prosody
c3011ab945b8
util/random.lua

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util/random.lua @ 6421:c3011ab945b8

util.random: Ensure at least 4 bytes of previous random state is used when generating new randomness
author Kim Alvefur <zash@zash.se>
date Thu, 18 Sep 2014 10:21:38 +0200
parent 6420:0c070e30a7db
child 7050:ae044691de0f
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equal deleted inserted replaced
6420:0c070e30a7db 6421:c3011ab945b8
29 local function seed(x) 29 local function seed(x)
30 buffer = new_random(buffer..x); 30 buffer = new_random(buffer..x);
31 end 31 end
32 32
33 local function bytes(n) 33 local function bytes(n)
34 if #buffer < n then seed(uniq_time()); end 34 if #buffer < n+4 then seed(uniq_time()); end
35 local r = buffer:sub(0, n); 35 local r = buffer:sub(1, n);
36 buffer = buffer:sub(n+1); 36 buffer = buffer:sub(n+1);
37 return r; 37 return r;
38 end 38 end
39 39
40 return { 40 return {