[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Signing a message with S/MIME in Gnus?

From: Angel de Vicente
Subject: Signing a message with S/MIME in Gnus?
Date: Wed, 02 Nov 2022 09:29:26 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux)


anyone here familiar with Gnus + S/MIME + gnupg?

A few days back I decided to set up my environment to sign messages I
send out, and to be able to verify signatures of messages I receive.

Doing it with pgp was quite easy, and got it working in no time, but
S/MIME is giving me a real headache, most probably because I'm
misunderstanding something or because I lack some basic knowledge on how
certificates are meant to be used.

I imported my certificate with 'gpgsm --import <cert.p12>' and "gpgsm
-K" shows that the certificate got imported correctly:

| $ gpgsm -K
| /home/angelv/.gnupg/pubring.kbx
| -------------------------------
|            ID: 0xFD3C585C
|           S/N: 07A6ED8580BD2114605C7B37AB7B8919
|         (dec): 10171334757275596790721797340316535065
|        Issuer: /CN=AC FNMT Usuarios/OU=Ceres/O=FNMT-RCM/C=ES

My ~/.gnupg/gpgsm.con just contains:

| disable-crl-checks

and with that, I can sign a file in the command line without problems:

| $ gpgsm --sign test.txt >ciphertext
| gpgsm: Note: non-critical certificate policy not allowed
| gpgsm: Note: non-critical certificate policy not allowed
| gpgsm: Note: non-critical certificate policy not allowed
| gpgsm: CRLs not checked due to --disable-crl-checks option
| gpgsm: DBG: adding certificates at level -2
| gpgsm: signature created

But when I try to sign a message from Gnus I always get a message saying
"No sign key for <>; skip it? (y or n)"

What do I have to configure in Emacs/Gnus so that it will know that my
e-mail address is linked to the same certificate used in the command

By the way, I'm using the following:

| ArchLinux
| Emacs version: 28.2  (2022-09-12)
| Gnus  version: 5.13
| GnuPG version: 2.2.40

Any pointers/help greatly appreciated
Ángel de Vicente                 -- (GPG: 0x64D9FDAE7CD5E939)
 Research Software Engineer (Supercomputing and BigData)
 Instituto de Astrofísica de Canarias (

Attachment: signature.asc
Description: PGP signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]