1 files changed, 325 insertions, 0 deletions
diff --git a/test/test_ipsec_ah.py b/test/test_ipsec_ah.py
new file mode 100644
index 00000000000..6e732418dbf
--- /dev/null
+++ b/test/test_ipsec_ah.py
@@ -0,0 +1,325 @@
+import socket
+
+from scapy.layers.inet import IP, ICMP
+from scapy.layers.l2 import Ether
+from scapy.layers.ipsec import *
+
+from framework import VppTestCase
+from vpp_ip_route import VppIpRoute
+
+from util import ppp
+
+
+class TestIpsecAh(VppTestCase):
+    """
+    Basic test for IPSEC using AH transport and Tunnel mode
+
+    Below 4 cases are covered as part of this test
+    1) ipsec ah v4 transport basic test  - IPv4 Transport mode
+     scenario using HMAC-SHA1-96 intergrity algo
+    2) ipsec ah v4 transport burst test
+     Above test for 257 pkts
+    3) ipsec ah 4o4 tunnel basic test    - IPv4 Tunnel mode
+     scenario using HMAC-SHA1-96 intergrity algo
+    4) ipsec ah 4o4 tunnel burst test
+     Above test for 257 pkts
+
+    TRANSPORT MODE:
+
+     ---   encrypt   ---
+    |pg2| <-------> |VPP|
+     ---   decrypt   ---
+
+    TUNNEL MODE:
+
+     ---   encrypt   ---   plain   ---
+    |pg0| ------->  |VPP| ------> |pg1|
+     ---             ---           ---
+
+     ---   decrypt   ---   plain   ---
+    |pg0| <-------  |VPP| <------ |pg1|
+     ---             ---           ---
+
+    Note : IPv6 is not covered
+    """
+
+    remote_pg0_lb_addr = '1.1.1.1'
+    remote_pg1_lb_addr = '2.2.2.2'
+
+    @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.configAhTra()
+            cls.logger.info(cls.vapi.ppcli("show ipsec"))
+            cls.configAhTun()
+            cls.logger.info(cls.vapi.ppcli("show ipsec"))
+        except Exception:
+            super(TestIpsecAh, cls).tearDownClass()
+            raise
+
+    @classmethod
+    def configAhTun(cls):
+        try:
+            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)
+            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,
+                protocol=51)
+            cls.vapi.ipsec_spd_add_del_entry(
+                spd_id,
+                l_startaddr,
+                l_stopaddr,
+                r_startaddr,
+                r_stopaddr,
+                protocol=51,
+                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)
+        except Exception:
+            raise
+
+    @classmethod
+    def configAhTra(cls):
+        try:
+            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)
+            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,
+                protocol=51)
+            cls.vapi.ipsec_spd_add_del_entry(
+                spd_id,
+                l_startaddr,
+                l_stopaddr,
+                r_startaddr,
+                r_stopaddr,
+                protocol=51,
+                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)
+        except Exception:
+            raise
+
+    def configScapySA(self, is_tun=False):
+        if is_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))
+            self.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))
+        else:
+            self.remote_tra_sa = SecurityAssociation(
+                AH, spi=0x000007d0, auth_algo='HMAC-SHA1-96',
+                auth_key='C91KUR9GYMm5GfkEvNjX')
+            self.local_tra_sa = SecurityAssociation(
+                AH, spi=0x000007d1, auth_algo='HMAC-SHA1-96',
+                auth_key='C91KUR9GYMm5GfkEvNjX')
+
+    def tearDown(self):
+        super(TestIpsecAh, 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() /
+                "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX")
+                ] * 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() /
+                "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+                ] * count
+
+    def test_ipsec_ah_tra_basic(self, count=1):
+        """ ipsec ah v4 transport basic test """
+        try:
+            self.configScapySA()
+            send_pkts = self.gen_encrypt_pkts(
+                self.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]
+                decrypt_pkt = self.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:
+            self.configScapySA(is_tun=True)
+            send_pkts = self.gen_encrypt_pkts(
+                self.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:
+                recv_pkt[IP] = recv_pkt[IP] / IP(recv_pkt[AH].icv[12:])
+                recv_pkt[AH].icv = recv_pkt[AH].icv[:12]
+                decrypt_pkt = self.local_tun_sa.decrypt(recv_pkt[IP])
+                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"))
+
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)