Software / code / prosody
Changeset
8016:9546c629289b
util.id: New util for producing random identifiers of varying sizes
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Wed, 29 Mar 2017 22:38:31 +0200 |
| parents | 8014:ff3787033abb |
| children | 8017:ec7cab8e744d |
| files | util/id.lua |
| diffstat | 1 files changed, 26 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/util/id.lua Wed Mar 29 22:38:31 2017 +0200 @@ -0,0 +1,26 @@ +-- Prosody IM +-- Copyright (C) 2008-2017 Matthew Wild +-- Copyright (C) 2008-2017 Waqas Hussain +-- Copyright (C) 2008-2017 Kim Alvefur +-- +-- This project is MIT/X11 licensed. Please see the +-- COPYING file in the source package for more information. +-- + +local s_gsub = string.gsub; +local random_bytes = require "util.random".bytes; +local base64_encode = require "util.encodings".base64.encode; + +local b64url = { ["+"] = "-", ["/"] = "_", ["="] = "" }; +local function b64url_random(len) + return (s_gsub(base64_encode(random_bytes(len)), "[+/=]", b64url)); +end + +return { + short = function () return b64url_random(6); end; + medium = function () return b64url_random(12); end; + long = function () return b64url_random(24); end; + custom = function (size) + return function () return b64url_random(size); end; + end; +}
