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Describe arbac02 checks
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shawnmckinney committed Mar 16, 2019
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@@ -375,4 +375,77 @@ This enforcement mechanism maps roles to a given set of services. The following
| Config Manager | true | false | false | false | false | false | false | false | false | true |

___________________________________________________________________________________


### Apache Fortress **ARBAC02 Checks**

Disabled by default. To enable, add this to fortress.properties file and restart instance:

```concept
# Boolean value. Disabled by default. If this is set to true, the runtime will enforce administrative permissions and ARBAC02 DA checks:
is.arbac02=true
```

These checks include the following:

1. All API invocations calls checkAccess on an admin perm corresponding with the API being called, e.g. AdminMgr.addUser. This means at least one admin role activated for the caller has to have been granted that particular permission.

2. The assignUser, deassignUser, grantPermission, revokePermission APIs enforce administrative authority over the role being targeted. This is being done by establishing a range of roles (hierarchically), for which the target role falls inside.

For example, the following top-down role hierarchy:

CTO
|
| |
ENG QC
| | | |
E1 E2 Q1 Q2
| |
DA QA
|
A

Where a role called 'CTO' is the highest ascendant, and 'A' is the lowest descendant. In a top-down role hierarchy, privilege increases as we descend in the tree. So a person with role 'A' inherits all that are above.

In describing a range of roles, begin range is the lowest descendant in the chain, and end range the highest. Furthermore a bracket, '[', ']', indicates inclusiveness, whereas parenthesis indicates exclusiveness for a particular endpoint.

Some example ranges that can be derived:

a. [A, CTO] is the full set: {CTO, ENG, QC, E1, E2, Q1, Q2, DA, QA, A}.
b. (A, CTO) is the full set, minus the endpoints: {ENG, QC, E1, E2, Q1, Q2, DA, QA}.
c. [A, ENG] includes: {A, DA, E1, E2, ENG}
d. [A, ENG) includes: {A, DA, E1, E2}
etc...

So, for an administrator to be able to target a role in one of the specified APIs above, at least one of their activated admin roles must pass the role range test. There are currently two roles
created by the security policy in this project, that are excluded from this type of check:
fortress-rest-admin and fortress-core-super-admin

Which means they won't have to pass the role range test. All others use the range field to define authority over a particular set of roles, in a hierarchical structure.

3. Some APIs on the AdminMgr do organization checks, matching the org on the admin role with that on the target. There are two types of organziations, User and Permission.

For example, de/assignUser(User, Role) will verify that the caller has an admin role with a matching user org unit (UserOU) on the target role.

There is similar check on grant/revokePermission(Role, Permission), where the caller must have activated admin role matching the perm org unit (PermOU), corresponding with permission being targeted.

The complete list of APIs that enforce range and OU checks follow:

| API | Validate UserOU | Validate PermOU | Range Check On Role |
| ------------------------------ | ---------------- | ------------------------------------- |
| AdminMgr.addUser | true | false | false |
| AdminMgr.updateUser | true | false | false |
| AdminMgr.deleteUser | true | false | false |
| AdminMgr.disableUser | true | false | false |
| AdminMgr.changePassword | true | false | false |
| AdminMgr.resetPassword | true | false | false |
| AdminMgr.lockUserAccount | true | false | false |
| AdminMgr.unlockUserAccount | true | false | false |
| AdminMgr.deletePasswordPolicy | true | false | false |
| AdminMgr.assignUser | true | false | true |
| AdminMgr.deassignUser | true | false | true |
| AdminMgr.grantPermission | false | true | true |
| AdminMgr.revokePermission | false | true | true |

#### END OF README

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