testing: Add libipsec scenarios that exchange raw ESP packets
This commit is contained in:
Tobias Brunner
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A connection between the hosts <b>moon</b> and <b>sun</b> is set up.
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The authentication is based on <b>X.509 certificates</b> and the <b>kernel-libipsec</b>
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plugin is used for userland IPsec ESP encryption. In this scenario, UDP encapsulation
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isn't enforced by the plugin as sending of raw ESP packets is enabled.
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<b>Firewall marks</b> are used to make the direct ESP connection possible and
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still allow IKE traffic to flow freely between the two hosts.
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<p/>
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Upon the successful establishment of the IPsec tunnel, an updown script automatically
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inserts iptables-based firewall rules that let pass the traffic tunneled via the
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<b>ipsec0</b> tun interface. In order to test both host-to-host tunnel and firewall,
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<b>moon</b> pings <b>sun</b>.
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moon::ping -c 1 PH_IP_SUN::64 bytes from PH_IP_SUN: icmp_.eq=1::YES
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moon::swanctl --list-sas --raw 2> /dev/null::host-host.*version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=500 local-id=moon.strongswan.org remote-host=192.168.0.2 remote-port=500 remote-id=sun.strongswan.org initiator=yes.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519.*child-sas.*host-host.*reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128.*local-ts=\[192.168.0.1/32] remote-ts=\[192.168.0.2/32]::YES
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sun::swanctl --list-sas --raw 2> /dev/null::host-host.*version=2 state=ESTABLISHED local-host=192.168.0.2 local-port=500 local-id=sun.strongswan.org remote-host=192.168.0.1 remote-port=500 remote-id=moon.strongswan.org.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519.*child-sas.*host-host.*reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP.*encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128.*local-ts=\[192.168.0.2/32] remote-ts=\[192.168.0.1/32]::YES
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sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::YES
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sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::YES
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# /etc/strongswan.conf - strongSwan configuration file
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swanctl {
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load = pem pkcs1 x509 revocation constraints pubkey openssl random
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}
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charon-systemd {
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load = random nonce aes sha1 sha2 pem pkcs1 curve25519 gmp x509 curl revocation hmac kdf vici kernel-libipsec kernel-netlink socket-default updown
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multiple_authentication = no
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plugins {
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kernel-netlink {
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fwmark = !0x42
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}
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socket-default {
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fwmark = 0x42
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}
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kernel-libipsec {
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allow_peer_ts = yes
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raw_esp = yes
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}
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}
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}
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+26
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connections {
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host-host {
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local_addrs = 192.168.0.1
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remote_addrs = 192.168.0.2
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local {
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auth = pubkey
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certs = moonCert.pem
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id = moon.strongswan.org
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}
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remote {
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auth = pubkey
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id = sun.strongswan.org
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}
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children {
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host-host {
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updown = /etc/updown
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esp_proposals = aes128-sha256-x25519
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}
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}
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version = 2
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mobike = no
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proposals = aes128-sha256-x25519
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}
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}
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#!/bin/sh
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TUN_NAME=ipsec0
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# use protocol specific options to set ports
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case "$PLUTO_MY_PROTOCOL" in
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1) # ICMP
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ICMP_TYPE_OPTION="--icmp-type"
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;;
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58) # ICMPv6
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ICMP_TYPE_OPTION="--icmpv6-type"
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;;
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*)
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;;
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esac
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# are there port numbers?
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if [ "$PLUTO_MY_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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S_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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D_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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else
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S_MY_PORT="--sport $PLUTO_MY_PORT"
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D_MY_PORT="--dport $PLUTO_MY_PORT"
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fi
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fi
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if [ "$PLUTO_PEER_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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# the syntax is --icmp[v6]-type type[/code], so add it to the existing option
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S_MY_PORT="$S_MY_PORT/$PLUTO_PEER_PORT"
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D_MY_PORT="$D_MY_PORT/$PLUTO_PEER_PORT"
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else
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S_PEER_PORT="--sport $PLUTO_PEER_PORT"
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D_PEER_PORT="--dport $PLUTO_PEER_PORT"
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fi
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fi
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case "$PLUTO_VERB" in
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up-host)
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iptables -I OUTPUT 1 -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -I INPUT 1 -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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down-host)
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iptables -D OUTPUT -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -D INPUT -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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esac
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@@ -0,0 +1,24 @@
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# /etc/strongswan.conf - strongSwan configuration file
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swanctl {
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load = pem pkcs1 x509 revocation constraints pubkey openssl random
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}
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charon-systemd {
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load = random nonce aes sha1 sha2 pem pkcs1 curve25519 gmp x509 curl revocation hmac kdf vici kernel-libipsec kernel-netlink socket-default updown
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multiple_authentication = no
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plugins {
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kernel-netlink {
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fwmark = !0x42
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}
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socket-default {
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fwmark = 0x42
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}
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kernel-libipsec {
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allow_peer_ts = yes
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raw_esp = yes
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}
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}
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}
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+26
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connections {
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host-host {
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local_addrs = 192.168.0.2
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remote_addrs = 192.168.0.1
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local {
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auth = pubkey
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certs = sunCert.pem
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id = sun.strongswan.org
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}
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remote {
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auth = pubkey
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id = moon.strongswan.org
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}
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children {
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host-host {
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updown = /etc/updown
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esp_proposals = aes128-sha256-x25519
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}
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}
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version = 2
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mobike = no
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proposals = aes128-sha256-x25519
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}
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}
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@@ -0,0 +1,59 @@
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#!/bin/sh
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TUN_NAME=ipsec0
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# use protocol specific options to set ports
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case "$PLUTO_MY_PROTOCOL" in
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1) # ICMP
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ICMP_TYPE_OPTION="--icmp-type"
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;;
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58) # ICMPv6
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ICMP_TYPE_OPTION="--icmpv6-type"
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;;
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*)
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;;
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esac
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# are there port numbers?
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if [ "$PLUTO_MY_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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S_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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D_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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else
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S_MY_PORT="--sport $PLUTO_MY_PORT"
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D_MY_PORT="--dport $PLUTO_MY_PORT"
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fi
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fi
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if [ "$PLUTO_PEER_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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# the syntax is --icmp[v6]-type type[/code], so add it to the existing option
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S_MY_PORT="$S_MY_PORT/$PLUTO_PEER_PORT"
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D_MY_PORT="$D_MY_PORT/$PLUTO_PEER_PORT"
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else
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S_PEER_PORT="--sport $PLUTO_PEER_PORT"
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D_PEER_PORT="--dport $PLUTO_PEER_PORT"
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fi
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fi
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case "$PLUTO_VERB" in
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up-host)
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iptables -I OUTPUT 1 -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -I INPUT 1 -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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down-host)
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iptables -D OUTPUT -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -D INPUT -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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esac
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@@ -0,0 +1,7 @@
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moon::swanctl --terminate --ike host-host 2> /dev/null
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moon::systemctl stop strongswan
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sun::systemctl stop strongswan
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moon::iptables-restore < /etc/iptables.flush
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sun::iptables-restore < /etc/iptables.flush
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moon::sysctl --pattern net.ipv4.conf.all.rp_filter --system
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sun::sysctl --pattern net.ipv4.conf.all.rp_filter --system
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@@ -0,0 +1,9 @@
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moon::sysctl -w net.ipv4.conf.all.rp_filter=2
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sun::sysctl -w net.ipv4.conf.all.rp_filter=2
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moon::iptables-restore < /etc/iptables.rules
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sun::iptables-restore < /etc/iptables.rules
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moon::systemctl start strongswan
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sun::systemctl start strongswan
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sun::expect-connection host-host
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moon::expect-connection host-host
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moon::swanctl --initiate --child host-host 2> /dev/null
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@@ -0,0 +1,25 @@
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#!/bin/bash
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#
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# This configuration file provides information on the
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# guest instances used for this test
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# All guest instances that are required for this test
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#
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VIRTHOSTS="moon winnetou sun"
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# Corresponding block diagram
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#
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DIAGRAM="m-w-s.png"
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# Guest instances on which tcpdump is to be started
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#
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TCPDUMPHOSTS="sun"
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# Guest instances on which IPsec is started
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# Used for IPsec logging purposes
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#
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IPSECHOSTS="moon sun"
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# charon controlled by swanctl
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#
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SWANCTL=1
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