[MlMt] Handling expired PGP keys

[Steven M. Bellovin]

Thanks -- will remember that for next time.

On 10 Feb 2017, at 5:52, Benny Kjær Nielsen wrote:

> 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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         --Steve Bellovin, https://www.cs.columbia.edu/~smb

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