jwt.html 23 KB

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  136. <h1 id="jwt-login-type"><a class="header" href="#jwt-login-type">JWT Login Type</a></h1>
  137. <p>Synapse comes with a non-standard login type to support
  138. <a href="https://en.wikipedia.org/wiki/JSON_Web_Token">JSON Web Tokens</a>. In general the
  139. documentation for
  140. <a href="https://matrix.org/docs/spec/client_server/r0.6.1#login">the login endpoint</a>
  141. is still valid (and the mechanism works similarly to the
  142. <a href="https://matrix.org/docs/spec/client_server/r0.6.1#token-based">token based login</a>).</p>
  143. <p>To log in using a JSON Web Token, clients should submit a <code>/login</code> request as
  144. follows:</p>
  145. <pre><code class="language-json">{
  146. &quot;type&quot;: &quot;org.matrix.login.jwt&quot;,
  147. &quot;token&quot;: &quot;&lt;jwt&gt;&quot;
  148. }
  149. </code></pre>
  150. <p>Note that the login type of <code>m.login.jwt</code> is supported, but is deprecated. This
  151. will be removed in a future version of Synapse.</p>
  152. <p>The <code>token</code> field should include the JSON web token with the following claims:</p>
  153. <ul>
  154. <li>The <code>sub</code> (subject) claim is required and should encode the local part of the
  155. user ID.</li>
  156. <li>The expiration time (<code>exp</code>), not before time (<code>nbf</code>), and issued at (<code>iat</code>)
  157. claims are optional, but validated if present.</li>
  158. <li>The issuer (<code>iss</code>) claim is optional, but required and validated if configured.</li>
  159. <li>The audience (<code>aud</code>) claim is optional, but required and validated if configured.
  160. Providing the audience claim when not configured will cause validation to fail.</li>
  161. </ul>
  162. <p>In the case that the token is not valid, the homeserver must respond with
  163. <code>403 Forbidden</code> and an error code of <code>M_FORBIDDEN</code>.</p>
  164. <p>As with other login types, there are additional fields (e.g. <code>device_id</code> and
  165. <code>initial_device_display_name</code>) which can be included in the above request.</p>
  166. <h2 id="preparing-synapse"><a class="header" href="#preparing-synapse">Preparing Synapse</a></h2>
  167. <p>The JSON Web Token integration in Synapse uses the
  168. <a href="https://pypi.org/project/pyjwt/"><code>PyJWT</code></a> library, which must be installed
  169. as follows:</p>
  170. <ul>
  171. <li>
  172. <p>The relevant libraries are included in the Docker images and Debian packages
  173. provided by <code>matrix.org</code> so no further action is needed.</p>
  174. </li>
  175. <li>
  176. <p>If you installed Synapse into a virtualenv, run <code>/path/to/env/bin/pip install synapse[pyjwt]</code> to install the necessary dependencies.</p>
  177. </li>
  178. <li>
  179. <p>For other installation mechanisms, see the documentation provided by the
  180. maintainer.</p>
  181. </li>
  182. </ul>
  183. <p>To enable the JSON web token integration, you should then add an <code>jwt_config</code> section
  184. to your configuration file (or uncomment the <code>enabled: true</code> line in the
  185. existing section). See <a href="./sample_config.yaml">sample_config.yaml</a> for some
  186. sample settings.</p>
  187. <h2 id="how-to-test-jwt-as-a-developer"><a class="header" href="#how-to-test-jwt-as-a-developer">How to test JWT as a developer</a></h2>
  188. <p>Although JSON Web Tokens are typically generated from an external server, the
  189. examples below use <a href="https://pyjwt.readthedocs.io/en/latest/">PyJWT</a> directly.</p>
  190. <ol>
  191. <li>
  192. <p>Configure Synapse with JWT logins, note that this example uses a pre-shared
  193. secret and an algorithm of HS256:</p>
  194. <pre><code class="language-yaml">jwt_config:
  195. enabled: true
  196. secret: &quot;my-secret-token&quot;
  197. algorithm: &quot;HS256&quot;
  198. </code></pre>
  199. </li>
  200. <li>
  201. <p>Generate a JSON web token:</p>
  202. <pre><code class="language-bash">$ pyjwt --key=my-secret-token --alg=HS256 encode sub=test-user
  203. eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0LXVzZXIifQ.Ag71GT8v01UO3w80aqRPTeuVPBIBZkYhNTJJ-_-zQIc
  204. </code></pre>
  205. </li>
  206. <li>
  207. <p>Query for the login types and ensure <code>org.matrix.login.jwt</code> is there:</p>
  208. <pre><code class="language-bash">curl http://localhost:8080/_matrix/client/r0/login
  209. </code></pre>
  210. </li>
  211. <li>
  212. <p>Login used the generated JSON web token from above:</p>
  213. <pre><code class="language-bash">$ curl http://localhost:8082/_matrix/client/r0/login -X POST \
  214. --data '{&quot;type&quot;:&quot;org.matrix.login.jwt&quot;,&quot;token&quot;:&quot;eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0LXVzZXIifQ.Ag71GT8v01UO3w80aqRPTeuVPBIBZkYhNTJJ-_-zQIc&quot;}'
  215. {
  216. &quot;access_token&quot;: &quot;&lt;access token&gt;&quot;,
  217. &quot;device_id&quot;: &quot;ACBDEFGHI&quot;,
  218. &quot;home_server&quot;: &quot;localhost:8080&quot;,
  219. &quot;user_id&quot;: &quot;@test-user:localhost:8480&quot;
  220. }
  221. </code></pre>
  222. </li>
  223. </ol>
  224. <p>You should now be able to use the returned access token to query the client API.</p>
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