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
|
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
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
remote_tun_if_host = '1.1.1.1'
scapy_tun_sa_id = 10
scapy_tun_spi = 1001
vpp_tun_sa_id = 20
vpp_tun_spi = 1000
scapy_tra_sa_id = 30
scapy_tra_spi = 2001
vpp_tra_sa_id = 40
vpp_tra_spi = 2000
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'
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
remote_tun_if_host = '1111:1111:1111:1111:1111:1111:1111:1111'
scapy_tun_sa_id = 50
scapy_tun_spi = 3001
vpp_tun_sa_id = 60
vpp_tun_spi = 3000
scapy_tra_sa_id = 70
scapy_tra_spi = 4001
vpp_tra_sa_id = 80
vpp_tra_spi = 4000
auth_algo_vpp_id = 4 # internal VPP enum value for SHA_256_128
auth_algo = 'SHA2-256-128' # scapy name
auth_key = 'C91KUR9GYMm5GfkEvNjX'
crypt_algo_vpp_id = 3 # internal VPP enum value for AES_CBC_256
crypt_algo = 'AES-CBC' # scapy name
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|
------ --- ---
"""
ipv4_params = IPsecIPv4Params()
ipv6_params = IPsecIPv6Params()
params = {ipv4_params.addr_type: ipv4_params,
ipv6_params.addr_type: ipv6_params}
payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
tun_spd_id = 1
tra_spd_id = 2
vpp_esp_protocol = 1
vpp_ah_protocol = 0
@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()
i.config_ip6()
i.resolve_ndp()
def tearDown(self):
super(TemplateIpsec, self).tearDown()
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):
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)
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)
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")
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_basic(self, count=1):
""" ipsec v4 transport basic test """
try:
p = self.params[socket.AF_INET]
vpp_tra_sa, scapy_tra_sa = self.configure_sa_tra(p)
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)
for p in recv_pkts:
try:
decrypted = vpp_tra_sa.decrypt(p[IP])
self.assert_packet_checksums_valid(decrypted)
except:
self.logger.debug(ppp("Unexpected packet:", p))
raise
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 """
self.test_tra_basic(count=257)
def test_tra_basic6(self, count=1):
""" ipsec v6 transport basic test """
try:
p = self.params[socket.AF_INET6]
vpp_tra_sa, scapy_tra_sa = self.configure_sa_tra(p)
send_pkts = self.gen_encrypt_pkts6(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 p in recv_pkts:
try:
decrypted = vpp_tra_sa.decrypt(p[IPv6])
self.assert_packet_checksums_valid(decrypted)
except:
self.logger.debug(ppp("Unexpected packet:", p))
raise
finally:
self.logger.info(self.vapi.ppcli("show error"))
self.logger.info(self.vapi.ppcli("show ipsec"))
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 """
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"))
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 """
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"))
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)
|
