1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
#!/usr/bin/env ruby
require 'English'
require 'fileutils'
require 'net/scp'
require 'net/ssh'
require 'yaml'
require 'optparse'
class KeyTool
def initialize(myself)
raise 'Wireguard tool not found' unless system('which wg > /dev/null 2>&1')
@myself = myself
@psk_dir = 'keys/psk'
mykeys_dir = "keys/#{myself}"
[mykeys_dir, @psk_dir].each do |dir|
FileUtils.mkdir_p(dir) unless Dir.exist?(dir)
end
@pubkey_path = "#{mykeys_dir}/pub.key"
@privkey_path = "#{mykeys_dir}/priv.key"
gen_privpub! if !File.exist?(@pubkey_path) || !File.exist?(@privkey_path)
end
def pub = File.read(@pubkey_path).strip
def priv = File.read(@privkey_path).strip
# Preshared key
def psk(peer)
psk_path = "#{@psk_dir}/#{[@myself, peer].sort.join('_')}.key"
gen_psk!(psk_path) unless File.exist?(psk_path)
File.read(psk_path).strip
end
private
def gen_psk!(psk_path) = File.write(psk_path, `wg genpsk`)
def gen_privpub!
privkey = IO.popen('wg genkey', 'r+', &:read)
IO.popen('wg pubkey', 'r+') do |io|
io.puts(privkey)
io.close_write
File.write(@privkey_path, privkey)
File.write(@pubkey_path, io.read)
end
end
end
PeerSnippet = Struct.new(:myself, :peer, :domain, :wgdomain,
:allowed_ips, :endpoint) do
def to_s
keytool = KeyTool.new(myself)
<<~PEER_CONF
[Peer]
# #{myself}.#{domain} as #{myself}.#{wgdomain}
PublicKey = #{keytool.pub}
PresharedKey = #{keytool.psk(peer)}
AllowedIPs = #{allowed_ips}/32
#{endpoint_str}
PEER_CONF
end
def endpoint_str
return '# Due to NAT no Endpoint configured' if endpoint == :behind_nat
"Endpoint = #{endpoint}:56709"
end
end
WireguardConfig = Struct.new(:myself, :hosts) do
def to_s
keytool = KeyTool.new(myself)
<<~CONF
[Interface]
# #{myself}.#{hosts[myself]['wg0']['domain']}
#{address}
PrivateKey = #{keytool.priv}
ListenPort = 56709
#{peers(&:to_s).join("\n")}
CONF
end
def clean!
%w[dist keys].select { |dir| Dir.exist?(dir) }.each do |dir|
FileUtils.rm_r(dir)
end
end
def generate!
dist_dir = "dist/#{myself}/etc/wireguard"
puts "Generating #{dist_dir}/wg0.conf"
FileUtils.mkdir_p(dist_dir) unless Dir.exist?(dist_dir)
File.write("#{dist_dir}/wg0.conf", to_s)
end
private
def address
return '# No Address = ... for OpenBSD here' if hosts[myself]['os'] == 'OpenBSD'
"Address = #{hosts[myself]['wg0']['ip']}"
end
def peers
excluded = hosts[myself].fetch('exclude_peers', []) << myself
i_am_in_lan = hosts[myself].key?('lan')
hosts.reject { excluded.include?(_1) }.map do |peer, data|
peer_is_in_lan = data.key?('lan')
reach = data[peer_is_in_lan ? 'lan' : 'internet']
endpoint = if peer_is_in_lan == i_am_in_lan ||
!peer_is_in_lan
reach['ip']
else
:behind_nat
end
PeerSnippet.new(peer, myself, reach['domain'], data['wg0']['domain'],
data['wg0']['ip'], endpoint)
end
end
end
InstallConfig = Struct.new(:myself, :hosts) do
def initialize(myself, hosts)
@myself = myself
data = hosts[myself]
domain = data.dig('lan', 'domain') || data.dig('internet', 'domain')
@fqdn = "#{myself}.#{domain}"
@ssh_user = data['ssh']['user']
@sudo_cmd = data['ssh']['sudo_cmd']
@reload_cmd = data['ssh']['reload_cmd']
@conf_dir = data['ssh']['conf_dir']
end
def upload!
wg0_conf = "dist/#{@myself}/etc/wireguard/wg0.conf"
scp(wg0_conf)
self
end
def install!
puts "Installing Wireguard config on #{@myself}"
ssh <<~SH
if [ ! -d #{@conf_dir} ]; then
#{@sudo_cmd} mkdir -p #{@conf_dir}
fi
#{@sudo_cmd} chmod 700 #{@conf_dir}
#{@sudo_cmd} mv -v wg0.conf #{@conf_dir}
#{@sudo_cmd} chmod 644 #{@conf_dir}/wg0.conf
SH
end
def restart!
puts "Reloading Wireguard on #{@myself}"
ssh <<~SH
#{@sudo_cmd} #{@reload_cmd}
#{@sudo_cmd} wg show
SH
end
private
def scp(src, dst = '.')
puts "Uploading #{src} to #{@fqdn}:#{dst}"
raise "Upload #{srd} to #{@fqdn}:#{dst} failed" unless
Net::SCP.upload!(@fqdn, @ssh_user, src, dst)
end
def ssh(cmd)
File.write('cmd.sh', <<~SH) and scp('cmd.sh')
#!/bin/sh
set -x
#{cmd}
rm $0
SH
File.delete('cmd.sh') if File.exist?('cmd.sh')
Net::SSH.start(@fqdn, @ssh_user) do |ssh|
output = ssh.exec!('sh cmd.sh')
raise output unless output.exitstatus.zero?
puts output
end
self
end
end
begin
options = { hosts: [] }
OptionParser.new do |opts|
opts.on('--generate', 'Generate Wireguard configs') do
options[:generate] = true
end
opts.on('--install', 'Install Wireguard configs') do
options[:install] = true
end
opts.on('--clean', 'Clean Wireguard configs') do
options[:clean] = true
end
opts.on('--hosts=HOSTS', 'Comma separated hosts to configure') do |hosts|
options[:hosts] = hosts.split(',')
end
end.parse!
conf = YAML.load_file('wireguardmeshgenerator.yaml').freeze
conf['hosts'].keys.select { options[:hosts].empty? || options[:hosts].include?(_1) }
.each do |host|
WireguardConfig.new(host, conf['hosts']).generate! if options[:generate]
InstallConfig.new(host, conf['hosts']).upload!.install!.restart! if options[:install]
WireguardConfig.new(host, conf['hosts']).clean! if options[:clean]
end
rescue StandardError => e
puts "Error: #{e.message}"
puts e.backtrace.join("\n")
exit 2
end
|
