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(Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> <i class="fa fa-search"></i> </button> </div> <h1 class="menu-title">Synapse</h1> <div class="right-buttons"> <a href="print.html" title="Print this book" aria-label="Print this book"> <i id="print-button" class="fa fa-print"></i> </a> <a href="https://github.com/matrix-org/synapse" title="Git repository" aria-label="Git repository"> <i id="git-repository-button" class="fa fa-github"></i> </a> <a href="https://github.com/matrix-org/synapse/edit/develop/docs/openid.md" title="Suggest an edit" aria-label="Suggest an edit"> <i id="git-edit-button" class="fa fa-edit"></i> </a> </div> </div> <div id="search-wrapper" class="hidden"> <form id="searchbar-outer" class="searchbar-outer"> <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> </form> <div id="searchresults-outer" class="searchresults-outer hidden"> <div id="searchresults-header" class="searchresults-header"></div> <ul id="searchresults"> </ul> </div> </div> <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> <script type="text/javascript"> document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); }); </script> <div id="content" class="content"> <main> <!-- Page table of contents --> <div class="sidetoc"> <nav class="pagetoc"></nav> </div> <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> </main> <nav class="nav-wrapper" aria-label="Page navigation"> <!-- Mobile navigation buttons --> <a rel="prev" href="usage/configuration/user_authentication/index.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> <i class="fa fa-angle-left"></i> </a> <a rel="next" href="sso_mapping_providers.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> <i class="fa fa-angle-right"></i> </a> <div style="clear: both"></div> </nav> </div> </div> <nav class="nav-wide-wrapper" aria-label="Page navigation"> <a rel="prev" href="usage/configuration/user_authentication/index.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> <i class="fa fa-angle-left"></i> </a> <a rel="next" href="sso_mapping_providers.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> <i class="fa fa-angle-right"></i> </a> </nav> </div> <script type="text/javascript"> window.playground_copyable = true; </script> <script src="elasticlunr.min.js" type="text/javascript" charset="utf-8"></script> <script src="mark.min.js" type="text/javascript" charset="utf-8"></script> <script src="searcher.js" type="text/javascript" charset="utf-8"></script> <script src="clipboard.min.js" type="text/javascript" charset="utf-8"></script> <script src="highlight.js" type="text/javascript" charset="utf-8"></script> <script src="book.js" type="text/javascript" charset="utf-8"></script> <!-- Custom JS scripts --> <script type="text/javascript" src="docs/website_files/table-of-contents.js"></script> </body> </html>