From 0149f8b0d3b9c86739000c8372d92d7ac2d2ace3 Mon Sep 17 00:00:00 2001 From: csine-nflx Date: Thu, 26 Mar 2020 22:15:10 -0700 Subject: [PATCH] add support for wildcard and naked domains to PowerDNS module --- lemur/plugins/lemur_acme/powerdns.py | 210 +++++++++++++----- .../plugins/lemur_acme/tests/test_powerdns.py | 63 +++++- 2 files changed, 207 insertions(+), 66 deletions(-) diff --git a/lemur/plugins/lemur_acme/powerdns.py b/lemur/plugins/lemur_acme/powerdns.py index a26faaac..e3f7e575 100644 --- a/lemur/plugins/lemur_acme/powerdns.py +++ b/lemur/plugins/lemur_acme/powerdns.py @@ -49,16 +49,20 @@ class Record: return self._data["name"] @property - def disabled(self): - return self._data["disabled"] + def type(self): + return self._data["type"] + + @property + def ttl(self): + return self._data["ttl"] @property def content(self): return self._data["content"] @property - def ttl(self): - return self._data["ttl"] + def disabled(self): + return self._data["disabled"] def get_zones(account_number): @@ -92,42 +96,32 @@ def get_zones(account_number): def create_txt_record(domain, token, account_number): """ Create a TXT record for the given domain and token and return a change_id tuple """ _check_conf() - zone_name = _get_zone_name(domain, account_number) - server_id = current_app.config.get("ACME_POWERDNS_SERVERID", "localhost") - zone_id = zone_name + "." - domain_id = domain + "." - path = f"/api/v1/servers/{server_id}/zones/{zone_id}" - payload = { - "rrsets": [ - { - "name": domain_id, - "type": "TXT", - "ttl": 300, - "changetype": "REPLACE", - "records": [ - { - "content": f"\"{token}\"", - "disabled": False - } - ], - "comments": [] - } - ] - } + function = sys._getframe().f_code.co_name log_data = { "function": function, "fqdn": domain, "token": token, } + + # Create new record + domain_id = domain + "." + records = [Record({'name': domain_id, 'content': f"\"{token}\"", 'disabled': False})] + + # Get current records + cur_records = _get_txt_records(domain) + for record in cur_records: + if record.content != token: + records.append(record) + try: - _patch(path, payload) - log_data["message"] = "TXT record successfully created" + _patch_txt_records(domain, account_number, records) + log_data["message"] = "TXT record(s) successfully created" current_app.logger.debug(log_data) except Exception as e: sentry.captureException() log_data["Exception"] = e - log_data["message"] = "Unable to create TXT record" + log_data["message"] = "Unable to create TXT record(s)" current_app.logger.debug(log_data) change_id = (domain, token) @@ -173,43 +167,78 @@ def wait_for_dns_change(change_id, account_number=None): def delete_txt_record(change_id, account_number, domain, token): """ Delete the TXT record for the given domain and token """ _check_conf() - zone_name = _get_zone_name(domain, account_number) - server_id = current_app.config.get("ACME_POWERDNS_SERVERID", "localhost") - zone_id = zone_name + "." - domain_id = domain + "." - path = f"/api/v1/servers/{server_id}/zones/{zone_id}" - payload = { - "rrsets": [ - { - "name": domain_id, - "type": "TXT", - "ttl": 300, - "changetype": "DELETE", - "records": [ - { - "content": f"\"{token}\"", - "disabled": False - } - ], - "comments": [] - } - ] - } + function = sys._getframe().f_code.co_name log_data = { "function": function, "fqdn": domain, - "token": token + "token": token, } - try: - _patch(path, payload) - log_data["message"] = "TXT record successfully deleted" - current_app.logger.debug(log_data) - except Exception as e: - sentry.captureException() - log_data["Exception"] = e - log_data["message"] = "Unable to delete TXT record" + + # Determine if we can delete whole RRset or just one record + cur_records = _get_txt_records(domain) + found = False + new_records = [] + for record in cur_records: + if record.content == f"\"{token}\"": + found = True + else: + new_records.append(record) + + if not found: # Record not found in DNS + log_data["message"] = "Unable to delete TXT record: TXT record not found" current_app.logger.debug(log_data) + return + + elif new_records: # Removing Record from RRSet via Patch + try: + _patch_txt_records(domain, account_number, new_records) + log_data["message"] = "TXT record successfully deleted" + current_app.logger.debug(log_data) + except Exception as e: + sentry.captureException() + log_data["Exception"] = e + log_data["message"] = "Unable to delete TXT record: patching exception" + current_app.logger.debug(log_data) + + else: # Delete current records + zone_name = _get_zone_name(domain, account_number) + server_id = current_app.config.get("ACME_POWERDNS_SERVERID", "localhost") + zone_id = zone_name + "." + domain_id = domain + "." + path = f"/api/v1/servers/{server_id}/zones/{zone_id}" + payload = { + "rrsets": [ + { + "name": domain_id, + "type": "TXT", + "ttl": 300, + "changetype": "DELETE", + "records": [ + { + "content": f"\"{token}\"", + "disabled": False + } + ], + "comments": [] + } + ] + } + function = sys._getframe().f_code.co_name + log_data = { + "function": function, + "fqdn": domain, + "token": token + } + try: + _patch(path, payload) + log_data["message"] = "TXT record successfully deleted" + current_app.logger.debug(log_data) + except Exception as e: + sentry.captureException() + log_data["Exception"] = e + log_data["message"] = "Unable to delete TXT record" + current_app.logger.debug(log_data) def _check_conf(): @@ -243,6 +272,33 @@ def _get_zone_name(domain, account_number): return zone_name +def _get_txt_records(domain): + """Retrieve TXT records for a given domain and return list of Record Objects""" + server_id = current_app.config.get("ACME_POWERDNS_SERVERID", "localhost") + + path = f"/api/v1/servers/{server_id}/search-data?q={domain}&max=100&object_type=record" + function = sys._getframe().f_code.co_name + log_data = { + "function": function + } + try: + records = _get(path) + log_data["message"] = "Retrieved TXT Records Successfully" + current_app.logger.debug(log_data) + + except Exception as e: + sentry.captureException() + log_data["message"] = "Failed to Retrieve TXT Records" + current_app.logger.debug(log_data) + raise + + txt_records = [] + for record in records: + cur_record = Record(record) + txt_records.append(cur_record) + return txt_records + + def _get(path, params=None): """ Execute a GET request on the given URL (base_uri + path) and return response as JSON object """ base_uri = current_app.config.get("ACME_POWERDNS_DOMAIN") @@ -257,6 +313,40 @@ def _get(path, params=None): return resp.json() +def _patch_txt_records(domain, account_number, records): + """Send Patch request to PowerDNS Server""" + + domain_id = domain + "." + + # Create records + txt_records = [] + for record in records: + txt_records.append( + {'content': record.content, 'disabled': record.disabled} + ) + + # Create RRSet + payload = { + "rrsets": [ + { + "name": domain_id, + "type": "TXT", + "ttl": 300, + "changetype": "REPLACE", + "records": txt_records, + "comments": [] + } + ] + } + + # Create Txt Records + server_id = current_app.config.get("ACME_POWERDNS_SERVERID", "localhost") + zone_name = _get_zone_name(domain, account_number) + zone_id = zone_name + "." + path = f"/api/v1/servers/{server_id}/zones/{zone_id}" + _patch(path, payload) + + def _patch(path, payload): """ Execute a Patch request on the given URL (base_uri + path) with given payload """ base_uri = current_app.config.get("ACME_POWERDNS_DOMAIN") diff --git a/lemur/plugins/lemur_acme/tests/test_powerdns.py b/lemur/plugins/lemur_acme/tests/test_powerdns.py index c8b0a11e..d24827bb 100644 --- a/lemur/plugins/lemur_acme/tests/test_powerdns.py +++ b/lemur/plugins/lemur_acme/tests/test_powerdns.py @@ -48,13 +48,14 @@ class TestPowerdns(unittest.TestCase): self.assertEqual(result, zone) @patch("lemur.plugins.lemur_acme.powerdns.current_app") - def test_create_txt_record(self, mock_current_app): + def test_create_txt_record_write_only(self, mock_current_app): domain = "_acme_challenge.test.example.com" zone = "test.example.com" token = "ABCDEFGHIJ" account_number = "1234567890" change_id = (domain, token) powerdns._check_conf = Mock() + powerdns._get_txt_records = Mock(return_value=[]) powerdns._get_zone_name = Mock(return_value=zone) mock_current_app.logger.debug = Mock() mock_current_app.config.get = Mock(return_value="localhost") @@ -63,24 +64,74 @@ class TestPowerdns(unittest.TestCase): "function": "create_txt_record", "fqdn": domain, "token": token, - "message": "TXT record successfully created" + "message": "TXT record(s) successfully created" } result = powerdns.create_txt_record(domain, token, account_number) mock_current_app.logger.debug.assert_called_with(log_data) self.assertEqual(result, change_id) + @patch("lemur.plugins.lemur_acme.powerdns.current_app") + def test_create_txt_record_append(self, mock_current_app): + domain = "_acme_challenge.test.example.com" + zone = "test.example.com" + token = "ABCDEFGHIJ" + account_number = "1234567890" + change_id = (domain, token) + powerdns._check_conf = Mock() + cur_token = "123456" + cur_records = [powerdns.Record({'name': domain, 'content': cur_token, 'disabled': False})] + powerdns._get_txt_records = Mock(return_value=cur_records) + powerdns._get_zone_name = Mock(return_value=zone) + mock_current_app.logger.debug = Mock() + mock_current_app.config.get = Mock(return_value="localhost") + powerdns._patch = Mock() + log_data = { + "function": "create_txt_record", + "fqdn": domain, + "token": token, + "message": "TXT record(s) successfully created" + } + expected_path = f"/api/v1/servers/localhost/zones/test.example.com." + expected_payload = { + "rrsets": [ + { + "name": domain + ".", + "type": "TXT", + "ttl": 300, + "changetype": "REPLACE", + "records": [ + { + "content": f"\"{token}\"", + "disabled": False + }, + { + "content": f"\"{cur_token}\"", + "disabled": False + } + ], + "comments": [] + } + ] + } + + result = powerdns.create_txt_record(domain, token, account_number) + mock_current_app.logger.debug.assert_called_with(log_data) + powerdns._patch.assert_called_with(expected_path, expected_payload) + self.assertEqual(result, change_id) + @patch("lemur.plugins.lemur_acme.powerdns.dnsutil") @patch("lemur.plugins.lemur_acme.powerdns.current_app") @patch("lemur.extensions.metrics") @patch("time.sleep") def test_wait_for_dns_change(self, mock_sleep, mock_metrics, mock_current_app, mock_dnsutil): domain = "_acme-challenge.test.example.com" - token = "ABCDEFG" + token1 = "ABCDEFG" + token2 = "HIJKLMN" zone_name = "test.example.com" nameserver = "1.1.1.1" - change_id = (domain, token) + change_id = (domain, token1) powerdns._check_conf = Mock() - mock_records = (token,) + mock_records = (token2, token1) mock_current_app.config.get = Mock(return_value=1) powerdns._get_zone_name = Mock(return_value=zone_name) mock_dnsutil.get_authoritative_nameserver = Mock(return_value=nameserver) @@ -114,7 +165,7 @@ class TestPowerdns(unittest.TestCase): "function": "delete_txt_record", "fqdn": domain, "token": token, - "message": "TXT record successfully deleted" + "message": "Unable to delete TXT record: TXT record not found" } powerdns.delete_txt_record(change_id, account_number, domain, token) mock_current_app.logger.debug.assert_called_with(log_data)