Overview

Based on Resource Access Manager (RAM), resource owners can configure the sharing permissions based on the least privilege principle and different usage requirements. Resource users can only access resources within their permissions, improving resource management security and user experience. For more information about RAM, see What Is RAM?.

If your account is managed by Huawei Cloud organizations, you can enable this function to share resources more easily. If your account is in an organization, you can share resources with a specified account or all accounts in the organizations, needless to select all accounts one by one. For details, see Enabling Sharing with Organizations.

Constraints

You must own the KMS key resources. You cannot share the KMS key resources that have been shared with you.
If you need to share KMS key resources with your organization, enable this function. For more information, see Enabling Sharing with Organizations.

Key Owner and Recipient Permissions

Key owners can perform all operations on keys, while recipients can only perform certain operations. For details, see Table 1.

**Table 1** Operations supported for key recipients
Role	Allowed Operation	Description
Recipient	kms:cmk:get	Access through the console or API
	kms:cmk:createDataKey	Access through API only
	kms:cmk:createDataKeyWithoutPlaintext	Access through API only
	kms:cmk:encryptDataKey	Access through API only
	kms:cmk:decryptDataKey	Access through API only
	kms:cmk:encryptData	Access through the console or API
	kms:cmk:decryptData	Access through the console or API
	kms:cmk:sign	Access through API only
	kms:cmk:verify	Access through API only
	kms:cmk:generateMac	Access through API only
	kms:cmk:verifyMac	Access through API only
	kms:cmk:getPublicKey	Access through the console or API
	kms:cmk:getRotation	Access through the console or API
	kms:cmk:getTags	Access through the console or API

Supported Resource Types and Regions

The following table lists the resource types and regions can be shared in DEW.

**Table 2** Supported resource types and regions in DEW
Cloud Service	Resource Type	Supported Region
KMS	CMK	All regions support sharing.

Services That Support Shared Key Encryption and System-defined Policies

If you choose to encrypt created resources using a shared key when purchasing yearly/monthly resources, you need to grant the corresponding policy to the user so that the shared key can be used. Table 3 lists the services and the corresponding system-defined policies that support shared key encryption.

For details about how to grant permissions to an IAM user, see Assigning Permissions to an IAM User. Select the system policy based on Table 3.

**Table 3** Services that support shared key encryption and system-defined policies
Service	System-defined Policy
Relational Database Service (RDS)	ServicePolicyForRDSFulfillment
TaurusDB	ServicePolicyForGaussDBFulfillment
Document Database Service (DDS)	ServicePolicyForDDSFulfillment
Scalable File Service Turbo (SFS Turbo)	ServicePolicyForSFSTurboFulfillment
Workspace	ServicePolicyForWorkspaceFulfillment
GeminiDB	ServicePolicyForNosqlFulfillment