testing: Add ikev2/net2net-cert-sha2 scenario

testing/tests/ikev2/net2net-cert-sha2/description.txt

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+A connection between the subnets behind the gateways <b>moon</b> and <b>sun</b> is set up.
+The authentication is based on <b>X.509 certificates</b> using SHA-2 to create signatures
+as enabled by the IKEv2 Signature Authentication extension described in <b>RFC 7427</b>.
+Upon the successful establishment of the IPsec tunnel, <b>leftfirewall=yes</b> automatically
+inserts iptables-based firewall rules that let pass the tunneled traffic.
+In order to test both tunnel and firewall, client <b>alice</b> behind gateway <b>moon</b>
+pings client <b>bob</b> located behind gateway <b>sun</b>.

testing/tests/ikev2/net2net-cert-sha2/evaltest.dat

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+moon:: cat /var/log/daemon.log::authentication of.*sun.strongswan.org.*with RSA_EMSA_PKCS1_SHA512 successful::YES
+moon::ipsec status 2> /dev/null::net-net.*ESTABLISHED.*moon.strongswan.org.*sun.strongswan.org::YES
+sun:: cat /var/log/daemon.log::authentication of.*moon.strongswan.org.*with RSA_EMSA_PKCS1_SHA384 successful::YES
+sun:: ipsec status 2> /dev/null::net-net.*ESTABLISHED.*sun.strongswan.org.*moon.strongswan.org::YES
+moon::ipsec status 2> /dev/null::net-net.*INSTALLED, TUNNEL::YES
+sun:: ipsec status 2> /dev/null::net-net.*INSTALLED, TUNNEL::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_req=1::YES
+sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::YES
+sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::YES

testing/tests/ikev2/net2net-cert-sha2/hosts/moon/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+	mobike=no
+
+conn net-net
+	left=PH_IP_MOON
+	leftcert=moonCert.pem
+	leftauth=rsa-sha384
+	leftid=@moon.strongswan.org
+	leftsubnet=10.1.0.0/16
+	leftfirewall=yes
+	right=PH_IP_SUN
+	rightid=@sun.strongswan.org
+	rightsubnet=10.2.0.0/16
+	auto=add

testing/tests/ikev2/net2net-cert-sha2/hosts/moon/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 curl revocation hmac stroke kernel-netlink socket-default updown
+}

testing/tests/ikev2/net2net-cert-sha2/hosts/sun/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+    keyingtries=1
+	keyexchange=ikev2
+	mobike=no
+
+conn net-net
+	left=PH_IP_SUN
+	leftcert=sunCert.pem
+	leftauth=rsa-sha512
+	leftid=@sun.strongswan.org
+	leftsubnet=10.2.0.0/16
+	leftfirewall=yes
+	right=PH_IP_MOON
+	rightid=@moon.strongswan.org
+	rightsubnet=10.1.0.0/16
+	auto=add

testing/tests/ikev2/net2net-cert-sha2/hosts/sun/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 curl revocation hmac stroke kernel-netlink socket-default updown
+}

testing/tests/ikev2/net2net-cert-sha2/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/net2net-cert-sha2/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 1
+moon::ipsec up net-net

testing/tests/ikev2/net2net-cert-sha2/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="alice moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-w-s-b.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"