(RADIATOR) MSCHAPv2-over-PEAP with Radiator to RSA SECURID
Hugh Irvine
hugh at open.com.au
Fri Nov 3 15:52:13 CST 2006
Hello Andreas -
Thanks for your mail.
As far as I can see, Radiator is correctly authenticating with the
RSA server, but when Radiator sends the final Challenge to the client
nothing comes back. There should be a final exchange with the client
to complete the authentication.
The answers to your other questions have to do with the above -
Radiator only adds the reply attributes to the final access accept
which is why you are not seeing any reply attributes. And because
Radiator has a great number of vendor specific attributes in the
dictionary, we have adopted the practice of prefixing all vendor
specifics with the a tag indicating the vendor concerned.
I suggest you start with a simple AuthBy FILE in your outer Handler
to verify that a simple client authentication works correctly, then
move on to more complicated scenarios.
hope that helps
regards
Hugh
On 3 Nov 2006, at 21:40, Andreas Dietrich wrote:
> Hi everybody,
>
> at first some information about which kind of configuration I speak:
>
> 1st as supplicant: 802.1x standard xp sp2 client,
> 2nd as authenticator: trapeze mx200 wireless switch,
> 3rd as eap proxy: radiator,
> 4th as radius autenticaition server: RSA authentication manager 6.1
> with steelbelted radius
>
> Authenticate the win xp client on the RSA with mschapv2 over peap.
> Because of the hash problem of RSA (it cannot deal with a hashed
> password) I try the following:
>
> 802.1x credentials are Username: "user:PinTokencode" with empty
> password.
> Radiator splits the username into two different credentials, which
> are proxied to the RSA.
> After Accept from the RSA Radiator should inform Trapeze as the
> Authenticator, that auth process was a success
>
>
> ################### radius.cfg
> #########################################
> Foreground
> LogStdout
> LogDir c:/Program Files/Radiator
> DbDir c:/Program Files/Radiator
> BindAddress 10.0.0.20
> Trace 4
> <Client DEFAULT>
> Secret mysecretwithtrapeze
> DupInterval 0
> </Client>
> <Handler ConvertedFromEAPMSCHAPV2=1>
> PreAuthHook file:"c:/Program Files/Radiator/userauth.pl"
> <AuthBy RADIUS>
> Retries 0
> LocalAddress 10.0.0.20
> Host 10.0.0.21
> Secret sharedsecretwithmyrsa
> AuthPort 1645
> AcctPort 1646
> StripFromRequest ConvertedFromEAPMSCHAPV2, MS-CHAP2-Response, MS-
> CHAP-Challenge
> ReplyHook sub { my $p = ${$_[0]};\
> my $rp = ${$_[1]};\
> my $op = ${$_[2]};\
> my $sp = ${$_[3]};\
> my $attrib = $p->get_attr('TRPZ-VLAN-Name');\
> $attrib="$attrib";\
> $rp->add_attr('TRPZ-VLAN-Name',$attrib);}
> </AuthBy>
> </Handler>
> <Handler TunnelledByPEAP=1>
> <AuthBy FILE>
> EAPType MSCHAP-V2
> EAP_PEAP_MSCHAP_Convert 1
> </AuthBy>
> </Handler>
> <Handler>
> <AuthBy FILE>
> Filename %D/users
> EAPType PEAP
> EAPTLS_CAFile C:/Radiator/
> Radiator-3.15/certificates/demoCA/cacert.pem
> EAPTLS_CertificateFile C:/Radiator/
> Radiator-3.15/certificates/cert-srv.pem
> EAPTLS_CertificateType PEM
> EAPTLS_PrivateKeyFile C:/Radiator/
> Radiator-3.15/certificates/cert-srv.pem
> EAPTLS_PrivateKeyPassword whatever
> EAPTLS_MaxFragmentSize 1024
> AutoMPPEKeys
> SSLeayTrace 1
> EAPTLS_SessionResumptionLimit 10
> EAPTLS_PEAPVersion 1
> </AuthBy>
>
> </Handler>
> ################### end ofradius.cfg
> #########################################
>
> ################### userauth.pl
> #########################################
> sub
> {
> my $p = ${$_[0]};
> my $user = $p->get_attr('User-Name');
> $user =~ /(.*)\:(.*)/;
> my $user =$1;
> my $pass =$2;
> $user = "$user";
> $pass = "$pass";
> $p->change_attr('User-Name', $user);
> $p->change_attr('User-Password', $pass);
> $p->{DecodedPassword} = $pass;
> }
> ################### end of userauth.pl
> #########################################
>
>
>
> First sequences about PEAP communication are in the attached txt
> file...
> ################### OUTPUT - LOGFILEl
> #########################################
>
> *** Sending to 10.0.0.21 port 1645 ....
> Code: Access-Request
> Identifier: 1
> Authentic:
> >X<189><169><127><246><226><238><131><161><21><145>_Y><167>
> Attributes:
> User-Name = "adietrich"
> User-Password =
> <159>0<199><199>F:l<193><134><218><19><226><241><139><153>D
>
> Fri Nov 3 11:08:45 2006: DEBUG: AuthBy RADIUS result: IGNORE,
> Fri Nov 3 11:08:45 2006: DEBUG: EAP result: 2, EAP-MSCHAPV2
> converted to Radius MSCHAPV2 and redespatched to a Handler
> Fri Nov 3 11:08:45 2006: DEBUG: AuthBy FILE result: IGNORE, EAP-
> MSCHAPV2 converted to Radius MSCHAPV2 and redespatched to a Handler
> Fri Nov 3 11:08:45 2006: DEBUG: EAP result: 2, EAP PEAP inner
> authentication redespatched to a Handler
> Fri Nov 3 11:08:45 2006: DEBUG: AuthBy FILE result: IGNORE, EAP
> PEAP inner authentication redespatched to a Handler
> Fri Nov 3 11:08:46 2006: DEBUG: Packet dump:
>
>
> *** Received from 10.0.0.21 port 1645 ....
> Code: Access-Accept
> Identifier: 1
> Authentic: #<180><162>y9v<165><169>j<29><10>"f<159><14>.
> Attributes:
> Class =
> "SBR2CL<136><181><238><163><133><130><217><218><131><128><17><128>
> (<1><128><3><129><152><206><128><2><128><11><129><176><217><141><150><
> 171><209><228><233><177><218><128><18><128><14><129><136><181><238><16
> 3><133><130><217><218><131><128><128><128><129><216>"
> TRPZ-VLAN-Name = "default"
>
> Fri Nov 3 11:08:46 2006: DEBUG: Received reply in AuthRADIUS for
> req 1 from 10.0.0.21:1645
> Fri Nov 3 11:08:46 2006: DEBUG: Access accepted for adietrich:
> 1234600905
> Fri Nov 3 11:08:47 2006: DEBUG: Converted EAP-MSCHAPV2 response
> Packet dump:
> Code: Access-Accept
> Identifier: UNDEF
> Authentic:
> >X<189><169><127><246><226><238><131><161><21><145>_Y><167>
> Attributes:
> Class =
> "SBR2CL<136><181><238><163><133><130><217><218><131><128><17><128>
> (<1><128><3><129><152><206><128><2><128><11><129><176><217><141><150><
> 171><209><228><233><177><218><128><18><128><14><129><136><181><238><16
> 3><133><130><217><218><131><128><128><128><129><216>"
> TRPZ-VLAN-Name = "default"
> TRPZ-VLAN-Name = ""
>
> Fri Nov 3 11:08:47 2006: DEBUG: Access challenged for anonymous:
> Converted MSCHAPV2 authentication success
> Fri Nov 3 11:08:47 2006: DEBUG: Returned PEAP tunnelled packet dump:
> Code: Access-Challenge
> Identifier: UNDEF
> Authentic:
> vh<210>l<201><154><175><138><26>5w<159><230><174><136><221>
> Attributes:
>
> Fri Nov 3 11:08:47 2006: DEBUG: Access challenged for adietrich:
> 1234600905: EAP PEAP Inner authentication challenged
> Fri Nov 3 11:08:47 2006: DEBUG: Packet dump:
> *** Sending to 10.0.0.170 port 20007 ....
> Code: Access-Challenge
> Identifier: 9
> Authentic: S<17><172>8,O<148><17>s%ivtT<11>w
> Attributes:
> EAP-Message = <1><8><0><6><25><0>
> Message-Authenticator =
> <0><0><0><0><0><0><0><0><0><0><0><0><0><0><0><0>
>
> ################### end of OUTPUT - LOGFILEl
> #########################################
>
>
>
>
>
> Questions:
> Why is TRPZ-VLAN-Name not inside the final Access challenge to
> 10.0.0.170 ?
> And why isn't it an access accept instead of access challenge, send
> to the trapeze ?
>
> How do I send the Trapeze attribute VLAN-NAME in the OUTER
> AUTHENTICATION ?
>
> Why does Radiator uses the attribute Name TRPZ-VLAN-NAME instead of
> default naming VLAN-NAME ?
>
> Any suggestion for solving the main problem ? Bypassing the problem
> of mschap on client side without additional software on the client
> or changing the authentification server from RSA to vaso or kobil ?
>
>
>
>
>
>
>
> __________________________________________________
>
> Mit freundlichen Grüßen / Regards
>
> Andreas Dietrich
>
> Controlware GmbH
> Competence Center Communication Solutions
> Waldstrasse 92, 63128 Dietzenbach
>
> Büro: +49 (0)6074 858 545
> Mobil: +49 (0)172 6164633
> Andreas.Dietrich at controlware.de
> www.controlware.de
>
> State-of-the-art Technology for Worldwide Telecommunications
> __________________________________________________
>
>
> <output.txt>
NB:
Have you read the reference manual ("doc/ref.html")?
Have you searched the mailing list archive (www.open.com.au/archives/
radiator)?
Have you had a quick look on Google (www.google.com)?
Have you included a copy of your configuration file (no secrets),
together with a trace 4 debug showing what is happening?
--
Radiator: the most portable, flexible and configurable RADIUS server
anywhere. Available on *NIX, *BSD, Windows, MacOS X.
Includes support for reliable RADIUS transport (RadSec),
and DIAMETER translation agent.
-
Nets: internetwork inventory and management - graphical, extensible,
flexible with hardware, software, platform and database independence.
-
CATool: Private Certificate Authority for Unix and Unix-like systems.
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