Title

  Test IKEv2.EN.I.1.2.6.12: Rekeying an IKE_SA with half-closed CHILD_SAs
  Part A: (BASIC)

Purpose

  To verify an IKEv2 device properly handles a request to rekey an IKE_SA which has
  CHILD_SAs in half-closed state.

References

  * [RFC 4718] - Sections 5.11.8

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 300 seconds and set CHILD_SA Lifetime to 30
      seconds.
  * 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)
    |                    |
    |                    * wait until CHILD_SA expires
    |                    |
    |------------------->| INFORMATIONAL request (HDR, SK {D})
    |                    | (Judgement #3)
    |                    |
    |<-------------------| CREATE_CHILD_SA request (HDR, SK {SA, Ni})
    |                    | (Packet #3)
    |------------------->| CREATE_CHILD_SA response (HDR, SK {N(NO_PROPOSAL_CHOSEN)})
    |                    | (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 #11

  Part A: (BASIC)
     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. Observe the messages transmitted on Link A.
     7. TN1 transmits a CREATE_CHILD_SA request to rekey an IKE_SA to the NUT.
     8. 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 6: Judgment #3
       The NUT transmits an INFORMATIONAL request to close a CHILD_SA to the TN1.

       Step 8: Judgment #4
       The NUT responds with a CREATE_CHILD_SA response which has a Notify of type
       NO_PROPOSAL_CHOSEN to a CREATE_CHILD_SA request to rekey an IKE_SA.

Possible Problems

  * Each NUT has the different lifetime of SA.

`Packet #1`	`See Common Packet #2`
`Packet #2`	`See Common Packet #4`
`Packet #3`	`See Common Packet #11`