added ikev1/alg-modp-subgroup scenario

testing/tests/ikev1/alg-modp-subgroup/description.txt

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+The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each 
+to gateway <b>moon</b> using the <b>MODP Diffie-Hellman Groups 22, 23, and 24</b>
+with <b>Prime Order Subgroups</b>.
+<p/>
+<b>carol</b> proposes the DH groups MODP_2048_224 and MODP_1024_160 whereas
+<b>dave</b> proposes MODP_2048_224 and MODP_2048_256.
+Since <b>moon</b> does not support MODP_2048_224 the roadwarriors fall back to
+MODP_1024_160 and MODP_2048_256, respectively.
+<p/>
+Upon the successful establishment of the IPsec tunnels, <b>leftfirewall=yes</b>
+automatically inserts iptables-based firewall rules that let pass the tunneled traffic.
+In order to test both tunnel and firewall, both <b>carol</b> and <b>dave</b> ping
+the client <b>alice</b> behind the gateway <b>moon</b>.
+

testing/tests/ikev1/alg-modp-subgroup/evaltest.dat

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+moon::cat /var/log/auth.log::MODP_2048_224.*refused due to strict flag::YES
+moon::ipsec statusall::IPsec SA established::YES
+carol::ipsec statusall::IPsec SA established::YES
+carol::ipsec statusall::IKE proposal: AES_CBC_128/HMAC_SHA1/MODP_1024_160::YES
+dave::ipsec statusall::IPsec SA established::YES
+dave::ipsec statusall::IKE proposal: AES_CBC_128/HMAC_SHA2_256/MODP_2048_256::YES
+carol::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_seq=1::YES
+dave::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_seq=1::YES
+moon::tcpdump::IP carol.strongswan.org > moon.strongswan.org: ESP::YES
+moon::tcpdump::IP moon.strongswan.org > carol.strongswan.org: ESP::YES
+moon::tcpdump::IP dave.strongswan.org > moon.strongswan.org: ESP::YES
+moon::tcpdump::IP moon.strongswan.org > dave.strongswan.org: ESP::YES
+

testing/tests/ikev1/alg-modp-subgroup/hosts/carol/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+        crlcheckinterval=180
+	strictcrlpolicy=no
+	charonstart=no
+	plutodebug=control
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev1
+	ike=aes128-sha1-modp2048s224,aes128-sha1-modp1024s160!
+
+conn home
+	left=PH_IP_CAROL
+	leftcert=carolCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=PH_IP_MOON
+	[email protected]
+	rightsubnet=10.1.0.0/16
+	auto=add

testing/tests/ikev1/alg-modp-subgroup/hosts/dave/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+        crlcheckinterval=180
+	strictcrlpolicy=no
+	charonstart=no
+	plutodebug=control
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev1
+	ike=aes128-sha256-modp2048s224,aes128-sha256-modp2048s256!
+
+conn home
+	left=PH_IP_DAVE
+	leftcert=daveCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=PH_IP_MOON
+	[email protected]
+	rightsubnet=10.1.0.0/16
+	auto=add

testing/tests/ikev1/alg-modp-subgroup/hosts/moon/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+        crlcheckinterval=180
+	strictcrlpolicy=no
+	charonstart=no
+	plutodebug=control
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev1
+	ike=aes128-sha256-modp2048s256,aes128-sha1-modp1024s160!
+
+conn rw
+	left=PH_IP_MOON
+	leftcert=moonCert.pem
+	[email protected]
+	leftsubnet=10.1.0.0/16
+	leftfirewall=yes
+	right=%any
+	auto=add

testing/tests/ikev1/alg-modp-subgroup/posttest.dat

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+moon::ipsec stop
+carol::ipsec stop
+dave::ipsec stop
+moon::/etc/init.d/iptables stop 2> /dev/null
+carol::/etc/init.d/iptables stop 2> /dev/null
+dave::/etc/init.d/iptables stop 2> /dev/null

testing/tests/ikev1/alg-modp-subgroup/pretest.dat

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+moon::/etc/init.d/iptables start 2> /dev/null
+carol::/etc/init.d/iptables start 2> /dev/null
+dave::/etc/init.d/iptables start 2> /dev/null
+moon::ipsec start
+carol::ipsec start
+dave::ipsec start
+carol::sleep 1
+carol::ipsec up home
+dave::ipsec up home

testing/tests/ikev1/alg-modp-subgroup/test.conf

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+#!/bin/bash
+#
+# This configuration file provides information on the
+# UML instances used for this test
+
+# All UML instances that are required for this test
+#
+UMLHOSTS="alice moon carol winnetou dave"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-c-w-d.png"
+
+# UML instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon"
+
+# UML instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon carol dave"