https://bugs.kde.org/show_bug.cgi?id=469304
Bug ID: 469304
Summary: KMail does not find the key used to sign a message if
a signing subkey was used
Classification: Applications
Product: kmail2
Version: 5.22.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: crypto
Assignee: kdepim-b...@kde.org
Reporter: kloec...@kde.org
Target Milestone: ---
SUMMARY
KMail claims that messages signed with a subkey of my own key are signed with
an unknown key.
STEPS TO REPRODUCE
1. You need an OpenPGP certficate with a signing subkey.
2. Sign a message with this key and send it to yourself (or use Send Later to
put it in your outbox).
3. View the message.
OBSERVED RESULT
I have an OpenPGP certficate with a signing subkey that is used to sign my
messages. KMail has no problem signing my messages, but when viewing my
messages KMail says:
> Message was signed on 25.04.23 18:24 with unknown key
> 0xDB8E020E328C30942060BF21B16F599516474ABA.
> The validity of the signature cannot be verified.
> Status: Good signature
Obviously, this doesn't make any sense because how can the signature be good if
it was signed with an unknown key. It turns out that gpg which is used to
verify the signature very well knows the key, but KMail is not able to find it.
EXPECTED RESULT
KMail should say something like:
> Message was signed by *@ingo-kloecker.de (Key ID: 0xE375339BF4C51840).
> The signature is valid and the key is ultimately trusted.
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