Title

  Test IKEv2.EN.R.1.2.6.1: Sending CREATE_CHILD_SA response
  Part A: (BASIC)


Purpose

  To verify an IKEv2 device properly handles CREATE_CHILD_SA Excahnge to rekey IKE_SA.


References

  * [RFC 4306] - Sections 2.8 and 2.18


Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      In each part, configure the devices according to the Common Configuration.
  * 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)
    |                    | (Packet #1)
    |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #1)
    |                    |
    |<-------------------| IKE_AUTH request (HDR, SK {IDi, AUTH, N, SAi2, TSi, TSr})
    |                    | (Packet #2)
    |------------------->| IKE_AUTH response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (Judgement #2)
    |                    |
    |<-------------------| IPsec {Echo Request}
    |                    | (Packet #3)
    |------------------->| IPsec {Echo Reply}
    |                    | (Judgement #3)
    |                    |
    |<-------------------| CREATE_CHILD_SA request (HDR, SK {SA, Ni})
    |                    | (Packet #4)
    |------------------->| CREATE_CHILD_SA response (HDR, SK {SA, Nr})
    |                    | (Judgement #4)
    |                    |
    V                    V

N: USE_TRANSPORT_MODE
Packet #1 See Common Packet #1
Packet #2 See Common Packet #3
Packet #3 See Common Packet #19
Packet #4 See Common Packet #11

  Part A: (BASIC)
     1. TN1 starts to negotiate with NUT by sending IKE_SA_INIT request.
     2. Observe the messages transmitted on Link A.
     3. After reception of IKE_SA_INIT response from the NUT, TN1 transmits an IKE_AUTH
         request to the NUT.
     4. Observe the messages transmitted on Link A.
     5. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
     6. Observe the messages transmitted on Link A.
     7. TN1 transmits a CREATE_CHILD_SA request including a SA payload. A proposal in the
         SA payload contains 1 (IKE) in the Protocol ID field, 8 in the SPI size field and the rekeyed
         IKE_SA's initiator's SPI value.
     8. Observe the messages transmitted on Link A.


Observable Result

  Part A
       Step 2: Judgment #1
       The NUT transmits an IKE_SA_INIT response including "ENCR_3DES",
       "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as accepted
       algorithms.
       Step 4: Judgment #2
       The NUT transmits an IKE_AUTH response including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as accepted algorithms.
       Step 6: Judgment #3
       The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.
       Step 8: Judgment #4
       The NUT transmits a CREATE_CHILD_SA response including "ENCR_3DES",
       "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as proposed
       algorithms. And the proposal in the SA payload Response includes 1 (IKE) in the Protocol ID
       field, 8 in the SPI size field and rekeyed IKE_SA's responder's SPI value in the SPI field.


Possible Problems

  * Each NUT has the different lifetime of SA.