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Bug 306907 - app-crypt/gnupg: gpg-agent calls pinentry symlink which does not link to binary
Summary: app-crypt/gnupg: gpg-agent calls pinentry symlink which does not link to binary
Status: RESOLVED WORKSFORME
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: x86 Linux
: High normal (vote)
Assignee: Crypto team [DISABLED]
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-02-26 06:49 UTC by MickKi
Modified: 2010-10-19 20:58 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


Attachments
app-crypt:gnupg-2.0.14:20100204-090929.log-20100211 (gnupg-2.0.14.gz,16.00 KB, application/gzip)
2010-02-26 17:40 UTC, MickKi
Details

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Description MickKi 2010-02-26 06:49:23 UTC
The gpg-agent calls pinentry-qt, but this symlink does not exist anymore.  it should call /usr/bin/pinentry instead, or the /usr/bin/pinentry -> /usr/bin/pinentry-qt4.  This is what it looks like on my system:

# ls -la /usr/bin/pin*
lrwxrwxrwx 1 root root     12 Feb 24 07:01 /usr/bin/pinentry -> pinentry-qt4
-rwxr-xr-x 1 root root  38624 Feb 24 07:01 /usr/bin/pinentry-curses
-rwxr-xr-x 1 root root 121548 Feb 24 07:01 /usr/bin/pinentry-qt4
-rwxr-xr-x 1 root root  26120 Oct 20 09:52 /usr/bin/pinky

Without pinentry gpg fails to decrypt files with a general error.  (Not sure if this is related to qt3 being deprecated and therefore qt maintainers should be copied in this?)

I have noticed this on two PCs of mine and therefore I assume that this is probably not a USE flag issue.  Either way, here's my info:
============================================
# emerge --info
Portage 2.1.7.16 (default/linux/x86/10.0/desktop, gcc-4.3.4, glibc-2.10.1-r1, 2.6.31-gentoo-r10 i686)
=================================================================
System uname: Linux-2.6.31-gentoo-r10-i686-Intel-R-_Pentium-R-_III_Mobile_CPU_1066MHz-with-gentoo-1.12.13
Timestamp of tree: Thu, 25 Feb 2010 10:45:02 +0000
ccache version 2.4 [enabled]
app-shells/bash:     4.0_p35
dev-lang/python:     2.6.4
dev-util/ccache:     2.4-r7
dev-util/cmake:      2.6.4-r3
sys-apps/baselayout: 1.12.13
sys-apps/sandbox:    1.6-r2
sys-devel/autoconf:  2.13, 2.63-r1
sys-devel/automake:  1.8.5-r3, 1.9.6-r2, 1.10.3, 1.11.1
sys-devel/binutils:  2.18-r3
sys-devel/gcc:       4.3.4
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   2.2.6b
virtual/os-headers:  2.6.30-r1
ACCEPT_KEYWORDS="x86"
ACCEPT_LICENSE="* -@EULA"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium3 -fomit-frame-pointer -msse -mmmx -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo"
CXXFLAGS="-O2 -march=pentium3 -fomit-frame-pointer -msse -mmmx -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="assume-digests ccache distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch userlocales userpriv usersandbox"
GENTOO_MIRRORS="http://mirror.switch.ch/ftp/mirror/gentoo/ http://mirror.ovh.net/gentoo-distfiles/ http://gentoo.tiscali.nl/ http://gentoo.mirror.solnet.ch http://gentoo.virginmedia.com/ http://ftp.heanet.ie/pub/gentoo/ http://gentoo.intergenia.de"
LDFLAGS="-Wl,-O1"
LINGUAS="en en_GB el"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X a52 aac aalib acl acpi alsa asf atm berkdb bluetooth branding bzip2 cairo ccache cdparanoia cdr cli consolekit cracklib crypt css cups curl cxx dbus divx dri dts dvd dvdr dvdread emboss encode evo fam ffmpeg flac fortran gdbm gif gmedia gpm gstreamer gtalk hal hpn hybrid hybrid-auth iconv idea imagemagick imlib injection irda irmc jabber jpeg kde laptop ldap libnotify live lm_sensors logrotate mad madwifi matroska md5sum mikmod mjpeg mmx mng modplug modules mp3 mp4 mpeg mplayer mudflap nat ncurses nls npp nptl nptlonly nsplugin ntfs ogg opengl openmp pam pcmcia pcre pda pdf perl pmu png ppds pppd python qt3support qt4 quicktime rc5 readline realmedia reflection reiserfs rt2500usb rtsp scanner sdl session smime speex spell spl sqlite sse ssl startup-notification svg svga sysfs tcpd theora thunar tidy tiff truetype unicode usb vcd vidix vorbis vram wifi win32codecs wmf wmp x264 x86 xcomposite xine xml xorg xulrunner xv xvid xvmc yv12 zlib" ALSA_CARDS="maestro3" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en en_GB el" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="radeon" 
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
============================================
-- 
Regards,
Mick
Comment 1 Rafał Mużyło 2010-02-26 10:28:09 UTC
Did you check if it works, if you pass pinentry name
explicitly ? Cause gpg-agent does call 'pinentry' by default.

Attach build log of gnupg.
Comment 2 MickKi 2010-02-26 17:38:09 UTC
(In reply to comment #1)
> Did you check if it works, if you pass pinentry name
> explicitly ? Cause gpg-agent does call 'pinentry' by default.

Hmm ... perhaps something is amiss with my system.  Calling pinentry when launching gpg-agent does not work, the socket that gpg calls thereafter is different to the one that gpg-agent is listening to *and* pinentry fails to launch:
========================================
$ gpg-agent --daemon --no-detach --pinentry-program '/usr/bin/pinentry' --debug-level guru --log-file gpg-agent.log
gpg-agent[2628]: enabled debug flags: command mpi crypto memory cache memstat hashing assuan
GPG_AGENT_INFO=/tmp/gpg-kx8NJ7/S.gpg-agent:2629:1; export GPG_AGENT_INFO;
========================================

The log shows:
========================================
2010-02-25 06:48:32 gpg-agent[6741] DBG: ... miss
2010-02-25 06:48:32 gpg-agent[6741] starting a new PIN Entry
gpg-agent[6741]: can't connect server: `ERR 67109133 can't exec `/usr/bin/pinentry-qt': No such file or directory'
2010-02-25 06:48:32 gpg-agent[6741] can't connect to the PIN entry module: IPC connect call failed
2010-02-25 06:48:32 gpg-agent[6741] command get_passphrase failed: No pinentry
gpg-agent[6741.7] DBG: -> ERR 67108949 No pinentry <GPG Agent>
gpg-agent[6741.7] DBG: <- [EOF]
========================================


This is what my ~/.gnupg/gpg-agent.conf contains:
========================================
# GPGConf disabled this option here at Wed Sep  6 22:59:55 2006 BST
# default-cache-ttl 1800

###+++--- GPGConf ---+++###
pinentry-program /usr/bin/pinentry-qt
no-grab
quiet
verbose
default-cache-ttl 3000
debug-level basic
log-file socket:///home/michael/.gnupg/log-socket
###+++--- GPGConf ---+++### Sun Feb 21 10:26:31 2010 GMT
# GPGConf edited this configuration file.
# It will disable options before this marked block, but it will
# never change anything below these lines.
========================================

So it seems that instead of calling /usr/bin/pinentry, gpg-agent calls /usr/bin/pinentry-qt.  I can fix the symlink manually of course (on both of my machines) but it looks as if that was set up by some GPGconf script?

> Attach build log of gnupg.

Attachment follows.
-- 
Regards,
Mick
Comment 3 MickKi 2010-02-26 17:40:51 UTC
Created attachment 221347 [details]
app-crypt:gnupg-2.0.14:20100204-090929.log-20100211

app-crypt/gnupg-2.0.14 emerge log file.
Comment 4 Rafał Mużyło 2010-02-27 18:15:32 UTC
For future reference: do not attach such abominations.
(AFAICT it's actually tar.gz.gz - yes, twice gziped).
Comment 5 Rafał Mużyło 2010-02-27 18:28:26 UTC
If you look at common/homedir.c, you'll see
that, if GNUPG_DEFAULT_PINENTRY is undefined (as it
seems to be the case), it simply calls pinentry.

Any chance you have an old symlink somewhere in your ${PATH} ?
Comment 6 MickKi 2010-02-27 20:29:34 UTC
(In reply to comment #5)
> If you look at common/homedir.c, you'll see
> that, if GNUPG_DEFAULT_PINENTRY is undefined (as it
> seems to be the case), it simply calls pinentry.
> 
> Any chance you have an old symlink somewhere in your ${PATH} ?
> 

Apologies for the double-gzipped archive - I didn't realise I'd run it twice.

How do I search for the old symlink you mention?  I have the same problem on two different machines.  On one the symlink from /usr/bin/pinentry is pointing to /usr/bin/pinentry-curses on the other (where I have removed qt3 and provided you the logs) to /usr/bin/pinentry-qt4.

I from their age (c. 2007 and 2006 respectively) I assume that these links were created by some gnupg-agent installation or setup script back then.  I can't recall to having made these links myself.  However, if I am the only one reporting it, then it may not be a problem for more recent installations.  I am currently installing Gentoo on a new machine and I will keep an eye on this to see what gets installed.
-- 
Regards,
Mick
Comment 7 Rafał Mużyło 2010-02-27 22:05:02 UTC
Well, this symlink is created by pinentry itself
- the choice is made by configure script (have a look near the end of
configure.ac). However, as during gnupg build default pinentry 
was not overridden, it should run /usr/bin/pinentry.

Any chance you have non-system copy of gnupg somewhere in ${PATH}
or a config file, that sets it to pinentry-qt ?
Comment 8 Rafał Mużyło 2010-02-27 22:10:42 UTC
OK, never mind, I should have read your post properly first
- for that matter, so should you.
Though usually command line overrides config files,
it seems it's different with gnupg.
Doesn't this line give you a hint:
pinentry-program /usr/bin/pinentry-qt

Looks like NOTABUG, unless you count command line not overriding
config file as one (I think I would consider it one,
but perhaps gnupg has a good reason for it).
Comment 9 MickKi 2010-02-28 10:58:55 UTC
Thanks for looking into this problem. I think that we have at least two bugs here:

1. The bug that made me raise this report is the fact that gpg stopped working - evidently the symlink in /usr/bin to the new pinentry binary (/usr/bin/pinentry-qt4) was suddenly not there. The ~/.gnupg/gpg-agent.conf file defines the pinentry-program as /usr/bin/pinentry-qt. This is a setting that was set up automatically by some install/configuration script many moons ago on at least two PCs of mine.  Well, to be more precise on the second PC the pinentry-program was not set up as pinentry-qt, but as pinentry-curses.  So this bug as I see it is that gpg functionality is now broken because the latest updates did not respect this setting, or at least did not raise a warning (as far as I recall) for the user to deal with it.

2. The second bug may be that when I pass:

 --pinentry-program /usr/bin/pinentry-qt 

to gpg at the CLI, gpg seems to ignore it.  I say that this *may* be a bug because I am not sure if I need to use a particular format for defining this option and as you say gpg may have a good (security related?) reason for not using it.

Now, at least 1. above could be due to a legacy setting on my boxen and these days gentoo defaults create the correct symlinks to make sure that gpg-agent continues to function.  If this is the case, I agree that this could be seen as NOTABUG - although legacy settings should at least raise a warning. When I finish a new install in the next few days I will look to see what it shows.  Either way, I am not sure what pinentry should point to in /usr/bin to make sure that gpg works both on the console and in an Xsession.  Can you please show me what ls -la /usr/bin/pinentry* looks like on a default installation - it should help me set up mine correctly.
-- 
Regards,
Mick
Comment 10 Robin Johnson archtester Gentoo Infrastructure gentoo-dev Security 2010-10-19 20:58:10 UTC
(In reply to comment #9)
> 2. The second bug may be that when I pass:
>  --pinentry-program /usr/bin/pinentry-qt 
> 
> to gpg at the CLI, gpg seems to ignore it.
INVALID.
gpg does NOT take a pinentry argument. Only gpg-agent does.


> Can you please
> show me what ls -la /usr/bin/pinentry* looks like on a default installation -
> it should help me set up mine correctly.
Here are two of my systems:
$ ls -la /usr/bin/pinentry*
lrwxrwxrwx 1 root root    14 Sep 27 17:51 /usr/bin/pinentry -> pinentry-gtk-2
-rwxr-xr-x 1 root root 43968 Sep 27 17:51 /usr/bin/pinentry-curses
-rwxr-xr-x 1 root root 98976 Sep 27 17:51 /usr/bin/pinentry-gtk-2
$ ls -la /usr/bin/pinentry*
lrwxrwxrwx 1 root root    15 2010-09-27 23:16 /usr/bin/pinentry -> pinentry-curses
-rwxr-xr-x 1 root root 48848 2010-09-27 23:16 /usr/bin/pinentry-curses

I'm going to close this as WORKSFORME, and just help you fix your system to match everybody else:
1. rm /usr/bin/pinentry* ; emerge -k1 gnupg
2. Fix your configs to not referenced removed files. I'm not sure where that GPGConf block came from, it's not part of the stock install.