Understanding RBAC

• Users: Individuals who access the system.
• Roles: Defined sets of permissions that can be assigned to users (e.g., Administrator, Editor, Viewer).
• Permissions: Specific rights to perform actions within the system (e.g., read, write, delete).

Basic Implementation Steps

1. Define Classes for Users, Roles, and Permissions:

• Create a Permission class to represent individual permissions.
• Create a Role class that contains a collection of permissions.
• Create a User class that can be assigned multiple roles.
  Here’s a simple example:

class Permission:
def __init__(self, name):
self.name = name
class Role:
def __init__(self, name):
self.name = name
self.permissions = []
def add_permission(self, permission):
self.permissions.append(permission)
class User:
def __init__(self, username):
self.username = username
self.roles = []
def add_role(self, role):
self.roles.append(role)

2. Create Permissions and Roles:

• Instantiate permissions and roles, and assign permissions to roles.

read_permission = Permission("read")
write_permission = Permission("write")
admin_role = Role("admin")
admin_role.add_permission(read_permission)
admin_role.add_permission(write_permission)
user_role = Role("user")
user_role.add_permission(read_permission)

3. Assign Roles to Users:

• Create user instances and assign them roles.

alice = User("Alice")
alice.add_role(admin_role)
bob = User("Bob")
bob.add_role(user_role)

4. Check Permissions:

• Implement a method to check if a user has a specific permission based on their roles.

def has_permission(user, permission_name):
for role in user.roles:
for permission in role.permissions:
if permission.name == permission_name:
return True
return False
# Example usage
print(has_permission(alice, "write"))  # True
print(has_permission(bob, "write"))    # False

Using Libraries for RBAC

Conclusion