Issue 1) should be implemented as already described (on error -> dialog to retry with "always trust" flag)

@ebo and me talked about this and T6701: GpgOL: Use GPGME_ENCRYPT_ALWAYS_TRUST. We think, it's best to have a short meeting to discuss further changes.

Patch was merged upstream (KF 6.25): 332678d8a4f635d6938eb3e9ec03d845aa89697a

I applied the keyboxd part for SETEPHEMERAL command, as it doesn't break anything.

With signing only, the retry option is not offered and directly either hangs or shows the "Invalid CRL object" / "Unknown error" error.
Is this intentional?

Here is an attempt to fix the client side:

Pushed: rG8b6de59ad880: agent: Raise GPG_ERR_BAD_SECKEY when p >= q for RSA key.

I have added the fix as patch for VSD 3.3 because the commits that introduced this regression were also added as patches for VSD 3.3.

This is a regression that was introduced with T7759: Kleopatra: Notepad encryption with S/MIME fails.

Fixed. For VSD 3.4 this will also be fixed if gpgme is updated.

This is a bug in gpgme. gpgsm_assuan_simple_command only reads a single line before waiting for more data although there is a second line (ERR ...) ready to be read. gpgsm never sends more data because it has already sent its full answer. So gpgme waits forever.

Note that KWatchGnuPG isn't available on Windows.

Fixed. KWatchGnuPG doesn't modify GnuPG config files anymore. Instead one has to set socket:// as log file for the components one wants to see in KWatchGnuPG.

Ticket for the hang on file encryption: T8187: Kleopatra: File encryption with invalid S/MIME certificate hangs indefinitely

According to Werner, that should be: