bug#12923: 24.2; epa-file--find-file-not-found-function: Opening input file: Can't decrypt, Exit

[Oleksandr Gavenko]

When I try open any .gpg files I get error:

  epa-file--find-file-not-found-function: Opening input file: Can't decrypt, 
Exit

Root of issue come from Emacs call:

  $ gpg "--no-tty" "--status-fd" "1" "--yes" "--enable-progress-filter" \
  "--command-fd" "0" "--output" "/tmp/epg-output3999nru" \
  "--decrypt" "--" "/home/user/.gnupg/pubring.gpg"

  gpg: WARNING: unsafe enclosing directory permissions on configuration file 
`/home/user/.gnupg/gpg.conf'
  [GNUPG:] PROGRESS /home/user/.gnupg/pu ? 0 22238
  [GNUPG:] UNEXPECTED 0
  gpg: decrypt_message failed: unexpected data

from call stack:

  epa-file-insert-file-contents --> epg-decrypt-file
    --> epg-start-decrypt --> epg--start
        --> (setq process
          (apply #'start-process "epg" buffer
                       (if (eq (epg-context-protocol context) 'CMS)
                           epg-gpgsm-program
                         epg-gpg-program)
                       args))

So this error occur on opening files with '.gpg' extension.

See also:

  http://unix.stackexchange.com/questions/28330/emacs-auto-encryption-and-gpg

  http://comments.gmane.org/gmane.emacs.bugs/38903
                gnupg support is no longer able to create .gpg files from
                scratch

================================================================

In GNU Emacs 24.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10)
 of 2012-09-09 on trouble, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
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/24.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.2/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars'
 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

Minor modes in effect:
  diff-auto-refine-mode: t
  shell-dirtrack-mode: t
  desktop-save-mode: t
  which-function-mode: t
  auto-image-file-mode: t
  icomplete-mode: t
  iswitchb-mode: t
  show-paren-mode: t
  global-hl-line-mode: t
  delete-selection-mode: t
  global-hi-lock-mode: t
  display-time-mode: t
  recentf-mode: t
  yas/global-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Decrypting /home/user/.gnupg/pubring.gpg...0%
epa-file--find-file-not-found-function: Opening input file: Can't decrypt, 
Unexpected; Exit

Load-path shadows:
/usr/share/emacs/24.2/site-lisp/cmake-data/cmake-mode hides 
/usr/share/emacs/site-lisp/cmake-mode
/usr/share/emacs/24.2/site-lisp/cscope/xcscope hides 
/usr/share/emacs/site-lisp/xcscope
/usr/share/emacs24/site-lisp/quilt-el/quilt hides 
/usr/share/emacs/site-lisp/quilt
/usr/share/emacs24/site-lisp/flim/md4 hides /usr/share/emacs/24.2/lisp/md4
/usr/share/emacs24/site-lisp/flim/hex-util hides 
/usr/share/emacs/24.2/lisp/hex-util
/usr/share/emacs24/site-lisp/dictionaries-common/ispell hides 
/usr/share/emacs/24.2/lisp/textmodes/ispell
/usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides 
/usr/share/emacs/24.2/lisp/textmodes/flyspell
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.2/lisp/textmodes/rst
/usr/share/emacs24/site-lisp/flim/ntlm hides /usr/share/emacs/24.2/lisp/net/ntlm
/usr/share/emacs24/site-lisp/flim/hmac-def hides 
/usr/share/emacs/24.2/lisp/net/hmac-def
/usr/share/emacs24/site-lisp/flim/sasl hides /usr/share/emacs/24.2/lisp/net/sasl
/usr/share/emacs24/site-lisp/flim/sasl-digest hides 
/usr/share/emacs/24.2/lisp/net/sasl-digest
/usr/share/emacs24/site-lisp/flim/hmac-md5 hides 
/usr/share/emacs/24.2/lisp/net/hmac-md5
/usr/share/emacs24/site-lisp/flim/sasl-cram hides 
/usr/share/emacs/24.2/lisp/net/sasl-cram
/usr/share/emacs24/site-lisp/flim/sasl-ntlm hides 
/usr/share/emacs/24.2/lisp/net/sasl-ntlm
/usr/share/emacs24/site-lisp/latex-cjk-thai/thai-word hides 
/usr/share/emacs/24.2/lisp/language/thai-word
/usr/share/emacs24/site-lisp/emms/tq hides 
/usr/share/emacs/24.2/lisp/emacs-lisp/tq
/usr/share/emacs/site-lisp/emacs-jabber/srv hides 
/home/user/usr/share/emacs/site-lisp/srv
/usr/share/emacs/24.2/lisp/emacs-lisp/ert hides 
/home/user/usr/share/emacs/site-lisp/nxhtml/tests/ert
/home/user/usr/share/emacs/site-lisp/rnc-mode hides 
/home/user/usr/share/emacs/site-lisp/nxhtml/util/rnc-mode
/usr/share/emacs/24.2/lisp/emacs-lisp/chart hides 
/home/user/usr/share/emacs/site-lisp/nxhtml/util/chart
/usr/share/emacs/24.2/lisp/htmlfontify hides 
/home/user/usr/share/emacs/site-lisp/nxhtml/util/htmlfontify

Features:
(shadow emacsbug log-view find-dired grep cl-specs edebug debug diff-mode
vc-git vc-bzr vc-sccs vc-cvs vc-rcs vc-dir ewoc dired-aux debian-copyright
readme-debian debian-changelog-mode tar-mode deb-view shell dabbrev term ehelp
electric tabify man generic apt-utils log-edit pcvs-util add-log vc ediff-merg
ediff-diff ediff-wind ediff-help ediff-util ediff-mult ediff-init ediff
epa-file epa epg reporter debian-bug canlock quail help-mode view newcomment
browse-url url-util url-handlers url-parse url-vars qp misearch multi-isearch
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network-stream auth-source eieio starttls nnimap parse-time tls utf7 netrc
gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu
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rng-match rng-dt rng-util rng-pttrn nxml-ns nxml-mode nxml-outln nxml-rap
nxml-util nxml-glyph nxml-enc xmltok rst flyspell ispell sh-script executable
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org-vm org-rmail org-mhe org-mew org-irc org-jsinfo org-infojs org-html
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cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
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warnings bytecomp byte-compile cconv macroexp ob-emacs-lisp ob-tangle ob-ref
ob-lob ob-table org-footnote org-src ob-comint ob-keys ob ob-eval
org-pcomplete pcomplete org-list org-faces org-compat org-entities org-macs
noutline outline format-spec cal-menu calendar cal-loaddefs remember jdone
image-file jka-compr ls-lisp ffap dired saveplace icomplete uniquify iswitchb
paren hl-line delsel hi-lock generic-x disp-table server time avoid recentf
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kmacro easymenu assoc w3m-load slime-autoloads compile comint regexp-opt
ansi-color ring mmm-auto mmm-vars mmm-compat cl emms-auto jabber-autoloads
emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode
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register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
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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
files text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)

-- 
Best regards!