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35 lines
940 B
35 lines
940 B
-- Prosody IM
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-- Copyright (C) 2008-2014 Matthew Wild
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-- Copyright (C) 2008-2014 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local ok, crand = pcall(require, "prosody.util.crand");
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if ok and pcall(crand.bytes, 1) then return crand; end
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local urandom, urandom_err = io.open("/dev/urandom", "r");
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local function bytes(n)
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local data, err = urandom:read(n);
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if not data then
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if err then
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error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err));
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else
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error("Secure random number generator (/dev/urandom) returned an end-of-file condition");
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end
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end
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return data;
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end
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if not urandom then
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function bytes()
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error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
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end
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end
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return {
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bytes = bytes;
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_source = "/dev/urandom";
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};
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