Mercurial > xmpp-mass-pep-downloader / file comparison
comparison: util/random.lua
util/random.lua
- changeset 0
- 550f506de75a
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| -1:000000000000 | 0:550f506de75a |
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| 1 -- Prosody IM | |
| 2 -- Copyright (C) 2008-2014 Matthew Wild | |
| 3 -- Copyright (C) 2008-2014 Waqas Hussain | |
| 4 -- | |
| 5 -- This project is MIT/X11 licensed. Please see the | |
| 6 -- COPYING file in the source package for more information. | |
| 7 -- | |
| 8 | |
| 9 local ok, crand = pcall(require, "util.crand"); | |
| 10 if ok then return crand; end | |
| 11 | |
| 12 local urandom, urandom_err = io.open("/dev/urandom", "r"); | |
| 13 | |
| 14 local function bytes(n) | |
| 15 local data, err = urandom:read(n); | |
| 16 if not data then | |
| 17 if err then | |
| 18 error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err)); | |
| 19 else | |
| 20 error("Secure random number generator (/dev/urandom) returned an end-of-file condition"); | |
| 21 end | |
| 22 end | |
| 23 return data; | |
| 24 end | |
| 25 | |
| 26 if not urandom then | |
| 27 function bytes() | |
| 28 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")"); | |
| 29 end | |
| 30 end | |
| 31 | |
| 32 return { | |
| 33 bytes = bytes; | |
| 34 _source = "/dev/urandom"; | |
| 35 }; |
