From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Daiki Ueno <ueno@gnu.org>
Cc: tzz@lifelogs.com, 15552@debbugs.gnu.org
Subject: bug#15552: 24.3.50; epa-file-cache-passphrase-for-symmetric-encryption not respected with GnuPG 2.x
Date: Tue, 08 Oct 2013 13:17:40 -0400 [thread overview]
Message-ID: <jwveh7v1ysh.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <87hacsutvp.fsf-ueno@gnu.org> (Daiki Ueno's message of "Tue, 08 Oct 2013 16:03:22 +0900")
>>>> 1. On the local system, install GnuPG 2.x and don't run the gpg-agent
>>>> 2. Set epa-file-cache-passphrase-for-symmetric-encryption to t
>>>> 3. Open file.gpg: password dialog pops up
>>>> 4. close file.gpg
>>>> 5. Open file.gpg: password dialog pops up again
>>>> Step (5) should not prompt. It works properly with GnuPG 1.x.
>>> That's intended behavior.
>> Could you give the rationale for it?
> When gpg-agent is not properly set up as a daemon, gpg2 invokes
> gpg-agent internally for each session. In the above case, there are two
> gpg2 sessions (two "Open") and thus there are two gpg-agent processes,
> which don't share the passphrase.
That explains technically why gpg prompts twice, but it doesn't indicate
that this implementation was designed specifically so that step
5 prompts again. I.e. it's not "intended behavior", but rather
"expected behavior" due to implementation choices.
Still I'm confused: what kind of caching does
epa-file-cache-passphrase-for-symmetric-encryption offer, then?
From the docstring I got the impression that it would cache the
passphrase in Emacs's heap, so gpg's own caching should be largely
irrelevant (in the second session it will prompt for a password, which
Emacs should provide from its own cache without prompting the user).
Stefan "Also confused about what "symmetric" has to do with it"
next prev parent reply other threads:[~2013-10-08 17:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-07 17:56 bug#15552: 24.3.50; epa-file-cache-passphrase-for-symmetric-encryption not respected with GnuPG 2.x Teodor Zlatanov
2013-10-07 23:41 ` Daiki Ueno
2013-10-08 0:46 ` Ted Zlatanov
2013-10-08 3:14 ` Stefan Monnier
2013-10-08 7:03 ` Daiki Ueno
2013-10-08 10:47 ` Ted Zlatanov
2013-10-08 17:17 ` Stefan Monnier [this message]
2013-10-08 21:51 ` Daiki Ueno
2013-10-09 3:01 ` Stefan Monnier
2013-10-09 3:53 ` Daiki Ueno
2013-10-09 9:32 ` Ted Zlatanov
2013-10-09 12:40 ` Stefan Monnier
2013-10-10 3:08 ` Daiki Ueno
2013-10-10 13:25 ` Ted Zlatanov
2013-10-10 14:31 ` Stefan Monnier
2013-10-10 14:32 ` Stefan Monnier
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