Title

  Test IKEv2.EN.I.1.2.3.5: Sending Multiple Proposal
  Part A: (ADVANCED)

Purpose

  To verify an IKEv2 device properly transmits CREATE_CHILD_SA request with multiple
  proposals 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
	Proposal	ProtocolID	Encryption	Integrity	ESN
Part A	Proposal #1	ESP	ENCR_3DES	AUTH_HMAC_SHA1_96	No ESN
	Proposal #2	ESP	ENCR_AES_CBC	AUTH_AES_XCBC_96	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 A: (ADVANCED)
     1. NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
     2. Observe the messages transmitted on Link A.
     3. TN1 responds with an IKE_SA_INIT response to the NUT.
     4. Observe the messages transmitted on Link A.
     5. After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
         response to the NUT
     6. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
     7. Observe the messages transmitted on Link A.
     8. Repeat Steps 6 and 7 until lifetime of SA is expired for 30 seconds.
     9. Observe the messages transmitted on Link A.

Observable Result

  Part A
       Step 2: 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 4: 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 7: Judgment #3
       The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.

       Step 9: Judgment #4
       The NUT transmits a CREATE_CHILD_SA request including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" in SA Proposal #1
       (ESP) and then "ENCR_AES_CBC", "AUTH_AES_XCBC_96" and "Extended Sequence
       Numbers" in SA Proposal #2 (ESP) as accepted algorithms.

Possible Problems

  * Each NUT has the different lifetime of SA.