Title

  Test IKEv2.EN.I.1.1.7.1: Narrowing the range of members of the set of traffic selectors
  Part A (BASIC)

Purpose

  To verify an IKEv2 device allows the responder to choose a subset of the traffic proposed by
  the initiator.

References

  * [RFC4306] - Section 2.9

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)
    |                    | (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 {TCP SYN}
    |                    | (Packet #3)
    |------------------->| IPSec {TCP RST}
    |                    | (Judgement #3)  
    |                    |                
    |<-------------------| IPsec {ICMPv6 Echo Request} 
    |                    | (Packet #4)
    |---------X          | IPsec {ICMPv6 Echo Reply} 
    |                    | (Judgement #4)
    |                    |
    V                    V
 
 N: USE_TRANSPORT_MODE

Packet #1	See Common Packet #2
Packet #2	See below
Packet #3	See below
Packet #4	See Common Packet #19

Packet #2: IKE_AUTH response

TSi Payload
	Traffic Selector	TS Type	8 (IPV6_ADDR_RANGE)
		IP Protocol ID	6 (tcp)
		Selector Length	40
		Start Port	0
		End Port	65535
		Starting Address	TN1's Global Address on Link X
		Ending Address	TN1's Global Address on Link X

TSr Payload
	Traffic Selector	TS Type	8 (IPV6_ADDR_RANGE)
		IP Protocol ID	6 (tcp)
		Selector Length	40
		Start Port	0
		End Port	65535
		Starting Address	NUT's Global Address on Link A
		Ending Address	NUT's Global Address on Link A

Packet #3: TCP-SYN

IPv6 Header	Source Address	TN1's Global Address on Link X
	Destination Address	NUT's Global Address on Link A
ESP	Security Parameter Index	CHILD_SA's SPI value used by this message
	Sequence Number	The value incremented the previous encrypted packet's Sequence Number by one.
	Payload Data	Subsequent data encrypted by underlying encryption algorithm
	Padding	Any value which to be a multiple of the encryption block size
	Pad Length	The length of the Padding field
	Next Header	6 (TCP)
	Integrity Check Value	The cryptographic checksum of the entire message
TCP Header	Source Port	500
	Destination Port	500
	Flags	SYN (0x02)

  Part A (BASIC)
       1. NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
       2. Observe the messages transmitted on Link A.
       3. TN1 responds with an IKE_SA_INIT response to the NUT.
       4. Observe the messages transmitted on Link A.
       5. After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
          response to the NUT.
       6. TN1 transmits a TCP-SYN packet with IPsec ESP using corresponding algorithms to closed
          port on NUT.
       7. Observe the messages transmitted on Link A.
       8. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
       9. Observe the messages transmitted on Link A.

Observable Result

  Part A
    Step 2: 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
      algorithms.
  
    Step 4: Judgment #2
      The NUT transmits an IKE_AUTH request including "ENCR_3DES",
      "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed algorithms.
  
    Step 7: Judgment #3
      The NUT transmits a TCP-RST packet with IPsec ESP using corresponding algorithms.
  
    Step 9: Judgment #4
      The NUT never transmit an Echo Reply with IPsec ESP using corresponding algorithms.

Possible Problems

  * None.