Add --expert.

Perhaps --full-generate-key should provide more algorithm choices, then, e.g. ed25519?

Sorry, this as been discussed ad nausea. We try our best to help people not to use useless and harmful (e.g. performance of the WoT) algorithm choices.

Yes I do understand Windows XP is not supported. Just in case it is a minor problem that is easy to fix and will not cost your much effort. I'd like to add more information: I do not change
%LOCALAPPDATA%. There is no such environment variable. A similar environment variable is:
APPDATA=C:\Documents and Settings\myname\Application Data
I do set GNUPGHOME=E:\key, which I think should be allowed because I do not want my personal info be stored in system drive.

We should close this. The recent fix in 2.2 and the forthcoming 2.3 does everything we want. In the meantiime or if further problems turn up, --ignore-cert is a good workaround.

This is a support question and not a bug. You should ask such questions on the channels for Gpg4win, which does the Community support for GnuPG on Windows: https://www.gpg4win.org/community.html

No, it does not matter.

I just fixed a bug related to the DP. That might be related. See rG0c8299e2b56ef2e1

That particular bug seems to have been solved a long time ago. I stumbled upon up while fixing a DP bug today.

To clarify that I meant that the underlying problem is our current keylisting speed in Kleopatra I have opened T6206.

In T6195#163175, @werner wrote:

keyboxd has nothing to do with this, it merely makes the lookup of keys a bit faster. The computation of the WoT itself takes long and there is no shortcut for it. Fortunately most users don't have a deeply meshed WoT with dedicated revokers etc., thus for them things are fast in the standard configuration.

keyboxd has nothing to do with this, it merely makes the lookup of keys a bit faster. The computation of the WoT itself takes long and there is no shortcut for it. Fortunately most users don't have a deeply meshed WoT with dedicated revokers etc., thus for them things are fast in the standard configuration.

I agree. We have to get rid of auto check trustdb and such stuff. I always found that impossible to program around because it either takes a long time (check-trustdb) or it might return invalid results (no check).
The solution for this is keyboxd.

If you run gpg --export-ownertrust you will notice that the trust has been set to ultimate (value is 6). However, due to the no-auto-check-trustdb in your gpg.conf that will valeu will only be shown after running gpg --check-trustdb. The value shown in the key listing is the computed value and the computation is done by --check-trustdb. I don't see a bug here.

Pushed changes.

The export/backup of the secret part of S/MIME certificates has been fixed with T6189: Secret key backup of S/MIME certificate creates bad result. An exported certificate should now be imported without problems.

Now "BER error" is reported, if the user tries to import a .p8 certificate. (The certificate exported by Kleopatra wasn't stored as PKCS#12, but presumably as PKCS#8 which gpgsm cannot import. See T6189: Secret key backup of S/MIME certificate creates bad result.)

--import [files]
       Import  the certificates from the PEM or binary encoded files as well as from signed-only messages.
       This command may also be used to import a secret key from a PKCS#12 file.

BTW, gnupg/doc/DETAILS tells that the fingerprint is optional:

Pushed the fix for GPG_ERR_INV_ENGINE.

gpgsm may emit S IMPORT_PROBLEM 1 (with no fingerprint information) when it cannot find valid fingerprint.
I think that this case should be handled correctly by GPGME, not returning GPG_ERR_INV_ENGINE.

Ok. That is about the Invalid Crypto Engine. But this does not explain why a .p12 export via Kleopatra leads to this error when we export a valid certificate. The same thing I do with Kleopatra on the Command Line works:

The error is generated in parse_import in gpgme/src/import.c:

if (errno || args == tail || *tail != ' ')
  {
    /* The crypto backend does not behave.  */
    free (import);
    return trace_gpg_error (GPG_ERR_INV_ENGINE);
  }

The more relavant error is that there is no status output on failure which is what gpgme uses (due to double forking).

gpgv returns success iff the signature is valid. That is the whole purpose of this tool.

I have introduced this hint exactly because it's impossible to describe the rules automatically.

These hints are taken from the help.txt file.

gpg-agent passes to pinentry a short and a long hint for the passphrase constraints (see constraints-hint-* in pinentry.texi). If these hints are set, then pinentry shows them even before the user has started to enter a passphrase. The error message can then simply be "Read the hint, stupid!". Just kidding, of course.

Can you please give a more detailed example with regedit files to demonstrate that?

Can't we get them from the help.txt file? Putting a tooltip into the pattern file would be an option but needs substantial changes,