From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ted Zlatanov Newsgroups: gmane.emacs.devel Subject: Re: NaCl support for Emacs Date: Mon, 09 Jan 2012 20:43:12 -0500 Organization: =?utf-8?B?0KLQtdC+0LTQvtGAINCX0LvQsNGC0LDQvdC+0LI=?= @ Cienfuegos Message-ID: <87pqesgwnj.fsf@lifelogs.com> References: <87boqi6tzz.fsf@linux-hvfx.site> <87ehve3ul8.fsf@lifelogs.com> <87lipl22xm.fsf@lifelogs.com> <87boqh20ha.fsf@lifelogs.com> <871urc46c9.fsf@uwakimon.sk.tsukuba.ac.jp> <739bsoysp.fsf@news.eternal-september.org> <87ty47r5yt.fsf@lifelogs.com> <87k452p5u3.fsf@lifelogs.com> <87liphne9e.fsf_-_@lifelogs.com> <87fwfon7gl.fsf@lifelogs.com> <87hb04icxl.fsf@lifelogs.com> Reply-To: emacs-devel@gnu.org NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1326159821 26603 80.91.229.12 (10 Jan 2012 01:43:41 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 10 Jan 2012 01:43:41 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jan 10 02:43:37 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RkQkT-000762-Jy for ged-emacs-devel@m.gmane.org; Tue, 10 Jan 2012 02:43:37 +0100 Original-Received: from localhost ([::1]:47466 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RkQkO-0006od-2N for ged-emacs-devel@m.gmane.org; Mon, 09 Jan 2012 20:43:32 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:60360) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RkQkL-0006mf-9F for emacs-devel@gnu.org; Mon, 09 Jan 2012 20:43:30 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RkQkJ-0005Mb-Un for emacs-devel@gnu.org; Mon, 09 Jan 2012 20:43:29 -0500 Original-Received: from lo.gmane.org ([80.91.229.12]:42104) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RkQkJ-0005MM-Jv for emacs-devel@gnu.org; Mon, 09 Jan 2012 20:43:27 -0500 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1RkQkI-00070z-Ff for emacs-devel@gnu.org; Tue, 10 Jan 2012 02:43:26 +0100 Original-Received: from c-76-28-40-19.hsd1.vt.comcast.net ([76.28.40.19]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 10 Jan 2012 02:43:26 +0100 Original-Received: from tzz by c-76-28-40-19.hsd1.vt.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 10 Jan 2012 02:43:26 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: emacs-devel@gnu.org Original-Lines: 42 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: c-76-28-40-19.hsd1.vt.comcast.net X-Face: bd.DQ~'29fIs`T_%O%C\g%6jW)yi[zuz6; d4V0`@y-~$#3P_Ng{@m+e4o<4P'#(_GJQ%TT= D}[Ep*b!\e,fBZ'j_+#"Ps?s2!4H2-Y"sx" Mail-Copies-To: never User-Agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.90 (gnu/linux) Cancel-Lock: sha1:IoqfScI+sT8MWGV2c+8soRn+hyE= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 80.91.229.12 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:147539 Archived-At: On Mon, 09 Jan 2012 20:30:48 -0500 Stefan Monnier wrote: >>>> Many places in the Emacs core (C and ELisp) could use a fast easy >>>> encryption library for arbitrary data that supports public and >>>> secret-key encryption, in addition to EPA/EPG that >>>> I already mentioned. SM> Could be. There's no hard evidence for it yet. >> I listed three places I think could use it, how much harder does the >> evidence have to be? >> - auth-source's cache of file contents >> - EPA/EPG or something like it that does not rely on the external GPG utility >> - general ELisp storage of secret data SM> I don't think Emacs should reinvent every wheel. GPG does this job well SM> and using it means that those files can be decrypted without Emacs. Calling out to an external process is less secure than using built-in encryption primitives. So while in general you're right, in this case I'll respectfully disagree. It may be convenient but it's not secure. SM> I'm sure there are cases where doing the encryption in Emacs can make SM> sense, but I'd first like to see actual code (aka "hard evidence"). Argh. The auth-source cache is already implemented as a hack, is that hard enough evidence? Quoting the relevant bit from `auth-source-netrc-parse': #+begin_src lisp ;; cache all netrc files (used to be just .gpg files) ;; Store the contents of the file heavily encrypted in memory. ;; (note for the irony-impaired: they are just obfuscated) (aput 'auth-source-netrc-cache file (list :mtime (nth 5 (file-attributes file)) :secret (lexical-let ((v (mapcar '1+ (buffer-string)))) (lambda () (apply 'string (mapcar '1- v)))))) #+end_src Similarly auth-source.el returns passwords in a `lexical-let' wrapper so they can't be leaked into the logs, they have to be evaluated, but it doesn't attempt to obfuscate them like the code above. Ted