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- <h1 id="configuring-synapse-to-authenticate-against-an-openid-connect-provider"><a class="header" href="#configuring-synapse-to-authenticate-against-an-openid-connect-provider">Configuring Synapse to authenticate against an OpenID Connect provider</a></h1>
-<p>Synapse can be configured to use an OpenID Connect Provider (OP) for
-authentication, instead of its own local password database.</p>
-<p>Any OP should work with Synapse, as long as it supports the authorization code
-flow. There are a few options for that:</p>
-<ul>
-<li>
-<p>start a local OP. Synapse has been tested with <a href="https://www.ory.sh/docs/hydra/">Hydra</a> and
-<a href="https://github.com/dexidp/dex">Dex</a>. Note that for an OP to work, it should be served under a
-secure (HTTPS) origin. A certificate signed with a self-signed, locally
-trusted CA should work. In that case, start Synapse with a <code>SSL_CERT_FILE</code>
-environment variable set to the path of the CA.</p>
-</li>
-<li>
-<p>set up a SaaS OP, like <a href="https://developers.google.com/identity/protocols/oauth2/openid-connect">Google</a>, <a href="https://auth0.com/">Auth0</a> or
-<a href="https://www.okta.com/">Okta</a>. Synapse has been tested with Auth0 and Google.</p>
-</li>
-</ul>
-<p>It may also be possible to use other OAuth2 providers which provide the
-<a href="https://tools.ietf.org/html/rfc6749#section-4.1">authorization code grant type</a>,
-such as <a href="https://developer.github.com/apps/building-oauth-apps/authorizing-oauth-apps">Github</a>.</p>
-<h2 id="preparing-synapse"><a class="header" href="#preparing-synapse">Preparing Synapse</a></h2>
-<p>The OpenID integration in Synapse uses the
-<a href="https://pypi.org/project/Authlib/"><code>authlib</code></a> library, which must be installed
-as follows:</p>
-<ul>
-<li>
-<p>The relevant libraries are included in the Docker images and Debian packages
-provided by <code>matrix.org</code> so no further action is needed.</p>
-</li>
-<li>
-<p>If you installed Synapse into a virtualenv, run <code>/path/to/env/bin/pip install matrix-synapse[oidc]</code> to install the necessary dependencies.</p>
-</li>
-<li>
-<p>For other installation mechanisms, see the documentation provided by the
-maintainer.</p>
-</li>
-</ul>
-<p>To enable the OpenID integration, you should then add a section to the <code>oidc_providers</code>
-setting in your configuration file (or uncomment one of the existing examples).
-See <a href="./sample_config.yaml">sample_config.yaml</a> for some sample settings, as well as
-the text below for example configurations for specific providers.</p>
-<h2 id="sample-configs"><a class="header" href="#sample-configs">Sample configs</a></h2>
-<p>Here are a few configs for providers that should work with Synapse.</p>
-<h3 id="microsoft-azure-active-directory"><a class="header" href="#microsoft-azure-active-directory">Microsoft Azure Active Directory</a></h3>
-<p>Azure AD can act as an OpenID Connect Provider. Register a new application under
-<em>App registrations</em> in the Azure AD management console. The RedirectURI for your
-application should point to your matrix server:
-<code>[synapse public baseurl]/_synapse/client/oidc/callback</code></p>
-<p>Go to <em>Certificates & secrets</em> and register a new client secret. Make note of your
-Directory (tenant) ID as it will be used in the Azure links.
-Edit your Synapse config file and change the <code>oidc_config</code> section:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: microsoft
- idp_name: Microsoft
- issuer: "https://login.microsoftonline.com/<tenant id>/v2.0"
- client_id: "<client id>"
- client_secret: "<client secret>"
- scopes: ["openid", "profile"]
- authorization_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/authorize"
- token_endpoint: "https://login.microsoftonline.com/<tenant id>/oauth2/v2.0/token"
- userinfo_endpoint: "https://graph.microsoft.com/oidc/userinfo"
-
- user_mapping_provider:
- config:
- localpart_template: "{{ user.preferred_username.split('@')[0] }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="dex"><a class="header" href="#dex">Dex</a></h3>
-<p><a href="https://github.com/dexidp/dex">Dex</a> is a simple, open-source, certified OpenID Connect Provider.
-Although it is designed to help building a full-blown provider with an
-external database, it can be configured with static passwords in a config file.</p>
-<p>Follow the <a href="https://dexidp.io/docs/getting-started/">Getting Started guide</a>
-to install Dex.</p>
-<p>Edit <code>examples/config-dev.yaml</code> config file from the Dex repo to add a client:</p>
-<pre><code class="language-yaml">staticClients:
-- id: synapse
- secret: secret
- redirectURIs:
- - '[synapse public baseurl]/_synapse/client/oidc/callback'
- name: 'Synapse'
-</code></pre>
-<p>Run with <code>dex serve examples/config-dev.yaml</code>.</p>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: dex
- idp_name: "My Dex server"
- skip_verification: true # This is needed as Dex is served on an insecure endpoint
- issuer: "http://127.0.0.1:5556/dex"
- client_id: "synapse"
- client_secret: "secret"
- scopes: ["openid", "profile"]
- user_mapping_provider:
- config:
- localpart_template: "{{ user.name }}"
- display_name_template: "{{ user.name|capitalize }}"
-</code></pre>
-<h3 id="keycloak"><a class="header" href="#keycloak">Keycloak</a></h3>
-<p><a href="https://www.keycloak.org/docs/latest/server_admin/#sso-protocols">Keycloak</a> is an opensource IdP maintained by Red Hat.</p>
-<p>Follow the <a href="https://www.keycloak.org/getting-started">Getting Started Guide</a> to install Keycloak and set up a realm.</p>
-<ol>
-<li>
-<p>Click <code>Clients</code> in the sidebar and click <code>Create</code></p>
-</li>
-<li>
-<p>Fill in the fields as below:</p>
-</li>
-</ol>
-<table><thead><tr><th>Field</th><th>Value</th></tr></thead><tbody>
-<tr><td>Client ID</td><td><code>synapse</code></td></tr>
-<tr><td>Client Protocol</td><td><code>openid-connect</code></td></tr>
-</tbody></table>
-<ol start="3">
-<li>Click <code>Save</code></li>
-<li>Fill in the fields as below:</li>
-</ol>
-<table><thead><tr><th>Field</th><th>Value</th></tr></thead><tbody>
-<tr><td>Client ID</td><td><code>synapse</code></td></tr>
-<tr><td>Enabled</td><td><code>On</code></td></tr>
-<tr><td>Client Protocol</td><td><code>openid-connect</code></td></tr>
-<tr><td>Access Type</td><td><code>confidential</code></td></tr>
-<tr><td>Valid Redirect URIs</td><td><code>[synapse public baseurl]/_synapse/client/oidc/callback</code></td></tr>
-</tbody></table>
-<ol start="5">
-<li>Click <code>Save</code></li>
-<li>On the Credentials tab, update the fields:</li>
-</ol>
-<table><thead><tr><th>Field</th><th>Value</th></tr></thead><tbody>
-<tr><td>Client Authenticator</td><td><code>Client ID and Secret</code></td></tr>
-</tbody></table>
-<ol start="7">
-<li>Click <code>Regenerate Secret</code></li>
-<li>Copy Secret</li>
-</ol>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: keycloak
- idp_name: "My KeyCloak server"
- issuer: "https://127.0.0.1:8443/auth/realms/{realm_name}"
- client_id: "synapse"
- client_secret: "copy secret generated from above"
- scopes: ["openid", "profile"]
- user_mapping_provider:
- config:
- localpart_template: "{{ user.preferred_username }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="auth0"><a class="header" href="#auth0">Auth0</a></h3>
-<p><a href="https://auth0.com/">Auth0</a> is a hosted SaaS IdP solution.</p>
-<ol>
-<li>
-<p>Create a regular web application for Synapse</p>
-</li>
-<li>
-<p>Set the Allowed Callback URLs to <code>[synapse public baseurl]/_synapse/client/oidc/callback</code></p>
-</li>
-<li>
-<p>Add a rule to add the <code>preferred_username</code> claim.</p>
-<details>
- <summary>Code sample</summary>
-<pre><code class="language-js">function addPersistenceAttribute(user, context, callback) {
- user.user_metadata = user.user_metadata || {};
- user.user_metadata.preferred_username = user.user_metadata.preferred_username || user.user_id;
- context.idToken.preferred_username = user.user_metadata.preferred_username;
-
- auth0.users.updateUserMetadata(user.user_id, user.user_metadata)
- .then(function(){
- callback(null, user, context);
- })
- .catch(function(err){
- callback(err);
- });
-}
-</code></pre>
-</li>
-</ol>
-</details>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: auth0
- idp_name: Auth0
- issuer: "https://your-tier.eu.auth0.com/" # TO BE FILLED
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- scopes: ["openid", "profile"]
- user_mapping_provider:
- config:
- localpart_template: "{{ user.preferred_username }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="github"><a class="header" href="#github">GitHub</a></h3>
-<p><a href="https://developer.github.com/apps/building-oauth-apps/authorizing-oauth-apps">GitHub</a> is a bit special as it is not an OpenID Connect compliant provider, but
-just a regular OAuth2 provider.</p>
-<p>The <a href="https://developer.github.com/v3/users/#get-the-authenticated-user"><code>/user</code> API endpoint</a>
-can be used to retrieve information on the authenticated user. As the Synapse
-login mechanism needs an attribute to uniquely identify users, and that endpoint
-does not return a <code>sub</code> property, an alternative <code>subject_claim</code> has to be set.</p>
-<ol>
-<li>Create a new OAuth application: https://github.com/settings/applications/new.</li>
-<li>Set the callback URL to <code>[synapse public baseurl]/_synapse/client/oidc/callback</code>.</li>
-</ol>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: github
- idp_name: Github
- idp_brand: "github" # optional: styling hint for clients
- discover: false
- issuer: "https://github.com/"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- authorization_endpoint: "https://github.com/login/oauth/authorize"
- token_endpoint: "https://github.com/login/oauth/access_token"
- userinfo_endpoint: "https://api.github.com/user"
- scopes: ["read:user"]
- user_mapping_provider:
- config:
- subject_claim: "id"
- localpart_template: "{{ user.login }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="google"><a class="header" href="#google">Google</a></h3>
-<p><a href="https://developers.google.com/identity/protocols/oauth2/openid-connect">Google</a> is an OpenID certified authentication and authorisation provider.</p>
-<ol>
-<li>Set up a project in the Google API Console (see
-https://developers.google.com/identity/protocols/oauth2/openid-connect#appsetup).</li>
-<li>Add an "OAuth Client ID" for a Web Application under "Credentials".</li>
-<li>Copy the Client ID and Client Secret, and add the following to your synapse config:
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: google
- idp_name: Google
- idp_brand: "google" # optional: styling hint for clients
- issuer: "https://accounts.google.com/"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- scopes: ["openid", "profile"]
- user_mapping_provider:
- config:
- localpart_template: "{{ user.given_name|lower }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-</li>
-<li>Back in the Google console, add this Authorized redirect URI: <code>[synapse public baseurl]/_synapse/client/oidc/callback</code>.</li>
-</ol>
-<h3 id="twitch"><a class="header" href="#twitch">Twitch</a></h3>
-<ol>
-<li>Setup a developer account on <a href="https://dev.twitch.tv/">Twitch</a></li>
-<li>Obtain the OAuth 2.0 credentials by <a href="https://dev.twitch.tv/console/apps/">creating an app</a></li>
-<li>Add this OAuth Redirect URL: <code>[synapse public baseurl]/_synapse/client/oidc/callback</code></li>
-</ol>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: twitch
- idp_name: Twitch
- issuer: "https://id.twitch.tv/oauth2/"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- client_auth_method: "client_secret_post"
- user_mapping_provider:
- config:
- localpart_template: "{{ user.preferred_username }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="gitlab"><a class="header" href="#gitlab">GitLab</a></h3>
-<ol>
-<li>Create a <a href="https://gitlab.com/profile/applications">new application</a>.</li>
-<li>Add the <code>read_user</code> and <code>openid</code> scopes.</li>
-<li>Add this Callback URL: <code>[synapse public baseurl]/_synapse/client/oidc/callback</code></li>
-</ol>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: gitlab
- idp_name: Gitlab
- idp_brand: "gitlab" # optional: styling hint for clients
- issuer: "https://gitlab.com/"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- client_auth_method: "client_secret_post"
- scopes: ["openid", "read_user"]
- user_profile_method: "userinfo_endpoint"
- user_mapping_provider:
- config:
- localpart_template: '{{ user.nickname }}'
- display_name_template: '{{ user.name }}'
-</code></pre>
-<h3 id="facebook"><a class="header" href="#facebook">Facebook</a></h3>
-<p>Like Github, Facebook provide a custom OAuth2 API rather than an OIDC-compliant
-one so requires a little more configuration.</p>
-<ol start="0">
-<li>You will need a Facebook developer account. You can register for one
-<a href="https://developers.facebook.com/async/registration/">here</a>.</li>
-<li>On the <a href="https://developers.facebook.com/apps/">apps</a> page of the developer
-console, "Create App", and choose "Build Connected Experiences".</li>
-<li>Once the app is created, add "Facebook Login" and choose "Web". You don't
-need to go through the whole form here.</li>
-<li>In the left-hand menu, open "Products"/"Facebook Login"/"Settings".
-<ul>
-<li>Add <code>[synapse public baseurl]/_synapse/client/oidc/callback</code> as an OAuth Redirect
-URL.</li>
-</ul>
-</li>
-<li>In the left-hand menu, open "Settings/Basic". Here you can copy the "App ID"
-and "App Secret" for use below.</li>
-</ol>
-<p>Synapse config:</p>
-<pre><code class="language-yaml"> - idp_id: facebook
- idp_name: Facebook
- idp_brand: "facebook" # optional: styling hint for clients
- discover: false
- issuer: "https://facebook.com"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- scopes: ["openid", "email"]
- authorization_endpoint: https://facebook.com/dialog/oauth
- token_endpoint: https://graph.facebook.com/v9.0/oauth/access_token
- user_profile_method: "userinfo_endpoint"
- userinfo_endpoint: "https://graph.facebook.com/v9.0/me?fields=id,name,email,picture"
- user_mapping_provider:
- config:
- subject_claim: "id"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<p>Relevant documents:</p>
-<ul>
-<li>https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow</li>
-<li>Using Facebook's Graph API: https://developers.facebook.com/docs/graph-api/using-graph-api/</li>
-<li>Reference to the User endpoint: https://developers.facebook.com/docs/graph-api/reference/user</li>
-</ul>
-<h3 id="gitea"><a class="header" href="#gitea">Gitea</a></h3>
-<p>Gitea is, like Github, not an OpenID provider, but just an OAuth2 provider.</p>
-<p>The <a href="https://try.gitea.io/api/swagger#/user/userGetCurrent"><code>/user</code> API endpoint</a>
-can be used to retrieve information on the authenticated user. As the Synapse
-login mechanism needs an attribute to uniquely identify users, and that endpoint
-does not return a <code>sub</code> property, an alternative <code>subject_claim</code> has to be set.</p>
-<ol>
-<li>Create a new application.</li>
-<li>Add this Callback URL: <code>[synapse public baseurl]/_synapse/client/oidc/callback</code></li>
-</ol>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: gitea
- idp_name: Gitea
- discover: false
- issuer: "https://your-gitea.com/"
- client_id: "your-client-id" # TO BE FILLED
- client_secret: "your-client-secret" # TO BE FILLED
- client_auth_method: client_secret_post
- scopes: [] # Gitea doesn't support Scopes
- authorization_endpoint: "https://your-gitea.com/login/oauth/authorize"
- token_endpoint: "https://your-gitea.com/login/oauth/access_token"
- userinfo_endpoint: "https://your-gitea.com/api/v1/user"
- user_mapping_provider:
- config:
- subject_claim: "id"
- localpart_template: "{{ user.login }}"
- display_name_template: "{{ user.full_name }}"
-</code></pre>
-<h3 id="xwiki"><a class="header" href="#xwiki">XWiki</a></h3>
-<p>Install <a href="https://extensions.xwiki.org/xwiki/bin/view/Extension/OpenID%20Connect/OpenID%20Connect%20Provider/">OpenID Connect Provider</a> extension in your <a href="https://www.xwiki.org">XWiki</a> instance.</p>
-<p>Synapse config:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: xwiki
- idp_name: "XWiki"
- issuer: "https://myxwikihost/xwiki/oidc/"
- client_id: "your-client-id" # TO BE FILLED
- client_auth_method: none
- scopes: ["openid", "profile"]
- user_profile_method: "userinfo_endpoint"
- user_mapping_provider:
- config:
- localpart_template: "{{ user.preferred_username }}"
- display_name_template: "{{ user.name }}"
-</code></pre>
-<h3 id="apple"><a class="header" href="#apple">Apple</a></h3>
-<p>Configuring "Sign in with Apple" (SiWA) requires an Apple Developer account.</p>
-<p>You will need to create a new "Services ID" for SiWA, and create and download a
-private key with "SiWA" enabled.</p>
-<p>As well as the private key file, you will need:</p>
-<ul>
-<li>Client ID: the "identifier" you gave the "Services ID"</li>
-<li>Team ID: a 10-character ID associated with your developer account.</li>
-<li>Key ID: the 10-character identifier for the key.</li>
-</ul>
-<p>https://help.apple.com/developer-account/?lang=en#/dev77c875b7e has more
-documentation on setting up SiWA.</p>
-<p>The synapse config will look like this:</p>
-<pre><code class="language-yaml"> - idp_id: apple
- idp_name: Apple
- issuer: "https://appleid.apple.com"
- client_id: "your-client-id" # Set to the "identifier" for your "ServicesID"
- client_auth_method: "client_secret_post"
- client_secret_jwt_key:
- key_file: "/path/to/AuthKey_KEYIDCODE.p8" # point to your key file
- jwt_header:
- alg: ES256
- kid: "KEYIDCODE" # Set to the 10-char Key ID
- jwt_payload:
- iss: TEAMIDCODE # Set to the 10-char Team ID
- scopes: ["name", "email", "openid"]
- authorization_endpoint: https://appleid.apple.com/auth/authorize?response_mode=form_post
- user_mapping_provider:
- config:
- email_template: "{{ user.email }}"
-</code></pre>
-<h2 id="django-oauth-toolkit"><a class="header" href="#django-oauth-toolkit">Django OAuth Toolkit</a></h2>
-<p><a href="https://github.com/jazzband/django-oauth-toolkit">django-oauth-toolkit</a> is a
-Django application providing out of the box all the endpoints, data and logic
-needed to add OAuth2 capabilities to your Django projects. It supports
-<a href="https://django-oauth-toolkit.readthedocs.io/en/latest/oidc.html">OpenID Connect too</a>.</p>
-<p>Configuration on Django's side:</p>
-<ol>
-<li>Add an application: https://example.com/admin/oauth2_provider/application/add/ and choose parameters like this:</li>
-</ol>
-<ul>
-<li><code>Redirect uris</code>: https://synapse.example.com/_synapse/client/oidc/callback</li>
-<li><code>Client type</code>: <code>Confidential</code></li>
-<li><code>Authorization grant type</code>: <code>Authorization code</code></li>
-<li><code>Algorithm</code>: <code>HMAC with SHA-2 256</code></li>
-</ul>
-<ol start="2">
-<li>
-<p>You can <a href="https://django-oauth-toolkit.readthedocs.io/en/latest/oidc.html#customizing-the-oidc-responses">customize the claims</a> Django gives to synapse (optional):</p>
-<details>
- <summary>Code sample</summary>
-<pre><code class="language-python">class CustomOAuth2Validator(OAuth2Validator):
-
- def get_additional_claims(self, request):
- return {
- "sub": request.user.email,
- "email": request.user.email,
- "first_name": request.user.first_name,
- "last_name": request.user.last_name,
- }
-</code></pre>
-</details>
-</li>
-</ol>
-<p>Your synapse config is then:</p>
-<pre><code class="language-yaml">oidc_providers:
- - idp_id: django_example
- idp_name: "Django Example"
- issuer: "https://example.com/o/"
- client_id: "your-client-id" # CHANGE ME
- client_secret: "your-client-secret" # CHANGE ME
- scopes: ["openid"]
- user_profile_method: "userinfo_endpoint" # needed because oauth-toolkit does not include user information in the authorization response
- user_mapping_provider:
- config:
- localpart_template: "{{ user.email.split('@')[0] }}"
- display_name_template: "{{ user.first_name }} {{ user.last_name }}"
- email_template: "{{ user.email }}"
-</code></pre>
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