Mercurial > prosody-modules
view mod_http_auth_check/mod_http_auth_check.lua @ 4651:8231774f5bfd
mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8
The `body:sub()` call risks splitting the string in the middle of a
multi-byte UTF-8 sequence. This should have been caught by util.stanza
validation, but that would have caused some havoc, at the very least causing
the notification to not be sent.
There have been no reports of this happening. Likely because this module
isn't widely deployed among users with languages that use many longer UTF-8
sequences.
The util.encodings.utf8.valid() function is O(n) where only the last
sequence really needs to be checked, but it's in C and expected to be fast.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 22 Aug 2021 13:22:59 +0200 |
parents | 5ca6d53d3186 |
children |
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-- HTTP Is User Valid -- By Nicolas Cedilnik <nicoco@nicoco.fr> local jid_prep = require "util.jid".prep; local jid_split = require "util.jid".split; local test_password = require "core.usermanager".test_password; local b64_decode = require "util.encodings".base64.decode; local saslprep = require "util.encodings".stringprep.saslprep; local realm = module:get_host() .. "/" .. module:get_name(); module:depends"http"; local function authenticate (event, path) local request = event.request; local response = event.response; local headers = request.headers; if not headers.authorization then response.headers.www_authenticate = ("Basic realm=%q"):format(realm); return 401 end local from_jid, password = b64_decode(headers.authorization:match"[^ ]*$"):match"([^:]*):(.*)"; from_jid = jid_prep(from_jid); password = saslprep(password); if from_jid and password then local user, host = jid_split(from_jid); local ok, err = test_password(user, host, password); if ok and user and host then return 200 elseif err then return 401 end end end module:provides("http", { route = { GET = authenticate }; });