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| author | Waqas Hussain <waqas20@gmail.com> | 2009-06-04 18:04:26 +0500 |
|---|---|---|
| committer | Waqas Hussain <waqas20@gmail.com> | 2009-06-04 18:04:26 +0500 |
| commit | 4ee16e78eb4e74bd20062a19c331d70c87323712 (patch) | |
| tree | 288723a08288650d8de59c1e48efc7cb59318a25 /util/uuid.lua | |
| parent | 27379bb148766adbfda904a5d786862141060fb7 (diff) | |
| download | prosody-4ee16e78eb4e74bd20062a19c331d70c87323712.tar.gz prosody-4ee16e78eb4e74bd20062a19c331d70c87323712.zip | |
util.uuid: Now generates RFC 4122 complaint UUIDs (version 4 - random)
Diffstat (limited to 'util/uuid.lua')
| -rw-r--r-- | util/uuid.lua | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/util/uuid.lua b/util/uuid.lua index e928259d..a6dc0a1e 100644 --- a/util/uuid.lua +++ b/util/uuid.lua @@ -27,8 +27,22 @@ local function new_random(x) return sha1(x..os_clock()..tostring({}), true); end +local buffer = new_random(uniq_time()); +local function get_nibbles(n) + if #buffer < n then + buffer = new_random(buffer..uniq_time()); + end + local r = buffer:sub(0, n); + buffer = buffer:sub(n+1); + return r; +end +local function get_twobits() + return ("%x"):format(get_nibbles(1):byte() % 4 + 8); +end + function generate() - return new_random(uniq_time()); + -- 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 return _M; |