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# Unix SMB/CIFS implementation.
# Copyright (C) Kai Blin <kai@samba.org> 2011
# Copyright (C) Ralph Boehme <slow@samba.org> 2016
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import sys
import optparse
import samba.getopt as options
from samba.dcerpc import dns
from samba.tests.subunitrun import SubunitOptions, TestProgram
from samba.tests.dns_base import DNSTKeyTest
parser = optparse.OptionParser("dns_tkey.py <server name> <server ip> [options]")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
# This timeout only has relevance when testing against Windows
# Format errors tend to return patchy responses, so a timeout is needed.
parser.add_option("--timeout", type="int", dest="timeout",
help="Specify timeout for DNS requests")
# use command line creds if available
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
subunitopts = SubunitOptions(parser)
parser.add_option_group(subunitopts)
opts, args = parser.parse_args()
timeout = opts.timeout
if len(args) < 2:
parser.print_usage()
sys.exit(1)
server_name = args[0]
server_ip = args[1]
class TestDNSUpdates(DNSTKeyTest):
def setUp(self):
self.server = server_name
self.server_ip = server_ip
super().setUp()
def test_tkey(self):
"test DNS TKEY handshake"
self.tkey_trans()
def test_update_wo_tsig(self):
"test DNS update without TSIG record"
p = self.make_update_request()
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_REFUSED)
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_NXDOMAIN)
def test_update_tsig_bad_keyname(self):
"test DNS update with a TSIG record with a bad keyname"
self.tkey_trans()
p = self.make_update_request()
self.sign_packet(p, "badkey")
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_NOTAUTH)
tsig_record = response.additional[0].rdata
self.assertEqual(tsig_record.error, dns.DNS_RCODE_BADKEY)
self.assertEqual(tsig_record.mac_size, 0)
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_NXDOMAIN)
def test_update_tsig_bad_mac(self):
"test DNS update with a TSIG record with a bad MAC"
self.tkey_trans()
p = self.make_update_request()
self.bad_sign_packet(p, self.key_name)
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_NOTAUTH)
tsig_record = response.additional[0].rdata
self.assertEqual(tsig_record.error, dns.DNS_RCODE_BADSIG)
self.assertEqual(tsig_record.mac_size, 0)
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_NXDOMAIN)
def test_update_tsig(self):
"test DNS update with correct TSIG record"
self.tkey_trans()
p = self.make_update_request()
mac = self.sign_packet(p, self.key_name)
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.verify_packet(response, response_p, mac)
# Check the record is around
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_OK)
# Now delete the record
p = self.make_update_request(delete=True)
mac = self.sign_packet(p, self.key_name)
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.verify_packet(response, response_p, mac)
# check it's gone
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_NXDOMAIN)
def test_update_tsig_windows(self):
"test DNS update with correct TSIG record (follow Windows pattern)"
newrecname = "win" + self.newrecname
rr_class = dns.DNS_QCLASS_IN
ttl = 1200
p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
q = self.make_name_question(self.get_dns_domain(),
dns.DNS_QTYPE_SOA,
dns.DNS_QCLASS_IN)
questions = []
questions.append(q)
self.finish_name_packet(p, questions)
updates = []
r = dns.res_rec()
r.name = newrecname
r.rr_type = dns.DNS_QTYPE_A
r.rr_class = dns.DNS_QCLASS_ANY
r.ttl = 0
r.length = 0
updates.append(r)
r = dns.res_rec()
r.name = newrecname
r.rr_type = dns.DNS_QTYPE_AAAA
r.rr_class = dns.DNS_QCLASS_ANY
r.ttl = 0
r.length = 0
updates.append(r)
r = dns.res_rec()
r.name = newrecname
r.rr_type = dns.DNS_QTYPE_A
r.rr_class = rr_class
r.ttl = ttl
r.length = 0xffff
r.rdata = "10.1.45.64"
updates.append(r)
p.nscount = len(updates)
p.nsrecs = updates
prereqs = []
r = dns.res_rec()
r.name = newrecname
r.rr_type = dns.DNS_QTYPE_CNAME
r.rr_class = dns.DNS_QCLASS_NONE
r.ttl = 0
r.length = 0
prereqs.append(r)
p.ancount = len(prereqs)
p.answers = prereqs
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_REFUSED)
self.tkey_trans()
mac = self.sign_packet(p, self.key_name)
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.verify_packet(response, response_p, mac)
# Check the record is around
rcode = self.search_record(newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_OK)
# Now delete the record
p = self.make_update_request(delete=True)
mac = self.sign_packet(p, self.key_name)
(response, response_p) = self.dns_transaction_udp(p, self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.verify_packet(response, response_p, mac)
# check it's gone
rcode = self.search_record(self.newrecname)
self.assert_rcode_equals(rcode, dns.DNS_RCODE_NXDOMAIN)
TestProgram(module=__name__, opts=subunitopts)
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