[horde] Setup OAuth2 with Horde-Imp

Louis-Philippe Allard lp.allard.1 at gmail.com
Sun May 8 19:30:24 UTC 2022

  Quoting Michael J Rubinsky <mrubinsk at horde.org>:

> Quoting Louis-Philippe Allard <lp.allard.1 at gmail.com>:
>> Hello,
>> I am trying to setup Protonmail and their bridge to replace GMail  
>> as Horde's email backend server on my selfhosted VPS.  However its  
>> looking more complicated than expected (sigh).
>> In the meantime, I have until May 30th to setup OAuth2 to be able  
>> to continue using Gmail. Thanks Google...
>> However, I cannot find any instructions on how to do so, and the  
>> maillist is very quiet these days.
>> The way my system is setup is that Gmail's credentials are used by  
>> IMP for Horde's authentication (hordeauth => true in  
>> imp/backends.local.php).
>> GMail's IMAP server is setup also in imp/backends.local.php  
>> (imap.gmail.com:993) and to send emails, Gmail's SMTP server is  
>> setup under Horde's config > Mailer section (smtp.gmail.com:587).
>> Just to be sure I understand the "mechanics" involved here, can  
>> someone just confirm this statement:  On my setup, IMP passes the  
>> credentials received at the login page to GMail's server which  
>> accepts them.  IMP receiving a successful reply from GMail, it lets  
>> the user enter (authenticate) into Horde.  Email sync'ing (folder  
>> structure, receiving emails, etc) is done via the IMP's  
>> backends.local.php (IMAP section), and sending email from this VPS  
>> is accomplished via the Mailer section of Horde using GMail's SMTP  
>> server.
> This is correct in a general sense, yes.
>> Everything else in Horde (calendar, contacts, task lists, notes,  
>> tickets, etc) has never been setup to be stored remotely.  It is  
>> stored in Horde's MYSQL database.
>> If I lose connectivity to GMail, I CANNOT LOGIN to Horde.  This is  
>> a major issue.
>> I need IMP to handle OAuth2 to be able to use GMail's IMAP.
> The good news is that our IMAP client supports the required XOAUTH  
> mechanism that Google's IMAP servers require. The bad news is that  
> neither Horde or IMP has been modified to use that yet.
>> I need Horde to handle OAuth2 to be able to use GMail's SMTP.
>> Question 1:  How can I setup a local authentication that would NOT  
>> rely on external servers?  This VPS is behind a strong FW so I am  
>> OK with standard USR:PSW combination.
> Pick another authentication option, like "SQL". Note that this won't  
> allow you to use IMP in your current setup.
>> Question 2:  Is it possible to setup OAuth2 to be able to use  
>> GMail's IMAP and SMTP servers?
> Possible? Yes, but will require work in Horde and IMP to take  
> advantage of our IMAP client's capabilities.
>> Hopefully the maillist is still alive and well  and someone can  
>> guide/help me!
>> Thank you !!
>> Louis-Philippe Allard
>> lp.allard.1 at gmail.com
>> Sent using Horde Groupware on GNU/Linux
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> --
> mike
> The Horde Project
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Thanks for the reply Michael,

Okay I changed the auth backend to MySQL, using my GMail creds I can  
login to horde without having IMP connect to Gmail.  This is good as  
at least I will have access to my other functions (Kronolith, etc).

For Horde/Imp not modified to use XOauth, is this something that you'd  
think would be under way, or are we looking at months/years of  
  Louis-Philippe Allard
lp.allard.1 at gmail.com
Sent using Horde Groupware on GNU/Linux

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