Use Case 13 - User Authorization

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Goal

Determine if a user is authorized to perform some action on an object (e.g. get, put, query, delete, ...).

Summary

User authorization is the process followed to determine if the authenticated user is permitted to perform some operation. The result will always be True or False.

Note: Need to define which objects require access control / authorization

Actors

• User
• Client application
• Member Node
• Coordinating Node

Preconditions

• User is at some level of authentication (may be anonymous or logged in)

Triggers

• User is requesting some operation to be performed on an object
• An operation acting as a proxy for a user performs some operation on an object

Post Conditions

• The operation continues if the user is authorized or terminates raising an unauthorized exception.

Figure 1. Interactions for use case 13.