Title

  Test IKEv2.EN.R.1.1.2.2: Receipt of retransmitted IKE_AUTH request
  Part A: (BASIC)


Purpose

  To verify an IKEv2 device transmits an IKE_AUTH response when the device received a
  retransmitted IKE_AUTH request.


References

  * [RFC 4306] - Sections 2.1, 2.2 and 2.4


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)
    |                    |
    |                    * wait until retrans timer expires
    |---------X          | IKE_AUTH response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (Judgement #3)
    |                    |
    |<-------------------| IKE_AUTH request (HDR, SK {IDi, AUTH, N, SAi2, TSi, TSr})
    |                    | (Packet #3)
    |------------------->| IKE_AUTH response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (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 #3
(The Message ID is the same as Packet #1)
  Part A: (BASIC)
       1. TN starts to negotiate with NUT by sending IKE_SA_INIT request.
       2. Observe the messages transmitted on Link A.
       3. After reception of an 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. Observe the messages transmitted on Link A.
       6. TN1 retransmits the same IKE_AUTH request as the request transmitted in Step 3 to the
          NUT.
       7. 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 5: Judgment #3
       The NUT never retransmits the same IKE_AUTH response as the response transmitted at
       Step 4.
       Step 7: Judgment #4
       The NUT transmits the same IKE_AUTH response as the response transmitted at Step 4.


Possible Problems

  * None.