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comparison util/id.lua @ 12111:f8d280215633

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util.id: Add a 'tiny' variant Conversations uses this for its randomized resources. Presumably fine and collision resistant enough when you have a few devices at most.
author Kim Alvefur <zash@zash.se>
date Thu, 02 Dec 2021 00:13:23 +0100
parents b5b799a2a10c
children d10957394a3c
comparison
equal deleted inserted replaced
12110:b5b799a2a10c 12111:f8d280215633
17 end 17 end
18 18
19 return { 19 return {
20 -- sizes divisible by 3 fit nicely into base64 without padding== 20 -- sizes divisible by 3 fit nicely into base64 without padding==
21 21
22 -- for short lived things with low risk of collisions
23 tiny = function() return b64url_random(3); end;
24
22 -- close to 8 bytes, should be good enough for relatively short lived or uses 25 -- close to 8 bytes, should be good enough for relatively short lived or uses
23 -- scoped by host or users, half the size of an uuid 26 -- scoped by host or users, half the size of an uuid
24 short = function() return b64url_random(9); end; 27 short = function() return b64url_random(9); end;
25 28
26 -- more entropy than uuid at 2/3 the size 29 -- more entropy than uuid at 2/3 the size