prosody
2e04d54fb013
util/random.lua

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util/random.lua @ 13246:2e04d54fb013

mod_tokenauth: Fix revoking a single token without revoking whole grant This appears to have been a copy-paste of the grant revocation function, or maybe the other way around. Either way, it deleted the whole grant instead of the individual token as might be expected.
author Kim Alvefur <zash@zash.se>
date Sun, 23 Jul 2023 02:54:49 +0200
parent 12975:d10957394a3c
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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
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
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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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9 local ok, crand = pcall(require, "prosody.util.crand");
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10 if ok and pcall(crand.bytes, 1) then return crand; end
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11
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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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15 local data, err = urandom:read(n);
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16 if not data then
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17 if err then
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18 error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err));
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19 else
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20 error("Secure random number generator (/dev/urandom) returned an end-of-file condition");
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21 end
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22 end
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23 return data;
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24 end
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25
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26 if not urandom then
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27 function bytes()
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28 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
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29 end
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30 end
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31
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32 return {
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33 bytes = bytes;
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34 _source = "/dev/urandom";
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35 };