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# --
# Copyright 2007 Nominet UK
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ++
require_relative 'spec_helper'
require "digest/md5"
class TestTSig < Minitest::Test
include Dnsruby
KEY_NAME="rubytsig"
KEY = "8n6gugn4aJ7MazyNlMccGKH1WxD2B3UvN/O/RA6iBupO2/03u9CTa3Ewz3gBWTSBCH3crY4Kk+tigNdeJBAvrw=="
def is_empty(string)
return (string == "; no data" || string == "; rdlength = 0")
end
def test_signed_update
# Dnsruby::Resolver::use_eventmachine(false)
run_test_client_signs
run_test_resolver_signs
end
# def test_signed_update_em
# begin
# Dnsruby::Resolver::use_eventmachine(true)
# rescue RuntimeError
# Dnsruby.log.error("EventMachine not installed - not running tsig EM tests")
# return
# end
# run_test_client_signs
# run_test_resolver_signs
# Dnsruby::Resolver::use_eventmachine(false)
# end
def run_test_client_signs
# NOTE - client signing is only appropriate if DNSSEC and EDNS are switched
# off. Otherwise, the resolver will attempt to alter the flags and add an
# EDNS OPT psuedo-record to the query message, invalidating the signing.
tsig = Dnsruby::RR.create({
:name => KEY_NAME,
:type => "TSIG",
:ttl => 0,
:klass => "ANY",
:algorithm => "hmac-md5",
:fudge => 300,
:key => KEY,
:error => 0
})
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
# Generate update record name, and test it has been made. Then delete it and check it has been deleted
update_name = generate_update_name
update.absent(update_name)
update.add(update_name, 'TXT', 100, "test signed update")
tsig.apply(update)
assert(update.signed?, "Update has not been signed")
res = Dnsruby::Resolver.new("ns0.validation-test-servers.nominet.org.uk")
res.udp_size=512 # Or else we needed to add OPT record already
res.dnssec=false
res.recurse=false
res.query_timeout = 20
response = res.send_message(update)
assert_equal( Dnsruby::RCode.NOERROR, response.rcode)
assert(response.verified?, "Response has not been verified")
# Now check the record exists
rr = res.query(update_name, 'TXT')
assert_equal("test signed update", rr.answer()[0].strings.join(" "), "TXT record has not been created in zone")
# Now delete the record
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
update.present(update_name, 'TXT')
update.delete(update_name)
tsig.apply(update)
assert(update.signed?, "Update has not been signed")
response = res.send_message(update)
assert_equal( Dnsruby::RCode.NOERROR, response.rcode)
assert(response.verified?, "Response has not been verified")
# Now check the record does not exist
Dnsruby::PacketSender.clear_caches
# Or else the cache will tell us it still deos!
begin
rr = res.query(update_name, 'TXT')
assert(false)
rescue Dnsruby::NXDomain
end
end
@@fudge = 0
def generate_update_name
update_name = Time.now.to_i.to_s + @@fudge.to_s
@@fudge+=1
update_name += ".update.validation-test-servers.nominet.org.uk"
return update_name
end
def run_test_resolver_signs
res = Dnsruby::Resolver.new("ns0.validation-test-servers.nominet.org.uk")
res.query_timeout=20
res.tsig=KEY_NAME, KEY
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
# Generate update record name, and test it has been made. Then delete it and check it has been deleted
update_name = generate_update_name
update.absent(update_name)
update.add(update_name, 'TXT', 100, "test signed update")
assert(!update.signed?, "Update has been signed")
response = res.send_message(update)
assert_equal( Dnsruby::RCode.NOERROR, response.rcode)
assert(response.verified?, "Response has not been verified")
# Now check the record exists
rr = res.query(update_name, 'TXT')
assert_equal("test signed update", rr.answer()[0].strings.join(" "), "TXT record has not been created in zone")
# Now delete the record
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
update.present(update_name, 'TXT')
update.delete(update_name)
tsig = Dnsruby::RR.create({
:type => 'TSIG', :klass => 'ANY',
:name => KEY_NAME,
:key => KEY
})
tsig.apply(update)
assert(update.signed?, "Update has not been signed")
res.dnssec=false # Or else we needed to add OPT record already
res.udp_size = 512
response = res.send_message(update)
assert_equal( Dnsruby::RCode.NOERROR, response.rcode)
assert(response.verified?, "Response has not been verified")
# Now check the record does not exist
Dnsruby::PacketSender.clear_caches
# Make sure the cache doesn't have an old copy!
begin
rr = res.query(update_name, 'TXT')
assert(false)
rescue Dnsruby::NXDomain
end
end
def test_message_signing
m = Dnsruby::Message.new("example.com")
m.set_tsig("name", "key")
assert(!m.signed?)
m.encode
assert(m.signed?)
m = Dnsruby::Message.new("example.com")
m.set_tsig("name", "key")
assert(!m.signed?)
m.sign!
assert(m.signed?)
m = Dnsruby::Message.new("example.com")
assert(!m.signed?)
m.sign!("name", "key")
assert(m.signed?)
end
def test_signed_zone_transfer
# test TSIG over TCP session
axfr
ixfr
end
def axfr
zt = Dnsruby::ZoneTransfer.new
zt.transfer_type = Dnsruby::Types.AXFR
zt.tsig=KEY_NAME, KEY
zt.server = "ns0.validation-test-servers.nominet.org.uk"
zone = zt.transfer("validation-test-servers.nominet.org.uk")
assert(zone.length > 0)
assert(zt.last_tsigstate==:Verified)
end
# We also test IXFR here - this is because we need to update a record (using
# TSIG) before we can test ixfr...
def ixfr
# Check the SOA serial, do an update, check that the IXFR for that soa serial gives us the update we did,
# then delete the updated record
start_soa_serial = get_soa_serial("validation-test-servers.nominet.org.uk")
# Now do an update
res = Dnsruby::Resolver.new("ns0.validation-test-servers.nominet.org.uk")
res.query_timeout=10
res.tsig=KEY_NAME, KEY
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
# Generate update record name, and test it has been made. Then delete it and check it has been deleted
update_name = Time.now.to_i.to_s + rand(100).to_s + ".update.validation-test-servers.nominet.org.uk"
update.absent(update_name)
update.add(update_name, 'TXT', 100, "test zone transfer")
assert(!update.signed?, "Update has been signed")
response = res.send_message(update)
assert(response.rcode == Dnsruby::RCode.NOERROR)
end_soa_serial = get_soa_serial("validation-test-servers.nominet.org.uk")
zt = Dnsruby::ZoneTransfer.new
zt.transfer_type = Dnsruby::Types.IXFR
zt.server = "ns0.validation-test-servers.nominet.org.uk"
zt.serial = start_soa_serial # 2007090401
deltas = zt.transfer("validation-test-servers.nominet.org.uk")
assert(deltas.length > 0)
assert(deltas.last.class == Dnsruby::ZoneTransfer::Delta)
assert_equal("test zone transfer", deltas.last.adds.last.strings.join(" "))
assert(zt.last_tsigstate==nil)
# Now delete the updated record
update = Dnsruby::Update.new("validation-test-servers.nominet.org.uk")
update.present(update_name, 'TXT')
update.delete(update_name)
response = res.send_message(update)
assert_equal( Dnsruby::RCode.NOERROR, response.rcode)
end
def get_soa_serial(name)
soa_serial = nil
Dnsruby::DNS.open {|dns|
soa_rr = dns.getresource(name, 'SOA')
soa_serial = soa_rr.serial
}
return soa_serial
end
def test_bad_tsig
res = Resolver.new
res.query_timeout=10
res.tsig=KEY_NAME, KEY
begin
ret = res.query("example.com")
assert(false, "Should not have got TSIG response from non-TSIG server!\n #{ret}\n")
rescue TsigError => e
end
end
end
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