SG_I_RFC2407_4_4_4_11_3 - [Initiator Test] Transform payload SA Attributes check(ESP_NULL,AES-XCBC-MAC)
SGW
SG_I_RFC2407_4_4_4_11_3.seq [-tooloption ...] -pkt SG_I_RFC2407_4_4_4_11_3.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):responder
|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):initiator
|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
All implementations within the IPSEC DOI MUST support ESP_NULL.
When negotiating ESP without confidentiality, the Auth
Algorithm attribute MUST be included in the proposal and the
ESP transform ID must be ESP_NULL.
Attributes described as basic MUST NOT be encoded as variable.
An SA Life Duration attribute MUST always follow an SA Life
Type which describes the units of duration.
The SA Attributes SHOULD be represented using the Data
Attributes format described in section 3.3.(see reference)
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 |
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_NULL |
Tunnel |
AES-XCBC-MAC |
8 Hour |
Net-z addr |
Net-v 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 |
ESP_NULL |
Tunnel |
AES-XCBC-MAC |
8 Hour |
Net-z addr |
Net-v 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
Pre-Sequence
In order to start the negotiation of IKE,
TN(HOST-1) transmits Echo Request to TN(HOST-2).
This test check is following.
* PHASE I
Either IDENTITY PROTECTION EXCHANGE or AGGRESSIVE EXCHANGE is performed as a pre sequence.
IDENTITY PROTECTION EXCHANGE
# Initiator(NUT) Direction Responder(TN)
(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. 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.
5. Receive the fifth message from NUT
In the fifth (5) message, the initiator send identification
information and the results of the agreed upon authentication
function(hash function).
6. Send the sixth message from TN
In the sixth (6) message, the responder send identification
information and the results of the agreed upon authentication
function(hash function).
AGGRESSIVE EXCHANGE
# Initiator(NUT) Direction Responder(TN) 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. Recieve 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). 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. 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. 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. Recieve the third message from NUT
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(NUT) Direction Responder(TN)
(1) HDR*, HASH(1),
SA, Ni,IDci, IDcr; ========>
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).
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.
In Phase I , messages must be exchanged correctly.
In Phase II , the first message which has ESP_NULL and Auth(AES-XCBC-MAC)
attribute must be received and must be base on description of RFC
(see above Verification Points).
And must conform to above Configuration.
Clean up SAD and SPD
RFC2407
4.4.4.11 ESP_NULL
The ESP_NULL type specifies no confidentiality is to be provided by
ESP. ESP_NULL is used when ESP is being used to tunnel packets which
require only authentication, integrity protection, and replay
detection.
All implementations within the IPSEC DOI MUST support ESP_NULL. The
ESP NULL transform is defined in [ESPNULL]. See the Authentication
Algorithm attribute description in Section 4.5 for additional
requirements relating to the use of ESP_NULL.
(omit)
4.5 IPSEC Security Association Attributes
(omit)
Attributes described as basic MUST NOT be encoded as variable.
Variable length attributes MAY be encoded as basic attributes if
their value can fit into two octets. See [IKE] for further
information on attribute encoding in the IPSEC DOI. All restrictions
listed in [IKE] also apply to the IPSEC DOI.
(omit)
An SA Life Duration attribute MUST always follow an SA Life
Type which describes the units of duration.
(omit)
When negotiating ESP without confidentiality, the Auth
Algorithm attribute MUST be included in the proposal and the
ESP transform ID must be ESP_NULL.
(omit)
RFC2408
3.3 Data Attributes
There are several instances within ISAKMP where it is necessary to
represent Data Attributes. An example of this is the Security
Association (SA) Attributes contained in the Transform payload
(described in section 3.6). These Data Attributes are not an ISAKMP
payload, but are contained within ISAKMP payloads. The format of the
Data Attributes provides the flexibility for representation of many
different types of information. There can be multiple Data
Attributes within a payload. The length of the Data Attributes will
either be 4 octets or defined by the Attribute Length field. This is
done using the Attribute Format bit described below. Specific
information about the attributes for each domain will be described in
a DOI document, e.g. IPSEC DOI [IPDOI].
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
!A! Attribute Type ! AF=0 Attribute Length !
!F! ! AF=1 Attribute Value !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. AF=0 Attribute Value .
. AF=1 Not Transmitted .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 4: Data Attributes
The Data Attributes fields are defined as follows:
o Attribute Type (2 octets) - Unique identifier for each type of
attribute. These attributes are defined as part of the DOI-
specific information.
The most significant bit, or Attribute Format (AF), indicates
whether the data attributes follow the Type/Length/Value (TLV)
format or a shortened Type/Value (TV) format. If the AF bit is a
zero (0), then the Data Attributes are of the Type/Length/Value
(TLV) form. If the AF bit is a one (1), then the Data Attributes
are of the Type/Value form.
o Attribute Length (2 octets) - Length in octets of the Attribute
Value. When the AF bit is a one (1), the Attribute Value is only
2 octets and the Attribute Length field is not present.
o Attribute Value (variable length) - Value of the attribute
associated with the DOI-specific Attribute Type. If the AF bit
is a zero (0), this field has a variable length defined by the
Attribute Length field. If the AF bit is a one (1), the
Attribute Value has a length of 2 octets.
perldoc V6evalTool
IKE.html IKE Test Common Utility