R_RFC2408_3_1_1_Mj_1_Mn_0 - [Responder Test]ISAKMP Header format check
End-Node
R_RFC2408_3_1_1_Mj_1_Mn_0.seq [-tooloption ...] -pkt R_RFC2408_3_1_1_Mj_1_Mn_0.def -tooloption : v6eval tool option
See also ike_common.def and ike_ipsec.def and ike_addr.def and ike_pkt_ph1_recv.def and ike_pkt_ph2_recv.def
HOST-2(TN):initiator
|3ffe:501:ffff:101::11
|
Net-y --+--------+------------------------ 3ffe:501:ffff:101::/64
|
|
ROUTER-1(TN)
|3ffe:501:ffff:100::11
|
Net-z --+--------+------------------------ 3ffe:501:ffff:100::/64
|
|3ffe:501:ffff:100:XXXX
NUT:responder
XXXX: EUI64 address
Verification Points
ISAKMP Header Format
Cookie field
The cookies MUST NOT swap places when the direction of the ISAKMP SA changes.
(The cookie must be set to Responder cookie field.)
Next Payload field
Place the value of the Next Payload in the Next Payload field.
(In this test, this field is set as 1(Security Association Payload).)
Version field
Major Version 1
Minor Version 0
Exchange Type
indicates the type of exchange being used.
(In this test, this field is set as 2(main mode).)
Flags field
Bits of the Flags field(except E,C,A bit) MUST be set to 0 prior to transmission.
|0|0|0|0|0|A|C|E|
Message ID field
During Phase 1 negotiations, the value MUST be set to 0.
Payload Length field
Place the length (in octets) of the payload in the Payload Length field.
Configuration
Initiator and Responder IKE parameter
At least, following parameter must be included in proposal.
| Machine |
Src |
Dest |
Phase I |
Phase II |
| Ex mode |
Key Value |
Enc Alg |
Hash Alg |
Auth Method |
DH Group |
PH1 Lt |
IDx |
Proto ID |
Trans ID |
Mode |
Auth Alg |
PH2 Lt |
Upper |
| NUT |
NUT addr |
HOST-2 addr |
Main |
IKE-TEST |
3DES |
SHA |
pre-shared key |
2 |
8 Hour |
NUT addr |
PROTO_IPSEC_ESP |
ESP_3DES |
Transport |
HMAC-SHA |
8 Hour |
any |
| HOST-2 |
HOST-2 addr |
NUT addr |
Main |
IKE-TEST |
3DES |
SHA |
pre-shared key |
2 |
8 Hour |
HOST-2 addr |
PROTO_IPSEC_ESP |
ESP_3DES |
Transport |
HMAC-SHA |
8 Hour |
any |
*Ex Mode = Exchange mode
*IDx = identity payload(FQDN or user FQDN can also be chosen as IDx)
*Enc Alg = IKE Encryption Algorithm
*Hash Alg = IKE Authentication Algorithm
*Key Value = pre-shared key value
*PH1 Lt = Phase-1 Lifetime
*PH2 Lt = Phase-2 Lifetime
*Proto ID = Protocol Identifier
*Trans ID = Transform Identifier
*Mode = Encapsulation Mode
*Auth Alg = Authentication Algorithm
*Auth Method = Authentication Method
*DH Group = Diffie-Hellman Group
*Upper = Upper Layer Protocol
*NUT addr = NUT address
*HOST-2 addr = HOST-2 address
This test check is following.
IDENTITY PROTECTION EXCHANGE
# Initiator(TN) Direction Responder(NUT)
(1) HDR; SA ========>
(2) <======== HDR; SA
Judgement (Check *1)
1. Send the first message from TN
In the first message (1), the initiator generates a proposal it
considers adequate to protect traffic for the given situation. The
Security Association, Proposal, and Transform payloads are included
in the Security Association payload (for notation purposes).
2. Receive the second message from NUT
In the second message (2), the responder indicates the protection
suite it has accepted with the Security Association, Proposal, and
Transform payloads.
The first message must be accepted. And the second message's ISAKMP
Header Format must be base on description of RFC(see above Verification Points).
(cookie is set to Responder cookie filed, Major version=1 and Minor version=0 ,
Flags field is correct and Message ID=0).
Clean up SAD and SPD
RFC2408
3.1 ISAKMP Header Format
(omit)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Initiator !
! Cookie !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Responder !
! Cookie !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Message ID !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
(omit)
o Next Payload (1 octet) - Indicates the type of the first payload
in the message. The format for each payload is defined in
sections 3.4 through 3.16. The processing for the payloads is
defined in section 5.
Next Payload Type Value
NONE 0
Security Association (SA) 1
Proposal (P) 2
Transform (T) 3
Key Exchange (KE) 4
Identification (ID) 5
Certificate (CERT) 6
Certificate Request (CR) 7
Hash (HASH) 8
Signature (SIG) 9
Nonce (NONCE) 10
Notification (N) 11
Delete (D) 12
Vendor ID (VID) 13
RESERVED 14 - 127
Private USE 128 - 255
o Major Version (4 bits) - indicates the major version of the ISAKMP
protocol in use. Implementations based on this version of the
ISAKMP Internet-Draft MUST set the Major Version to 1.
Implementations based on previous versions of ISAKMP Internet-
Drafts MUST set the Major Version to 0. Implementations SHOULD
never accept packets with a major version number larger than its
own.
o Minor Version (4 bits) - indicates the minor version of the
ISAKMP protocol in use. Implementations based on this version of
the ISAKMP Internet-Draft MUST set the Minor Version to 0.
Implementations based on previous versions of ISAKMP Internet-
Drafts MUST set the Minor Version to 1. Implementations SHOULD
never accept packets with a minor version number larger than its
own, given the major version numbers are identical.
o Exchange Type (1 octet) - indicates the type of exchange being
used. This dictates the message and payload orderings in the
ISAKMP exchanges.
Exchange Type Value
NONE 0
Base 1
Identity Protection 2
Authentication Only 3
Aggressive 4
Informational 5
ISAKMP Future Use 6 - 31
DOI Specific Use 32 - 239
Private Use 240 - 255
o Flags (1 octet) - indicates specific options that are set for the
ISAKMP exchange. The flags listed below are specified in the
Flags field beginning with the least significant bit, i.e the
Encryption bit is bit 0 of the Flags field, the Commit bit is bit
1 of the Flags field, and the Authentication Only bit is bit 2 of
the Flags field. The remaining bits of the Flags field MUST be
set to 0 prior to transmission.
(omit)
o Message ID (4 octets) - Unique Message Identifier used to
identify protocol state during Phase 2 negotiations. This value
is randomly generated by the initiator of the Phase 2
negotiation. In the event of simultaneous SA establishments
(i.e. collisions), the value of this field will likely be
different because they are independently generated and, thus, two
security associations will progress toward establishment.
However, it is unlikely there will be absolute simultaneous
establishments. During Phase 1 negotiations, the value MUST be
set to 0.
o Length (4 octets) - Length of total message (header + payloads)
in octets. Encryption can expand the size of an ISAKMP message.
(omit)
5.2 ISAKMP Header Processing
When creating an ISAKMP message, the transmitting entity (initiator
or responder) MUST do the following:
1. Create the respective cookie. See section 2.5.3 for details.
2. Determine the relevant security characteristics of the session
(i.e. DOI and situation).
3. Construct an ISAKMP Header with fields as described in section
3.1.
4. Construct other ISAKMP payloads, depending on the exchange type.
5. Transmit the message to the destination host as described in
section5.1.
RFC2409
4. Introduction
(omit)
The ISAKMP SA is bi-directional. That is, once established, either
party may initiate Quick Mode, Informational, and New Group Mode
Exchanges. Per the base ISAKMP document, the ISAKMP SA is identified
by the Initiator's cookie followed by the Responder's cookie-- the
role of each party in the phase 1 exchange dictates which cookie is
the Initiator's. The cookie order established by the phase 1 exchange
continues to identify the ISAKMP SA regardless of the direction the
Quick Mode, Informational, or New Group exchange. In other words, the
cookies MUST NOT swap places when the direction of the ISAKMP SA
changes.
(omit)
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