From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs 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 Message-ID: References: <87r4bx0xsk.fsf@flea.lifelogs.com> <87fvscwswx.fsf-ueno-ueno@gnu.org> <87hacsutvp.fsf-ueno@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1381252700 24383 80.91.229.3 (8 Oct 2013 17:18:20 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 8 Oct 2013 17:18:20 +0000 (UTC) Cc: tzz@lifelogs.com, 15552@debbugs.gnu.org To: Daiki Ueno Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Oct 08 19:18:23 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VTavO-0006IG-OT for geb-bug-gnu-emacs@m.gmane.org; Tue, 08 Oct 2013 19:18:22 +0200 Original-Received: from localhost ([::1]:38032 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTavO-0005Hi-A9 for geb-bug-gnu-emacs@m.gmane.org; Tue, 08 Oct 2013 13:18:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54590) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTavD-0005HB-QA for bug-gnu-emacs@gnu.org; Tue, 08 Oct 2013 13:18:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VTav4-0007dx-KU for bug-gnu-emacs@gnu.org; Tue, 08 Oct 2013 13:18:11 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55275) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTav4-0007ds-H7 for bug-gnu-emacs@gnu.org; Tue, 08 Oct 2013 13:18:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1VTav4-0002OW-9J for bug-gnu-emacs@gnu.org; Tue, 08 Oct 2013 13:18:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 08 Oct 2013 17:18:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15552 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: notabug Original-Received: via spool by 15552-submit@debbugs.gnu.org id=B15552.13812526639178 (code B ref 15552); Tue, 08 Oct 2013 17:18:02 +0000 Original-Received: (at 15552) by debbugs.gnu.org; 8 Oct 2013 17:17:43 +0000 Original-Received: from localhost ([127.0.0.1]:35335 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VTauk-0002Nx-UB for submit@debbugs.gnu.org; Tue, 08 Oct 2013 13:17:43 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:56702) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VTauj-0002Nq-85 for 15552@debbugs.gnu.org; Tue, 08 Oct 2013 13:17:41 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av8EABK/CFHO+K8t/2dsb2JhbABEuzWDWRdzgh8BBVYjEAswBAcLFBgNJIgksR+QDo1jgycDpHqBXoMT X-IPAS-Result: Av8EABK/CFHO+K8t/2dsb2JhbABEuzWDWRdzgh8BBVYjEAswBAcLFBgNJIgksR+QDo1jgycDpHqBXoMT X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="35036390" Original-Received: from 206-248-175-45.dsl.teksavvy.com (HELO pastel.home) ([206.248.175.45]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 08 Oct 2013 13:13:59 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 75DDA6028B; Tue, 8 Oct 2013 13:17:40 -0400 (EDT) In-Reply-To: <87hacsutvp.fsf-ueno@gnu.org> (Daiki Ueno's message of "Tue, 08 Oct 2013 16:03:22 +0900") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:79043 Archived-At: >>>> 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"