Title

  Test IKEv2.EN.I.1.1.6.2: Cryptographic Algorithm Negotiation for CHILD_SA
  Part F: Extended Sequence Numbers (ADVANCED)

Purpose

  To verify an IKEv2 device properly handles the Initial Exchanges using Pre-Shared key.

References

  * [RFC 4306] - Sections 2.7 and 3.3

Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      From part A to part F, configure the devices according to the Common
      Configuration except for Italic parameters.

	IKE_AUTH exchanges Algorithms
	Encryption	Integrity	Extended Sequence Numbers
Part F	ENCR_3DES	AUTH_HMAC_SHA1_96	Extended Sequence Numbers

  * 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}
    |                    | (Judgement #3)
    |                    |
    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 F: Extended Sequence Numbers (ADVANCED)
      36. NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
      37. Observe the messages transmitted on Link A.
      38. TN1 responds with an IKE_SA_INIT response to the NUT.
      39. Observe the messages transmitted on Link A.
      40. After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
          response to the NUT
      41. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
      42. Observe the messages transmitted on Link A.

Observable Result

  Part F
    Step 37: 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
      lgorithms.
  
    Step 30: Judgment #2
      The NUT transmits an IKE_AUTH request including "ENCR_3DES",
      "AUTH_HMAC_SHA1" and "Extended Sequence Numbers" as proposed algorithms.
  
    Step 42: Judgment #3
      The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.

Possible Problems

  * None.