prosody
5d2f7144fa12
util/random.lua

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util/random.lua @ 10014:5d2f7144fa12 0.11

util.random: Handle unlikely read errors from /dev/urandom (see #1313)
author Kim Alvefur <zash@zash.se>
date Sat, 18 May 2019 17:28:21 +0200
parent 8243:292f61d9d30a
child 10015:8297408db58b
comparison
equal deleted inserted replaced
10013:62d8689beafb 10014:5d2f7144fa12
10 if ok then return crand; end 10 if ok then return crand; end
11 11
12 local urandom, urandom_err = io.open("/dev/urandom", "r"); 12 local urandom, urandom_err = io.open("/dev/urandom", "r");
13 13
14 local function bytes(n) 14 local function bytes(n)
15 return urandom:read(n); 15 local data, err = urandom:read(n);
16 if not data then
17 error("Unable to retrieve data from secure random number generator (/dev/urandom): "..err);
18 end
19 return data;
16 end 20 end
17 21
18 if not urandom then 22 if not urandom then
19 function bytes() 23 function bytes()
20 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")"); 24 error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");