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Land support for multiple OIDC providers (#9110) 

This is the final step for supporting multiple OIDC providers concurrently.

First of all, we reorganise the config so that you can specify a list of OIDC providers, instead of a single one. Before:

    oidc_config:
       enabled: true
       issuer: "https://oidc_provider"
       # etc

After:

    oidc_providers:
     - idp_id: prov1
       issuer: "https://oidc_provider"

     - idp_id: prov2
       issuer: "https://another_oidc_provider"

The old format is still grandfathered in.

With that done, it's then simply a matter of having OidcHandler instantiate a new OidcProvider for each configured provider.
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Richard van der Hoff 2021-01-15 16:55:29 +00:00 committed by GitHub
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1
changelog.d/9110.feature Normal file
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@ -0,0 +1 @@
Add support for multiple SSO Identity Providers.

199
docs/openid.md
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@ -42,11 +42,10 @@ as follows:
* For other installation mechanisms, see the documentation provided by the
maintainer.
To enable the OpenID integration, you should then add an `oidc_config` section
to your configuration file (or uncomment the `enabled: true` line in the
existing section). See [sample_config.yaml](./sample_config.yaml) for some
sample settings, as well as the text below for example configurations for
specific providers.
To enable the OpenID integration, you should then add a section to the `oidc_providers`
setting in your configuration file (or uncomment one of the existing examples).
See [sample_config.yaml](./sample_config.yaml) for some sample settings, as well as
the text below for example configurations for specific providers.
## Sample configs
@ -62,20 +61,21 @@ Directory (tenant) ID as it will be used in the Azure links.
Edit your Synapse config file and change the `oidc_config` section:
```yaml
oidc_config:
enabled: true
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"
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 }}"
user_mapping_provider:
config:
localpart_template: "{{ user.preferred_username.split('@')[0] }}"
display_name_template: "{{ user.name }}"
```
### [Dex][dex-idp]
@ -103,17 +103,18 @@ Run with `dex serve examples/config-dev.yaml`.
Synapse config:
```yaml
oidc_config:
enabled: true
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 }}"
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 }}"
```
### [Keycloak][keycloak-idp]
@ -152,16 +153,17 @@ Follow the [Getting Started Guide](https://www.keycloak.org/getting-started) to
8. Copy Secret
```yaml
oidc_config:
enabled: true
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 }}"
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 }}"
```
### [Auth0][auth0]
@ -191,16 +193,17 @@ oidc_config:
Synapse config:
```yaml
oidc_config:
enabled: true
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 }}"
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 }}"
```
### GitHub
@ -219,21 +222,22 @@ does not return a `sub` property, an alternative `subject_claim` has to be set.
Synapse config:
```yaml
oidc_config:
enabled: true
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 }}"
oidc_providers:
- idp_id: github
idp_name: Github
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 }}"
```
### [Google][google-idp]
@ -243,16 +247,17 @@ oidc_config:
2. add an "OAuth Client ID" for a Web Application under "Credentials".
3. Copy the Client ID and Client Secret, and add the following to your synapse config:
```yaml
oidc_config:
enabled: true
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 }}"
oidc_providers:
- idp_id: google
idp_name: Google
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 }}"
```
4. Back in the Google console, add this Authorized redirect URI: `[synapse
public baseurl]/_synapse/oidc/callback`.
@ -266,16 +271,17 @@ oidc_config:
Synapse config:
```yaml
oidc_config:
enabled: true
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 }}"
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 }}"
```
### GitLab
@ -287,16 +293,17 @@ oidc_config:
Synapse config:
```yaml
oidc_config:
enabled: true
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 }}'
oidc_providers:
- idp_id: gitlab
idp_name: Gitlab
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 }}'
```

262
docs/sample_config.yaml
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@ -1709,141 +1709,149 @@ saml2_config:
#idp_entityid: 'https://our_idp/entityid'
# Enable OpenID Connect (OIDC) / OAuth 2.0 for registration and login.
# List of OpenID Connect (OIDC) / OAuth 2.0 identity providers, for registration
# and login.
#
# Options for each entry include:
#
# idp_id: a unique identifier for this identity provider. Used internally
# by Synapse; should be a single word such as 'github'.
#
# Note that, if this is changed, users authenticating via that provider
# will no longer be recognised as the same user!
#
# idp_name: A user-facing name for this identity provider, which is used to
# offer the user a choice of login mechanisms.
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
#
# issuer: Required. The OIDC issuer. Used to validate tokens and (if discovery
# is enabled) to discover the provider's endpoints.
#
# client_id: Required. oauth2 client id to use.
#
# client_secret: Required. oauth2 client secret to use.
#
# client_auth_method: auth method to use when exchanging the token. Valid
# values are 'client_secret_basic' (default), 'client_secret_post' and
# 'none'.
#
# scopes: list of scopes to request. This should normally include the "openid"
# scope. Defaults to ["openid"].
#
# authorization_endpoint: the oauth2 authorization endpoint. Required if
# provider discovery is disabled.
#
# token_endpoint: the oauth2 token endpoint. Required if provider discovery is
# disabled.
#
# userinfo_endpoint: the OIDC userinfo endpoint. Required if discovery is
# disabled and the 'openid' scope is not requested.
#
# jwks_uri: URI where to fetch the JWKS. Required if discovery is disabled and
# the 'openid' scope is used.
#
# skip_verification: set to 'true' to skip metadata verification. Use this if
# you are connecting to a provider that is not OpenID Connect compliant.
# Defaults to false. Avoid this in production.
#
# user_profile_method: Whether to fetch the user profile from the userinfo
# endpoint. Valid values are: 'auto' or 'userinfo_endpoint'.
#
# Defaults to 'auto', which fetches the userinfo endpoint if 'openid' is
# included in 'scopes'. Set to 'userinfo_endpoint' to always fetch the
# userinfo endpoint.
#
# allow_existing_users: set to 'true' to allow a user logging in via OIDC to
# match a pre-existing account instead of failing. This could be used if
# switching from password logins to OIDC. Defaults to false.
#
# user_mapping_provider: Configuration for how attributes returned from a OIDC
# provider are mapped onto a matrix user. This setting has the following
# sub-properties:
#
# module: The class name of a custom mapping module. Default is
# 'synapse.handlers.oidc_handler.JinjaOidcMappingProvider'.
# See https://github.com/matrix-org/synapse/blob/master/docs/sso_mapping_providers.md#openid-mapping-providers
# for information on implementing a custom mapping provider.
#
# config: Configuration for the mapping provider module. This section will
# be passed as a Python dictionary to the user mapping provider
# module's `parse_config` method.
#
# For the default provider, the following settings are available:
#
# sub: name of the claim containing a unique identifier for the
# user. Defaults to 'sub', which OpenID Connect compliant
# providers should provide.
#
# localpart_template: Jinja2 template for the localpart of the MXID.
# If this is not set, the user will be prompted to choose their
# own username.
#
# display_name_template: Jinja2 template for the display name to set
# on first login. If unset, no displayname will be set.
#
# extra_attributes: a map of Jinja2 templates for extra attributes
# to send back to the client during login.
# Note that these are non-standard and clients will ignore them
# without modifications.
#
# When rendering, the Jinja2 templates are given a 'user' variable,
# which is set to the claims returned by the UserInfo Endpoint and/or
# in the ID Token.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/openid.md
# for some example configurations.
# for information on how to configure these options.
#
oidc_config:
# Uncomment the following to enable authorization against an OpenID Connect
# server. Defaults to false.
# For backwards compatibility, it is also possible to configure a single OIDC
# provider via an 'oidc_config' setting. This is now deprecated and admins are
# advised to migrate to the 'oidc_providers' format.
#
oidc_providers:
# Generic example
#
#enabled: true
#- idp_id: my_idp
# idp_name: "My OpenID provider"
# discover: false
# issuer: "https://accounts.example.com/"
# client_id: "provided-by-your-issuer"
# client_secret: "provided-by-your-issuer"
# client_auth_method: client_secret_post
# scopes: ["openid", "profile"]
# authorization_endpoint: "https://accounts.example.com/oauth2/auth"
# token_endpoint: "https://accounts.example.com/oauth2/token"
# userinfo_endpoint: "https://accounts.example.com/userinfo"
# jwks_uri: "https://accounts.example.com/.well-known/jwks.json"
# skip_verification: true
# Uncomment the following to disable use of the OIDC discovery mechanism to
# discover endpoints. Defaults to true.
# For use with Keycloak
#
#discover: false
#- idp_id: keycloak
# idp_name: Keycloak
# issuer: "https://127.0.0.1:8443/auth/realms/my_realm_name"
# client_id: "synapse"
# client_secret: "copy secret generated in Keycloak UI"
# scopes: ["openid", "profile"]
# the OIDC issuer. Used to validate tokens and (if discovery is enabled) to
# discover the provider's endpoints.
# For use with Github
#
# Required if 'enabled' is true.
#
#issuer: "https://accounts.example.com/"
# oauth2 client id to use.
#
# Required if 'enabled' is true.
#
#client_id: "provided-by-your-issuer"
# oauth2 client secret to use.
#
# Required if 'enabled' is true.
#
#client_secret: "provided-by-your-issuer"
# auth method to use when exchanging the token.
# Valid values are 'client_secret_basic' (default), 'client_secret_post' and
# 'none'.
#
#client_auth_method: client_secret_post
# list of scopes to request. This should normally include the "openid" scope.
# Defaults to ["openid"].
#
#scopes: ["openid", "profile"]
# the oauth2 authorization endpoint. Required if provider discovery is disabled.
#
#authorization_endpoint: "https://accounts.example.com/oauth2/auth"
# the oauth2 token endpoint. Required if provider discovery is disabled.
#
#token_endpoint: "https://accounts.example.com/oauth2/token"
# the OIDC userinfo endpoint. Required if discovery is disabled and the
# "openid" scope is not requested.
#
#userinfo_endpoint: "https://accounts.example.com/userinfo"
# URI where to fetch the JWKS. Required if discovery is disabled and the
# "openid" scope is used.
#
#jwks_uri: "https://accounts.example.com/.well-known/jwks.json"
# Uncomment to skip metadata verification. Defaults to false.
#
# Use this if you are connecting to a provider that is not OpenID Connect
# compliant.
# Avoid this in production.
#
#skip_verification: true
# Whether to fetch the user profile from the userinfo endpoint. Valid
# values are: "auto" or "userinfo_endpoint".
#
# Defaults to "auto", which fetches the userinfo endpoint if "openid" is included
# in `scopes`. Uncomment the following to always fetch the userinfo endpoint.
#
#user_profile_method: "userinfo_endpoint"
# Uncomment to allow a user logging in via OIDC to match a pre-existing account instead
# of failing. This could be used if switching from password logins to OIDC. Defaults to false.
#
#allow_existing_users: true
# An external module can be provided here as a custom solution to mapping
# attributes returned from a OIDC provider onto a matrix user.
#
user_mapping_provider:
# The custom module's class. Uncomment to use a custom module.
# Default is 'synapse.handlers.oidc_handler.JinjaOidcMappingProvider'.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/sso_mapping_providers.md#openid-mapping-providers
# for information on implementing a custom mapping provider.
#
#module: mapping_provider.OidcMappingProvider
# Custom configuration values for the module. This section will be passed as
# a Python dictionary to the user mapping provider module's `parse_config`
# method.
#
# The examples below are intended for the default provider: they should be
# changed if using a custom provider.
#
config:
# name of the claim containing a unique identifier for the user.
# Defaults to `sub`, which OpenID Connect compliant providers should provide.
#
#subject_claim: "sub"
# Jinja2 template for the localpart of the MXID.
#
# When rendering, this template is given the following variables:
# * user: The claims returned by the UserInfo Endpoint and/or in the ID
# Token
#
# If this is not set, the user will be prompted to choose their
# own username.
#
#localpart_template: "{{ user.preferred_username }}"
# Jinja2 template for the display name to set on first login.
#
# If unset, no displayname will be set.
#
#display_name_template: "{{ user.given_name }} {{ user.last_name }}"
# Jinja2 templates for extra attributes to send back to the client during
# login.
#
# Note that these are non-standard and clients will ignore them without modifications.
#
#extra_attributes:
#birthdate: "{{ user.birthdate }}"
#- idp_id: google
# idp_name: Google
# 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 }"
# Enable Central Authentication Service (CAS) for registration and login.

2
synapse/config/cas.py
View File

@ -40,7 +40,7 @@ class CasConfig(Config):
self.cas_required_attributes = {}
def generate_config_section(self, config_dir_path, server_name, **kwargs):
return """
return """\
# Enable Central Authentication Service (CAS) for registration and login.
#
cas_config:

325
synapse/config/oidc_config.py
View File

@ -15,7 +15,7 @@
# limitations under the License.
import string
from typing import Optional, Type
from typing import Iterable, Optional, Type
import attr
@ -33,16 +33,8 @@ class OIDCConfig(Config):
section = "oidc"
def read_config(self, config, **kwargs):
validate_config(MAIN_CONFIG_SCHEMA, config, ())
self.oidc_provider = None # type: Optional[OidcProviderConfig]
oidc_config = config.get("oidc_config")
if oidc_config and oidc_config.get("enabled", False):
validate_config(OIDC_PROVIDER_CONFIG_SCHEMA, oidc_config, ("oidc_config",))
self.oidc_provider = _parse_oidc_config_dict(oidc_config)
if not self.oidc_provider:
self.oidc_providers = tuple(_parse_oidc_provider_configs(config))
if not self.oidc_providers:
return
try:
@ -58,144 +50,153 @@ class OIDCConfig(Config):
@property
def oidc_enabled(self) -> bool:
# OIDC is enabled if we have a provider
return bool(self.oidc_provider)
return bool(self.oidc_providers)
def generate_config_section(self, config_dir_path, server_name, **kwargs):
return """\
# Enable OpenID Connect (OIDC) / OAuth 2.0 for registration and login.
# List of OpenID Connect (OIDC) / OAuth 2.0 identity providers, for registration
# and login.
#
# Options for each entry include:
#
# idp_id: a unique identifier for this identity provider. Used internally
# by Synapse; should be a single word such as 'github'.
#
# Note that, if this is changed, users authenticating via that provider
# will no longer be recognised as the same user!
#
# idp_name: A user-facing name for this identity provider, which is used to
# offer the user a choice of login mechanisms.
#
# discover: set to 'false' to disable the use of the OIDC discovery mechanism
# to discover endpoints. Defaults to true.
#
# issuer: Required. The OIDC issuer. Used to validate tokens and (if discovery
# is enabled) to discover the provider's endpoints.
#
# client_id: Required. oauth2 client id to use.
#
# client_secret: Required. oauth2 client secret to use.
#
# client_auth_method: auth method to use when exchanging the token. Valid
# values are 'client_secret_basic' (default), 'client_secret_post' and
# 'none'.
#
# scopes: list of scopes to request. This should normally include the "openid"
# scope. Defaults to ["openid"].
#
# authorization_endpoint: the oauth2 authorization endpoint. Required if
# provider discovery is disabled.
#
# token_endpoint: the oauth2 token endpoint. Required if provider discovery is
# disabled.
#
# userinfo_endpoint: the OIDC userinfo endpoint. Required if discovery is
# disabled and the 'openid' scope is not requested.
#
# jwks_uri: URI where to fetch the JWKS. Required if discovery is disabled and
# the 'openid' scope is used.
#
# skip_verification: set to 'true' to skip metadata verification. Use this if
# you are connecting to a provider that is not OpenID Connect compliant.
# Defaults to false. Avoid this in production.
#
# user_profile_method: Whether to fetch the user profile from the userinfo
# endpoint. Valid values are: 'auto' or 'userinfo_endpoint'.
#
# Defaults to 'auto', which fetches the userinfo endpoint if 'openid' is
# included in 'scopes'. Set to 'userinfo_endpoint' to always fetch the
# userinfo endpoint.
#
# allow_existing_users: set to 'true' to allow a user logging in via OIDC to
# match a pre-existing account instead of failing. This could be used if
# switching from password logins to OIDC. Defaults to false.
#
# user_mapping_provider: Configuration for how attributes returned from a OIDC
# provider are mapped onto a matrix user. This setting has the following
# sub-properties:
#
# module: The class name of a custom mapping module. Default is
# {mapping_provider!r}.
# See https://github.com/matrix-org/synapse/blob/master/docs/sso_mapping_providers.md#openid-mapping-providers
# for information on implementing a custom mapping provider.
#
# config: Configuration for the mapping provider module. This section will
# be passed as a Python dictionary to the user mapping provider
# module's `parse_config` method.
#
# For the default provider, the following settings are available:
#
# sub: name of the claim containing a unique identifier for the
# user. Defaults to 'sub', which OpenID Connect compliant
# providers should provide.
#
# localpart_template: Jinja2 template for the localpart of the MXID.
# If this is not set, the user will be prompted to choose their
# own username.
#
# display_name_template: Jinja2 template for the display name to set
# on first login. If unset, no displayname will be set.
#
# extra_attributes: a map of Jinja2 templates for extra attributes
# to send back to the client during login.
# Note that these are non-standard and clients will ignore them
# without modifications.
#
# When rendering, the Jinja2 templates are given a 'user' variable,
# which is set to the claims returned by the UserInfo Endpoint and/or
# in the ID Token.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/openid.md
# for some example configurations.
# for information on how to configure these options.
#
oidc_config:
# Uncomment the following to enable authorization against an OpenID Connect
# server. Defaults to false.
# For backwards compatibility, it is also possible to configure a single OIDC
# provider via an 'oidc_config' setting. This is now deprecated and admins are
# advised to migrate to the 'oidc_providers' format.
#
oidc_providers:
# Generic example
#
#enabled: true
#- idp_id: my_idp
# idp_name: "My OpenID provider"
# discover: false
# issuer: "https://accounts.example.com/"
# client_id: "provided-by-your-issuer"
# client_secret: "provided-by-your-issuer"
# client_auth_method: client_secret_post
# scopes: ["openid", "profile"]
# authorization_endpoint: "https://accounts.example.com/oauth2/auth"
# token_endpoint: "https://accounts.example.com/oauth2/token"
# userinfo_endpoint: "https://accounts.example.com/userinfo"
# jwks_uri: "https://accounts.example.com/.well-known/jwks.json"
# skip_verification: true
# Uncomment the following to disable use of the OIDC discovery mechanism to
# discover endpoints. Defaults to true.
# For use with Keycloak
#
#discover: false
#- idp_id: keycloak
# idp_name: Keycloak
# issuer: "https://127.0.0.1:8443/auth/realms/my_realm_name"
# client_id: "synapse"
# client_secret: "copy secret generated in Keycloak UI"
# scopes: ["openid", "profile"]
# the OIDC issuer. Used to validate tokens and (if discovery is enabled) to
# discover the provider's endpoints.
# For use with Github
#
# Required if 'enabled' is true.
#
#issuer: "https://accounts.example.com/"
# oauth2 client id to use.
#
# Required if 'enabled' is true.
#
#client_id: "provided-by-your-issuer"
# oauth2 client secret to use.
#
# Required if 'enabled' is true.
#
#client_secret: "provided-by-your-issuer"
# auth method to use when exchanging the token.
# Valid values are 'client_secret_basic' (default), 'client_secret_post' and
# 'none'.
#
#client_auth_method: client_secret_post
# list of scopes to request. This should normally include the "openid" scope.
# Defaults to ["openid"].
#
#scopes: ["openid", "profile"]
# the oauth2 authorization endpoint. Required if provider discovery is disabled.
#
#authorization_endpoint: "https://accounts.example.com/oauth2/auth"
# the oauth2 token endpoint. Required if provider discovery is disabled.
#
#token_endpoint: "https://accounts.example.com/oauth2/token"
# the OIDC userinfo endpoint. Required if discovery is disabled and the
# "openid" scope is not requested.
#
#userinfo_endpoint: "https://accounts.example.com/userinfo"
# URI where to fetch the JWKS. Required if discovery is disabled and the
# "openid" scope is used.
#
#jwks_uri: "https://accounts.example.com/.well-known/jwks.json"
# Uncomment to skip metadata verification. Defaults to false.
#
# Use this if you are connecting to a provider that is not OpenID Connect
# compliant.
# Avoid this in production.
#
#skip_verification: true
# Whether to fetch the user profile from the userinfo endpoint. Valid
# values are: "auto" or "userinfo_endpoint".
#
# Defaults to "auto", which fetches the userinfo endpoint if "openid" is included
# in `scopes`. Uncomment the following to always fetch the userinfo endpoint.
#
#user_profile_method: "userinfo_endpoint"
# Uncomment to allow a user logging in via OIDC to match a pre-existing account instead
# of failing. This could be used if switching from password logins to OIDC. Defaults to false.
#
#allow_existing_users: true
# An external module can be provided here as a custom solution to mapping
# attributes returned from a OIDC provider onto a matrix user.
#
user_mapping_provider:
# The custom module's class. Uncomment to use a custom module.
# Default is {mapping_provider!r}.
#
# See https://github.com/matrix-org/synapse/blob/master/docs/sso_mapping_providers.md#openid-mapping-providers
# for information on implementing a custom mapping provider.
#
#module: mapping_provider.OidcMappingProvider
# Custom configuration values for the module. This section will be passed as
# a Python dictionary to the user mapping provider module's `parse_config`
# method.
#
# The examples below are intended for the default provider: they should be
# changed if using a custom provider.
#
config:
# name of the claim containing a unique identifier for the user.
# Defaults to `sub`, which OpenID Connect compliant providers should provide.
#
#subject_claim: "sub"
# Jinja2 template for the localpart of the MXID.
#
# When rendering, this template is given the following variables:
# * user: The claims returned by the UserInfo Endpoint and/or in the ID
# Token
#
# If this is not set, the user will be prompted to choose their
# own username.
#
#localpart_template: "{{{{ user.preferred_username }}}}"
# Jinja2 template for the display name to set on first login.
#
# If unset, no displayname will be set.
#
#display_name_template: "{{{{ user.given_name }}}} {{{{ user.last_name }}}}"
# Jinja2 templates for extra attributes to send back to the client during
# login.
#
# Note that these are non-standard and clients will ignore them without modifications.
#
#extra_attributes:
#birthdate: "{{{{ user.birthdate }}}}"
#- idp_id: google
# idp_name: Google
# 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 }}"
""".format(
mapping_provider=DEFAULT_USER_MAPPING_PROVIDER
)
@ -234,7 +235,22 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
},
}
# the `oidc_config` setting can either be None (as it is in the default
# the same as OIDC_PROVIDER_CONFIG_SCHEMA, but with compulsory idp_id and idp_name
OIDC_PROVIDER_CONFIG_WITH_ID_SCHEMA = {
"allOf": [OIDC_PROVIDER_CONFIG_SCHEMA, {"required": ["idp_id", "idp_name"]}]
}
# the `oidc_providers` list can either be None (as it is in the default config), or
# a list of provider configs, each of which requires an explicit ID and name.
OIDC_PROVIDER_LIST_SCHEMA = {
"oneOf": [
{"type": "null"},
{"type": "array", "items": OIDC_PROVIDER_CONFIG_WITH_ID_SCHEMA},
]
}
# the `oidc_config` setting can either be None (which it used to be in the default
# config), or an object. If an object, it is ignored unless it has an "enabled: True"
# property.
#
@ -243,12 +259,41 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
# additional checks in the code.
OIDC_CONFIG_SCHEMA = {"oneOf": [{"type": "null"}, {"type": "object"}]}
# the top-level schema can contain an "oidc_config" and/or an "oidc_providers".
MAIN_CONFIG_SCHEMA = {
"type": "object",
"properties": {"oidc_config": OIDC_CONFIG_SCHEMA},
"properties": {
"oidc_config": OIDC_CONFIG_SCHEMA,
"oidc_providers": OIDC_PROVIDER_LIST_SCHEMA,
},
}
def _parse_oidc_provider_configs(config: JsonDict) -> Iterable["OidcProviderConfig"]:
"""extract and parse the OIDC provider configs from the config dict
The configuration may contain either a single `oidc_config` object with an
`enabled: True` property, or a list of provider configurations under
`oidc_providers`, *or both*.
Returns a generator which yields the OidcProviderConfig objects
"""
validate_config(MAIN_CONFIG_SCHEMA, config, ())
for p in config.get("oidc_providers") or []:
yield _parse_oidc_config_dict(p)
# for backwards-compatibility, it is also possible to provide a single "oidc_config"
# object with an "enabled: True" property.
oidc_config = config.get("oidc_config")
if oidc_config and oidc_config.get("enabled", False):
# MAIN_CONFIG_SCHEMA checks that `oidc_config` is an object, but not that
# it matches OIDC_PROVIDER_CONFIG_SCHEMA (see the comments on OIDC_CONFIG_SCHEMA
# above), so now we need to validate it.
validate_config(OIDC_PROVIDER_CONFIG_SCHEMA, oidc_config, ("oidc_config",))
yield _parse_oidc_config_dict(oidc_config)
def _parse_oidc_config_dict(oidc_config: JsonDict) -> "OidcProviderConfig":
"""Take the configuration dict and parse it into an OidcProviderConfig

27
synapse/handlers/oidc_handler.py
View File

@ -78,21 +78,28 @@ class OidcHandler:
def __init__(self, hs: "HomeServer"):
self._sso_handler = hs.get_sso_handler()
provider_conf = hs.config.oidc.oidc_provider
provider_confs = hs.config.oidc.oidc_providers
# we should not have been instantiated if there is no configured provider.
assert provider_conf is not None
assert provider_confs
self._token_generator = OidcSessionTokenGenerator(hs)
self._provider = OidcProvider(hs, self._token_generator, provider_conf)
self._providers = {
p.idp_id: OidcProvider(hs, self._token_generator, p) for p in provider_confs
}
async def load_metadata(self) -> None:
"""Validate the config and load the metadata from the remote endpoint.
Called at startup to ensure we have everything we need.
"""
await self._provider.load_metadata()
await self._provider.load_jwks()
for idp_id, p in self._providers.items():
try:
await p.load_metadata()
await p.load_jwks()
except Exception as e:
raise Exception(
"Error while initialising OIDC provider %r" % (idp_id,)
) from e
async def handle_oidc_callback(self, request: SynapseRequest) -> None:
"""Handle an incoming request to /_synapse/oidc/callback
@ -184,6 +191,12 @@ class OidcHandler:
self._sso_handler.render_error(request, "mismatching_session", str(e))
return
oidc_provider = self._providers.get(session_data.idp_id)
if not oidc_provider:
logger.error("OIDC session uses unknown IdP %r", oidc_provider)
self._sso_handler.render_error(request, "unknown_idp", "Unknown IdP")
return
if b"code" not in request.args:
logger.info("Code parameter is missing")
self._sso_handler.render_error(
@ -193,7 +206,7 @@ class OidcHandler:
code = request.args[b"code"][0].decode()
await self._provider.handle_oidc_callback(request, session_data, code)
await oidc_provider.handle_oidc_callback(request, session_data, code)
class OidcError(Exception):

4
tests/handlers/test_oidc.py
View File

@ -145,7 +145,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
hs = self.setup_test_homeserver(proxied_http_client=self.http_client)
self.handler = hs.get_oidc_handler()
self.provider = self.handler._provider
self.provider = self.handler._providers["oidc"]
sso_handler = hs.get_sso_handler()
# Mock the render error method.
self.render_error = Mock(return_value=None)
@ -866,7 +866,7 @@ async def _make_callback_with_userinfo(
from synapse.handlers.oidc_handler import OidcSessionData
handler = hs.get_oidc_handler()
provider = handler._provider
provider = handler._providers["oidc"]
provider._exchange_code = simple_async_mock(return_value={})
provider._parse_id_token = simple_async_mock(return_value=userinfo)
provider._fetch_userinfo = simple_async_mock(return_value=userinfo)