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|
#!/usr/bin/ruby
# require 'net/http'
# require 'json'
require 'yaml'
require 'openssl'
require 'acme-client'
require 'dnsruby'
require 'time'
def read_config( path = 'config.yaml' )
p "Reading config from #{path}"
begin
config = YAML.load_file( path )
rescue Psych::SyntaxError
$stderr.puts "Parsing configfile failed: " + $!.to_s
raise
rescue Errno::ENOENT => ex
$stderr.puts "IO failed: " + $!.to_s
p ex
end
return config
end
def read_account_key( path = 'pkey.pem' )
p "Reading account key from #{path}"
if File.readable?( path )
p "Key exists, trying to parse"
pkey_file = File.new( path )
privatekey_string = pkey_file.read
private_key = OpenSSL::PKey::EC.new( privatekey_string )
else
p "Key does not exist, trying to create"
pkey_file = File.new( path, 'w' )
private_key = OpenSSL::PKey::EC.generate( "prime256v1" )
pkey_pem = private_key.private_to_pem
pkey_file.write( pkey_pem )
end
end
def deploy_dns01_challenge_token( domain, token, nameserver, config )
p "Creating DNS UPDATE packet"
update = Dnsruby::Update.new( domain )
# TODO: delete challenge token record after validation
update.delete( "_acme-challenge." + domain , 'TXT' )
update.add( "_acme-challenge." + domain, 'TXT', 10, token )
p "Creating object for contacting nameserver"
res = Dnsruby::Resolver.new( nameserver )
res.dnssec = false
p "Looking up TSIG parameters"
tsig_name = config['domains'][domain]['tsig_key']
tsig_key = config['tsig_keys'][tsig_name]['key']
tsig_alg = config['tsig_keys'][tsig_name]['algorithm']
p "Creating TSIG object"
tsig = Dnsruby::RR.create({
:name => tsig_name,
:type => 'TSIG',
:key => tsig_key,
:algorithm => tsig_alg,
})
p "Signing DNS UPDATE packet with TSIG object"
tsig.apply(update)
p "Sending UPDATE to nameserver"
response = res.send_message(update)
end
def wait_for_challenge_propagation( domain, challenge )
p "Creating recursor object for checking challenge propagation"
rec = Dnsruby::Recursor.new
p "Getting NS records for #{domain}"
domain_auth_ns = rec.query_no_validation_or_recursion( domain, "NS" )
p "Checking challenge status on all NS"
domain_auth_ns.answer.each do |ns|
nameserver = ns.rdata.to_s
p "Creating resolver object for checking propagation on #{nameserver}"
res = Dnsruby::Resolver.new( nameserver )
res.dnssec = false
res.do_caching = false
begin
p "Querying ACME challenge record"
result = res.query_no_validation_or_recursion( "_acme-challenge." + domain, "TXT" )
p result
propagated = result.answer.any? do |answer|
p "Checking response"
p answer
p answer.rdata[0]
p "against challenge string"
p challenge.record_content
answer.rdata[0] == challenge.record_content
end
unless propagated
p "Sleeping before checking again"
sleep(1)
end
end until propagated
end
end
def wait_for_challenge_validation( challenge )
p "Requesting validation of challenge"
challenge.request_validation
while challenge.status == 'pending'
p "Sleeping because challenge validation is pending"
sleep(1)
p "Checking again"
challenge.reload
end
end
def get_cert_key( domain )
path = "./domains/#{domain}/"
key_file = path + "current.key"
p "Reading cert key from #{key_file}"
if File.readable?( key_file )
p "Cert key is readable, trying to read"
pkey_file = File.new( key_file )
privatekey_string = pkey_file.read
domain_key = OpenSSL::PKey::EC.new( privatekey_string )
else
p "Cert key is not readable, trying to create one"
pkey_file = File.new( path + Time.now.to_i.to_s + ".key", 'w' )
domain_key = OpenSSL::PKey::EC.generate( "prime256v1" )
pkey_pem = domain_key.private_to_pem
pkey_file.write( pkey_pem )
File.symlink( File.basename( pkey_file ), File.dirname( pkey_file ) + "/current.key" )
end
return domain_key
end
def get_cert( order, domains, domain_key )
path = "./domains/#{domains[0]}/"
crt_file = path + "cert.pem"
p "Creating CSR object"
csr = Acme::Client::CertificateRequest.new(private_key: domain_key, names: domains, subject: { common_name: "#{domains[0]}" })
p "Finalize cert order"
order.finalize(csr: csr)
while order.status == 'processing'
p "Sleep while order is processing"
sleep(1)
p "Rechecking order status"
order.reload
end
cert = order.certificate
p "Writing cert"
cert_file = File.new( path + Time.now.to_i.to_s + ".crt", 'w' )
cert_file.write( cert )
if File.symlink?( File.dirname( cert_file ) + "/current.crt" ) then
File.unlink( File.dirname( cert_file ) + "/current.crt" )
File.symlink( File.basename( cert_file ), File.dirname( cert_file ) + "/current.crt" )
else
raise Exception
end
return cert
end
config = read_config
# iterate over configured certs
# TODO: make this one thread per cert
config['certs'].each_pair do |cert_name, cert_opts|
p "Finding CA to use for cert #{cert_name}"
acme_directory_url = config['CAs'][cert_opts['ca']['name']]['directory_url']
p "Finding account to use for cert #{cert_name} from CA #{cert_opts['ca']['name']}"
account = config['ca_accounts'][cert_opts['ca']['account']]
email = account['email']
private_key = read_account_key( account['keyfile'] )
p "Creating client object for communication with CA"
client = Acme::Client.new( private_key: private_key, directory: acme_directory_url )
client.new_account(contact: "mailto:#{email}", terms_of_service_agreed: true)
p "Creating order object for cert #{cert_name}"
order = client.new_order(identifiers: cert_opts['domain_names'] )
if order.status != "ready" then
p "Order is not ready, we need to authorize first"
p "Iterating over required authorizations"
order.authorizations.each do |auth|
p "Processing authorization for #{auth.domain}"
p "Finding challenge type for #{auth.domain}"
p config['domains'][auth.domain]['challenge']
challenge = auth.dns01
deploy_dns01_challenge_token( auth.domain, challenge.record_content, config['domains'][auth.domain]['primary_ns'], config )
wait_for_challenge_propagation( auth.domain, challenge )
wait_for_challenge_validation( challenge )
end
# deploy_dns01_challenge_token( cert_opts['domain_names'][0], challenge.record_content, cert_opts['challenge']['primary_ns'], config )
else
p "Order is ready, we don’t need to authorize"
end
domain_key = get_cert_key( cert_opts['domain_names'][0] )
get_cert( order, cert_opts['domain_names'], domain_key )
end
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