NAME

  S_RFC3315_21.4.2_MD5Mismatch.seq - Validate incoming message's MAC 

TARGET

  Server

SYNOPSIS

  S_RFC3315_21.4.2_MD5Mismatch.seq[-tooloption ...]
  -pkt S_RFC3315_21.4.2_MD5Mismatch.def
  -tooloption: v6eval tool option. See also DHCPv6.def

INITIALIZATION

• Network Topology

          TN(Client1)  
             |
Link0 -------+-----------+--------------- 3ffe:501:ffff:100::/64
                         |
                       NUT(Server1)
  

• Verification Points

  To validate an incoming message, the receiver first checks that the
  value in the replay detection field is acceptable according to the
  replay detection method specified by the RDM field.  Next, the
  receiver computes the MAC as described in [8].  The entire DHCP
  message (setting the MAC field of the authentication option to 0) is
  used as input to the HMAC-MD5 computation function.  If the MAC
  computed by the receiver does not match the MAC contained in the
  authentication option, the receiver MUST discard the DHCP message.
  

• Configuration



Enable Delayed Authenticaion Protocol Service Authenticaion parameter
• DHCP realm: DHCPv6.TEST.EXAMPLE.COM
• Client DUID: 00:01:00:01:00:04:93:e0:00:00:00:00:a2:a2
• Key id: 1
• Shared secret key: TAHITEST_VALID12



Device Name	Device Type	I/F	Assigned Prefix	Link Local Addr	MAC Addr
Server1	NUT	Link0	3ffe:501:ffff:100::/64	NUT's Linklocal address	NUT's MAC address
Client1	TN	Link0	3ffe:501:ffff:100::/64	fe80::200:ff:fe00:a2a2	00:00:00:00:a2:a2

TEST PROCEDURE

       NUT     TN
        |       | 
        |       | initialize NUT (as a DHCPv6 Server)
        |       | 
        | <---- | Solicit w/ Authtication Option
        | ----> | Advertise w/ Authtication Option
        | <---- | Request w/ Authtication Option including invalid MAC
        | --->X | Reply w/ Authtication Option (*1)
        |       | 

JUDGEMENT

  (*1) PASS: If NUT received the message that includes invalid MAC, NUT discards it.

TERMINATION

   N/A

REFERENCE

  see also RFC3315
  21.4.2. Message Validation
  22.11 Authentication Option

SEE ALSO

   perldoc V6evalTool