Review of yubikey selinux policy

[William Brown]

Hi,

The current policy for yubikeys only takes into account the otp
functions. In addition, the pam module supports a local challenge
response mode. 

I have attached a patch to allow chap to work for yubikeys with selinux
enabled. To note is that I have added a auth_home_rw_t type, as the pam
module reads from ~/.yubico/challenge-<tokenid> and then rewrites it
with a new challenge after the attempt. 

I would like to especially ask that the section for the chap tunable
policy be reviewed. In my testing, it seemed that login_pgm wasn't
sufficient, as staff_sudo_t didn't seem to be covered by this which is
why I have added the sudodomain components. I would like to know if
there is a better way to resolve this. 

Sincerely,

-- 
William Brown <william at firstyear.id.au>
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