Permissions

If you need to grant your enterprise personnel permission to access your KooDrive resources, use Identity and Access Management (IAM). IAM provides identity authentication, fine-grained permissions management, and access control. IAM helps you secure access to your Huawei Cloud resources. If your HUAWEI ID does not require individual IAM users for permissions management, you can skip this section.

IAM is a free service. You only pay for the resources in your account.

With IAM, you can control access to specific Huawei Cloud resources. For example, if you want some software developers in your enterprise to use KooDrive resources but do not want them to delete KooDrive resources or perform any other high-risk operations, you can create IAM users and grant permission to use KooDrive but not permission to delete them.

IAM supports role/policy-based authorization and identity policy-based authorization.

The following table describes the differences between these two authorization models.

**Table 1** Differences between role/policy-based and identity policy-based authorization
Authorization Model	Core Relationship	Permissions	Authorization Method	Scenario
Role/Policy	User-permission-authorization scope	System-defined roles System-defined policies Custom policies	Assigning roles or policies to principals	To authorize a user, you need to add it to a user group first and then specify the scope of authorization. It provides a limited number of condition keys and cannot meet the requirements of fine-grained permissions control. This method is suitable for small- and medium-sized enterprises.
Identity policy	User-policy	System-defined identity policies Custom identity policies	Assigning identity policies to principals Attaching identity policies to principals	You can authorize a user by attaching an identity policy to it. User-specific authorization and a variety of key conditions allow for more fine-grained permissions control. However, this model can be hard to set up. It requires a certain amount of expertise and is suitable for medium- and large-sized enterprises.

Policies/identity policies and actions in the two authorization models are not interoperable. You are advised to use the identity policy-based authorization model. For details about system-defined permissions, see Role/Policy-based Permissions Management and Identity Policy-based Authorization.

For more information about IAM, see IAM Service Overview.

Role/Policy-based Permissions Management

KooDrive supports role- and policy-based authorization. New IAM users do not have any permissions assigned by default. You need to first add them to one or more groups and then attach policies or roles to these groups. The users then inherit permissions from the groups and can perform specified operations on cloud services based on the permissions they have been assigned.

KooDrive is a project-level service deployed for specific regions. When you set Scope to Region-specific projects and select projects (for example, ap-southeast-3) in the specified regions (for example, AP-Singapore), the users only have permissions for KooDrive resources in the selected projects. If you set Scope to All resources, the users have permissions for KooDrive resources in all region-specific projects. When accessing KooDrive, the users need to switch to the authorized region.

Table 2 lists all the system-defined permissions for KooDrive. System-defined policies in role/policy-based authorization are not interoperable with those in identity policy-based authorization.

**Table 2** System-defined permissions for KooDrive
Role/Policy Name	Description	Type	Dependencies
KooDrive FullAccess	Administrator permissions for KooDrive. Users with these permissions can operate and use all KooDrive services, but cannot perform the following operations: Subscribing to the service Unsubscribing from the service Logging in to the KooDrive service plane	System-defined policy	None

Table 3 lists the common operations supported by system-defined permissions for KooDrive.

**Table 3** Common operations and system-defined permissions
Operation	KooDrive FullAccess
Configuring default space size	√
Configuring file storage location	√
Configuring the default service address	√

Identity Policy-based Authorization

KooDrive supports identity policy-based authorization. Table 4 lists all the system-defined identity policies for KooDrive. System-defined policies in identity policy-based authorization are not interoperable with those in role/policy-based authorization.

**Table 4** System-defined identity policies for KooDrive
Identity Policy Name	Description	Type
KooDriveFullAccessPolicy	Full permissions for KooDrive, except the following: Subscribing to the service Unsubscribing from the service Logging in to the KooDrive service plane	System-defined identity policy