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123 lines
4.9 KiB
Markdown
123 lines
4.9 KiB
Markdown
# Password auth provider modules
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Password auth providers offer a way for server administrators to
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integrate their Synapse installation with an existing authentication
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system.
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A password auth provider is a Python class which is dynamically loaded
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into Synapse, and provides a number of methods by which it can integrate
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with the authentication system.
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This document serves as a reference for those looking to implement their
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own password auth providers. Additionally, here is a list of known
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password auth provider module implementations:
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* [matrix-synapse-ldap3](https://github.com/matrix-org/matrix-synapse-ldap3/)
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* [matrix-synapse-shared-secret-auth](https://github.com/devture/matrix-synapse-shared-secret-auth)
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* [matrix-synapse-rest-password-provider](https://github.com/ma1uta/matrix-synapse-rest-password-provider)
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## Required methods
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Password auth provider classes must provide the following methods:
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* `parse_config(config)`
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This method is passed the `config` object for this module from the
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homeserver configuration file.
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It should perform any appropriate sanity checks on the provided
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configuration, and return an object which is then passed into
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`__init__`.
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This method should have the `@staticmethod` decoration.
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* `__init__(self, config, account_handler)`
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The constructor is passed the config object returned by
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`parse_config`, and a `synapse.module_api.ModuleApi` object which
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allows the password provider to check if accounts exist and/or create
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new ones.
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## Optional methods
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Password auth provider classes may optionally provide the following methods:
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* `get_db_schema_files(self)`
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This method, if implemented, should return an Iterable of
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`(name, stream)` pairs of database schema files. Each file is applied
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in turn at initialisation, and a record is then made in the database
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so that it is not re-applied on the next start.
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* `get_supported_login_types(self)`
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This method, if implemented, should return a `dict` mapping from a
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login type identifier (such as `m.login.password`) to an iterable
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giving the fields which must be provided by the user in the submission
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to [the `/login` API](https://matrix.org/docs/spec/client_server/latest#post-matrix-client-r0-login).
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These fields are passed in the `login_dict` dictionary to `check_auth`.
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For example, if a password auth provider wants to implement a custom
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login type of `com.example.custom_login`, where the client is expected
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to pass the fields `secret1` and `secret2`, the provider should
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implement this method and return the following dict:
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```python
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{"com.example.custom_login": ("secret1", "secret2")}
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```
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* `check_auth(self, username, login_type, login_dict)`
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This method does the real work. If implemented, it
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will be called for each login attempt where the login type matches one
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of the keys returned by `get_supported_login_types`.
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It is passed the (possibly unqualified) `user` field provided by the client,
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the login type, and a dictionary of login secrets passed by the
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client.
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The method should return an `Awaitable` object, which resolves
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to the canonical `@localpart:domain` user ID if authentication is
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successful, and `None` if not.
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Alternatively, the `Awaitable` can resolve to a `(str, func)` tuple, in
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which case the second field is a callback which will be called with
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the result from the `/login` call (including `access_token`,
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`device_id`, etc.)
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* `check_3pid_auth(self, medium, address, password)`
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This method, if implemented, is called when a user attempts to
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register or log in with a third party identifier, such as email. It is
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passed the medium (ex. "email"), an address (ex.
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"<jdoe@example.com>") and the user's password.
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The method should return an `Awaitable` object, which resolves
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to a `str` containing the user's (canonical) User id if
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authentication was successful, and `None` if not.
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As with `check_auth`, the `Awaitable` may alternatively resolve to a
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`(user_id, callback)` tuple.
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* `check_password(self, user_id, password)`
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This method provides a simpler interface than
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`get_supported_login_types` and `check_auth` for password auth
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providers that just want to provide a mechanism for validating
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`m.login.password` logins.
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If implemented, it will be called to check logins with an
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`m.login.password` login type. It is passed a qualified
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`@localpart:domain` user id, and the password provided by the user.
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The method should return an `Awaitable` object, which resolves
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to `True` if authentication is successful, and `False` if not.
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* `on_logged_out(self, user_id, device_id, access_token)`
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This method, if implemented, is called when a user logs out. It is
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passed the qualified user ID, the ID of the deactivated device (if
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any: access tokens are occasionally created without an associated
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device ID), and the (now deactivated) access token.
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It may return an `Awaitable` object; the logout request will
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wait for the `Awaitable` to complete, but the result is ignored.
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