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mod_watchuntrusted/README.markdown @ 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> |
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date | Sun, 22 Aug 2021 13:22:59 +0200 |
parent | 3220:0e78523f8c20 |
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--- labels: - 'Stage-Alpha' summary: | Warn admins about outgoing s2s connections that are refused due to invalid or untrusted certificates ... Introduction ============ Similar to mod\_watchregistrations, this module warns admins when an s2s connection fails due for encryption or trust reasons. The certificate shows the SHA1 hash, so it can easily be used together with mod\_s2s\_auth\_fingerprint. Configuration ============= modules_enabled = { -- other modules -- "watchuntrusted", } untrusted_fail_watchers = { "admin@example.lit" } untrusted_fail_notification = "Establishing a secure connection from $from_host to $to_host failed. Certificate hash: $sha1. $errors" Option Default Description ------------------------------- --------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------- untrusted\_fail\_watchers All admins The users to send the message to untrusted\_fail\_notification "Establishing a secure connection from \$from\_host to \$to\_host failed. Certificate hash: \$sha1. \$errors" The message to send, \$from\_host, \$to\_host, \$sha1 and \$errors are replaced untrusted\_message\_type `"chat"` Which kind of message to send. `"normal"` or `"headline"` are other sensible options untrusted\_ignore\_domains Empty The domains that this module should not warn about Compatibility ============= ------- ------- trunk Works ------- -------