ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums

Calculate IP/TCP/UDP checksums in software before adding authentication.

Change-Id: I3e121cb00aeba667764f39ade8d62170f18f8b6b
Signed-off-by: Klement Sekera <ksekera@cisco.com>

1 files changed, 98 insertions, 189 deletions

diff --git a/test/test_ipsec_ah.py b/test/test_ipsec_ah.py
index d173b2e3b23..729f8716d03 100644
--- a/test/test_ipsec_ah.py
+++ b/test/test_ipsec_ah.py
@@ -1,14 +1,14 @@
 import socket
 import unittest
 
-from scapy.layers.inet import IP, ICMP
-from scapy.layers.l2 import Ether, Raw
-from scapy.layers.ipsec import SecurityAssociation, AH
+from scapy.layers.ipsec import AH
 
-from framework import VppTestCase, VppTestRunner
+from framework import VppTestRunner
+from template_ipsec import TemplateIpsec, IpsecTraTests, IpsecTunTests
+from template_ipsec import IpsecTcpTests
 
 
-class TestIpsecAh(VppTestCase):
+class TemplateIpsecAh(TemplateIpsec):
     """
     Basic test for IPSEC using AH transport and Tunnel mode
 
@@ -41,214 +41,123 @@ class TestIpsecAh(VppTestCase):
     Note : IPv6 is not covered
     """
 
-    remote_pg0_lb_addr = '1.1.1.1'
-    remote_pg1_lb_addr = '2.2.2.2'
-    payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+    encryption_type = AH
 
     @classmethod
     def setUpClass(cls):
-        super(TestIpsecAh, cls).setUpClass()
-        try:
-            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()
-            cls.logger.info(cls.vapi.ppcli("show int addr"))
-            cls.config_ah_tra()
-            cls.logger.info(cls.vapi.ppcli("show ipsec"))
-            cls.config_ah_tun()
-            cls.logger.info(cls.vapi.ppcli("show ipsec"))
-        except Exception:
-            super(TestIpsecAh, cls).tearDownClass()
-            raise
+        super(TemplateIpsecAh, cls).setUpClass()
+        cls.tun_if = cls.pg0
+        cls.tra_if = cls.pg2
+        cls.logger.info(cls.vapi.ppcli("show int addr"))
+        cls.config_ah_tra()
+        cls.logger.info(cls.vapi.ppcli("show ipsec"))
+        cls.config_ah_tun()
+        cls.logger.info(cls.vapi.ppcli("show ipsec"))
+        src4 = socket.inet_pton(socket.AF_INET, cls.remote_tun_if_host)
+        cls.vapi.ip_add_del_route(src4, 32, cls.tun_if.remote_ip4n)
 
     @classmethod
     def config_ah_tun(cls):
-        spd_id = 1
-        remote_sa_id = 10
-        local_sa_id = 20
-        remote_tun_spi = 1001
-        local_tun_spi = 1000
-        src4 = socket.inet_pton(socket.AF_INET, cls.remote_pg0_lb_addr)
-        cls.vapi.ip_add_del_route(src4, 32, cls.pg0.remote_ip4n)
-        dst4 = socket.inet_pton(socket.AF_INET, cls.remote_pg1_lb_addr)
-        cls.vapi.ip_add_del_route(dst4, 32, cls.pg1.remote_ip4n)
-        cls.vapi.ipsec_sad_add_del_entry(remote_sa_id, remote_tun_spi,
-                                         cls.pg0.local_ip4n,
-                                         cls.pg0.remote_ip4n,
-                                         integrity_key_length=20)
-        cls.vapi.ipsec_sad_add_del_entry(local_sa_id, local_tun_spi,
-                                         cls.pg0.remote_ip4n,
-                                         cls.pg0.local_ip4n,
-                                         integrity_key_length=20)
-        cls.vapi.ipsec_spd_add_del(spd_id)
-        cls.vapi.ipsec_interface_add_del_spd(spd_id, cls.pg0.sw_if_index)
+        cls.vapi.ipsec_sad_add_del_entry(cls.scapy_tun_sa_id,
+                                         cls.scapy_tun_spi,
+                                         cls.auth_algo_vpp_id, cls.auth_key,
+                                         cls.crypt_algo_vpp_id,
+                                         cls.crypt_key, cls.vpp_ah_protocol,
+                                         cls.tun_if.local_ip4n,
+                                         cls.tun_if.remote_ip4n)
+        cls.vapi.ipsec_sad_add_del_entry(cls.vpp_tun_sa_id,
+                                         cls.vpp_tun_spi,
+                                         cls.auth_algo_vpp_id, cls.auth_key,
+                                         cls.crypt_algo_vpp_id,
+                                         cls.crypt_key, cls.vpp_ah_protocol,
+                                         cls.tun_if.remote_ip4n,
+                                         cls.tun_if.local_ip4n)
+        cls.vapi.ipsec_spd_add_del(cls.tun_spd_id)
+        cls.vapi.ipsec_interface_add_del_spd(cls.tun_spd_id,
+                                             cls.tun_if.sw_if_index)
         l_startaddr = r_startaddr = socket.inet_pton(socket.AF_INET, "0.0.0.0")
         l_stopaddr = r_stopaddr = socket.inet_pton(socket.AF_INET,
                                                    "255.255.255.255")
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.vpp_tun_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr,
+                                         protocol=socket.IPPROTO_AH)
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.vpp_tun_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, is_outbound=0,
                                          protocol=socket.IPPROTO_AH)
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
-                                         protocol=socket.IPPROTO_AH,
-                                         is_outbound=0)
         l_startaddr = l_stopaddr = socket.inet_pton(socket.AF_INET,
-                                                    cls.remote_pg0_lb_addr)
-        r_startaddr = r_stopaddr = socket.inet_pton(socket.AF_INET,
-                                                    cls.remote_pg1_lb_addr)
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
-                                         priority=10, policy=3,
-                                         is_outbound=0, sa_id=local_sa_id)
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, r_startaddr, r_stopaddr,
-                                         l_startaddr, l_stopaddr, priority=10,
-                                         policy=3, sa_id=remote_sa_id)
+                                                    cls.remote_tun_if_host)
+        r_startaddr = r_stopaddr = cls.pg1.remote_ip4n
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.vpp_tun_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, priority=10, policy=3,
+                                         is_outbound=0)
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.scapy_tun_sa_id,
+                                         r_startaddr, r_stopaddr, l_startaddr,
+                                         l_stopaddr, priority=10, policy=3)
+        r_startaddr = r_stopaddr = cls.pg0.local_ip4n
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.vpp_tun_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, priority=20, policy=3,
+                                         is_outbound=0)
+        cls.vapi.ipsec_spd_add_del_entry(cls.tun_spd_id, cls.scapy_tun_sa_id,
+                                         r_startaddr, r_stopaddr, l_startaddr,
+                                         l_stopaddr, priority=20, policy=3)
 
     @classmethod
     def config_ah_tra(cls):
-        spd_id = 2
-        remote_sa_id = 30
-        local_sa_id = 40
-        remote_tra_spi = 2001
-        local_tra_spi = 2000
-        cls.vapi.ipsec_sad_add_del_entry(remote_sa_id, remote_tra_spi,
-                                         integrity_key_length=20, is_tunnel=0)
-        cls.vapi.ipsec_sad_add_del_entry(local_sa_id, local_tra_spi,
-                                         integrity_key_length=20, is_tunnel=0)
-        cls.vapi.ipsec_spd_add_del(spd_id)
-        cls.vapi.ipsec_interface_add_del_spd(spd_id, cls.pg2.sw_if_index)
+        cls.vapi.ipsec_sad_add_del_entry(cls.scapy_tra_sa_id,
+                                         cls.scapy_tra_spi,
+                                         cls.auth_algo_vpp_id, cls.auth_key,
+                                         cls.crypt_algo_vpp_id,
+                                         cls.crypt_key, cls.vpp_ah_protocol,
+                                         is_tunnel=0)
+        cls.vapi.ipsec_sad_add_del_entry(cls.vpp_tra_sa_id,
+                                         cls.vpp_tra_spi,
+                                         cls.auth_algo_vpp_id, cls.auth_key,
+                                         cls.crypt_algo_vpp_id,
+                                         cls.crypt_key, cls.vpp_ah_protocol,
+                                         is_tunnel=0)
+        cls.vapi.ipsec_spd_add_del(cls.tra_spd_id)
+        cls.vapi.ipsec_interface_add_del_spd(cls.tra_spd_id,
+                                             cls.tra_if.sw_if_index)
         l_startaddr = r_startaddr = socket.inet_pton(socket.AF_INET, "0.0.0.0")
         l_stopaddr = r_stopaddr = socket.inet_pton(socket.AF_INET,
                                                    "255.255.255.255")
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
+        cls.vapi.ipsec_spd_add_del_entry(cls.tra_spd_id, cls.vpp_tra_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr,
                                          protocol=socket.IPPROTO_AH)
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
-                                         protocol=socket.IPPROTO_AH,
+        cls.vapi.ipsec_spd_add_del_entry(cls.tra_spd_id, cls.scapy_tra_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, is_outbound=0,
+                                         protocol=socket.IPPROTO_AH)
+        l_startaddr = l_stopaddr = cls.tra_if.local_ip4n
+        r_startaddr = r_stopaddr = cls.tra_if.remote_ip4n
+        cls.vapi.ipsec_spd_add_del_entry(cls.tra_spd_id, cls.vpp_tra_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, priority=10, policy=3,
                                          is_outbound=0)
-        l_startaddr = l_stopaddr = cls.pg2.local_ip4n
-        r_startaddr = r_stopaddr = cls.pg2.remote_ip4n
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr,
-                                         priority=10, policy=3,
-                                         is_outbound=0, sa_id=local_sa_id)
-        cls.vapi.ipsec_spd_add_del_entry(spd_id, l_startaddr, l_stopaddr,
-                                         r_startaddr, r_stopaddr, priority=10,
-                                         policy=3, sa_id=remote_sa_id)
-
-    def configure_scapy_sa_tun(self):
-        remote_tun_sa = SecurityAssociation(AH, spi=0x000003e8,
-                                            auth_algo='HMAC-SHA1-96',
-                                            auth_key='C91KUR9GYMm5GfkEvNjX',
-                                            tunnel_header=IP(
-                                                src=self.pg0.remote_ip4,
-                                                dst=self.pg0.local_ip4))
-        local_tun_sa = SecurityAssociation(AH, spi=0x000003e9,
-                                           auth_algo='HMAC-SHA1-96',
-                                           auth_key='C91KUR9GYMm5GfkEvNjX',
-                                           tunnel_header=IP(
-                                               dst=self.pg0.remote_ip4,
-                                               src=self.pg0.local_ip4))
-        return local_tun_sa, remote_tun_sa
-
-    def configure_scapy_sa_tra(self):
-        remote_tra_sa = SecurityAssociation(AH, spi=0x000007d0,
-                                            auth_algo='HMAC-SHA1-96',
-                                            auth_key='C91KUR9GYMm5GfkEvNjX')
-        local_tra_sa = SecurityAssociation(AH, spi=0x000007d1,
-                                           auth_algo='HMAC-SHA1-96',
-                                           auth_key='C91KUR9GYMm5GfkEvNjX')
-        return local_tra_sa, remote_tra_sa
+        cls.vapi.ipsec_spd_add_del_entry(cls.tra_spd_id, cls.scapy_tra_sa_id,
+                                         l_startaddr, l_stopaddr, r_startaddr,
+                                         r_stopaddr, priority=10,
+                                         policy=3)
 
     def tearDown(self):
-        super(TestIpsecAh, self).tearDown()
+        super(TemplateIpsecAh, 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)
-                ] * 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
-                ] * count
-
-    def test_ipsec_ah_tra_basic(self, count=1):
-        """ ipsec ah v4 transport basic test """
-        try:
-            local_tra_sa, remote_tra_sa = self.configure_scapy_sa_tra()
-            send_pkts = self.gen_encrypt_pkts(remote_tra_sa, self.pg2,
-                                              src=self.pg2.remote_ip4,
-                                              dst=self.pg2.local_ip4,
-                                              count=count)
-            recv_pkts = self.send_and_expect(self.pg2, send_pkts, self.pg2,
-                                             count=count)
-            # ESP TRA VPP encryption/decryption verification
-            for Pkts in recv_pkts:
-                Pkts[AH].padding = Pkts[AH].icv[12:]
-                Pkts[AH].icv = Pkts[AH].icv[:12]
-                local_tra_sa.decrypt(Pkts[IP])
-        finally:
-            self.logger.info(self.vapi.ppcli("show error"))
-            self.logger.info(self.vapi.ppcli("show ipsec"))
-
-    def test_ipsec_ah_tra_burst(self):
-        """ ipsec ah v4 transport burst test """
-        try:
-            self.test_ipsec_ah_tra_basic(count=257)
-        finally:
-            self.logger.info(self.vapi.ppcli("show error"))
-            self.logger.info(self.vapi.ppcli("show ipsec"))
-
-    def test_ipsec_ah_tun_basic(self, count=1):
-        """ ipsec ah 4o4 tunnel basic test """
-        try:
-            local_tun_sa, remote_tun_sa = self.configure_scapy_sa_tun()
-            send_pkts = self.gen_encrypt_pkts(remote_tun_sa, self.pg0,
-                                              src=self.remote_pg0_lb_addr,
-                                              dst=self.remote_pg1_lb_addr,
-                                              count=count)
-            recv_pkts = self.send_and_expect(self.pg0, send_pkts, self.pg1,
-                                             count=count)
-            # ESP TUN VPP decryption verification
-            for recv_pkt in recv_pkts:
-                self.assert_equal(recv_pkt[IP].src, self.remote_pg0_lb_addr)
-                self.assert_equal(recv_pkt[IP].dst, self.remote_pg1_lb_addr)
-            send_pkts = self.gen_pkts(self.pg1, src=self.remote_pg1_lb_addr,
-                                      dst=self.remote_pg0_lb_addr,
-                                      count=count)
-            recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.pg0,
-                                             count=count)
-            # ESP TUN VPP encryption verification
-            for recv_pkt in recv_pkts:
-                decrypt_pkt = local_tun_sa.decrypt(recv_pkt[IP])
-                decrypt_pkt = IP(decrypt_pkt[Raw].load)
-                self.assert_equal(decrypt_pkt.src, self.remote_pg1_lb_addr)
-                self.assert_equal(decrypt_pkt.dst, self.remote_pg0_lb_addr)
-        finally:
-            self.logger.info(self.vapi.ppcli("show error"))
-            self.logger.info(self.vapi.ppcli("show ipsec"))
-
-    def test_ipsec_ah_tun_burst(self):
-        """ ipsec ah 4o4 tunnel burst test """
-        try:
-            self.test_ipsec_ah_tun_basic(count=257)
-        finally:
-            self.logger.info(self.vapi.ppcli("show error"))
-            self.logger.info(self.vapi.ppcli("show ipsec"))
+
+class TestIpsecAh1(TemplateIpsecAh, IpsecTraTests, IpsecTunTests):
+    """ Ipsec AH - TUN & TRA tests """
+    pass
+
+
+class TestIpsecAh2(TemplateIpsecAh, IpsecTcpTests):
+    """ Ipsec AH - TCP tests """
+    pass
 
 
 if __name__ == '__main__':