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README.md

1# Capsicum User Space Tests
2
3This directory holds unit tests for [Capsicum](http://www.cl.cam.ac.uk/research/security/capsicum/)
4object-capabilities. The tests exercise the syscall interface to a Capsicum-enabled operating system,
5currently either [FreeBSD >=10.x](http://www.freebsd.org) or a modified Linux kernel (the
6[capsicum-linux](http://github.com/google/capsicum-linux) project).
7
8The tests are written in C++98, and use the [Google Test](https://code.google.com/p/googletest/)
9framework, with some additions to fork off particular tests (because a process that enters capability
10mode cannot leave it again).
11
12## Provenance
13
14The original basis for these tests was:
15
16 - [unit tests](https://github.com/freebsd/freebsd/tree/master/tools/regression/security/cap_test)
17   written by Robert Watson and Jonathan Anderson for the original FreeBSD 9.x Capsicum implementation
18 - [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.
19
20These tests were coalesced and moved into an independent repository to enable
21comparative testing across multiple OSes, and then substantially extended.
22
23## OS Configuration
24
25### Linux
26
27The following kernel configuration options are needed to run the tests:
28
29 - `CONFIG_SECURITY_CAPSICUM`: enable the Capsicum framework
30 - `CONFIG_PROCDESC`: enable Capsicum process-descriptor functionality
31 - `CONFIG_DEBUG_FS`: enable debug filesystem
32 - `CONFIG_IP_SCTP`: enable SCTP support
33
34### FreeBSD (>= 10.x)
35
36The following kernel configuration options are needed so that all tests can run:
37
38  - `options P1003_1B_MQUEUE`: Enable POSIX message queues (or `kldload mqueuefs`)
39
40## Other Dependencies
41
42### Linux
43
44The following additional development packages are needed to build the full test suite on Linux.
45
46 - `libcaprights`: See below
47 - `libcap-dev`: Provides headers for POSIX.1e capabilities.
48 - `libsctp1`: Provides SCTP library functions.
49 - `libsctp-dev`: Provides headers for SCTP library functions.
50
51
52## Linux libcaprights
53
54The Capsicum userspace library is held in the `libcaprights/` subdirectory.  Ideally, this
55library should be built (with `./configure; make` or `dpkg-buildpackage -uc -us`) and
56installed (with `make install` or `dpkg -i libcaprights*.deb`) so that the tests will
57use behave like a normal Capsicum-aware application.
58
59However, if no installed copy of the library is found, the `GNUmakefile` will attempt
60to use the local `libcaprights/*.c` source; this requires `./configure` to have been
61performed in the `libcaprights` subdirectory. The local code is also used for
62cross-compiled builds of the test suite (e.g. `make ARCH=32` or `make ARCH=x32`).
63