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Per rwatson's request:

Browse source 
"If you don't get a review within a day or two, I would firmly recommend
backing out the changes"

back out all my changes as unreviewed by secteam@ yet.
This commit is contained in:
Andrey A. Chernov 2008-07-25 15:53:32 +00:00
parent 6a05bf3acf
commit fff6495ea6
1 changed files with 4 additions and 7 deletions
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11
sys/libkern/arc4random.c
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@ -69,21 +69,18 @@ arc4_randomstir (void)
arc4_j = (arc4_j + arc4_sbox[n] + key[n]) % 256;
arc4_swap(&arc4_sbox[n], &arc4_sbox[arc4_j]);
}
arc4_i = arc4_j = 0;
/* Reset for next reseed cycle. */
arc4_t_reseed = tv_now.tv_sec + ARC4_RESEED_SECONDS;
arc4_numruns = 0;
/*
* Throw away the first N bytes of output, as suggested in the
* Throw away the first N words of output, as suggested in the
* paper "Weaknesses in the Key Scheduling Algorithm of RC4"
* by Fluher, Mantin, and Shamir. N=768 is based on
* suggestions in the paper "(Not So) Random Shuffles of RC4"
* by Ilya Mironov.
* by Fluher, Mantin, and Shamir. (N = 256 in our case.)
*/
for (n = 0; n < 768; n++)
(void)arc4_randbyte();
for (n = 0; n < 256*4; n++)
arc4_randbyte();
mtx_unlock(&arc4_mtx);
}