R_RFC2408_3_1_6_P_2 - [Responder Test] set Commit Bit(CONNECTED Notify Message)
End-Node
R_RFC2408_3_1_6_P_2.seq [-tooloption ...] -pkt R_RFC2408_3_1_6_P_2.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
If set(1), the entity which did not set the Commit Bit MUST wait
for an Informational Exchange containing a Notify payload (with the
CONNECTED Notify Message) from the entity which set the Commit Bit.
Configuration
Initiator(TN)'s Commit Bit of ISAKMP header is set to 1 in Phase II.
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(Aggresive mode can also be chosen as Ex 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.
* 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 ========>
(2) <======== HDR*, HASH(2), SA, Nr
(3) HDR*, HASH(3) ========> <--- Commit Bit = 1
(4) HDR*; HASH(1), N/D ========> <--- Commit Bit = 1
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.
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. And responder send HASH(2) and Nonce.
HASH(2) is identical to HASH(1) except the initiator's nonce-- Ni,
minus the payload header-- is added after M-ID but before the
complete message. Nonce is random
information which is used to guarantee liveness.
3. Send the third message from TN
In the third (3) message, the initiator send HASH(3).
HASH(3)-- for liveliness-- is the prf over the
value zero represented as a single octet, followed by a concatenation
of the message id and the two nonces-- the initiator's followed by
the responder's-- minus the payload header.
4. Send the fourth message from TN
In the fourth message (4), the initiator indicates either an ISAKMP
Notify Payload or an ISAKMP delete Payload.
In this case, the initiator send CONNECTED Notify Message.
* IPsec transmission
Send Echo Request from NUT(responder) to HOST-2(initiator) before the CONNECTED Notify Message(The forth messege in Phase II)
# Initiator(TN) Direction Responder(NUT)
(1) IP_HDR; ESP*;
<======== ICMP(Echo request) <--- Send before the CONNECTED Notify Message(The forth messege in Phase II)
Judgement (Check *1)
1. Send the first message from TN
In the first message (1), responder(NUT) send Echo request to initiator
(TN) with IPsec SA.
In Phase I , messages must be exchanged correctly.
In Phase II , the first to the third message must be exchanged correctly.
And NUT must wait for an Informational Exchange containing
a Notify payload(with the CONNECTED Notify Message).
Before NUT recive the CONNECTED Notify Message, NUT send Echo Request to HOST-2,
but this Echo Request must not be recived before HOST-2(responder) send the CONNECTED Notify Message.
After NUT revive the CONNECTED Notify Message, NUT must send Echo Request with IPsec SA.
And must conform to above Configuration.
Clean up SAD and SPD
RFC2408
3.1 ISAKMP Header Format
(omit)
-- C(ommit Bit) (1 bit) - This bit is used to signal key exchange
synchronization. It is used to ensure that encrypted material
is not received prior to completion of the SA establishment.
The Commit Bit can be set (at anytime) by either party
participating in the SA establishment, and can be used during
both phases of an ISAKMP SA establishment. However, the value
MUST be reset after the Phase 1 negotiation. If set(1), the
entity which did not set the Commit Bit MUST wait for an
Informational Exchange containing a Notify payload (with the
CONNECTED Notify Message) from the entity which set the Commit
Bit. In this instance, the Message ID field of the
Informational Exchange MUST contain the Message ID of the
original ISAKMP Phase 2 SA negotiation. This is done to
ensure that the Informational Exchange with the CONNECTED
Notify Message can be associated with the correct Phase 2 SA.
The receipt and processing of the Informational Exchange
indicates that the SA establishment was successful and either
entity can now proceed with encrypted traffic communication.
In addition to synchronizing key exchange, the Commit Bit can
be used to protect against loss of transmissions over
unreliable networks and guard against the need for multiple
re-transmissions.
(omit)
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