HP-UX System Administrator's Guide: Security Management HP-UX 11i v3 (B3921-90020, September 2010)

8.4.1 Planning the Roles
Planning an appropriate set of roles for the users of a system is a critical first step in
deploying HP-UX RBAC. In some enterprises, this set of roles already exists, and you
can reuse it when configuring HP-UX RBAC. More commonly, you must design the
roles based on the existing tasks associated with administrative users on the system.
Consider the following guidelines when designing roles:
• There should be considerably fewer roles than the total number of users of the
system. If each user requires a special role, then all of the simplified management
associated with the use of roles is no longer in place.
• Roles should have some relation to the actual business roles of the users.
• Users can have multiple roles, and therefore you can design some roles simply to
group authorizations common to multiple business roles. Using this approach,
you can design roles hierarchically to include different roles by including their
authorizations.
8.4.2 Planning Authorizations for the Roles
After defining roles, you can plan the authorizations associated with each role. If the
roles align with the pre-existing operation hierarchy, then assigning the authorizations
is straightforward. Enter the following command to list all the system-defined
authorizations:
# authadm list sys
If the existing authorization hierarchy does not align with your roles, defining the
authorizations associated with each role is more complex. You can use the following
steps to help:
1. List the system commands commonly used by each role.
2. Compare these commands to the commands in the /etc/rbac/cmd_priv
database.
3. If you find matching entries after performing the previous steps, use those entries
as a guide for assigning authorizations.
For example, assume one of the desired roles is UserOperator, which commonly runs
such commands as useradd, usermod, userdel, and so on. To determine what
authorizations might be appropriate for this role, enter the following command:
# grep useradd /etc/rbac/cmd_priv
/usr/sbin/useradd:dflt:(hpux.user.add,*):0/0//:dflt:dflt:dflt:
In this example, the /usr/sbin/useradd command requires the hpux.user.add
authorization. You could assign this authorization directly, or assign hpux.user.*
as the authorization.
Be careful using wildcards when assigning authorizations. Assigning this authorization
actually assigns multiple authorizations:
146 HP-UX Role-Based Access Control