#!/usr/bin/perl
#
# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
# Yokogawa Electric Corporation.
# All rights reserved.
# 
# Redistribution and use of this software in source and binary
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# the following conditions and disclaimer are agreed and accepted
# by the user:
# 
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with
#    the distribution.
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# 3. Neither the names of the copyrighters, the name of the project
#    which is related to this software (hereinafter referred to as
#    "project") nor the names of the contributors may be used to
#    endorse or promote products derived from this software without
#    specific prior written permission.
# 
# 4. No merchantable use may be permitted without prior written
#    notification to the copyrighters.
# 
# 5. The copyrighters, the project and the contributors may prohibit
#    the use of this software at any time.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHTERS, THE PROJECT AND
# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING
# BUT NOT LIMITED THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.  IN NO EVENT SHALL THE
# COPYRIGHTERS, THE PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
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# $Id: IKEv2-SGW-R-1-2-4-1-A.seq,v 1.4 2009/04/28 06:40:11 doo Exp $
#
################################################################



BEGIN
{
	push(@INC, '..');
}

END { }



use IKEv2;
use strict;



my $remote	= 'common_remote_index';
my $ike_sa_init_req_param	= undef;
my $ike_sa_init_resp_param	= undef;
my $ike_auth_req_param	= undef;
my $ike_auth_resp_param	= undef;
my $create_child_sa_req_param = undef;
my $create_child_sa_resp_param = undef;

my $session	= undef;
my $material	= undef;
my $child_sa_material	= undef;
my $str	= undef;
my $ret	= undef;

my @local_create_child_sa_req = undef;
my @local_create_child_sa_resp = undef;


#--------------------------------------#
# prepare IKE_AUTH request             #
#--------------------------------------#
my $common_gen_ike_auth_req = $gen_ike_auth_req->{'common_remote_index'};
my @local_ike_auth_req = @{$common_gen_ike_auth_req};
# remove N(USE_TRANSPORT_MODE)
@local_ike_auth_req = grep {
                my $ret = 0;
                if ($_->{'self'} ne 'N') { $ret = 1; }
                if ($_->{'type'} ne 'USE_TRANSPORT_MODE') { $ret = 1; }
                $ret;
        } @local_ike_auth_req;
                                
$gen_ike_auth_req->{'SGW_R_IKE_AUTH_REQ'} = \@local_ike_auth_req;



#--------------------------------------#
# prepare IKE_AUTH response            #
#--------------------------------------#
my $common_exp_ike_auth_resp = $exp_ike_auth_resp->{'common_remote_index'};
my @local_ike_auth_resp = @{$common_exp_ike_auth_resp};
# remove N(USE_TRANSPORT_MODE)
foreach my $payload (@local_ike_auth_resp) {
        if ($payload->{'self'} eq 'E') {
                my @payloads = grep {
                                my $ret = 0;
                                if ($_->{'self'} ne 'N') { $ret = 1; }
                                if ($_->{'type'} ne 'USE_TRANSPORT_MODE') { $ret = 1; }
                                $ret;
                        } @{$payload->{'innerPayloads'}};

                $payload->{'innerPayloads'} = \@payloads;
        }
}
# set correct nexttype
for (my $i = 0; $i < scalar(@local_ike_auth_resp); $i++) {
        my $payload = $local_ike_auth_resp[$i];

        if ($payload->{'self'} eq 'E') {
                for (my $j = 0; $j < scalar(@{$payload->{'innerPayloads'}}); $j++) {
                        my $cur = $payload->{'innerPayloads'}->[$j];
                        my $next = $payload->{'innerPayloads'}->[$j+1];
                        unless (defined($next)) {
                                $cur->{'nexttype'} = '0';
                                next;
                        }
                        if ($cur->{'nexttype'} eq $next->{'self'}) {
                                next;
                        }
                        $cur->{'nexttype'} = $next->{'self'};
                }

                next;
        }

}
$exp_ike_auth_resp->{'SGW_R_IKE_AUTH_RESP'} = \@local_ike_auth_resp;



#--------------------------------------#
# prepare CREATE_CHILD_SA request      #
#--------------------------------------#
my $common_gen_create_child_sa_req = $gen_create_child_sa_req->{'common_remote_index'};
my @local_create_child_sa_req = @{$common_gen_create_child_sa_req};
# remove N(USE_TRANSPORT_MODE)
@local_create_child_sa_req = grep {
                my $ret = 0;
                if ($_->{'self'} ne 'N') { $ret = 1; }
                if ($_->{'type'} ne 'USE_TRANSPORT_MODE') { $ret = 1; }
                $ret;
        } @local_create_child_sa_req;
                                
$gen_create_child_sa_req->{'SGW_R_CREATE_CHILD_SA_REQ'} = \@local_create_child_sa_req;



#--------------------------------------#
# prepare CREATE_CHILD_SA response     #
#--------------------------------------#
my $common_exp_create_child_sa_resp = $exp_create_child_sa_resp->{'common_remote_index'};
my @local_create_child_sa_resp = @{$common_exp_create_child_sa_resp};
# remove N(USE_TRANSPORT_MODE)
foreach my $payload (@local_create_child_sa_resp) {
        if ($payload->{'self'} eq 'E') {
                my @payloads = grep {
                                my $ret = 0;
                                if ($_->{'self'} ne 'N') { $ret = 1; }
                                if ($_->{'type'} ne 'USE_TRANSPORT_MODE') { $ret = 1; }
                                $ret;
                        } @{$payload->{'innerPayloads'}};

                $payload->{'innerPayloads'} = \@payloads;
        }
}
# set correct nexttype
for (my $i = 0; $i < scalar(@local_create_child_sa_resp); $i++) {
        my $payload = $local_create_child_sa_resp[$i];

        if ($payload->{'self'} eq 'E') {
                $payload->{'innerType'} = @{$payload->{'innerPayloads'}}[0]->{'self'};

                for (my $j = 0; $j < scalar(@{$payload->{'innerPayloads'}}); $j++) {
                        my $cur = $payload->{'innerPayloads'}->[$j];
                        my $next = $payload->{'innerPayloads'}->[$j+1];
                        unless (defined($next)) {
                                $cur->{'nexttype'} = '0';
                                next;
                        }
                        if ($cur->{'nexttype'} eq $next->{'self'}) {
                                next;
                        }
                        $cur->{'nexttype'} = $next->{'self'};
                }

                next;
        }

}
$exp_create_child_sa_resp->{'SGW_R_CREATE_CHILD_SA_RESP'} = \@local_create_child_sa_resp;



#------------------------------#
# register IKEv2.pm            #
#------------------------------#
kLogHTML('<FONT COLOR="#FF0000" SIZE="+1"><U><B>TEST SETUP</B></U></FONT>');



unless(IKEv2initialize('SGW', 'SGW')) {
	IKEv2exitFatal('<FONT COLOR="#ff0000">IKEv2 module initializing failure</FONT>');
}



#------------------------------#
# configure TN                 #
#------------------------------#
unless(IKEv2setupTN()) {
	IKEv2exitFatal('<FONT COLOR="#ff0000">TN setup failure</FONT>');
}



#------------------------------#
# configure NUT                #
#------------------------------#
unless(IKEv2setupNUT()) {
	IKEv2exitFatal('<FONT COLOR="#ff0000">NUT setup failure</FONT>');
}



#------------------------------#
# prepare session handler      #
#------------------------------#
kLogHTML('<FONT COLOR="#FF0000" SIZE="+1"><U><B>TEST PROCEDURE</B></U></FONT>');



$session = IKEv2create_session($remote);
unless(defined($session)) {
	IKEv2exitFatal('<FONT COLOR="#ff0000">IKEv2 session creation failure</FONT>');
}



#--------------------------------------#
# send IKE_SA_INIT request to NUT      #
#--------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |<--------------| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$ike_sa_init_req_param = devel_IKEv2send_IKE_SA_INIT_request($session, $remote);
unless(defined($ike_sa_init_req_param)) {
	kLogHTML(kDump_Common_Error());
	IKEv2exitFatal('<FONT COLOR="#ff0000">Can\'t send IKE_SA_INIT request.</FONT>');
}



#--------------------------------------#
# receive IKE_SA_INIT response by NUT  #
#--------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |-------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$ike_sa_init_resp_param = devel_IKEv2receive_IKE_SA_INIT_response($session,
							$remote,
							$ike_sa_init_req_param);
unless(defined($ike_sa_init_resp_param)) {
	kLogHTML(kDump_Common_Error());
	kLogHTML('<FONT COLOR="#ff0000">Can\'t observe IKE_SA_INIT response.</FONT>');
	IKEv2exitFail();
}



#--------------------------------------#
# generate keying material             #
#--------------------------------------#
$material = devel_IKEv2gen_keymat(1, $ike_sa_init_req_param, $ike_sa_init_resp_param);
unless(defined($material)) {
	kLogHTML(kDump_Common_Error());
	IKEv2exitFatal('<FONT COLOR="#ff0000">Can\'t generate keying material.</FONT>');
}



#--------------------------------------#
# send IKE_AUTH request to NUT         #
#--------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |<--------------| IKE_AUTH request (HDR, SK {IDi, AUTH, SAi2, TSi, TSr})\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$ike_auth_req_param = devel_IKEv2send_IKE_AUTH_request($session,
							'SGW_R_IKE_AUTH_REQ',
							$ike_sa_init_req_param,
							$ike_sa_init_resp_param,
							$material);
unless(defined($ike_auth_req_param)) {
	kLogHTML(kDump_Common_Error());
	IKEv2exitFatal('<FONT COLOR="#ff0000">Can\'t send IKE_AUTH request.</FONT>');
}



#--------------------------------------#
# receive IKE_AUTH response by NUT     #
#--------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |-------------->| IKE_AUTH response (HDR, SK {IDr, AUTH,  SAr2, TSi, TSr)\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$ike_auth_resp_param = devel_IKEv2receive_IKE_AUTH_response($session,
							'SGW_R_IKE_AUTH_RESP',
							$ike_sa_init_req_param,
							$ike_sa_init_resp_param,
							$ike_auth_req_param,
							$material);
unless(defined($ike_auth_resp_param)) {
	kLogHTML(kDump_Common_Error());
	kLogHTML('<FONT COLOR="#ff0000">Can\'t observe IKE_AUTH response.</FONT>');
	IKEv2exitFail();
}



#--------------------------------------#
# prepare CREATE_CHILD_SA request      #
#--------------------------------------#
my $req_notify_for_rekey =
{	# Notify Payload
	'self'		=> 'N',		# *** MUST BE HERE ***
	'nexttype'	=> undef,	# Next Payload
	'critical'	=> undef,	# Critical
	'reserved'	=> undef,	# RESERVED
	'length'	=> undef,	# Payload Length
	'id'		=> '3',		# Protocol ID
	'spiSize'	=> '4',		# SPI Size
	'type'		=> 'REKEY_SA',	# Notify Message Type
	'spi'		=> $ike_auth_req_param->{'spi'}[0],	  # SPI
	'data'		=> undef	# Notification Data
};
my $common_create_child_sa_req = IKEv2load_packet($gen_create_child_sa_req, 'SGW_R_CREATE_CHILD_SA_REQ');
@local_create_child_sa_req = @{$common_create_child_sa_req};
# change N(USE_TRANSPORT_MODE) & add N(REKEY_SA)
for (my $i = 0; $i < scalar(@local_create_child_sa_req); $i++) {
	my $payload = $local_create_child_sa_req[$i];

	if ($payload->{'self'} eq 'E') {
		splice(@local_create_child_sa_req, $i+1, 0, $req_notify_for_rekey);
		next;
	}
	if ($payload->{'self'} eq 'SA') {
		for (my $j = 0; $j < scalar(@{$payload->{'proposals'}}); $j++) {
			my $proposal = @{$payload->{'proposals'}}[$j];

			if (defined($proposal->{'transforms'})) {
				for (my $k = 0; $k < scalar(@{$proposal->{'transforms'}}); $k++) {
					my $transform = @{$proposal->{'transforms'}}[$k];

					if ($transform->{'type'} eq 'ENCR') {
						$transform->{'id'} = 'AES_CBC';
					}
					if ($transform->{'type'} eq 'INTEG') {
						$transform->{'id'} = 'AES_XCBC_96';
					}
					if ($transform->{'type'} eq 'ESN') {
						$transform->{'id'} = 'ESN';
					}
				}
			}
		}
	}
}
$gen_create_child_sa_req->{'SGW-R-1-2-4-100.1'} = \@local_create_child_sa_req;



#--------------------------------------#
# send CREATE_CHILD_SA request to NUT  #
#--------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |<--------------| CREATE_CHILD_SA request (HDR, SK {N(REKEY_SA), SA, Ni, TSi, TSr})\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$create_child_sa_req_param = devel_IKEv2send_CREATE_CHILD_SA_request($session,
                                                                     'SGW-R-1-2-4-100.1',
                                                                     $ike_sa_init_req_param,
                                                                     $ike_sa_init_resp_param,
                                                                     $ike_auth_req_param,
                                                                     $material);
unless(defined($create_child_sa_req_param)) {
        kLogHTML(kDump_Common_Error());
        IKEv2exitFatal('<FONT COLOR="#ff0000">Can\'t send CREATE_CHILD_SA request.</FONT>');
}



#--------------------------------------#
# prepare CREATE_CHILD_SA response     #
#--------------------------------------#
my $resp_notify_for_noprop =
{       # Notify Payload
        'self'          => 'N',        # *** MUST BE HERE ***
        'nexttype'      => '0',        # Next Payload
        'critical'      => '0',        # Critical
        'reserved'      => '0',        # RESERVED
        'length'        => '8',        # Payload Length
        'id'            => '0',        # Protocol ID
        'spiSize'       => '0',        # SPI Size
        'type'          => 'NO_PROPOSAL_CHOSEN',  # Notify Message Type
};
my $common_create_child_sa_resp = $exp_create_child_sa_resp->{'SGW_R_CREATE_CHILD_SA_RESP'};
@local_create_child_sa_resp = @{$common_create_child_sa_resp};
foreach my $payload (@local_create_child_sa_resp) {
        if ($payload->{'self'} eq 'E') {
                splice(@{$payload->{'innerPayloads'}}, 0);
                push(@{$payload->{'innerPayloads'}}, $resp_notify_for_noprop);
                $payload->{'innerType'} = 'N';
        }
}
$exp_create_child_sa_resp->{'SGW-R-1-2-4-100.2'} = \@local_create_child_sa_resp;




#------------------------------------------#
# receive CREATE_CHILD_SA response by NUT  #
#------------------------------------------#
$str  = '<PRE>';
$str .= "    (R)             (I)\n";
$str .= "    NUT             TN1\n";
$str .= "     |               |\n";
$str .= "     |-------------->| CREATE_CHILD_SA response (HDR, SK {N(NO_PROPOSAL_CHOSEN)})\n";
$str .= "     |               |\n";
$str .= "     V               V";
$str .= '</PRE>';

kLogHTML($str);



$create_child_sa_resp_param = devel_IKEv2receive_CREATE_CHILD_SA_response($session,
                                                                          'SGW-R-1-2-4-100.2',
                                                                          $ike_sa_init_req_param,
                                                                          $ike_sa_init_resp_param,
                                                                          $create_child_sa_resp_param,
                                                                          $material);
unless(defined($create_child_sa_resp_param)) {
        kLogHTML(kDump_Common_Error());
        kLogHTML('<FONT COLOR="#ff0000">Can\'t observe CREATE_CHILD_SA response.</FONT>');
        IKEv2exitFail();
}



#--------------------------------------#
# exit with cleanup                    #
#--------------------------------------#
IKEv2exitPass();
# NOTREACHED



#
# perldoc
#
########################################################################
__END__

=head1 Title

  Test IKEv2.SGW.R.1.2.4.1: Sending NO_PROPOSAL_CHOSEN
  Part A: (BASIC)

=head1 Purpose

  To verify an IKEv2 device properly handles an IKE_AUTH request with an unacceptable SA
  payload.

=head1 References

  * [RFC 4306] - Sections 2.7 and 3.10.1
  * [RFC 4718] - Sections 2.1 and 2.2

=head1 Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      In each part, configure the devices according to the Common Configuration.
  * Pre-Sequence and Cleanup Sequence
      IKEv2 on the NUT is disabled after each part.

=head1 Procedure

=begin html

<BLOCKQUOTE>
<PRE>

   NUT                  TN1
  (SGW)                (SGW)
    |                    |
    |<-------------------| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Packet #1)
    |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr)
    |                    | (Judgement #1)
    |                    |
    |<-------------------| IKE_AUTH request (HDR, SK {IDi, AUTH, SAi2, TSi, TSr})
    |                    | (Packet #2)
    |------------------->| IKE_AUTH response (HDR, SK {IDr, AUTH, SAr2, TSi, TSr})
    |                    | (Judgement #2)
    |                    |
    |<-------------------| CREATE_CHILD_SA request (HDR, SK {N, SA, Ni, TSi, TSr})
    |                    | (Packet #3)
    |---------X          | CREATE_CHILD_SA response (HDR, SK {SA, Nr, TSi, TSr})
    |                    |   or 
    |------------------->| CREATE_CHILD_SA response (HDR, SK {N(NO_PROPOSAL_CHOSEN)})
    |                    | (Judgement #3)
    |                    |
    V                    V
 N: REKEY_SA
</PRE>
</BLOCKQUOTE>

<BLOCKQUOTE>
<TABLE BORDER>
<TR>
<TD><TT>Packet #1</TT></TD>
<TD><TT>See Common Packet #1</TT></TD>
</TR>
<TR>
<TD><TT>Packet #2</TT></TD>
<TD><TT>See Common Packet #5</TT></TD>
</TR>
<TR>
<TD><TT>Packet #3</TT></TD>
<TD><TT>See below</TT></TD>
</TR>
</TABLE>
</BLOCKQUOTE>
<br>

<BLOCKQUOTE>
Packet #3: CREATE_CHILD_SA request 
<TABLE BORDER>
<TR>
<TD>IPv6 Header</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>UDP Header</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>IKEv2 Header</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>E Payload</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>N Payload</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>N Payload</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD rowspan="2">SA Payload</TD>
<TD colspan="2">Other fields are same as the common packet #15</TD>
</TR>
<TR>
<TD>SA Proposals</TD>
<TD>See below</TD>
</TR>
<TR>
<TD>Ni, Nr Payload</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>TSi Payload</TD>
<TD colspan="2">Same as the Common Packet #15</TD>
</TR>
<TR>
<TD>TSr Payload</TD>
<TD colspan="2">Same as the common packet #15</TD>
</TR>
</TABLE>
</BLOCKQUOTE>

<BLOCKQUOTE>
<TABLE BORDER>
<TR>
<TD rowspan="26">Proposal #1</TD>
<TD rowspan="26">SA Proposal</TD>
<TD colspan="2">Next Payload</TD>
<TD>0 (last)</TD>
</TR>
<TR>
<TD colspan="2">Reserved</TD>  
<TD>0</TD>
</TR>
<TR>
<TD colspan="2">Proposal Length</TD>
<TD>36</TD>
</TR>
<TR>
<TD colspan="2">Proposal #</TD>
<TD>1</TD>
</TR>
<TR>
<TD colspan="2">Proposal ID</TD>
<TD>3 (ESP)</TD>
</TR>
<TR>
<TD colspan="2">SPI Size</TD>
<TD>4</TD>
</TR>
<TR>
<TD colspan="2"># of Transforms</TD>
<TD>3</TD>
</TR>
<TR>
<TD colspan="2">SPI</TD>
<TD>any</TD>
</TR>

<TD rowspan="6">SA Transform</TD>
<TD>Next Payload</TD>
<TD>3 (more)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform Length</TD>
<TD>8</TD>
</TR>
<TR>
<TD>Transform Type</TD>
<TD>1 (ENCR)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform ID</TD>
<TD>12 (AES_CBC)</TD>
</TR>
<TR>

<TD rowspan="6">SA Transform</TD>
<TD>Next Payload</TD>
<TD>3 (more)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform Length</TD>
<TD>8</TD>
</TR>
<TR>
<TD>Transform Type</TD>
<TD>3 (INTEG)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform ID</TD>
<TD>5 (AES_XCBC_96)</TD>
</TR>

<TR>
<TD rowspan="6">SA Transform</TD>
<TD>Next Payload</TD>
<TD>0 (last)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform Length</TD>
<TD>8</TD>
</TR>
<TR>
<TD>Transform Type</TD>
<TD>5 (ESN)</TD>
</TR>
<TR>
<TD>Reserved</TD>
<TD>0</TD>
</TR>
<TR>
<TD>Transform ID</TD>
<TD>1 (ESN)</TD>
</TR>

</TABLE>
</BLOCKQUOTE>

=end html

  Part A: (BASIC)
     1. TN1 starts to negotiate with NUT by sending IKE_SA_INIT request.
     2. Observe the messages transmitted on Link A..
     3. After reception of IKE_SA_INIT response from the NUT, TN1 trasmits an IKE_AUTH
        request to the NUT.
     4. Observe the messages transmitted on Link A..
     5. TN1 transmits a CREATE_CHILD_SA request to rekey the established CHILD_SAs to the
        NUT. The CREATE_CHILD_SA request includes a SA payload with a proposal unaccepted
        by the NUT.
     6. Observe the messages transmitted on Link A..

=head1 Observable Result

  Part A
       Step 2: Judgment #1
       The NUT transmits an IKE_SA_INIT response including "ENCR_3DES",
       "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as accepted
       algorithms.

       Step 4: Judgment #2
       The NUT transmits an IKE_AUTH response including "ENCR_3DES",
       "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as accepted algorithms.

       Step 6: Judgment #3
       The NUT does not transmit a CREATE_CHILD_SA response or transmits a
       CREATE_CHILD_SA response including a Notify payload of type
       NO_PROPOSAL_CHOSEN.

=head1 Possible Problems

  * None.

=cut


