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|
#
# perhaps we want to verify that the key files are actually the key files we expect.
# we could use 'file' for this:
#
# > file ~/.gnupg/00440025.asc
# ~/.gnupg/00440025.asc: PGP public key block
#
# > file ~/.ssh/id_rsa.pub
# ~/.ssh/id_rsa.pub: OpenSSH RSA public key
#
module LeapCli
module Commands
desc 'Manage trusted sysadmins (DEPRECATED)'
long_desc "Use `leap user add` instead"
command :'add-user' do |c|
c.switch 'self', :desc => 'Add yourself as a trusted sysadmin by choosing among the public keys available for the current user.', :negatable => false
c.flag 'ssh-pub-key', :desc => 'SSH public key file for this new user'
c.flag 'pgp-pub-key', :desc => 'OpenPGP public key file for this new user'
c.action do |global_options,options,args|
do_add_user(global_options, options, args)
end
end
desc 'Manage trusted sysadmins'
long_desc "Manage the trusted sysadmins that are configured in the 'users' directory."
command :user do |user|
user.desc 'Adds a new trusted sysadmin'
user.arg_name 'USERNAME'
user.command :add do |c|
c.switch 'self', :desc => 'Add yourself as a trusted sysadmin by choosing among the public keys available for the current user.', :negatable => false
c.flag 'ssh-pub-key', :desc => 'SSH public key file for this new user'
c.flag 'pgp-pub-key', :desc => 'OpenPGP public key file for this new user'
c.action do |global_options,options,args|
do_add_user(global_options, options, args)
end
end
user.desc 'Removes a trusted sysadmin'
user.arg_name 'USERNAME'
user.command :rm do |c|
c.action do |global_options,options,args|
do_rm_user(global_options, options, args)
end
end
user.desc 'Lists the configured sysadmins'
user.command :ls do |c|
c.action do |global_options,options,args|
do_list_users(global_options, options, args)
end
end
end
private
def do_add_user(global, options, args)
require 'leap_cli/ssh'
username = args.first
if !username.any?
if options[:self]
username ||= `whoami`.strip
else
help! "Either USERNAME argument or --self flag is required."
end
end
if Leap::Platform.reserved_usernames.include? username
bail! %(The username "#{username}" is reserved. Sorry, pick another.)
end
ssh_pub_key = nil
pgp_pub_key = nil
if options['ssh-pub-key']
ssh_pub_key = read_file!(options['ssh-pub-key'])
end
if options['pgp-pub-key']
pgp_pub_key = read_file!(options['pgp-pub-key'])
end
if options[:self]
ssh_pub_key ||= pick_ssh_key.to_s
pgp_pub_key ||= pick_pgp_key
end
assert!(ssh_pub_key, 'Sorry, could not find SSH public key.')
if ssh_pub_key
write_file!([:user_ssh, username], ssh_pub_key)
end
if pgp_pub_key
write_file!([:user_pgp, username], pgp_pub_key)
end
update_authorized_keys
end
def do_rm_user(global, options, args)
dir = [:user_dir, args.first]
if Util.dir_exists?(dir)
Util.remove_file!(dir)
update_authorized_keys
else
bail! :error, 'There is no directory `%s`' % Path.named_path(dir)
end
end
def do_list_users(global, options, args)
require 'leap_cli/ssh'
ssh_keys = {}
Dir.glob("#{ENV['HOME']}/.ssh/*.pub").each do |keyfile|
key = SSH::Key.load(keyfile)
ssh_keys[key.fingerprint] = key if key
end
ssh_agent_keys = {}
if !`which ssh-add`.empty?
`ssh-add -L`.split("\n").each do |keystring|
key = SSH::Key.load(keystring)
ssh_agent_keys[key.fingerprint] = key if key
end
end
Dir.glob(path([:user_ssh, '*'])).each do |keyfile|
username = File.basename(File.dirname(keyfile))
log username, :color => :cyan do
log Path.relative_path(keyfile)
key = SSH::Key.load(keyfile)
if key.nil?
log :warning, "could not read ssh key #{keyfile}" do
log "currently, only these ssh key types are supported: " + SSH::Key::SUPPORTED_TYPES.join(", ")
end
else
log 'SSH MD5 fingerprint: ' + key.fingerprint(:digest => :md5, :type => :ssh, :encoding => :hex)
log 'SSH SHA256 fingerprint: ' + key.fingerprint(:digest => :sha256, :type => :ssh, :encoding => :base64)
log 'DER MD5 fingerprint: ' + key.fingerprint(:digest => :md5, :type => :der, :encoding => :hex)
if ssh_keys[key.fingerprint]
log 'Matches local key: ' + ssh_keys[key.fingerprint].filename, color: :green
if ssh_agent_keys[key.fingerprint]
log 'Matches ssh-agent key: ' + ssh_agent_keys[key.fingerprint].summary(encoding: :base64), color: :green
else
log :error, 'No matching key in the ssh-agent'
end
end
end
end
end
end
#
# let the the user choose among the ssh public keys that we encounter, or
# just pick the key if there is only one.
#
def pick_ssh_key
ssh_keys = []
Dir.glob("#{ENV['HOME']}/.ssh/*.pub").each do |keyfile|
ssh_keys << SSH::Key.load(keyfile)
end
if `which ssh-add`.strip.any?
`ssh-add -L 2> /dev/null`.split("\n").compact.each do |line|
key = SSH::Key.load(line)
if key
key.comment = 'ssh-agent'
ssh_keys << key unless ssh_keys.include?(key)
end
end
end
ssh_keys.compact!
assert! ssh_keys.any?, 'Sorry, could not find any SSH public key for you. Have you run ssh-keygen?'
if ssh_keys.length > 1
key_index = numbered_choice_menu('Choose your SSH public key', ssh_keys.collect(&:summary)) do |line, i|
say("#{i+1}. #{line}")
end
else
key_index = 0
log "Picking the only compatible ssh key: "+ ssh_keys[key_index].filename do
log ssh_keys[key_index].summary
end
end
return ssh_keys[key_index]
end
#
# let the the user choose among the gpg public keys that we encounter, or just pick the key if there is only one.
#
def pick_pgp_key
begin
require 'gpgme'
rescue LoadError
log "Skipping OpenPGP setup because gpgme is not installed."
return
end
secret_keys = GPGME::Key.find(:secret)
if secret_keys.empty?
log "Skipping OpenPGP setup because I could not find any OpenPGP keys for you"
return nil
end
secret_keys.select!{|key| !key.expired}
if secret_keys.length > 1
key_index = numbered_choice_menu('Choose your OpenPGP public key', secret_keys) do |key, i|
key_info = key.to_s.split("\n")[0..1].map{|line| line.sub(/^\s*(sec|uid)\s*/,'')}.join(' -- ')
say("#{i+1}. #{key_info}")
end
else
key_index = 0
end
key_id = secret_keys[key_index].sha
# can't use this, it includes signatures:
#puts GPGME::Key.export(key_id, :armor => true, :export_options => :export_minimal)
# export with signatures removed:
return `gpg --armor --export-options export-minimal --export #{key_id}`.strip
end
end
end
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