Title

  Test IKEv2.EN.I.1.2.4.4: Sending Multiple Transform
  Part B: Multiple Pseudo-Random Functions (ADVANCED)

Purpose

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

References

  * [RFC 4306] - Sections 2.8

Test Setup

  * Network Topology
      Connect the devices according to the Common Topology. 
  * Configuration
      In each part, configure the devices according to the Common Configuration.
      In addition, set IKE_SA Lifetime to 60 seconds and set CHILD_SA Lifetime to 300
      seconds.

	CREATE_CHILD_SA exchanges Algorithms
	Encryption	PRF	Integrity	D-H Group
Part B	ENCR_3DES	PRF_HMAC_SHA1 PRF_AES128_CBC	AUTH_HMAC_SHA1_96	Group 2

  * 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 {SA, Ni})
    |                    | (Judgement #4)
    |                    |
    V                    V

 N: USE_TRANSPORT_MODE

Packet #1	See Common Packet #2
Packet #2	See Common Packet #4
Packet #3	See Common Packet #19

  Part B: Multiple Pseudo-Random Functions (ADVANCED)
     10. NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
     11. Observe the messages transmitted on Link A.
     12. TN1 responds with an IKE_SA_INIT response to the NUT.
     13. Observe the messages transmitted on Link A.
     14. After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
         response to the NUT
     15. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
     16. Observe the messages transmitted on Link A.
     17. Repeat Steps 6 and 7 until lifetime of SA is expired.
     18. Observe the messages transmitted on Link A.

Observable Result

  Part B
       Step 11: 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 13: 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 16: Judgment #3
       The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.

       Step 18: Judgment #4
       The NUT transmits a CREATE_CHILD_SA request including "ENCR_3DES",
       "PRF_HMAC_SHA1", "PRF_AES128_CBC", "AUTH_HMAC_SHA1_96" and "D-H group
       2" as proposed algorithms. And the CREATE_CHILD_SA request includes 1 (IKE) in the
       Protocol ID field, 8 in the SPI size field and rekeyed IKE_SA's SPI value in the SPI field.

Possible Problems

  * Each NUT has the different lifetime of SA.