[pkg-gnupg-maint] Bug#795368: gnupg-agent: Fails to function as a SSH agent with smartcard

[Mark Brown]

Package: gnupg-agent
Version: 2.0.28-3
Severity: important

After some recent upgrades I am no longer able to use a GnuPG smartcard
to authenticate with remote systems using SSH.  I have gnupg-agent
configured as my SSH and am able to see the key with ssh-add -l but if I
try to connect to a remote system SSH displays the error "Agent admitted
failure to sign using the key.".

The agent is still able to ask for passphrases for GnuPG usage, only SSH
usage seems affected.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnupg-agent depends on:
ii  libassuan0                  2.2.1-1
ii  libc6                       2.19-19
ii  libgcrypt20                 1.6.3-2
ii  libgpg-error0               1.19-2
ii  libpth20                    2.0.7-20
ii  libreadline6                6.3-8+b3
ii  pinentry-gnome3 [pinentry]  0.9.5-4
ii  pinentry-gtk2 [pinentry]    0.9.5-4

Versions of packages gnupg-agent recommends:
ii  gnupg   1.4.19-3
ii  gnupg2  2.0.28-3

gnupg-agent suggests no packages.

-- no debconf information