58 lines
2 KiB
Text
58 lines
2 KiB
Text
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== Requesting Authorization Data and Token
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Client applications using the UMA protocol can use a specific endpoint to obtain a special security token called *Requesting Party Token* or *RPT*.
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This token consists of all the permissions granted to an user as a result of the evaluation of the permissions and authorization policies associated with the resource(s) being requested.
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With an RPT in hands, client applications can gain access to protected resources at the resource server.
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```bash
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http://${host}:${port}/auth/realms/${realm_name}/authz/authorize
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```
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When asking for a RPT, you need to provide two main things:
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* A permission ticket with the resources you want to access
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* The AAT (as a bearer token) representing user's identity and his consent to access authorization data on his behalf.
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```bash
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curl -X POST
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-H "Authorization: Bearer ${AAT}" -d '{
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"ticket" : ${PERMISSION_TICKET}
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}' "http://localhost:8080/auth/realms/hello-world-authz/authz/authorize"
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```
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As a result, you will get the follow response from the server:
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```json
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{"rpt":"${RPT}"}
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```
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=== Requesting Party Token or RPT
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A RPT is basically a https://tools.ietf.org/html/rfc7519[JSON Web Token (JWT)] digitally signed using https://www.rfc-editor.org/rfc/rfc7515.txt[JSON Web Signature (JWS)].
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Its lifetime is the same as with the OAuth2 access token (AAT) that was used to obtain it.
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When you decode a RPT you will see something like that:
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```json
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{
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"permissions": [
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{
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"resource_set_id": "152251e6-f4cf-4464-8d91-f1b7960fa5fc",
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"resource_set_name": "Hello World Resource"
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"scopes": []
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}
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],
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"accessToken": ${AAT},
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"jti": "d6109a09-78fd-4998-bf89-95730dfd0892-1464906679405",
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"exp": 1464906971,
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"nbf": 0,
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"iat": 1464906671,
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"sub": "f1888f4d-5172-4359-be0c-af338505d86c",
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"typ": "kc_ett",
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"azp": "hello-world-authz-service"
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}
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```
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The *permissions* claim consists of all the permissions granted by the server. There is also a *accessToken* property holding the AAT that was used to issue the RPT.
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