* bug#18513: 24.3; message-mode sends unencrypted on error
@ 2014-09-20 6:12 David Bremner
2014-09-29 11:09 ` Daiki Ueno
0 siblings, 1 reply; 11+ messages in thread
From: David Bremner @ 2014-09-20 6:12 UTC (permalink / raw)
To: 18513
1) Start emacs with emacs -Q
2) start sending a message with M-x message-mail
3) add "sign" tag with C-c C-m C-s
3) manually replace "sign with "sigencrypt", simulating failed attempt to
manually change mode
4) add some text to the message, set a destination address and
subject
5) send using C-c C-c
The message is sent unencrypted, without any feedback to the user. It
seems that the correct response would be to refuse to send a message
with malformed mml tags.
In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
of 2014-06-06 on barber, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11600000
System Description: Debian GNU/Linux testing (jessie)
Configured using:
`configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'
'--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
'--localstatedir=/var/lib' '--infodir=/usr/share/info'
'--mandir=/usr/share/man' '--with-pop=yes'
'--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
'--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
'--with-x-toolkit=lucid' '--with-toolkit-scroll-bars' '--without-gconf'
'--without-gsettings' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2
-fstack-protector --param=ssp-buffer-size=4 -Wformat
-Werror=format-security -Wall' 'LDFLAGS=-Wl,-z,relro'
'CPPFLAGS=-D_FORTIFY_SOURCE=2''
Important settings:
value of $LANG: en_CA.UTF-8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Circe Channel
Minor modes in effect:
tracking-mode: t
diff-auto-refine-mode: t
shell-dirtrack-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
d @ t h <backspace> e t h e r a <tab> <return> C-n
t e s t i n g SPC e n c r y p t i o n SPC f a i l 2
C-n C-n C-n C-c RET C-e C-p C-r C-e M-b M-d n s a C-n
<return> E d w a r d S-SPC S n o w d e n . SPC S e
k r i t SPC s t u f f . C-c C-c q = <up> <return> C-c
C-SPC y e a h , SPC I ' ; d <backspace> <backspace>
d SPC n e e d SPC t o SPC u s e SPC a SPC w e b SPC
b r o w s e r SPC f o r SPC t h a t . SPC <return>
s <backspace> s t i l l SPC n o t SPC s t a l l m a
n SPC <backspace> e s q u e SPC e n o u g h <return>
b t w , SPC c <backspace> h o w SPC c a n SPC I SPC
f i n d SPC a l l SPC b u g s SPC i n SPC m e s s a
g e - m o d e SPC o n SPC b u g s . g n u . o r g SPC
? <return> e r r . SPC d e b b u g s . g n u . o r
g <return> / m e SPC l o o k s SPC f o r SPC h i s
SPC b u g g y w h i p <return> <help-echo> M-x r e
p o r <tab> <return>
Recent messages:
Sending via mail...
Sending...done
Invalid face reference: message-header-from [33 times]
Making completion list...
View mode: type C-h for help, h for commands, q to quit.
Mark set [3 times]
Sending...
Mark set [2 times]
Sending via mail...
Sending...done
Load-path shadows:
/home/bremner/.emacs.d/el-get/js2-mode/.dir-locals hides /home/bremner/.emacs.d/el-get/el-get/.dir-locals
/home/bremner/.emacs.d/el-get/message-templ/message-templ hides /home/bremner/share/emacs/site-lisp/message-templ/message-templ
/home/bremner/.emacs.d/el-get/circe/lisp/circe hides /home/bremner/share/emacs/site-lisp/circe/circe
/home/bremner/.emacs.d/el-get/circe/lisp/lui hides /home/bremner/share/emacs/site-lisp/circe/lui
/home/bremner/.emacs.d/el-get/circe/lisp/tracking hides /home/bremner/share/emacs/site-lisp/circe/tracking
/home/bremner/.emacs.d/el-get/circe/lisp/circe-highlight-all-nicks hides /home/bremner/share/emacs/site-lisp/circe/circe-highlight-all-nicks
/home/bremner/.emacs.d/el-get/circe/lisp/circe-color-nicks hides /home/bremner/share/emacs/site-lisp/circe/circe-color-nicks
/home/bremner/.emacs.d/el-get/circe/lisp/lui-autopaste hides /home/bremner/share/emacs/site-lisp/circe/lui-autopaste
/home/bremner/.emacs.d/el-get/circe/lisp/lui-format hides /home/bremner/share/emacs/site-lisp/circe/lui-format
/home/bremner/.emacs.d/el-get/circe/lisp/circe-chanop hides /home/bremner/share/emacs/site-lisp/circe/circe-chanop
/home/bremner/.emacs.d/el-get/circe/lisp/lcs hides /home/bremner/share/emacs/site-lisp/circe/lcs
/home/bremner/.emacs.d/el-get/circe/lisp/lui-irc-colors hides /home/bremner/share/emacs/site-lisp/circe/lui-irc-colors
/home/bremner/.emacs.d/el-get/circe/lisp/circe-lagmon hides /home/bremner/share/emacs/site-lisp/circe/circe-lagmon
/home/bremner/.emacs.d/el-get/circe/lisp/lui-logging hides /home/bremner/share/emacs/site-lisp/circe/lui-logging
/home/bremner/.emacs.d/el-get/js2-mode/js2-imenu-extras hides /usr/share/emacs24/site-lisp/js2-mode/js2-imenu-extras
/home/bremner/.emacs.d/el-get/js2-mode/js2-mode hides /usr/share/emacs24/site-lisp/js2-mode/js2-mode
/usr/share/org-mode/lisp/htmlize hides /usr/share/emacs24/site-lisp/emacs-goodies-el/htmlize
/home/bremner/.emacs.d/el-get/markdown-mode/markdown-mode hides /usr/share/emacs24/site-lisp/emacs-goodies-el/markdown-mode
/usr/share/emacs/24.3/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs/site-lisp/autoconf/autotest-mode hides /usr/share/emacs/site-lisp/autotest-mode
/usr/share/emacs24/site-lisp/flim/hex-util hides /usr/share/emacs/24.3/lisp/hex-util
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/usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/24.3/lisp/textmodes/flyspell
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.3/lisp/textmodes/rst
/usr/share/emacs24/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/24.3/lisp/textmodes/ispell
/usr/share/emacs24/site-lisp/org-mode/org-entities hides /usr/share/emacs/24.3/lisp/org/org-entities
/usr/share/emacs24/site-lisp/org-mode/ob-perl hides /usr/share/emacs/24.3/lisp/org/ob-perl
/usr/share/emacs24/site-lisp/org-mode/org-clock hides /usr/share/emacs/24.3/lisp/org/org-clock
/usr/share/emacs24/site-lisp/org-mode/ob-mscgen hides /usr/share/emacs/24.3/lisp/org/ob-mscgen
/usr/share/emacs24/site-lisp/org-mode/org-protocol hides /usr/share/emacs/24.3/lisp/org/org-protocol
/usr/share/emacs24/site-lisp/org-mode/org-table hides /usr/share/emacs/24.3/lisp/org/org-table
/usr/share/emacs24/site-lisp/org-mode/ob-lob hides /usr/share/emacs/24.3/lisp/org/ob-lob
/usr/share/emacs24/site-lisp/org-mode/org-plot hides /usr/share/emacs/24.3/lisp/org/org-plot
/usr/share/emacs24/site-lisp/org-mode/ob-shen hides /usr/share/emacs/24.3/lisp/org/ob-shen
/usr/share/emacs24/site-lisp/org-mode/ob-sql hides /usr/share/emacs/24.3/lisp/org/ob-sql
/usr/share/emacs24/site-lisp/org-mode/org-mhe hides /usr/share/emacs/24.3/lisp/org/org-mhe
/usr/share/emacs24/site-lisp/org-mode/ob-fortran hides /usr/share/emacs/24.3/lisp/org/ob-fortran
/usr/share/emacs24/site-lisp/org-mode/ob-octave hides /usr/share/emacs/24.3/lisp/org/ob-octave
/usr/share/emacs24/site-lisp/org-mode/org-element hides /usr/share/emacs/24.3/lisp/org/org-element
/usr/share/emacs24/site-lisp/org-mode/org-src hides /usr/share/emacs/24.3/lisp/org/org-src
/usr/share/emacs24/site-lisp/org-mode/org-habit hides /usr/share/emacs/24.3/lisp/org/org-habit
/usr/share/emacs24/site-lisp/org-mode/ob-R hides /usr/share/emacs/24.3/lisp/org/ob-R
/usr/share/emacs24/site-lisp/org-mode/ob-awk hides /usr/share/emacs/24.3/lisp/org/ob-awk
/usr/share/emacs24/site-lisp/org-mode/org-datetree hides /usr/share/emacs/24.3/lisp/org/org-datetree
/usr/share/emacs24/site-lisp/org-mode/org-bibtex hides /usr/share/emacs/24.3/lisp/org/org-bibtex
/usr/share/emacs24/site-lisp/org-mode/ob-ref hides /usr/share/emacs/24.3/lisp/org/ob-ref
/usr/share/emacs24/site-lisp/org-mode/ob-io hides /usr/share/emacs/24.3/lisp/org/ob-io
/usr/share/emacs24/site-lisp/org-mode/org-info hides /usr/share/emacs/24.3/lisp/org/org-info
/usr/share/org-mode/lisp/org-wl hides /usr/share/emacs/24.3/lisp/org/org-wl
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/usr/share/emacs24/site-lisp/org-mode/org-pcomplete hides /usr/share/emacs/24.3/lisp/org/org-pcomplete
/usr/share/emacs24/site-lisp/org-mode/ob-tangle hides /usr/share/emacs/24.3/lisp/org/ob-tangle
/usr/share/emacs24/site-lisp/org-mode/ob-table hides /usr/share/emacs/24.3/lisp/org/ob-table
/usr/share/emacs24/site-lisp/org-mode/ob-lilypond hides /usr/share/emacs/24.3/lisp/org/ob-lilypond
/usr/share/emacs24/site-lisp/org-mode/org-colview hides /usr/share/emacs/24.3/lisp/org/org-colview
/usr/share/emacs24/site-lisp/org-mode/ob-org hides /usr/share/emacs/24.3/lisp/org/ob-org
/usr/share/emacs24/site-lisp/org-mode/ob-latex hides /usr/share/emacs/24.3/lisp/org/ob-latex
/usr/share/emacs24/site-lisp/org-mode/org-loaddefs hides /usr/share/emacs/24.3/lisp/org/org-loaddefs
/usr/share/emacs24/site-lisp/org-mode/ob-ruby hides /usr/share/emacs/24.3/lisp/org/ob-ruby
/usr/share/emacs24/site-lisp/org-mode/ob-matlab hides /usr/share/emacs/24.3/lisp/org/ob-matlab
/usr/share/emacs24/site-lisp/org-mode/org-mobile hides /usr/share/emacs/24.3/lisp/org/org-mobile
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/usr/share/emacs24/site-lisp/org-mode/org-mouse hides /usr/share/emacs/24.3/lisp/org/org-mouse
/usr/share/emacs24/site-lisp/org-mode/org-docview hides /usr/share/emacs/24.3/lisp/org/org-docview
/usr/share/emacs24/site-lisp/org-mode/org-list hides /usr/share/emacs/24.3/lisp/org/org-list
/usr/share/emacs24/site-lisp/org-mode/ob-scheme hides /usr/share/emacs/24.3/lisp/org/ob-scheme
/usr/share/emacs24/site-lisp/org-mode/org-faces hides /usr/share/emacs/24.3/lisp/org/org-faces
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/usr/share/emacs24/site-lisp/org-mode/org-archive hides /usr/share/emacs/24.3/lisp/org/org-archive
/usr/share/emacs24/site-lisp/org-mode/ob-python hides /usr/share/emacs/24.3/lisp/org/ob-python
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/usr/share/emacs24/site-lisp/org-mode/org-timer hides /usr/share/emacs/24.3/lisp/org/org-timer
/usr/share/emacs24/site-lisp/org-mode/ob-sh hides /usr/share/emacs/24.3/lisp/org/ob-sh
/usr/share/emacs24/site-lisp/org-mode/ob-gnuplot hides /usr/share/emacs/24.3/lisp/org/ob-gnuplot
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/usr/share/emacs24/site-lisp/org-mode/org-attach hides /usr/share/emacs/24.3/lisp/org/org-attach
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/home/bremner/.emacs.d/el-get/js2-mode/.dir-locals hides /usr/share/emacs/24.3/lisp/gnus/.dir-locals
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/usr/share/emacs24/site-lisp/auctex/tex-font hides /usr/share/emacs/site-lisp/auctex/tex-font
/usr/share/emacs24/site-lisp/auctex/context-en hides /usr/share/emacs/site-lisp/auctex/context-en
/usr/share/emacs24/site-lisp/auctex/tex-info hides /usr/share/emacs/site-lisp/auctex/tex-info
/usr/share/emacs/24.3/lisp/emacs-lisp/cl-lib hides /usr/share/emacs/24.3/site-lisp/slime/lib/cl-lib
/usr/share/emacs/24.3/lisp/emacs-lisp/ert hides /usr/share/emacs/24.3/site-lisp/slime/lib/ert
/usr/share/emacs/24.3/lisp/emacs-lisp/ert-x hides /usr/share/emacs/24.3/site-lisp/slime/lib/ert-x
Features:
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mml2015 epg-config gnus-sum nnoo gnus-group gnus-undo nnmail mail-source
gnus-start gnus-spec gnus-int gnus-range gnus-win gnus gnus-ems nnheader
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el-get-git-svn el-get-fink el-get-emacswiki el-get-http
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geiser ido ess-toolbar ess-mouse mouseme thingatpt browse-url ess-menu
ess-swv ess-noweb ess-noweb-font-lock-mode ess-bugs-l essd-els ess-sas-d
ess-sas-l ess-sas-a shell pcomplete ess-sta-d ess-sta-l cc-vars cc-defs
make-regexp ess-sp6-d ess-sp3-d ess-julia ess-r-d compile ess-tracebug
format-spec ess-roxy advice cl cl-lib advice-preload hideshow ess-help
ess-developer ess-r-args eldoc help-fns ess-s-l ess ess-inf comint
ansi-color ring ess-mode ess-noweb-mode ess-utils time-date ess-custom
executable easymenu ess-compat ess-site emacs-goodies-el
emacs-goodies-custom emacs-goodies-loaddefs easy-mmode dpkg-dev-el
dpkg-dev-el-loaddefs preview-latex tex-site auto-loads tooltip
ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list newcomment lisp-mode
register page menu-bar rfn-eshadow timer select scroll-bar mouse
jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer loaddefs button faces cus-face macroexp files text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting font-render-setting x-toolkit x multi-tty emacs)
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-09-20 6:12 bug#18513: 24.3; message-mode sends unencrypted on error David Bremner
@ 2014-09-29 11:09 ` Daiki Ueno
2014-09-29 12:14 ` David Bremner
2014-10-01 1:28 ` Glenn Morris
0 siblings, 2 replies; 11+ messages in thread
From: Daiki Ueno @ 2014-09-29 11:09 UTC (permalink / raw)
To: David Bremner; +Cc: 18513
[-- Attachment #1: Type: text/plain, Size: 619 bytes --]
David Bremner <david@tethera.net> writes:
> 1) Start emacs with emacs -Q
> 2) start sending a message with M-x message-mail
> 3) add "sign" tag with C-c C-m C-s
> 3) manually replace "sign with "sigencrypt", simulating failed attempt to
> manually change mode
> 4) add some text to the message, set a destination address and
> subject
> 5) send using C-c C-c
>
> The message is sent unencrypted, without any feedback to the user. It
> seems that the correct response would be to refuse to send a message
> with malformed mml tags.
I've installed the following simple fix in the trunk. Does it work for you?
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: mml.el.diff --]
[-- Type: text/x-diff, Size: 910 bytes --]
=== modified file 'lisp/gnus/ChangeLog'
--- lisp/gnus/ChangeLog 2014-09-11 19:44:25 +0000
+++ lisp/gnus/ChangeLog 2014-09-29 11:02:32 +0000
@@ -1,3 +1,8 @@
+2014-09-29 Daiki Ueno <ueno@gnu.org>
+
+ * mml.el (mml-parse-1): Error out if unknown mode is specified in
+ <#secure> tag (bug#18513).
+
2014-09-11 Paul Eggert <eggert@cs.ucla.edu>
* gnus-cloud.el (gnus-cloud-parse-version-1): Fix misspelling
=== modified file 'lisp/gnus/mml.el'
--- lisp/gnus/mml.el 2014-03-24 01:56:03 +0000
+++ lisp/gnus/mml.el 2014-09-29 11:00:11 +0000
@@ -257,7 +257,9 @@
((string= mode "encrypt")
(setq tags (list "encrypt" method)))
((string= mode "signencrypt")
- (setq tags (list "sign" method "encrypt" method))))
+ (setq tags (list "sign" method "encrypt" method)))
+ (t
+ (error "Unknown secure mode %s" mode)))
(eval `(mml-insert-tag ,secure-mode
,@tags
,(if keyfile "keyfile")
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-09-29 11:09 ` Daiki Ueno
@ 2014-09-29 12:14 ` David Bremner
2014-09-30 1:36 ` Daiki Ueno
2019-09-23 11:46 ` Lars Ingebrigtsen
2014-10-01 1:28 ` Glenn Morris
1 sibling, 2 replies; 11+ messages in thread
From: David Bremner @ 2014-09-29 12:14 UTC (permalink / raw)
To: Daiki Ueno; +Cc: 18513
Daiki Ueno <ueno@gnu.org> writes:
> I've installed the following simple fix in the trunk. Does it work for you?
> === modified file 'lisp/gnus/mml.el'
> --- lisp/gnus/mml.el 2014-03-24 01:56:03 +0000
> +++ lisp/gnus/mml.el 2014-09-29 11:00:11 +0000
> @@ -257,7 +257,9 @@
> ((string= mode "encrypt")
> (setq tags (list "encrypt" method)))
> ((string= mode "signencrypt")
> - (setq tags (list "sign" method "encrypt" method))))
> + (setq tags (list "sign" method "encrypt" method)))
> + (t
> + (error "Unknown secure mode %s" mode)))
> (eval `(mml-insert-tag ,secure-mode
> ,@tags
> ,(if keyfile "keyfile")
It's definitely an improvement, and it fixes the scenario I reported. On
the other hand, if the use corrupts the #secure tag then essentially the
same behaviour results. Would it be possible to have a strict mode where
any unknown mml tag causes an error?
David
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-09-29 12:14 ` David Bremner
@ 2014-09-30 1:36 ` Daiki Ueno
2019-09-23 11:46 ` Lars Ingebrigtsen
1 sibling, 0 replies; 11+ messages in thread
From: Daiki Ueno @ 2014-09-30 1:36 UTC (permalink / raw)
To: David Bremner; +Cc: 18513
David Bremner <david@tethera.net> writes:
> It's definitely an improvement, and it fixes the scenario I reported. On
> the other hand, if the use corrupts the #secure tag then essentially the
> same behaviour results. Would it be possible to have a strict mode where
> any unknown mml tag causes an error?
Could be, but I guess it should be a separate issue (and a wishlist
rather than important). For the meantime, I think a reasonable solution
would be to add (more?) checks for the #secure tag only.
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-09-29 11:09 ` Daiki Ueno
2014-09-29 12:14 ` David Bremner
@ 2014-10-01 1:28 ` Glenn Morris
2014-10-01 2:32 ` Daiki Ueno
1 sibling, 1 reply; 11+ messages in thread
From: Glenn Morris @ 2014-10-01 1:28 UTC (permalink / raw)
To: Daiki Ueno; +Cc: David Bremner, 18513
Daiki Ueno wrote:
> I've installed the following simple fix in the trunk. Does it work for you?
[...]
> - (setq tags (list "sign" method "encrypt" method))))
> + (setq tags (list "sign" method "encrypt" method)))
> + (t
> + (error "Unknown secure mode %s" mode)))
Seems like a safe, simple fix for a potentially important issue;
so what do you think about putting it in emacs-24?
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-10-01 1:28 ` Glenn Morris
@ 2014-10-01 2:32 ` Daiki Ueno
0 siblings, 0 replies; 11+ messages in thread
From: Daiki Ueno @ 2014-10-01 2:32 UTC (permalink / raw)
To: Glenn Morris; +Cc: David Bremner, 18513
Glenn Morris <rgm@gnu.org> writes:
> Daiki Ueno wrote:
>
>> I've installed the following simple fix in the trunk. Does it work for you?
> [...]
>> - (setq tags (list "sign" method "encrypt" method))))
>> + (setq tags (list "sign" method "encrypt" method)))
>> + (t
>> + (error "Unknown secure mode %s" mode)))
>
> Seems like a safe, simple fix for a potentially important issue;
> so what do you think about putting it in emacs-24?
Pushed now (hope it met the deadline).
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2014-09-29 12:14 ` David Bremner
2014-09-30 1:36 ` Daiki Ueno
@ 2019-09-23 11:46 ` Lars Ingebrigtsen
2019-09-23 12:18 ` David Bremner
1 sibling, 1 reply; 11+ messages in thread
From: Lars Ingebrigtsen @ 2019-09-23 11:46 UTC (permalink / raw)
To: David Bremner; +Cc: 18513, Daiki Ueno
David Bremner <david@tethera.net> writes:
> It's definitely an improvement, and it fixes the scenario I reported. On
> the other hand, if the use corrupts the #secure tag then essentially the
> same behaviour results. Would it be possible to have a strict mode where
> any unknown mml tag causes an error?
I don't think it's possible to do that in general -- for instance, if
the user removes the first three characters from the MML tag (leaving a
line with just "ecure ..."), then Message can't know that it's supposed
to be secure...
So I don't see any way to do this in general, and I'm closing this bug
report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2019-09-23 11:46 ` Lars Ingebrigtsen
@ 2019-09-23 12:18 ` David Bremner
2019-09-23 13:53 ` Lars Ingebrigtsen
0 siblings, 1 reply; 11+ messages in thread
From: David Bremner @ 2019-09-23 12:18 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: 18513, Daniel Kahn Gillmor, Daiki Ueno
Lars Ingebrigtsen <larsi@gnus.org> writes:
> David Bremner <david@tethera.net> writes:
>
>> It's definitely an improvement, and it fixes the scenario I reported. On
>> the other hand, if the use corrupts the #secure tag then essentially the
>> same behaviour results. Would it be possible to have a strict mode where
>> any unknown mml tag causes an error?
>
> I don't think it's possible to do that in general -- for instance, if
> the user removes the first three characters from the MML tag (leaving a
> line with just "ecure ..."), then Message can't know that it's supposed
> to be secure...
>
> So I don't see any way to do this in general, and I'm closing this bug
> report.
>
I don't think the fact that we can't do a perfect job is a reason not to
improve the error checking. There are many errors that can be detected
that currently are not. Is erroring on an unknown mml tag (which
nonethless actually looks like a tag) actually difficult?
d
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2019-09-23 12:18 ` David Bremner
@ 2019-09-23 13:53 ` Lars Ingebrigtsen
2019-09-24 10:49 ` Daniel Kahn Gillmor
0 siblings, 1 reply; 11+ messages in thread
From: Lars Ingebrigtsen @ 2019-09-23 13:53 UTC (permalink / raw)
To: David Bremner; +Cc: 18513, Daniel Kahn Gillmor, Daiki Ueno
David Bremner <david@tethera.net> writes:
> I don't think the fact that we can't do a perfect job is a reason not to
> improve the error checking. There are many errors that can be detected
> that currently are not. Is erroring on an unknown mml tag (which
> nonethless actually looks like a tag) actually difficult?
It's not difficult to bug out on <#unknown>, but since Message mode
buffers mostly free text, doing so would lead to people having their
emails fail if they were to type such a thing by hand. MML is only
recognised if it's one of the keywords it er recognises.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2019-09-23 13:53 ` Lars Ingebrigtsen
@ 2019-09-24 10:49 ` Daniel Kahn Gillmor
2019-09-25 13:05 ` Lars Ingebrigtsen
0 siblings, 1 reply; 11+ messages in thread
From: Daniel Kahn Gillmor @ 2019-09-24 10:49 UTC (permalink / raw)
To: Lars Ingebrigtsen, David Bremner; +Cc: 18513, Daiki Ueno
[-- Attachment #1: Type: text/plain, Size: 2049 bytes --]
On Mon 2019-09-23 15:53:50 +0200, Lars Ingebrigtsen wrote:
> David Bremner <david@tethera.net> writes:
>
>> I don't think the fact that we can't do a perfect job is a reason not to
>> improve the error checking. There are many errors that can be detected
>> that currently are not. Is erroring on an unknown mml tag (which
>> nonethless actually looks like a tag) actually difficult?
>
> It's not difficult to bug out on <#unknown>, but since Message mode
> buffers mostly free text, doing so would lead to people having their
> emails fail if they were to type such a thing by hand. MML is only
> recognised if it's one of the keywords it er recognises.
It seems to me that there's a sensible balance to be struck, where MML
can carve out a recognizable, predictable space, while still not causing
unncessary failures.
For example, it could try to interpret every sequence that starts with
the two characters U+003C LESS-THAN SIGN, U+0023 NUMBER, and ends with
U+003E GREATER-THAN SIGN, if those characters are all on a single
line. (does mml handle tags split across multiple lines?)
But since the goal of this bug report, afaict, is to reduce user error
when composing and sending mail in mml-mode, UI/UX feedback choices are
pretty critical to making this work right.
I do note that mml-mode itself offers some help, because it seems to
apply a different textual style to strings that mml will act on. As
long as the user can visually distinguish between these textual styles,
and assuming that the matching rules in mml-mode are precisely aligned
with the mml-based transformation that happens just before a buffer is
sent, then the user has some amount of feedback -- but i'm not sure that
both of those assumptions holds in a buffer during arbitrary editing.
Does it?
Even better UX would be a distinct textual style between a
valid/actionable mml-tag and an mml-tag that has an error in it, so that
the user oomposing the buffer has immediate feedback about potentially
problematic strings.
Thanks for maintaining MML!
--dkg
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^ permalink raw reply [flat|nested] 11+ messages in thread
* bug#18513: 24.3; message-mode sends unencrypted on error
2019-09-24 10:49 ` Daniel Kahn Gillmor
@ 2019-09-25 13:05 ` Lars Ingebrigtsen
0 siblings, 0 replies; 11+ messages in thread
From: Lars Ingebrigtsen @ 2019-09-25 13:05 UTC (permalink / raw)
To: Daniel Kahn Gillmor; +Cc: David Bremner, 18513, Daiki Ueno
Daniel Kahn Gillmor <dkg@fifthhorseman.net> writes:
>> It's not difficult to bug out on <#unknown>, but since Message mode
>> buffers mostly free text, doing so would lead to people having their
>> emails fail if they were to type such a thing by hand. MML is only
>> recognised if it's one of the keywords it er recognises.
>
> It seems to me that there's a sensible balance to be struck, where MML
> can carve out a recognizable, predictable space, while still not causing
> unncessary failures.
>
> For example, it could try to interpret every sequence that starts with
> the two characters U+003C LESS-THAN SIGN, U+0023 NUMBER, and ends with
> U+003E GREATER-THAN SIGN, if those characters are all on a single
> line. (does mml handle tags split across multiple lines?)
But that would trigger on this <#no-mml tag> and would annoy people.
> I do note that mml-mode itself offers some help, because it seems to
> apply a different textual style to strings that mml will act on. As
> long as the user can visually distinguish between these textual styles,
> and assuming that the matching rules in mml-mode are precisely aligned
> with the mml-based transformation that happens just before a buffer is
> sent, then the user has some amount of feedback -- but i'm not sure that
> both of those assumptions holds in a buffer during arbitrary editing.
> Does it?
I think so.
But perhaps there should be a secondary level of testing for
encryption-related commands. That is, if you've typed `C-c C-m c p'
(for instance), and then the MML parser doesn't find any encryption tags
in the buffer, then it could ask something like "You indicated that you
wanted this to be encrypted, but it won't be; send anyway?"
I mean, you may have used that command and then removed the "secure"
tag because you changed your mind, so completely refusing to send
probably isn't a good idea.
This warning stuff could be done via a buffer-local variable, I
guess... Although that wouldn't survive a round trip to the drafts
group.
Perhaps a header?
User-Wants-Encryption: yes
?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2019-09-25 13:05 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-09-20 6:12 bug#18513: 24.3; message-mode sends unencrypted on error David Bremner
2014-09-29 11:09 ` Daiki Ueno
2014-09-29 12:14 ` David Bremner
2014-09-30 1:36 ` Daiki Ueno
2019-09-23 11:46 ` Lars Ingebrigtsen
2019-09-23 12:18 ` David Bremner
2019-09-23 13:53 ` Lars Ingebrigtsen
2019-09-24 10:49 ` Daniel Kahn Gillmor
2019-09-25 13:05 ` Lars Ingebrigtsen
2014-10-01 1:28 ` Glenn Morris
2014-10-01 2:32 ` Daiki Ueno
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