#10 Ssh authentication with keys

[Nicolás del Río]

SSh authentication fails when a user intends to
authenticate using keys and the user ID that wants to
login is different from the System user id, or the user
id that is owner of this process. Otherwise this works
fine when the user athenticates using username and
password.
The error i'm having is:

sshd: PID 3304: fatal setreuid 510: Permission denied