Title

  Test IKEv2.EN.I.1.2.3.4: Sending Multiple Transform
  Part C: Multiple Extended Sequecnce Numbers (ADVANCED)


Purpose

  To verify an IKEv2 device properly transmits CREATE_CHILD_SA request with multiple
  transforms to rekey CHILD_SA.


References

  * [RFC 4306] - Sections 2.7 and 3.3


Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      In each part, configure the devices according to the following configuration:
CREATE_CHILD_SA exchanges Algorithms
Encryption Integrity ESN
Part C ENCR_3DES AUTH_HMAC_SHA1_96 No ESN
ESN
  * Pre-Sequence and Cleanup Sequence
      IKEv2 on the NUT is disabled after each part.


Procedure

   NUT                  TN1
(End-Node)           (End-Node)
    |                    |
    |------------------->| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Judgement #1)
    |<-------------------| IKE_SA_INIT Response (HDR, SAr1, KEr, Nr)
    |                    | (Packet #1)
    |                    |
    |------------------->| IKE_AUTH request (HDR, SK {IDi, AUTH, N+, SAi2, TSi, TSr})
    |                    | (Judgement #2)
    |<-------------------| IKE_AUTH Response (HDR, SK {IDr, AUTH, N+, SAr2, TSi, TSr})
    |                    | (Packet #2)
    |                    |
   ---                  ---
    |                    |                        ---
    |<-------------------| IPSec {Echo Request}    |
    |                    | (Packet #3)             |
    |------------------->| IPSec {Echo Reply}      | repeat Echo exchange until lifetime of SA is expired
    |                    | (Judgement #3)          |
    |                    |                        ---
   ---                  ---
    |                    |
    |------------------->| CREATE_CHILD_SA request (HDR, SK {N, N+, SA, Ni, TSi, TSr})
    |                    | (Judgement #4)
    |                    |
    V                    V

 N: REKEY_SA
 N+: USE_TRANSPORT_MODE
Packet #1 See Common Packet #2
Packet #2 See Common Packet #4
Packet #3 See Common Packet #19
  Part C: Multiple Extended Sequecnce Numbers (ADVANCED)
     19. NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
     20. Observe the messages transmitted on Link A.
     21. TN1 responds with an IKE_SA_INIT response to the NUT.
     22. Observe the messages transmitted on Link A.
     23. After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
         response to the NUT
     24. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
     25. Observe the messages transmitted on Link A.
     26. Repeat Steps 24 and 25 until lifetime of SA is expired for 30 seconds.
     27. Observe the messages transmitted on Link A.


Observable Result

  Part C
       Step 20: Judgment #1
       The NUT transmits an IKE_SA_INIT request including "ENCR_3DES",
       "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as proposed
       algorithms.
       Step 22: Judgment #2
       The NUT transmits an IKE_AUTH request including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed algorithms.
       Step 25: Judgment #3
       The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.
       Step 27: Judgment #4
       The NUT transmits a CREATE_CHILD_SA request including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96", "No Extended Sequence Numbers" and "Extended Sequence
       Numbers" as proposed algorithms. And the CREATE_CHILD_SA request includes a Notify
       payload of type REKEY_SA containing rekeyed CHILD_SA's SPI value in the SPI field.


Possible Problems

  * Each NUT has the different lifetime of SA.