Title

  Test IKEv2.EN.R.1.1.5.3: Interaction of COOKIE and INVALID_KE_PAYLOAD
  Part A: (ADVANCED)


Purpose

  To verify an IKEv2 device handles interaction of COOKIE and INVALID_KE_PAYLOAD.


References

  * [RFC 4306] - Sections 2.6 and 3.10.1
  * [RFC 4718] - Sections 2.2, 2.4 and 2.5


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), SAi1, KEi, Ni)
    |                    | (Packet #3)
    |------------------->| IKE_SA_INIT response (HDR, N(INVALID_KE_PAYLOAD))
    |                    | (Judgement #2)
    |                    |
    |<-------------------| IKE_SA_INIT request (HDR, N(COOKIE), SAi1, KEi', Ni)
    |                    | (Packet #4)
    |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #3)
    |                    |
    V                    V
Packet #1 See Common Packet #1
Packet #2 See Common Packet #1
Packet #3 See below
Packet #4 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 Other fields are same as the common packet #1
DH Group # 14
Ni, Nr Payload Same as the common packet #1
* Packet #4: 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: (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. The IKE_SA_INIT
         requests include an invalid KE payload which has different .DH Group # from proposing
         DH Group #.
     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. The
         IKE_SA_INIT still has an invalid KE payload.
     5. Observe the messages transmitted on Link A.
     6. After reception of IKE_SA_INIT response with a Notify payload of type
         INVALID_KE_PAYLOAD, TN1 transmits an IKE_SA_INIT request with a Notify payload
         of type COOKIE and a valid KE payload.
     7. Observe the messages transmitted on Link A.


Observable Result

  Part A
       Step 3: Judgment #1
       The NUT transmits an IKE_SA_INIT response including an IKE Header which contains zero
       as IKE_SA Responder's SPI field and a Notify payload of type COOKIE.
       Step 5: Judgment #2
       The NUT transmits an IKE_SA_INIT response including an IKE Header which contains zero
       as IKE_SA Responder's SPI field and a Notify payload of type INVALID_KE_PAYLOAD.
       Step 7: Judgment #3
       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.