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< h1 id = "configuring-synapse-to-authenticate-against-an-openid-connect-provider" > < a class = "header" href = "#configuring-synapse-to-authenticate-against-an-openid-connect-provider" > Configuring Synapse to authenticate against an OpenID Connect provider< / a > < / h1 >
< p > Synapse can be configured to use an OpenID Connect Provider (OP) for
authentication, instead of its own local password database.< / p >
< p > Any OP should work with Synapse, as long as it supports the authorization code
flow. There are a few options for that:< / p >
< ul >
< li >
< p > start a local OP. Synapse has been tested with < a href = "https://www.ory.sh/docs/hydra/" > Hydra< / a > and
< a href = "https://github.com/dexidp/dex" > Dex< / a > . Note that for an OP to work, it should be served under a
secure (HTTPS) origin. A certificate signed with a self-signed, locally
trusted CA should work. In that case, start Synapse with a < code > SSL_CERT_FILE< / code >
environment variable set to the path of the CA.< / p >
< / li >
< li >
< p > set up a SaaS OP, like < a href = "https://developers.google.com/identity/protocols/oauth2/openid-connect" > Google< / a > , < a href = "https://auth0.com/" > Auth0< / a > or
< a href = "https://www.okta.com/" > Okta< / a > . Synapse has been tested with Auth0 and Google.< / p >
< / li >
< / ul >
< p > It may also be possible to use other OAuth2 providers which provide the
< a href = "https://tools.ietf.org/html/rfc6749#section-4.1" > authorization code grant type< / a > ,
such as < a href = "https://developer.github.com/apps/building-oauth-apps/authorizing-oauth-apps" > Github< / a > .< / p >
< h2 id = "preparing-synapse" > < a class = "header" href = "#preparing-synapse" > Preparing Synapse< / a > < / h2 >
< p > The OpenID integration in Synapse uses the
< a href = "https://pypi.org/project/Authlib/" > < code > authlib< / code > < / a > library, which must be installed
as follows:< / p >
< ul >
< li >
< p > The relevant libraries are included in the Docker images and Debian packages
provided by < code > matrix.org< / code > so no further action is needed.< / p >
< / li >
< li >
< p > If you installed Synapse into a virtualenv, run < code > /path/to/env/bin/pip install matrix-synapse[oidc]< / code > to install the necessary dependencies.< / p >
< / li >
< li >
< p > For other installation mechanisms, see the documentation provided by the
maintainer.< / p >
< / li >
< / ul >
< p > To enable the OpenID integration, you should then add a section to the < code > oidc_providers< / code >
setting in your configuration file (or uncomment one of the existing examples).
See < a href = "./sample_config.yaml" > sample_config.yaml< / a > for some sample settings, as well as
the text below for example configurations for specific providers.< / p >
< h2 id = "sample-configs" > < a class = "header" href = "#sample-configs" > Sample configs< / a > < / h2 >
< p > Here are a few configs for providers that should work with Synapse.< / p >
< h3 id = "microsoft-azure-active-directory" > < a class = "header" href = "#microsoft-azure-active-directory" > Microsoft Azure Active Directory< / a > < / h3 >
< p > Azure AD can act as an OpenID Connect Provider. Register a new application under
< em > App registrations< / em > in the Azure AD management console. The RedirectURI for your
application should point to your matrix server:
< code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / p >
< p > Go to < em > Certificates & secrets< / em > and register a new client secret. Make note of your
Directory (tenant) ID as it will be used in the Azure links.
Edit your Synapse config file and change the < code > oidc_config< / code > section:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: microsoft
idp_name: Microsoft
issuer: " https://login.microsoftonline.com/< tenant id> /v2.0"
client_id: " < client id> "
client_secret: " < client secret> "
scopes: [" openid" , " profile" ]
authorization_endpoint: " https://login.microsoftonline.com/< tenant id> /oauth2/v2.0/authorize"
token_endpoint: " https://login.microsoftonline.com/< tenant id> /oauth2/v2.0/token"
userinfo_endpoint: " https://graph.microsoft.com/oidc/userinfo"
user_mapping_provider:
config:
localpart_template: " {{ user.preferred_username.split('@')[0] }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "dex" > < a class = "header" href = "#dex" > Dex< / a > < / h3 >
< p > < a href = "https://github.com/dexidp/dex" > Dex< / a > is a simple, open-source, certified OpenID Connect Provider.
Although it is designed to help building a full-blown provider with an
external database, it can be configured with static passwords in a config file.< / p >
< p > Follow the < a href = "https://dexidp.io/docs/getting-started/" > Getting Started guide< / a >
to install Dex.< / p >
< p > Edit < code > examples/config-dev.yaml< / code > config file from the Dex repo to add a client:< / p >
< pre > < code class = "language-yaml" > staticClients:
- id: synapse
secret: secret
redirectURIs:
- '[synapse public baseurl]/_synapse/client/oidc/callback'
name: 'Synapse'
< / code > < / pre >
< p > Run with < code > dex serve examples/config-dev.yaml< / code > .< / p >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: dex
idp_name: " My Dex server"
skip_verification: true # This is needed as Dex is served on an insecure endpoint
issuer: " http://127.0.0.1:5556/dex"
client_id: " synapse"
client_secret: " secret"
scopes: [" openid" , " profile" ]
user_mapping_provider:
config:
localpart_template: " {{ user.name }}"
display_name_template: " {{ user.name|capitalize }}"
< / code > < / pre >
< h3 id = "keycloak" > < a class = "header" href = "#keycloak" > Keycloak< / a > < / h3 >
< p > < a href = "https://www.keycloak.org/docs/latest/server_admin/#sso-protocols" > Keycloak< / a > is an opensource IdP maintained by Red Hat.< / p >
< p > Follow the < a href = "https://www.keycloak.org/getting-started" > Getting Started Guide< / a > to install Keycloak and set up a realm.< / p >
< ol >
< li >
< p > Click < code > Clients< / code > in the sidebar and click < code > Create< / code > < / p >
< / li >
< li >
< p > Fill in the fields as below:< / p >
< / li >
< / ol >
< table > < thead > < tr > < th > Field< / th > < th > Value< / th > < / tr > < / thead > < tbody >
< tr > < td > Client ID< / td > < td > < code > synapse< / code > < / td > < / tr >
< tr > < td > Client Protocol< / td > < td > < code > openid-connect< / code > < / td > < / tr >
< / tbody > < / table >
< ol start = "3" >
< li > Click < code > Save< / code > < / li >
< li > Fill in the fields as below:< / li >
< / ol >
< table > < thead > < tr > < th > Field< / th > < th > Value< / th > < / tr > < / thead > < tbody >
< tr > < td > Client ID< / td > < td > < code > synapse< / code > < / td > < / tr >
< tr > < td > Enabled< / td > < td > < code > On< / code > < / td > < / tr >
< tr > < td > Client Protocol< / td > < td > < code > openid-connect< / code > < / td > < / tr >
< tr > < td > Access Type< / td > < td > < code > confidential< / code > < / td > < / tr >
< tr > < td > Valid Redirect URIs< / td > < td > < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / td > < / tr >
< / tbody > < / table >
< ol start = "5" >
< li > Click < code > Save< / code > < / li >
< li > On the Credentials tab, update the fields:< / li >
< / ol >
< table > < thead > < tr > < th > Field< / th > < th > Value< / th > < / tr > < / thead > < tbody >
< tr > < td > Client Authenticator< / td > < td > < code > Client ID and Secret< / code > < / td > < / tr >
< / tbody > < / table >
< ol start = "7" >
< li > Click < code > Regenerate Secret< / code > < / li >
< li > Copy Secret< / li >
< / ol >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: keycloak
idp_name: " My KeyCloak server"
issuer: " https://127.0.0.1:8443/auth/realms/{realm_name}"
client_id: " synapse"
client_secret: " copy secret generated from above"
scopes: [" openid" , " profile" ]
user_mapping_provider:
config:
localpart_template: " {{ user.preferred_username }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "auth0" > < a class = "header" href = "#auth0" > Auth0< / a > < / h3 >
< p > < a href = "https://auth0.com/" > Auth0< / a > is a hosted SaaS IdP solution.< / p >
< ol >
< li >
< p > Create a regular web application for Synapse< / p >
< / li >
< li >
< p > Set the Allowed Callback URLs to < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / p >
< / li >
< li >
< p > Add a rule to add the < code > preferred_username< / code > claim.< / p >
< details >
< summary > Code sample< / summary >
< pre > < code class = "language-js" > function addPersistenceAttribute(user, context, callback) {
user.user_metadata = user.user_metadata || {};
user.user_metadata.preferred_username = user.user_metadata.preferred_username || user.user_id;
context.idToken.preferred_username = user.user_metadata.preferred_username;
auth0.users.updateUserMetadata(user.user_id, user.user_metadata)
.then(function(){
callback(null, user, context);
})
.catch(function(err){
callback(err);
});
}
< / code > < / pre >
< / li >
< / ol >
< / details >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: auth0
idp_name: Auth0
issuer: " https://your-tier.eu.auth0.com/" # TO BE FILLED
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
scopes: [" openid" , " profile" ]
user_mapping_provider:
config:
localpart_template: " {{ user.preferred_username }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "github" > < a class = "header" href = "#github" > GitHub< / a > < / h3 >
< p > < a href = "https://developer.github.com/apps/building-oauth-apps/authorizing-oauth-apps" > GitHub< / a > is a bit special as it is not an OpenID Connect compliant provider, but
just a regular OAuth2 provider.< / p >
< p > The < a href = "https://developer.github.com/v3/users/#get-the-authenticated-user" > < code > /user< / code > API endpoint< / a >
can be used to retrieve information on the authenticated user. As the Synapse
login mechanism needs an attribute to uniquely identify users, and that endpoint
does not return a < code > sub< / code > property, an alternative < code > subject_claim< / code > has to be set.< / p >
< ol >
< li > Create a new OAuth application: https://github.com/settings/applications/new.< / li >
< li > Set the callback URL to < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > .< / li >
< / ol >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: github
idp_name: Github
idp_brand: " github" # optional: styling hint for clients
discover: false
issuer: " https://github.com/"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
authorization_endpoint: " https://github.com/login/oauth/authorize"
token_endpoint: " https://github.com/login/oauth/access_token"
userinfo_endpoint: " https://api.github.com/user"
scopes: [" read:user" ]
user_mapping_provider:
config:
subject_claim: " id"
localpart_template: " {{ user.login }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "google" > < a class = "header" href = "#google" > Google< / a > < / h3 >
< p > < a href = "https://developers.google.com/identity/protocols/oauth2/openid-connect" > Google< / a > is an OpenID certified authentication and authorisation provider.< / p >
< ol >
< li > Set up a project in the Google API Console (see
https://developers.google.com/identity/protocols/oauth2/openid-connect#appsetup).< / li >
< li > Add an " OAuth Client ID" for a Web Application under " Credentials" .< / li >
< li > Copy the Client ID and Client Secret, and add the following to your synapse config:
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: google
idp_name: Google
idp_brand: " google" # optional: styling hint for clients
issuer: " https://accounts.google.com/"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
scopes: [" openid" , " profile" ]
user_mapping_provider:
config:
localpart_template: " {{ user.given_name|lower }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< / li >
< li > Back in the Google console, add this Authorized redirect URI: < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > .< / li >
< / ol >
< h3 id = "twitch" > < a class = "header" href = "#twitch" > Twitch< / a > < / h3 >
< ol >
< li > Setup a developer account on < a href = "https://dev.twitch.tv/" > Twitch< / a > < / li >
< li > Obtain the OAuth 2.0 credentials by < a href = "https://dev.twitch.tv/console/apps/" > creating an app< / a > < / li >
< li > Add this OAuth Redirect URL: < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / li >
< / ol >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: twitch
idp_name: Twitch
issuer: " https://id.twitch.tv/oauth2/"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
client_auth_method: " client_secret_post"
user_mapping_provider:
config:
localpart_template: " {{ user.preferred_username }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "gitlab" > < a class = "header" href = "#gitlab" > GitLab< / a > < / h3 >
< ol >
< li > Create a < a href = "https://gitlab.com/profile/applications" > new application< / a > .< / li >
< li > Add the < code > read_user< / code > and < code > openid< / code > scopes.< / li >
< li > Add this Callback URL: < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / li >
< / ol >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: gitlab
idp_name: Gitlab
idp_brand: " gitlab" # optional: styling hint for clients
issuer: " https://gitlab.com/"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
client_auth_method: " client_secret_post"
scopes: [" openid" , " read_user" ]
user_profile_method: " userinfo_endpoint"
user_mapping_provider:
config:
localpart_template: '{{ user.nickname }}'
display_name_template: '{{ user.name }}'
< / code > < / pre >
< h3 id = "facebook" > < a class = "header" href = "#facebook" > Facebook< / a > < / h3 >
< p > Like Github, Facebook provide a custom OAuth2 API rather than an OIDC-compliant
one so requires a little more configuration.< / p >
< ol start = "0" >
< li > You will need a Facebook developer account. You can register for one
< a href = "https://developers.facebook.com/async/registration/" > here< / a > .< / li >
< li > On the < a href = "https://developers.facebook.com/apps/" > apps< / a > page of the developer
console, " Create App" , and choose " Build Connected Experiences" .< / li >
< li > Once the app is created, add " Facebook Login" and choose " Web" . You don't
need to go through the whole form here.< / li >
< li > In the left-hand menu, open " Products" /" Facebook Login" /" Settings" .
< ul >
< li > Add < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > as an OAuth Redirect
URL.< / li >
< / ul >
< / li >
< li > In the left-hand menu, open " Settings/Basic" . Here you can copy the " App ID"
and " App Secret" for use below.< / li >
< / ol >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > - idp_id: facebook
idp_name: Facebook
idp_brand: " facebook" # optional: styling hint for clients
discover: false
issuer: " https://facebook.com"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
scopes: [" openid" , " email" ]
authorization_endpoint: https://facebook.com/dialog/oauth
token_endpoint: https://graph.facebook.com/v9.0/oauth/access_token
user_profile_method: " userinfo_endpoint"
userinfo_endpoint: " https://graph.facebook.com/v9.0/me?fields=id,name,email,picture"
user_mapping_provider:
config:
subject_claim: " id"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< p > Relevant documents:< / p >
< ul >
< li > https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow< / li >
< li > Using Facebook's Graph API: https://developers.facebook.com/docs/graph-api/using-graph-api/< / li >
< li > Reference to the User endpoint: https://developers.facebook.com/docs/graph-api/reference/user< / li >
< / ul >
< h3 id = "gitea" > < a class = "header" href = "#gitea" > Gitea< / a > < / h3 >
< p > Gitea is, like Github, not an OpenID provider, but just an OAuth2 provider.< / p >
< p > The < a href = "https://try.gitea.io/api/swagger#/user/userGetCurrent" > < code > /user< / code > API endpoint< / a >
can be used to retrieve information on the authenticated user. As the Synapse
login mechanism needs an attribute to uniquely identify users, and that endpoint
does not return a < code > sub< / code > property, an alternative < code > subject_claim< / code > has to be set.< / p >
< ol >
< li > Create a new application.< / li >
< li > Add this Callback URL: < code > [synapse public baseurl]/_synapse/client/oidc/callback< / code > < / li >
< / ol >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: gitea
idp_name: Gitea
discover: false
issuer: " https://your-gitea.com/"
client_id: " your-client-id" # TO BE FILLED
client_secret: " your-client-secret" # TO BE FILLED
client_auth_method: client_secret_post
scopes: [] # Gitea doesn't support Scopes
authorization_endpoint: " https://your-gitea.com/login/oauth/authorize"
token_endpoint: " https://your-gitea.com/login/oauth/access_token"
userinfo_endpoint: " https://your-gitea.com/api/v1/user"
user_mapping_provider:
config:
subject_claim: " id"
localpart_template: " {{ user.login }}"
display_name_template: " {{ user.full_name }}"
< / code > < / pre >
< h3 id = "xwiki" > < a class = "header" href = "#xwiki" > XWiki< / a > < / h3 >
< p > Install < a href = "https://extensions.xwiki.org/xwiki/bin/view/Extension/OpenID%20Connect/OpenID%20Connect%20Provider/" > OpenID Connect Provider< / a > extension in your < a href = "https://www.xwiki.org" > XWiki< / a > instance.< / p >
< p > Synapse config:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: xwiki
idp_name: " XWiki"
issuer: " https://myxwikihost/xwiki/oidc/"
client_id: " your-client-id" # TO BE FILLED
client_auth_method: none
scopes: [" openid" , " profile" ]
user_profile_method: " userinfo_endpoint"
user_mapping_provider:
config:
localpart_template: " {{ user.preferred_username }}"
display_name_template: " {{ user.name }}"
< / code > < / pre >
< h3 id = "apple" > < a class = "header" href = "#apple" > Apple< / a > < / h3 >
< p > Configuring " Sign in with Apple" (SiWA) requires an Apple Developer account.< / p >
< p > You will need to create a new " Services ID" for SiWA, and create and download a
private key with " SiWA" enabled.< / p >
< p > As well as the private key file, you will need:< / p >
< ul >
< li > Client ID: the " identifier" you gave the " Services ID" < / li >
< li > Team ID: a 10-character ID associated with your developer account.< / li >
< li > Key ID: the 10-character identifier for the key.< / li >
< / ul >
< p > https://help.apple.com/developer-account/?lang=en#/dev77c875b7e has more
documentation on setting up SiWA.< / p >
< p > The synapse config will look like this:< / p >
< pre > < code class = "language-yaml" > - idp_id: apple
idp_name: Apple
issuer: " https://appleid.apple.com"
client_id: " your-client-id" # Set to the " identifier" for your " ServicesID"
client_auth_method: " client_secret_post"
client_secret_jwt_key:
key_file: " /path/to/AuthKey_KEYIDCODE.p8" # point to your key file
jwt_header:
alg: ES256
kid: " KEYIDCODE" # Set to the 10-char Key ID
jwt_payload:
iss: TEAMIDCODE # Set to the 10-char Team ID
scopes: [" name" , " email" , " openid" ]
authorization_endpoint: https://appleid.apple.com/auth/authorize?response_mode=form_post
user_mapping_provider:
config:
email_template: " {{ user.email }}"
< / code > < / pre >
< h2 id = "django-oauth-toolkit" > < a class = "header" href = "#django-oauth-toolkit" > Django OAuth Toolkit< / a > < / h2 >
< p > < a href = "https://github.com/jazzband/django-oauth-toolkit" > django-oauth-toolkit< / a > is a
Django application providing out of the box all the endpoints, data and logic
needed to add OAuth2 capabilities to your Django projects. It supports
< a href = "https://django-oauth-toolkit.readthedocs.io/en/latest/oidc.html" > OpenID Connect too< / a > .< / p >
< p > Configuration on Django's side:< / p >
< ol >
< li > Add an application: https://example.com/admin/oauth2_provider/application/add/ and choose parameters like this:< / li >
< / ol >
< ul >
< li > < code > Redirect uris< / code > : https://synapse.example.com/_synapse/client/oidc/callback< / li >
< li > < code > Client type< / code > : < code > Confidential< / code > < / li >
< li > < code > Authorization grant type< / code > : < code > Authorization code< / code > < / li >
< li > < code > Algorithm< / code > : < code > HMAC with SHA-2 256< / code > < / li >
< / ul >
< ol start = "2" >
< li >
< p > You can < a href = "https://django-oauth-toolkit.readthedocs.io/en/latest/oidc.html#customizing-the-oidc-responses" > customize the claims< / a > Django gives to synapse (optional):< / p >
< details >
< summary > Code sample< / summary >
< pre > < code class = "language-python" > class CustomOAuth2Validator(OAuth2Validator):
def get_additional_claims(self, request):
return {
" sub" : request.user.email,
" email" : request.user.email,
" first_name" : request.user.first_name,
" last_name" : request.user.last_name,
}
< / code > < / pre >
< / details >
< / li >
< / ol >
< p > Your synapse config is then:< / p >
< pre > < code class = "language-yaml" > oidc_providers:
- idp_id: django_example
idp_name: " Django Example"
issuer: " https://example.com/o/"
client_id: " your-client-id" # CHANGE ME
client_secret: " your-client-secret" # CHANGE ME
scopes: [" openid" ]
user_profile_method: " userinfo_endpoint" # needed because oauth-toolkit does not include user information in the authorization response
user_mapping_provider:
config:
localpart_template: " {{ user.email.split('@')[0] }}"
display_name_template: " {{ user.first_name }} {{ user.last_name }}"
email_template: " {{ user.email }}"
< / code > < / pre >
< / main >
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