+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)
Code Review / vpp.git / commitdiff