prosody
21730a3642fe
util/random.lua

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util/random.lua @ 9070:21730a3642fe

Merge 0.10->trunk
author Matthew Wild <mwild1@gmail.com>
date Mon, 30 Jul 2018 15:13:54 +0100
parent 8243:292f61d9d30a
child 10014:5d2f7144fa12
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bd812a7713ad util.random: Generic util lib for generating strings of random bytes
Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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2 -- Copyright (C) 2008-2014 Matthew Wild
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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3 -- Copyright (C) 2008-2014 Waqas Hussain
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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4 --
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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5 -- This project is MIT/X11 licensed. Please see the
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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6 -- COPYING file in the source package for more information.
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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7 --
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8
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3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG
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9 local ok, crand = pcall(require, "util.crand");
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10 if ok then return crand; end
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11
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51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
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12 local urandom, urandom_err = io.open("/dev/urandom", "r");
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13
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14 local function bytes(n)
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ae044691de0f util.random: Use /dev/urandom
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15 return urandom:read(n);
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16 end
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17
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51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
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18 if not urandom then
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19 function bytes()
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20 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
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21 end
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22 end
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23
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24 return {
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25 bytes = bytes;
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177873dc9cf3 util.random: Add a _source field to match util.crand
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26 _source = "/dev/urandom";
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27 };