Re: Using pgadmin as an OAuth2 proxy for PostgreSQL

[Samed YILDIRIM <samed@xxxxxxxxxx>]

Hi Tobias, Ron,

On Mon, 19 Dec 2022 at 16:50, Ron <ronljohnsonjr@xxxxxxxxx> wrote:

Why not authenticate Postgresql users directly to AD using GSSAPI?

Despite its name, Azure AD is not an Active Directory. It doesn't support LDAP and Kerberos out of box.

I have done the implementation you are looking for. I need to dig into my backups to find it. Therefore, if you are ready to cook by yourself, I'm giving the recipe rather than the food :)

You need to have full control over the operating system that PostgreSQL runs on. Otherwise, it won't work for you.

PostgreSQL supports PAM authentication. And, PAM supports running arbitrary executables thanks to pam_exec module. There are many applications of Azure AD authentication written in many programming languages. I used one[1] of them written in Python as an example. And, I wrote a python script that validates users' credentials. The rest is simple. I created a user group, aad, in PostgreSQL and added developers to that user group. If they are a member of that group, they are authenticated against Azure AD thanks to pg_hba.conf file :) I'm adding 2 lines below as an example.

local      all          +aad                               pam pamservice=postgresql-pam-aad
hostssl    all          +aad       0.0.0.0/0               pam pamservice=postgresql-pam-aad

[1]: https://github.com/samedyildirim/openvpn-azure-ad-auth

[2]: https://www.postgresql.org/docs/15/auth-pam.html

Best regards.

Samed YILDIRIM

On 12/19/22 07:12, Rettstadt, Tobias wrote:

Hi all,

 

our current project has the requirement that users should get read access to our backend databases. The users are stored in Azure AD and my first idea was to use OAuth2 / OIDC to authenticate the users. Since pgadmin provides OAuth2 authentication, is it possible to somehow map roles in the access token that we get from Azure AD to a Postgres user in pgadmin, so that the users can just log into using their Azure AD account and then get access to a number of databases that I have configured?

 

I already tried the OAuth2 login in pgadmin and it’s working fine, but I haven’t figured out how to deploy the database credentials. I know that I could use a password file, but it has to be located in the storage directory of the user, where he could download it using the storage manager. Since users should not be able to access the password, we cannot use this. It would also be feasible if the owner of the password would have to enter the password on the machine of each of the users, but even if I select “Save password”, the password is not saved, even though master passwords and password saving are activated in the config.

 

We are running the latest Docker image dpage/pgadmin4 in a Kubernetes cluster. The pgadmin version is 6.17.

 

Thanks in advance for your help and best regards,

Tobias

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