I think I broke ssh today.
So I send my public ssh key to a colleague to begin working on Android project, via ssh/svn. It doesn't work. I am convinced it must be a problem on his end because I use my key with about 10 or so servers with no problems. I get the user/pass to his server to run an ssh-copy-id and see what happens with my own eyes. Shocker, it doesn't work. Immediately I think there must be something on his server causing the issue, since last week I copied my key over to a new linux machine here in the office and everything worked fine. I deleted the autorized keys from that new machine, and issued an ssh-copy-id and guess what? It didn't work. The key is in authorized_keys, but something is off.
So at this point I have my ssh key failing on the same machine it worked on last week. Since this was my control variable, I knew something must be off on my end. Ultimately, what I did was wiped my keys, rebuilt them(DSA) and received this error:
"Agent admitted failure to sign using the key." which led me to this. I didn't even wan to begin with that mess, and looked into just uninstalling and reinstalling ssh, at which point synaptic told me that it would also have to remove ubuntu-desktop. Uhmm, no?
Plan E(or whatever we are on at this point) is to rebuild the keys a la RSA. Which I did, and now everything works. This makes no sense, and below is my log in case you can see a typo that I may have missed? This involves HostA and HostB, hostB is my control, hostA is the svn machine.
stk@stk-sys76u810:~$ ssh smf@10.202.3.123 'rm .ssh/authorized_keys'
smf@10.202.3.123's password:
stk@stk-sys76u810:~$ ssh root@172.31.202.3 'rm .ssh/authorized_keys'
root@172.31.202.3's password:
stk@stk-sys76u810:~$ ssh-copy-id -i ~/.ssh/id_dsa.pub smf@10.202.3.123
smf@10.202.3.123's password:
Now try logging into the machine, with "ssh 'smf@10.202.3.123'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
stk@stk-sys76u810:~$ ssh smf@10.202.3.123
smf@10.202.3.123's password:
[[wtf?]]
stk@stk-sys76u810:~$ ssh-copy-id -i ~/.ssh/id_dsa.pub root@172.31.202.3
root@172.31.202.3's password:
Now try logging into the machine, with "ssh 'root@172.31.202.3'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
stk@stk-sys76u810:~$ ssh root@172.31.202.3
Last login: Tue Jun 16 08:27:32 2009 from 10.202.3.58
Linux HostB 2.6.15-29-server #1 SMP Wed Aug 29 14:26:14 UTC 2007 i686 GNU/Linux
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
You have new mail.
root@HostB:~#