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-rw-r--r--util/random.lua31
1 files changed, 31 insertions, 0 deletions
diff --git a/util/random.lua b/util/random.lua
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index 00000000..b2d0000d
--- /dev/null
+++ b/util/random.lua
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+-- Prosody IM
+-- Copyright (C) 2008-2014 Matthew Wild
+-- Copyright (C) 2008-2014 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local ok, crand = pcall(require, "util.crand");
+if ok then return crand; end
+
+local urandom, urandom_err = io.open("/dev/urandom", "r");
+
+local function seed()
+end
+
+local function bytes(n)
+ return urandom:read(n);
+end
+
+if not urandom then
+ function bytes()
+ error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
+ end
+end
+
+return {
+ seed = seed;
+ bytes = bytes;
+ _source = "/dev/urandom";
+};