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116 lines
4.5 KiB
Markdown
116 lines
4.5 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.
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## Required methods
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Password auth provider classes must provide the following methods:
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*class* `SomeProvider.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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>
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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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*class* `SomeProvider`(*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
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methods.
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*class* `SomeProvider.get_db_schema_files`()
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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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`someprovider.get_supported_login_types`()
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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. These fields are passed in the `login_dict`
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> dictionary to `check_auth`.
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>
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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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>
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> {"com.example.custom_login": ("secret1", "secret2")}
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`someprovider.check_auth`(*username*, *login_type*, *login_dict*)
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> This method is the one that 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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>
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> It is passed the (possibly UNqualified) `user` 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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>
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> The method should return a Twisted `Deferred` 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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>
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> Alternatively, the `Deferred` 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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`someprovider.check_3pid_auth`(*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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>
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> The method should return a Twisted `Deferred` 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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>
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> As with `check_auth`, the `Deferred` may alternatively resolve to a
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> `(user_id, callback)` tuple.
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`someprovider.check_password`(*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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>
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> Iif 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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>
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> The method should return a Twisted `Deferred` object, which resolves
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> to `True` if authentication is successful, and `False` if not.
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`someprovider.on_logged_out`(*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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>
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> It may return a Twisted `Deferred` object; the logout request will
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> wait for the deferred to complete but the result is ignored.
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