vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2022-05-10	tests: replace pycodestyle with black	Klement Sekera	1	-17/+25
2021-06-14	pg: A Tunnel mode variant of a pg interface	Neale Ranns	1	-0/+98
ef='#n67'>67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325
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)