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Author SHA1 Message Date
3963b5ccf8 Add GitLab 2024-06-27 05:51:13 -03:00
6bd2e7b891 Add parenthesis in examples 2024-06-27 05:36:37 -03:00
8821a0b823 Update example 2024-06-27 05:11:19 -03:00
162aeea421 Update example 2024-06-27 05:09:13 -03:00
71ec204525 v0.2.0 2024-06-27 02:17:16 -03:00
22bc0853e6 gemspec: add MIT 2024-06-27 02:11:57 -03:00
beea35ddf7 Add 0BSD license 2024-06-27 02:10:45 -03:00
f623ad955d fixup! Update docs 2024-06-27 01:35:34 -03:00
e4ef10313a Update docs 2024-06-27 01:32:51 -03:00
c63ce28c21 Update readme_test.rb 2024-06-27 01:07:15 -03:00
11 changed files with 97 additions and 68 deletions

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@ -26,6 +26,8 @@ Layout/MultilineOperationIndentation:
Enabled: False
Layout/MultilineArrayBraceLayout:
Enabled: false
Layout/MultilineArrayBraceLayout:
Enabled: false
Layout/ExtraSpacing:
Exclude:
- lib/bsd/capsicum/constants.rb

32
LICENSE
View file

@ -1,21 +1,15 @@
The MIT License (MIT)
Copyright (C) 2023 by 0x1eef <0x1eef@protonmail.com>
Copyright (c) 2017 Thomas Hurst
Permission to use, copy, modify, and/or distribute this
software for any purpose with or without fee is hereby
granted.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
OF THIS SOFTWARE.

21
LICENSE.ruby-capsicum Normal file
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@ -0,0 +1,21 @@
The MIT License (MIT)
Copyright (c) 2017 Thomas Hurst
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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@ -20,9 +20,9 @@ manual page for more details:
#!/usr/bin/env ruby
require "bsd/capsicum"
print "In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "Enter capability mode: ", BSD::Capsicum.enter! ? "ok" : "error", "\n"
print "In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
print "Enter capability mode: ", (BSD::Capsicum.enter! ? "ok" : "error"), "\n"
print "In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
begin
File.new(File::NULL)
@ -48,15 +48,15 @@ certain tasks but with restrictions in place:
#!/usr/bin/env ruby
require "bsd/capsicum"
print "[parent] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[parent] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
fork do
print "[subprocess] Enter capability mode: ", BSD::Capsicum.enter! ? "ok" : "error", "\n"
print "[subprocess] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[subprocess] Enter capability mode: ", (BSD::Capsicum.enter! ? "ok" : "error"), "\n"
print "[subprocess] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
print "[subprocess] Exit", "\n"
exit 42
end
Process.wait
print "[parent] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[parent] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
##
# [parent] In capability mode: no
@ -71,8 +71,8 @@ __Rights__
The
[BSD::Capsicum.set_rights!](http://0x1eef.github.io/x/bsdcapsicum.rb/BSD/Capsicum.html#set_rights!-instance_method)
method can reduce the capabilities of a file descriptor. The following
example obtains a file descriptor in a parent process (with both read and
write permissions), then limits the capabilities of the file descriptor
example obtains a file descriptor in a parent process (with full capabilities),
then limits the capabilities of the file descriptor
in a child process to allow only read operations. See the
[rights(4)](https://man.freebsd.org/cgi/man.cgi?query=rights&apropos=0&sektion=4&format=html)
man page for a full list of capabilities:
@ -84,13 +84,13 @@ require "bsd/capsicum"
path = File.join(Dir.home, "bsdcapsicum.txt")
file = File.open(path, File::CREAT | File::TRUNC | File::RDWR)
file.sync = true
print "[parent] obtain file descriptor (with read+write permissions)", "\n"
print "[parent] Obtain file descriptor (with all capabilities)", "\n"
fork do
BSD::Capsicum.set_rights!(file, %i[CAP_READ])
print "[subprocess] reduce rights to read-only", "\n"
print "[subprocess] Reduce capabilities to read", "\n"
file.gets
print "[subprocess] read successful", "\n"
print "[subprocess] Read OK", "\n"
begin
file.write "foo"
@ -100,14 +100,14 @@ fork do
end
Process.wait
file.write "[parent] Hello from #{Process.pid}", "\n"
print "[parent] write successful", "\n"
print "[parent] Write OK", "\n"
##
# [parent] obtain file descriptor (with read+write permissions)
# [subprocess] reduce rights to read-only
# [subprocess] read successful
# [parent] Obtain file descriptor (with all capabilities)
# [subprocess] Reduce capabilities to read
# [subprocess] Read OK
# [subprocess] Error: Capabilities insufficient @ io_write - /home/user/bsdcapsicum.txt (Errno::ENOTCAPABLE)
# [parent] write successful
# [parent] Write OK
```
## Documentation
@ -123,6 +123,7 @@ bsdcapsicum.rb is available via rubygems.org:
## Sources
* [GitHub](https://github.com/0x1eef/bsdcapsicum.rb#readme)
* [GitLab](https://gitlab.com/0x1eef/bsdcapsicum.rb#about)
* [git.HardenedBSD.org](https://git.hardenedbsd.org/0x1eef/bsdcapsicum.rb#about)
## See also
@ -133,5 +134,15 @@ bsdcapsicum.rb is available via rubygems.org:
## License
The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
bsdcapsicum.rb
<br>
[BSD Zero Clause](https://choosealicense.com/licenses/0bsd/)
<br>
See [LICENSE](./LICENSE)
<br><br>
ruby-capsicum
<br>
[Freaky/ruby-capsicum](https://github.com/Freaky/ruby-capsicum) is released
under the terms of the MIT license
<br>
See [LICENSE.ruby-capsicum](/.LICENSE-ruby-capsicum)

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@ -11,8 +11,8 @@ Gem::Specification.new do |spec|
spec.summary = "Ruby bindings for FreeBSD's capsicum(4)"
spec.homepage = "https://github.com/0x1eef/bsdcapsicum.rb"
spec.license = "MIT"
spec.files = Dir["lib/*.rb", "lib/**/*.rb", "README.md", "LICENSE", "*.gemspec"]
spec.licenses = ["0BSD", "MIT"]
spec.files = Dir["lib/*.rb", "lib/**/*.rb", "README.md", "LICENSE", "LICENSE.ruby-capsicum", "*.gemspec"]
spec.require_paths = ["lib"]
spec.add_runtime_dependency "fiddle", "~> 1.1"

View file

@ -47,9 +47,10 @@ module BSD::Capsicum
# Restrict the capabilities of a file descriptor
#
# @see https://man.freebsd.org/cgi/man.cgi?query=cap_rights_limit&apropos=0&sektion=2&format=html cap_rights_limit(2)
# @see BSD::Capsicum::Constants See Constants for a full list of capabilities
# @example
# # Allow: READ, WRITE on standard output
# BSD::Capsicum.set_rights!(STDOUT, [:CAP_READ, :CAP_WRITE])
# # Restrict capabilities of STDOUT to read / write
# BSD::Capsicum.set_rights!(STDOUT, %i[CAP_READ CAP_WRITE])
# @raise [SystemCallError]
# Might raise a subclass of SystemCallError
# @param [#to_i] io

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@ -4,5 +4,5 @@ module BSD
end unless defined?(BSD)
module BSD::Capsicum
VERSION = "0.1.0"
VERSION = "0.2.0"
end

View file

@ -1,9 +1,9 @@
require "bundler/setup"
require "bsd/capsicum"
print "In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "Enter capability mode: ", BSD::Capsicum.enter! ? "ok" : "error", "\n"
print "In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
print "Enter capability mode: ", (BSD::Capsicum.enter! ? "ok" : "error"), "\n"
print "In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
begin
File.new(File::NULL)

View file

@ -1,15 +1,15 @@
require "bundler/setup"
require "bsd/capsicum"
print "[parent] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[parent] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
fork do
print "[subprocess] Enter capability mode: ", BSD::Capsicum.enter! ? "ok" : "error", "\n"
print "[subprocess] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[subprocess] Enter capability mode: ", (BSD::Capsicum.enter! ? "ok" : "error"), "\n"
print "[subprocess] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
print "[subprocess] Exit", "\n"
exit 42
end
Process.wait
print "[parent] In capability mode: ", BSD::Capsicum.in_capability_mode? ? "yes" : "no", "\n"
print "[parent] In capability mode: ", (BSD::Capsicum.in_capability_mode? ? "yes" : "no"), "\n"
##
# [parent] In capability mode: no

View file

@ -4,13 +4,13 @@ require "bsd/capsicum"
path = File.join(Dir.home, "bsdcapsicum.txt")
file = File.open(path, File::CREAT | File::TRUNC | File::RDWR)
file.sync = true
print "[parent] obtain file descriptor (with read+write permissions)", "\n"
print "[parent] Obtain file descriptor (with all capabilities)", "\n"
fork do
BSD::Capsicum.set_rights!(file, %i[CAP_READ])
print "[subprocess] reduce rights to read-only", "\n"
print "[subprocess] Reduce capabilities to read", "\n"
file.gets
print "[subprocess] read successful", "\n"
print "[subprocess] Read OK", "\n"
begin
file.write "foo"
@ -20,11 +20,11 @@ fork do
end
Process.wait
file.write "[parent] Hello from #{Process.pid}", "\n"
print "[parent] write successful", "\n"
print "[parent] Write OK", "\n"
##
# [parent] obtain file descriptor (with read+write permissions)
# [subprocess] reduce rights to read-only
# [subprocess] read successful
# [subprocess] Error: Capabilities insufficient @ io_write - /home/0x1eef/bsdcapsicum.txt (Errno::ENOTCAPABLE)
# [parent] write successful
# [parent] Obtain file descriptor (with all capabilities)
# [subprocess] Reduce capabilities to read
# [subprocess] Read OK
# [subprocess] Error: Capabilities insufficient @ io_write - /home/user/bsdcapsicum.txt (Errno::ENOTCAPABLE)
# [parent] Write OK

View file

@ -6,10 +6,10 @@ require "test-cmd"
class ReadMeTest < Minitest::Test
def test_1_capability_mode_example
r = ruby(readme_example("1_capability_mode_example.rb"))
assert_match %r{In capability mode: no\n}, r.stdout
assert_match %r{Enter capability mode: ok\n}, r.stdout
assert_match %r{In capability mode: yes\n}, r.stdout
assert_match %r{Error:.+\(Errno::ECAPMODE\)\n}, r.stdout
assert_match %r|In capability mode: no\n|, r.stdout
assert_match %r|Enter capability mode: ok\n|, r.stdout
assert_match %r|In capability mode: yes\n|, r.stdout
assert_match %r|Error:.+\(Errno::ECAPMODE\)\n|, r.stdout
end
def test_2_fork_example
@ -24,11 +24,11 @@ class ReadMeTest < Minitest::Test
def test_3_set_rights_example
r = ruby(readme_example("3_set_rights_example.rb"))
["[parent] obtain file descriptor (with read+write permissions)\n",
"[subprocess] reduce rights to read-only\n",
"[subprocess] read successful\n",
%r{\[subprocess\] Error:.+\(Errno::ENOTCAPABLE\)\n},
"[parent] write successful\n"
["[parent] Obtain file descriptor (with all capabilities)\n",
"[subprocess] Reduce capabilities to read\n",
"[subprocess] Read OK\n",
%r|\[subprocess\] Error:.+\(Errno::ENOTCAPABLE\)\n|,
"[parent] Write OK\n"
].each { assert_match((Regexp === _1) ? _1 : /#{Regexp.escape(_1)}/, r.stdout) }
ensure
FileUtils.rm File.join(Dir.home, "bsdcapsicum.txt")