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bug#26587: 26.0.50; Gnus signs with false S/MIME key
From: |
Lars Ingebrigtsen |
Subject: |
bug#26587: 26.0.50; Gnus signs with false S/MIME key |
Date: |
Wed, 09 Oct 2019 21:59:34 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Torsten Bronger <bronger@physik.rwth-aachen.de> writes:
> When writing the message, I call (mml-secure-message-sign-smime).
> The "From:" field contains "Torsten Bronger
> <bronger@physik.rwth-aachen.de>". My secret keys are:
OK, my first attempt at this ended up with Message not complaining at
all, but sending out a "signed" message with the following empty
signature:
--=-=-=
Content-Type: application/pkcs7-signature; name=smime.p7s
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=smime.p7s
--=-=-=--
I've now made it bug out if it can't find any identity to sign with.
Now, for the bug you're seeing... If I'm tracing the code right (and I
may well not be), this is what's used to find what name to sign with:
(defun mml-secure-signer-names (protocol sender)
"Determine signer names for PROTOCOL and message from SENDER.
Returned names may be e-mail addresses or key IDs and are determined based
on `mml-secure-openpgp-signers' and `mml-secure-openpgp-sign-with-sender' with
OpenPGP or `mml-secure-smime-signers' and `mml-secure-smime-sign-with-sender'
with S/MIME."
(if (eq 'OpenPGP protocol)
(append mml-secure-openpgp-signers
(if (and mml-secure-openpgp-sign-with-sender sender)
(list (concat "<" sender ">"))))
(append mml-secure-smime-signers
(if (and mml-secure-smime-sign-with-sender sender)
(list (concat "<" sender ">"))))))
mml-secure-smime-sign-with-sender defaults to nil, so it's normally not
used. So this returns just the value of mml-secure-smime-signers.
What's that variable for you?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no