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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/modules/password_auth_provider_callbacks.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="password-auth-provider-callbacks"><a class="header" href="#password-auth-provider-callbacks">Password auth provider callbacks</a></h1> <p>Password auth providers offer a way for server administrators to integrate their Synapse installation with an external authentication system. The callbacks can be registered by using the Module API's <code>register_password_auth_provider_callbacks</code> method.</p> <h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2> <h3 id="auth_checkers"><a class="header" href="#auth_checkers"><code>auth_checkers</code></a></h3> <p><em>First introduced in Synapse v1.46.0</em></p> <pre><code class="language-python">auth_checkers: Dict[Tuple[str, Tuple[str, ...]], Callable] </code></pre> <p>A dict mapping from tuples of a login type identifier (such as <code>m.login.password</code>) and a tuple of field names (such as <code>("password", "secret_thing")</code>) to authentication checking callbacks, which should be of the following form:</p> <pre><code class="language-python">async def check_auth( user: str, login_type: str, login_dict: "synapse.module_api.JsonDict", ) -> Optional[ Tuple[ str, Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]] ] ] </code></pre> <p>The login type and field names should be provided by the user in the request to the <code>/login</code> API. <a href="https://matrix.org/docs/spec/client_server/latest#authentication-types">The Matrix specification</a> defines some types, however user defined ones are also allowed.</p> <p>The callback is passed the <code>user</code> field provided by the client (which might not be in <code>@username:server</code> form), the login type, and a dictionary of login secrets passed by the client.</p> <p>If the authentication is successful, the module must return the user's Matrix ID (e.g. <code>@alice:example.com</code>) and optionally a callback to be called with the response to the <code>/login</code> request. If the module doesn't wish to return a callback, it must return <code>None</code> instead.</p> <p>If the authentication is unsuccessful, the module must return <code>None</code>.</p> <p>If multiple modules register an auth checker for the same login type but with different fields, Synapse will refuse to start.</p> <p>If multiple modules register an auth checker for the same login type with the same fields, then the callbacks will be executed in order, until one returns a Matrix User ID (and optionally a callback). In that case, the return value of that callback will be accepted and subsequent callbacks will not be fired. If every callback returns <code>None</code>, then the authentication fails.</p> <h3 id="check_3pid_auth"><a class="header" href="#check_3pid_auth"><code>check_3pid_auth</code></a></h3> <p><em>First introduced in Synapse v1.46.0</em></p> <pre><code class="language-python">async def check_3pid_auth( medium: str, address: str, password: str, ) -> Optional[ Tuple[ str, Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]] ] ] </code></pre> <p>Called when a user attempts to register or log in with a third party identifier, such as email. It is passed the medium (eg. <code>email</code>), an address (eg. <code>jdoe@example.com</code>) and the user's password.</p> <p>If the authentication is successful, the module must return the user's Matrix ID (e.g. <code>@alice:example.com</code>) and optionally a callback to be called with the response to the <code>/login</code> request. If the module doesn't wish to return a callback, it must return None instead.</p> <p>If the authentication is unsuccessful, the module must return <code>None</code>.</p> <p>If multiple modules implement this callback, they will be considered in order. If a callback returns <code>None</code>, Synapse falls through to the next one. The value of the first callback that does not return <code>None</code> will be used. If this happens, Synapse will not call any of the subsequent implementations of this callback. If every callback returns <code>None</code>, the authentication is denied.</p> <h3 id="on_logged_out"><a class="header" href="#on_logged_out"><code>on_logged_out</code></a></h3> <p><em>First introduced in Synapse v1.46.0</em></p> <pre><code class="language-python">async def on_logged_out( user_id: str, device_id: Optional[str], access_token: str ) -> None </code></pre> <p>Called during a logout request for a user. It is passed the qualified user ID, the ID of the deactivated device (if any: access tokens are occasionally created without an associated device ID), and the (now deactivated) access token.</p> <p>If multiple modules implement this callback, Synapse runs them all in order.</p> <h3 id="get_username_for_registration"><a class="header" href="#get_username_for_registration"><code>get_username_for_registration</code></a></h3> <p><em>First introduced in Synapse v1.52.0</em></p> <pre><code class="language-python">async def get_username_for_registration( uia_results: Dict[str, Any], params: Dict[str, Any], ) -> Optional[str] </code></pre> <p>Called when registering a new user. The module can return a username to set for the user being registered by returning it as a string, or <code>None</code> if it doesn't wish to force a username for this user. If a username is returned, it will be used as the local part of a user's full Matrix ID (e.g. it's <code>alice</code> in <code>@alice:example.com</code>).</p> <p>This callback is called once <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a> has been completed by the user. It is not called when registering a user via SSO. It is passed two dictionaries, which include the information that the user has provided during the registration process.</p> <p>The first dictionary contains the results of the <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a> flow followed by the user. Its keys are the identifiers of every step involved in the flow, associated with either a boolean value indicating whether the step was correctly completed, or additional information (e.g. email address, phone number...). A list of most existing identifiers can be found in the <a href="https://spec.matrix.org/v1.1/client-server-api/#authentication-types">Matrix specification</a>. Here's an example featuring all currently supported keys:</p> <pre><code class="language-python">{ "m.login.dummy": True, # Dummy authentication "m.login.terms": True, # User has accepted the terms of service for the homeserver "m.login.recaptcha": True, # User has completed the recaptcha challenge "m.login.email.identity": { # User has provided and verified an email address "medium": "email", "address": "alice@example.com", "validated_at": 1642701357084, }, "m.login.msisdn": { # User has provided and verified a phone number "medium": "msisdn", "address": "33123456789", "validated_at": 1642701357084, }, "m.login.registration_token": "sometoken", # User has registered through a registration token } </code></pre> <p>The second dictionary contains the parameters provided by the user's client in the request to <code>/_matrix/client/v3/register</code>. See the <a href="https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3register">Matrix specification</a> for a complete list of these parameters.</p> <p>If the module cannot, or does not wish to, generate a username for this user, it must return <code>None</code>.</p> <p>If multiple modules implement this callback, they will be considered in order. If a callback returns <code>None</code>, Synapse falls through to the next one. The value of the first callback that does not return <code>None</code> will be used. If this happens, Synapse will not call any of the subsequent implementations of this callback. If every callback returns <code>None</code>, the username provided by the user is used, if any (otherwise one is automatically generated).</p> <h3 id="get_displayname_for_registration"><a class="header" href="#get_displayname_for_registration"><code>get_displayname_for_registration</code></a></h3> <p><em>First introduced in Synapse v1.54.0</em></p> <pre><code class="language-python">async def get_displayname_for_registration( uia_results: Dict[str, Any], params: Dict[str, Any], ) -> Optional[str] </code></pre> <p>Called when registering a new user. The module can return a display name to set for the user being registered by returning it as a string, or <code>None</code> if it doesn't wish to force a display name for this user.</p> <p>This callback is called once <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a> has been completed by the user. It is not called when registering a user via SSO. It is passed two dictionaries, which include the information that the user has provided during the registration process. These dictionaries are identical to the ones passed to <a href="#get_username_for_registration"><code>get_username_for_registration</code></a>, so refer to the documentation of this callback for more information about them.</p> <p>If multiple modules implement this callback, they will be considered in order. If a callback returns <code>None</code>, Synapse falls through to the next one. The value of the first callback that does not return <code>None</code> will be used. If this happens, Synapse will not call any of the subsequent implementations of this callback. If every callback returns <code>None</code>, the username will be used (e.g. <code>alice</code> if the user being registered is <code>@alice:example.com</code>).</p> <h2 id="is_3pid_allowed"><a class="header" href="#is_3pid_allowed"><code>is_3pid_allowed</code></a></h2> <p><em>First introduced in Synapse v1.53.0</em></p> <pre><code class="language-python">async def is_3pid_allowed(self, medium: str, address: str, registration: bool) -> bool </code></pre> <p>Called when attempting to bind a third-party identifier (i.e. an email address or a phone number). The module is given the medium of the third-party identifier (which is <code>email</code> if the identifier is an email address, or <code>msisdn</code> if the identifier is a phone number) and its address, as well as a boolean indicating whether the attempt to bind is happening as part of registering a new user. The module must return a boolean indicating whether the identifier can be allowed to be bound to an account on the local homeserver.</p> <p>If multiple modules implement this callback, they will be considered in order. If a callback returns <code>True</code>, Synapse falls through to the next one. The value of the first callback that does not return <code>True</code> will be used. If this happens, Synapse will not call any of the subsequent implementations of this callback.</p> <h2 id="example"><a class="header" href="#example">Example</a></h2> <p>The example module below implements authentication checkers for two different login types: </p> <ul> <li><code>my.login.type</code> <ul> <li>Expects a <code>my_field</code> field to be sent to <code>/login</code></li> <li>Is checked by the method: <code>self.check_my_login</code></li> </ul> </li> <li><code>m.login.password</code> (defined in <a href="https://matrix.org/docs/spec/client_server/latest#password-based">the spec</a>) <ul> <li>Expects a <code>password</code> field to be sent to <code>/login</code></li> <li>Is checked by the method: <code>self.check_pass</code></li> </ul> </li> </ul> <pre><code class="language-python">from typing import Awaitable, Callable, Optional, Tuple import synapse from synapse import module_api class MyAuthProvider: def __init__(self, config: dict, api: module_api): self.api = api self.credentials = { "bob": "building", "@scoop:matrix.org": "digging", } api.register_password_auth_provider_callbacks( auth_checkers={ ("my.login_type", ("my_field",)): self.check_my_login, ("m.login.password", ("password",)): self.check_pass, }, ) async def check_my_login( self, username: str, login_type: str, login_dict: "synapse.module_api.JsonDict", ) -> Optional[ Tuple[ str, Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]], ] ]: if login_type != "my.login_type": return None if self.credentials.get(username) == login_dict.get("my_field"): return self.api.get_qualified_user_id(username) async def check_pass( self, username: str, login_type: str, login_dict: "synapse.module_api.JsonDict", ) -> Optional[ Tuple[ str, Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]], ] ]: if login_type != "m.login.password": return None if self.credentials.get(username) == login_dict.get("password"): return self.api.get_qualified_user_id(username) </code></pre> </main> <nav class="nav-wrapper" aria-label="Page navigation"> <!-- Mobile navigation buttons --> <a rel="prev" href="../modules/account_validity_callbacks.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="../modules/background_update_controller_callbacks.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="../modules/account_validity_callbacks.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="../modules/background_update_controller_callbacks.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>