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Date:      Fri, 06 Oct 2017 00:57:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 222807] PURE entropy sources are harvested but not mixed in. Also, min-entropy low per SP800-90B measurements
Message-ID:  <bug-222807-8-BMZW1srseQ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-222807-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-222807-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222807

--- Comment #2 from Conrad Meyer <cem@freebsd.org> ---
(In reply to W. Dean Freeman from comment #1)
For this 2nd patch, I don't see any value in making it optional.  Does that
seem reasonable to you or can you make a case for the HBSD_RANDOM_HIGH_ENTR=
OPY
option?

Also re: 2nd patch, this code seems totally broken:

+       fortuna_state.fs_pool[pl].fsp_length =3D MIN(RANDOM_FORTUNA_MAXPOOL=
SIZE,
+           fortuna_state.fs_pool[pl].fsp_length +
sizeof(event->he_somecounter) +
+           event->he_size);

Note that fsp_length is of type u_int and RANDOM_FORTUNA_MAXPOOLSIZE is
UINT_MAX.  You aren't doing saturating arithmetic, but instead just
overflowing.

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