mirror of
https://mau.dev/maunium/synapse.git
synced 2024-12-17 03:23:56 +01:00
105 lines
3.8 KiB
Markdown
105 lines
3.8 KiB
Markdown
# JWT Login Type
|
|
|
|
Synapse comes with a non-standard login type to support
|
|
[JSON Web Tokens](https://en.wikipedia.org/wiki/JSON_Web_Token). In general the
|
|
documentation for
|
|
[the login endpoint](https://matrix.org/docs/spec/client_server/r0.6.1#login)
|
|
is still valid (and the mechanism works similarly to the
|
|
[token based login](https://matrix.org/docs/spec/client_server/r0.6.1#token-based)).
|
|
|
|
To log in using a JSON Web Token, clients should submit a `/login` request as
|
|
follows:
|
|
|
|
```json
|
|
{
|
|
"type": "org.matrix.login.jwt",
|
|
"token": "<jwt>"
|
|
}
|
|
```
|
|
|
|
The `token` field should include the JSON web token with the following claims:
|
|
|
|
* A claim that encodes the local part of the user ID is required. By default,
|
|
the `sub` (subject) claim is used, or a custom claim can be set in the
|
|
configuration file.
|
|
* The expiration time (`exp`), not before time (`nbf`), and issued at (`iat`)
|
|
claims are optional, but validated if present.
|
|
* The issuer (`iss`) claim is optional, but required and validated if configured.
|
|
* The audience (`aud`) claim is optional, but required and validated if configured.
|
|
Providing the audience claim when not configured will cause validation to fail.
|
|
|
|
In the case that the token is not valid, the homeserver must respond with
|
|
`403 Forbidden` and an error code of `M_FORBIDDEN`.
|
|
|
|
As with other login types, there are additional fields (e.g. `device_id` and
|
|
`initial_device_display_name`) which can be included in the above request.
|
|
|
|
## Preparing Synapse
|
|
|
|
The JSON Web Token integration in Synapse uses the
|
|
[`Authlib`](https://docs.authlib.org/en/latest/index.html) library, which must be installed
|
|
as follows:
|
|
|
|
* The relevant libraries are included in the Docker images and Debian packages
|
|
provided by `matrix.org` so no further action is needed.
|
|
|
|
* If you installed Synapse into a virtualenv, run `/path/to/env/bin/pip
|
|
install synapse[jwt]` to install the necessary dependencies.
|
|
|
|
* For other installation mechanisms, see the documentation provided by the
|
|
maintainer.
|
|
|
|
To enable the JSON web token integration, you should then add a `jwt_config` option
|
|
to your configuration file. See the [configuration manual](usage/configuration/config_documentation.md#jwt_config) for some
|
|
sample settings.
|
|
|
|
## How to test JWT as a developer
|
|
|
|
Although JSON Web Tokens are typically generated from an external server, the
|
|
example below uses a locally generated JWT.
|
|
|
|
1. Configure Synapse with JWT logins, note that this example uses a pre-shared
|
|
secret and an algorithm of HS256:
|
|
|
|
```yaml
|
|
jwt_config:
|
|
enabled: true
|
|
secret: "my-secret-token"
|
|
algorithm: "HS256"
|
|
```
|
|
2. Generate a JSON web token:
|
|
|
|
You can use the following short Python snippet to generate a JWT
|
|
protected by an HMAC.
|
|
Take care that the `secret` and the algorithm given in the `header` match
|
|
the entries from `jwt_config` above.
|
|
|
|
```python
|
|
from authlib.jose import jwt
|
|
|
|
header = {"alg": "HS256"}
|
|
payload = {"sub": "user1", "aud": ["audience"]}
|
|
secret = "my-secret-token"
|
|
result = jwt.encode(header, payload, secret)
|
|
print(result.decode("ascii"))
|
|
```
|
|
|
|
3. Query for the login types and ensure `org.matrix.login.jwt` is there:
|
|
|
|
```bash
|
|
curl http://localhost:8080/_matrix/client/r0/login
|
|
```
|
|
4. Login used the generated JSON web token from above:
|
|
|
|
```bash
|
|
$ curl http://localhost:8082/_matrix/client/r0/login -X POST \
|
|
--data '{"type":"org.matrix.login.jwt","token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0LXVzZXIifQ.Ag71GT8v01UO3w80aqRPTeuVPBIBZkYhNTJJ-_-zQIc"}'
|
|
{
|
|
"access_token": "<access token>",
|
|
"device_id": "ACBDEFGHI",
|
|
"home_server": "localhost:8080",
|
|
"user_id": "@test-user:localhost:8480"
|
|
}
|
|
```
|
|
|
|
You should now be able to use the returned access token to query the client API.
|