SG_R_RFC2408_5_6_2_1_P2_T - [Responder Test] Check the Transform-ID field to confirm it is valid
SGW
SG_R_RFC2408_5_6_2_1_P2_T.seq [-tooloption ...] -pkt SG_R_RFC2408_5_6_2_1_P2_T.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)
|3ffe:501:ffff:104::11
|
Net-v --+------------------------+-------- 3ffe:501:ffff:104::/64
|
|
SGW-2(TN):initiator
|3ffe:501:ffff:103::11
|
Net-w --+--------+------------------------ 3ffe:501:ffff:103::/64
|
|
ROUTER-2(TN)
| 3ffe:501:ffff:102::11
|
Net-x --+--------+------------------------ 3ffe:501:ffff:102::/64
|
|3ffe:501:ffff:102::1
SGW-1(NUT):responder
|3ffe:501:ffff:101::1
|
Net-y --+--------+------------------------ 3ffe:501:ffff:101::/64
|
| 3ffe:501:ffff:101::11
ROUTER-1(TN)
|
|
Net-z -----------+---------------+-------- 3ffe:501:ffff:100::/64
|
|3ffe:501:ffff:100::13
HOST-1(TN)
Verification Points
Determine if the Transform is supported. If the Transform-ID
field contains an unknown or unsupported value, then that
Transform payload MUST be ignored and MUST NOT cause the
generation of an INVALID TRANSFORM event. If the Transform-ID
field is invalid, the payload is discarded and the following
actions are taken:
(a) The event, INVALID TRANSFORM, MAY be logged in the
appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the INVALID-TRANSFORM-ID message type MAY be sent
to the transmitting entity. This action is dictated by a
system security policy.
Configuration
Transform Payload Format(HOST-2:Initiator,In Phase II)
Transform-ID field : 248(invalid value)
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 |
IDci |
IDcr |
Upper |
| SGW-1 |
SGW-1 addr |
SGW-2 addr |
Main |
IKE-TEST |
3DES |
SHA |
pre-shared key |
2 |
8 Hour |
SGW-1 addr |
PROTO_IPSEC_ESP |
ESP_3DES |
Tunnel |
HMAC-SHA |
8 Hour |
Net-v addr |
Net-z addr |
any |
| SGW-2 |
SGW-2 addr |
SGW-1 addr |
Main |
IKE-TEST |
3DES |
SHA |
pre-shared key |
2 |
8 Hour |
SGW-2 addr |
PROTO_IPSEC_ESP |
248 |
Tunnel |
HMAC-SHA |
8 Hour |
Net-v addr |
Net-z addr |
any |
*Ex Mode = Exchange mode(Aggresive mode can also be chosen as Ex Mode)
*IDx = identity payload(FQDN or user FQDN can also be chosen as IDx)
*IDci = identity payload
*IDcr = identity payload
*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
*SGW-1 addr = SGW-1 address
*SGW-2 addr = SGW-2 address
*Net-z = Net-z network address
*Net-v = Net-v network address
This test check is following.
* PHASE I
Either IDENTITY PROTECTION EXCHANGE or AGGRESSIVE EXCHANGE is performed as a pre sequence.
IDENTITY PROTECTION EXCHANGE
# Initiator(TN) Direction Responder(NUT)
(1) HDR; SA ========>
(2) <======== HDR; SA
(3) HDR; KE; NONCE ========>
(4) <======== HDR; KE; NONCE
(5) HDR*; IDii; HASH_I ========>
(6) <======== HDR*; IDir; HASH_R
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.
3. Send the third message from TN
In the third (3) message, the initiator send keying material
used to arrive at a common shared secret and random information
which is used to guarantee liveness and protect against replay attacks.
4. Receive the fourth message from NUT
In the fourth (4) message, the responder send keying material
used to arrive at a common shared secret and random information
which is used to guarantee liveness and protect against replay attacks.
5. Send the fifth message from TN
In the fifth (5) message, the initiator send identification
information and the results of the agreed upon authentication
function(hash function).
6. Receive the sixth message from NUT
In the sixth (6) message, the responder send identification
information and the results of the agreed upon authentication
function(hash function).
AGGRESSIVE EXCHANGE
# Initiator(TN) Direction Responder(NUT) NOTE
(1) HDR; SA; KE; => Begin ISAKMP-SA or
Proxy negotiation
NONCE; IDii and Key Exchange
(2) <= HDR; SA; KE;
NONCE; IDir; AUTH
Initiator Identity
Verified by Responder
Key Generated
Basic SA agreed upon
(3) HDR*; AUTH =>
Responder Identity
Verified by Initiator
SA established
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). There
can be only one Proposal and one Transform offered (i.e. no choices)
in order for the aggressive exchange to work. Keying material used
to arrive at a common shared secret and random information which is
used to guarantee liveness and protect against replay attacks are
also transmitted. Random information provided by both parties SHOULD
be used by the authentication mechanism to provide shared proof of
participation in the exchange. Additionally, the initiator transmits
identification information.
2. Recieve 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. Keying material used to arrive at a common
shared secret and random information which is used to guarantee
liveness and protect against replay attacks is also transmitted.
Random information provided by both parties SHOULD be used by the
authentication mechanism to provide shared proof of participation in
the exchange. Additionally, the responder transmits identification
information. All of this information is transmitted under the
protection of the agreed upon authentication function. Local
security policy dictates the action of the responder if no proposed
protection suite is accepted. One possible action is the
transmission of a Notify payload as part of an Informational
Exchange.
3. Send the third message from TN
In the third (3) message, the initiator transmits the results of the
agreed upon authentication function. This information is transmitted
under the protection of the common shared secret. Local security
policy dictates the action if an error occurs during these messages.
One possible action is the transmission of a Notify payload as part
of an Informational Exchange.
The test sequence is following.
* PHASE II
QUICK MODE
# Initiator(TN) Direction Responder(NUT)
(1) HDR*, HASH(1),
SA, Ni,IDci, IDcr; ========> <-----Transform-ID field : 248(invalid)
(2-A) X <======== HDR*, HASH(2), SA, Nr <-----Must not transmit
IDci, IDcr;
or
(2-B) <======== HDR*, HASH(1), N/D;
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).
And initiator send HASH(1) and Nonce. HASH(1) is the prf over the
message id (M-ID) from the ISAKMP header concatenated with the entire
message that follows the hash including all payload headers,
but excluding any padding added for encryption. Nonce is random
information which is used to guarantee liveness. IDci and IDcr is
identification information.
2. Receive the second message from NUT
In the second message (2-B), the responder indicates either an ISAKMP
Notify Payload or an ISAKMP delete Payload. IDci and IDcr is
identification information.
In Phase I , messages must be exchanged correctly.
In Phase II , the first message must not accepted.
And the second message(2-A) must not returned
(*or INVALID-TRANSFORM-ID message(2-B) is returned).
*option : if you want to check the retruned Notify message.
Clean up SAD and SPD
RFC2408
5.6 Transform Payload Processing
(omit)
When a Transform payload is received, the receiving entity (initiator
or responder) MUST do the following:
1. Determine if the Transform is supported. If the Transform-ID
field contains an unknown or unsupported value, then that
Transform payload MUST be ignored and MUST NOT cause the
generation of an INVALID TRANSFORM event. If the Transform-ID
field is invalid, the payload is discarded and the following
actions are taken:
(a) The event, INVALID TRANSFORM, MAY be logged in the
appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the INVALID-TRANSFORM-ID message type MAY be sent
to the transmitting entity. This action is dictated by a
system security policy.
2. Ensure the Transforms are presented according to the details
given in section 3.6 and 4.2. If the transforms are not formed
correctly, the following actions are taken:
(a) Possible events, BAD PROPOSAL SYNTAX, INVALID TRANSFORM,
INVALID ATTRIBUTES, are logged in the appropriate system
audit file.
(b) An Informational Exchange with a Notification payload
containing the BAD-PROPOSAL-SYNTAX, PAYLOAD-MALFORMED or
ATTRIBUTES-NOT-SUPPORTED message type MAY be sent to the
transmitting entity. This action is dictated by a system
security policy.
3. Process the subsequent Transform and Proposal payloads as defined
by the Next Payload field. Examples of processing these payloads
are given in section 4.2.1.
(omit)
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