diff options
Diffstat (limited to 'util/uuid.lua')
| -rw-r--r-- | util/uuid.lua | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/util/uuid.lua b/util/uuid.lua index 3576be8f..f4fd21f6 100644 --- a/util/uuid.lua +++ b/util/uuid.lua @@ -1,36 +1,32 @@ -- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain --- +-- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- -local error = error; -local round_up = math.ceil; -local urandom, urandom_err = io.open("/dev/urandom", "r"); - -module "uuid" +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) - local binary_random = urandom:read(round_up(n/2)); - local hex_random = binary_random:gsub(".", - function (x) return ("%02x"):format(x:byte()) end); - return hex_random:sub(1, n); + return hex(random_bytes(m_ceil(n/2))):sub(1, n); end + local function get_twobits() - return ("%x"):format(urandom:read(1):byte() % 4 + 8); + return ("%x"):format(random_bytes(1):byte() % 4 + 8); end -function generate() - if not urandom then - error("Unable to obtain a secure random number generator, please see https://prosody.im/doc/random ("..urandom_err..")"); - end +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 -function seed() -end - -return _M; +return { + get_nibbles=get_nibbles; + generate = generate ; + -- COMPAT + seed = random.seed; +}; |