provides headers for SCTP library functions.

## Linux libcaprights

The Capsicum userspace library is held in the `libcaprights/` subdirectory.  Ideally, this
library should be built (with `./configure; make` or `dpkg-buildpackage -uc -us`) and
installed (with `make install` or `dpkg -i libcaprights*.deb`) so that the tests will
use behave like a normal Capsicum-aware application.

However, if no installed copy of the library is found, the `GNUmakefile` will attempt
to use the local `libcaprights/*.c` source; this requires `./configure` to have been
performed in the `libcaprights` subdirectory. The local code is also used for
cross-compiled builds of the test suite (e.g. `make ARCH=32` or `make ARCH=x32`).

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