PRE-TEST

moon# iptables-restore < /etc/iptables.rules

carol# iptables-restore < /etc/iptables.rules

dave# iptables-restore < /etc/iptables.rules

moon# systemctl start strongswan

carol# systemctl start strongswan

dave# systemctl start strongswan

moon# expect-connection rw

carol# expect-connection home

carol# swanctl --initiate --child home 2> /dev/null
[IKE] initiating IKE_SA home[1] to 192.168.0.1
[ENC] generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
[NET] sending packet: from 192.168.0.100[500] to 192.168.0.1[500] (240 bytes)
[NET] received packet: from 192.168.0.1[500] to 192.168.0.100[500] (273 bytes)
[ENC] parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) CERTREQ N(FRAG_SUP) N(HASH_ALG) N(CHDLESS_SUP) N(MULT_AUTH) ]
[CFG] selected proposal: IKE:AES_CBC_128/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/CURVE_25519
[IKE] received cert request for "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[IKE] sending cert request for "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[IKE] authentication of 'carol@strongswan.org' (myself) with RSA_EMSA_PSS_SHA2_512_SALT_64 successful
[IKE] sending end entity cert "C=CH, O=strongSwan Project, OU=Research, CN=carol@strongswan.org"
[IKE] establishing CHILD_SA home{1}
[ENC] generating IKE_AUTH request 1 [ IDi CERT N(INIT_CONTACT) CERTREQ IDr AUTH SA TSi TSr N(MOBIKE_SUP) N(ADD_6_ADDR) N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
[ENC] splitting IKE message (1952 bytes) into 2 fragments
[ENC] generating IKE_AUTH request 1 [ EF(1/2) ]
[ENC] generating IKE_AUTH request 1 [ EF(2/2) ]
[NET] sending packet: from 192.168.0.100[4500] to 192.168.0.1[4500] (1236 bytes)
[NET] sending packet: from 192.168.0.100[4500] to 192.168.0.1[4500] (788 bytes)
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.100[4500] (1236 bytes)
[ENC] parsed IKE_AUTH response 1 [ EF(1/2) ]
[ENC] received fragment #1 of 2, waiting for complete IKE message
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.100[4500] (724 bytes)
[ENC] parsed IKE_AUTH response 1 [ EF(2/2) ]
[ENC] received fragment #2 of 2, reassembled fragmented IKE message (1888 bytes)
[ENC] parsed IKE_AUTH response 1 [ IDr CERT AUTH SA TSi TSr N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_6_ADDR) N(ADD_6_ADDR) ]
[IKE] received end entity cert "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   using certificate "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   reached self-signed root ca with a path length of 0
[CFG] checking certificate status of "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   fetching crl from 'http://crl.strongswan.org/strongswan.crl' ...
[CFG]   using trusted certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   crl correctly signed by "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   crl is valid: until Mar 25 18:47:43 2025
[CFG] certificate status is good
[IKE] authentication of 'moon.strongswan.org' with RSA_EMSA_PSS_SHA2_256_SALT_32 successful
[IKE] peer supports MOBIKE
[IKE] IKE_SA home[1] established between 192.168.0.100[carol@strongswan.org]...192.168.0.1[moon.strongswan.org]
[IKE] scheduling rekeying in 14202s
[IKE] maximum IKE_SA lifetime 15642s
[CFG] selected proposal: ESP:AES_GCM_16_128/NO_EXT_SEQ
[IKE] CHILD_SA home{1} established with SPIs ce3f0065_i c55de3b5_o and TS 192.168.0.100/32 === 10.1.0.0/16
initiate completed successfully

dave# expect-connection home

dave# swanctl --initiate --child home 2> /dev/null
[IKE] initiating IKE_SA home[1] to 192.168.0.1
[ENC] generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
[NET] sending packet: from 192.168.0.200[500] to 192.168.0.1[500] (240 bytes)
[NET] received packet: from 192.168.0.1[500] to 192.168.0.200[500] (273 bytes)
[ENC] parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) CERTREQ N(FRAG_SUP) N(HASH_ALG) N(CHDLESS_SUP) N(MULT_AUTH) ]
[CFG] selected proposal: IKE:AES_CBC_128/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/CURVE_25519
[IKE] received cert request for "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[IKE] sending cert request for "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[IKE] authentication of 'dave@strongswan.org' (myself) with RSA_EMSA_PSS_SHA2_384_SALT_48 successful
[IKE] sending end entity cert "C=CH, O=strongSwan Project, OU=Accounting, CN=dave@strongswan.org"
[IKE] establishing CHILD_SA home{1}
[ENC] generating IKE_AUTH request 1 [ IDi CERT N(INIT_CONTACT) CERTREQ IDr AUTH SA TSi TSr N(MOBIKE_SUP) N(ADD_6_ADDR) N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
[ENC] splitting IKE message (1952 bytes) into 2 fragments
[ENC] generating IKE_AUTH request 1 [ EF(1/2) ]
[ENC] generating IKE_AUTH request 1 [ EF(2/2) ]
[NET] sending packet: from 192.168.0.200[4500] to 192.168.0.1[4500] (1236 bytes)
[NET] sending packet: from 192.168.0.200[4500] to 192.168.0.1[4500] (788 bytes)
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.200[4500] (1236 bytes)
[ENC] parsed IKE_AUTH response 1 [ EF(1/2) ]
[ENC] received fragment #1 of 2, waiting for complete IKE message
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.200[4500] (724 bytes)
[ENC] parsed IKE_AUTH response 1 [ EF(2/2) ]
[ENC] received fragment #2 of 2, reassembled fragmented IKE message (1888 bytes)
[ENC] parsed IKE_AUTH response 1 [ IDr CERT AUTH SA TSi TSr N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_6_ADDR) N(ADD_6_ADDR) ]
[IKE] received end entity cert "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   using certificate "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   reached self-signed root ca with a path length of 0
[CFG] checking certificate status of "C=CH, O=strongSwan Project, CN=moon.strongswan.org"
[CFG]   fetching crl from 'http://crl.strongswan.org/strongswan.crl' ...
[CFG]   using trusted certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   crl correctly signed by "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
[CFG]   crl is valid: until Mar 25 18:47:43 2025
[CFG] certificate status is good
[IKE] authentication of 'moon.strongswan.org' with RSA_EMSA_PSS_SHA2_256_SALT_32 successful
[IKE] peer supports MOBIKE
[IKE] IKE_SA home[1] established between 192.168.0.200[dave@strongswan.org]...192.168.0.1[moon.strongswan.org]
[IKE] scheduling rekeying in 13043s
[IKE] maximum IKE_SA lifetime 14483s
[CFG] selected proposal: ESP:AES_GCM_16_128/NO_EXT_SEQ
[IKE] CHILD_SA home{1} established with SPIs c8cf1dd3_i cdcfef65_o and TS 192.168.0.200/32 === 10.1.0.0/16
initiate completed successfully


TEST

carol# cat /var/log/daemon.log | grep 'authentication of.*moon.strongswan.org.*with RSA_EMSA_PSS_SHA2_256_SALT_32 successful' [YES]
Mar 10 19:23:50 carol charon-systemd: 16[IKE] authentication of 'moon.strongswan.org' with RSA_EMSA_PSS_SHA2_256_SALT_32 successful

dave # cat /var/log/daemon.log | grep 'authentication of.*moon.strongswan.org.*with RSA_EMSA_PSS_SHA2_256_SALT_32 successful' [YES]
Mar 10 19:23:51 dave charon-systemd: 14[IKE] authentication of 'moon.strongswan.org' with RSA_EMSA_PSS_SHA2_256_SALT_32 successful

moon # cat /var/log/daemon.log | grep 'authentication of.*carol@strongswan.org.*with RSA_EMSA_PSS_SHA2_512_SALT_64 successful' [YES]
Mar 10 19:23:49 moon charon-systemd: 07[IKE] authentication of 'carol@strongswan.org' with RSA_EMSA_PSS_SHA2_512_SALT_64 successful

moon # cat /var/log/daemon.log | grep 'authentication of.*dave@strongswan.org.*with RSA_EMSA_PSS_SHA2_384_SALT_48 successful' [YES]
Mar 10 19:23:50 moon charon-systemd: 01[IKE] authentication of 'dave@strongswan.org' with RSA_EMSA_PSS_SHA2_384_SALT_48 successful

alice# ping -c 1 192.168.0.100 | grep '64 bytes from 192.168.0.100: icmp_.eq=1' [YES]
64 bytes from 192.168.0.100: icmp_seq=1 ttl=63 time=1.21 ms

alice# ping -c 1 192.168.0.200 | grep '64 bytes from 192.168.0.200: icmp_.eq=1' [YES]
64 bytes from 192.168.0.200: icmp_seq=1 ttl=63 time=1.04 ms

carol# swanctl --list-sas --raw 2> /dev/null | grep 'home.*version=2 state=ESTABLISHED local-host=192.168.0.100 local-port=4500 local-id=carol@strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.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.*home.*state=INSTALLED mode=TUNNEL.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[192.168.0.100/32] remote-ts=\[10.1.0.0/16]' [YES]
list-sa event {home {uniqueid=1 version=2 state=ESTABLISHED local-host=192.168.0.100 local-port=4500 local-id=carol@strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.strongswan.org initiator=yes initiator-spi=43ec7ebf25ca74b2 responder-spi=142c69b8edc31697 encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519 established=1 rekey-time=14201 child-sas {home-1 {name=home uniqueid=1 reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP spi-in=ce3f0065 spi-out=c55de3b5 encr-alg=AES_GCM_16 encr-keysize=128 bytes-in=84 packets-in=1 use-in=0 bytes-out=84 packets-out=1 use-out=0 rekey-time=3405 life-time=3959 install-time=1 local-ts=[192.168.0.100/32] remote-ts=[10.1.0.0/16]}}}}

dave # swanctl --list-sas --raw 2> /dev/null | grep 'home.*version=2 state=ESTABLISHED local-host=192.168.0.200 local-port=4500 local-id=dave@strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.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.*home.*state=INSTALLED mode=TUNNEL.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[192.168.0.200/32] remote-ts=\[10.1.0.0/16]' [YES]
list-sa event {home {uniqueid=1 version=2 state=ESTABLISHED local-host=192.168.0.200 local-port=4500 local-id=dave@strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.strongswan.org initiator=yes initiator-spi=1ed235b1737cbbe1 responder-spi=7b862567513f6580 encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519 established=0 rekey-time=13043 child-sas {home-1 {name=home uniqueid=1 reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP spi-in=c8cf1dd3 spi-out=cdcfef65 encr-alg=AES_GCM_16 encr-keysize=128 bytes-in=84 packets-in=1 use-in=0 bytes-out=84 packets-out=1 use-out=0 rekey-time=3506 life-time=3960 install-time=1 local-ts=[192.168.0.200/32] remote-ts=[10.1.0.0/16]}}}}

moon # swanctl --list-sas --ike-id 1 --raw 2> /dev/null | grep 'rw.*version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.100 remote-port=4500 remote-id=carol@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.*net.*reqid=1 state=INSTALLED mode=TUNNEL.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.1.0.0/16] remote-ts=\[192.168.0.100/32]' [YES]
list-sa event {rw {uniqueid=1 version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.100 remote-port=4500 remote-id=carol@strongswan.org initiator-spi=43ec7ebf25ca74b2 responder-spi=142c69b8edc31697 encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519 established=1 rekey-time=13224 child-sas {net-1 {name=net uniqueid=1 reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP spi-in=c55de3b5 spi-out=ce3f0065 encr-alg=AES_GCM_16 encr-keysize=128 bytes-in=84 packets-in=1 use-in=1 bytes-out=84 packets-out=1 use-out=1 rekey-time=3281 life-time=3959 install-time=1 local-ts=[10.1.0.0/16] remote-ts=[192.168.0.100/32]}}}}

moon # swanctl --list-sas --ike-id 2 --raw 2> /dev/null | grep 'rw.*version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.200 remote-port=4500 remote-id=dave@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.*net.*reqid=2 state=INSTALLED mode=TUNNEL.*ESP.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.1.0.0/16] remote-ts=\[192.168.0.200/32]' [YES]
list-sa event {rw {uniqueid=2 version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.200 remote-port=4500 remote-id=dave@strongswan.org initiator-spi=1ed235b1737cbbe1 responder-spi=7b862567513f6580 encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=CURVE_25519 established=1 rekey-time=13451 child-sas {net-2 {name=net uniqueid=2 reqid=2 state=INSTALLED mode=TUNNEL protocol=ESP spi-in=cdcfef65 spi-out=c8cf1dd3 encr-alg=AES_GCM_16 encr-keysize=128 bytes-in=84 packets-in=1 use-in=1 bytes-out=84 packets-out=1 use-out=1 rekey-time=3268 life-time=3959 install-time=1 local-ts=[10.1.0.0/16] remote-ts=[192.168.0.200/32]}}}}

moon# killall tcpdump

moon# cat /tmp/tcpdump.log | grep 'IP moon.strongswan.org > carol.strongswan.org: ESP' [YES]
19:23:50.942558 IP moon.strongswan.org > carol.strongswan.org: ESP(spi=0xce3f0065,seq=0x1), length 120

moon# cat /tmp/tcpdump.log | grep 'IP carol.strongswan.org > moon.strongswan.org: ESP' [YES]
19:23:50.943231 IP carol.strongswan.org > moon.strongswan.org: ESP(spi=0xc55de3b5,seq=0x1), length 120

moon# cat /tmp/tcpdump.log | grep 'IP moon.strongswan.org > dave.strongswan.org: ESP' [YES]
19:23:50.972368 IP moon.strongswan.org > dave.strongswan.org: ESP(spi=0xc8cf1dd3,seq=0x1), length 120

moon# cat /tmp/tcpdump.log | grep 'IP dave.strongswan.org > moon.strongswan.org: ESP' [YES]
19:23:50.972889 IP dave.strongswan.org > moon.strongswan.org: ESP(spi=0xcdcfef65,seq=0x1), length 120


POST-TEST

carol# swanctl --terminate --ike home
[IKE] deleting IKE_SA home[1] between 192.168.0.100[carol@strongswan.org]...192.168.0.1[moon.strongswan.org]
[IKE] sending DELETE for IKE_SA home[1]
[ENC] generating INFORMATIONAL request 2 [ D ]
[NET] sending packet: from 192.168.0.100[4500] to 192.168.0.1[4500] (80 bytes)
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.100[4500] (80 bytes)
[ENC] parsed INFORMATIONAL response 2 [ ]
[IKE] IKE_SA deleted
terminate completed successfully

dave# swanctl --terminate --ike home
[IKE] deleting IKE_SA home[1] between 192.168.0.200[dave@strongswan.org]...192.168.0.1[moon.strongswan.org]
[IKE] sending DELETE for IKE_SA home[1]
[ENC] generating INFORMATIONAL request 2 [ D ]
[NET] sending packet: from 192.168.0.200[4500] to 192.168.0.1[4500] (80 bytes)
[NET] received packet: from 192.168.0.1[4500] to 192.168.0.200[4500] (80 bytes)
[ENC] parsed INFORMATIONAL response 2 [ ]
[IKE] IKE_SA deleted
terminate completed successfully

carol# systemctl stop strongswan

dave# systemctl stop strongswan

moon# systemctl stop strongswan

moon# iptables-restore < /etc/iptables.flush

carol# iptables-restore < /etc/iptables.flush

dave# iptables-restore < /etc/iptables.flush