prosody: util/random.lua@51cf09bb74eb (annotated)

6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	1	-- Prosody IM
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	2	-- Copyright (C) 2008-2014 Matthew Wild
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	3	-- Copyright (C) 2008-2014 Waqas Hussain
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	4	--
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	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> parents: diff changeset	6	-- COPYING file in the source package for more information.
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	7	--
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	8
7117 51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	9	local urandom, urandom_err = io.open("/dev/urandom", "r");
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	10
7086 ac920b0f9eae util.random: Open /dev/urandom read-only, make seed() a noop Kim Alvefur <zash@zash.se> parents: 7053 diff changeset	11	local function seed()
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	12	end
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	13
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	14	local function bytes(n)
7053 ae044691de0f util.random: Use /dev/urandom Kim Alvefur <zash@zash.se> parents: 6424 diff changeset	15	return urandom:read(n);
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	16	end
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	17
7117 51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	18	if not urandom then
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	19	function bytes()
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	20	error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")");
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	21	end
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	22	end
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7086 diff changeset	23
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	24	return {
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	25	seed = seed;
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	26	bytes = bytes;
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	27	};

author	Kim Alvefur <zash@zash.se>
	Sun, 31 Jan 2016 17:27:15 +0100
changeset 7117	51cf09bb74eb
parent 7086	ac920b0f9eae
child 7190	3d2c2f0809ee
permissions	-rw-r--r--