Re: AW: brcmfmac: how to setup SAE on RPi // Re: [PATCH] wifi: brcmsmac: advertise MFP_CAPABLE to enable WPA3

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On July 8, 2024 1:33:02 PM "Dembianny Sven (BSH GDE-EDSD5)" 
<[email protected]> wrote:

>> On Thu, Jun 27, 2024 at 6:34 AM KeithG <[email protected]> wrote:
>>>
>>> On Thu, Jun 27, 2024 at 12:01 AM Arend Van Spriel
>>> <arend.vanspriel-dY08KVG/lbpWk0Htik3J/[email protected]> wrote:
>>>>
>>>> On June 27, 2024 12:47:02 AM KeithG <[email protected]> wrote:
>>>>
>>>>> On Wed, Jun 26, 2024 at 7:30 AM Arend Van Spriel
>>>>> <arend.vanspriel-dY08KVG/lbpWk0Htik3J/[email protected]> wrote:
>>>>>>
>>>>>> On June 26, 2024 2:05:07 PM KeithG <[email protected]> wrote:
>>>>>>
>>>>>>> On Wed, Jun 26, 2024 at 2:48 AM Arend Van Spriel
>>>>>>> <arend.vanspriel-dY08KVG/lbpWk0Htik3J/[email protected]> wrote:
>>>>>>>>
>>>>>>>> On June 21, 2024 2:24:19 PM KeithG <[email protected]> wrote:
>>>>>>>>
>>>>>>>>> On Fri, Jun 21, 2024 at 4:09 AM Arend van Spriel
>>>>>>>>> <arend.vanspriel-dY08KVG/lbpWk0Htik3J/[email protected]> wrote:
>>>>>>>>>>
>>>>>>>>>> + Jouni
>>>>>>>>>>
>>>>>>>>>> On 6/20/2024 8:25 PM, KeithG wrote:
>>>>>>>>>>> 1718907734.308740: wlan0: WPA: AP group 0x10 network profile
>>>>>>>>>>> group 0x18; available group 0x10
>>>>>>>>>>> 1718907734.308748: wlan0: WPA: using GTK CCMP
>>>>>>>>>>> 1718907734.308758: wlan0: WPA: AP pairwise 0x10 network
>>>>>>>>>>> profile pairwise 0x10; available pairwise 0x10
>>>>>>>>>>> 1718907734.308767: wlan0: WPA: using PTK CCMP
>>>>>>>>>>> 1718907734.308772: wlan0: WPA: AP key_mgmt 0x400 network
>>>>>>>>>>> profile key_mgmt 0x400; available key_mgmt 0x0
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I suspect the message above indicates the problem as there is
>>>>>>>>>> no available key_mgmt to select so looked it up in the code and here it is:
>>>>>>>>>>
>>>>>>>>>> sel = ie.key_mgmt & ssid->key_mgmt; #ifdef CONFIG_SAE if
>>>>>>>>>> ((!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SAE) &&
>>>>>>>>>> !(wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_SAE_OFFLOAD_STA)) ||
>>>>>>>>>> wpas_is_sae_avoided(wpa_s, ssid, &ie)) sel &=
>>>>>>>>>> ~(WPA_KEY_MGMT_SAE | WPA_KEY_MGMT_SAE_EXT_KEY |
>>>>>>>>>> WPA_KEY_MGMT_FT_SAE | WPA_KEY_MGMT_FT_SAE_EXT_KEY); #endif /*
>>>>>>>>>> CONFIG_SAE */ #ifdef CONFIG_IEEE80211R if (!(wpa_s->drv_flags
>>>>>>>>>> & (WPA_DRIVER_FLAGS_SME |
>>>>>>>>>>         WPA_DRIVER_FLAGS_UPDATE_FT_IES))) sel &=
>>>>>>>>>> ~WPA_KEY_MGMT_FT; #endif /* CONFIG_IEEE80211R */
>>>>>>>>>> wpa_dbg(wpa_s, MSG_DEBUG,
>>>>>>>>>> "WPA: AP key_mgmt 0x%x network profile key_mgmt 0x%x;
>>>>>>>>>> available key_mgmt 0x%x", ie.key_mgmt, ssid->key_mgmt, sel);
>>>>>>>>>>
>>>>>>>>>> So 0x400 matches the expectation:
>>>>>>>>>>
>>>>>>>>>> #define WPA_KEY_MGMT_SAE BIT(10)
>>>>>>>>>>
>>>>>>>>>> You already confirmed that the driver reports SAE and SAE
>>>>>>>>>> offload support. So it seems wpas_is_sae_avoided() must
>>>>>>>>>> return true. That will check whether the AP and network
>>>>>>>>>> profile are setup to MFP. This seems to be the fact as your
>>>>>>>>>> hostapd.conf and wpa_supplicant.conf both have
>>>>>>>>>> ieee80211w=2 defined. This function can only return true when
>>>>>>>>>> is enabled in configuration file:
>>>>>>>>>>
>>>>>>>>>> # sae_check_mfp: Require PMF support to select SAE key_mgmt #
>>>>>>>>>> 0 = Do not check PMF for SAE (default) # 1 = Limit SAE when
>>>>>>>>>> PMF is not enabled # # When enabled SAE will not be selected
>>>>>>>>>> if PMF will not be used # for the connection.
>>>>>>>>>> # Scenarios where this check will limit SAE:
>>>>>>>>>> #  1) ieee80211w=0 is set for the network #  2) The AP does
>>>>>>>>>> not have PMF enabled.
>>>>>>>>>> #  3) ieee80211w is unset, pmf=1 is enabled globally, and
>>>>>>>>>> #     the device does not support the BIP cipher.
>>>>>>>>>> # Consider the configuration of global parameterss
>>>>>>>>>> sae_check_mfp=1,
>>>>>>>>>> pmf=1 and a
>>>>>>>>>> # network configured with ieee80211w unset and key_mgmt=SAE WPA-PSK.
>>>>>>>>>> # In the example WPA-PSK will be used if the device does not
>>>>>>>>>> support # the BIP cipher or the AP has PMF disabled.
>>>>>>>>>> # Limiting SAE with this check can avoid failing to associate
>>>>>>>>>> to an AP # that is configured with sae_requires_mfp=1 if the
>>>>>>>>>> device does # not support PMF due to lack of the BIP cipher.
>>>>>>>>>>
>>>>>>>>>> The default is not to check it and you wpa_supplicant.conf
>>>>>>>>>> does not specify it.
>>>>>>>>>>
>>>>>>>>>> # cat /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
>>>>>>>>>> ctrl_interface=DIR=/run/wpa_supplicant GROUP=netdev
>>>>>>>>>> update_config=1
>>>>>>>>>> network={
>>>>>>>>>> ssid="deskSAE"
>>>>>>>>>> sae_password="secret123"
>>>>>>>>>> proto=RSN
>>>>>>>>>> key_mgmt=SAE
>>>>>>>>>> pairwise=CCMP
>>>>>>>>>> ieee80211w=2
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> $ cat /etc/hostapd/hostapd.conf # interface and driver
>>>>>>>>>> interface=ap0
>>>>>>>>>> driver=nl80211
>>>>>>>>>>
>>>>>>>>>> # WIFI-Config
>>>>>>>>>> ssid=deskSAE
>>>>>>>>>> channel=1
>>>>>>>>>> hw_mode=g
>>>>>>>>>>
>>>>>>>>>> wpa=2
>>>>>>>>>> wpa_key_mgmt=SAE
>>>>>>>>>> wpa_pairwise=CCMP
>>>>>>>>>> sae_password=secret123
>>>>>>>>>> sae_groups=19
>>>>>>>>>> ieee80211w=2
>>>>>>>>>> sae_pwe=0
>>>>>>>>>>
>>>>>>>>>> Regards,
>>>>>>>>>> Arend
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>> 1718907734.308779: wlan0: WPA: Failed to select
>>>>>>>>>>> authenticated key management type
>>>>>>>>>>> 1718907734.308787: wlan0: WPA: Failed to set WPA key
>>>>>>>>>>> management and encryption suites
>>>>>>>>>
>>>>>>>>> Arend,
>>>>>>>>>
>>>>>>>>> I find the wpa_supplicant docs really hard to understand. I
>>>>>>>>> have read through your response a few times and am still a bit
>>>>>>>>> confused. Does this have to do with a pure wpa3 versus a wpa2/3 AP?
>>>>>>>>
>>>>>>>> Correct. If I am not mistaken MFP aka PMF aka 802.11w is mandatory for WPA3.
>>>>>>>>
>>>>>>>>> I have tried editing my hostapd.conf and my
>>>>>>>>> wpa_supplicant.conf and still cannot get a connection, so I must be doing 
>>>>>>>>> something wrong.
>>>>>>>>> I commented the ieee80211w line on both and it would not connect.
>>>>>>>>> I tried changing the wpa_key_mgmt on both ends to be 'SAE
>>>>>>>>> WPA_PSK' and it still would not connect.
>>>>>>>>>
>>>>>>>>> What *should* the configurations be in the hostapd.conf and
>>>>>>>>> wpa_supplicant.conf to negotiate this as a pure wpa3 setup?
>>>>>>>>> What should it be to be a wpa2/3 setup? My phone worked fine
>>>>>>>>> to connect with the original hostapd setup, but I have no idea
>>>>>>>>> what it is doing
>>>>>>>>
>>>>>>>> As I mentioned in my previous email both config files listed
>>>>>>>> above look okay to me (might be wrong though). The problem
>>>>>>>> seems to be with wpas_is_sae_avoided(). For it to return true the config 
>>>>>>>> should have:
>>>>>>>>
>>>>>>>> sae_check_mfp=1
>>>>>>>>
>>>>>>>> But you don't have that and default is 0 so it should check for
>>>>>>>> MFP. This is where my trail ends. To learn more I would add additional 
>>>>>>>> debug prints.
>>>>>>>> Are you comfortable rebuilding wpa_supplicant from source?
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Arend
>>>>>>>
>>>>>>> Arend,
>>>>>>>
>>>>>>> Thanks for the reply. I could try to rebuild wpa_supplicant from
>>>>>>> source. This is on RPi, so debian *.debs which are a pain, but I
>>>>>>> think I can do it.
>>>>>>>
>>>>>>> Do I understand correctly that 'sae_check_mfp=1' is supposed to
>>>>>>> be in the hostapd.conf and wpa_supplicant.conf? I can try that
>>>>>>> and see if anything changes.
>>>>>>
>>>>>> Ok. We can try first to put following in wpa_supplicant.conf:
>>>>>>
>>>>>> sae_check_mfp=0
>>>>>>
>>>>>> Let me know if that makes any difference.
>>>>>>
>>>>>>> Why would I have to re-build wpa_supplicant?
>>>>>>
>>>>>> I would provide a patch with additional debug prints so I get
>>>>>> better understanding what is going wrong. Would be great if you
>>>>>> can apply that and rebuild.
>>>>>>
>>>>>> Regards,
>>>>>> Arend
>>>>> Arend,
>>>>>
>>>>> I was able to try it this afternoon.
>>>>> My hostapd is still:
>>>>> # interface and driver
>>>>> interface=ap0
>>>>> driver=nl80211
>>>>>
>>>>> # WIFI-Config
>>>>> ssid=deskSAE
>>>>> channel=1
>>>>> hw_mode=g
>>>>>
>>>>> wpa=2
>>>>> wpa_key_mgmt=SAE
>>>>> wpa_pairwise=CCMP
>>>>> sae_password=secret123
>>>>> sae_groups=19
>>>>> ieee80211w=2
>>>>> sae_pwe=0
>>>>>
>>>>> and I can still connect from my phone to this AP.
>>>>>
>>>>> I tried this as my /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
>>>>> ctrl_interface=DIR=/run/wpa_supplicant GROUP=netdev
>>>>> update_config=1
>>>>> network={
>>>>> ssid="deskSAE"
>>>>> sae_password="secret123"
>>>>> proto=RSN
>>>>> key_mgmt=SAE
>>>>> pairwise=CCMP
>>>>> ieee80211w=2
>>>>> sae_check_mfp=1
>>>>> }
>>>>>
>>>>> and when I try to connect, I get:
>>>>> # wpa_supplicant -i wlan0 -c
>>>>> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
>>>>> Successfully initialized wpa_supplicant Line 10: unknown network
>>>>> field 'sae_check_mfp'.
>>>>> Line 11: failed to parse network block.
>>>>
>>>> Right. The setting sae_check_mfp is a global setting like
>>>> update_config. So it should be moved outside the network block.
>>>>
>>>> Regards,
>>>> Arend
>>> Arend,
>>>
>>> Thanks for the hand holding, I am out of my depth here!
>>>
>>> I tried this config and get a similar result.
>>> ctrl_interface=DIR=/run/wpa_supplicant GROUP=netdev
>>> update_config=1
>>> sae_check_mfp=1
>>> network={
>>> ssid="deskSAE"
>>> sae_password="secret123"
>>> proto=RSN
>>> key_mgmt=SAE
>>> pairwise=CCMP
>>> ieee80211w=2
>>> }
>>> # wpa_supplicant -i wlan0 -c
>>> /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
>>> Successfully initialized wpa_supplicant Line 3: unknown global field
>>> 'sae_check_mfp=1'.
>>> Line 3: Invalid configuration line 'sae_check_mfp=1'.
>>> Failed to read or parse configuration
>>> '/etc/wpa_supplicant/wpa_supplicant-wlan0.conf'.
>>> : CTRL-EVENT-DSCP-POLICY clear_all
>>>
>>> seems it doesn't recognize this parameter.
>>>
>>> Keith
>>
>> Replying to my own post.
>> I re-built wpa_supplicant from the current git:
>> # wpa_supplicant -v
>> wpa_supplicant v2.11-devel-hostap_2_10-2215-gc9db4925f
>> Copyright (c) 2003-2022, Jouni Malinen <[email protected]> and contributors
>>
>> It now seems to recognize the 'sae_check_mfp' parameter, but still does not 
>> connect:
>> # wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0.conf
>> Successfully initialized wpa_supplicant
>> wlan0: Trying to associate with SSID 'deskSAE'
>> wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:00:00:00:00:00 status_code=16
>> wlan0: Added BSSID d8:3a:dd:60:a3:0c into ignore list, ignoring for 10 seconds
>> wlan0: Removed BSSID d8:3a:dd:60:a3:0c from ignore list (clear)
>> wlan0: Trying to associate with SSID 'deskSAE'
>> wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:00:00:00:00:00 status_code=16
>> wlan0: Added BSSID d8:3a:dd:60:a3:0c into ignore list, ignoring for 10 seconds
>> wlan0: Removed BSSID d8:3a:dd:60:a3:0c from ignore list (clear)
>> wlan0: Trying to associate with SSID 'deskSAE'
>> wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:00:00:00:00:00 status_code=16
>> wlan0: Added BSSID d8:3a:dd:60:a3:0c into ignore list, ignoring for 10 seconds
>> wlan0: Removed BSSID d8:3a:dd:60:a3:0c from ignore list (clear)
>> wlan0: Trying to associate with SSID 'deskSAE'
>> wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:00:00:00:00:00 status_code=16
>> wlan0: Added BSSID d8:3a:dd:60:a3:0c into ignore list, ignoring for 10 seconds
>> wlan0: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="deskSAE"
>> auth_failures=1 duration=10 reason=CONN_FAILED
>> wlan0: CTRL-EVENT-SSID-REENABLED id=0 ssid="deskSAE"
>> wlan0: BSSID d8:3a:dd:60:a3:0c ignore list count incremented to 2, ignoring 
>> for 10 seconds
>> wlan0: Removed BSSID d8:3a:dd:60:a3:0c from ignore list (clear)
>> wlan0: Trying to associate with SSID 'deskSAE'
>> wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:00:00:00:00:00 status_code=16
>> wlan0: Added BSSID d8:3a:dd:60:a3:0c into ignore list, ignoring for 10 seconds
>> wlan0: CTRL-EVENT-SSID-TEMP-DISABLED id=0 ssid="deskSAE"
>> auth_failures=2 duration=20 reason=CONN_FAILED
>> ^Cp2p-dev-wlan0: CTRL-EVENT-DSCP-POLICY clear_all
>> p2p-dev-wlan0: CTRL-EVENT-DSCP-POLICY clear_all
>> nl80211: deinit ifname=p2p-dev-wlan0 disabled_11b_rates=0
>> p2p-dev-wlan0: CTRL-EVENT-TERMINATING
>> wlan0: CTRL-EVENT-DSCP-POLICY clear_all
>> wlan0: Removed BSSID d8:3a:dd:60:a3:0c from ignore list (clear)
>> wlan0: CTRL-EVENT-DSCP-POLICY clear_all
>> nl80211: deinit ifname=wlan0 disabled_11b_rates=0
>> wlan0: CTRL-EVENT-TERMINATING
>>
>> I tried setting the 'sae_check_mfp' to both 1 and 0 and still cannot 
>> connect with this 'current' version of
>> wpa_supplicant.
>>
>> Keith
> Hi Keith,
>
> maybe you are missing sae_pwe=2 in your wpa_supplicant.conf
> At least in our setup it works.

I think Keith already reported success in earlier email.

@Keith: If I am mistaken let me know.

Regards,
Arend




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