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random: Correct wording in a comment

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In the calculation of the cutoff value, we haven't changed the window
size itself, just the example formula, which takes the window size as a
parameter.

Reviewed by:	cem
Fixes:		f92ff79720 ("random: Add NIST SP 800-90B entropy source health test implementations")
Sponsored by:	Stormshield
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D52002
This commit is contained in:
Mark Johnston 2025-08-19 14:04:57 +00:00
parent b9b0e105c3
commit 3d4d778262
1 changed files with 3 additions and 3 deletions
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6
sys/dev/random/random_harvestq.c
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@ -493,9 +493,9 @@ random_healthtest_init(enum random_entropy_source source)
* The RCT limit comes from the formula in section 4.4.1.
*
* The APT cutoff is calculated using the formula in section 4.4.2
* footnote 10 with the window size changed from 512 to 511, since the
* test as written counts the number of samples equal to the first
* sample in the window, and thus tests W-1 samples.
* footnote 10 with the number of Bernoulli trials changed from W to
* W-1, since the test as written counts the number of samples equal to
* the first sample in the window, and thus tests W-1 samples.
*/
ht->ht_rct_limit = 35;
ht->ht_apt_cutoff = 330;