Granting Other Accounts the Specified Permissions for Certain Objects

Scenario

This case describes how to grant other accounts the specified permissions for a specified object in an OBS bucket. The following describes how to grant the permission to download an object.

If you need to configure other permissions, select the corresponding actions from the Action Name drop-down list in the bucket policy. For details about the actions supported by OBS, see Action/NotAction.

For details about how to grant permissions to an IAM user, see Granting IAM Users Under an Account the Access to a Bucket and the Resources in It.

Recommended Configuration

You are advised to use bucket policies to grant permissions to other accounts.

Configuration Precautions

After the configuration is complete, you can download objects using APIs or SDKs. However, if you log in to OBS Console or OBS Browser+ to download an object, an error is reported indicating that you do not have required permissions.

This is because when you log in to OBS Console or OBS Browser+, APIs (such as ListAllMyBuckets and ListBucket) are called to load the bucket list and object list and some other APIs will also be called on other pages, but your permissions do not cover those APIs. In such case, your access is denied or your operation is not allowed.

Procedure

1. In the navigation pane of OBS Console, choose Object Storage.
2. In the bucket list, click the bucket name you want to go to the Objects page.
3. In the navigation pane, choose Permissions > Bucket Policy.
4. On the Bucket Policies page, click Create.
5. Locate the row containing Custom policy and click Create Custom Policy.
6. Configure parameters for a bucket policy.
   Figure 1 Configuring bucket policy parameters
   

   Table 1 Parameter description

   Parameter	Description
   Policy View	Set this parameter based on your own habits. Visual editor is used here.
   Policy Name	Enter a policy name.
   Policy Content	Select Allow. Set Principal to Other account. Account ID: Enter the ID of the account which you want to grant permissions to. You can obtain it from the My Credentials page of the account. IAM User ID: Enter the account ID. You can obtain it from the My Credentials page of the account. User Policy: Select Include specified users. Parameters under Resources: Resource: Select Object in bucket and then select Specified objects. For one object, enter object name. For a set of objects, enter object name prefix + *, * + object name suffix, or *. Resource Policy: Select Include specified resources. Parameters under Actions: Select GetObject. To configure other permissions, select the corresponding actions. For details about the actions supported by OBS, see Bucket Policy Parameters. Operation Strategy: Select Include selected.

7. After configuring the required parameters, click Next.
8. Ensure all the configurations are correct and click Create.