WPA2 Enterprise Authentication Certificate Security

While reading up about WPA2-Enterprise, it states that it is more preferred over WPA2-Personal as it allows authentication via digital certificates which prevents over-the-air attacks.

However, I am unsure of the following implications about this implementation. If WPA2-Enterprise was to be implemented:

  • Can the authentication cert on machine A be dumped out, installed on machine B and use to authenticate to the network?
  • If let machine A was a domain user, but has local admin privileges is the above scenario still possible?
  • Can I issue unique certificates to each machine for authentication or do they have to request one during the authentication process?

Apologies in advance for the weird question, have no previous experience with WPA2-Enterprise at all!

authentication – SharePoint Online Auth Cookie TTL

See Here. I assume this is what your are trying to do… maybe not.
But, i think these two links are closer to what you may be looking for:

if none of these suit you, then you may be wading into the undocumented backwaters of O365 as seen here.

As per this link The SPOIDCRL cookie is refreshed on each page load.
You cannot alter the duration of the cookie’s existence in the Admin Console in SPO. Without knowing more about what you are trying to do, i cannot be more specific

Here is a general guide to security token expiration in O365, but the SPOIDCRL cookie is not enumerated in this link (nor are any other O365 cookies).

Please remember to Up Vote and Mark as an Answer if this helped you.

authentication – Why does message 1 of the WPA2 4 way handshake begin with the access point sending a random number?

This communication carries no information and could have come from any attacker.

Correct. But the server knows which random number (ANonce) it has sent and requires that the client does computations with this number and not with some other number set by the attacker. In other words: the ANonce is neither secret nor does it need to be protected. All what is needed is that it is defined by the server. The server uses the self-defined ANonce and not some attacker-defined ANonce when validating computations done by the client. Validating will only succeed if the client is using the server-defined ANonce and not the attacker-defined ANonce too.

Somewhere I am missing where the 4 way handshake proves the access point’s authenticity.

From Wikipedia:

The four-way handshake(8) is designed so that the access point (or authenticator) and wireless client (or supplicant) can independently prove to each other that they know the PSK/PMK, without ever disclosing the key. Instead of disclosing the key, the access point (AP) and client encrypt messages to each other—that can only be decrypted by using the PMK that they already share—and if decryption of the messages was successful, this proves knowledge of the PMK.

authentication – Enriching JWT after OpenID Connect flow

authentication – Enriching JWT after OpenID Connect flow – Software Engineering Stack Exchange

how can I tell if my postgresql instance supports kerberos/gssapi authentication

I installed it following instructions from digital ocean how-to-install-postgresql-on-ubuntu-20-04-quickstart

% sudo apt install postgresql postgresql-contrib

I also did a ‘show all’ in psql and didn’t see anything that suggested it was other than the krb_server_keyfile = /etc/krb5.keytab that I configured in postgresql.conf

These are the errors I see in the log:

2021-05-07 21:58:49.990 UTC [1434] postgres@postgres LOG:  accepting GSS security context failed
2021-05-07 21:58:49.990 UTC [1434] postgres@postgres DETAIL:  Unspecified GSS failure.  Minor code may provide more information: Key table entry not found
2021-05-07 21:58:49.990 UTC [1434] postgres@postgres FATAL:  GSSAPI authentication failed for user "postgres"
2021-05-07 21:58:49.990 UTC [1434] postgres@postgres DETAIL:  Connection matched pg_hba.conf line 114: "host postgres     postgres                               gs
s include_realm=0"
2021-05-07 21:58:49.993 UTC [1435] postgres@postgres LOG:  accepting GSS security context failed
2021-05-07 21:58:49.993 UTC [1435] postgres@postgres DETAIL:  Unspecified GSS failure.  Minor code may provide more information: Key table entry not found
2021-05-07 21:58:49.993 UTC [1435] postgres@postgres FATAL:  GSSAPI authentication failed for user "postgres"
2021-05-07 21:58:49.993 UTC [1435] postgres@postgres DETAIL:  Connection matched pg_hba.conf line 114: "host postgres     postgres                               gs
s include_realm=0"

authentication – Can Google authenticator be used to link all my accounts together?

Not at all.

Google Authenticator is just an application to generate TOTP. It’s easy to install, easy to use, so most people equals TOTP to Google Authenticator. The tokens you add are not tied to anything, not your email, nor your phone, nor anything.

It does not send any data anywhere. You can test it by putting your phone on Airplane Mode and opening it. All tokens for all your accounts will be updated every 30 seconds as always.

I usually don’t recommended using Google Authenticator because it lacked a way to export your tokens, so if you lost your phone, all your 2FA tokens were lost and you had to log into every site using a backup code to recreate the token. And if you replaced the phone you had to log on every site and do the same.

So you can use it without worrying about anything leaking about your accounts.

c# – Correct way to handle client request authentication

I would like to get your opinion on the problem I am having, my question on SO was closed so I think this forum might be more fitting.

I am currently developing a API using .NET 5 and C#. The problem I am facing is that the clients I need to GET/POST etc. to require different types of authentication, being:

  • API Key
  • Client certificate
  • OAuth

Each of the clients have at least one of these and maybe two (API Key + other). I am struggling to figure out how to implement these calls. I have thought of a few ideas but I am not sure if any of them will actually suffice. I am using HttpClient to make the calls to the external clients. These will all come from a single service or controller. I cannot split them out into a different service or controller for each type of auth.

Here is what I have thought of:

  • Using an if or switch statement, apply the necessary configuration depending on the required auth type. This is by far the worst idea, there will be so much repetition. No DRY here.
  • Using HttpClient handlers. In effect, creating three handlers (one for each type of auth) and letting the request activate the correct handler when it is being passed through.
  • Using a typed client. But this only allows one HttpClient to be related to a single service. I need all three to be available to any service.
  • Using simple middleware in the API to handle the requests and their authentication as necessary.

Does anyone have any suggestions on how to do this and if any of the above methods would be preferable?

2.3 gingerbread – Why are Google authentication consent screen buttons disabled on an Android 2.3 phone?

I want to use an old Galaxy Ace which runs Android 2.3 as a camera. I installed the Alfred camera app on it which requires Google login in order to connect the camera and the viewer device securely.

I can log in successfully with the Alfred app to Google, but then there is a consent screen to allow the app to access my account data and both buttons are disabled like here on this picture taken from the net.

enter image description here

Why is it that loggging in works, but I cannot proceed from the consent screen? How can this be fixed?

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