The branch stable/12 has been updated by obrien:
URL:
https://cgit.FreeBSD.org/src/commit/?id=2cc41234353f4fff0b55984367b60748b67481ec
commit 2cc41234353f4fff0b55984367b60748b67481ec
Author: Conrad Meyer <c...@freebsd.org>
AuthorDate: 2018-10-20 20:12:57 +0000
Commit: David E. O'Brien <obr...@freebsd.org>
CommitDate: 2021-08-06 00:28:00 +0000
Fortuna: Add trivial assert to match FS&K definition
FS&K GenerateBlocks function asserts C (counter) != 0. This should also
be true in our implementation.
Reviewed by: delphij, markm
Approved by: secteam (delphij)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D16936
(cherry picked from commit 84880efae7040bb55e6f63166f53158135574e3a)
---
sys/dev/random/fortuna.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sys/dev/random/fortuna.c b/sys/dev/random/fortuna.c
index d203c2f138a1..7b4193b528d4 100644
--- a/sys/dev/random/fortuna.c
+++ b/sys/dev/random/fortuna.c
@@ -310,6 +310,8 @@ random_fortuna_genblocks(uint8_t *buf, u_int blockcount)
u_int i;
RANDOM_RESEED_ASSERT_LOCK_OWNED();
+ KASSERT(!uint128_is_zero(fortuna_state.fs_counter), ("FS&K: C != 0"));
+
for (i = 0; i < blockcount; i++) {
/*-
* FS&K - r = r|E(K,C)
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