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Re: iwlwifi GTK rekey is not working with WPA3 SAE encryption

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On 10/21/2024 6:45 PM, Johannes Berg wrote:
> On Mon, 2024-10-21 at 18:35 +0800, Baochen Qiang wrote:
>>>>
>>>> Oct 21 17:50:17 xps13 kernel: [  153.758773] iwlwifi 0000:00:14.3: loaded firmware version 77.0b4c06ad.0 Qu-c0-hr-b0-77.ucode op_mode iwlmvm
>>>
>>> Huh, I'm surprised you have that version :)
>> i just upgrade to the latest linux-firmware repo :)
> 
> Oh, didn't realize that was released there already.
> 
>>> Hm. Support for SAE AKMs should've been backported, so that's a bit odd.
>>> What's the AKM in use, ciphers, etc.?
>> i am not familiar with 802.11 security, guessing it is SAE & CCMP?
>>
>> here is M2 in 4-way handshake:
>>
> 
> Can you also capture the rekeying M1?
this is rekey M1:

802.1X Authentication
    Version: 802.1X-2004 (2)
    Type: Key (3)
    Length: 159
    Key Descriptor Type: EAPOL RSN Key (2)
    [Message number: 1]
    Key Information: 0x1380
        .... .... .... .000 = Key Descriptor Version: Unknown (0)
        .... .... .... 0... = Key Type: Group Key
        .... .... ..00 .... = Key Index: 0
        .... .... .0.. .... = Install: Not set
        .... .... 1... .... = Key ACK: Set
        .... ...1 .... .... = Key MIC: Set
        .... ..1. .... .... = Secure: Set
        .... .0.. .... .... = Error: Not set
        .... 0... .... .... = Request: Not set
        ...1 .... .... .... = Encrypted Key Data: Set
        ..0. .... .... .... = SMK Message: Not set
    Key Length: 0
    Replay Counter: 5
    WPA Key Nonce: 0000000000000000000000000000000000000000000000000000000000000000
    Key IV: 00000000000000000000000000000000
    WPA Key RSC: 0000000000000000
    WPA Key ID: 0000000000000000
    WPA Key MIC: 8ea97cf0e8547fdaa82432f8fc0ea23b
    WPA Key Data Length: 64
    WPA Key Data: ac3e43897dfc934f8f84d58e6fa5bd6c26ae666a29892de0a30d43c7dc7a063ac6b5884718d8945274c0df6559e48c861efec804b5be920bd5550c43b0889ea0


> 
> johannes





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