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#
# Author:: Thom May (<thom@chef.io>)
# Copyright:: Copyright (c) 2016-2017, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# 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 "chef/resource"
require "chef/dsl/declare_resource"
require "chef/mixin/shell_out"
require "chef/http/simple"
require "chef/provider/noop"
class Chef
class Provider
class AptRepository < Chef::Provider
include Chef::Mixin::ShellOut
provides :apt_repository, platform_family: "debian"
LIST_APT_KEY_FINGERPRINTS = "apt-key adv --list-public-keys --with-fingerprint --with-colons".freeze
def load_current_resource
end
action :add do
if new_resource.key.nil?
logger.debug "No 'key' property specified skipping key import"
else
new_resource.key.each do |k|
if is_key_id?(k) && !has_cookbook_file?(k)
install_key_from_keyserver(k)
else
install_key_from_uri(k)
end
end
end
declare_resource(:execute, "apt-cache gencaches") do
ignore_failure true
action :nothing
end
declare_resource(:apt_update, new_resource.name) do
ignore_failure true
action :nothing
end
cleanup_legacy_file!
repo = build_repo(
new_resource.uri,
new_resource.distribution,
repo_components,
new_resource.trusted,
new_resource.arch,
new_resource.deb_src
)
declare_resource(:file, "/etc/apt/sources.list.d/#{new_resource.repo_name}.list") do
owner "root"
group "root"
mode "0644"
content repo
sensitive new_resource.sensitive
action :create
notifies :run, "execute[apt-cache gencaches]", :immediately
notifies :update, "apt_update[#{new_resource.name}]", :immediately if new_resource.cache_rebuild
end
end
action :remove do
cleanup_legacy_file!
if ::File.exist?("/etc/apt/sources.list.d/#{new_resource.repo_name}.list")
converge_by "Removing #{new_resource.repo_name} repository from /etc/apt/sources.list.d/" do
declare_resource(:file, "/etc/apt/sources.list.d/#{new_resource.repo_name}.list") do
sensitive new_resource.sensitive
action :delete
notifies :update, "apt_update[#{new_resource.name}]", :immediately if new_resource.cache_rebuild
end
declare_resource(:apt_update, new_resource.name) do
ignore_failure true
action :nothing
end
end
else
logger.trace("/etc/apt/sources.list.d/#{new_resource.repo_name}.list does not exist. Nothing to do")
end
end
# is the provided ID a key ID from a keyserver. Looks at length and HEX only values
# @param [String] id the key value passed by the user that *may* be an ID
def is_key_id?(id)
id = id[2..-1] if id.start_with?("0x")
id =~ /^\h+$/ && [8, 16, 40].include?(id.length)
end
# run the specified command and extract the fingerprints from the output
# accepts a command so it can be used to extract both the current key's fingerprints
# and the fingerprint of the new key
# @param [String] cmd the command to run
#
# @return [Array] an array of fingerprints
def extract_fingerprints_from_cmd(cmd)
so = shell_out(cmd)
so.stdout.split(/\n/).map do |t|
if z = t.match(/^fpr:+([0-9A-F]+):/)
z[1].split.join
end
end.compact
end
# validate the key against the apt keystore to see if that version is expired
# @param [String] key
#
# @return [Boolean] is the key valid or not
def key_is_valid?(key)
valid = true
so = shell_out("apt-key list")
so.stdout.split(/\n/).map do |t|
if t =~ %r{^\/#{key}.*\[expired: .*\]$}
logger.debug "Found expired key: #{t}"
valid = false
break
end
end
logger.debug "key #{key} #{valid ? "is valid" : "is not valid"}"
valid
end
# return the specified cookbook name or the cookbook containing the
# resource.
#
# @return [String] name of the cookbook
def cookbook_name
new_resource.cookbook || new_resource.cookbook_name
end
# determine if a cookbook file is available in the run
# @param [String] fn the path to the cookbook file
#
# @return [Boolean] cookbook file exists or doesn't
def has_cookbook_file?(fn)
run_context.has_cookbook_file_in_cookbook?(cookbook_name, fn)
end
# determine if there are any new keys by comparing the fingerprints of installed
# keys to those of the passed file
# @param [String] file the keyfile of the new repository
#
# @return [Boolean] true: no new keys in the file. false: there are new keys
def no_new_keys?(file)
# Now we are using the option --with-colons that works across old os versions
# as well as the latest (16.10). This for both `apt-key` and `gpg` commands
installed_keys = extract_fingerprints_from_cmd(LIST_APT_KEY_FINGERPRINTS)
proposed_keys = extract_fingerprints_from_cmd("gpg --with-fingerprint --with-colons #{file}")
(installed_keys & proposed_keys).sort == proposed_keys.sort
end
# Given the provided key URI determine what kind of chef resource we need
# to fetch the key
# @param [String] uri the uri of the gpg key (local path or http URL)
#
# @raise [Chef::Exceptions::FileNotFound] Key isn't remote or found in the current run
#
# @return [Symbol] :remote_file or :cookbook_file
def key_type(uri)
if uri.start_with?("http")
:remote_file
elsif has_cookbook_file?(uri)
:cookbook_file
else
raise Chef::Exceptions::FileNotFound, "Cannot locate key file: #{uri}"
end
end
# Fetch the key using either cookbook_file or remote_file, validate it,
# and install it with apt-key add
# @param [String] key the key to install
#
# @raise [RuntimeError] Invalid key which can't verify the apt repository
#
# @return [void]
def install_key_from_uri(key)
key_name = key.gsub(/[^0-9A-Za-z\-]/, "_")
cached_keyfile = ::File.join(Chef::Config[:file_cache_path], key_name)
declare_resource(key_type(key), cached_keyfile) do
source key
mode "0644"
sensitive new_resource.sensitive
action :create
verify "gpg %{path}"
end
declare_resource(:execute, "apt-key add #{cached_keyfile}") do
sensitive new_resource.sensitive
action :run
not_if { no_new_keys?(cached_keyfile) }
notifies :run, "execute[apt-cache gencaches]", :immediately
end
end
# build the apt-key command to install the keyserver
# @param [String] key the key to install
# @param [String] keyserver the key server to use
#
# @return [String] the full apt-key command to run
def keyserver_install_cmd(key, keyserver)
cmd = "apt-key adv --recv"
cmd << " --keyserver-options http-proxy=#{new_resource.key_proxy}" if new_resource.key_proxy
cmd << " --keyserver "
cmd << if keyserver.start_with?("hkp://")
keyserver
else
"hkp://#{keyserver}:80"
end
cmd << " #{key}"
cmd
end
# @param [String] key
# @param [String] keyserver
#
# @raise [RuntimeError] Invalid key which can't verify the apt repository
#
# @return [void]
def install_key_from_keyserver(key, keyserver = new_resource.keyserver)
declare_resource(:execute, "install-key #{key}") do
command keyserver_install_cmd(key, keyserver)
sensitive new_resource.sensitive
not_if do
present = extract_fingerprints_from_cmd(LIST_APT_KEY_FINGERPRINTS).any? do |fp|
fp.end_with? key.upcase
end
present && key_is_valid?(key.upcase)
end
notifies :run, "execute[apt-cache gencaches]", :immediately
end
raise "The key #{key} is invalid and cannot be used to verify an apt repository." unless key_is_valid?(key.upcase)
end
# @param [String] owner
# @param [String] repo
#
# @raise [RuntimeError] Could not access the Launchpad PPA API
#
# @return [void]
def install_ppa_key(owner, repo)
url = "https://launchpad.net/api/1.0/~#{owner}/+archive/#{repo}"
key_id = Chef::HTTP::Simple.new(url).get("signing_key_fingerprint").delete('"')
install_key_from_keyserver(key_id, "keyserver.ubuntu.com")
rescue Net::HTTPServerException => e
raise "Could not access Launchpad ppa API: #{e.message}"
end
# determine if the repository URL is a PPA
# @param [String] url the url of the repository
#
# @return [Boolean] is the repo URL a PPA
def is_ppa_url?(url)
url.start_with?("ppa:")
end
# determine the repository's components:
# - "components" property if defined
# - "main" if "components" not defined and the repo is a PPA URL
# - otherwise nothing
#
# @return [String] the repository component
def repo_components
if is_ppa_url?(new_resource.uri) && new_resource.components.empty?
"main"
else
new_resource.components
end
end
# given a PPA return a PPA URL in http://ppa.launchpad.net format
# @param [String] ppa the ppa URL
#
# @return [String] full PPA URL
def make_ppa_url(ppa)
owner, repo = ppa[4..-1].split("/")
repo ||= "ppa"
install_ppa_key(owner, repo)
"http://ppa.launchpad.net/#{owner}/#{repo}/ubuntu"
end
# build complete repo text that will be written to the config
# @param [String] uri
# @param [Array] components
# @param [Boolean] trusted
# @param [String] arch
# @param [Boolean] add_src
#
# @return [String] complete repo config text
def build_repo(uri, distribution, components, trusted, arch, add_src = false)
uri = make_ppa_url(uri) if is_ppa_url?(uri)
uri = '"' + uri + '"' unless uri.start_with?("'", '"')
components = Array(components).join(" ")
options = []
options << "arch=#{arch}" if arch
options << "trusted=yes" if trusted
optstr = unless options.empty?
"[" + options.join(" ") + "]"
end
info = [ optstr, uri, distribution, components ].compact.join(" ")
repo = "deb #{info}\n"
repo << "deb-src #{info}\n" if add_src
repo
end
# clean up a potentially legacy file from before we fixed the usage of
# new_resource.name vs. new_resource.repo_name. We might have the
# name.list file hanging around and need to clean it up.
#
# @return [void]
def cleanup_legacy_file!
legacy_path = "/etc/apt/sources.list.d/#{new_resource.name}.list"
if new_resource.name != new_resource.repo_name && ::File.exist?(legacy_path)
converge_by "Cleaning up legacy #{legacy_path} repo file" do
declare_resource(:file, legacy_path) do
action :delete
# Not triggering an update since it isn't super likely to be needed.
end
end
end
end
end
end
end
Chef::Provider::Noop.provides :apt_repository
|