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require 'tempfile'
require 'timeout'
require_relative 'gitlab_config'
require_relative 'gitlab_logger'
class GitlabKeys
attr_accessor :auth_file, :key
def initialize
@command = ARGV.shift
@key_id = ARGV.shift
@key = ARGV.shift
@auth_file = GitlabConfig.new.auth_file
end
def exec
case @command
when 'add-key'; add_key
when 'batch-add-keys'; batch_add_keys
when 'rm-key'; rm_key
when 'list-keys'; puts list_keys
when 'clear'; clear
else
$logger.warn "Attempt to execute invalid gitlab-keys command #{@command.inspect}."
puts 'not allowed'
false
end
end
protected
def add_key
lock do
$logger.info "Adding key #{@key_id} => #{@key.inspect}"
auth_line = key_line(@key_id, @key)
open(auth_file, 'a') { |file| file.puts(auth_line) }
end
true
end
def list_keys
$logger.info 'Listing all keys'
keys = ''
File.readlines(auth_file).each do |line|
# key_id & public_key
# command=".../bin/gitlab-shell key-741" ... ssh-rsa AAAAB3NzaDAxx2E\n
# ^^^^^^^ ^^^^^^^^^^^^^^^
matches = /^command=\".+?\s+(.+?)\".+?(?:ssh|ecdsa)-.*?\s(.+)\s*.*\n*$/.match(line)
keys << "#{matches[1]} #{matches[2]}\n" unless matches.nil?
end
keys
end
def batch_add_keys
lock do
open(auth_file, 'a') do |file|
stdin.each_line do |input|
tokens = input.strip.split("\t")
abort("#{$0}: invalid input #{input.inspect}") unless tokens.count == 2
key_id, public_key = tokens
$logger.info "Adding key #{key_id} => #{public_key.inspect}"
file.puts(key_line(key_id, public_key))
end
end
end
true
end
def stdin
$stdin
end
def key_line(key_id, public_key)
auth_line = "command=\"#{ROOT_PATH}/bin/gitlab-shell #{key_id}\",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty #{public_key}"
end
def rm_key
lock do
$logger.info "Removing key #{@key_id}"
Tempfile.open('authorized_keys') do |temp|
open(auth_file, 'r+') do |current|
current.each do |line|
temp.puts(line) unless line.include?("/bin/gitlab-shell #{@key_id}\"")
end
end
temp.close
FileUtils.cp(temp.path, auth_file)
end
end
true
end
def clear
open(auth_file, 'w') { |file| file.puts '# Managed by gitlab-shell' }
true
end
def lock(timeout = 10)
File.open(lock_file, "w+") do |f|
begin
f.flock File::LOCK_EX
Timeout::timeout(timeout) { yield }
ensure
f.flock File::LOCK_UN
end
end
end
def lock_file
@lock_file ||= auth_file + '.lock'
end
end
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