def test_tra_anti_replay(self, count=1): """ ipsec v4 transport anti-reply test """ p = self.params[socket.AF_INET] # fire in a packet with seq number 1 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=1)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # now move the window over to 235 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=235)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=172)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # out of window are dropped pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) err = self.statistics.get_counter('/err/%s/SA replayed packet' % self.tra4_decrypt_node_name) self.assertEqual(err, 17) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) err = self.statistics.get_counter('/err/%s/Integrity check failed' % self.tra4_decrypt_node_name) self.assertEqual(err, 17) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # move the security-associations seq number on to the last we used p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351
def verify_tra_anti_replay(self, count=1): p = self.params[socket.AF_INET] use_esn = p.vpp_tra_sa.use_esn # fire in a packet with seq number 1 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=1)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # now move the window over to 235 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=235)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # replayed packets are dropped self.send_and_assert_no_replies(self.tra_if, pkt * 3) self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 3) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=172)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi, crypt_algo=p.crypt_algo, crypt_key=p.crypt_key[::-1], auth_algo=p.auth_algo, auth_key=p.auth_key[::-1]) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 17) # a malformed 'runt' packet # created by a mis-constructed SA if (ESP == self.encryption_type): bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/undersized packet' % self.tra4_decrypt_node_name, 17) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) self.send_and_expect(self.tra_if, [pkt], self.tra_if) # out of window are dropped pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) if use_esn: # an out of window error with ESN looks like a high sequence # wrap. but since it isn't then the verify will fail. self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 34) else: self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 20) # valid packet moves the window over to 236 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=236)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # move VPP's SA to just before the seq-number wrap self.vapi.cli("test ipsec sa %d seq 0xffffffff" % p.scapy_tra_sa_id) # then fire in a packet that VPP should drop because it causes the # seq number to wrap unless we're using extended. pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=237)) if use_esn: rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # in order to decrpyt the high order number needs to wrap p.vpp_tra_sa.seq_num = 0x100000000 decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # send packets with high bits set p.scapy_tra_sa.seq_num = 0x100000005 pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x100000005)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # in order to decrpyt the high order number needs to wrap decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) else: self.send_and_assert_no_replies(self.tra_if, [pkt]) self.assert_packet_counter_equal( '/err/%s/sequence number cycled' % self.tra4_encrypt_node_name, 1) # move the security-associations seq number on to the last we used self.vapi.cli("test ipsec sa %d seq 0x15f" % p.scapy_tra_sa_id) p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351
def verify_tra_anti_replay(self, count=1): p = self.params[socket.AF_INET] use_esn = p.vpp_tra_sa.use_esn # fire in a packet with seq number 1 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=1)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # now move the window over to 235 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=235)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # replayed packets are dropped self.send_and_assert_no_replies(self.tra_if, pkt * 3) self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 3) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=172)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi, crypt_algo=p.crypt_algo, crypt_key=p.crypt_key[::-1], auth_algo=p.auth_algo, auth_key=p.auth_key[::-1]) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 17) # a malformed 'runt' packet # created by a mis-constructed SA if (ESP == self.encryption_type): bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/undersized packet' % self.tra4_decrypt_node_name, 17) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) self.send_and_expect(self.tra_if, [pkt], self.tra_if) # out of window are dropped pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) if use_esn: # an out of window error with ESN looks like a high sequence # wrap. but since it isn't then the verify will fail. self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 34) else: self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 20) # valid packet moves the window over to 236 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=236)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # move VPP's SA to just before the seq-number wrap self.vapi.cli("test ipsec sa %d seq 0xffffffff" % p.scapy_tra_sa_id) # then fire in a packet that VPP should drop because it causes the # seq number to wrap unless we're using extended. pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=237)) if use_esn: rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # in order to decrpyt the high order number needs to wrap p.vpp_tra_sa.seq_num = 0x100000000 decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # send packets with high bits set p.scapy_tra_sa.seq_num = 0x100000005 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x100000005)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # in order to decrpyt the high order number needs to wrap decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) else: self.send_and_assert_no_replies(self.tra_if, [pkt]) self.assert_packet_counter_equal( '/err/%s/sequence number cycled' % self.tra4_encrypt_node_name, 1) # move the security-associations seq number on to the last we used self.vapi.cli("test ipsec sa %d seq 0x15f" % p.scapy_tra_sa_id) p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351
def verify_tra_anti_replay(self): p = self.params[socket.AF_INET] use_esn = p.vpp_tra_sa.use_esn seq_cycle_node_name = ('/err/%s/sequence number cycled' % self.tra4_encrypt_node_name) replay_node_name = ('/err/%s/SA replayed packet' % self.tra4_decrypt_node_name) if ESP == self.encryption_type and p.crypt_algo == "AES-GCM": hash_failed_node_name = ('/err/%s/ESP decryption failed' % self.tra4_decrypt_node_name) else: hash_failed_node_name = ('/err/%s/Integrity check failed' % self.tra4_decrypt_node_name) replay_count = self.statistics.get_err_counter(replay_node_name) hash_failed_count = self.statistics.get_err_counter( hash_failed_node_name) seq_cycle_count = self.statistics.get_err_counter(seq_cycle_node_name) if ESP == self.encryption_type: undersize_node_name = ('/err/%s/undersized packet' % self.tra4_decrypt_node_name) undersize_count = self.statistics.get_err_counter( undersize_node_name) # # send packets with seq numbers 1->34 # this means the window size is still in Case B (see RFC4303 # Appendix A) # # for reasons i haven't investigated Scapy won't create a packet with # seq_num=0 # pkts = [(Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=seq)) for seq in range(1, 34)] recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) # replayed packets are dropped self.send_and_assert_no_replies(self.tra_if, pkts) replay_count += len(pkts) self.assert_error_counter_equal(replay_node_name, replay_count) # # now send a batch of packets all with the same sequence number # the first packet in the batch is legitimate, the rest bogus # pkts = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=35)) recv_pkts = self.send_and_expect(self.tra_if, pkts * 8, self.tra_if, n_rx=1) replay_count += 7 self.assert_error_counter_equal(replay_node_name, replay_count) # # now move the window over to 257 (more than one byte) and into Case A # pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=257)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # replayed packets are dropped self.send_and_assert_no_replies(self.tra_if, pkt * 3) replay_count += 3 self.assert_error_counter_equal(replay_node_name, replay_count) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=200)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi, crypt_algo=p.crypt_algo, crypt_key=mk_scapy_crpyt_key(p)[::-1], auth_algo=p.auth_algo, auth_key=p.auth_key[::-1]) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) hash_failed_count += 17 self.assert_error_counter_equal(hash_failed_node_name, hash_failed_count) # a malformed 'runt' packet # created by a mis-constructed SA if (ESP == self.encryption_type and p.crypt_algo != "NULL"): bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) undersize_count += 17 self.assert_error_counter_equal(undersize_node_name, undersize_count) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) self.send_and_expect(self.tra_if, [pkt], self.tra_if) # # out of window are dropped # this is Case B. So VPP will consider this to be a high seq num wrap # and so the decrypt attempt will fail # pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) if use_esn: # an out of window error with ESN looks like a high sequence # wrap. but since it isn't then the verify will fail. hash_failed_count += 17 self.assert_error_counter_equal(hash_failed_node_name, hash_failed_count) else: replay_count += 17 self.assert_error_counter_equal(replay_node_name, replay_count) # valid packet moves the window over to 258 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=258)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # # move VPP's SA TX seq-num to just before the seq-number wrap. # then fire in a packet that VPP should drop on TX because it # causes the TX seq number to wrap; unless we're using extened sequence # numbers. # self.vapi.cli("test ipsec sa %d seq 0xffffffff" % p.scapy_tra_sa_id) self.logger.info(self.vapi.ppcli("show ipsec sa 0")) self.logger.info(self.vapi.ppcli("show ipsec sa 1")) pkts = [(Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=seq)) for seq in range(259, 280)] if use_esn: rxs = self.send_and_expect(self.tra_if, pkts, self.tra_if) # # in order for scapy to decrypt its SA's high order number needs # to wrap # p.vpp_tra_sa.seq_num = 0x100000000 for rx in rxs: decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # # wrap scapy's TX high sequence number. VPP is in case B, so it # will consider this a high seq wrap also. # The low seq num we set it to will place VPP's RX window in Case A # p.scapy_tra_sa.seq_num = 0x100000005 pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x100000005)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # # A packet that has seq num between (2^32-64) and 5 is within # the window # p.scapy_tra_sa.seq_num = 0xfffffffd pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0xfffffffd)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # # While in case A we cannot wrap the high sequence number again # becuase VPP will consider this packet to be one that moves the # window forward # pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x200000999)) self.send_and_assert_no_replies(self.tra_if, [pkt], self.tra_if) hash_failed_count += 1 self.assert_error_counter_equal(hash_failed_node_name, hash_failed_count) # # but if we move the wondow forward to case B, then we can wrap # again # p.scapy_tra_sa.seq_num = 0x100000555 pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x100000555)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) p.scapy_tra_sa.seq_num = 0x200000444 pkt = ( Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x200000444)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) else: # # without ESN TX sequence numbers can't wrap and packets are # dropped from here on out. # self.send_and_assert_no_replies(self.tra_if, pkts) seq_cycle_count += len(pkts) self.assert_error_counter_equal(seq_cycle_node_name, seq_cycle_count) # move the security-associations seq number on to the last we used self.vapi.cli("test ipsec sa %d seq 0x15f" % p.scapy_tra_sa_id) p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351
def main(): """Send and receive IPsec packet.""" args = TrafficScriptArg([ 'src_mac', 'dst_mac', 'src_ip', 'dst_ip', 'crypto_alg', 'crypto_key', 'integ_alg', 'integ_key', 'l_spi', 'r_spi' ], ['src_tun', 'dst_tun']) rxq = RxQueue(args.get_arg('rx_if')) txq = TxQueue(args.get_arg('tx_if')) src_mac = args.get_arg('src_mac') dst_mac = args.get_arg('dst_mac') src_ip = args.get_arg('src_ip') dst_ip = args.get_arg('dst_ip') crypto_alg = args.get_arg('crypto_alg') crypto_key = args.get_arg('crypto_key') integ_alg = args.get_arg('integ_alg') integ_key = args.get_arg('integ_key') l_spi = int(args.get_arg('l_spi')) r_spi = int(args.get_arg('r_spi')) src_tun = args.get_arg('src_tun') dst_tun = args.get_arg('dst_tun') is_ipv4 = True if 6 == ip_address(unicode(src_ip)).version: is_ipv4 = False tunnel_out = None tunnel_in = None if src_tun and dst_tun: if is_ipv4: tunnel_out = IP(src=src_tun, dst=dst_tun) tunnel_in = IP(src=dst_tun, dst=src_tun) else: tunnel_out = IPv6(src=src_tun, dst=dst_tun) tunnel_in = IPv6(src=dst_tun, dst=src_tun) else: src_tun = src_ip dst_tun = dst_ip sa_in = SecurityAssociation(ESP, spi=r_spi, crypt_algo=crypto_alg, crypt_key=crypto_key, auth_algo=integ_alg, auth_key=integ_key, tunnel_header=tunnel_in) sa_out = SecurityAssociation(ESP, spi=l_spi, crypt_algo=crypto_alg, crypt_key=crypto_key, auth_algo=integ_alg, auth_key=integ_key, tunnel_header=tunnel_out) sent_packets = [] if is_ipv4: ip_pkt = IP(src=src_ip, dst=dst_ip) / \ ICMP() ip_pkt = IP(str(ip_pkt)) else: ip_pkt = IPv6(src=src_ip, dst=dst_ip) / \ ICMPv6EchoRequest() ip_pkt = IPv6(str(ip_pkt)) e_pkt = sa_out.encrypt(ip_pkt) pkt_send = Ether(src=src_mac, dst=dst_mac) / \ e_pkt sent_packets.append(pkt_send) txq.send(pkt_send) pkt_recv = rxq.recv(2, sent_packets) if pkt_recv is None: raise RuntimeError('ESP packet Rx timeout') if is_ipv4: check_ipv4(pkt_recv, src_tun, dst_ip, src_ip, sa_in) else: check_ipv6(pkt_recv, src_tun, dst_ip, src_ip, sa_in) sys.exit(0)
def main(): """Send and receive IPsec packet.""" args = TrafficScriptArg([ u"tx_src_mac", u"tx_dst_mac", u"rx_src_mac", u"rx_dst_mac", u"src_ip", u"dst_ip", u"crypto_alg", u"crypto_key", u"integ_alg", u"integ_key", u"l_spi", u"r_spi" ], [u"src_tun", u"dst_tun"]) tx_txq = TxQueue(args.get_arg(u"tx_if")) tx_rxq = RxQueue(args.get_arg(u"tx_if")) rx_txq = TxQueue(args.get_arg(u"rx_if")) rx_rxq = RxQueue(args.get_arg(u"rx_if")) tx_src_mac = args.get_arg(u"tx_src_mac") tx_dst_mac = args.get_arg(u"tx_dst_mac") rx_src_mac = args.get_arg(u"rx_src_mac") rx_dst_mac = args.get_arg(u"rx_dst_mac") src_ip = args.get_arg(u"src_ip") dst_ip = args.get_arg(u"dst_ip") crypto_alg = args.get_arg(u"crypto_alg") crypto_key = args.get_arg(u"crypto_key") integ_alg = args.get_arg(u"integ_alg") integ_key = args.get_arg(u"integ_key") l_spi = int(args.get_arg(u"l_spi")) r_spi = int(args.get_arg(u"r_spi")) src_tun = args.get_arg(u"src_tun") dst_tun = args.get_arg(u"dst_tun") ip_layer = IP if ip_address(src_ip).version == 4 else IPv6 tunnel_out = ip_layer(src=src_tun, dst=dst_tun) if src_tun and dst_tun \ else None tunnel_in = ip_layer(src=dst_tun, dst=src_tun) if src_tun and dst_tun \ else None if not (src_tun and dst_tun): src_tun = src_ip sa_in = SecurityAssociation(ESP, spi=r_spi, crypt_algo=crypto_alg, crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg, auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_in) sa_out = SecurityAssociation( ESP, spi=l_spi, crypt_algo=crypto_alg, crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg, auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_out) ip_pkt = ip_layer(src=src_ip, dst=dst_ip, proto=61) if ip_layer == IP \ else ip_layer(src=src_ip, dst=dst_ip) ip_pkt = ip_layer(ip_pkt) e_pkt = sa_out.encrypt(ip_pkt) tx_pkt_send = (Ether(src=tx_src_mac, dst=tx_dst_mac) / e_pkt) sent_packets = list() tx_pkt_send /= Raw() sent_packets.append(tx_pkt_send) tx_txq.send(tx_pkt_send) while True: rx_pkt_recv = rx_rxq.recv(2) if rx_pkt_recv is None: raise RuntimeError(f"{ip_layer.name} packet Rx timeout") if rx_pkt_recv.haslayer(ICMPv6ND_NS): # read another packet in the queue if the current one is ICMPv6ND_NS continue else: # otherwise process the current packet break check_ip(rx_pkt_recv, ip_layer, src_ip, dst_ip) rx_ip_pkt = ip_layer(src=dst_ip, dst=src_ip, proto=61) if ip_layer == IP \ else ip_layer(src=dst_ip, dst=src_ip) rx_pkt_send = (Ether(src=rx_dst_mac, dst=rx_src_mac) / rx_ip_pkt) rx_pkt_send /= Raw() rx_txq.send(rx_pkt_send) while True: tx_pkt_recv = tx_rxq.recv(2, sent_packets) if tx_pkt_recv is None: raise RuntimeError(u"ESP packet Rx timeout") if tx_pkt_recv.haslayer(ICMPv6ND_NS): # read another packet in the queue if the current one is ICMPv6ND_NS continue else: # otherwise process the current packet break check_ipsec(tx_pkt_recv, ip_layer, src_tun, dst_ip, src_ip, sa_in) sys.exit(0)
def test_tra_anti_replay(self, count=1): """ ipsec v4 transport anti-reply test """ p = self.params[socket.AF_INET] # fire in a packet with seq number 1 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=1)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # now move the window over to 235 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=235)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=172)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # out of window are dropped pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 17) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 17) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) self.send_and_expect(self.tra_if, [pkt], self.tra_if) # move VPP's SA to just before the seq-number wrap self.vapi.cli("test ipsec sa %d seq 0xffffffff" % p.scapy_tra_sa_id) # then fire in a packet that VPP should drop becuase it causes the # seq number to wrap pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=236)) self.send_and_assert_no_replies(self.tra_if, [pkt]) self.assert_packet_counter_equal( '/err/%s/sequence number cycled' % self.tra4_encrypt_node_name, 1) # move the security-associations seq number on to the last we used self.vapi.cli("test ipsec sa %d seq 0x15f" % p.scapy_tra_sa_id) p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351
def main(): """Send and receive IPsec packet.""" args = TrafficScriptArg( [ u"tx_src_mac", u"tx_dst_mac", u"rx_src_mac", u"rx_dst_mac", u"src_ip", u"dst_ip", u"src_tun", u"dst_tun", u"crypto_alg", u"crypto_key", u"integ_alg", u"integ_key", u"l_spi", u"r_spi" ] ) tx_txq = TxQueue(args.get_arg(u"tx_if")) tx_rxq = RxQueue(args.get_arg(u"tx_if")) rx_txq = TxQueue(args.get_arg(u"rx_if")) rx_rxq = RxQueue(args.get_arg(u"rx_if")) tx_src_mac = args.get_arg(u"tx_src_mac") tx_dst_mac = args.get_arg(u"tx_dst_mac") rx_src_mac = args.get_arg(u"rx_src_mac") rx_dst_mac = args.get_arg(u"rx_dst_mac") src_ip = args.get_arg(u"src_ip") dst_ip = args.get_arg(u"dst_ip") src_tun = args.get_arg(u"src_tun") dst_tun = args.get_arg(u"dst_tun") crypto_alg = args.get_arg(u"crypto_alg") crypto_key = args.get_arg(u"crypto_key") integ_alg = args.get_arg(u"integ_alg") integ_key = args.get_arg(u"integ_key") l_spi = int(args.get_arg(u"l_spi")) r_spi = int(args.get_arg(u"r_spi")) ip_layer = IP if ip_address(src_ip).version == 4 else IPv6 ip_pkt = ip_layer(src=src_ip, dst=dst_ip, proto=61) if ip_layer == IP \ else ip_layer(src=src_ip, dst=dst_ip) tunnel_in = ip_layer(src=src_tun, dst=dst_tun) tunnel_out = ip_layer(src=dst_tun, dst=src_tun) sa_in = SecurityAssociation( ESP, spi=l_spi, crypt_algo=crypto_alg, crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg, auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_in ) sa_out = SecurityAssociation( ESP, spi=r_spi, crypt_algo=crypto_alg, crypt_key=crypto_key.encode(encoding=u"utf-8"), auth_algo=integ_alg, auth_key=integ_key.encode(encoding=u"utf-8"), tunnel_header=tunnel_out ) sent_packets = list() tx_pkt_send = (Ether(src=tx_src_mac, dst=tx_dst_mac) / ip_pkt) tx_pkt_send /= Raw() size_limit = 78 if ip_layer == IPv6 else 64 if len(tx_pkt_send) < size_limit: tx_pkt_send[Raw].load += (b"\0" * (size_limit - len(tx_pkt_send))) sent_packets.append(tx_pkt_send) tx_txq.send(tx_pkt_send) while True: rx_pkt_recv = rx_rxq.recv(2) if rx_pkt_recv is None: raise RuntimeError(f"{ip_layer.__name__} packet Rx timeout") if rx_pkt_recv.haslayer(ICMPv6ND_NS): # read another packet in the queue if the current one is ICMPv6ND_NS continue elif rx_pkt_recv.haslayer(ICMPv6MLReport2): # read another packet in the queue if the current one is # ICMPv6MLReport2 continue elif rx_pkt_recv.haslayer(ICMPv6ND_RA): # read another packet in the queue if the current one is # ICMPv6ND_RA continue # otherwise process the current packet break check_ipsec( rx_pkt_recv, ip_layer, rx_src_mac, rx_dst_mac, src_tun, dst_tun, src_ip, dst_ip, sa_in ) ip_pkt = ip_layer(src=dst_ip, dst=src_ip, proto=61) if ip_layer == IP \ else ip_layer(src=dst_ip, dst=src_ip) ip_pkt /= Raw() if len(ip_pkt) < (size_limit - 14): ip_pkt[Raw].load += (b"\0" * (size_limit - 14 - len(ip_pkt))) e_pkt = sa_out.encrypt(ip_pkt) rx_pkt_send = (Ether(src=rx_dst_mac, dst=rx_src_mac) / e_pkt) rx_txq.send(rx_pkt_send) while True: tx_pkt_recv = tx_rxq.recv(2, ignore=sent_packets) if tx_pkt_recv is None: raise RuntimeError(f"{ip_layer.__name__} packet Rx timeout") if tx_pkt_recv.haslayer(ICMPv6ND_NS): # read another packet in the queue if the current one is ICMPv6ND_NS continue elif tx_pkt_recv.haslayer(ICMPv6MLReport2): # read another packet in the queue if the current one is # ICMPv6MLReport2 continue elif tx_pkt_recv.haslayer(ICMPv6MLReport2): # read another packet in the queue if the current one is # ICMPv6MLReport2 continue elif tx_pkt_recv.haslayer(ICMPv6ND_RA): # read another packet in the queue if the current one is # ICMPv6ND_RA continue # otherwise process the current packet break check_ip(tx_pkt_recv, ip_layer, tx_dst_mac, tx_src_mac, dst_ip, src_ip) sys.exit(0)
def test_tra_anti_replay(self, count=1): """ ipsec v4 transport anti-reply test """ p = self.params[socket.AF_INET] # fire in a packet with seq number 1 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=1)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # now move the window over to 235 pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=235)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # the window size is 64 packets # in window are still accepted pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=172)) recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # out of window are dropped pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 17) # a packet that does not decrypt does not move the window forward bogus_sa = SecurityAssociation(self.encryption_type, p.vpp_tra_spi) pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) self.send_and_assert_no_replies(self.tra_if, pkt * 17) self.assert_packet_counter_equal( '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 17) # which we can determine since this packet is still in the window pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=234)) self.send_and_expect(self.tra_if, [pkt], self.tra_if) # move VPP's SA to just before the seq-number wrap self.vapi.cli("test ipsec sa %d seq 0xffffffff" % p.scapy_tra_sa_id) # then fire in a packet that VPP should drop becuase it causes the # seq number to wrap pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4) / ICMP(), seq_num=236)) self.send_and_assert_no_replies(self.tra_if, [pkt]) self.assert_packet_counter_equal( '/err/%s/sequence number cycled' % self.tra4_encrypt_node_name, 1) # move the security-associations seq number on to the last we used self.vapi.cli("test ipsec sa %d seq 0x15f" % p.scapy_tra_sa_id) p.scapy_tra_sa.seq_num = 351 p.vpp_tra_sa.seq_num = 351