Endpoint Compliance via PT-EAP Protocol¶

• Table of contents
• Endpoint Compliance via PT-EAP Protocol
  • Starting the strongSwan Policy Decision Point (PDP)
  • PT-EAP Connection by Access Requestor dave transported over EAP-RADIUS

Starting the strongSwan Policy Decision Point (PDP)¶

The strongSwan PDP starts and loads its server certificate and the client credentials

00[DMN] Starting IKE charon daemon (strongSwan 5.2.1dr1, Linux 3.16.1, x86_64)
00[LIB] openssl FIPS mode(0) - disabled 
00[CFG] loading ca certificates from '/etc/ipsec.d/cacerts'
00[CFG]   loaded ca certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA" from '/etc/ipsec.d/cacerts/strongswanCert.pem'
00[CFG] loading aa certificates from '/etc/ipsec.d/aacerts'
00[CFG] loading ocsp signer certificates from '/etc/ipsec.d/ocspcerts'
00[CFG] loading attribute certificates from '/etc/ipsec.d/acerts'
00[CFG] loading crls from '/etc/ipsec.d/crls'
00[CFG] loading secrets from '/etc/ipsec.secrets'
00[CFG]   loaded RSA private key from '/etc/ipsec.d/private/aaaKey.pem'
00[CFG]   loaded EAP secret for carol
00[CFG]   loaded EAP secret for dave 

Next the OS and SWID IMVs are loaded

00[TNC] TNC recommendation policy is 'default'
00[TNC] loading IMVs from '/etc/tnc_config'
00[TNC] added IETF attributes
00[TNC] added ITA-HSR attributes
00[TNC] added TCG attributes
00[LIB] libimcv initialized
00[IMV] IMV 1 "OS" initialized
00[TNC] IMV 1 supports 1 message type: 'IETF/Operating System' 0x000000/0x00000001
00[TNC] IMV 1 "OS" loaded from '/usr/local/lib/ipsec/imcvs/imv-os.so'
00[IMV] IMV 2 "SWID" initialized
00[TNC] IMV 2 supports 1 message type: 'TCG/SWID' 0x005597/0x00000003
O00[TNC] IMV 2 "SWID" loaded from '/usr/local/lib/ipsec/imcvs/imv-swid.so'

The PDP loads all plugins needed to communicate via its EAP-RADIUS and PT-TLS interfaces and spawns 16 worker threads

00[IKE] eap method EAP_TTLS selected
00[LIB] loaded plugins: charon aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 curl revocation hmac socket-default kernel-netlink stroke eap-identity eap-ttls eap-md5 eap-tnc tnc-pdp tnc-imv tnc-tnccs tnccs-20 sqlite
00[JOB] spawning 16 worker threads
09[CFG] received stroke: add connection 'aaa'
09[CFG] left nor right host is our side, assuming left=local
09[CFG]   loaded certificate "C=CH, O=Linux strongSwan, CN=aaa.strongswan.org" from 'aaaCert.pem'
09[CFG] added configuration 'aaa'

PT-EAP Connection by Access Requestor dave transported over EAP-RADIUS¶

04[CFG] received RADIUS Access-Request from client '10.1.0.1'
04[CFG] created RADIUS connection for user 'dave' NAS 'strongSwan'
04[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
11[CFG] received RADIUS Access-Request from client '10.1.0.1'
11[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'

Set up an EAP-TTLS connection between AR and PDP

11[TLS] negotiated TLS 1.2 using suite TLS_DHE_RSA_WITH_AES_128_CBC_SHA
11[TLS] sending TLS server certificate 'C=CH, O=Linux strongSwan, CN=aaa.strongswan.org'
11[TLS] sending TLS cert request for 'C=CH, O=Linux strongSwan, CN=strongSwan Root CA'

11[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
12[CFG] received RADIUS Access-Request from client '10.1.0.1'
12[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'
12[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
13[CFG] received RADIUS Access-Request from client '10.1.0.1'
13[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'
13[IKE] sending tunneled EAP-TTLS AVP [EAP/REQ/ID]
13[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
14[CFG] received RADIUS Access-Request from client '10.1.0.1'
14[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'

Received EAP-Identity of AR dave

14[IKE] received tunneled EAP-TTLS AVP [EAP/RES/ID]
14[IKE] received EAP identity 'dave'
14[IKE] phase2 method EAP_MD5 selected
14[IKE] sending tunneled EAP-TTLS AVP [EAP/REQ/MD5]

14[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
03[CFG] received RADIUS Access-Request from client '10.1.0.1'
03[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'

EAP-MD5 based authentication of AR dave

03[IKE] received tunneled EAP-TTLS AVP [EAP/RES/MD5]
03[IKE] EAP_TTLS phase2 authentication of 'dave' with EAP_MD5 successful
03[IKE] phase2 method EAP_PT_EAP selected
03[IKE] sending tunneled EAP-TTLS AVP [EAP/REQ/PT]

03[CFG] sending RADIUS Access-Challenge to client '10.1.0.1'
15[CFG] received RADIUS Access-Request from client '10.1.0.1'
15[CFG] found RADIUS connection for user 'dave' NAS 'strongSwan'

Upon reception of the first PB-TNC client batch, open an IF-TNCCS 2.0 connection

15[IKE] received tunneled EAP-TTLS AVP [EAP/RES/PT]
15[IMV] IMV 1 "OS" created a state for IF-TNCCS 2.0 Connection ID 1: +long +excl -soh
15[IMV]   over IF-T for Tunneled EAP 2.0 with maximum PA-TNC message size of 65490 bytes
15[IMV]   user AR identity 'dave' authenticated by password
15[IMV] IMV 2 "SWID" created a state for IF-TNCCS 2.0 Connection ID 1: +long +excl -soh
15[IMV]   over IF-T for Tunneled EAP 2.0 with maximum PA-TNC message size of 65490 bytes
15[IMV]   user AR identity 'dave' authenticated by password
15[IMV] IMV 1 "OS" changed state of Connection ID 1 to 'Handshake'
15[IMV] IMV 2 "SWID" changed state of Connection ID 1 to 'Handshake'

15[TNC] received TNCCS batch (91 bytes) for Connection ID 1
15[TNC] PB-TNC state transition from 'Init' to 'Server Working'
15[TNC] processing PB-TNC CDATA batch
15[TNC] processing IETF/PB-PA message (52 bytes)
15[TNC] setting language preference to 'en'

Received an Attribute Size Request for the TCG/SWID PA message subtype from the SWID IMC

15[TNC] handling PB-PA message type 'TCG/SWID' 0x005597/0x00000003
15[IMV] IMV 2 "SWID" received message for Connection ID 1 from IMC 2
15[IMV] => 28 bytes @ 0x7a5490
15[IMV]    0: 01 00 00 00 26 4B C3 0A 00 00 55 97 00 00 00 21  ....&K....U....!
15[IMV]   16: 00 00 00 14 05 F5 E1 00 00 00 7F A6              ............
15[TNC] processing PA-TNC message with ID 0x264bc30a
15[TNC] processing PA-TNC attribute type 'TCG/Max Attribute Size Request' 0x005597/0x00000021
15[IMV] received a segmentation contract from IMC 2 for PA message type 'TCG/SWID' 0x005597/0x00000003
15[IMV]   maximum attribute size of 100'000'000 bytes with maximum segment size of 32678 bytes

Sending an Attribute Size Response for the TCG/SWID PA message subtype back to the SWID IMC

15[TNC] creating PA-TNC message with ID 0x45425ec5
15[TNC] creating PA-TNC attribute type 'TCG/Max Attribute Size Response' 0x005597/0x00000022
15[IMV] created PA-TNC message: => 28 bytes @ 0x7a5b00
15[IMV]    0: 01 00 00 00 45 42 5E C5 00 00 55 97 00 00 00 22  ....EB^...U...." 
15[IMV]   16: 00 00 00 14 05 F5 E1 00 00 00 7F A6              ............
15[TNC] creating PB-PA message type 'TCG/SWID' 0x005597/0x00000003

Sending an Attribute Size Request for the IEto any IMC subscribing to the IETF/Oper
15[IMV] IMV 1 requests a segmentation contract for PA message type 'IETF/Operating System' 0x000000/0x00000001
15[IMV] maximum attribute size of 100000000 bytes with maximum segment size of 65446 bytes
Oct 6 20:49:27 alice charon: 15[TNC] creating PA-TNC message with ID 0x2ae6641f
Oct 6 20:49:27 alice charon: 15[TNC] creating PA-TNC attribute type 'TCG/Max Attribute Size Request' 0x005597/0x00000021
Oct 6 20:49:27 alice charon: 15[TNC] creating PA-TNC attribute type 'IETF/Attribute Request' 0x000000/0x00000001
Oct 6 20:49:27 alice charon: 15[IMV] created PA-TNC message: => 96 bytes @ 0x7a7ff0
Oct 6 20:49:27 alice charon: 15[IMV] 0: 01 00 00 00 2A E6 64 1F 00 00 55 97 00 00 00 21 ....*.d...U....!
Oct 6 20:49:27 alice charon: 15[IMV] 16: 00 00 00 14 05 F5 E1 00 00 00 FF A6 00 00 00 00 ................
Oct 6 20:49:27 alice charon: 15[IMV] 32: 00 00 00 01 00 00 00 44 00 00 00 00 00 00 00 02 .......D........
Oct 6 20:49:27 alice charon: 15[IMV] 48: 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 03 ................
Oct 6 20:49:27 alice charon: 15[IMV] 64: 00 00 00 00 00 00 00 05 00 00 00 00 00 00 00 0B ................
Oct 6 20:49:27 alice charon: 15[IMV] 80: 00 00 00 00 00 00 00 0C 00 00 90 2A 00 00 00 08 ...........*....
Oct 6 20:49:27 alice charon: 15[TNC] creating PB-PA message type 'IETF/Operating System' 0x000000/0x00000001
Oct 6 20:49:27 alice charon: 15[TNC] PB-TNC state transition from 'Server Working' to 'Client Working'
Oct 6 20:49:27 alice charon: 15[TNC] creating PB-TNC SDATA batch
Oct 6 20:49:27 alice charon: 15[TNC] adding TCG/PB-PDP-Referral message
Oct 6 20:49:27 alice charon: 15[TNC] adding IETF/PB-PA message
Oct 6 20:49:27 alice charon: 15[TNC] adding IETF/PB-PA message
Oct 6 20:49:27 alice charon: 15[TNC] sending PB-TNC SDATA batch (222 bytes) for Connection ID 1
Oct 6 20:49:27 alice charon: 15[IKE] sending tunneled EAP-TTLS AVP [EAP/REQ/PT]