Random source seeding and /etc/rc.d/sshd host key generation

From: Ed Maste (emaste_at_phaedrus.sandvine.ca)
Date: 03/29/05

  • Next message: Brooks Davis: "Re: Random source seeding and /etc/rc.d/sshd host key generation" 
    Date: Mon, 28 Mar 2005 17:00:22 -0500
To: freebsd-current@freebsd.org

    In /etc/rc.d/sshd, user_reseed() does

    seeded=`sysctl -n kern.random.sys.seeded 2>/dev/null`
        if [ "${seeded}" != "" ] ; then
            warn "Setting entropy source to blocking mode."
            echo "===================================================="
            echo "Type a full screenful of random junk to unblock"
            ...

    I'm curious if checking the seeded sysctl against "" is intentional;
    it seems $seeded will always be non-null. Since user_reseed only
    gets called if the host keys don't exist it probably won't be much
    of an issue in practice, but it seems random junk will be requested
    on the first boot even if the entropy source is already seeded.

    -ed
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  • Next message: Brooks Davis: "Re: Random source seeding and /etc/rc.d/sshd host key generation"