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util.session: What is the identity of a session?
[prosody.git]
/
util
/
uuid.lua
diff --git
a/util/uuid.lua
b/util/uuid.lua
index fd21dfcc40e08b04de1fb4f6bffd62ff587dd71f..e10fc0f72290a996c09560632e4c94603dff74fb 100644
(file)
--- a/
util/uuid.lua
+++ b/
util/uuid.lua
@@
-1,19
+1,32
@@
--- Prosody IM
v0.4
--- Copyright (C) 2008-20
09
Matthew Wild
--- Copyright (C) 2008-20
09
Waqas Hussain
---
+-- Prosody IM
+-- Copyright (C) 2008-20
10
Matthew Wild
+-- Copyright (C) 2008-20
10
Waqas Hussain
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
+local random = require "util.random";
+local random_bytes = random.bytes;
+local hex = require "util.hex".to;
+local m_ceil = math.ceil;
+local function get_nibbles(n)
+ return hex(random_bytes(m_ceil(n/2))):sub(1, n);
+end
-local
m_random = math.random;
-
local tostring = tostring
;
-module "uuid"
+local
function get_twobits()
+
return ("%x"):format(get_nibbles(1):byte() % 4 + 8)
;
+end
-function generate()
- return tostring(m_random(0, 99999999));
+local function generate()
+ -- generate RFC 4122 complaint UUIDs (version 4 - random)
+ return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
end
end
-return _M;
\ No newline at end of file
+return {
+ get_nibbles=get_nibbles;
+ generate = generate ;
+ -- COMPAT
+ seed = random.seed;
+};