46 lines
1.7 KiB
Text
46 lines
1.7 KiB
Text
[[_enforcer_bearer]]
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==== Protecting a Stateless Service Using a Bearer Token
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If the adapter is configured with the `bearer-only` configuration option, the policy enforcer decides whether a request
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to access a protected resource is allowed or denied based on the permissions of the bearer token.
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. HTTP GET example passing an RPT as a bearer token
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```bash
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GET /my-resource-server/my-protected-resource HTTP/1.1
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Host: host.com
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Authorization: Bearer ${RPT}
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...
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```
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In this example, a *keycloak.json* file in your application is similar to the following:
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.Example of WEB-INF/keycloak.json with the bearer-only configuration option
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```json
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...
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"bearer-only" : true,
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...
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```
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===== Authorization Response
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When a client tries to access a resource server with a bearer token that is lacking permissions to access a protected resource, the resource server
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responds with a *401* status code and a `WWW-Authenticate` header. The value of the `WWW-Authenticate` header depends on the authorization protocol
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in use by the resource server.
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Here is an example of a response from a resource server that is using UMA as the authorization protocol:
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```bash
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HTTP/1.1 401 Unauthorized
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WWW-Authenticate: UMA realm="photoz-restful-api",as_uri="http://localhost:8080/auth/realms/photoz/authz/authorize",ticket="${PERMISSION_TICKET}"
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```
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And another example when the resource server is using the Entitlement protocol:
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```bash
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HTTP/1.1 401 Unauthorized
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WWW-Authenticate: KC_ETT realm="photoz-restful-api",as_uri="http://localhost:8080/auth/realms/photoz/authz/entitlement"
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```
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Once a client receives a response from the server, it examines the status code and `WWW-Authenticate` header to obtain an RPT from the {project_name} Server.
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