[sshfs] ssh key-based authentication permission issue

[Laurent P. <lau...@gm...>]

Hi,

I'm facing a strange problem with sshfs.

As user1, I use sshfs to mount "<remotehost>:/home/user2" locally into
/home/user2.  This works correctly, as I can see all the files, read/write
to them, etc.  I have a "user2" account locally, with the same UID as on the
remote host.

The problem is when I try this :
(as user1)> ssh user2@localhost
I get a "permission denied (publickey)" error.  I'm using key based
authentication, so it's using /home/user2/.ssh/id_rsa, which is in the sshfs
mounted directory.

If, instead of using sshfs, I mount the same directory using NFS, I don't
have that problem.  This means that the shared key setting is correct, it's
only when used over a sshfs mounted directory that the problem happens.

I'm suspecting something related to how sshfs handle permissions (since I
know that key based authentication is picky on file permission) , but I may
be wrong on that...

Any ideas on what may be the problem?

Thanks,

Laurent Parenteau