Title

  Test IKEv2.EN.R.1.2.4.1: Sending NO_PROPOSAL_CHOSEN for CREATE_CHILD_SA
  Part A: (BASIC)


Purpose

  To verify an IKEv2 device properly handles CREATE_CHILD_SA request with an
  unacceptable SA payload.


References

  * [RFC 4306] - Sections 2.7 and 3.10.1
  * [RFC 4718] - Sections 2.1 and 2.2


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)
    |                    |
    |<-------------------| CREATE_CHILD_SA request (HDR, SK {N, N+, SA, Ni, TSi, TSr})
    |                    | (Packet #3)
    |---------X          | CREATE_CHILD_SA response (HDR, SK {N+, SA, Nr, TSi, TSr})
    |                    |   or 
    |------------------->| CREATE_CHILD_SA response (HDR, SK {N(NO_PROPOSAL_CHOSEN)})
    |                    | (Judgement #3)
    |                    |
    V                    V

N: REKEY_SA N+: USE_TRANSPORT_MODE
Packet #1 See Common Packet #1
Packet #2 See Common Packet #3
Packet #3 See below


* Packet #3: CREATE_CHILD_SA request
IPv6 Header Same as the Common Packet #13
UDP Header Same as the Common Packet #13
IKEv2 Header Same as the Common Packet #13
E Payload Same as the Common Packet #13
N Payload Same as the Common Packet #13
N Payload Same as the Common Packet #13
SA Payload Other fields are same as the common packet #13
SA Proposals See below
Ni, Nr Payload Same as the Common Packet #13
TSi Payload Same as the Common Packet #13
TSr Payload Same as the common packet #13


Proposal #1 SA Proposal Next Payload 0 (last)
Reserved 0
Proposal Length 36
Proposal # 1
Proposal ID 3 (ESP)
SPI Size 4
# of Transforms 3
SPI any
SA Transform Next Payload 3 (more)
Reserved 0
Transform Length 8
Transform Type 1 (ENCR)
Reserved 0
Transform ID 12 (AES_CBC)
SA Transform Next Payload 3 (more)
Reserved 0
Transform Length 8
Transform Type 3 (INTEG)
Reserved 0
Transform ID 5 (AES_XCBC_96)
SA Transform Next Payload 0 (last)
Reserved 0
Transform Length 8
Transform Type 5 (ESN)
Reserved 0
Transform ID 1 (ESN)
  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 trasmits an IKE_AUTH
          request to the NUT.
       4. Observe the messages transmitted on Link A.
       5. TN1 transmits a CREATE_CHILD_SA request to rekey the established CHILD_SAs to the
          NUT. The CREATE_CHILD_SA request includes a SA payload with a proposal unaccepted
          by the NUT.
       6. 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 does not transmit a CREATE_CHILD_SA response or transmits a
      CREATE_CHILD_SA response including a Notify payload of type
      NO_PROPOSAL_CHOSEN.


Possible Problems

  * None.