[strongSwan] Strongswan client support for the XAUTH_PASSCODE attribute

[Noel Kuntze]

Hi,

There's just no frontend to ask dynamically for such credentials yet. You'd need to implement that, then you can dynamically prompt for the passcode (after hooking up X_CODE the same way as X_USER is). Other than that, there are no provisions for X_CODE or anything else. The code base wouldn't be extended particularly for X_CODE because IKEv1 is deprecated.

Kind regards

Noel

Am 01.04.20 um 18:22 schrieb MN Lists:
> Hi,
> 
> This is my first message to the list so sorry in advance if the answer is obvious or well-known.
> Also, sorry if my terminology is messed up, hopefully you will understand my issue.
> 
> I have a Juniper ScreenOS gateway that does IKEv1 VPNs with RSA and then XAuth authentication
> towards an RSA SecurID box. SecurID is an MFA implementation with hardware tokens that display
> a new 6-digit number every 60 seconds.
> 
> Clients can connect to it from Mac OS X with a client called NCP Secure Entry and from Windows
> with the Shrewsoft client. In the past vpnc on Linux was working but as it has not been developed
> since a long time and doesn't support newer algorithms, I'm looking for an alternative and
> Strongswan looks promising.
> 
> So far I have been able to get IKE phase1 up but it fails on XAuth. It looks as if the gateway
> is sending a request for X_USER and X_CODE but charon is responding with just X_USER. Here is
> a log excerpt:
> 
> apr 01 17:48:08 phoenix charon-debug[21177]: 02[IKE] authentication of 'gw.example.com' with RSA_EMSA_PKCS1_NULL successful
> apr 01 17:48:08 phoenix charon-debug[21177]: 02[IKE] activating new tasks
> apr 01 17:48:08 phoenix charon-debug[21177]: 02[IKE] nothing to initiate
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[NET] received packet: from 212.112.174.86[4500] to 172.20.33.34[4500] (92 bytes)
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE] next IV for MID 3123281050 => 16 bytes @ 0x7f0304001ed0
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]    0: 51 2C 54 DC D7 31 2D 5F 5D 84 00 10 81 42 88 2B  Q,T..1-_]....B.+
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[ENC] parsed TRANSACTION request 3123281050 [ HASH CPRQ(X_TYPE X_USER X_CODE) ]
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE] Hash => 32 bytes @ 0x7f03040026b0
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]    0: 87 1C CA 53 F3 1A 81 40 E3 68 E8 78 EA 1C CF CE  ...S... at .h.x....
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]   16: B3 53 17 C6 8C 1B E7 F3 CA DD 50 DC F7 60 97 DD  .S........P..`..
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE] next IV for MID 3123281050 => 16 bytes @ 0x7f02f8005600
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]    0: 33 C2 3E 9C 64 14 4C 87 85 C2 1B 26 45 84 2D FF  3.>.d.L....&E.-.
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE] Hash => 32 bytes @ 0x7f0304001ed0
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]    0: CB A7 62 8F 3F E0 98 7B 92 75 7F AE 70 B6 E4 0C  ..b.?..{.u..p...
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[IKE]   16: 9E B8 66 14 91 79 63 45 5C 9E B1 EF FD B3 5F B9  ..f..ycE\....._.
> apr 01 17:48:11 phoenix charon-debug[21177]: 07[ENC] generating TRANSACTION response 3123281050 [ HASH CPRP(X_USER) ]
> 
> Relevant swanctl authentication and secret sections are:
> 
> connections {
>     conn1 {
>         local-2 {
>             auth = xauth-generic
>             xauth_id = xauthuser
>         }
>     }
> }
> 
> secrets {
>         xauth-1 {
>                 id-1 = xauthuser
>                 secret = 1234556677
>         }
> 
> Is this a well known deficiency in strongswan or is there some configuration that can make
> this work?
> 
> I'm happy to supply any further information that could help resolve this.
> 
> Many thanks,
> /Mikael
> 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://lists.strongswan.org/pipermail/users/attachments/20200401/29ad7050/attachment.sig>