SG_R_RFC3602_5_2 - [Responder Test] Transform payload SA Attributes check(ESP_AES(128bit),HMAC-SHA)
SGW
SG_R_RFC3602_5_2.seq [-tooloption ...] -pkt SG_R_RFC3602_5_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)
|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
AES-128 in CBC mode [RFC3602] SHOULD be supported
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_AES |
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 |
ESP_AES |
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; ========>
(2) <======== HDR*, HASH(2), SA, Nr, IDci, IDcr;
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), 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. IDci and IDcr is
identification information.
In Phase I , messages must be exchanged correctly.
In Phase II , the first message must be accepted. And the second message which has
ESP_AES and Auth(HMAC-SHA) 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
RFC3602
5. IKE Interactions
5.2. Phase 2 Identifier
For Phase 2 negotiations, IANA has assigned an ESP Transform
Identifier of 12 for ESP_AES.
Algorithms for Internet Key Exchange version 1 (IKEv1)
draft-hoffman-ikev1-algorithms-02.txt
3. New algorithm requirements
The new requirements for IKEv1 are:
o TripleDES for encryption MUST be supported
o AES-128 in CBC mode [RFC3602] SHOULD be supported
o SHA-1 for hashing and HMAC functions MUST be supported
o Pre-shared secrets for authentication MUST be supported
o AES-128 in CBC mode for HMAC functions ([RFC3566] and [RFC3664])
SHOULD be supported
o Diffie-Hellman MODP group 2 (discrete log 1024 bits) MUST be
supported
o Diffie-Hellman MODP group 14 (discrete log 2048 bits) [RFC3526]
SHOULD be supported
o RSA for authentication with signatures SHOULD be supported
The other algorithms that were listed at MUST-level and SHOULD-level
in RFC 2409 are now MAY-level. This includes DES for encryption, MD5
and Tiger for hashing, Diffie-Hellman MODP group 1, Diffie-Hellman
MODP groups with elliptic curves, DSA for authentication with
signatures, and RSA for authentication with encryption. DES for
encryption, MD5 for hashing, Diffie-Hellman MODP group 1 are dropped
to MAY due to cryptographic weakness. Tiger for hashing,
Diffie-Hellman MODP groups with elliptic curves, DSA for
authentication with signatures, and RSA for authentication with
encryption are dropped due to lack of any significant deployment and
interoperability.
RFC2407
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)
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.
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