diff options
| author | Loganaden Velvindron <logan@hackers.mu> | 2017-03-17 19:25:03 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2017-03-17 21:46:25 +0100 |
| commit | 66312a40abed2d430361eb262468607f60099c96 (patch) | |
| tree | 455942917bca97c8c6e2295d983b3e5ae60a2587 | |
| parent | 2e4d3492e6627fc9d4c34de104a6ebe6f84ac1e9 (diff) | |
Discard 3072 bytes instead of 256 bytes
This follows the recommendations outlined in Network Operations Division
Cryptographic Requirements published on wikileaks on March 2017.
We discard more bytes of the first keystream to reduce possibility of
non-random bytes.
This is similar to a change in FreeBSD:
https://svnweb.freebsd.org/base?view=revision&revision=315225
Signed-off-by: Loganaden Velvindron <logan@hackers.mu>
| -rw-r--r-- | libc/stdlib/arc4random.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/libc/stdlib/arc4random.c b/libc/stdlib/arc4random.c index 0013612e9..03b2234ae 100644 --- a/libc/stdlib/arc4random.c +++ b/libc/stdlib/arc4random.c @@ -152,10 +152,11 @@ arc4_stir(struct arc4_stream *as) arc4_addrandom(as, rnd, sizeof(rnd)); /* - * Discard early keystream, as per recommendations in: - * http://www.wisdom.weizmann.ac.il/~itsik/RC4/Papers/Rc4_ksa.ps + * Discard early keystream, as per recommendations. + * Network Operations Division Cryptographic requirements + * published on wikileaks on march 2017 */ - for (n = 0; n < 256; n++) + for (n = 0; n < 3072; n++) (void)arc4_getbyte(as); arc4_count = 1600000; } |