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Authenticated relay using OAUTH2?
exim-users at exim
Jul 26, 2022, 11:30 AM
Post #1 of 2 (198 views)
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I need to relay to an Exchange server that's about to be configured to
require "modern authentication," that is, OAUTH2. Is there some way
to configure Exim to authenticate *as a client* using OAUTH2?

I built an OAUTH2 plugin for Cyrus SASL and tried it, but it appears
that Exim's Cyrus SASL driver doesn't have a client side at all?

--
Mark H. Wood
Lead Technology Analyst

University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu

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Re: Authenticated relay using OAUTH2? [ In reply to ]
exim-users at exim
Aug 1, 2022, 4:15 AM
Post #2 of 2 (198 views)
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On 26/07/2022 19:30, Mark H. Wood via Exim-users wrote:
> I need to relay to an Exchange server that's about to be configured to
> require "modern authentication," that is, OAUTH2. Is there some way
> to configure Exim to authenticate *as a client* using OAUTH2?
>
> I built an OAUTH2 plugin for Cyrus SASL and tried it, but it appears
> that Exim's Cyrus SASL driver doesn't have a client side at all?

https://connect2id.com/learn/oauth-2
says
"OpenID Connect is a concrete protocol for authenticating users,
devised on top of the OAuth 2.0 framework.
As such OpenID Connect is also often called a profile of OAuth 2.0."

https://www.gnu.org/software/gsasl/manual/gsasl.html#OPENID20
might be of interest, if your Exchange supports that profile.
--
Cheers,
Jeremy

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