testing: Add an IKEv2 host2host AH transport mode test case

testing/tests/ikev2/host2host-ah/description.txt

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+An IPsec <b>AH transport-mode</b> connection using AES-XCBC between the hosts
+<b>moon</b> and <b>sun</b> is successfully set up. <b>leftfirewall=yes</b>
+automatically inserts iptables-based firewall rules that let pass the decrypted
+IP packets. In order to test the host-to-host connection <b>moon</b> pings
+<b>sun</b>.

testing/tests/ikev2/host2host-ah/evaltest.dat

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+moon::ipsec status 2> /dev/null::host-host.*ESTABLISHED.*moon.strongswan.org.*sun.strongswan.org::YES
+sun:: ipsec status 2> /dev/null::host-host.*ESTABLISHED.*sun.strongswan.org.*moon.strongswan.org::YES
+moon::ipsec status 2> /dev/null::host-host.*INSTALLED, TRANSPORT::YES
+sun:: ipsec status 2> /dev/null::host-host.*INSTALLED, TRANSPORT::YES
+moon::ping -c 1 PH_IP_SUN::64 bytes from PH_IP_SUN: icmp_req=1::YES
+sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: AH::YES
+sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: AH::YES

testing/tests/ikev2/host2host-ah/hosts/moon/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	keyexchange=ikev2
+
+conn host-host
+	left=PH_IP_MOON
+	leftcert=moonCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=PH_IP_SUN
+	[email protected]
+	type=transport
+	ah=aesxcbc
+	auto=add

testing/tests/ikev2/host2host-ah/hosts/moon/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 revocation hmac xcbc stroke kernel-netlink socket-default updown
+  multiple_authentication = no
+}

testing/tests/ikev2/host2host-ah/hosts/sun/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	keyexchange=ikev2
+
+conn host-host
+	left=PH_IP_SUN
+	leftcert=sunCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=PH_IP_MOON
+	[email protected]
+	type=transport
+	ah=aesxcbc
+	auto=add

testing/tests/ikev2/host2host-ah/hosts/sun/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 revocation hmac xcbc stroke kernel-netlink socket-default updown
+  multiple_authentication = no
+}

testing/tests/ikev2/host2host-ah/posttest.dat

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+moon::ipsec stop
+sun::ipsec stop
+moon::iptables-restore < /etc/iptables.flush
+sun::iptables-restore < /etc/iptables.flush

testing/tests/ikev2/host2host-ah/pretest.dat

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+moon::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+moon::ipsec start
+sun::ipsec start
+moon::sleep 2
+moon::ipsec up host-host

testing/tests/ikev2/host2host-ah/test.conf

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+#!/bin/bash
+#
+# This configuration file provides information on the
+# guest instances used for this test
+
+# All guest instances that are required for this test
+#
+VIRTHOSTS="moon winnetou sun"
+
+# Corresponding block diagram
+#
+DIAGRAM="m-w-s.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="sun"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon sun"