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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require_relative "../resource"
require_relative "selinux/common_helpers"
class Chef
class Resource
class SelinuxLogin < Chef::Resource
unified_mode true
provides :selinux_login
description "Use the **selinux_login** resource to add, update, or remove SELinux user to OS login mappings."
introduced "18.1"
examples <<~DOC
**Manage test OS user mapping with a range of s0 and associated SELinux user test_u**:
```ruby
selinux_login 'test' do
user 'test_u'
range 's0'
end
```
DOC
property :login, String,
name_property: true,
description: "An optional property to set the OS user login value if it differs from the resource block's name."
property :user, String,
description: "SELinux user to be mapped."
property :range, String,
description: "MLS/MCS security range for the SELinux user."
load_current_value do |new_resource|
logins = shell_out!("semanage login -l").stdout.split("\n")
current_login = logins.grep(/^#{Regexp.escape(new_resource.login)}\s+/) do |l|
l.match(/^(?<login>[^\s]+)\s+(?<user>[^\s]+)\s+(?<range>[^\s]+)/)
# match returns [<Match 'data'>] or [], shift converts that to <Match 'data'> or nil
end.shift
current_value_does_not_exist! unless current_login
# Existing resources should maintain their current configuration unless otherwise specified
new_resource.user ||= current_login[:user]
new_resource.range ||= current_login[:range]
user current_login[:user]
range current_login[:range]
end
action_class do
include Chef::SELinux::CommonHelpers
def semanage_login_args
# Generate arguments for semanage login -a or -m
args = ""
args += " -s #{new_resource.user}" if new_resource.user
args += " -r #{new_resource.range}" if new_resource.range
args
end
end
action :manage, description: "Sets the SELinux login mapping to the desired settings regardless of previous state." do
run_action(:add)
run_action(:modify)
end
# Create if doesn't exist, do not touch if user already exists
action :add, description: "Creates the SELinux login mapping if not previously created." do
raise "The user property must be populated to create a new SELinux login" if new_resource.user.to_s.empty?
if selinux_disabled?
Chef::Log.warn("Unable to add SELinux login #{new_resource.login} as SELinux is disabled")
return
end
unless current_resource
converge_if_changed do
shell_out!("semanage login -a#{semanage_login_args} #{new_resource.login}")
end
end
end
# Only modify port if it exists & doesn't have the correct context already
action :modify, description: "Updates the SELinux login mapping if previously created." do
if selinux_disabled?
Chef::Log.warn("Unable to modify SELinux login #{new_resource.login} as SELinux is disabled")
return
end
if current_resource
converge_if_changed do
shell_out!("semanage login -m#{semanage_login_args} #{new_resource.login}")
end
end
end
# Delete if exists
action :delete, description: "Removes the SELinux login mapping if previously created." do
if selinux_disabled?
Chef::Log.warn("Unable to delete SELinux login #{new_resource.login} as SELinux is disabled")
return
end
if current_resource
converge_by "deleting SELinux login #{new_resource.login}" do
shell_out!("semanage login -d #{new_resource.login}")
end
end
end
end
end
end
|
