| Klement Sekera | 31da2e3 | 2018-06-24 22:49:55 +0200 | [diff] [blame] | 1 | import unittest |
| 2 | |
| 3 | from scapy.layers.inet import IP, ICMP, TCP |
| 4 | from scapy.layers.ipsec import SecurityAssociation |
| 5 | from scapy.layers.l2 import Ether, Raw |
| 6 | |
| 7 | from framework import VppTestCase, VppTestRunner |
| 8 | from util import ppp |
| 9 | |
| 10 | |
| 11 | class TemplateIpsec(VppTestCase): |
| 12 | """ |
| 13 | TRANSPORT MODE: |
| 14 | |
| 15 | ------ encrypt --- |
| 16 | |tra_if| <-------> |VPP| |
| 17 | ------ decrypt --- |
| 18 | |
| 19 | TUNNEL MODE: |
| 20 | |
| 21 | ------ encrypt --- plain --- |
| 22 | |tun_if| <------- |VPP| <------ |pg1| |
| 23 | ------ --- --- |
| 24 | |
| 25 | ------ decrypt --- plain --- |
| 26 | |tun_if| -------> |VPP| ------> |pg1| |
| 27 | ------ --- --- |
| 28 | """ |
| 29 | |
| 30 | remote_tun_if_host = '1.1.1.1' |
| 31 | payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" |
| 32 | |
| 33 | tun_spd_id = 1 |
| 34 | scapy_tun_sa_id = 10 |
| 35 | scapy_tun_spi = 1001 |
| 36 | vpp_tun_sa_id = 20 |
| 37 | vpp_tun_spi = 1000 |
| 38 | |
| 39 | tra_spd_id = 2 |
| 40 | scapy_tra_sa_id = 30 |
| 41 | scapy_tra_spi = 2001 |
| 42 | vpp_tra_sa_id = 40 |
| 43 | vpp_tra_spi = 2000 |
| 44 | |
| 45 | vpp_esp_protocol = 1 |
| 46 | vpp_ah_protocol = 0 |
| 47 | |
| 48 | auth_algo_vpp_id = 2 # internal VPP enum value for SHA1_96 |
| 49 | auth_algo = 'HMAC-SHA1-96' # scapy name |
| 50 | auth_key = 'C91KUR9GYMm5GfkEvNjX' |
| 51 | |
| 52 | crypt_algo_vpp_id = 1 # internal VPP enum value for AES_CBC_128 |
| 53 | crypt_algo = 'AES-CBC' # scapy name |
| 54 | crypt_key = 'JPjyOWBeVEQiMe7h' |
| 55 | |
| 56 | @classmethod |
| 57 | def setUpClass(cls): |
| 58 | super(TemplateIpsec, cls).setUpClass() |
| 59 | cls.create_pg_interfaces(range(3)) |
| 60 | cls.interfaces = list(cls.pg_interfaces) |
| 61 | for i in cls.interfaces: |
| 62 | i.admin_up() |
| 63 | i.config_ip4() |
| 64 | i.resolve_arp() |
| 65 | |
| 66 | def tearDown(self): |
| 67 | super(TemplateIpsec, self).tearDown() |
| 68 | if not self.vpp_dead: |
| 69 | self.vapi.cli("show hardware") |
| 70 | |
| 71 | def send_and_expect(self, input, pkts, output, count=1): |
| 72 | input.add_stream(pkts) |
| 73 | self.pg_enable_capture(self.pg_interfaces) |
| 74 | self.pg_start() |
| 75 | rx = output.get_capture(count) |
| 76 | return rx |
| 77 | |
| 78 | def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1): |
| 79 | return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / |
| 80 | sa.encrypt(IP(src=src, dst=dst) / ICMP() / self.payload) |
| 81 | for i in range(count)] |
| 82 | |
| 83 | def gen_pkts(self, sw_intf, src, dst, count=1): |
| 84 | return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / |
| 85 | IP(src=src, dst=dst) / ICMP() / self.payload |
| 86 | for i in range(count)] |
| 87 | |
| 88 | def configure_sa_tun(self): |
| 89 | scapy_tun_sa = SecurityAssociation(self.encryption_type, |
| 90 | spi=self.vpp_tun_spi, |
| 91 | crypt_algo=self.crypt_algo, |
| 92 | crypt_key=self.crypt_key, |
| 93 | auth_algo=self.auth_algo, |
| 94 | auth_key=self.auth_key, |
| 95 | tunnel_header=IP( |
| 96 | src=self.tun_if.remote_ip4, |
| 97 | dst=self.tun_if.local_ip4)) |
| 98 | vpp_tun_sa = SecurityAssociation(self.encryption_type, |
| 99 | spi=self.scapy_tun_spi, |
| 100 | crypt_algo=self.crypt_algo, |
| 101 | crypt_key=self.crypt_key, |
| 102 | auth_algo=self.auth_algo, |
| 103 | auth_key=self.auth_key, |
| 104 | tunnel_header=IP( |
| 105 | dst=self.tun_if.remote_ip4, |
| 106 | src=self.tun_if.local_ip4)) |
| 107 | return vpp_tun_sa, scapy_tun_sa |
| 108 | |
| 109 | def configure_sa_tra(self): |
| 110 | scapy_tra_sa = SecurityAssociation(self.encryption_type, |
| 111 | spi=self.vpp_tra_spi, |
| 112 | crypt_algo=self.crypt_algo, |
| 113 | crypt_key=self.crypt_key, |
| 114 | auth_algo=self.auth_algo, |
| 115 | auth_key=self.auth_key) |
| 116 | vpp_tra_sa = SecurityAssociation(self.encryption_type, |
| 117 | spi=self.scapy_tra_spi, |
| 118 | crypt_algo=self.crypt_algo, |
| 119 | crypt_key=self.crypt_key, |
| 120 | auth_algo=self.auth_algo, |
| 121 | auth_key=self.auth_key) |
| 122 | return vpp_tra_sa, scapy_tra_sa |
| 123 | |
| 124 | |
| 125 | class IpsecTcpTests(object): |
| 126 | def test_tcp_checksum(self): |
| 127 | """ verify checksum correctness for vpp generated packets """ |
| 128 | self.vapi.cli("test http server") |
| 129 | vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun() |
| 130 | send = (Ether(src=self.tun_if.remote_mac, dst=self.tun_if.local_mac) / |
| 131 | scapy_tun_sa.encrypt(IP(src=self.remote_tun_if_host, |
| 132 | dst=self.tun_if.local_ip4) / |
| 133 | TCP(flags='S', dport=80))) |
| 134 | self.logger.debug(ppp("Sending packet:", send)) |
| 135 | recv = self.send_and_expect(self.tun_if, [send], self.tun_if, 1) |
| 136 | recv = recv[0] |
| 137 | decrypted = vpp_tun_sa.decrypt(recv[IP]) |
| 138 | self.assert_packet_checksums_valid(decrypted) |
| 139 | |
| 140 | |
| 141 | class IpsecTraTests(object): |
| 142 | def test_tra_basic(self, count=1): |
| 143 | """ ipsec v4 transport basic test """ |
| 144 | try: |
| 145 | vpp_tra_sa, scapy_tra_sa = self.configure_sa_tra() |
| 146 | send_pkts = self.gen_encrypt_pkts(scapy_tra_sa, self.tra_if, |
| 147 | src=self.tra_if.remote_ip4, |
| 148 | dst=self.tra_if.local_ip4, |
| 149 | count=count) |
| 150 | recv_pkts = self.send_and_expect(self.tra_if, send_pkts, |
| 151 | self.tra_if, count=count) |
| 152 | for p in recv_pkts: |
| 153 | decrypted = vpp_tra_sa.decrypt(p[IP]) |
| 154 | self.assert_packet_checksums_valid(decrypted) |
| 155 | finally: |
| 156 | self.logger.info(self.vapi.ppcli("show error")) |
| 157 | self.logger.info(self.vapi.ppcli("show ipsec")) |
| 158 | |
| 159 | def test_tra_burst(self): |
| 160 | """ ipsec v4 transport burst test """ |
| 161 | try: |
| 162 | self.test_tra_basic(count=257) |
| 163 | finally: |
| 164 | self.logger.info(self.vapi.ppcli("show error")) |
| 165 | self.logger.info(self.vapi.ppcli("show ipsec")) |
| 166 | |
| 167 | |
| 168 | class IpsecTunTests(object): |
| 169 | def test_tun_basic(self, count=1): |
| 170 | """ ipsec 4o4 tunnel basic test """ |
| 171 | try: |
| 172 | vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun() |
| 173 | send_pkts = self.gen_encrypt_pkts(scapy_tun_sa, self.tun_if, |
| 174 | src=self.remote_tun_if_host, |
| 175 | dst=self.pg1.remote_ip4, |
| 176 | count=count) |
| 177 | recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1, |
| 178 | count=count) |
| 179 | for recv_pkt in recv_pkts: |
| 180 | self.assert_equal(recv_pkt[IP].src, self.remote_tun_if_host) |
| 181 | self.assert_equal(recv_pkt[IP].dst, self.pg1.remote_ip4) |
| 182 | self.assert_packet_checksums_valid(recv_pkt) |
| 183 | send_pkts = self.gen_pkts(self.pg1, src=self.pg1.remote_ip4, |
| 184 | dst=self.remote_tun_if_host, count=count) |
| 185 | recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if, |
| 186 | count=count) |
| 187 | for recv_pkt in recv_pkts: |
| 188 | decrypt_pkt = vpp_tun_sa.decrypt(recv_pkt[IP]) |
| 189 | if not decrypt_pkt.haslayer(IP): |
| 190 | decrypt_pkt = IP(decrypt_pkt[Raw].load) |
| 191 | self.assert_equal(decrypt_pkt.src, self.pg1.remote_ip4) |
| 192 | self.assert_equal(decrypt_pkt.dst, self.remote_tun_if_host) |
| 193 | self.assert_packet_checksums_valid(decrypt_pkt) |
| 194 | finally: |
| 195 | self.logger.info(self.vapi.ppcli("show error")) |
| 196 | self.logger.info(self.vapi.ppcli("show ipsec")) |
| 197 | |
| 198 | def test_tun_burst(self): |
| 199 | """ ipsec 4o4 tunnel burst test """ |
| 200 | try: |
| 201 | self.test_tun_basic(count=257) |
| 202 | finally: |
| 203 | self.logger.info(self.vapi.ppcli("show error")) |
| 204 | self.logger.info(self.vapi.ppcli("show ipsec")) |
| 205 | |
| 206 | |
| 207 | if __name__ == '__main__': |
| 208 | unittest.main(testRunner=VppTestRunner) |