prosody
201d0df6cce9
util/random.lua

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util/random.lua @ 7831:201d0df6cce9

util.crand: Comment about getrandom
author Kim Alvefur <zash@zash.se>
date Sun, 22 Jan 2017 09:55:44 +0100
parent 7187:3d2c2f0809ee
child 8241:e7496cff1215
child 8242:177873dc9cf3
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6376
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
Matthew Wild <mwild1@gmail.com>
parents:
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1 -- Prosody IM
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
Matthew Wild <mwild1@gmail.com>
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2 -- Copyright (C) 2008-2014 Matthew Wild
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
Matthew Wild <mwild1@gmail.com>
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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
Matthew Wild <mwild1@gmail.com>
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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
Matthew Wild <mwild1@gmail.com>
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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 --
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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8
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3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG
Kim Alvefur <zash@zash.se>
parents: 7114
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9 local ok, crand = pcall(require, "util.crand");
3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG
Kim Alvefur <zash@zash.se>
parents: 7114
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10 if ok then return crand; end
3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG
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11
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51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
Kim Alvefur <zash@zash.se>
parents: 7083
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12 local urandom, urandom_err = io.open("/dev/urandom", "r");
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13
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ac920b0f9eae util.random: Open /dev/urandom read-only, make seed() a noop
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14 local function seed()
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15 end
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16
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
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17 local function bytes(n)
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ae044691de0f util.random: Use /dev/urandom
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18 return urandom:read(n);
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19 end
bd812a7713ad util.random: Generic util lib for generating strings of random bytes
Matthew Wild <mwild1@gmail.com>
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20
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51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
Kim Alvefur <zash@zash.se>
parents: 7083
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21 if not urandom then
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
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parents: 7083
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22 function bytes()
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid
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parents: 7083
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23 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
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parents: 7083
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24 end
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parents: 7083
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25 end
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26
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27 return {
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28 seed = seed;
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29 bytes = bytes;
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30 };