| Input: receiving Req = R (Subj, Obj, Action, Cntxt-info) |
| Output: |
| (1) | Authorization_status {Yes, No} |
| (2) | Request _decision = {Accept, Reject} |
| (3) | Procedure: |
| (4) | Preexecution Algorithm: |
| (5) | Access Policy Repository |
| (6) | Set_Policy = Get_object_policy_info (Obj) |
| (7) | If (Policy = = NULL) |
| (8) | Set_authorization_status = (NO) |
| (9) | Request_decision = “Reject” |
| (10) | Else |
| (11) | Loop through Pre_Con_L items |
| (12) | Set Pre_conditions = Get_preconditions (Pre_Con_L) |
| (13) | Set Post_conditions = Get_postconditions (Post_Con_L) |
| (14) | If (Pre_conditions = = NULL) |
| (15) | Set Pre_authorization_status (“Yes”) |
| (16) | Else |
| (17) | Pre-authorization_status = Check_authorization (Pre_conditions) |
| (18) | Post_result = Check_authorization (Post_conditions) |
| (19) | End |
| (20) | End |
| (21) | If (Pre_authorization_status = (“Yes”) |
| (22) | Set authorization_status_L = (Post_result, Pre_authorization_status) |
| (23) | Else |
| (24) | Request_decision = “Reject” |
| (25) | Invoke Privacy_policy (Req, authorization_status_L) |
| (26) | Invoke Response _Policy (Req, authorization_status_L) |
| (27) | End |
| (28) | End |
| (29) | If (authorization_status_L = (“Yes, Yes”) |
| (30) | Call During execution Algorithm |
| (31) | Else |
| (32) | Invoke Privacy_policy (Req, authorization_status_L) |
| (33) | Invoke Response _Policy (Req, authorization_status_L) |
| (34) | End |
