[strongSwan] Strongswan client support for the XAUTH_PASSCODE attribute

[mnlists at frimail.net]

Hi,

But the NetworkManager plugin could prompt for a passcode couldn't it?

Best regards,

/Mikael

On 2020-04-01 19:19, Noel Kuntze wrote:
> Hi,
> 
> Yw.
> 
> There's also no support for dynamic prompting for EAP credentials.
> I envisioned to implement that using VICI some time later. It'd be the natural choice.
> Switching to IKEv2 won't solve the problem for you right now.
> 
> Kind regards
> 
> Noel
> 
> Am 01.04.20 um 19:10 schrieb Mikael Nordstrom:
>> OK,
>>
>> Thanks anyway for the quick reply.
>>
>> The Juniper has IKEv2 support and the RSA SecurID box has a built-in radius server
>> so maybe that is the way to go with this.
>>
>> Thanks again,
>>
>> /Mikael
>>
>> On 2020-04-01 18:30, Noel Kuntze wrote:
>>> 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
>>>>
>>>
>