3 # frozen_string_literal: true
13 def read_config(path = 'config.yaml')
14 p "Reading config from #{path}"
16 rescue Psych::SyntaxError => e
17 warn "Parsing configfile failed: #{e}"
19 rescue Errno::ENOENT => e
20 warn "IO failed: #{e}"
24 def ensure_cert_dir(path = './certs')
25 unless File.exist?(path)
26 puts 'Certificate directory does not exist. Creating with secure permissions.'
27 Dir.mkdir(path, 0o0700)
29 File.world_writable?(path) && warn('WARNING! Certificate directory is world writable! This could be a serious security issue!')
30 File.world_readable?(path) && warn('WARNING! Certificate directory is world readable! This could be a serious security issue!')
31 File.file?(path) && raise('Certificate directory is not a directory but a file. Aborting.')
32 File.writable?(path) || raise('Certificate directory is not writable. Aborting.')
35 def read_account_key(path = 'pkey.pem')
36 p "Reading account key from #{path}"
37 if File.readable?(path)
38 p "File #{path} is readable, trying to parse"
39 privatekey_string = File.read(path)
40 private_key = OpenSSL::PKey::EC.new(privatekey_string)
41 elsif File.exist?(path)
42 raise("The file #{path} exists but is not readable. Make it readable or specify different path")
44 p "File #{path} does not exist, trying to create"
45 private_key = OpenSSL::PKey::EC.generate('prime256v1')
46 File.write(path, private_key.private_to_pem)
51 def read_cert_key(cert_name)
52 folder = "./certs/#{cert_name}/"
53 path = "#{folder}/current.key"
54 p "cert_name #{cert_name}: Reading cert key from #{path}"
55 if File.readable?(path)
56 p "cert_name #{cert_name}: File #{path} is readable, trying to parse"
57 privatekey_string = File.read(path)
58 private_key = OpenSSL::PKey::EC.new(privatekey_string)
59 elsif File.exist?(path)
60 raise("cert_name #{cert_name}: The file #{path} exists but is not readable. Make it readable or specify different path")
62 p "cert_name #{cert_name}: File #{path} does not exist, trying to create"
63 private_key = OpenSSL::PKey::EC.generate('prime256v1')
64 pkey_file = File.new("#{folder}#{Time.now.to_i}.key", 'w')
65 pkey_file.write(private_key.private_to_pem)
66 File.symlink(File.basename(pkey_file), "#{File.dirname(pkey_file)}/current.key")
71 def lookup_soa(domain)
72 rec = Dnsruby::Recursor.new
73 p "Domain #{domain}: Getting SOA records for #{domain}"
74 rec.query_no_validation_or_recursion(domain, 'SOA')
75 rescue StandardError => e
76 warn "Domain #{domain}: SOA lookup during deploy failed: #{e}"
80 def find_apex_domain(domain)
81 domain_soa_resp = lookup_soa(domain)
82 if domain_soa_resp.answer.empty?
83 domain_soa_resp.authority[0].name
85 domain_soa_resp.answer[0].name
89 def deploy_dns01_challenge_token(domain, challenge, nameserver, config)
90 p "Domain #{domain}: Creating DNS UPDATE packet"
92 apex_domain = find_apex_domain(domain)
94 update = Dnsruby::Update.new(apex_domain)
95 # TODO: delete challenge token record after validation
96 update.delete("#{challenge.record_name}.#{domain}", challenge.record_type)
97 update.add("#{challenge.record_name}.#{domain}", challenge.record_type, 10, challenge.record_content)
99 p "Domain #{domain}: Creating object for contacting nameserver"
100 res = Dnsruby::Resolver.new(nameserver)
103 p "Domain #{domain}: Looking up TSIG parameters"
104 tsig_name = config.dig('domains', domain, 'tsig_key') || config.dig('defaults', 'domains', 'tsig_key')
105 tsig_key = config.dig('tsig_keys', tsig_name, 'key')
106 tsig_alg = config.dig('tsig_keys', tsig_name, 'algorithm')
108 p "Domain #{domain}: Creating TSIG object"
109 tsig = Dnsruby::RR.create(
118 p "Domain #{domain}: Signing DNS UPDATE packet with TSIG object"
121 p "Domain #{domain}: Sending UPDATE to nameserver"
122 res.send_message(update)
123 rescue StandardError => e
124 warn "Domain #{domain}: DNS Update failed: #{e}"
128 def wait_for_challenge_propagation(domain, challenge)
129 rec = Dnsruby::Recursor.new
130 p "Domain #{domain}: Getting SOA records for #{domain}"
132 domain_soa_resp = rec.query_no_validation_or_recursion(domain, 'SOA')
133 rescue StandardError => e
134 warn "Domain #{domain}: SOA lookup during propagation wait failed: #{e}"
137 apex_domain = if domain_soa_resp.answer.empty?
138 domain_soa_resp.authority[0].name
140 domain_soa_resp.answer[0].name
143 p "Domain #{domain}: Creating recursor object for checking challenge propagation"
144 rec = Dnsruby::Recursor.new
145 p "Domain #{domain}: Getting NS records for #{apex_domain}"
147 domain_auth_ns = rec.query_no_validation_or_recursion(apex_domain, 'NS')
148 rescue StandardError => e
149 warn "Domain #{domain}: NS lookup failed: #{e}"
153 p "Domain #{domain}: Checking challenge status on all NS"
157 domain_auth_ns.answer.each do |ns|
158 threads << Thread.new(ns) do |my_ns|
159 nameserver = my_ns.rdata.to_s
160 p "Domain #{domain}: Creating resolver object for checking propagation on #{nameserver}"
161 res = Dnsruby::Resolver.new(nameserver)
163 res.do_caching = false
165 p "Domain #{domain}: Querying ACME challenge record"
167 result = res.query_no_validation_or_recursion("_acme-challenge.#{domain}", 'TXT')
168 rescue Dnsruby::NXDomain
169 p "Domain #{domain}: Not yet propagated, sleeping before checking again"
173 rescue StandardError => e
174 warn "Domain #{domain}: ACME challenge lookup failed: #{e}"
178 propagated = result.answer.any? do |answer|
179 answer.rdata[0] == challenge.record_content
182 p "Domain #{domain}: Not yet propagated, sleeping before checking again"
193 def wait_for_challenge_validation(challenge)
194 p 'Requesting validation of challenge'
197 challenge.request_validation
198 rescue Acme::Client::Error::BadNonce
200 p 'Retrying because of invalid nonce.'
201 retry if retries <= 5
204 while challenge.status == 'pending'
205 p 'Sleeping because challenge validation is pending'
211 rescue Acme::Client::Error::BadNonce
213 p 'Retrying because of invalid nonce.'
214 retry if retries <= 5
219 def get_cert(order, cert_name, domains, domain_key)
220 path = "./certs/#{cert_name}/"
221 crt_file = "#{path}/cert.pem"
222 p "Cert #{cert_name}: Creating CSR object"
223 csr = Acme::Client::CertificateRequest.new(
224 private_key: domain_key,
226 subject: { common_name: domains[0] }
228 p "Cert #{cert_name}: Finalize cert order"
232 rescue Acme::Client::Error::BadNonce
234 p 'Retrying because of invalid nonce.'
235 retry if retries <= 5
239 order.finalize(csr: csr)
240 rescue Acme::Client::Error::BadNonce
242 p 'Retrying because of invalid nonce.'
243 retry if retries <= 5
245 while order.status == 'processing'
246 p "Cert #{cert_name}: Sleep while order is processing"
248 p "Cert #{cert_name}: Rechecking order status"
252 rescue Acme::Client::Error::BadNonce
254 p 'Retrying because of invalid nonce.'
255 retry if retries <= 5
258 # p "order status: #{order.status}"
262 cert = order.certificate
263 rescue Acme::Client::Error::BadNonce
265 p 'Retrying because of invalid nonce.'
266 retry if retries <= 5
269 p "Cert #{cert_name}: Writing cert"
270 cert_file = File.new(path + Time.now.to_i.to_s + ".crt", 'w')
271 cert_file.write(cert)
272 if File.symlink?(File.dirname(cert_file) + "/current.crt")
273 File.unlink(File.dirname(cert_file) + "/current.crt")
274 File.symlink(File.basename(cert_file), File.dirname(cert_file) + "/current.crt")
275 elsif File.file?(File.dirname(cert_file) + "/current.crt")
276 raise 'Could not place symlink for "current.crt" because that is already a normal file.'
284 cert_dir = config.dig('global', 'cert_dir') || './certs/'
286 ensure_cert_dir(cert_dir)
289 # iterate over configured certs
290 # TODO: make this one thread per cert
291 config['certs'].each_pair do |cert_name, cert_opts|
292 acme_threads << Thread.new(cert_name, cert_opts) do |cert_name, cert_opts|
293 ensure_cert_dir(cert_dir + cert_name)
295 p "Cert #{cert_name}: Finding CA to use for cert"
296 cert_ca = cert_opts['ca'] || config.dig('defaults', 'certs', 'ca')
297 cert_ca_name = cert_ca['name']
298 cert_ca_account = cert_ca['account']
300 p "Cert #{cert_name}: Finding directory URL for CA"
301 acme_directory_url = config.dig('CAs', cert_ca_name, 'directory_url')
303 p "Cert #{cert_name}: Finding account to use for cert #{cert_name} from CA #{cert_ca_name}"
304 account = config.dig('ca_accounts', cert_ca_account)
305 email = account['email']
307 private_key = read_account_key(account['keyfile'])
309 p "Cert #{cert_name}: Creating client object for communication with CA"
310 client = Acme::Client.new(private_key: private_key, directory: acme_directory_url)
314 client.new_account(contact: "mailto:#{email}", terms_of_service_agreed: true)
315 rescue Acme::Client::Error::BadNonce
317 p 'Retrying because of invalid nonce.'
318 retry if retries <= 5
321 p "Cert #{cert_name}: Creating order object for cert #{cert_name}"
324 order = client.new_order(identifiers: cert_opts['domain_names'])
325 rescue Acme::Client::Error::BadNonce
327 p 'Retrying because of invalid nonce.'
328 retry if retries <= 5
331 p "Cert #{cert_name}: order status"
334 if order.status != 'ready'
335 p "Cert #{cert_name}: Order is not ready, we need to authorize first"
337 p "Cert #{cert_name}: Iterating over required authorizations"
340 auths = order.authorizations
341 rescue Acme::Client::Error::BadNonce
343 p 'Retrying because of invalid nonce.'
344 retry if retries <= 5
347 p "Cert #{cert_name}: Processing authorization for #{auth.domain}"
348 p "Cert #{cert_name}: Finding challenge type for #{auth.domain}"
349 # p "Cert #{cert_name}: auth is:"
351 if auth.status == 'valid'
352 p "Cert #{cert_name}: Authorization for #{auth.domain} is still valid, skipping"
356 challenge = auth.dns01
357 primary_ns = config.dig('domains', auth.domain, 'primary_ns') || config.dig('defaults', 'domains', 'primary_ns')
358 deploy_dns01_challenge_token(auth.domain, challenge, primary_ns, config)
359 wait_for_challenge_propagation(auth.domain, challenge)
360 wait_for_challenge_validation(challenge)
363 p "Cert #{cert_name}: Order is ready, we don’t need to authorize"
365 domain_key = read_cert_key(cert_name)
367 get_cert(order, cert_name, cert_opts['domain_names'], domain_key)
371 acme_threads.each(&:join)