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64 lines
2.0 KiB
Markdown
64 lines
2.0 KiB
Markdown
<!--
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SPDX-FileCopyrightText: 2020 - 2024 Slavi Pantaleev
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SPDX-FileCopyrightText: 2020 Justin Croonenberghs
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SPDX-FileCopyrightText: 2022 MDAD project contributors
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SPDX-FileCopyrightText: 2024 Suguru Hirahara
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SPDX-License-Identifier: AGPL-3.0-or-later
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-->
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(Adapted from the [upstream project](https://github.com/element-hq/synapse/blob/develop/docs/CAPTCHA_SETUP.md))
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# Overview
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Captcha can be enabled for this home server. This file explains how to do that.
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The captcha mechanism used is Google's [ReCaptcha](https://www.google.com/recaptcha/). This requires API keys from Google. If your homeserver is Dendrite then [hCapcha](https://www.hcaptcha.com) can be used instead.
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## ReCaptcha
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### Getting keys
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Requires a site/secret key pair from:
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<http://www.google.com/recaptcha/admin>
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Must be a reCAPTCHA **v2** key using the "I'm not a robot" Checkbox option
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### Setting ReCaptcha keys
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Once registered as above, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
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```yaml
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# for Synapse
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matrix_synapse_enable_registration_captcha: true
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matrix_synapse_recaptcha_public_key: 'YOUR_SITE_KEY'
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matrix_synapse_recaptcha_private_key: 'YOUR_SECRET_KEY'
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# for Dendrite
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matrix_dendrite_client_api_enable_registration_captcha: true
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matrix_dendrite_client_api_recaptcha_public_key: 'YOUR_SITE_KEY'
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matrix_dendrite_client_api_recaptcha_private_key: 'YOUR_SECRET_KEY'
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```
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## hCaptcha
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### Getting keys
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Requires a site/secret key pair from:
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<https://dashboard.hcaptcha.com/sites/new>
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### Setting hCaptcha keys
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```yaml
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matrix_dendrite_client_api_enable_registration_captcha: true
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matrix_dendrite_client_api_recaptcha_public_key: 'YOUR_SITE_KEY'
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matrix_dendrite_client_api_recaptcha_private_key: 'YOUR_SECRET_KEY'
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matrix_dendrite_client_api_recaptcha_siteverify_api: 'https://hcaptcha.com/siteverify'
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matrix_dendrite_client_api_recaptcha_api_js_url: 'https://js.hcaptcha.com/1/api.js'
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matrix_dendrite_client_api_recaptcha_form_field: 'h-captcha-response'
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matrix_dendrite_client_api_recaptcha_sitekey_class: 'h-captcha'
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```
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