How to implement role-based access control

What Is RBAC?

Role-Based Access Control (RBAC) assigns permissions to roles, then grants roles to users. This simplifies administration because you manage a smaller number of roles rather than individual user permissions.

Core Components

• Users: Individuals or service accounts.
• Roles: Named sets of permissions (e.g., Admin, Editor, Viewer).
• Permissions: Granular rights like read:posts, delete:users.
• Assignments: Links between users and roles.

Implementation Example

def check_permission(user, action, resource):
    for role in user.roles:
        if action in role.permissions.get(resource, set()):
            return True
    return False

Best Practices

• Follow the principle of least privilege.
• Regularly audit role assignments.
• Separate administrative roles from operational ones.
• Use groups or attributes for dynamic assignments in large organizations.

RBAC differs from authentication, which establishes identity. See authentication vs authorization for clarity. For securing the APIs that enforce RBAC, how to secure a REST API provides practical guidance.