summaryrefslogtreecommitdiffstats
path: root/test/template_ipsec.py
blob: 7888a6788abfdcdc29179cabb8ee0d48148e1e41 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
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
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
import unittest
import socket

from scapy.layers.inet import IP, ICMP, TCP
from scapy.layers.ipsec import SecurityAssociation
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet6 import IPv6, ICMPv6EchoRequest

from framework import VppTestCase, VppTestRunner
from util import ppp
from vpp_papi import VppEnum


class IPsecIPv4Params(object):

    addr_type = socket.AF_INET
    addr_any = "0.0.0.0"
    addr_bcast = "255.255.255.255"
    addr_len = 32
    is_ipv6 = 0

    def __init__(self):
        self.remote_tun_if_host = '1.1.1.1'

        self.scapy_tun_sa_id = 10
        self.scapy_tun_spi = 1001
        self.vpp_tun_sa_id = 20
        self.vpp_tun_spi = 1000

        self.scapy_tra_sa_id = 30
        self.scapy_tra_spi = 2001
        self.vpp_tra_sa_id = 40
        self.vpp_tra_spi = 2000

        self.auth_algo_vpp_id = (VppEnum.vl_api_ipsec_integ_alg_t.
                                 IPSEC_API_INTEG_ALG_SHA1_96)
        self.auth_algo = 'HMAC-SHA1-96'  # scapy name
        self.auth_key = 'C91KUR9GYMm5GfkEvNjX'

        self.crypt_algo_vpp_id = (VppEnum.vl_api_ipsec_crypto_alg_t.
                                  IPSEC_API_CRYPTO_ALG_AES_CBC_128)
        self.crypt_algo = 'AES-CBC'  # scapy name
        self.crypt_key = 'JPjyOWBeVEQiMe7h'


class IPsecIPv6Params(object):

    addr_type = socket.AF_INET6
    addr_any = "0::0"
    addr_bcast = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
    addr_len = 128
    is_ipv6 = 1

    def __init__(self):
        self.remote_tun_if_host = '1111:1111:1111:1111:1111:1111:1111:1111'

        self.scapy_tun_sa_id = 50
        self.scapy_tun_spi = 3001
        self.vpp_tun_sa_id = 60
        self.vpp_tun_spi = 3000

        self.scapy_tra_sa_id = 70
        self.scapy_tra_spi = 4001
        self.vpp_tra_sa_id = 80
        self.vpp_tra_spi = 4000

        self.auth_algo_vpp_id = (VppEnum.vl_api_ipsec_integ_alg_t.
                                 IPSEC_API_INTEG_ALG_SHA_256_128)
        self.auth_algo = 'SHA2-256-128'  # scapy name
        self.auth_key = 'C91KUR9GYMm5GfkEvNjX'

        self.crypt_algo_vpp_id = (VppEnum.vl_api_ipsec_crypto_alg_t.
                                  IPSEC_API_CRYPTO_ALG_AES_CBC_256)
        self.crypt_algo = 'AES-CBC'  # scapy name
        self.crypt_key = 'JPjyOWBeVEQiMe7hJPjyOWBeVEQiMe7h'


class TemplateIpsec(VppTestCase):
    """
    TRANSPORT MODE:

     ------   encrypt   ---
    |tra_if| <-------> |VPP|
     ------   decrypt   ---

    TUNNEL MODE:

     ------   encrypt   ---   plain   ---
    |tun_if| <-------  |VPP| <------ |pg1|
     ------             ---           ---

     ------   decrypt   ---   plain   ---
    |tun_if| ------->  |VPP| ------> |pg1|
     ------             ---           ---
    """

    def ipsec_select_backend(self):
        """ empty method to be overloaded when necessary """
        pass

    def setUp(self):
        super(TemplateIpsec, self).setUp()

        self.ipv4_params = IPsecIPv4Params()
        self.ipv6_params = IPsecIPv6Params()
        self.params = {self.ipv4_params.addr_type: self.ipv4_params,
                       self.ipv6_params.addr_type: self.ipv6_params}

        self.payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"\
                       "XXXXXXXXXXXXXXXXXXXXX"

        self.tun_spd_id = 1
        self.tra_spd_id = 2

        self.vpp_esp_protocol = (VppEnum.vl_api_ipsec_proto_t.
                                 IPSEC_API_PROTO_ESP)
        self.vpp_ah_protocol = (VppEnum.vl_api_ipsec_proto_t.
                                IPSEC_API_PROTO_AH)

        self.create_pg_interfaces(range(3))
        self.interfaces = list(self.pg_interfaces)
        for i in self.interfaces:
            i.admin_up()
            i.config_ip4()
            i.resolve_arp()
            i.config_ip6()
            i.resolve_ndp()
        self.ipsec_select_backend()

    def tearDown(self):
        super(TemplateIpsec, self).tearDown()

        for i in self.interfaces:
            i.admin_down()
            i.unconfig_ip4()
            i.unconfig_ip6()

        if not self.vpp_dead:
            self.vapi.cli("show hardware")

    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_encrypt_pkts6(self, sa, sw_intf, src, dst, count=1):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                sa.encrypt(IPv6(src=src, dst=dst) /
                           ICMPv6EchoRequest(id=0, seq=1, data=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 gen_pkts6(self, sw_intf, src, dst, count=1):
        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
                IPv6(src=src, dst=dst) /
                ICMPv6EchoRequest(id=0, seq=1, data=self.payload)
                for i in range(count)]

    def configure_sa_tun(self, params):
        ip_class_by_addr_type = {socket.AF_INET: IP, socket.AF_INET6: IPv6}
        scapy_tun_sa = SecurityAssociation(
            self.encryption_type, spi=params.vpp_tun_spi,
            crypt_algo=params.crypt_algo, crypt_key=params.crypt_key,
            auth_algo=params.auth_algo, auth_key=params.auth_key,
            tunnel_header=ip_class_by_addr_type[params.addr_type](
                src=self.tun_if.remote_addr[params.addr_type],
                dst=self.tun_if.local_addr[params.addr_type]))
        vpp_tun_sa = SecurityAssociation(
            self.encryption_type, spi=params.scapy_tun_spi,
            crypt_algo=params.crypt_algo, crypt_key=params.crypt_key,
            auth_algo=params.auth_algo, auth_key=params.auth_key,
            tunnel_header=ip_class_by_addr_type[params.addr_type](
                dst=self.tun_if.remote_addr[params.addr_type],
                src=self.tun_if.local_addr[params.addr_type]))
        return vpp_tun_sa, scapy_tun_sa

    def configure_sa_tra(self, params):
        params.scapy_tra_sa = SecurityAssociation(self.encryption_type,
                                                  spi=params.vpp_tra_spi,
                                                  crypt_algo=params.crypt_algo,
                                                  crypt_key=params.crypt_key,
                                                  auth_algo=params.auth_algo,
                                                  auth_key=params.auth_key)
        params.vpp_tra_sa = SecurityAssociation(self.encryption_type,
                                                spi=params.scapy_tra_spi,
                                                crypt_algo=params.crypt_algo,
                                                crypt_key=params.crypt_key,
                                                auth_algo=params.auth_algo,
                                                auth_key=params.auth_key)


class IpsecTcpTests(object):
    def test_tcp_checksum(self):
        """ verify checksum correctness for vpp generated packets """
        self.vapi.cli("test http server")
        p = self.params[socket.AF_INET]
        vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun(p)
        send = (Ether(src=self.tun_if.remote_mac, dst=self.tun_if.local_mac) /
                scapy_tun_sa.encrypt(IP(src=p.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)
        recv = recv[0]
        decrypted = vpp_tun_sa.decrypt(recv[IP])
        self.assert_packet_checksums_valid(decrypted)


class IpsecTraTests(object):
    def test_tra_anti_replay(self, count=1):
        """ ipsec v4 transport anti-reply test """
        p = self.params[socket.AF_INET]

        # fire in a packet with seq number 1
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                         dst=self.tra_if.local_ip4) /
                                      ICMP(),
                                      seq_num=1))
        recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if)

        # now move the window over to 235
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                         dst=self.tra_if.local_ip4) /
                                      ICMP(),
                                      seq_num=235))
        recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if)

        # the window size is 64 packets
        # in window are still accepted
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                         dst=self.tra_if.local_ip4) /
                                      ICMP(),
                                      seq_num=172))
        recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if)

        # out of window are dropped
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                         dst=self.tra_if.local_ip4) /
                                      ICMP(),
                                      seq_num=17))
        self.send_and_assert_no_replies(self.tra_if, pkt * 17)

        self.assert_packet_counter_equal(
            '/err/%s/SA replayed packet' % self.tra4_decrypt_node_name, 17)

        # a packet that does not decrypt does not move the window forward
        bogus_sa = SecurityAssociation(self.encryption_type,
                                       p.vpp_tra_spi)
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               bogus_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                   dst=self.tra_if.local_ip4) /
                                ICMP(),
                                seq_num=350))
        self.send_and_assert_no_replies(self.tra_if, pkt * 17)

        self.assert_packet_counter_equal(
            '/err/%s/Integrity check failed' % self.tra4_decrypt_node_name, 17)

        # which we can determine since this packet is still in the window
        pkt = (Ether(src=self.tra_if.remote_mac,
                     dst=self.tra_if.local_mac) /
               p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4,
                                         dst=self.tra_if.local_ip4) /
                                      ICMP(),
                                      seq_num=234))
        self.send_and_expect(self.tra_if, [pkt], self.tra_if)

        # move the security-associations seq number on to the last we used
        p.scapy_tra_sa.seq_num = 351
        p.vpp_tra_sa.seq_num = 351

    def test_tra_basic(self, count=1):
        """ ipsec v4 transport basic test """
        self.vapi.cli("clear errors")
        try:
            p = self.params[socket.AF_INET]
            send_pkts = self.gen_encrypt_pkts(p.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)
            for rx in recv_pkts:
                try:
                    decrypted = p.vpp_tra_sa.decrypt(rx[IP])
                    self.assert_packet_checksums_valid(decrypted)
                except:
                    self.logger.debug(ppp("Unexpected packet:", rx))
                    raise
        finally:
            self.logger.info(self.vapi.ppcli("show error"))
            self.logger.info(self.vapi.ppcli("show ipsec"))

        self.assert_packet_counter_equal(self.tra4_encrypt_node_name, count)
        self.assert_packet_counter_equal(self.tra4_decrypt_node_name, count)

    def test_tra_burst(self):
        """ ipsec v4 transport burst test """
        self.test_tra_basic(count=257)

    def test_tra_basic6(self, count=1):
        """ ipsec v6 transport basic test """
        self.vapi.cli("clear errors")
        try:
            p = self.params[socket.AF_INET6]
            send_pkts = self.gen_encrypt_pkts6(p.scapy_tra_sa, self.tra_if,
                                               src=self.tra_if.remote_ip6,
                                               dst=self.tra_if.local_ip6,
                                               count=count)
            recv_pkts = self.send_and_expect(self.tra_if, send_pkts,
                                             self.tra_if)
            for rx in recv_pkts:
                try:
                    decrypted = p.vpp_tra_sa.decrypt(rx[IPv6])
                    self.assert_packet_checksums_valid(decrypted)
                except:
                    self.logger.debug(ppp("Unexpected packet:", rx))
                    raise
        finally:
            self.logger.info(self.vapi.ppcli("show error"))
            self.logger.info(self.vapi.ppcli("show ipsec"))

        self.assert_packet_counter_equal(self.tra6_encrypt_node_name, count)
        self.assert_packet_counter_equal(self.tra6_decrypt_node_name, count)

    def test_tra_burst6(self):
        """ ipsec v6 transport burst test """
        self.test_tra_basic6(count=257)


class IpsecTun4Tests(object):
    def test_tun_basic44(self, count=1):
        """ ipsec 4o4 tunnel basic test """
        self.vapi.cli("clear errors")
        try:
            p = self.params[socket.AF_INET]
            vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun(p)
            send_pkts = self.gen_encrypt_pkts(scapy_tun_sa, self.tun_if,
                                              src=p.remote_tun_if_host,
                                              dst=self.pg1.remote_ip4,
                                              count=count)
            recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1)
            for recv_pkt in recv_pkts:
                self.assert_equal(recv_pkt[IP].src, p.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=p.remote_tun_if_host, count=count)
            recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if)
            for recv_pkt in recv_pkts:
                try:
                    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, p.remote_tun_if_host)
                    self.assert_packet_checksums_valid(decrypt_pkt)
                except:
                    self.logger.debug(ppp("Unexpected packet:", recv_pkt))
                    try:
                        self.logger.debug(
                            ppp("Decrypted packet:", decrypt_pkt))
                    except:
                        pass
                    raise
        finally:
            self.logger.info(self.vapi.ppcli("show error"))
            self.logger.info(self.vapi.ppcli("show ipsec"))

        self.assert_packet_counter_equal(self.tun4_encrypt_node_name, count)
        self.assert_packet_counter_equal(self.tun4_decrypt_node_name, count)

    def test_tun_burst44(self):
        """ ipsec 4o4 tunnel burst test """
        self.test_tun_basic44(count=257)


class IpsecTun6Tests(object):
    def test_tun_basic66(self, count=1):
        """ ipsec 6o6 tunnel basic test """
        self.vapi.cli("clear errors")
        try:
            p = self.params[socket.AF_INET6]
            vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun(p)
            send_pkts = self.gen_encrypt_pkts6(scapy_tun_sa, self.tun_if,
                                               src=p.remote_tun_if_host,
                                               dst=self.pg1.remote_ip6,
                                               count=count)
            recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1)
            for recv_pkt in recv_pkts:
                self.assert_equal(recv_pkt[IPv6].src, p.remote_tun_if_host)
                self.assert_equal(recv_pkt[IPv6].dst, self.pg1.remote_ip6)
                self.assert_packet_checksums_valid(recv_pkt)
            send_pkts = self.gen_pkts6(self.pg1, src=self.pg1.remote_ip6,
                                       dst=p.remote_tun_if_host,
                                       count=count)
            recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if)
            for recv_pkt in recv_pkts:
                try:
                    decrypt_pkt = vpp_tun_sa.decrypt(recv_pkt[IPv6])
                    if not decrypt_pkt.haslayer(IPv6):
                        decrypt_pkt = IPv6(decrypt_pkt[Raw].load)
                    self.assert_equal(decrypt_pkt.src, self.pg1.remote_ip6)
                    self.assert_equal(decrypt_pkt.dst, p.remote_tun_if_host)
                    self.assert_packet_checksums_valid(decrypt_pkt)
                except:
                    self.logger.debug(ppp("Unexpected packet:", recv_pkt))
                    try:
                        self.logger.debug(
                            ppp("Decrypted packet:", decrypt_pkt))
                    except:
                        pass
                    raise
        finally:
            self.logger.info(self.vapi.ppcli("show error"))
            self.logger.info(self.vapi.ppcli("show ipsec"))

        self.assert_packet_counter_equal(self.tun6_encrypt_node_name, count)
        self.assert_packet_counter_equal(self.tun6_decrypt_node_name, count)

    def test_tun_burst66(self):
        """ ipsec 6o6 tunnel burst test """
        self.test_tun_basic66(count=257)


class IpsecTunTests(IpsecTun4Tests, IpsecTun6Tests):
    pass


if __name__ == '__main__':
    unittest.main(testRunner=VppTestRunner)