Platform Trust Service Integrity Measurement Collector (PTS-IMC)¶

With the command

ipsec start

the TNC-enabled IPsec client is started:

Nov 29 07:39:21 merthyr charon: 00[DMN] Starting IKEv2 charon daemon (strongSwan 4.6.2dr1)
Nov 29 07:39:21 merthyr charon: 00[KNL] listening on interfaces:
Nov 29 07:39:21 merthyr charon: 00[KNL]   wlan0
Nov 29 07:39:21 merthyr charon: 00[KNL]     10.35.167.97
Nov 29 07:39:21 merthyr charon: 00[KNL]     fe80::221:6aff:fe06:cf4c
Nov 29 07:39:21 merthyr charon: 00[KNL]   umlbr0
Nov 29 07:39:21 merthyr charon: 00[KNL]     192.168.0.254
Nov 29 07:39:21 merthyr charon: 00[KNL]     fe80::103c:e8ff:fec0:db34

The file /etc/tnc_config

IMC configuration file for strongSwan client 

IMC "Attestation" /usr/lib/ipsec/imcvs/imc-attestation.so

defines which IMCs are loaded by the TNC client:

Nov 29 07:39:21 merthyr charon: 00[TNC] loading IMCs from '/etc/tnc_config'
Nov 29 07:39:21 merthyr charon: 00[PTS]   mandatory PTS measurement algorithm HASH_SHA1[sha1] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   mandatory PTS measurement algorithm HASH_SHA256[openssl] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   optional  PTS measurement algorithm HASH_SHA384[openssl] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   optional  PTS DH group MODP_2048[gmp] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   optional  PTS DH group MODP_1536[gmp] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   optional  PTS DH group MODP_1024[gmp] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   mandatory PTS DH group ECP_256[openssl] available
Nov 29 07:39:21 merthyr charon: 00[PTS]   optional  PTS DH group ECP_384[openssl] available
Nov 29 07:39:21 merthyr charon: 00[TNC] added IETF attributes
Nov 29 07:39:21 merthyr charon: 00[TNC] added ITA-HSR attributes
Nov 29 07:39:21 merthyr charon: 00[LIB] libimcv initialized
Nov 29 07:39:21 merthyr charon: 00[IMC] IMC 1 "Attestation" initialized
Nov 29 07:39:21 merthyr charon: 00[TNC] added TCG attributes
Nov 29 07:39:21 merthyr charon: 00[PTS] added TCG functional component namespace
Nov 29 07:39:21 merthyr charon: 00[PTS] added ITA-HSR functional component namespace
Nov 29 07:39:21 merthyr charon: 00[PTS] added ITA-HSR functional component 'Trusted GRUB Boot Loader'
Nov 29 07:39:21 merthyr charon: 00[PTS] added ITA-HSR functional component 'Trusted Boot'
Nov 29 07:39:21 merthyr charon: 00[PTS] added ITA-HSR functional component 'Linux IMA'
Nov 29 07:39:21 merthyr charon: 00[LIB] libpts initialized
Nov 29 07:39:21 merthyr charon: 00[IMC] IMC 1 "Attestation" provided with bind function
Nov 29 07:39:21 merthyr charon: 00[TNC] IMC 1 supports 1 message type: 0x00559701
Nov 29 07:39:21 merthyr charon: 00[TNC] IMC 1 "Attestation" loaded from '/usr/lib/ipsec/imcvs/imc-attestation.so'

Next the IKEv2 credentials and all necessary plugins are loaded

Nov 29 07:39:21 merthyr charon: 00[CFG] loading ca certificates from '/etc/ipsec.d/cacerts'
Nov 29 07:39:21 merthyr charon: 00[CFG]   loaded ca certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA" from '/etc/ipsec.d/cacerts/strongswanCert.pem'
Nov 29 07:39:21 merthyr charon: 00[CFG] loading aa certificates from '/etc/ipsec.d/aacerts'
Nov 29 07:39:21 merthyr charon: 00[CFG] loading ocsp signer certificates from '/etc/ipsec.d/ocspcerts'
Nov 29 07:39:21 merthyr charon: 00[CFG] loading attribute certificates from '/etc/ipsec.d/acerts'
Nov 29 07:39:21 merthyr charon: 00[CFG] loading crls from '/etc/ipsec.d/crls'
Nov 29 07:39:21 merthyr charon: 00[CFG] loading secrets from '/etc/ipsec.secrets'
Nov 29 07:39:21 merthyr charon: 00[CFG]   loaded EAP secret for carol@strongswan.org
Nov 29 07:39:21 merthyr charon: 00[DMN] loaded plugins: sha1 random gmp pkcs1 pem x509 pubkey openssl hmac revocation curl kernel-netlink socket-default eap-mschapv2 eap-md5 eap-tls eap-ttls eap-tnc tnc-imc tnc-tnccs tnccs-20 eap-identity resolve stroke 
Nov 29 07:39:21 merthyr charon: 00[JOB] spawning 16 worker threads

Now the IKEv2 negotiation automatically starts with the IKE_SA_INIT exchange

Nov 29 07:39:22 merthyr charon: 04[CFG] received stroke: add connection 'home'
Nov 29 07:39:22 merthyr charon: 04[CFG] left nor right host is our side, assuming left=local
Nov 29 07:39:22 merthyr charon: 04[CFG] added configuration 'home'
Nov 29 07:39:22 merthyr charon: 04[CFG] received stroke: initiate 'home'
Nov 29 07:39:22 merthyr charon: 04[IKE] initiating IKE_SA home[1] to 192.168.0.1
Nov 29 07:39:22 merthyr charon: 04[ENC] generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) ]
Nov 29 07:39:22 merthyr charon: 04[NET] sending packet: from 192.168.0.254[500] to 192.168.0.1[500]
Nov 29 07:39:22 merthyr charon: 06[NET] received packet: from 192.168.0.1[500] to 192.168.0.254[500]
Nov 29 07:39:22 merthyr charon: 06[ENC] parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) ]

followed by the IKE_AUTH exchange where the IKEv2 gateway proposes a mutual EAP-TTLS only authentication:

Nov 29 07:39:22 merthyr charon: 06[IKE] establishing CHILD_SA home
Nov 29 07:39:22 merthyr charon: 06[ENC] generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr SA TSi TSr N(MOBIKE_SUP) N(ADD_4_ADDR) N(ADD_4_ADDR) N(ADD_4_ADDR) N(EAP_ONLY) ]
Nov 29 07:39:22 merthyr charon: 06[NET] sending packet: from 192.168.0.254[4500] to 192.168.0.1[4500]
Nov 29 07:39:22 merthyr charon: 10[NET] received packet: from 192.168.0.1[4500] to 192.168.0.254[4500]
Nov 29 07:39:22 merthyr charon: 10[ENC] parsed IKE_AUTH response 1 [ IDr EAP/REQ/TTLS ]
Nov 29 07:39:22 merthyr charon: 10[IKE] server requested EAP_TTLS authentication (id 0xA8)
Nov 29 07:39:22 merthyr charon: 10[TLS] EAP_TTLS version is v0
Nov 29 07:39:22 merthyr charon: 10[IKE] allow mutual EAP-only authentication

The IKEv2 EAP-TLS tunnel is set up with certificate-based server authentication

Nov 29 07:39:22 merthyr charon: 10[ENC] generating IKE_AUTH request 2 [ EAP/RES/TTLS ]
Nov 29 07:39:22 merthyr charon: 10[NET] sending packet: from 192.168.0.254[4500] to 192.168.0.1[4500]
Nov 29 07:39:22 merthyr charon: 05[NET] received packet: from 192.168.0.1[4500] to 192.168.0.254[4500]
Nov 29 07:39:22 merthyr charon: 05[ENC] parsed IKE_AUTH response 2 [ EAP/REQ/TTLS ]
Nov 29 07:39:22 merthyr charon: 05[ENC] generating IKE_AUTH request 3 [ EAP/RES/TTLS ]
Nov 29 07:39:22 merthyr charon: 05[NET] sending packet: from 192.168.0.254[4500] to 192.168.0.1[4500]
Nov 29 07:39:22 merthyr charon: 15[NET] received packet: from 192.168.0.1[4500] to 192.168.0.254[4500]
Nov 29 07:39:22 merthyr charon: 15[ENC] parsed IKE_AUTH response 3 [ EAP/REQ/TTLS ]
Nov 29 07:39:22 merthyr charon: 15[TLS] negotiated TLS version TLS 1.2 with suite TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
Nov 29 07:39:22 merthyr charon: 15[TLS] received TLS server certificate 'C=CH, O=Linux strongSwan, CN=moon.strongswan.org'
Nov 29 07:39:22 merthyr charon: 15[CFG]   using certificate "C=CH, O=Linux strongSwan, CN=moon.strongswan.org" 
Nov 29 07:39:22 merthyr charon: 15[CFG]   using trusted ca certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA" 
Nov 29 07:39:22 merthyr charon: 15[CFG] checking certificate status of "C=CH, O=Linux strongSwan, CN=moon.strongswan.org" 
Nov 29 07:39:22 merthyr charon: 15[CFG]   fetching crl from 'http://crl.strongswan.org/strongswan.crl' ...
Nov 29 07:39:22 merthyr charon: 15[CFG]   using trusted certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA" 
Nov 29 07:39:22 merthyr charon: 15[CFG]   crl correctly signed by "C=CH, O=Linux strongSwan, CN=strongSwan Root CA" 
Nov 29 07:39:22 merthyr charon: 15[CFG]   crl is valid: until Dec 02 09:19:24 2011
Nov 29 07:39:22 merthyr charon: 15[CFG] certificate status is good
Nov 29 07:39:22 merthyr charon: 15[CFG]   reached self-signed root ca with a path length of 0
Nov 29 07:39:22 merthyr charon: 15[ENC] generating IKE_AUTH request 4 [ EAP/RES/TTLS ]
Nov 29 07:39:22 merthyr charon: 15[NET] sending packet: from 192.168.0.254[4500] to 192.168.0.1[4500]