diff options
| -rw-r--r-- | util/random.lua | 28 |
1 files changed, 4 insertions, 24 deletions
diff --git a/util/random.lua b/util/random.lua index 5938a94f..4963e98c 100644 --- a/util/random.lua +++ b/util/random.lua @@ -6,35 +6,15 @@ -- COPYING file in the source package for more information. -- -local tostring = tostring; -local os_time = os.time; -local os_clock = os.clock; -local ceil = math.ceil; -local H = require "util.hashes".sha512; - -local last_uniq_time = 0; -local function uniq_time() - local new_uniq_time = os_time(); - if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end - last_uniq_time = new_uniq_time; - return new_uniq_time; -end - -local function new_random(x) - return H(x..os_clock()..tostring({})); -end - -local buffer = new_random(uniq_time()); +local urandom = assert(io.open("/dev/urandom", "r+")); local function seed(x) - buffer = new_random(buffer..x); + urandom:write(x); + urandom:flush(); end local function bytes(n) - if #buffer < n+4 then seed(uniq_time()); end - local r = buffer:sub(1, n); - buffer = buffer:sub(n+1); - return r; + return urandom:read(n); end return { |