bug#40118: 27.0.90; Signing emails with gpg

["Štěpán Němec" <stepnem@gmail.com>]

On Wed, 18 Mar 2020 14:51:10 +0000
Sharon Kimble wrote:

> When I have -
>   --8<---------------cut here---------------start------------->8---
> (add-hook 'gnus-message-setup-hook 'mml-secure-message-sign)
> (add-hook 'message-setup-hook 'mml-secure-message-sign)
>
> enabled in emacs26.3 up pops a pinentry box and I input my code and the message sends.
>
> However in 27.0.90 I get this crash report -
>
> Debugger entered--Lisp error: (error "Couldn’t find any signer names; try setting `mml-s...")
>   signal(error ("Couldn’t find any signer names; try setting `mml-s..."))
>   error("Couldn't find any signer names%s" "; try setting `mml-secure-smime-sign-with-sender'.")
>   mml-secure-epg-sign(OpenPGP t)
>   mml2015-epg-sign((part (sign . "pgpmime") (tag-location . 297) (contents . "\ntesting 1\n  \n-- \nA taste of linux = http://www.sh...")))
>   mml2015-sign((part (sign . "pgpmime") (tag-location . 297) (contents . "\ntesting 1\n  \n-- \nA taste of linux = http://www.sh...")))
>   mml-pgpmime-sign-buffer((part (sign . "pgpmime") (tag-location . 297) (contents . "\ntesting 1\n  \n-- \nA taste of linux = http://www.sh...")))
>   mml-generate-mime-1((part (sign . "pgpmime") (tag-location . 297) (contents . "\ntesting 1\n  \n-- \nA taste of linux = http://www.sh...")))
>   mml-generate-mime(nil nil)
>   message-encode-message-body()
>   message-send-mail(nil)
>   message-send-via-mail(nil)
>   message-send(nil)
>   message-send-and-exit(nil)
>   funcall-interactively(message-send-and-exit nil)
>   call-interactively(message-send-and-exit)
>   orgtbl-ctrl-c-ctrl-c(nil)
>   funcall-interactively(orgtbl-ctrl-c-ctrl-c nil)
>   call-interactively(orgtbl-ctrl-c-ctrl-c nil nil)
>   command-execute(orgtbl-ctrl-c-ctrl-c)
>   --8<---------------cut here---------------end--------------->8---
>     
> And when looking through the pdf's I built after installing 27.0.90 I can't find how to set 'mml-secure-smime-sign-with-sender''
>
> How can I return to the behaviour of 26.3, but still use 27.0.90, as
> the only way that I can now send emails is by disabling the 2 lines I
> showed earlier.

You can set `mml-secure-smime-sign-with-sender' (or any other option)
using the command `customize-variable' or simply putting

  (setq mml-secure-smime-sign-with-sender t)

into your init file.

Alternatively, you could set `mm-sign-option' to `guided', then you
should get a menu to select a key, instead of the error (which is
arguably a strange default behaviour).

-- 
Štěpán