[MlMt] Handling expired PGP keys

[Benny Kjær Nielsen]

On 2 Feb 2017, at 21:50, Steven M. Bellovin wrote:

> I composed a reply message to someone and requested PGP encryption and 
> signature.  However, my copy of the recipient's key was expired.  I 
> obtained a new version, but MailMate still insisted it was expired 
> when I tried resending the draft.  I deleted the old key from my key 
> ring, and tried stopping and restarting MailMate, but to no avail.  I 
> finally copied all of the text from my reply message, deleted it, and 
> created a new reply, pasting in the old text.  This seems to suggest 
> that MailMate is caching the key on first attempt and not refreshing 
> it, which doesn't seem right.  (I'm running 2.0 BETA 6074.)

MailMate doesn't cache anything related to PGP keys. Every time an 
OpenPGP action is needed then MailMate uses the external `gpg2` command. 
There is a daemon running (used by `gpg2`) name `gpg-agent`, but I don't 
know enough about the internal behavior of `gpg2` to know if this 
explains the issue. It's possible to kill the daemon (and then it's 
restarted when needed):

	killall gpg-agent

You can try that if you see this issue again.

You can also get debug output from MailMate like this:

	defaults write com.freron.MailMate MmDebugSecurity -bool YES
	/Applications/MailMate.app/Contents/MacOS/MailMate

Then you should be able to see how MailMate uses `gpg2`.

I hope this helps.

-- 
Benny
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