ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
17dcec0b940374127f6e1e004fb3ec261a0a3709
vpp/test/template_ipsec.py
Neale Ranns 17dcec0b94 IPSEC: API modernisation 
- use enums to enumerate the algoritms and protocols that are supported
- use address_t types to simplify encode/deocde
- use typedefs of entry objects to get consistency between add/del API and dump

Change-Id: I7e7c58c06a150e2439633ba9dca58bc1049677ee
Signed-off-by: Neale Ranns <nranns@cisco.com>
2019-01-31 20:44:22 +00:00

445 lines
18 KiB
Python
Raw Blame History

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)
Reference in New Issue View Git Blame Copy Permalink