From 56b4c1c856f107e178aede2313d943022ad3c73d Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Tue, 2 Sep 2014 17:56:42 +0100
Subject: util.hex: Small util lib for converting to/from hex strings

---
 util/hex.lua | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 util/hex.lua

(limited to 'util')

diff --git a/util/hex.lua b/util/hex.lua
new file mode 100644
index 00000000..72fc22bd
--- /dev/null
+++ b/util/hex.lua
@@ -0,0 +1,19 @@
+local s_char = string.char;
+
+local function char_to_hex(c)
+	return ("%02x"):format(c:byte())
+end
+
+local function hex_to_char(h)
+	return s_char(tonumber(h, 16));
+end
+
+function to(s)
+	return s:gsub(".", char_to_hex);
+end
+
+function from(s)
+	return s:gsub("..", hex_to_char);
+end
+
+return { to = to, from = from }
-- 
cgit v1.2.3


From 2716c4191dfe01af0f75dc7d4642f3a0e1494b31 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Tue, 2 Sep 2014 17:57:18 +0100
Subject: util.random: Generic util lib for generating strings of random bytes

---
 util/random.lua | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 util/random.lua

(limited to 'util')

diff --git a/util/random.lua b/util/random.lua
new file mode 100644
index 00000000..ed5cdf4b
--- /dev/null
+++ b/util/random.lua
@@ -0,0 +1,43 @@
+-- Prosody IM
+-- Copyright (C) 2008-2014 Matthew Wild
+-- Copyright (C) 2008-2014 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local tostring = tostring;
+local os_time = os.time;
+local os_clock = os.clock;
+local ceil = math.ceil;
+local sha1 = require "util.hashes".sha1;
+
+local last_uniq_time = 0;
+local function uniq_time()
+	local new_uniq_time = os_time();
+	if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end
+	last_uniq_time = new_uniq_time;
+	return new_uniq_time;
+end
+
+local function new_random(x)
+	return sha1(x..os_clock()..tostring({}));
+end
+
+local buffer = new_random(uniq_time());
+
+local function seed(x)
+	buffer = new_random(buffer..x);
+end
+
+local function bytes(n)
+	if #buffer < n then seed(uniq_time()); end
+	local r = buffer:sub(0, n);
+	buffer = buffer:sub(n+1);
+	return r;
+end
+
+return {
+	seed = seed;
+	bytes = bytes;
+};
-- 
cgit v1.2.3


From a540fdb9f448eb0990899b70e0ed8ab926e979f6 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Tue, 2 Sep 2014 17:58:12 +0100
Subject: util.uuid: Use util.hex and util.random

---
 util/uuid.lua | 44 +++++++++++++-------------------------------
 1 file changed, 13 insertions(+), 31 deletions(-)

(limited to 'util')

diff --git a/util/uuid.lua b/util/uuid.lua
index fc487c72..e10fc0f7 100644
--- a/util/uuid.lua
+++ b/util/uuid.lua
@@ -6,45 +6,27 @@
 -- 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 m_random = math.random;
-local tostring = tostring;
-local os_time = os.time;
-local os_clock = os.clock;
-local sha1 = require "util.hashes".sha1;
-
-module "uuid"
-
-local last_uniq_time = 0;
-local function uniq_time()
-	local new_uniq_time = os_time();
-	if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end
-	last_uniq_time = new_uniq_time;
-	return new_uniq_time;
-end
-
-local function new_random(x)
-	return sha1(x..os_clock()..tostring({}), true);
-end
-
-local buffer = new_random(uniq_time());
-local function _seed(x)
-	buffer = new_random(buffer..x);
-end
 local function get_nibbles(n)
-	if #buffer < n then _seed(uniq_time()); end
-	local r = buffer:sub(0, n);
-	buffer = buffer:sub(n+1);
-	return r;
+	return hex(random_bytes(m_ceil(n/2))):sub(1, n);
 end
+
 local function get_twobits()
 	return ("%x"):format(get_nibbles(1):byte() % 4 + 8);
 end
 
-function generate()
+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
-seed = _seed;
 
-return _M;
+return {
+	get_nibbles=get_nibbles;
+	generate = generate ;
+	-- COMPAT
+	seed = random.seed;
+};
-- 
cgit v1.2.3