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util/hex.lua @ 12088:e5028f6eb599 0.11
mod_pep: Prevent creation of services for non-existent users
Using a dedicated service should give identical behavior, except for a
possible timing difference in the user existence lookup.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 04 Nov 2021 00:55:59 +0100 |
parent | 6802:442019e955dc |
child | 12355:a0ff5c438e9d |
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local s_char = string.char; local s_format = string.format; local s_gsub = string.gsub; local s_lower = string.lower; local char_to_hex = {}; local hex_to_char = {}; do local char, hex; for i = 0,255 do char, hex = s_char(i), s_format("%02x", i); char_to_hex[char] = hex; hex_to_char[hex] = char; end end local function to(s) return (s_gsub(s, ".", char_to_hex)); end local function from(s) return (s_gsub(s_lower(s), "%X*(%x%x)%X*", hex_to_char)); end return { to = to, from = from }