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add support for wildcard and naked domains to PowerDNS module

This commit is contained in:
csine-nflx 2020-03-26 22:15:10 -07:00
parent db3920ed25
commit 0149f8b0d3
2 changed files with 207 additions and 66 deletions
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148
lemur/plugins/lemur_acme/powerdns.py
View File

@ -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)
@ -173,6 +167,41 @@ 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()
function = sys._getframe().f_code.co_name
log_data = {
"function": function,
"fqdn": domain,
"token": token,
}
# 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 + "."
@ -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")

63
lemur/plugins/lemur_acme/tests/test_powerdns.py
View File

@ -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)