I_RFC2408_5_10_2_1_CR - [Initiator Test] Invalid Certificate Request Payload Format( Certificate Encoding value is incorrect) check
End-Node
I_RFC2408_5_10_2_1_CR.seq [-tooloption ...] -pkt I_RFC2408_5_10_2_1_CR.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):responder
|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:initiator
XXXX: EUI64 address
Verification Points
Determine if the Certificate Encoding is supported. If the
Certificate Encoding is invalid, the payload is discarded and the
following actions are taken:
(a) The event, INVALID CERTIFICATE TYPE, MAY be logged in
the appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the INVALID-CERT-ENCODING message type MAY be
sent to the transmitting entity. This action is dictated by
a system security policy.
Configuration
Initiator and Responder generate the public key and the secret key
Certificate Request Payload Format(HOST-2:Responder)
Cert Encoding Type fild: 255 (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 |
Upper |
| NUT |
NUT addr |
HOST-2 addr |
Main |
|
3DES |
SHA |
RSA signatures |
2 |
8 Hour |
NUT addr |
PROTO_IPSEC_ESP |
ESP_3DES |
Transport |
HMAC-SHA |
8 Hour |
any |
| HOST-2 |
HOST-2 addr |
NUT addr |
Main |
|
3DES |
SHA |
RSA signatures |
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
Pre-Sequence
In order to start the negotiation of IKE,
NUT transmits Echo Request to TN(HOST-2).
This test check is following.
IDENTITY PROTECTION EXCHANGE
# Initiator(NUT) Direction Responder(TN)
(1) HDR; SA ========>
(2) <======== HDR; SA
(3) HDR; KE; NONCE ========>
(4) <======== HDR; KE; NONCE; CERT Req <---Cert Encoding Type fild: 255(invalid)
(5-A)HDR*; IDii; CERT;
CERT Req; SIG_I ========> X <---must not transmit
or
(5-B)HDR*; HASH(1); N/D ========>
(HDR; N/D)
Judgement (Check *1)
1. Receive the first message from NUT
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. Send the second message from TN
In the second message (2), the responder indicates the protection
suite it has accepted with the Security Association, Proposal, and
Transform payloads.
3. Receive the third message from NUT
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. Send the fourth message from TN
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.
Additionally the responder send Certificate Request Payload.
5. Receive the fifth message from NUT
In the fifth message (5-B), the initiator indicates either an ISAKMP
Notify Payload or an ISAKMP delete Payload.
The first and the third message must be exchanged correctly.
The fourth message must not be accepted. And the fifth message(5-A)
must not be returned (* or INVALID-CERT-ENCODING message(5-B) is returned).
*option : if you want to check the retruned Notify message.
Clean up SAD and SPD
RFC2408
5.10 Certificate Request Payload Processing
(omit)
When a Certificate Request payload is received, the receiving entity
(initiator or responder) MUST do the following:
1. Determine if the Certificate Encoding is supported. If the
Certificate Encoding is invalid, the payload is discarded and the
following actions are taken:
(a) The event, INVALID CERTIFICATE TYPE, MAY be logged in
the appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the INVALID-CERT-ENCODING message type MAY be
sent to the transmitting entity. This action is dictated by
a system security policy.
If the Certificate Encoding is not supported, the payload is
discarded and the following actions are taken:
(a) The event, CERTIFICATE TYPE UNSUPPORTED, MAY be logged in
the appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the CERT-TYPE-UNSUPPORTED message type MAY be
sent to the transmitting entity. This action is dictated by
a system security policy.
2. Determine if the Certificate Authority is supported for the
specified Certificate Encoding. If the Certificate Authority is
invalid or improperly formatted, the payload is discarded and the
following actions are taken:
(a) The event, INVALID CERTIFICATE AUTHORITY, MAY be logged in
the appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the INVALID-CERT-AUTHORITY message type MAY be
sent to the transmitting entity. This action is dictated by
a system security policy.
3. Process the Certificate Request. If a requested Certificate Type
with the specified Certificate Authority is not available, then
the payload is discarded and the following actions are taken:
(a) The event, CERTIFICATE-UNAVAILABLE, MAY be logged in the
appropriate system audit file.
(b) An Informational Exchange with a Notification payload
containing the CERTIFICATE-UNAVAILABLE message type MAY be
sent to the transmitting entity. This action is dictated by
a system security policy.
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