a98346f664
Calculate IP/TCP/UDP checksums in software before adding authentication. Change-Id: I3e121cb00aeba667764f39ade8d62170f18f8b6b Signed-off-by: Klement Sekera <ksekera@cisco.com>
209 lines
8.4 KiB
Python
209 lines
8.4 KiB
Python
import unittest
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from scapy.layers.inet import IP, ICMP, TCP
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from scapy.layers.ipsec import SecurityAssociation
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from scapy.layers.l2 import Ether, Raw
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from framework import VppTestCase, VppTestRunner
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from util import ppp
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class TemplateIpsec(VppTestCase):
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"""
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TRANSPORT MODE:
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------ encrypt ---
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|tra_if| <-------> |VPP|
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------ decrypt ---
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TUNNEL MODE:
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------ encrypt --- plain ---
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|tun_if| <------- |VPP| <------ |pg1|
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------ --- ---
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------ decrypt --- plain ---
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|tun_if| -------> |VPP| ------> |pg1|
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------ --- ---
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"""
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remote_tun_if_host = '1.1.1.1'
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payload = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
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tun_spd_id = 1
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scapy_tun_sa_id = 10
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scapy_tun_spi = 1001
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vpp_tun_sa_id = 20
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vpp_tun_spi = 1000
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tra_spd_id = 2
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scapy_tra_sa_id = 30
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scapy_tra_spi = 2001
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vpp_tra_sa_id = 40
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vpp_tra_spi = 2000
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vpp_esp_protocol = 1
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vpp_ah_protocol = 0
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auth_algo_vpp_id = 2 # internal VPP enum value for SHA1_96
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auth_algo = 'HMAC-SHA1-96' # scapy name
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auth_key = 'C91KUR9GYMm5GfkEvNjX'
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crypt_algo_vpp_id = 1 # internal VPP enum value for AES_CBC_128
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crypt_algo = 'AES-CBC' # scapy name
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crypt_key = 'JPjyOWBeVEQiMe7h'
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@classmethod
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def setUpClass(cls):
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super(TemplateIpsec, cls).setUpClass()
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cls.create_pg_interfaces(range(3))
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cls.interfaces = list(cls.pg_interfaces)
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for i in cls.interfaces:
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i.admin_up()
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i.config_ip4()
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i.resolve_arp()
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def tearDown(self):
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super(TemplateIpsec, self).tearDown()
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if not self.vpp_dead:
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self.vapi.cli("show hardware")
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def send_and_expect(self, input, pkts, output, count=1):
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input.add_stream(pkts)
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self.pg_enable_capture(self.pg_interfaces)
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self.pg_start()
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rx = output.get_capture(count)
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return rx
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def gen_encrypt_pkts(self, sa, sw_intf, src, dst, count=1):
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return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
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sa.encrypt(IP(src=src, dst=dst) / ICMP() / self.payload)
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for i in range(count)]
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def gen_pkts(self, sw_intf, src, dst, count=1):
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return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
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IP(src=src, dst=dst) / ICMP() / self.payload
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for i in range(count)]
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def configure_sa_tun(self):
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scapy_tun_sa = SecurityAssociation(self.encryption_type,
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spi=self.vpp_tun_spi,
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crypt_algo=self.crypt_algo,
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crypt_key=self.crypt_key,
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auth_algo=self.auth_algo,
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auth_key=self.auth_key,
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tunnel_header=IP(
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src=self.tun_if.remote_ip4,
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dst=self.tun_if.local_ip4))
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vpp_tun_sa = SecurityAssociation(self.encryption_type,
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spi=self.scapy_tun_spi,
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crypt_algo=self.crypt_algo,
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crypt_key=self.crypt_key,
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auth_algo=self.auth_algo,
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auth_key=self.auth_key,
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tunnel_header=IP(
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dst=self.tun_if.remote_ip4,
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src=self.tun_if.local_ip4))
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return vpp_tun_sa, scapy_tun_sa
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def configure_sa_tra(self):
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scapy_tra_sa = SecurityAssociation(self.encryption_type,
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spi=self.vpp_tra_spi,
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crypt_algo=self.crypt_algo,
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crypt_key=self.crypt_key,
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auth_algo=self.auth_algo,
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auth_key=self.auth_key)
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vpp_tra_sa = SecurityAssociation(self.encryption_type,
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spi=self.scapy_tra_spi,
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crypt_algo=self.crypt_algo,
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crypt_key=self.crypt_key,
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auth_algo=self.auth_algo,
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auth_key=self.auth_key)
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return vpp_tra_sa, scapy_tra_sa
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class IpsecTcpTests(object):
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def test_tcp_checksum(self):
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""" verify checksum correctness for vpp generated packets """
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self.vapi.cli("test http server")
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vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun()
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send = (Ether(src=self.tun_if.remote_mac, dst=self.tun_if.local_mac) /
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scapy_tun_sa.encrypt(IP(src=self.remote_tun_if_host,
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dst=self.tun_if.local_ip4) /
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TCP(flags='S', dport=80)))
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self.logger.debug(ppp("Sending packet:", send))
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recv = self.send_and_expect(self.tun_if, [send], self.tun_if, 1)
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recv = recv[0]
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decrypted = vpp_tun_sa.decrypt(recv[IP])
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self.assert_packet_checksums_valid(decrypted)
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class IpsecTraTests(object):
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def test_tra_basic(self, count=1):
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""" ipsec v4 transport basic test """
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try:
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vpp_tra_sa, scapy_tra_sa = self.configure_sa_tra()
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send_pkts = self.gen_encrypt_pkts(scapy_tra_sa, self.tra_if,
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src=self.tra_if.remote_ip4,
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dst=self.tra_if.local_ip4,
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count=count)
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recv_pkts = self.send_and_expect(self.tra_if, send_pkts,
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self.tra_if, count=count)
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for p in recv_pkts:
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decrypted = vpp_tra_sa.decrypt(p[IP])
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self.assert_packet_checksums_valid(decrypted)
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finally:
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self.logger.info(self.vapi.ppcli("show error"))
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self.logger.info(self.vapi.ppcli("show ipsec"))
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def test_tra_burst(self):
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""" ipsec v4 transport burst test """
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try:
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self.test_tra_basic(count=257)
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finally:
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self.logger.info(self.vapi.ppcli("show error"))
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self.logger.info(self.vapi.ppcli("show ipsec"))
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class IpsecTunTests(object):
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def test_tun_basic(self, count=1):
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""" ipsec 4o4 tunnel basic test """
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try:
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vpp_tun_sa, scapy_tun_sa = self.configure_sa_tun()
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send_pkts = self.gen_encrypt_pkts(scapy_tun_sa, self.tun_if,
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src=self.remote_tun_if_host,
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dst=self.pg1.remote_ip4,
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count=count)
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recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1,
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count=count)
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for recv_pkt in recv_pkts:
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self.assert_equal(recv_pkt[IP].src, self.remote_tun_if_host)
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self.assert_equal(recv_pkt[IP].dst, self.pg1.remote_ip4)
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self.assert_packet_checksums_valid(recv_pkt)
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send_pkts = self.gen_pkts(self.pg1, src=self.pg1.remote_ip4,
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dst=self.remote_tun_if_host, count=count)
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recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if,
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count=count)
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for recv_pkt in recv_pkts:
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decrypt_pkt = vpp_tun_sa.decrypt(recv_pkt[IP])
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if not decrypt_pkt.haslayer(IP):
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decrypt_pkt = IP(decrypt_pkt[Raw].load)
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self.assert_equal(decrypt_pkt.src, self.pg1.remote_ip4)
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self.assert_equal(decrypt_pkt.dst, self.remote_tun_if_host)
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self.assert_packet_checksums_valid(decrypt_pkt)
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finally:
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self.logger.info(self.vapi.ppcli("show error"))
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self.logger.info(self.vapi.ppcli("show ipsec"))
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def test_tun_burst(self):
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""" ipsec 4o4 tunnel burst test """
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try:
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self.test_tun_basic(count=257)
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finally:
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self.logger.info(self.vapi.ppcli("show error"))
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self.logger.info(self.vapi.ppcli("show ipsec"))
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if __name__ == '__main__':
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unittest.main(testRunner=VppTestRunner)
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