53 lines
2.8 KiB
Text
53 lines
2.8 KiB
Text
[[_protocol-mappers]]
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=== OIDC Token and SAML Assertion Mappings
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Applications that receive ID Tokens, Access Tokens, or SAML assertions may need or want different user metadata and roles.
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{project_name} allows you to define what exactly is transferred.
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You can hardcode roles, claims and custom attributes.
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You can pull user metadata into a token or assertion.
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You can rename roles.
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Basically you have a lot of control of what exactly goes back to the client.
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Within the Admin Console, if you go to an application you've registered, you'll see a `Mappers` tab. Here's one for
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an OIDC based client.
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.Mappers Tab
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image:{project_images}/mappers-oidc.png[]
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The new client does not have any built-in mappers, however it usually inherits some mappers from the client scopes as described
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in the <<_client_scopes, client scopes section>>. Protocol mappers map things like, for example, email address to
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a specific claim in the identity and access token. Their function should each be self explanatory from their name. There
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are additional pre-configured mappers that are not attached to the client that you can add
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by clicking the `Add Builtin` button.
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Each mapper has common settings as well as additional ones depending on which type of mapper you are adding. Click the `Edit` button
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next to one of the mappers in the list to get to the config screen.
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.Mapper Config
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image:{project_images}/mapper-config.png[]
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The best way to learn about a config option is to hover over its tooltip.
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Most OIDC mappers also allow you to control where the claim gets put. You can opt to include or exclude the claim from both the
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_id_ and _access_ tokens by fiddling with the `Add to ID token` and `Add to access token` switches.
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Finally, you can also add other mapper types. If you go back to the `Mappers` tab, click the `Create` button.
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.Add Mapper
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image:{project_images}/add-mapper.png[]
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Pick a `Mapper Type` from the list box. If you hover over the tooltip, you'll see a description of what that mapper type does.
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Different config parameters will appear for different mapper types.
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==== Priority order
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Mapper implementations have _priority order_. This priority order is not the configuration property of the mapper; rather, it is
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the property of the concrete implementation of the mapper.
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Mappers are sorted in the admin console by the order in the list of mappers and the changes in the token or assertion will be
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applied using that order with the lowest being applied first. This means that implementations which are dependent on other
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implementations are processed in the needed order.
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For example, when we first want to compute the roles which will be included with a token, we first resolve audiences based on
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those roles. Then, we process a JavaScript script that uses the roles and audiences already available in the token.
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