Title

  Test IKEv2.EN.R.1.1.6.1: Cryptographic Algorithm Negotiation for IKE_SA
  Part B: Encryption Algorithm ENCR_AES_CTR (ADVANCED)


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 E, configure the devices according to the Common
      Configuration except for Italic parameters.
IKE_SA_INIT exchanges Algorithms
Encryption PRF Integrity D-H Group
Part B ENCR_AES_CTR PRF_HMAC_SHA1 AUTH_HMAC_SHA1_96 Group 2

  * 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)
    |                    |
    V                    V

N: USE_TRANSPORT_MODE
Packet #1 See Common Packet #1
Packet #2 See Common Packet #3

  Packet #1: IKE_SA_INIT requet
         Packet #1 is same as Common Packet #1 except SA Transform proposed in each test.
Part B: SA Transform of Tranform Type ENCR is replaced by the following SA Transfrom.

SA Transform Next Payload 3 (more)
Reserved 0
Transform Length 8
Transform Type 1 (ENCR)
Reserved 0
Transform ID 13 (AES_CBC)
SA Attribute Attribute Type 14 (Key Length)
Attribute Value 128

  Part B: Encryption Algorithm ENCR_AES_CTR (ADVANCED)
       5. TN1 starts to negotiate with NUT by sending IKE_SA_INIT request including a SA payload
          as described above.
       6. Observe the messages transmitted on Link A.
       7. After reception of IKE_SA_INIT response from the NUT, TN transmits an IKE_AUTH
          request protected with the accepted proposal to the NUT.
       8. Observe the messages transmitted on Link A.


Observable Result

  Part B
    Step 6: Judgment #1
      The NUT transmits an IKE_SA_INIT response including "ENCR_AES_CTR",
      "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as accepted
      algorithms.
  
    Step 8: Judgment #2
      The NUT transmits an IKE_AUTH response including "ENCR_3DES",
      "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as accepted
      algorithms.


Possible Problems

  * None.