prosody-hg: util/random.lua annotate

annotate util/random.lua @ 10486:479e96e554c8

net.server_epoll: Add debug logging for delayed reading In :onreadable, if there is still buffered incoming data after reading from the socket (as indicated by the :dirty method, usually because LuaSocket has an 8k buffer that's full but it read a smaller amount), another attempt to read is scheduled via this :pausefor method. This is also called from some other places where it would be pointless to read because there shouldn't be any data. In the delayed read case, this should report that the socket is "dirty". If it reports that the socket is "clean" then the question is where the buffer contents went? If this doesn't get logged after the scheduled time (0.000001s by default) then this would suggests a problem with timer or scheduling.

author	Kim Alvefur <zash@zash.se>
date	Sat, 07 Dec 2019 19:05:10 +0100
parents	af8c514e5cf7
children	e54b8a5e35ad

rev	line source
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
7187 3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG Kim Alvefur <zash@zash.se> parents: 7114 diff changeset	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 diff changeset	10 if ok then return crand; end
3d2c2f0809ee util.crand: C binding to one of OpenSSL, Linux getrandom() or OpenBSD arc4random() CSPRNG Kim Alvefur <zash@zash.se> parents: 7114 diff changeset	11
7114 51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	12 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	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)
10014 5d2f7144fa12 util.random: Handle unlikely read errors from /dev/urandom (see #1313) Kim Alvefur <zash@zash.se> parents: 8243 diff changeset	15 local data, err = urandom:read(n);
5d2f7144fa12 util.random: Handle unlikely read errors from /dev/urandom (see #1313) Kim Alvefur <zash@zash.se> parents: 8243 diff changeset	16 if not data then
10016 af8c514e5cf7 util.random: Throw different error for EOL condition Kim Alvefur <zash@zash.se> parents: 10015 diff changeset	17 if err then
af8c514e5cf7 util.random: Throw different error for EOL condition Kim Alvefur <zash@zash.se> parents: 10015 diff changeset	18 error("Unable to retrieve data from secure random number generator (/dev/urandom): "..tostring(err));
af8c514e5cf7 util.random: Throw different error for EOL condition Kim Alvefur <zash@zash.se> parents: 10015 diff changeset	19 else
af8c514e5cf7 util.random: Throw different error for EOL condition Kim Alvefur <zash@zash.se> parents: 10015 diff changeset	20 error("Secure random number generator (/dev/urandom) returned an end-of-file condition");
af8c514e5cf7 util.random: Throw different error for EOL condition Kim Alvefur <zash@zash.se> parents: 10015 diff changeset	21 end
10014 5d2f7144fa12 util.random: Handle unlikely read errors from /dev/urandom (see #1313) Kim Alvefur <zash@zash.se> parents: 8243 diff changeset	22 end
5d2f7144fa12 util.random: Handle unlikely read errors from /dev/urandom (see #1313) Kim Alvefur <zash@zash.se> parents: 8243 diff changeset	23 return data;
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	24 end
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	25
7114 51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	26 if not urandom then
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	27 function bytes()
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	28 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: 7083 diff changeset	29 end
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	30 end
51cf09bb74eb util.random: Restore friendlier error from 0.9/util.uuid Kim Alvefur <zash@zash.se> parents: 7083 diff changeset	31
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	32 return {
bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	33 bytes = bytes;
8242 177873dc9cf3 util.random: Add a _source field to match util.crand Kim Alvefur <zash@zash.se> parents: 7187 diff changeset	34 _source = "/dev/urandom";
6376 bd812a7713ad util.random: Generic util lib for generating strings of random bytes Matthew Wild <mwild1@gmail.com> parents: diff changeset	35 };

Mercurial > prosody-hg

annotate util/random.lua @ 10486:479e96e554c8