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:

Maybe those smime certs will do:

It needs to be clarified which kind of errors should be handled and which kind of S/MIME certificates should be allowed to be used for encryption:

• Valid certificates where the CRL check (or OCSP check?) fails
• Invalid certificates (e.g. because of incomplete chain/missing CA)
• Expired certificates

Pushed the change: rG533bcc265e9c: common:dotlock: Clean up for error/info/warning message.

While I pushed the change of libgcrypt, I'd like to apply following change to GnuPG.
This is more kind than GPG_ERR_BAD_PASSPHRASE by gcry_pk_testkey failure.