import unittest from scapy.layers.inet import IP, ICMP, TCP from scapy.layers.ipsec import SecurityAssociation from scapy.layers.l2 import Ether, Raw from framework import VppTestCase, VppTestRunner from util import ppp class TemplateIpsec(VppTestCase): """ TRANSPORT MODE: ------ encrypt --- |tra_if| <-------> |VPP| ------ decrypt --- TUNNEL MODE: ------ encrypt --- plain --- |tun_if| <------- |VPP| <------ |pg1| ------ --- --- ------ decrypt --- plain --- |tun_if| -------> |VPP| ------> |pg1| ------ --- --- """ remote_tun_if_host = '1.1.1.1' payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" tun_spd_id = 1 scapy_tun_sa_id = 10 scapy_tun_spi = 1001 vpp_tun_sa_id = 20 vpp_tun_spi = 1000 tra_spd_id = 2 scapy_tra_sa_id = 30 scapy_tra_spi = 2001 vpp_tra_sa_id = 40 vpp_tra_spi = 2000 vpp_esp_protocol = 1 vpp_ah_protocol = 0 auth_algo_vpp_id = 2 # internal VPP enum value for SHA1_96 auth_algo = 'HMAC-SHA1-96' # scapy name auth_key = 'C91KUR9GYMm5GfkEvNjX' crypt_algo_vpp_id = 1 # internal VPP enum value for AES_CBC_128 crypt_algo = 'AES-CBC' # scapy name crypt_key = 'JPjyOWBeVEQiMe7h' @classmethod def setUpClass(cls): super(TemplateIpsec, cls).setUpClass() cls.create_pg_interfaces(range(3)) cls.interfaces = list(cls.pg_interfaces) for i in cls.interfaces: i.admin_up() i.config_ip4() i.resolve_arp() def tearDown(self): super(TemplateIpsec, self).tearDown() if not self.vpp_dead: self.vapi.cli("show hardware") def send_and_expect(self, input, pkts, output, count=1): input.add_stream(pkts) self.pg_enable_capture(self.pg_interfaces) self.pg_start() rx = output.get_capture(count) return rx def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1): return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / sa.encrypt(IP(src=src, dst=dst) / ICMP() / self.payload) for i in range(count)] def gen_pkts(self, sw_intf, src, dst, count=1): return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / IP(src=src, dst=dst) / ICMP() / self.payload for i in range(count)] def configure_sa_tun(self): scapy_tun_sa = SecurityAssociation(self.encryption_type, spi=self.vpp_tun_spi, crypt_algo=self.crypt_algo, crypt_key=self.crypt_key, auth_algo=self.auth_algo, auth_key=self.auth_key, tunnel_header=IP( src=self.tun_if.remote_ip4, dst=self.tun_if.local_ip4)) vpp_tun_sa = SecurityAssociation(self.encryption_type, spi=self.scapy_tun_spi, crypt_algo=self.crypt_algo, crypt_key=self.crypt_key, auth_algo=self.auth_algo, auth_key=self.auth_key, tunnel_header=IP( dst=self.tun_if.remote_ip4, src=self.tun_if.local_ip4)) return vpp_tun_sa, scapy_tun_sa def configure_sa_tra(self): scapy_tra_sa = SecurityAssociation(self.encryption_type, spi=self.vpp_tra_spi, crypt_algo=self.crypt_algo, crypt_key=self.crypt_key, auth_algo=self.auth_algo, auth_key=self.auth_key) vpp_tra_sa = SecurityAssociation(self.encryption_type, spi=self.scapy_tra_spi, crypt_algo=self.crypt_algo, crypt_key=self.crypt_key, auth_algo=self.auth_algo, auth_key=self.auth_key) return vpp_tra_sa, scapy_tra_sa class IpsecTcpTests(object): def test_tcp_checksum(self): """ verify checksum correctness for vpp generated packets """ self.vapi.cli("test http server") vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun() send = (Ether(src=self.tun_if.remote_mac, dst=self.tun_if.local_mac) / scapy_tun_sa.encrypt(IP(src=self.remote_tun_if_host, dst=self.tun_if.local_ip4) / TCP(flags='S', dport=80))) self.logger.debug(ppp("Sending packet:", send)) recv = self.send_and_expect(self.tun_if, [send], self.tun_if, 1) recv = recv[0] decrypted = vpp_tun_sa.decrypt(recv[IP]) self.assert_packet_checksums_valid(decrypted) class IpsecTraTests(object): def test_tra_basic(self, count=1): """ ipsec v4 transport basic test """ try: vpp_tra_sa, scapy_tra_sa = self.configure_sa_tra() send_pkts = self.gen_encrypt_pkts(scapy_tra_sa, self.tra_if, src=self.tra_if.remote_ip4, dst=self.tra_if.local_ip4, count=count) recv_pkts = self.send_and_expect(self.tra_if, send_pkts, self.tra_if, count=count) for p in recv_pkts: decrypted = vpp_tra_sa.decrypt(p[IP]) self.assert_packet_checksums_valid(decrypted) finally: self.logger.info(self.vapi.ppcli("show error")) self.logger.info(self.vapi.ppcli("show ipsec")) def test_tra_burst(self): """ ipsec v4 transport burst test """ try: self.test_tra_basic(count=257) finally: self.logger.info(self.vapi.ppcli("show error")) self.logger.info(self.vapi.ppcli("show ipsec")) class IpsecTunTests(object): def test_tun_basic(self, count=1): """ ipsec 4o4 tunnel basic test """ try: vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun() send_pkts = self.gen_encrypt_pkts(scapy_tun_sa, self.tun_if, src=self.remote_tun_if_host, dst=self.pg1.remote_ip4, count=count) recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1, count=count) for recv_pkt in recv_pkts: self.assert_equal(recv_pkt[IP].src, self.remote_tun_if_host) self.assert_equal(recv_pkt[IP].dst, self.pg1.remote_ip4) self.assert_packet_checksums_valid(recv_pkt) send_pkts = self.gen_pkts(self.pg1, src=self.pg1.remote_ip4, dst=self.remote_tun_if_host, count=count) recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if, count=count) for recv_pkt in recv_pkts: decrypt_pkt = vpp_tun_sa.decrypt(recv_pkt[IP]) if not decrypt_pkt.haslayer(IP): decrypt_pkt = IP(decrypt_pkt[Raw].load) self.assert_equal(decrypt_pkt.src, self.pg1.remote_ip4) self.assert_equal(decrypt_pkt.dst, self.remote_tun_if_host) self.assert_packet_checksums_valid(decrypt_pkt) finally: self.logger.info(self.vapi.ppcli("show error")) self.logger.info(self.vapi.ppcli("show ipsec")) def test_tun_burst(self): """ ipsec 4o4 tunnel burst test """ try: self.test_tun_basic(count=257) finally: self.logger.info(self.vapi.ppcli("show error")) self.logger.info(self.vapi.ppcli("show ipsec")) if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)