* bug#6568: 23.2; easypg opens blank buffer when password is incorrect
@ 2010-07-05 16:00 Leo
2010-07-06 8:47 ` Daiki Ueno
0 siblings, 1 reply; 6+ messages in thread
From: Leo @ 2010-07-05 16:00 UTC (permalink / raw)
To: 6568; +Cc: Daiki Ueno
Assume you have an encrypted file test.gpg and try to open it in emacs.
At the password prompt, type in an incorrect one. A blank buffer is
still opened.
The tricky thing is if you save back the contents in that buffer
(because accidentally you think you have typed in a correct password),
the original content will be gone.
It seems better for easypg not to open a blank buffer when password is
incorrect.
Leo
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#6568: 23.2; easypg opens blank buffer when password is incorrect
2010-07-05 16:00 bug#6568: 23.2; easypg opens blank buffer when password is incorrect Leo
@ 2010-07-06 8:47 ` Daiki Ueno
2010-07-06 9:21 ` Leo
[not found] ` <87sk3vi6pv.fsf@stupidchicken.com>
0 siblings, 2 replies; 6+ messages in thread
From: Daiki Ueno @ 2010-07-06 8:47 UTC (permalink / raw)
To: Leo; +Cc: 6568
[-- Attachment #1: Type: text/plain, Size: 804 bytes --]
Leo <sdl.web@gmail.com> writes:
> Assume you have an encrypted file test.gpg and try to open it in emacs.
> At the password prompt, type in an incorrect one. A blank buffer is
> still opened.
>
> The tricky thing is if you save back the contents in that buffer
> (because accidentally you think you have typed in a correct password),
> the original content will be gone.
>
> It seems better for easypg not to open a blank buffer when password is
> incorrect.
Basically agree. I have worndered for a long time how to implement
this, because error handling in find-file is too complex to control.
One idea is to re-throw the error in find-file-not-found-functions
(patch attached). I'm not sure if this approach is palatable as other
basic Emacs commands. Anyway, testing would be much appreciated.
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: epa-file-no-select-empty.diff --]
[-- Type: text/x-patch, Size: 1253 bytes --]
=== modified file 'lisp/epa-file.el'
--- lisp/epa-file.el 2010-01-13 08:35:10 +0000
+++ lisp/epa-file.el 2010-07-06 08:36:24 +0000
@@ -101,6 +101,14 @@
(insert (epa-file--decode-coding-string string (or coding-system-for-read
'undecided)))))
+(defvar epa-file-error nil)
+(defun epa-file--find-file-not-found-function ()
+ (save-window-excursion
+ (let ((error (copy-sequence epa-file-error)))
+ (ignore (kill-buffer))
+ (signal 'file-error
+ (cons "Opening input file" (cdr error))))))
+
(defvar last-coding-system-used)
(defun epa-file-insert-file-contents (file &optional visit beg end replace)
(barf-if-buffer-read-only)
@@ -126,11 +134,16 @@
(progn
(if replace
(goto-char (point-min)))
+ (add-hook 'find-file-not-found-functions
+ 'epa-file--find-file-not-found-function
+ nil t)
(condition-case error
(setq string (epg-decrypt-file context local-file nil))
(error
(if (setq entry (assoc file epa-file-passphrase-alist))
(setcdr entry nil))
+ (make-local-variable 'epa-file-error)
+ (setq epa-file-error error)
(signal 'file-error
(cons "Opening input file" (cdr error)))))
(make-local-variable 'epa-file-encrypt-to)
[-- Attachment #3: Type: text/plain, Size: 25 bytes --]
Regards,
--
Daiki Ueno
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#6568: 23.2; easypg opens blank buffer when password is incorrect
2010-07-06 8:47 ` Daiki Ueno
@ 2010-07-06 9:21 ` Leo
2010-07-07 9:20 ` Daiki Ueno
[not found] ` <87sk3vi6pv.fsf@stupidchicken.com>
1 sibling, 1 reply; 6+ messages in thread
From: Leo @ 2010-07-06 9:21 UTC (permalink / raw)
To: Daiki Ueno; +Cc: 6568
On 2010-07-06 09:47 +0100, Daiki Ueno wrote:
> Basically agree. I have worndered for a long time how to implement
> this, because error handling in find-file is too complex to control.
>
> One idea is to re-throw the error in find-file-not-found-functions
> (patch attached). I'm not sure if this approach is palatable as other
> basic Emacs commands. Anyway, testing would be much appreciated.
>
> === modified file 'lisp/epa-file.el'
> --- lisp/epa-file.el 2010-01-13 08:35:10 +0000
> +++ lisp/epa-file.el 2010-07-06 08:36:24 +0000
[patch omitted]
Thank you for your prompt action on the bug. Much appreciated.
I have just tested the patch with emacs 23.2 and as far as I can see the
blank buffer is still opened with incorrect passwords or typing C-g at
the password prompt.
Is it plausible to just signal a 'password-error?
BTW, both the magic file and find file functions seem overly complex to
me.
Leo
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#6568: 23.2; easypg opens blank buffer when password is incorrect
2010-07-06 9:21 ` Leo
@ 2010-07-07 9:20 ` Daiki Ueno
2010-07-07 9:53 ` Leo
0 siblings, 1 reply; 6+ messages in thread
From: Daiki Ueno @ 2010-07-07 9:20 UTC (permalink / raw)
To: Leo; +Cc: 6568
Leo <sdl.web@gmail.com> writes:
> On 2010-07-06 09:47 +0100, Daiki Ueno wrote:
> I have just tested the patch with emacs 23.2 and as far as I can see the
> blank buffer is still opened with incorrect passwords or typing C-g at
> the password prompt.
Hmm, using the same version and having epa-file.el manually eval'ed, it
works for me.
> Is it plausible to just signal a 'password-error?
No - because epa-file-insert-file-contents may be called not only from
find-file but also from functions which expect file-error rather than
password-error.
Regards,
--
Daiki Ueno
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#6568: 23.2; easypg opens blank buffer when password is incorrect
2010-07-07 9:20 ` Daiki Ueno
@ 2010-07-07 9:53 ` Leo
0 siblings, 0 replies; 6+ messages in thread
From: Leo @ 2010-07-07 9:53 UTC (permalink / raw)
To: Daiki Ueno; +Cc: 6568
On 2010-07-07 10:20 +0100, Daiki Ueno wrote:
> Leo <sdl.web@gmail.com> writes:
>
>> On 2010-07-06 09:47 +0100, Daiki Ueno wrote:
>> I have just tested the patch with emacs 23.2 and as far as I can see the
>> blank buffer is still opened with incorrect passwords or typing C-g at
>> the password prompt.
>
> Hmm, using the same version and having epa-file.el manually eval'ed, it
> works for me.
The patch seems to work beautifully. Thanks.
What I did last time was 'emacs -q -L EMACS_SRC/lisp' but I might have
compiled the wrong elisp file. Sorry about this.
>> Is it plausible to just signal a 'password-error?
>
> No - because epa-file-insert-file-contents may be called not only from
> find-file but also from functions which expect file-error rather than
> password-error.
>
> Regards,
Regards,
Leo
^ permalink raw reply [flat|nested] 6+ messages in thread
[parent not found: <87sk3vi6pv.fsf@stupidchicken.com>]
end of thread, other threads:[~2010-07-08 1:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2010-07-05 16:00 bug#6568: 23.2; easypg opens blank buffer when password is incorrect Leo
2010-07-06 8:47 ` Daiki Ueno
2010-07-06 9:21 ` Leo
2010-07-07 9:20 ` Daiki Ueno
2010-07-07 9:53 ` Leo
[not found] ` <87sk3vi6pv.fsf@stupidchicken.com>
2010-07-08 1:20 ` Daiki Ueno
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