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annotate mod_captcha_registration/README.markdown @ 4651:8231774f5bfd

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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
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children
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1 ---
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2 labels:
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3 - 'Stage-Beta'
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4 summary: provides captcha protection for registration form
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5 ...
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7 Introduction
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8 ============
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9
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10 Prosody-captcha is a little modification of prosody's
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11 "mod\_register.lua" module that provides captcha protection for
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12 registration form.
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14 Installation
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15 ============
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16
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17 First of all you should build and install lua bindings for libgd —
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18 [lua-gd](https://github.com/ittner/lua-gd/).
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19
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20 Then clone repsository lua-captcha:
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21
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22 $ git clone https://github.com/mrDoctorWho/lua-captcha
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24 install it:
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26 $ make install
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28 Configuration
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29 =============
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31 After that you would configure prosody. This module requires from you 4
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32 fields, you should add this into your VirtualHost entry.
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34 captcha_config = {
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35 dir = "/tmp"; -- Directory used to storage captcha images. Please make sure prosody user allowed to write there.
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36 timeout = 60; -- Timeout when captcha will expire
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37 web_path = "challenge"; -- Web path used to separate main prosody site from itself modules.
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38 font = "/usr/lib/prosody/FiraSans-Regular.ttf" -- Font used for captcha text
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39 }
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41 You can run script "install.lua" to install this or instead of that
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42 while prosody developers didn't accepted "dataforms" changes you should
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43 replace standard prosody "dataforms.lua" located in ubuntu in
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44 /usr/lib/prosody/util by another one from this repository. You should do
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45 the same thing with "mod\_register.lua" located in ubuntu in
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46 /usr/lib/prosody/modules.
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48 After this all you can try to register on your server and see the
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49 captcha.
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51 TODO
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52 ====
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53
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54 - Maybe use recaptcha instead of libgd.