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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 ea6b5321db50
children
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---
summary: Log certificate status and fingerprint of remote servers
...

Introduction
============

This module produces info level log messages with the certificate status
and fingerprint every time an s2s connection is established. It can also
optionally store this in persistent storage.

**info** jabber.org has a trusted valid certificate with SHA1:
11:C2:3D:87:3F:95:F8:13:F8:CA:81:33:71:36:A7:00:E0:01:95:ED

Fingerprints could then be added to
[mod\_s2s\_auth\_fingerprint](mod_s2s_auth_fingerprint.html).

Configuration
=============

Add the module to the `modules_enabled` list.

    modules_enabled = {
        ...
        "s2s_log_certs";
    }

If you want to keep track of how many times, and when a certificate is
seen add

`s2s_log_certs_persist = true`

Compatibility
=============

  ------- --------------
  trunk   Works
  0.10    Works
  0.9     Works
  0.8     Doesn't work
  ------- --------------