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Describes how messages requesting operation on a collection are checked against the permission model. |
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The process of authorising operations is to ensure that the client requesting an operation is allowed to do so. To authorise an operation it is a prerequisite that the message has been authenticated as described in Authentication.
Components participating in a Bit Repository where RequireOperationAuthorization in RepositorySettings have been set to true is required to authorise any operation prior to performing them.
To authorise an operation a component must use the certificate used to sign the request and lookup its permissions in RepositorySettings.
- The operation can be authorised if the signing certificate have a suitable OperationPermission, see the Operation Permission model section for details.
- An OperationPermission for the specific operation (Protocol messages) or the special "All" OperationPermission the s
- And the OperationPermission applies for the given Collection And the requesting components ID is present in OperationPermissions ComponentIDs list (if not present no restriction is applied to component IDs).
- If no suitable OperationPermission suitable for the requested Operation can be found the component should reject the operation.
- In the event that the request is not an IdentifyRequest, i.e. an OperationRequest, the component should also send an Alarm to notify of the unauthorised request.
Operation Permission model
The
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OperationPermissions consists of:
- An
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- Operation type. There is one Operation type for each operation type (see Protocol messages), and a catch-all named "All"
- An optional list of allowed component IDs where the permission applies i.e. a certificate is allowed to delete a file on PillarA but not on PillarB. If the list is not present it implies that there is no restriction
- An optional list of collection IDs where the OperationPermission applies. If the list is not present it implies that there is no restriction
To be a "suitable" OperationPermission, a request should match all of the available constraints (Operation type, component ID and collection ID).