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-rwxr-xr-xresources/traffic_scripts/ipsec.py208
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diff --git a/resources/traffic_scripts/ipsec.py b/resources/traffic_scripts/ipsec.py
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+++ b/resources/traffic_scripts/ipsec.py
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+#!/usr/bin/env python
+
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Traffic script for IPsec verification."""
+
+import sys
+import logging
+
+logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
+from scapy.all import Ether, IP, ICMP, IPv6, ICMPv6EchoRequest, ICMPv6EchoReply
+from scapy.layers.ipsec import SecurityAssociation, ESP
+from ipaddress import ip_address
+
+from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
+from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
+
+
+def check_ipv4(pkt_recv, dst_tun, src_ip, dst_ip, sa_in):
+ """Check received IPv4 IPsec packet.
+
+ :param pkt_recv: Received packet to verify.
+ :param dst_tun: IPsec tunnel destination address.
+ :param src_ip: Source address of original IPv4 packet.
+ :param dst_ip: Destination address of original IPv4 packet.
+ :param sa_in: IPsec SA for packet decryption.
+ :type pkt_recv: scapy.Ether
+ :type dst_tun: str
+ :type src_ip: str
+ :type dst_ip: str
+ :type sa_sa: scapy.layers.ipsec.SecurityAssociation
+ :raises RuntimeError: If received packet is invalid.
+ """
+ if not pkt_recv.haslayer(IP):
+ raise RuntimeError(
+ 'Not an IPv4 packet received: {0}'.format(pkt_recv.__repr__()))
+
+ if pkt_recv['IP'].dst != dst_tun:
+ raise RuntimeError(
+ 'Received packet has invalid destination address: {0} '
+ 'should be: {1}'.format(pkt_recv['IP'].dst, dst_tun))
+
+ if not pkt_recv.haslayer(ESP):
+ raise RuntimeError(
+ 'Not an ESP packet received: {0}'.format(pkt_recv.__repr__()))
+
+ ip_pkt = pkt_recv['IP']
+ d_pkt = sa_in.decrypt(ip_pkt)
+
+ if d_pkt['IP'].dst != dst_ip:
+ raise RuntimeError(
+ 'Decrypted packet has invalid destination address: {0} '
+ 'should be: {1}'.format(d_pkt['IP'].dst, dst_ip))
+
+ if d_pkt['IP'].src != src_ip:
+ raise RuntimeError(
+ 'Decrypted packet has invalid source address: {0} should be: {1}'
+ .format(d_pkt['IP'].src, src_ip))
+
+ if not d_pkt.haslayer(ICMP):
+ raise RuntimeError(
+ 'Decrypted packet does not have ICMP layer: {0}'.format(
+ d_pkt.__repr__()))
+
+
+def check_ipv6(pkt_recv, dst_tun, src_ip, dst_ip, sa_in):
+ """Check received IPv6 IPsec packet.
+
+ :param pkt_recv: Received packet to verify.
+ :param dst_tun: IPsec tunnel destination address.
+ :param src_ip: Source address of original IPv6 packet.
+ :param dst_ip: Destination address of original IPv6 packet.
+ :param sa_in: IPsec SA for packet decryption.
+ :type pkt_recv: scapy.Ether
+ :type dst_tun: str
+ :type src_ip: str
+ :type dst_ip: str
+ :type sa_in: scapy.layers.ipsec.SecurityAssociation
+ :raises RuntimeError: If received packet is invalid.
+ """
+ if not pkt_recv.haslayer(IPv6):
+ raise RuntimeError(
+ 'Not an IPv6 packet received: {0}'.format(pkt_recv.__repr__()))
+
+ if pkt_recv['IPv6'].dst != dst_tun:
+ raise RuntimeError(
+ 'Received packet has invalid destination address: {0} '
+ 'should be: {1}'.format(pkt_recv['IPv6'].dst, dst_tun))
+
+ if not pkt_recv.haslayer(ESP):
+ raise RuntimeError(
+ 'Not an ESP packet received: {0}'.format(pkt_recv.__repr__()))
+
+ ip_pkt = pkt_recv['IPv6']
+ d_pkt = sa_in.decrypt(ip_pkt)
+
+ if d_pkt['IPv6'].dst != dst_ip:
+ raise RuntimeError(
+ 'Decrypted packet has invalid destination address {0}: '
+ 'should be: {1}'.format(d_pkt['IPv6'].dst, dst_ip))
+
+ if d_pkt['IPv6'].src != src_ip:
+ raise RuntimeError(
+ 'Decrypted packet has invalid source address: {0} should be: {1}'
+ .format(d_pkt['IPv6'].src, src_ip))
+
+ if not d_pkt.haslayer(ICMPv6EchoReply):
+ raise RuntimeError(
+ 'Decrypted packet does not have ICMP layer: {0}'.format(
+ d_pkt.__repr__()))
+
+
+# pylint: disable=too-many-locals
+# pylint: disable=too-many-statements
+def main():
+ """Send and receive IPsec packet."""
+ args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
+ 'crypto_alg', 'crypto_key', 'integ_alg',
+ 'integ_key', 'l_spi', 'r_spi'],
+ ['src_tun', 'dst_tun'])
+
+ rxq = RxQueue(args.get_arg('rx_if'))
+ txq = TxQueue(args.get_arg('tx_if'))
+
+ src_mac = args.get_arg('src_mac')
+ dst_mac = args.get_arg('dst_mac')
+ src_ip = args.get_arg('src_ip')
+ dst_ip = args.get_arg('dst_ip')
+ crypto_alg = args.get_arg('crypto_alg')
+ crypto_key = args.get_arg('crypto_key')
+ integ_alg = args.get_arg('integ_alg')
+ integ_key = args.get_arg('integ_key')
+ l_spi = int(args.get_arg('l_spi'))
+ r_spi = int(args.get_arg('r_spi'))
+ src_tun = args.get_arg('src_tun')
+ dst_tun = args.get_arg('dst_tun')
+
+ is_ipv4 = True
+ if 6 == ip_address(unicode(src_ip)).version:
+ is_ipv4 = False
+
+ tunnel_out = None
+ tunnel_in = None
+
+ if src_tun and dst_tun:
+ if is_ipv4:
+ tunnel_out = IP(src=src_tun, dst=dst_tun)
+ tunnel_in = IP(src=dst_tun, dst=src_tun)
+ else:
+ tunnel_out = IPv6(src=src_tun, dst=dst_tun)
+ tunnel_in = IPv6(src=dst_tun, dst=src_tun)
+ else:
+ src_tun = src_ip
+ dst_tun = dst_ip
+
+ sa_in = SecurityAssociation(ESP, spi=r_spi, crypt_algo=crypto_alg,
+ crypt_key=crypto_key, auth_algo=integ_alg,
+ auth_key=integ_key, tunnel_header=tunnel_in)
+
+ sa_out = SecurityAssociation(ESP, spi=l_spi, crypt_algo=crypto_alg,
+ crypt_key=crypto_key, auth_algo=integ_alg,
+ auth_key=integ_key, tunnel_header=tunnel_out)
+
+ sent_packets = []
+
+ ip_pkt = None
+
+ if is_ipv4:
+ ip_pkt = IP(src=src_ip, dst=dst_ip) / \
+ ICMP()
+ ip_pkt = IP(str(ip_pkt))
+ else:
+ ip_pkt = IPv6(src=src_ip, dst=dst_ip) / \
+ ICMPv6EchoRequest()
+ ip_pkt = IPv6(str(ip_pkt))
+
+ e_pkt = sa_out.encrypt(ip_pkt)
+ pkt_send = Ether(src=src_mac, dst=dst_mac) / \
+ e_pkt
+
+ sent_packets.append(pkt_send)
+ txq.send(pkt_send)
+
+ pkt_recv = rxq.recv(2, sent_packets)
+
+ if pkt_recv is None:
+ raise RuntimeError('Rx timeout')
+
+ if is_ipv4:
+ check_ipv4(pkt_recv, src_tun, dst_ip, src_ip, sa_in)
+ else:
+ check_ipv6(pkt_recv, src_tun, dst_ip, src_ip, sa_in)
+
+ sys.exit(0)
+
+if __name__ == "__main__":
+ main()