Title

  Test IKEv2.EN.R.1.1.5.1: Cookies
  Part A: Notify payload of type Cookie Format (ADVANCED)


Purpose

  To verify an IKEv2 device transmits IKE_SA_INIT response with a Notify payload of type
  COOKIE.


References

  * [RFC 4306] - Sections 2.6 and 3.10.1
  * [RFC 4718] - Sections 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.
  * Pire-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 request (HDR, SAi1, KEi, Ni)
    |                    | (Packet #2)
    |                    |
    |------------------->| IKE_SA_INIT response (HDR, N(COOKIE))
    |                    | (Judgement #1)
    |                    |
    |<-------------------| IKE_SA_INIT request (HDR, N(COOKIE), SAi2, KEi, Ni)
    |                    | (Packet #3)
    |------------------->| IKE_SA_INIT 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 #1
Packet #3 See below
* Packet #3: IKE_SA_INIT request packet
IPv6 Header Same as the Common Packet #1
UDP Header Same as the Common Packet #1
IKEv2 Header >Other fields are same as the Common Packet #1
Next Payload 41 (N)
N Payload Next Payload 33 (SA)
Critical 0
Reserved 0
Payload Length Any
Protocol ID 0
SPI Size 0
Notify Message Type COOKIE (16390)
Notification Data The same value as COOKIE in IKE_SA_INIT response sent by NUT
SA Payload Same as the Common Packet #1
KE Payload Same as the Common Packet #1
Ni, Nr Payload Same as the common packet #1
  Part A: Notify payload of type Cookie Format (ADVANCED)
     1. TN1 starts to negotiate with NUT by sending IKE_SA_INIT request.
     2. TN1 transmits a large number of IKE_SA_INIT requests to the NUT.
     3. Observe the messages transmitted on Link A.
     4. After reception of IKE_SA_INIT response with a Notify payload of type COOKIE, TN1
         transmits an IKE_SA_INIT request which includes a Notify payload of type COOKIE with
         the cookie data supplied by NUT
     5. Observe the messages transmitted on Link A.


Observable Result

  Part A
       Step 3: Judgment #1
       The NUT transmits an IKE_SA_INIT response including a IKE Header which contains zero
       as IKE_SA Responder's SPI field and a Notify payload of type COOKIE containing
       following values:.
                          1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      ! Next Payload  !C!  RESERVED   !         Payload Length        !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !  Protocol ID  !   SPI Size    !      Notify Message Type      !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                                                               !
      ~                Security Parameter Index (SPI)                 ~
      !                                                               !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      !                                                               !
      ~                       Notification Data                       ~
      !                                                               !
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 72 Notify Payload format

* A Next Payload field is set to SA Payload (33). * A Critical field is set to zero. * A RESERVED field is set to zero. * A Payload Length field is set to length of the current payload. * A SPI Size field is set to zero. * A Notify Message Type field is set to COOKIE (16390). * A Notification Data field is set to the cookie data.
      Step 5: Judgment #2
      The NUT transmits an IKE_SA_INIT response including "ENCR_3DES",
      "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as proposed
      algorithms.


Possible Problems


  * None.