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https://github.com/element-hq/synapse
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416 lines
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416 lines
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<ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="turn-howto.html">Configuring a Turn Server</a></li><li class="chapter-item expanded "><a href="delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="upgrade.html">Upgrading between Synapse Versions</a></li><li class="chapter-item expanded "><a href="MSC1711_certificates_FAQ.html">Upgrading from pre-Synapse 1.0</a></li><li class="chapter-item expanded affix "><li class="part-title">Usage</li><li class="chapter-item expanded "><a href="federate.html">Federation</a></li><li class="chapter-item expanded "><a href="usage/configuration/index.html">Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/configuration/homeserver_sample_config.html">Homeserver Sample Config File</a></li><li class="chapter-item expanded "><a href="usage/configuration/logging_sample_config.html">Logging Sample Config File</a></li><li class="chapter-item expanded "><a href="structured_logging.html">Structured Logging</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/index.html">User Authentication</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Single-Sign On</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="openid.html">OpenID Connect</a></li><li class="chapter-item expanded "><div>SAML</div></li><li class="chapter-item expanded "><div>CAS</div></li><li class="chapter-item expanded "><a href="sso_mapping_providers.html">SSO Mapping Providers</a></li></ol></li><li class="chapter-item expanded "><a href="password_auth_providers.html">Password Auth Providers</a></li><li class="chapter-item expanded "><a href="jwt.html">JSON Web Tokens</a></li></ol></li><li class="chapter-item expanded "><a href="CAPTCHA_SETUP.html">Registration Captcha</a></li><li class="chapter-item expanded "><a href="application_services.html">Application Services</a></li><li class="chapter-item expanded "><a href="server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="consent_tracking.html" class="active">Consent Tracking</a></li><li class="chapter-item expanded "><a href="url_previews.html">URL Previews</a></li><li class="chapter-item expanded "><a href="user_directory.html">User Directory</a></li><li class="chapter-item expanded "><a href="message_retention_policies.html">Message Retention Policies</a></li><li class="chapter-item expanded "><a href="modules.html">Pluggable Modules</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Third Party Rules</div></li><li class="chapter-item expanded "><a href="spam_checker.html">Spam Checker</a></li><li class="chapter-item expanded "><a href="presence_router_module.html">Presence Router</a></li><li class="chapter-item expanded "><div>Media Storage Providers</div></li></ol></li><li class="chapter-item expanded "><a href="workers.html">Workers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="synctl_workers.html">Using synctl with Workers</a></li><li class="chapter-item expanded "><a href="systemd-with-workers/index.html">Systemd</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="usage/administration/index.html">Administration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/administration/admin_api/index.html">Admin API</a></li><li><ol class="section"><li class="chapter-item expa
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<h1 id="support-in-synapse-for-tracking-agreement-to-server-terms-and-conditions"><a class="header" href="#support-in-synapse-for-tracking-agreement-to-server-terms-and-conditions">Support in Synapse for tracking agreement to server terms and conditions</a></h1>
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<p>Synapse 0.30 introduces support for tracking whether users have agreed to the
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terms and conditions set by the administrator of a server - and blocking access
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to the server until they have.</p>
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<p>There are several parts to this functionality; each requires some specific
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configuration in <code>homeserver.yaml</code> to be enabled.</p>
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<p>Note that various parts of the configuation and this document refer to the
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"privacy policy": agreement with a privacy policy is one particular use of this
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feature, but of course adminstrators can specify other terms and conditions
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unrelated to "privacy" per se.</p>
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<h2 id="collecting-policy-agreement-from-a-user"><a class="header" href="#collecting-policy-agreement-from-a-user">Collecting policy agreement from a user</a></h2>
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<p>Synapse can be configured to serve the user a simple policy form with an
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"accept" button. Clicking "Accept" records the user's acceptance in the
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database and shows a success page.</p>
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<p>To enable this, first create templates for the policy and success pages.
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These should be stored on the local filesystem.</p>
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<p>These templates use the <a href="http://jinja.pocoo.org">Jinja2</a> templating language,
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and <a href="https://github.com/matrix-org/synapse/tree/develop/docs/privacy_policy_templates/">docs/privacy_policy_templates</a>
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gives examples of the sort of thing that can be done.</p>
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<p>Note that the templates must be stored under a name giving the language of the
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template - currently this must always be <code>en</code> (for "English");
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internationalisation support is intended for the future.</p>
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<p>The template for the policy itself should be versioned and named according to
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the version: for example <code>1.0.html</code>. The version of the policy which the user
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has agreed to is stored in the database.</p>
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<p>Once the templates are in place, make the following changes to <code>homeserver.yaml</code>:</p>
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<ol>
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<li>
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<p>Add a <code>user_consent</code> section, which should look like:</p>
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<pre><code class="language-yaml">user_consent:
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template_dir: privacy_policy_templates
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version: 1.0
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</code></pre>
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<p><code>template_dir</code> points to the directory containing the policy
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templates. <code>version</code> defines the version of the policy which will be served
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to the user. In the example above, Synapse will serve
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<code>privacy_policy_templates/en/1.0.html</code>.</p>
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</li>
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<li>
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<p>Add a <code>form_secret</code> setting at the top level:</p>
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<pre><code class="language-yaml">form_secret: "<unique secret>"
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</code></pre>
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<p>This should be set to an arbitrary secret string (try <code>pwgen -y 30</code> to
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generate suitable secrets).</p>
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<p>More on what this is used for below.</p>
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</li>
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<li>
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<p>Add <code>consent</code> wherever the <code>client</code> resource is currently enabled in the
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<code>listeners</code> configuration. For example:</p>
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<pre><code class="language-yaml">listeners:
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- port: 8008
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resources:
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- names:
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- client
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- consent
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</code></pre>
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</li>
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</ol>
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<p>Finally, ensure that <code>jinja2</code> is installed. If you are using a virtualenv, this
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should be a matter of <code>pip install Jinja2</code>. On debian, try <code>apt-get install python-jinja2</code>.</p>
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<p>Once this is complete, and the server has been restarted, try visiting
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<code>https://<server>/_matrix/consent</code>. If correctly configured, this should give
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an error "Missing string query parameter 'u'". It is now possible to manually
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construct URIs where users can give their consent.</p>
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<h3 id="enabling-consent-tracking-at-registration"><a class="header" href="#enabling-consent-tracking-at-registration">Enabling consent tracking at registration</a></h3>
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<ol>
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<li>
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<p>Add the following to your configuration:</p>
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<pre><code class="language-yaml">user_consent:
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require_at_registration: true
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policy_name: "Privacy Policy" # or whatever you'd like to call the policy
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</code></pre>
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</li>
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<li>
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<p>In your consent templates, make use of the <code>public_version</code> variable to
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see if an unauthenticated user is viewing the page. This is typically
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wrapped around the form that would be used to actually agree to the document:</p>
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<pre><code>{% if not public_version %}
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<!-- The variables used here are only provided when the 'u' param is given to the homeserver -->
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<form method="post" action="consent">
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<input type="hidden" name="v" value="{{version}}"/>
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<input type="hidden" name="u" value="{{user}}"/>
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<input type="hidden" name="h" value="{{userhmac}}"/>
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<input type="submit" value="Sure thing!"/>
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</form>
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{% endif %}
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</code></pre>
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</li>
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<li>
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<p>Restart Synapse to apply the changes.</p>
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</li>
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</ol>
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<p>Visiting <code>https://<server>/_matrix/consent</code> should now give you a view of the privacy
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document. This is what users will be able to see when registering for accounts.</p>
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<h3 id="constructing-the-consent-uri"><a class="header" href="#constructing-the-consent-uri">Constructing the consent URI</a></h3>
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<p>It may be useful to manually construct the "consent URI" for a given user - for
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instance, in order to send them an email asking them to consent. To do this,
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take the base <code>https://<server>/_matrix/consent</code> URL and add the following
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query parameters:</p>
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<ul>
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<li>
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<p><code>u</code>: the user id of the user. This can either be a full MXID
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(<code>@user:server.com</code>) or just the localpart (<code>user</code>).</p>
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</li>
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<li>
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<p><code>h</code>: hex-encoded HMAC-SHA256 of <code>u</code> using the <code>form_secret</code> as a key. It is
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possible to calculate this on the commandline with something like:</p>
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<pre><code class="language-bash">echo -n '<user>' | openssl sha256 -hmac '<form_secret>'
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</code></pre>
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<p>This should result in a URI which looks something like:
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<code>https://<server>/_matrix/consent?u=<user>&h=68a152465a4d...</code>.</p>
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</li>
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</ul>
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<p>Note that not providing a <code>u</code> parameter will be interpreted as wanting to view
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the document from an unauthenticated perspective, such as prior to registration.
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Therefore, the <code>h</code> parameter is not required in this scenario. To enable this
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behaviour, set <code>require_at_registration</code> to <code>true</code> in your <code>user_consent</code> config.</p>
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<h2 id="sending-users-a-server-notice-asking-them-to-agree-to-the-policy"><a class="header" href="#sending-users-a-server-notice-asking-them-to-agree-to-the-policy">Sending users a server notice asking them to agree to the policy</a></h2>
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<p>It is possible to configure Synapse to send a <a href="server_notices.html">server
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notice</a> to anybody who has not yet agreed to the current
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version of the policy. To do so:</p>
|
||
|
<ul>
|
||
|
<li>
|
||
|
<p>ensure that the consent resource is configured, as in the previous section</p>
|
||
|
</li>
|
||
|
<li>
|
||
|
<p>ensure that server notices are configured, as in <a href="server_notices.html">the server notice documentation</a>.</p>
|
||
|
</li>
|
||
|
<li>
|
||
|
<p>Add <code>server_notice_content</code> under <code>user_consent</code> in <code>homeserver.yaml</code>. For
|
||
|
example:</p>
|
||
|
<pre><code class="language-yaml">user_consent:
|
||
|
server_notice_content:
|
||
|
msgtype: m.text
|
||
|
body: >-
|
||
|
Please give your consent to the privacy policy at %(consent_uri)s.
|
||
|
</code></pre>
|
||
|
<p>Synapse automatically replaces the placeholder <code>%(consent_uri)s</code> with the
|
||
|
consent uri for that user.</p>
|
||
|
</li>
|
||
|
<li>
|
||
|
<p>ensure that <code>public_baseurl</code> is set in <code>homeserver.yaml</code>, and gives the base
|
||
|
URI that clients use to connect to the server. (It is used to construct
|
||
|
<code>consent_uri</code> in the server notice.)</p>
|
||
|
</li>
|
||
|
</ul>
|
||
|
<h2 id="blocking-users-from-using-the-server-until-they-agree-to-the-policy"><a class="header" href="#blocking-users-from-using-the-server-until-they-agree-to-the-policy">Blocking users from using the server until they agree to the policy</a></h2>
|
||
|
<p>Synapse can be configured to block any attempts to join rooms or send messages
|
||
|
until the user has given their agreement to the policy. (Joining the server
|
||
|
notices room is exempted from this).</p>
|
||
|
<p>To enable this, add <code>block_events_error</code> under <code>user_consent</code>. For example:</p>
|
||
|
<pre><code class="language-yaml">user_consent:
|
||
|
block_events_error: >-
|
||
|
You can't send any messages until you consent to the privacy policy at
|
||
|
%(consent_uri)s.
|
||
|
</code></pre>
|
||
|
<p>Synapse automatically replaces the placeholder <code>%(consent_uri)s</code> with the
|
||
|
consent uri for that user.</p>
|
||
|
<p>ensure that <code>public_baseurl</code> is set in <code>homeserver.yaml</code>, and gives the base
|
||
|
URI that clients use to connect to the server. (It is used to construct
|
||
|
<code>consent_uri</code> in the error.)</p>
|
||
|
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