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-rw-r--r--util/hex.lua19
-rw-r--r--util/random.lua43
-rw-r--r--util/uuid.lua44
3 files changed, 75 insertions, 31 deletions
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 }
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;
+};
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;
+};