Public bug reported:
LibreOffice should be able to digitally sign a document with a GPG
private key in the GPG key chain. However, the key is not listed in the
list of certificates shown following the menu File - Digital Signatures
- Digital Signatures... - Sign Document..., after, e.g., creating and
saving a document on LibreOffice Writer.
This seems to be because apparmor doesn't allow LibreOffice to
communicate with GPG agent. /var/log/syslog shows lines like:
Jul 1 15:15:14 misoan kernel: [20238.265212] audit: type=1400
audit(1593652514.311:333): apparmor="DENIED" operation="connect" profile
="libreoffice-soffice//gpg" name="/run/user/1001/gnupg/S.gpg-agent"
pid=23725 comm="gpg" requested_mask="wr" denied_mask="wr" fsuid=1001
ouid=1001
Locally, I could make LibreOffice show the GPG private key with the
following change against
/etc/apparmor.d/usr.lib.libreoffice.program.soffice.bin
--- apparmor.d.20200702/usr.lib.libreoffice.program.soffice.bin 2019-10-03
10:31:21.000000000 -1000
+++ apparmor.d/usr.lib.libreoffice.program.soffice.bin 2020-07-02
08:59:44.516754728 -1000
@@ -223,6 +223,7 @@
owner @{HOME}/.gnupg/* r,
owner @{HOME}/.gnupg/random_seed rk,
+ owner /{,var/}run/user/*/** rw,
}
# probably should become a subprofile like gpg above, but then it doesn't
Tested with the following packages on Xfce4
$ lsb_release -rd
Description: Ubuntu 20.04 LTS
Release: 20.04
$ apt-cache policy libreoffice-common | grep Installed
Installed: 1:6.4.3-0ubuntu0.20.04.1
$ apt-cache policy gpg gpg-agent | grep -B1 Installed
gpg:
Installed: 2.2.19-3ubuntu2
--
gpg-agent:
Installed: 2.2.19-3ubuntu2
$ apt-cache policy apparmor | grep Installed
Installed: 2.13.3-7ubuntu5.1
** Affects: libreoffice (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1886092
Title:
libreoffice doesn't list gpg private key for a digital signature
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