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libarchive: backport rc4 crypto requirement update

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Backport upstream libarchive commit 70f497f456 (As per Cryptographic
Requirements, 2017-03-19).  Discard more bytes of the RC4 keystream
to reduce the possibility of non-random bytes.
This commit is contained in:
Brad King
2017-03-21 11:05:28 -04:00
parent e1adec32b8
commit 18009aaf5e
1 changed files with 1 additions and 1 deletions
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Utilities/cmlibarchive/libarchive/archive_random.c
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@@ -222,7 +222,7 @@ arc4_stir(void)
* Discard early keystream, as per recommendations in: * Discard early keystream, as per recommendations in:
* "(Not So) Random Shuffles of RC4" by Ilya Mironov. * "(Not So) Random Shuffles of RC4" by Ilya Mironov.
*/ */
for (i = 0; i < 1024; i++) for (i = 0; i < 3072; i++)
(void)arc4_getbyte(); (void)arc4_getbyte();
arc4_count = 1600000; arc4_count = 1600000;
} }