OpenSSH 5.4 bug fixed in 5.5

[Matthieu Michaud]

I would like to share a solution of a problem I faced with the current 
version of OpenSSH in 8-STABLE (5.4p1).

Last upgrade of my system updated OpenSSH from 5.2p1 to 5.4p1 which has 
a regression for those using a non-default AuthorizedKeysFile option set 
to a relative path (".ssh/keys" in my case). If you are using the 
default you are not affected.

As I had authentication mechanism restricted to public keys and this 
parameter expands to //.ssh/keys with the regression I wasn't able to 
access my server after restart.

It's fixed in 5.5p1 which is not yet imported in the 8-STABLE branch.

To get back this option working you either have to wait for 5.5p1 merge 
to 8-STABLE, install it yourself or import the following patch from the 
vendor and rebuild sshd. I opted for the last solution. Here's how I did 
it :

cd /usr/src/crypto/openssh

fetch -o - 
'http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/servconf.c.diff?r1=1.207;r2=1.204' 
| patch

cd /usr/src/secure/usr.sbin/sshd
make obj depend
make all
make install

Hope it helps,
Matthieu